JPH08338560A - Valve for fluid - Google Patents

Abstract

PURPOSE: To lightly switch a valve to an outflow state. CONSTITUTION: A valve for a fluid is provided with a valve A disposed in a fluid path for switching between the intercept state for intercepting the flow of a fluid and the outflow state of flowing out a fluid, and with a spring 6 for energizing the rod-like valve element 3 of the valve A to a closing position, a storing chamber 7 for storing the spring 6 is provided separately from a fluid passage chamber 2 of the valve A, and further the valve is provided with an operation part for operating the valve element 3 to an opening position against the energizing force of the spring 6. The valve element 3 comprises a first valve part 3B positioned on the valve seat 5 side forward end side and a second valve part 3C which is positioned in the rear thereof and has a diameter smaller than that of the first valve part 3B. A catching surface for catching a fluid of the fluid in the fluid passage chamber 2 that is positioned in the rear of the first valve part 3B is formed on the rear end part of the first valve part 3B, and a passage 3D for communicating the storing chamber 7 with the fluid passage chamber 2 with the opening operation is formed on the valve element 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid valve provided with a valve for switching between a shut-off state for shutting off a flow of a fluid and an outflow state for letting out a fluid in a fluid path.

[0002]

2. Description of the Related Art Conventionally, a fluid valve shown in FIG. 12 has been used. This forms a fluid passage chamber 2 in the casing 1 for receiving the fluid sent out from the fluid delivery direction X and delivering it in the fluid discharge direction Y, and the rod-shaped valve element 3 inserted into this fluid passage chamber 2. Is movably fitted into the lid 4 of the casing 1, and the lid 4 has a storage chamber 7 for storing a spring 6 for urging the valve body 3 toward the valve seat 5 side. An operation part (not shown) for operating the body 3 in the open position against the biasing force of the spring 6.
The operating shaft 3a of the valve body 3 is interlocked with the operating shaft 3a, and the operating portion is operated against the biasing force of the spring 6, whereby the operating shaft 3a of the valve body 3 is pulled in the direction of arrow Z to operate the valve A.
Was configured to switch to an outflow state in which

In order to keep the valve A in the closed state, the urging force of the spring 6 must be set to a force that overcomes the pressure of the fluid sent out in the fluid sending direction X. In particular, when the valve A is used for a fire hydrant or the like having a large water pressure, the biasing force of the spring 6 is set to be large. Therefore, when the valve A is switched to the outflow state, the operation portion has to be operated with a force that overcomes the large urging force of the spring 6, resulting in poor operability requiring a large operation force.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned situation, the present invention is to solve the problem that the valve can be easily switched to the outflow state.

[0005]

In order to solve the above-mentioned problems, the present invention provides a valve in the fluid path for switching between a shut-off state for shutting off the flow of fluid and an outflow state for letting out the fluid. In order to hold the valve on the shut-off state side, a spring for urging the rod-shaped valve element of the valve to a closed position is provided, and a storage chamber for storing the spring is provided separately from the fluid passage chamber of the valve, and the valve is provided. A valve for a fluid provided with an operating portion for operating a body in an open position against the urging force of the spring, wherein the valve body is a first valve portion located on the valve seat side front end side, and Is also located on the rear side and has a second valve portion having a diameter smaller than that of the first valve portion, and the first valve portion has a first end of the fluid in the fluid passage chamber at the rear end portion of the first valve portion.
A receiving surface for receiving a fluid located behind the valve portion is formed, and a passage is formed in the valve body so as to communicate the storage chamber and the fluid passage chamber with the opening operation of the valve body.

[0006]

When the valve body is in the closed position, the pressure of the fluid delivered from the fluid delivery direction is always applied to the fluid passage chamber of the valve, and a part of this pressure is received by the first valve portion. By pressing the surface, the valve element is pressed toward the closed position. Therefore, the urging force that urges the valve body to the closed position is the sum of the spring force and the pressing force on the receiving surface. Therefore, if the biasing force of the spring is set to a value obtained by subtracting the pressing force on the receiving surface from the biasing force of the conventional spring, the valve element can be reliably biased to the closed position with the same biasing force as the conventional one. .

Then, the opening operation of the valve element is performed by a force similar to the conventional one that resists the total force of the biasing force of the spring and the pressing force on the receiving surface, but at the initial stage of the opening operation of the valve element, When a gap is generated between the valve body and the valve seat, the fluid discharge side passage and the fluid passage chamber are brought into communication with each other, and at the same time, the spring storage chamber is also brought into communication with a passage formed in the valve body, so that the fluid is delivered. The fluid from the direction flows out to the fluid discharge side passage and the spring accommodating chamber, the pressing force on the receiving surface is offset by the force to open the valve body, and the valve body is pushed down only by the biasing force of the spring. . From this state, the opening operation of the valve body may be performed only by the force that opposes the biasing force of the spring. If the opening operation of the valve element is stopped, the valve element is moved to the closed position side only by the urging force of the spring, and at the same time the valve element is located in the closed position, the pressing force acts on the receiving surface,
As described above, the valve body is biased to the closed position by the total force of the biasing force of the spring and the pressing force on the receiving surface.

[0008]

The present invention will be described in more detail with reference to the embodiments shown in the accompanying drawings. 1 and 2 show a valve A which is a fluid valve of the present invention. The valve A is in a shut-off state in which the fluid sent in the fluid delivery direction X is shut off and in the fluid delivery direction X. It is configured to be switchable between an outflow state in which the fluid is received and is sent out in the outflow discharge direction Y. If this valve A is explained in detail, the casing 1
A first pipe 1 which will be described later and is connected to the fluid delivery direction X side.
1 forms a fluid passage chamber 2 for receiving the water sent out in 1 and sending it to a later-described second pipe 12 connected to the fluid discharge direction Y side, and a rod-shaped valve body inserted in this fluid passage chamber 2 3 is movably fitted in a lid 4 of the casing 1, and a lid 7 is formed with an accommodating portion 7 for accommodating a spring 6 for urging the valve element 3 toward the valve seat 5 side.
The operation shaft 19a of the valve body 3 is interlocked by a wire 22 to an operation lever 19 which will be described later as an operation portion for operating the valve body 3 against the urging force of the spring 6 to an open position, and the operation lever 19 Is operated against the urging force of the spring 6 to pull the operation shaft 3a of the valve body 3 in the direction of arrow Z to switch the valve A to the outflow state.

The valve body 3 has a first valve portion 3B formed by externally fitting a tubular packing 23 at a position of the rod-shaped member 3A located on the tip side of the valve seat 5 side, and is located rearward of the first valve portion 3B. And a second valve portion 3C composed of the rod-shaped member 3A having a diameter smaller than that of the first valve portion 3B, and the water in the fluid passage chamber 2 is provided at the rear end portion of the first valve portion 3B. The valve body 3 is provided with a passage 3D that forms a receiving surface B that receives water located behind the first valve portion 3B and that connects the storage chamber 7 and the second pipe 12 on the discharge side. Of the valve seat 5 and the outer peripheral portion of the operating shaft 3a of the valve body 3 facing the storage chamber 7. Therefore, since a part of the water pressure applied to the fluid passage chamber 2 acts on the receiving surface B, even if the value obtained by subtracting the amount of water pressure received by the receiving surface B from the urging force of the spring 6 is subtracted, the same effect as in the conventional case can be obtained. The valve body 3 can be surely biased by the force. Then, as described above, as the operation lever 19 is rocked to the vertical position, the valve body 3
When a gap is generated between the valve seat 5 and the valve seat 5, the second pipe 12 on the discharge side and the fluid passage chamber 2 are brought into communication with each other, and also communicated with the spring storage chamber 7 through the passage 3D formed in the valve body 3. Then, the water from the first pipe 11 flows out to the second pipe 12 and the spring accommodating chamber 7, and the pressing force on the receiving surface B is offset by the force to open the valve body 3, and the spring 6 The valve body 3 is biased toward the closing position side only by the biasing force. From this state, in order to open the valve element 3, the operation lever 19 may be operated with a force that resists only the biasing force of the spring 6. Here, since the urging force of the spring 6 is set to a value obtained by subtracting the amount of water pressure received by the receiving surface B as described above, the operation lever 19 can be operated with a light force. If the opening operation of the valve element 3 is stopped, the valve element 3 is moved to the closed position side only by the urging force of the spring 6, and at the same time when the valve element 3 is located in the closed position, the pressing force on the receiving surface B acts, As described above, the valve body 3 is biased to the closed position by the total force of the biasing force of the spring 6 and the pressing force on the receiving surface B.

As shown in FIGS. 9 and 10, the valve seat 5
The diameter E of the opening 5A is smaller than the diameter of the packing 23, that is, the diameter F of the first valve portion 3B, and the diameter of the rod-shaped member 3A, that is, the diameter G of the second valve portion 3C is the above. The diameter is smaller than the diameter E of the opening 5A of the valve seat 5. Therefore, the portion of the rear end surface of the first valve portion 3B that overlaps the opening 5A of the valve seat 5 in the radial direction of the valve element 3 functions as the receiving surface B.

In addition to constructing the receiving surface B as a surface orthogonal to the moving direction of the valve body 3, as shown in FIG. 11, the receiving surface B intersects the moving direction of the valve body 3, In other words, the inner surface of the valve element 3 may be inclined to the valve seat 5 side. Further, the first valve portion 3B is constructed by externally fitting the packing 23 on the valve body 3, but as shown in FIG. 11, the first valve portion 3B and the second valve portion 3C are integrally formed. You may. In addition to the manual operation of the valve body 3, an electromagnetic solenoid or the like for operating the valve body 3 by an electric force is provided, and a switch for operating the electromagnetic solenoid is provided or the operation lever 19 is provided. Alternatively, an electromagnetic solenoid or the like that operates to reduce the manual operation force in association with the manual operation of the operation lever 19 may be provided.

FIG. 5 shows a ceiling-mounted fire hydrant in which the valve A is arranged. This is a donut-type hose storage case in which a fire hose 9 is installed in a floor slab 8 that divides the upper and lower floors. 10 is suspended and supported, and the valve A is connected to the tip of the first pipe 11 on the fire-fighting water delivery side, and the discharge side of the valve A and the fire hose 9 are connected by a second pipe 12. Has been done.

As shown in FIGS. 3, 4 and 8, an opening / closing door 13 which is swingably openable / closable about a horizontal axis is attached to the lower surface of the hose storage case 10, and the free end portion of the opening / closing door 13 is attached. The magnet 14 that attracts the metal piece 14a provided in the hose storage case 10 is attached, and the cylinder tube side of the cylinder 15 that presses the opening / closing door 13 downward is connected to the lower end of the second pipe 12 on the hose attachment side. Since the water sent out through the first pipe 11 is supplied to the second pipe 12 through the valve A, the rod 15a of the cylinder 15 projects downward and pushes the open / close door 13 downward to open / close the open / close door. Hose storage case 1 until the magnet side of 13 is in a state where the attracting action of the magnet 14 does not reach
Separate from 0. As a result, the open / close door 13 swings to the open side by its own weight and is positioned in the open posture shown in FIG. 8 through the opening 16a formed in the ceiling plate 16. When the opening / closing door 13 is opened, the cord body 17 attached to the tip of the fire hose 9 hangs downward due to its own weight, and by pulling the grip portion 17a at the tip of the cord body 17, The nozzle 9a of the fire hose 9 held by the holding holder 18 of the hose storage case 10 is pulled down to a lower position where it can be reached.

As shown in FIGS. 5 to 7, an operation lever 19 for operating the valve A is attached to a fire hydrant operation box 21 fixed to a side wall 20 so as to be swingable.
By connecting the valve A and the operating lever 19 with the wire 22 as described above, the operating lever 19 is oscillated from the horizontal posture shown by the solid line in FIGS. 6 and 7 to the vertical posture shown by the phantom line. The inner wire 22a of the wire 22 is pulled so that the valve A can be switched.

Next, a method of using the ceiling-mounted fire hydrant will be described. Assuming that a fire has occurred, first, the operation lever 19 of the fire hydrant operation box 21 is rocked downward to pull the inner wire 22a. Then, the operating shaft 3a of the valve body 3 is pulled and operated,
The valve body 3 is switched to the outflow state. As a result, the water in the first pipe 11 flows into the fire hose 9 through the second pipe 12, and at the same time, the water also flows into the cylinder 15.
The rod 15a of the cylinder 15 projects. The rod 15a presses the back surface of the open / close door 13 to swing the open / close door 13 to the open side to a position where the attraction force of the magnet 14 does not reach. After that, the open / close door 13 further swings to the open side by its own weight and is positioned at the open position shown in FIG. The opening of the opening / closing door 13 causes the string 17 to drop by its own weight downward from the ceiling surface. The grip 17 at the lower end of the cord 17
By grasping a and pulling it downward, the nozzle 9a held by the holding holder 18 is removed and dropped, and the fire hose 9 is fed out with this nozzle 9a, and the fire extinguishing activity is performed toward the fire site. .

When the fire is extinguished, the fire hydrant operation box 2
The operation lever 19 of No. 1 is returned to the initial horizontal posture, and the valve A is switched to the closed state. Then, after pushing up the rod 15a of the cylinder 15 by hand, the fire hose 9 is stored in the hose storage case 10. After the nozzle 9a is held by the holding holder 18, the opening / closing door 13 is closed to hold the opening / closing door 13 in the closed position by the magnetic action of the magnet 14.

The valve A is used not only for switching the flow of water but also for switching the flow of oil or air.

[0018]

According to the fluid valve of the present invention as described above, when the operating portion is operated to the side for switching the valve element to the open position by effectively utilizing the fluid pressure of the fluid delivered from the fluid delivery direction. At the time of initial operation for generating a gap between the valve body and the valve seat, a force similar to the conventional force is instantaneously required, and once the gap is generated,
Since the urging force that urges the valve element to the closed position is sharply reduced, it is possible to reduce the operation force on the operation part after that, and when the operation part is a manual operation, the switching operation of the valve element can be performed. In addition to being light, it is possible to reduce the size of the electric device for switching the valve element when the operation section is electrically operated.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a fluid valve.

FIG. 2 is a vertical side view of a fluid valve.

[Figure 3] Vertical sectional view of a ceiling-mounted fire hydrant

FIG. 4 is a vertical cross-sectional view of the ceiling-mounted fire hydrant, partially omitted.

FIG. 5 is a vertical cross-sectional view showing a structure in which a ceiling-mounted fire hydrant and a fire hydrant operation box are linked together.

FIG. 6 is a front view of a fire hydrant operation box.

FIG. 7 is a vertical sectional view showing the internal structure of the fire hydrant operation box.

FIG. 8 is a vertical cross-sectional view showing an open state of an opening / closing door of a ceiling-mounted fire hydrant.

FIG. 9 is a schematic side view of a valve body portion of a fluid valve.

FIG. 10 is a schematic rear view of a valve body portion of a fluid valve.

FIG. 11 is a vertical sectional side view showing another embodiment of the fluid valve.

FIG. 12 is a vertical sectional side view showing a conventional example of a fluid valve.

[Explanation of symbols]

 1 casing 2 fluid passage chamber 3 valve body 3A rod member 3B first valve portion 3C second valve portion 3D passage 3a operation shaft 4 lid 5 valve seat 5A opening 6 spring 7 storage chamber 8 floor slab 9 fire hose 9a nozzle 10 Hose storage case 11 First piping 12 Second piping 13 Open / close door 14 Magnet 14a Metal piece 15 Cylinder 15a Rod 16 Ceiling plate 17 String 17a Grip 18 Clamping holder 19 Operating lever 20 Side wall 21 Fire hydrant operating box 22 Wire 22a Inner wire 23 Packing A Valve B Receiving surface E Diameter F Diameter G Diameter X Fluid delivery direction Y Fluid discharge direction Z Arrow

Claims (5)

[Claims] 1. A rod-shaped valve of a valve for providing a valve for switching between a shut-off state for shutting off a flow of a fluid and an outflow state for letting out a fluid in a fluid path and holding the valve on the shut-off state side. Provide a spring that urges the body to the closed position,
A fluid valve comprising a storage chamber for storing the spring separately from the fluid passage chamber of the valve, and an operation section for operating the valve element in an open position against the biasing force of the spring. The valve body is composed of a first valve portion located on the valve seat side front end side and a second valve portion located rearward of the first valve portion and having a smaller diameter than the first valve portion, First
A receiving surface for receiving a fluid of the fluid in the fluid passage chamber located behind the first valve portion is formed at a rear end portion of the valve portion, and the valve body is provided with an opening operation thereof. A fluid valve that forms a passage that connects the storage chamber and the fluid passage chamber. 2. The diameter of the opening portion of the valve seat is smaller than the diameter of the first valve portion, and the diameter of the second valve portion is smaller than the diameter of the opening portion of the valve seat. The fluid valve according to claim 1, which is configured. 3. The fluid valve according to claim 1, wherein the receiving surface is a surface orthogonal to the moving direction of the valve body. 4. The fluid valve according to claim 1, wherein the valve is provided in a pipe of a fire hydrant installed on a ceiling. 5. The fluid valve according to claim 1, wherein the operating portion is manually operated.