JPH10159991A - Valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the cutting process of the valve body of a valve for its reduced working costs and resultantly for the rapid manufacturing of the whole valve at reduced costs, and prevent the adiabatic compression of the valve at its gas release. SOLUTION: A valve body 1 is formed with a valve system mount hole 8 of a straight circular hole. A valve element holder 12 is closely fitted in the valve system mount hole 8 and a valve system is arranged inside the valve element holder 12. Preferably, a gas flow hole 14 is formed beneath the valve element holder 12 so as to communicate with a gas induction hole 11 formed through the valve body 1, and the gas flow hole 14 is made to branch into a plurality of radial branch holes 15 so as to open on a peripheral groove 13 formed in the outer periphery of the valve element holder 12 or in the inner periphery of the valve system mount hole 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve, and more particularly to a valve as a container valve attached to a portable or hospital oxygen cylinder used in home oxygen therapy or assisted respiration.

[0002]

2. Description of the Related Art Generally, the above-mentioned valve has a structure shown in FIG. 6 (for example, Japanese Utility Model Laid-Open No. 6-6400).
No. 0). The figure shows the upper half, in which 51 is a valve body, on which a valve mechanism installation hole 52 for incorporating a valve mechanism is formed. A seat receiving portion 54 is formed at the bottom of the valve mechanism installation hole 52 with which the sheet 53 of the valve body contacts, and a spring receiving step 55 and a push rod guide receiving step 56 are provided on the inner surface. It is formed.

In the conventional valve described above, when forming the valve mechanism installation hole 52 in the valve body 51, there is a trouble that a sheet receiving portion 54 and two step portions 55 and 56 must be formed. There are many separate processing steps and the processing cost is high. Further, in the conventional valve, since no special consideration is given to gas delivery to the gas delivery hole 57 formed in the side surface of the valve body 51, so-called adiabatic compression cannot be prevented.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the conventional valve.
Cutting of the valve body is easy and the processing cost can be kept low, so that the entire valve can be manufactured more quickly and at lower cost, and adiabatic compression during gas delivery is prevented. An object of the present invention is to provide a valve that can perform the operation.

[0005]

According to the present invention, a valve mechanism installation hole in a valve body is formed as a straight circular hole, and a valve body holder is closely fitted in the valve mechanism installation hole. The above problem has been solved by a valve having a valve mechanism incorporated in a holder. Preferably, at a lower portion of the valve body holder,
A gas flow hole communicating with the gas introduction hole of the valve body is provided, and a plurality of flow distribution holes are radially arranged in communication with the gas flow hole, and each of the flow distribution holes is provided with the valve body holder.
To the peripheral groove formed on the outer peripheral surface or the inner peripheral surface of the valve mechanism installation hole.

[0006]

Embodiments of the present invention will be described with reference to the accompanying drawings. First, the embodiment shown in FIGS. 1 to 4 will be described. FIG. 1 is a front view of a valve according to the present invention, FIG. 2 is a longitudinal sectional view thereof, and 1 is a valve body (valve box), 2
Denotes a handle rotatably installed on the upper part of the valve body 1. The valve body 1 has a male screw portion 3 for screwing a gas cylinder at a lower end portion, a gas delivery hole 4, a positioning hole 5 and a pressure gauge mounting hole 6 formed on a side surface, and a safety valve plug 7 screwed into the valve body. It is. In the positioning hole 5, a positioning pin projecting from a flow controller (not shown) attached to the valve body 1 is inserted. Further, a gas inflow passage protruding from the flow regulator is fitted into the gas delivery hole 4.

The valve body 1 is provided with a valve mechanism installation hole 8 from above.
Is drilled. The valve mechanism installation hole 8 is not a conventional stepped one, but may be a straight circular hole up to the inner bottom. Therefore, the grinding of the valve body 1 is greatly simplified, and mass production by an automatic processing machine becomes possible. At the upper end of the valve mechanism installation hole 8, a female thread portion 10 for screwing the ground nut 9 of the handle 2 is formed, and from the center of the inner bottom of the valve mechanism installation hole 8 to the lower end surface of the valve body 1. A gas introduction hole 11 is formed to pass therethrough.

A valve body holder 12 is tightly fitted in the valve mechanism installation hole 8 in contact with its inner bottom. FIG. 3 shows the valve body holder-12.
Has a wide peripheral groove 13 in the lower peripheral surface as shown in FIG.
There, a plurality of distribution holes 15 radially branched from an upper end wide-diameter portion 14a of a gas flow hole 14 formed from the bottom surface.
Openings are arranged. The circumferential groove 13 is provided at a position communicating with the gas delivery hole 4, so that the gas flowing into the gas flow hole 14 from the gas introduction hole 11 is diverted into the flow branch hole 15, It passes through the gas delivery hole 4. The circumferential groove 13 may be formed on the inner surface of the valve body 1 (see FIG. 5 described later).

The branch hole 15 may be expanded outward in a horn shape (see FIG. 4). In such a case, the flow velocity of the gas flowing therethrough gradually decreases, so that the effect of preventing adiabatic compression is promoted. Valve body holder-12
An O-ring fitting groove 16 is formed on the bottom surface of the. A kelp 18 around which a spring 17 is wound is slidably fitted into the upper half cylindrical portion of the valve body holder 12. Kerep 1
In the lower end cylindrical portion 8, there is provided a sheet 19 which closes and closes the outlet of the gas flow hole 14 by operating the handle 2.
Is deployed. The spring 17 always acts to push up the kelp 18 so that its upper surface contacts the push rod 21.

A push rod guide 20 is inserted into the valve mechanism installation hole 8 and abuts on the upper surface of the valve body holder 12.
Is deployed. The push rod 21 is normally sealed with an O-ring arranged in two stages, and does not move up and down unless a certain amount of force is applied. Reference numeral 22 denotes an O-ring receiver arranged on the upper surface of the push rod guide 20, and exposes the upper end of the push rod 21 from the center thereof.
The lower end surface of the ground nut 9 contacts the upper surface of the O-ring receiver 22.

Reference numeral 23 denotes a spindle fixed to the handle 2 by a handle fixing nut 24. The spindle 23 rotates integrally with the handle 2 as the handle 2 rotates. The spindle 23 is slidably inserted through the ground nut 9, and a male screw part 25 screwed to a female screw part in the lower half of the ground nut 9 is formed below the spindle 23, and a pressing pin at the center of the male screw part 25 is formed. The abutment 26 contacts the head of the push rod 21. Therefore, when the handle 2 is rotated, the spindle 23 rotates following the rotation of the handle 2, and the spindle 23 moves up and down with the rotation because the male screw portion 25 is screwed into the female screw portion of the ground nut 9. Becomes

When the spindle 23 is lowered, the kerep 18 is pushed down via the push rod 21 against the pushing force of the spring 17, and the upper end wide-diameter portion 1 of the gas flow hole 14 is moved.
When the handle 4 is gradually narrowed and the handle 2 is further rotated, the sheet 19 comes into close contact with the outlet of the gas flow hole 14 and the gas flow hole 14 is completely closed, so that the gas delivery hole 4 is closed. The gas supply to is cut off. When the handle 2 is rotated in the reverse direction, the pushing state of the push rod 21 by the spindle 23 (the pushing piece 26) is released. However, the push rod 21 is pushed up by the pushing force of the spring 17, so that the pushing piece 26 Press the peak without leaving
And rises together with the In addition, a display serving as a guideline for the opening / closing operation of the gas flow hole 14 is appropriately expressed on the peripheral surface of the upper end portion of the valve body 1 and the peripheral surface of the lower end portion of the handle 2 (see FIG. 1).

As described above, in the valve according to the present invention, the valve seat is configured to be separated from the valve body 1 as the valve body holder 12. Therefore, the valve body 1
It is no longer necessary to form a step on the inner surface of the valve mechanism installation hole 8 as in the prior art, so that the processing of the valve body 1 is simplified and the manufacturing cost can be considerably reduced.

Further, since the valve element holder 12 is an independent part, machining accuracy can be improved, and machining such as piercing is easy. Therefore, the valve element holder 12 in the present invention has a plurality of parts. Are formed radially, and each of the flow dividing holes 15 is opened in a circumferential groove 13 formed on the peripheral surface of the valve element holder 12. Thus, the gas supplied from the gas flow hole 14 to the gas delivery hole 4 is once diverted to the distribution hole 15 and is supplied to the gas delivery hole 4 around the circumferential groove 13. The rise in gas pressure slowed down, which made it possible to prevent adiabatic compression during valve opening. When the branch hole 15 is expanded outward, the adiabatic compression prevention effect is further promoted.

The embodiment shown in FIG. 5 is a modification of the above embodiment in which the kelp 18 and the push rod 21 and a part of the valve body 1 and the valve body holder 12 are changed. Since the configuration is the same as that of the embodiment, the description of that portion will be omitted, and only the changed points will be described.

In the valve body holder 30 of this embodiment, a plurality of flow dividing holes 31 corresponding to the flow dividing holes 15 are formed in the peripheral wall, and a circumferential groove 32 communicating with each of the flow dividing holes 31 is formed in the valve body 1 side. ing. Also in this case, the circumferential groove 32
It may be formed on the valve element holder-30 side as shown in FIG.

In this case, the push rod 33 and the kerep 3
4 is integrally formed. A circular sheet fitting groove 35 is formed on the bottom surface of the kelep 34, and a donut-shaped sheet 36 is fitted therein. The center of the fitting groove 35 projects slightly from the bottom surface so that the plug 3 can be fitted into the gas flow hole 14.
The lower end of the plug 37 is tapered. 38
Is a spring interposed between the valve body holder 30 and the push rod guide 20, and constantly applies a pressing force to the kelp 34.

The head surface of the push rod 33 is a kerep 3
4 is pushed up by the gas pressure as long as the gas pressure from the gas flow hole 14 exceeds the urging force of the spring 38.
6 comes into pressure contact. Therefore, the gas flow holes 1 shown in FIG.
(4) When the spindle 23 is raised from the closed state, if the gas pressure exceeds the above, the push rod 33 and the kelp 34 are raised accordingly, and the closed state of the gas flow hole 14 by the sheet 36 is released. When the gas is opened, the gas supplied from the gas flow holes 14 flows out of the respective distribution holes 31 into the circumferential groove 32, and is sent out from the gas delivery holes 4 to the flow controller around the circumferential groove 32.

By rotating the handle 2 in the reverse direction, the spindle 23
Is lowered, the kelp 18 integrated with the push rod 21 is pushed down, and the sheet 36 is moved to the gas flow hole 1.
The gas flow hole 14 is closed when it comes into close contact with 4.

Whether or not the gas flow hole 14 is closed by the sheet 36 of the kelep 34 is determined by bringing the sheet 36 into close contact with the gas flow hole 14 except when the handle 2 is closed. It is determined by the urging force of the spring 38 to be made and the strength of the gas pressure from the gas flow hole 14. That is, while the urging force of the spring 38 is losing the gas pressure, it is in the open state, and while the urging force of the spring 38 is winning, it is in the closed state. Even in this closed state, a certain amount of gas remains in the gas cylinder. In the present invention, the gas is intentionally left in the gas cylinder in this manner (for example, about 2 kgf / cm ² ; this value can be arbitrarily set by adjusting the spring pressure). The inside of the gas cylinder is kept clean by suppressing the inflow of outside air into the inside.

Further, since the push rod 33 is strongly sealed by the O-ring and the sliding resistance is large, and the sheet 36 is urged by the spring 38, the opening is sharp when the valve is opened. And adiabatic compression is consequently prevented.

As described above, when the pressing force of the spring 38 loses the gas pressure, the sheet 36 separates from the gas pressure and opens the gas flow hole 14, but at this time, it fits into the gas flow hole 14. The plug portion 37 which has been removed gradually comes out of the plug portion 37, and since the lower end portion of the plug portion 37 is tapered, the opening area gradually increases. Thereby, it is possible to effectively prevent adiabatic compression that may be caused by opening at once.

Gas is charged into the gas cylinder from the gas delivery hole 4. In this case, if the spindle 23 is raised by operating the handle 2, the gas pressure of the gas to be charged is reduced by the pressing force of the spring 38. To push up the kerep 34, the gas flow hole 14 is sufficiently opened, and the gas can be charged into the gas cylinder.

[0024]

As described above, the present invention has a structure in which the valve seat is separated from the valve body as a valve body holder, so that the processing of the valve body becomes very easy and the valve body is manufactured at low cost. It is possible to reduce the product cost, and to provide a diverting hole in the valve body holder and send the gas around the circumferential groove, thereby effectively preventing adiabatic compression. Became possible. Also, the valve does not open rapidly due to the diversion hole being expanded outward and the sliding resistance of the O-ring against the push rod due to the high pressure seal becomes large, thereby causing adiabatic compression. Has the effect of preventing

According to the fourth aspect of the present invention, furthermore, the gas pressure in the gas cylinder is limited to a certain degree due to the relationship between the spring pressure for closing the gas flow hole in the valve body holder and the gas pressure for opening the gas flow hole. It is possible to leave gas
This has the effect of preventing the flow of outside air into the gas cylinder and maintaining a clean state. Further, the sheet is made into a donut shape and fitted to the gas flow hole at the center thereof. By providing a plug having a tapered tip so that the opening area gradually increases at the time of initial valve opening, there is an effect that adiabatic compression can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view of a valve according to the present invention.

FIG. 2 is a longitudinal sectional view of a valve according to the present invention.

FIG. 3 is a partial sectional view showing an example of a shape of a valve body holder in the valve according to the present invention.

FIG. 4 is a sectional view showing another example of the shape of the valve element holder in the valve according to the present invention.

FIG. 5 is a longitudinal sectional view showing another embodiment of the valve according to the present invention.

FIG. 6 is a longitudinal sectional view showing a shape example of a conventional valve.

[Explanation of symbols]

 1 Valve body 2 Handle 4 Gas delivery hole 8 Valve mechanism installation hole 9 Gland nut 10 Female thread 11 Gas introduction hole 12 Valve holder 13 Peripheral groove 14 Gas flow hole 15 Split flow hole 17 Spring 18 Kerep 19 Sheet 20 Push Rod guide 21 Push rod 22 O-ring receptacle 23 Spindle 30 Valve holder 31 Dividing hole 32 Peripheral groove 33 Push rod 34 Kerep 36 Sheet 37 Plug 38 Valve holder

Claims (5)

[Claims] A valve mechanism installation hole in a valve body is a straight circular hole, and a valve body holder is provided in the valve mechanism installation hole.
A valve mechanism in which a valve mechanism is incorporated in the valve body holder by tightly fitting. 2. The valve body holder has a gas flow hole at a lower portion thereof communicating with a gas introduction hole of the valve body, and a plurality of distribution holes radially arranged in communication with the gas flow hole. The valve according to claim 1, wherein each of the branch holes is opened toward a peripheral groove formed on an outer peripheral surface of the valve element holder or an inner peripheral surface of the valve mechanism installation hole. 3. The valve according to claim 2, wherein the branch hole is gradually expanded outward. 4. A spring that is slidably incorporated in the valve body holder and forms a valve mechanism and a push rod are integrally formed, and a spring that constantly applies a pressing force to the kerep on an upper surface of the kerep. 3. The valve according to claim 1, further comprising: a valve; and a plug portion formed by projecting a central portion of a bottom surface of the kelp, and a sheet for closing a gas flow hole is provided so as to surround the plug portion. 5. The valve according to claim 4, wherein a taper portion is provided at a lower end of the plug portion.