JP3973883B2 - Degassing valve with safety valve for dispenser washing barrel - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a vent valve with a safety valve that is used by being attached to a dispenser cleaning barrel.
[Prior art]
[0002]
The dispenser that dispenses beverages such as draft beer is usually washed after the day's use is finished to remove beverages such as beer remaining in the hose and coil. As shown in FIG. 1, the cleaning of such a dispenser is usually performed by connecting a cleaning barrel a filled with water as a cleaning liquid to a conduit c of the dispenser b and connecting the cleaning barrel to a carbon dioxide gas cylinder d. The inside is pressurized with carbon dioxide gas (for example, a pressure of about 0.25 MPa (2.5 kg / cm ² ) to about 0.4 MPa (4 kg / cm ² )) and the cleaning liquid is forced to flow into the conduit c of the dispenser. In general, a method of discharging and washing a beverage remaining inside the conduit is generally used. In this method, after the cleaning is completed, the degassing valve 1 attached to the cleaning barrel a is manually operated to degas the cleaning barrel.
[0003]
As shown in FIG. 2, the gas vent valve 1 conventionally attached to the cleaning barrel includes a valve body 2 that is attached to the cleaning barrel a and has a through hole formed therein. A spindle 5 movably disposed in the hole; and a spring 6 that presses the spindle 5 so that a seal ring 7 attached to the spindle 5 engages with a valve seat of the valve body 2. The seal ring 7 is separated from the valve seat by pushing the end (upper end in FIG. 2) against the spring, thereby allowing the gas in the cleaning barrel to escape through the valve body radially from the through hole and the through hole. It escapes through port 8.
[Problems to be solved by the invention]
[0004]
By the way, the washing barrel pressurized with gas is designed to sufficiently withstand the working pressure in consideration of the space limitation of the installation location, ease of handling, etc., but the strength is naturally limited. . For example, if the internal pressure extremely exceeds the pressure resistance of the cleaning barrel during the cleaning operation, the cleaning barrel may be in a very dangerous state. In particular, since the dispenser is cleaned every day, the cleaning barrel is used every day, and if it is used for a long period of time, the cleaning barrel is fatigued due to repeated pressurization and non-pressurization. There is a risk of coming. Furthermore, since the pressure of the gas supplied from the gas cylinder to the cleaning barrel is manually adjusted, there is a possibility that a high pressure may be supplied due to an error. Also, since the operation of extracting the gas in the cleaning barrel is performed manually, forgetting the operation of extracting the gas in the cleaning barrel after completion of the cleaning operation, and as a result, gas pressure is applied to the cleaning barrel for a long time. Sometimes.
However, since the conventional degassing valve is configured to operate only when the spindle is pushed from the outside of the cleaning barrel, the internal gas is automatically released regardless of how much the internal pressure of the cleaning barrel increases. However, if the gas pressure in the cleaning barrel is inadvertently increased, or if the gas pressure is continuously applied to the cleaning barrel for a long time, the barrel may be damaged.
[0005]
The present invention has been made in view of the problems of the conventional degassing valve for a cleaning barrel as described above, and in addition to the function of releasing the internal gas when the spindle is pushed from the outside of the cleaning barrel, It is an object of the present invention to provide a degassing valve having a function as a safety valve capable of automatically releasing the gas to the outside when the pressure in the barrel becomes a predetermined value or more.
Another object of the present invention is to provide a degassing valve that can operate reliably as a safety valve with a compact structure for a washing barrel with limited space.
[0006]
[Means for Solving the Problems]
The invention of the present application is a gas vent valve with a safety valve that is used by being attached to a dispenser cleaning barrel.
A valve body having one end connected to the cleaning barrel and having a through-hole and a first valve seat formed in the hole;
A holding member attached to the other end of the valve body;
A cylindrical valve body that is movably disposed in a hole of the valve body and opens and closes a first fluid passage formed between the valve body and the first valve seat;
A second body formed between the valve body in cooperation with a second valve seat formed in the valve body and relatively movable in the through hole of the valve body and the pressing member . A spindle that opens and closes the fluid path;
A spring that presses the valve body to close the first fluid passage in cooperation with the first valve seat;
It is comprised so that the said spindle can be pressed .
As a result, in addition to releasing the internal gas when the spindle is pushed from the outside of the cleaning barrel, it is possible to automatically release the gas to the outside when the pressure in the cleaning barrel exceeds a predetermined level. . In addition, the compact structure enables reliable operation as a safety valve.
Further, in the gas vent valve with a safety valve described above, the gas vent valve may include a seal member that is provided on an outer periphery of the valve body and sealingly engages the first valve seat and the valve body, or The valve body may be formed of a synthetic resin material, and the valve body may be formed with a tapered surface that is sealingly engaged with the first valve seat. Accordingly, the first valve seat and the valve body can be reliably sealed while maintaining a compact structure, and gas leakage to the outside when the pressure in the cleaning barrel is less than a predetermined value can be prevented.
Further, in the gas vent valve with a safety valve, the spring is disposed between the valve body and a spring receiver attached to the spindle, and an outer periphery of the spring receiver is formed on a shoulder portion formed on an inner periphery of the pressing member; The spring may be disposed between the valve body and the spindle, and an outer periphery of a spring receiving portion of the spindle may protrude radially outward from the other portion, and the pressing member It may be possible to engage with a shoulder portion formed on the inner periphery of the. As a result, the spring can be pressed in a pressed state without increasing the number of parts, and the gas vent valve with a safety valve can be made more compact.
Furthermore, in the gas vent valve with a safety valve, the valve body and the spindle may be integrally moved relative to the valve body when the pressure in the cleaning barrel reaches a desired pressure. Alternatively, the valve body may move relative to the valve body when the pressure in the cleaning barrel reaches a desired pressure. Further, an O-ring seal that is elastically pressed against a second valve seat formed on the valve body may be attached to the spindle.
[0007]
A vent valve with a safety valve for a dispenser washing barrel according to another invention of the present application includes a valve body having a through-hole and a first valve seat formed in the hole;
A holding member attached to an end of the valve body;
A cylindrical valve body that is movably disposed in a hole of the valve body and opens and closes a first fluid passage formed between the valve body and the first valve seat;
A spindle that is relatively movably disposed within the valve body and the through hole of the pressing member, and that opens and closes a second fluid passage formed between the valve body;
A spring that presses the valve body so as to close the first fluid passage;
It is comprised so that the said spindle can be pressed .
In the above vent valve with a safety valve, the valve body and the spindle may move together relative to the valve body when the pressure in the cleaning barrel reaches a desired pressure, or the cleaning valve The valve body may move relative to the valve body when the pressure in the barrel reaches a desired pressure. Further, an O-ring seal that is elastically pressed against a second valve seat formed on the valve body may be attached to the spindle.
[0008]
【Example】
Hereinafter, an embodiment of a gas vent valve with a safety valve for a washing barrel for a dispenser according to the present invention will be described with reference to FIG.
A gas vent valve (hereinafter simply referred to as a gas vent valve) 10 with a safety valve according to this embodiment is formed at one end (lower end in the figure) and has a male screw 21 screwed into a screw hole of a cleaning barrel, and penetrates in a longitudinal direction. A valve body 20 having a stepped hole 22 and an internal thread 23 formed at the opening of the other end (upper end in the figure) of the stepped hole 22, and movable within the stepped hole 22 of the valve body 20 with respect to the valve body. The cylindrical valve body 30 disposed, the annular pressing member 40 screwed into the female screw 23 of the valve body, the spindle 50 disposed in the valve body 30 and the pressing member 40, the valve body 30 and the spindle 50 And a spring 60 disposed therebetween.
[0009]
The valve body 20 is made of, for example, a metal having corrosion resistance such as brass or stainless steel. In the stepped hole 22, an annular valve seat (a first valve seat is provided at a substantially central position in the longitudinal direction of the valve body. The stepped hole 22 is divided into a large diameter portion 26 and a small diameter portion 27 with the valve seat 24 as a boundary. The valve body 20 is preferably made of metal in order to ensure a relatively thin wall and high strength, but may be made of a synthetic resin material. An annular groove 25 for an O-ring seal is also formed on the end surface of the valve body on the male screw 21 side. The valve body 30 is also made of a metal having corrosion resistance (for example, brass, stainless steel, etc.) in the same manner as the valve body 20, and has a large diameter portion corresponding to the large diameter portion 26 and the small diameter portion 27 of the stepped hole 22. 36 and a small diameter portion 37. A through hole 32 formed in the valve body 30 is also a stepped hole, and a valve seat (second valve seat) 34 is formed in the center. The valve body 20 is further formed with at least one (four in this embodiment) relief ports 28 extending in the radial direction from the large-diameter portion 26 of the stepped hole 22 in a circumferential direction.
[0010]
The holding member 40 has an annular or cylindrical structure so as to define a through hole 42, and a male screw 43 that is screwed into the female screw 23 of the valve body 20 is formed at one end (lower end in FIG. 3). ing. A shoulder 44 is formed in the through hole 42. The spindle 50 is also made of the same material as the valve body, and has a large diameter portion 51 slidably received in the through hole 42 of the pressing member 40 and a small diameter received in the through hole 32 of the valve body 30. Part 52. A shoulder portion 53 is formed between the small diameter portion 52 and the large diameter portion 51. A spring receiver 80 is attached to the large diameter portion 51 adjacent to the shoulder portion 53. The outer diameter of the spring receiver 80 is larger than the outer diameter of the large diameter portion 51, and engages with a shoulder portion 44 formed in the through hole 42 of the pressing member 40. The spring 60 is a coil spring, and is arranged between the valve main body 30 and the large diameter portion 51 of the spindle 50 on the outer periphery of the small diameter portion 52 of the spindle, and one end (upper end in the figure) contacts the spring receiver 80. The other end is in contact with a spring seat formed on the valve body 30. An O-ring seal 71 made of an elastomer material is disposed on the outer periphery of the small diameter portion 37 of the valve body 30 at a position close to the large diameter portion side. The O-ring seal is pressed against the valve seat 24 by the valve body 30 so as to close a fluid passage formed between the valve body 20 and the valve body 30. An O-ring seal 72 made of an elastomer material is also attached to the distal end (lower end in the drawing) of the small diameter portion 52 of the spindle 50 and is held at that position by a clasp 56 fitted to the small diameter portion 52. In the assembled state of the degassing valve shown in FIG. 3, the spring is in a pre-compressed state, and the O-ring seal 71 attached to the valve body 30 is operated by the valve body by the action of the spring 60. The seat 24 is pressed down. On the other hand, the O-ring seal 72 attached to the spindle is elastically pressed against the valve seat 34 formed on the valve body 30 by the pressure in the cleaning barrel. The spring force in the assembled state is such that when the pressure in the cleaning barrel reaches a desired pressure, for example, about 0.25 MPa (2.5 kg / cm ² ) to about 0.4 MPa (4 kg / cm ² ), It is set in consideration of the inner diameter of the small-diameter portion 27 of the valve main body 20 so that the spindle 50 moves relative to the valve body 20 and the O-ring seal 71 is separated from the valve seat.
[0011]
The degassing valve 10 is attached to the cleaning barrel by screwing the male screw 21 into the threaded hole of the cleaning barrel. When the gas pressure in the cleaning barrel exceeds the set value of the spring when the cleaning barrel is used, the valve body 30 and the spindle 50 are integrated against the pressing force of the spring 60 toward the pressing member 40. The O-ring seal 71 moves away from the valve seat 24. For this reason, the gas in the cleaning barrel flows into the large-diameter portion 26 of the stepped hole 22 through the annular fluid passage 91 formed between the valve body 30 and the valve body 20, and is formed in the valve body 20 therefrom. It flows out of the valve body 20 through the relief port 28 (function as a safety valve). On the other hand, when degassing the cleaning barrel after cleaning the dispenser using the cleaning barrel, when the outer end of the spindle 50 (the upper end in FIG. 3) is pushed, the O-ring seal 72 attached to the spindle 50 is It leaves | separates from the valve seat 34 formed in the valve body 30. FIG. For this reason, the gas in the cleaning barrel flows into the large-diameter portion 26 of the stepped hole 22 through the annular fluid passage 92 formed between the valve body 30 and the small-diameter portion 32 of the spindle 50, and escapes from there through the port 28. Through the valve body 20 (function as a gas vent valve).
[0012]
In FIG. 4, a vent valve according to another embodiment of the present invention is shown at 10a. In the degassing valve 10a of this embodiment, the spring receiver 80 provided in the degassing valve of the above embodiment is omitted, and instead the outer periphery of the end of the large-diameter portion 51a (end on the small-diameter portion side) of the spindle 50a. An annular protrusion 56 a is formed on the upper surface of the holding member 40, and the protrusion engages with the shoulder 44 of the pressing member 40. In this embodiment, the valve body 30a is made of a synthetic resin material such as tetrafluoride resin, and the O-ring seal 71 of the above embodiment is omitted. For this purpose, a tapered surface 38a is formed between the large-diameter portion 36a and the small-diameter portion 37a on the outer periphery of the valve body 30a, and the tapered surface 38a is brought into sealing contact with the valve seat 24 of the valve body 20. . Since the other structure is the same as that of the above embodiment, the corresponding components are denoted by the same reference numerals and the description thereof is omitted. Moreover, since the function as a safety valve of a gas vent valve and the function as a gas vent valve are the same, description is abbreviate | omitted. Further, instead of the O-ring seal 72 attached to the spindle 50a, a metal annular member is sealed and fixed to the spindle 50a, and the annular member and the valve seat 34a formed on the valve body 30a are sealed. You may make it match.
[0013]
【The invention's effect】
According to the vent valve with a safety valve of the present invention, the following effects can be obtained.
(1) Functions as a safety valve that automatically releases the gas when the pressure in the cleaning barrel exceeds a predetermined level by releasing the internal gas when the spindle is pushed from the outside of the cleaning barrel. Therefore, the washing barrel can be prevented from being damaged by the gas pressure.
(2) Since the structure of the gas vent valve with a safety valve can be made compact, it can be easily installed in a limited space.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining a method of cleaning a dispenser using a cleaning barrel.
FIG. 2 is a cross-sectional view of a conventional gas vent valve.
FIG. 3 is a cross-sectional view of an embodiment of a vent valve with a safety valve according to the present invention.
FIG. 4 is a cross-sectional view of another embodiment of a vent valve with a safety valve according to the present invention.
[Explanation of symbols]
10 Degassing valve with safety valve 20 Valve body 22 Stepped hole 24 Valve seat (first valve seat)
30, 30a Valve body 32, 32a Through hole 34, 34a Valve seat (second valve seat)
40 Holding member 50, 50a Spindle 60 Spring 71, 72 O-ring seal 80 Spring receiver

Claims (12)

In the gas vent valve with safety valve attached to the dispenser cleaning barrel,
A valve body having one end connected to the cleaning barrel and having a through-hole and a first valve seat formed in the hole;
A holding member attached to the other end of the valve body;
A cylindrical valve body that is movably disposed in a hole of the valve body and opens and closes a first fluid passage formed between the valve body and the first valve seat;
A second body formed between the valve body in cooperation with a second valve seat formed in the valve body and relatively movable in the through hole of the valve body and the pressing member . A spindle that opens and closes the fluid path;
A spring that presses the valve body to close the first fluid passage in cooperation with the first valve seat;
A vent valve with a safety valve capable of pressing the spindle . The vent valve with a safety valve according to claim 1,
A gas vent valve with a safety valve provided on the outer periphery of the valve body and including a seal member that sealingly engages the first valve seat and the valve body. The vent valve with a safety valve according to claim 1,
A vent valve with a safety valve, wherein the valve body is formed of a synthetic resin material, and the valve body is formed with a tapered surface that sealingly engages with the first valve seat. In the vent valve with a safety valve in any one of Claim 1 thru | or 3,
The spring is disposed between the valve body and a spring receiver attached to the spindle;
A vent valve with a safety valve in which an outer periphery of the spring receiver is engageable with a shoulder portion formed on an inner periphery of the pressing member. In the vent valve with a safety valve in any one of Claim 1 thru | or 3,
The spring is disposed between the valve body and the spindle;
A vent valve with a safety valve in which an outer periphery of a spring receiving portion of the spindle protrudes radially outward from other portions and is engageable with a shoulder portion formed on an inner periphery of the pressing member.   6. The vent valve with a safety valve according to claim 1, wherein the valve body and the spindle move together relative to the valve body when the pressure in the cleaning barrel reaches a desired pressure. Degassing valve with safety valve. 6. The vent valve with a safety valve according to claim 1, wherein the valve body moves relative to the valve body when the pressure in the washing barrel reaches a desired pressure. With vent valve. In the safety valve with venting valve according to any one of claims 1 to 7, in the spindle, the second safety valve with venting O-ring seals repression is attached to a valve seat formed in the valve body valve. A valve body having a through-hole and a first valve seat formed in the hole;
A holding member attached to an end of the valve body;
A cylindrical valve body that is movably disposed in a hole of the valve body and opens and closes a first fluid passage formed between the valve body and the first valve seat;
A spindle that is relatively movably disposed within the valve body and the through hole of the pressing member, and that opens and closes a second fluid passage formed between the valve body;
A spring that presses the valve body so as to close the first fluid passage;
A degassing valve with a safety valve for a dispenser washing barrel capable of pressing the spindle . The degassing valve with a safety valve according to claim 9 , wherein the valve body and the spindle are integrally moved relative to the valve body when the pressure in the cleaning barrel reaches a desired pressure. Gas vent valve with safety valve. The vent valve with a safety valve according to claim 9, wherein the valve body moves relative to the valve body when the pressure in the cleaning barrel reaches a desired pressure. 11. The vent valve with a safety valve according to claim 9 , wherein an O-ring seal that is elastically pressed against a second valve seat formed on the valve body is attached to the spindle. valve.

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