JPH0636385Y2 - Temperature compatible pressure control valve - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Use The present invention relates to improvement of a pressure control valve for pressure-fed carbon dioxide gas used in a draft beer dispenser, a carbonator of a carbonated drink cup server, etc., and particularly, in response to a temperature change of draft beer or a carbonated drink. The present invention relates to a temperature-compatible pressure control valve that automatically corrects the pressure of carbon dioxide and maintains an appropriate pressure at all times.

BACKGROUND ART A draft beer dispenser is configured to send draft beer in a beer barrel under pressure from a carbon dioxide gas cylinder to a flash chiller through a tube line, and to pour it from a server cock into a jug.

When making carbonated drinks with a carbonated drink cup server, the carbonated water obtained by pressure-feeding carbon dioxide from the carbon dioxide cylinder to the drinking water in the carbonator, and a predetermined amount of syrup etc. pressure-fed with carbon dioxide are used. It consists of mixing and pouring into a cup.

In order to maintain the taste of draft beer, carbonated drinking water, and the like, and to maintain a stable pouring, it is necessary to adjust the pressure of carbon dioxide fed under pressure. Generally, if the pressure of carbon dioxide is too low, carbon dioxide from draft beer, etc. If it is separated and the pressure of carbon dioxide is too high, carbon dioxide will dissolve in draft beer, etc.,
In either case, foaming increases when pouring out, impairing the peculiar taste of various beverages.

Moreover, in such draft beer and the like, carbon dioxide gas is more easily separated as the temperature is higher. Therefore, it is necessary to increase the pressure of the carbon dioxide gas as the temperature rises.

For this reason, means for arranging a carbon dioxide gas pressure control valve in a pressure-feeding pipeline connecting the carbon dioxide gas cylinder and a beverage tank such as a beer barrel has been adopted.

However, the pressure control valve used conventionally is usually
The pressure from the carbon dioxide gas cylinder is reduced to the required pressure and the pressure is kept constant, and the pressure is manually adjusted at any time.It is suitable for the temperature change of draft beer as described above. It was extremely inconvenient to adjust the pressure.

In view of the above problems, the present invention makes it possible to automatically adjust the pressure of carbon dioxide gas fed under pressure to an appropriate pressure in response to temperature changes of draft beer, carbonated drinks, etc., and has a simple structure and easy manufacturing. The purpose is to provide a temperature-responsive pressure control valve with a simple structure.

Configuration of the Invention This invention is composed of a plurality of curved bimetals, one of which is opened and the other closed side outer end surface is in contact with a closed inner end surface side in a cylinder having a temperature-sensing portion, and the bending directions are alternately laminated. In the opening of the cylinder that is pressed and stored by the piston member,
The valve body is structured such that the stem for adjusting the opening degree of the valve portion is pressed by a spring on one pressure receiving surface of the built-in diaphragm, and the valve body is integrated by screwing, and the pressing amount of the piston member tip on the other pressure receiving surface of the diaphragm can be adjusted. The temperature-responsive pressure control valve is characterized in that a heat insulating case is disposed in contact with or arranged around the outer peripheral surface of the cylinder other than the temperature sensing portion.

Preferred Embodiment of the Invention Temperature-Compatible Pressure Control Valve of the Invention (hereinafter Pressure Control Valve)
The temperature changes of draft beer, carbonated drinks, etc. are achieved by directly arranging a plurality of curved bimetals in the cylinder, which is the temperature-sensing part, so that the temperature is most easily sensed and the spring force is effectively transmitted. A structure that makes it possible to adjust the opening degree of the valve portion in accordance with the above conditions, and screw-integrates the valve body with the built-in diaphragm and stem into the opening portion of the cylinder to facilitate setting and adjustment of the initial pressure of the pressure control valve. Is.

In the pressure control valve according to the present invention, the outer surface of the cylinder containing the curved bimetal, that is, the temperature-sensing portion can have a smooth surface or a desired shape, so that the temperature-sensing portion can be directly connected to a beverage tank such as a beer barrel or a pressure feeding pipe line. Can be placed in contact with each other. For example, the head of the cup-shaped cylinder is used as the temperature-sensing portion to directly contact the beverage tank such as a beer barrel to improve the responsiveness of pressure adjustment to the temperature change of draft beer or the like. be able to.

For this reason, it is desirable that the cylinder is made of a material having a high thermal conductivity such as aluminum, and it is necessary to provide a heat insulating case made of a low thermal conductivity material on the outer peripheral surface of the cylinder other than the portion that becomes the temperature sensing portion. There is.

The heat insulating case can be in contact with the required part of the outer peripheral surface other than the temperature sensitive part of the cylinder or can be arranged around the entire peripheral surface, and if the other parts can be insulated so that the temperature of the required fluid is concentrated in the temperature sensitive part, the case shape etc. Any configuration can be applied.

As the heat insulating case material, bakelite and synthetic resin such as polypropylene, nylon and polycarbonate are preferable.

Furthermore, by interposing a low thermal conductivity material so that the closed side and the open side of the cylinder are thermally divided, heat diffusion from the temperature sensitive part to each part of the cylinder is prevented, and the sensitivity at the temperature sensitive part is improved. Can be improved.

The specifications of the plurality of curved bimetals forming the pressure control valve of the present invention are appropriately selected according to the pressure-controlled fluid, application, and the like.

For example, in the case of the bimetal of the pressure control valve used in the draft beer dispenser of the embodiment, the high expansion side is arranged on the convex side and the low expansion side is arranged on the concave side, which are processed into a so-called disc spring shape, and are curved to each other. So that the directions alternate
That is, the high-expansion side and the high-expansion side, and the low-expansion side and the low-expansion side are laminated to face each other, and are deformed in the bending direction according to the ambient temperature change, and the valve main body is applied with a predetermined pressure through the piston member. It is configured to press the side diaphragm.
Further, in the case of syrup pressure feeding in the carbonated beverage cup server, the high expansion side and the low expansion side of the bimetal are the opposite configurations to the above configurations.

For accurate pressure control, it is desirable to increase the number of curved bimetals used.However, considering the size of the pressure control valve, the operating temperature range and the type of liquid to be pumped, It is desirable to select the shape size and material.

Further, the piston member that press-stores the curved bimetal in the cylinder and transmits the spring force thereof to the diaphragm has the above-mentioned function, and easily and easily adjusts the spring force by advancing and retracting the cylinder and the valve body. Any configuration can be applied as long as it can be ensured.

As shown in the embodiment, the valve body screw-integrated with the opening of the cylinder has a structure in which the through hole of the valve stem serves as a flow path, and the valve part for closing the flow path is pushed and opened by the stem. As long as the stem that adjusts the opening degree of the valve portion is pressed by the spring on one pressure receiving surface of the built-in diaphragm and the other pressure receiving surface of the diaphragm can be pressed by the piston member such as the push pin on the cylinder side, etc. Any configuration of can be used.

In this invention, the push pin of the piston member is provided with a required reaction force to the bimetal as shown in the embodiment, and has a function of not changing the set pressure even when the pressure control valve is exposed to an extremely low temperature atmosphere. A bias spring can be interposed.

Further, the thrust bearing is arranged between the curved bimetal and the piston member via the pressing member, and the spring force adjustment by screwing back and forth between the cylinder and the valve body can be easily and reliably performed.

The material and structure of the bimetal pressing member and the thrust bearing can be appropriately selected according to the size and spring force of the bimetal, the shape of the piston member, and the like. A holding plate made of a material or a structure in which the thrust bearing box also serves as the holding plate can be adopted.

Further, in the present invention, the cylinder and / or the valve body (for example, the diaphragm support base of the embodiment) may be provided with a gas vent hole that communicates the internal space formed by the cylinder, the valve body, and the diaphragm with the outside. Therefore, it has a function of responding to the temperature change of the draft beer that occurs when the draft beer dispenser is not used, and preventing the retained carbon dioxide gas in the closed pipeline from being absorbed by the draft beer. The position, shape, and size can be arbitrarily selected, and in order to prevent the entry of moisture, dust, and the like through the hole, it is preferable to provide the diaphragm support base downward as in the embodiment.

Disclosure of the Invention Based on the Drawings FIG. 1 is a longitudinal sectional view of a pressure control valve showing one configuration of the invention. FIG. 2 is a schematic explanatory view of a draft beer dispenser provided with the pressure control valve of the present invention. In addition, the bimetal of the embodiment uses a structure in which the high expansion side is arranged on the convex side and the low expansion side is arranged on the concave side.

The pressure control valve is a valve body (1) having a diaphragm (21) and a valve stem (15) built in an internal thread (6) on the opening side of a cup-shaped cylinder (1) containing a bimetal (2).
The screw thread (23) of (0) is screwed together to be integrated.

In the valve body (10), a diaphragm support base (20) having a disk-shaped diaphragm (21) provided with a relief hole (21a) in the center and a valve body (11) are screwed and integrated with each other. The diaphragm (21) is fixed by screwing the valve body (11) into the diaphragm support base (20).

That is, the diaphragm support (20) has a female screw portion (22) for screwing and integrating the lower end portion of the opening with the valve body (11).
The upper end portion of the opening is formed with a screw portion (23) for screwing and integrating the cylinder (1), and the central portion has a through hole (24) for locating a push pin (4) described later. ) Is provided.

The valve body (11) is provided with a through hole (12) in the center thereof, and connects the carbon dioxide gas inlet port (13) and the carbon dioxide gas outlet port (14) to each other, and the through hole (12) has a central portion. A valve stem (15) around which a flange (15a) is provided is inserted, and an end cap (16) screwed to the outer end of the through hole (12) and the flange (15).
a valve spring (1) wound around the valve stem (15) between
7), the tip of the valve stem (15) presses the center of one pressure receiving surface (the lower surface of the diaphragm in the figure) of the diaphragm (21), that is, the relief hole (21a), and the diaphragm (21). In conjunction with the through hole (1
2) and the flange portion (15a), the valve portion (18) is configured to adjust the opening degree.

In the cylinder (1), on the inner surface of the flat surface on the head (5) side,
The bimetal (2), which is laminated so that the bending directions are alternated, comes into contact with the pressure receiving disk portion of the push pin (4) through the disk-shaped Bakelite holding plate (3). Further, a thrust bearing (8) is interposed between the pressing plate (3) and the push pin (4).

Further, a bias spring (9) is wound around the pressing rod portion of the push pin (4), and the tip of the rod portion is inserted into the through hole (24) of the diaphragm support base (20) so that the diaphragm (21 ) On the other pressure receiving surface (the upper surface of the diaphragm in the figure).

The relief hole (21a) provided as necessary for the diaphragm (21) passes through the gas guide groove (4a) and the gas vent hole (25) provided at the tip of the push pin (4) from the same portion, and the extra hole is provided. Carbon dioxide can be released to the outside of the valve to reduce the carbon dioxide pressure.

The pressing force of the push pin (4) on the diaphragm (21) is the spring force of the bimetal (2), and this spring force is applied to the female screw portion (6) on the opening side of the cylinder (1) and the valve. Adjustable by screwing back and forth with the male thread (23) of the body (10) to the male thread (23) of the valve body (10) provided on the female thread (6) of the cylinder (1). The abutting lock screw (7) can be positioned after adjustment.

When assembling the pressure control valve, after arranging the respective constituent members shown in FIG. 1 at predetermined positions, carbon dioxide gas having a constant pressure is caused to flow from the inlet port (13) of the valve body (11) to the outlet port (14) side. The screwing amount of the cylinder (1) and the valve body (10) is adjusted until the pressure of (1) reaches a predetermined pressure (initial pressure).

That is, the spring force of the bimetal (2) and the valve spring (17)
When the spring force and gas pressure of the equilibrium (initial pressure)
Then, the lock screw (7) is tightened to fix the cylinder (1) and the valve body (10).

In addition, by inserting the thrust bearing (8) between the pressing plate (3) and the push pin (4), the bimetal (2) is not rotated, and thus the positional displacement of the laminated bimetal (2) is prevented. Without, also diaphragm (21)
It is possible to set and adjust the pressure by screwing the cylinder (1) and the valve body (10) very easily without twisting the push pin (4).

Further, the heat insulating case (30) is provided on the outer periphery of the cylinder (1).
Is installed around. This heat insulating case (30) leaves the closed head portion (5) of the cup-shaped cylinder (1) as a temperature sensitive portion, and covers the outer peripheral surface other than the temperature sensitive portion, and the sense of the cylinder (1) is kept. A projecting portion (31) is provided on the inner circumference so as to divide the warm portion side and the male thread portion (6) side of the opening into two parts.

Further, in the embodiment, as will be described later, since the lower surface of the projection (D ₁ ) at the bottom of the vial (D) and the head (5) of the cylinder (1) of the pressure control valve are arranged in contact with each other, Head (5)
Although it is a flat surface, the outer shape of the cylinder (1) can be set to an arbitrary shape depending on the arrangement destination so that the temperature can be easily sensed.

The holding plate (3) of the bimetal (2) shown in FIG.
For example, the push pin (4) and the bimetal (2) may be in direct contact with each other instead of an essential component in the present invention.

Further, by disposing the holding plate (3) with a heat insulating material, it is possible to reduce the diffusion of heat from the bimetal (2) and improve the responsiveness to temperature changes. The effect of 30) is further enhanced, and the responsiveness to temperature changes is further improved.

Further, the structure of the valve portion (18) is not limited to the structure shown in FIG. 1, and the shape of the valve body (11), the shape of the valve stem (15) and the like may be appropriately selected. Spring (1
Regarding the shape and arrangement of 7), any known means may be adopted as long as the diaphragm (21) is pressed via the valve stem (15).

Furthermore, it is desirable to use an Al material for the cylinder (1), the diaphragm support (20), etc. in consideration of workability, etc., but especially in this field of use, considering the corrosion resistance, the surface of the Al material is electroless Ni plated and It is desirable to perform multi-layer plating of Cr electroplating.

With the arrangement of the pressure control valve of the present invention having the above-described configuration, the effect of the present invention can be achieved if the pressure control valve is arranged in the same atmosphere in which the beverage tank is arranged, in addition to being in contact with the beverage tank or the pumping pipeline. . Below, as shown in FIG. 2, an example in which the lower surface of the protrusion (D ₁ ) at the bottom of the beer barrel (D) and the head (5) of the cylinder (1) of the pressure control valve are directly contacted with each other will be described. To do.

As shown in FIG. 2, the draft beer dispenser uses the carbon dioxide gas from the carbon dioxide cylinder (A) to pump the draft beer (E) in the beer barrel (D) to the instantaneous cooler (F), and from the server cock (G). It consists of pouring into a jug (H).

That is, the carbon dioxide gas in the carbon dioxide gas cylinder (A) is once decompressed to a predetermined pressure by the pressure reducing valve (B), then pressure-fed to the pressure control valve (C), and the beer barrel ( After the pressure is automatically adjusted to a pressure corresponding to the temperature of the draft beer (E) in D), it is pressure fed into the beer barrel (D).

The draft beer (E) in the beer barrel (D) always contains carbon dioxide corresponding to the temperature by the above pressure control, and after being cooled to an appropriate temperature via the instantaneous cooler (F), the server cock ( By opening and closing G), a jug (H)
Is poured into.

In the pressure control valve having the above-described structure, when the pressure of carbon dioxide gas fed from the carbon dioxide gas cylinder (A) increases, the pressure on the outlet (14) side increases, and the diaphragm (2
1) is pushed up and the valve stem (15) interlocking with it is moved upward, so the opening degree of the valve section (18) is reduced and the gas flow rate is reduced, lowering the gas pressure on the outlet (14) side. Let

On the other hand, when the pressure of carbon dioxide gas fed from the carbon dioxide gas cylinder (A) is reduced, the pressure on the outlet (14) side is reduced, and the spring force of the bimetal (2) reduces the diaphragm (2).
1) is pushed down and the valve stem (15) interlocking with it is moved downward, so the opening degree of the valve part (18) is expanded, increasing the gas flow rate and increasing the gas pressure on the outlet (14) side. Let

In this way, the above-described operation makes it possible to maintain the preset initial pressure at a constant pressure without fluctuating.

Further, the temperature change of the draft beer is detected by the bimetal (2) via the via barrel ((D) and the cylinder (1), and as the temperature rises, the bimetal (2) is bent and deformed, and the push pin (4) ), The diaphragm (21) is pushed downward to increase the opening degree of the valve section (18), thereby increasing the pressure on the outlet (14) side.

Similarly, when the temperature of draft beer decreases, the curvature of the bimetal (2) is corrected accordingly, the force pressing the diaphragm (21) via the push pin (4) decreases, and the diaphragm (21) is pushed upward. The degree of opening of the valve section (18) is reduced, and the pressure on the outflow port (14) side can be reduced.

That is, for the initial pressure at the preset temperature,
The pressure on the outlet (14) side can be automatically increased or decreased by the deformation of the bimetal (2) corresponding to the temperature change of the draft beer, and it is possible to obtain the optimum pressure immediately corresponding to the temperature of the draft beer. Become.

In the case of a carbonated drink cup server, carbonated water obtained with a carbonator and a predetermined amount of syrup are pressure-fed by carbon dioxide gas to mix, but when the syrup temperature decreases,
Since the viscosity increases, it is necessary to increase the pressure-feeding pressure, and conversely, when the syrup temperature increases, the pressure-feeding pressure needs to be decreased.

The pressure control valve having the same structure as described above is used for the pressure feeding of carbon dioxide gas to the carbonator, but for the pressure feeding of the syrup, the bimetal of the pressure control valve described above, the low expansion side is the convex side,
By using a bimetal having a structure in which the high expansion side is arranged on the concave side, it is possible to maintain the optimum carbon dioxide gas pressure corresponding to the temperature change of the syrup.

Effect of the Invention The pressure control valve according to the present invention automatically adjusts the pressure of carbon dioxide gas in response to the temperature change of draft beer and the like, and can always maintain an appropriate pressure without damaging the taste.
Draft beer etc. can be supplied.

In particular, in the pressure control valve of the present invention, since the cup-shaped cylinder and the valve body are screwed and integrated, it is possible to easily store and arrange a plurality of curved bimetals having a large spring property in the cylinder. In addition, the inner peripheral surface of the cylinder serves as a guide surface for the push pin, the bimetal holding plate, etc., and the assembly can be further facilitated.

Also, when setting the initial pressure, it is only necessary to adjust the screwing amount between the cylinder and the valve body, which enables highly accurate pressure adjustment with easy work.

Further, the pressure control valve according to the present invention has a good sealing property even when the head of the cylinder is brought into direct contact with a beverage tank such as a beer barrel, so that draft beer can be prevented from entering and the life of the control valve can be extended. In addition, a heat insulating case made of a low thermal conductivity material is provided on the outer peripheral surface of the cylinder other than the temperature sensitive portion so that the cylinder is thermally divided into a closed side and an open side. By interposing, the heat can be prevented from diffusing from the temperature sensitive portion to each part of the cylinder, and the sensitivity at the temperature sensitive portion can be significantly improved.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention. FIG. 2 is a schematic view of a draft beer dispenser provided with the pressure control valve of the present invention. 1 ... Cylinder, 2 ... Bimetal, 3 ... Presser plate, 4
...... Push pin, 4a …… Gas guide groove, 5 …… Head, 6,
22 …… Female thread, 7 …… Lock screw, 8 …… Thrust bearing, 9 …… Bias spring, 10 …… Valve body, 11 ……
Valve body, 12, 24 ... Through hole, 13 ... Inlet, 14 ... Outlet, 15 ... Valve stem, 15a ... Flange, 16 ... End cap, 17 ... Valve spring, 18 ... Valve Department, 19,23 ……
Male thread, 20 …… diaphragm support, 21 …… diaphragm, 21a …… relief hole, 25 …… gas vent hole, 30 ……
Insulation case, 31 ... Protrusion. A ... Carbon dioxide cylinder, B ... Pressure reducing valve, C ... Pressure control valve, D ... Beer barrel, E ... Draft beer, F ... Instant chiller, G ... Server cock, H ... Jug.

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A piston member comprising a plurality of curved bimetals, each of which is in contact with the closed inner end surface of a cylinder whose one end is open and the other closed end is a temperature-sensing portion, and in which the bending directions are alternately laminated. At the opening of the cylinder that is pressed and stored with
The valve body, which has a structure in which the stem for adjusting the valve opening degree is pressed by a spring, is screw-integrated into one pressure receiving surface of the built-in diaphragm, and the pressing amount of the tip end of the piston member to the other pressure receiving surface of the diaphragm can be adjusted. A temperature-compatible pressure control valve characterized in that a heat insulating case is disposed in contact with or circumferentially provided on the outer peripheral surface of the cylinder other than the temperature sensing portion.