JPH0442621Y2 - - Google Patents

Description

[Detailed description of the invention] Field of application This invention relates to the improvement of pressure control valves for pressurized carbon dioxide gas used in carbonators of draft beer dispensers and carbonated beverage cup servers, etc., and is particularly applicable to temperature changes in draft beer and carbonated beverages. The present invention relates to a temperature-responsive pressure control valve that automatically corrects the pressure of carbon dioxide gas and maintains it at an appropriate pressure at all times.

BACKGROUND ART A draft beer dispenser is configured to use carbon dioxide gas from a carbon dioxide gas cylinder to forcefully feed draft beer in a beer barrel to an instant cooler through a tube pipe, and then pour it out from a server to a brewer.

When making a carbonated beverage using a carbonated beverage cup server, carbonated water obtained by pumping carbon dioxide gas from a carbon dioxide gas cylinder and a predetermined amount of syrup, etc., which is pumped with carbon dioxide gas, are added to the drinking water in the carbonator. It consists of mixing and pouring it out into a pot.

In order to maintain the taste of draft beer, carbonated drinks, etc. and stable pouring, it is necessary to adjust the pressure of the pumped carbon dioxide gas.Generally, if the pressure of carbon dioxide gas is too low, carbon dioxide gas will be released from draft beer, etc. If the pressure of carbon dioxide gas is too high, carbon dioxide gas will dissolve into draft beer, etc. In either case, there will be a lot of foaming when pouring out the beer, which will spoil the unique taste of various beverages.

Moreover, the higher the temperature of such draft beer, the easier it is for carbon dioxide to separate, so as the temperature rises,
It is necessary to increase the pressure of carbon dioxide gas.

For this reason, a method has been adopted in which a pressure control valve for carbon dioxide gas is disposed in a pressure-feeding pipeline that connects a carbon dioxide gas cylinder and a beverage tank such as a beer barrel.

However, conventionally used pressure control valves usually have a structure that reduces the pressure from a carbon dioxide gas cylinder to a required pressure and maintains that pressure constant, or a structure that manually adjusts the pressure as needed. This configuration is extremely inconvenient for adjusting the appropriate pressure in response to changes in the temperature of draft beer, etc. as described above.

Purpose of the invention In view of the above-mentioned problems, this invention makes it possible to automatically adjust the pressure of the pumped carbon dioxide to an appropriate pressure in response to changes in the temperature of draft beer, carbonated drinks, etc., and has a simple structure and is easy to manufacture. The objective is a temperature-responsive pressure control valve with a

Structure of the invention This invention includes a cylinder in which a plurality of curved bimetals stacked in alternating curved directions are pressed and housed on the closed side of a cylinder with one side open by a piston member via a bias spring; The valve body has a structure in which a stem that adjusts the opening degree of the valve part is pressed by a spring on one pressure receiving surface of the built-in diaphragm.
A temperature-responsive pressure control valve characterized in that the piston member is integrally screwed with the diaphragm so that the amount of pressure applied to the other pressure receiving surface of the diaphragm can be adjusted.

Preferred Embodiment of the Invention The temperature-responsive pressure control valve (hereinafter referred to as pressure control valve) of this invention has a temperature-sensing part that most easily senses the temperature of a plurality of curved bimetals and so that the spring force is transmitted effectively. By arranging the valve directly in the cylinder, it is possible to adjust the opening degree of the valve part in response to changes in the temperature of draft beer, carbonated drinks, etc., and to connect the valve body with a built-in diaphragm and stem to the cylinder It has a structure in which the pressure control valves are screwed together to facilitate setting and adjusting the initial pressure of the pressure control valve.

The specifications of the plurality of curved bimetals constituting the pressure control valve of this invention are appropriately selected depending on the pressure-controlled fluid, the application, and the like.

For example, in the case of the bimetal pressure control valve used in the draft beer dispenser of the example, the high expansion side is placed on the convex side and the low expansion side is placed on the concave side, which is processed into a so-called disc spring shape, and they are mutually connected. The piston member is stacked so that the bending directions are alternate, that is, the high expansion side faces the high expansion side, and the low expansion side faces the low expansion side, and deforms in the bending direction in response to ambient temperature changes. The diaphragm on the valve body side is pressed at a predetermined pressure through the valve body. Further, in the case of pumping syrup in a carbonated beverage cup server, the high expansion side and low expansion side of the bimetal have a configuration opposite to the above configuration.

In order to achieve highly accurate pressure control, it is desirable to use a large number of curved bimetals.
It is desirable to select the quantity, shape, and material of the pressure control valve in consideration of the size, operating temperature range, type of liquid to be pumped, etc.

In addition, the piston member that presses and stores the curved bimetal in the cylinder via a bias spring and transmits the spring force of the bimetal to the diaphragm is
In addition to the push pin configuration as shown in the embodiment, any configuration can be applied as long as it has the above function and can be interposed with a bias spring that provides the required reaction force to the bimetal.

Note that the bias spring has a function of not changing the set pressure even when the pressure control valve is exposed to an extremely low temperature atmosphere.

The valve body, which is screwed together with the cylinder, may have a configuration in which the insertion hole of the valve stem serves as a flow path as shown in the embodiment, or a configuration in which the valve portion that closes the flow path is pressed to open and close by the stem. Any known structure can be used as long as the stem for adjusting the opening degree of the valve part is pressed by a spring on one pressure receiving surface of the built-in diaphragm, and the other pressure receiving surface of the diaphragm can be pressed by a piston member such as a push pin on the cylinder side. Configurations are also available.

In addition, in this invention, by providing a relief hole in the diaphragm or a gas vent hole in the valve body, it is also possible to maintain the carbon dioxide pressure corresponding to the temperature change of the draft beer that occurs when the draft beer dispenser is not in use.

Furthermore, by arranging a thrust bearing between the curved bimetal and the piston member via a presser member, the spring force can be easily and reliably adjusted by screwing the cylinder and the valve body back and forth.

The pressure control valve according to this invention can have the outer surface of the cylinder containing the curved bimetal made into a smooth surface or have a desired shape, so it can be placed in direct contact with a beverage tank such as a beer barrel or a pressure feed pipe. Immediate response to temperature changes in draft beer, etc. can be further improved.

Further, the arrangement shape of each component mentioned above can be appropriately selected depending on the required control accuracy, main body dimensions, etc.

Disclosure of the invention based on drawings FIG. 1 is a longitudinal sectional view of a pressure control valve showing one configuration of the invention. FIG. 2 is a schematic illustration of a draft beer dispenser equipped with the pressure control valve of this invention. The bimetal used in this embodiment has a configuration in which the high expansion side is placed on the convex side and the low expansion side is placed on the concave side.

The pressure control valve is integrated by screwing the male threaded part 23 of the valve body 10 containing the diaphragm 21 and the bubble stem 15 into the female threaded part 6 on the opening side of the cup-shaped cylinder 1 containing the bimetal 2. Consisting of:

The valve body 10 is constructed by screwing together a diaphragm support 20 on which a disk-shaped diaphragm 21 with a relief hole in the center is stretched, and a valve body 11. By screwing the body 11 into the diaphragm 21
This is a structure in which the is fixed.

That is, the diaphragm support 20 has a female threaded portion 22 at the lower end of the opening for screwing and integrating with the valve body 11, and a male threading portion 23 for screwing and integrating the cylinder 1 at the upper opening end. At the same time, a through hole 24 is provided in the central portion in which a push pin 4, which will be described later, is located.

The valve body 11 is provided with a through hole 12 in the center, which communicates an inlet 13 and an outlet 14 for carbon dioxide gas, and the through hole 12 has a valve stem having a flange 15a around the center. 15 is inserted,
A valve spring 17 is wound around the valve stem 15 between the end cap 16 screwed onto the outer end of the through hole 12 and the flange 15a. When pressing the center part (lower surface of the diaphragm), that is, the relief hole part, the diaphragm 21
In conjunction with this, the opening degree of the valve portion 18 formed by the through hole 12 and the flange portion 15a is adjusted.

Inside the cylinder 1, on the inner surface of the flat head 5 side,
The pressure-receiving disc part of the push pin 4 is brought into contact with the pressure-receiving disc part of the push pin 4 through a disc-shaped presser plate 3 so that the bimetals 2 stacked so that the bending directions are alternate are brought into contact with the pressure-receiving disc part of the push pin 4. A bias spring 8 is wound around the rod portion, and the tip of the rod portion is inserted through the through hole 24 of the diaphragm support base 20.
It is in contact with the other pressure receiving surface of the diaphragm 21 (the upper surface of the diaphragm in the figure).

The pushing force of the push pin 4 against the diaphragm 21 is the spring force of the bimetal 2, and this spring force is caused by the screw engagement between the female threaded portion 6 on the opening side of the cylinder 1 and the male threaded portion 23 of the valve body 10. It can be adjusted by moving forward or backward, and the positioning after adjustment can be determined by a lock screw 7 provided in the female threaded part 6 of the cylinder 1 and abutting on the male threaded part 23 of the valve body 10.

When assembling the pressure control valve, after arranging each component shown in FIG.
The screwing amount between the cylinder 1 and the valve body 10 is adjusted until the pressure on the 4 side reaches a predetermined pressure (initial pressure).

In other words, the spring force of bimetal 2 and the valve spring 1
When the spring force of 7 and the gas pressure are balanced (initial pressure), the lock screw 7 is tightened to fix the cylinder 1 and the valve body 10.

In addition, as will be described later, in the embodiment, the lower surface of the projection D ₁ at the bottom of the beer barrel D is in contact with the head 5 of the cylinder 1 of the pressure control valve, so the head 5 is not a flat surface. However, the outer shape of the cylinder 1 can be made into any shape depending on the location where it is placed so as to easily sense temperature.

The presser plate 3 of the bimetal 2 shown in FIG.
Although it is not an essential component in this invention, for example, the push pin 4 and the bimetal 2 may be in direct contact with each other.

In addition, by making and arranging the presser plate 3 with a heat insulating material, the diffusion of heat from the bimetal 2 is reduced.
It is also possible to improve responsiveness to temperature changes.

The diaphragm 21 does not necessarily need a relief hole, and especially the valve stem 15 is connected to the diaphragm 2.
Any known means can be used as the connecting means as long as the connecting means is linked to the displacement of one.

Furthermore, the configuration of the valve portion 18 is not limited to the configuration shown in FIG. etc. also valve stem 15
Any known means may be used as long as the diaphragm 21 is pressed through the diaphragm 21.

Furthermore, the cylinder 1 and the diaphragm support stand 20
It is desirable to use A1 material in consideration of workability, etc., but especially in this field of use, considering corrosion resistance, it is recommended to perform multi-layer plating of electroless Ni plating and Cr electroplating on the surface of A1 material. or desirable.

Effects The pressure control valve of this invention having the above configuration can achieve the effects of this invention by not only contacting the beverage tank or the pressure conduit but also by placing it in the same atmosphere as the beverage tank. can. Below, as shown in Figure 2, the protrusion at the bottom of beer barrel D
An example will be described in which the lower surface of D ₁ and the head 5 of the cylinder 1 of the pressure control valve are placed in direct contact with each other.

As shown in FIG. 2, the draft beer dispenser is configured to force draft beer E in a beer barrel D to an instantaneous cooler F using carbon dioxide gas from a carbon dioxide gas cylinder A, and then pour it out from a server tank G to a brewer H.

In other words, the carbon dioxide gas in carbon dioxide cylinder A is
After the pressure is reduced to a predetermined pressure at one end by the pressure reducing valve B, the pressure is fed to the pressure control valve C, and the pressure is automatically regulated by the pressure control valve C to a pressure corresponding to the temperature of the draft beer E in the beer barrel D. It is pumped into beer barrel D.

The draft beer E in the beer barrel D always contains carbon dioxide gas corresponding to its temperature due to the pressure control described above, and after being cooled to the appropriate temperature via the instantaneous cooler F, it is turned into a cold beer H by opening and closing the server barrel G. It is poured.

In the pressure control valve configured as described above, when the pressure of the carbon dioxide gas pumped from the carbon dioxide gas cylinder A increases, the pressure on the outlet 14 side increases, pushing up the diaphragm 21, and the valve stem 15 interlocked with this increases. , the opening degree of the valve part 18 decreases to reduce the gas flow rate, and the outlet port 1
Decrease the gas pressure on the 4th side.

On the other hand, when the pressure of the carbon dioxide gas pumped from the carbon dioxide gas cylinder A decreases, the pressure on the outflow port 14 side decreases, and the spring force of the bimetal 2 pushes down the diaphragm 21, and the valve stem 15 interlocked with this moves downward. Therefore, the opening degree of the valve portion 18 is expanded, the gas flow rate is increased, and the gas pressure on the outlet port 14 side is increased.

In this way, the above-mentioned action makes it possible to maintain the preset initial pressure at a constant pressure without changing it.

Furthermore, the bimetal 2 senses the temperature change of the draft beer via the beer barrel D and the cylinder 1, and as the temperature rises, the bimetal 2 deforms in a curved manner.
By pushing the diaphragm 21 downward via the push pin 4 and increasing the degree of opening of the valve portion 18, it is possible to increase the pressure on the outflow port 14 side.

Similarly, when the temperature of the draft beer decreases, the curvature of the bimetal 2 is corrected accordingly, the force pressing the diaphragm 21 via the push pin 4 decreases, the diaphragm 21 is pushed upward, and the degree of opening of the valve portion 18 decreases. However, it becomes possible to reduce the pressure on the outlet 14 side.

That is, with respect to the initial pressure at a preset temperature, the pressure on the outlet 14 side can be automatically increased or decreased by deforming the bimetal 2 in response to changes in draft beer temperature, and can immediately respond to the temperature of draft beer. This makes it possible to obtain the optimum pressure.

In addition, in the case of a carbonated beverage cup server, carbonated water obtained in a carbonator and a predetermined amount of syrup are mixed by being pumped using carbon dioxide gas, but as the syrup temperature decreases, the clay increases, so the pumping pressure is not adjusted. Conversely, if the syrup temperature increases, it is necessary to reduce the pumping pressure.

A pressure control valve with the same configuration as above is used to forcefully feed carbon dioxide gas to the carbonator, but in order to forcefully feed such syrup, the bimetallic pressure control valve has a convex surface on the low expansion side and a concave surface on the high expansion side. By using a bimetal structure placed on the side, it is possible to maintain the optimum carbon dioxide pressure in response to changes in syrup temperature.

In this invention, when adjusting the set pressure of the pressure control valve, the bias spring 8 is used as a bimetallic 2
By adding a required pressure to the pressure control valve, the pressure control valve has the function of not changing its set pressure even if it is exposed to an extremely low temperature atmosphere.

In other words, when bimetal 2 senses low temperature,
When the curvature is corrected and becomes almost flat, the spring force decreases, and especially when the inflow of carbon dioxide gas decreases and the pressure at the valve body 11 decreases, the gap between the plurality of stacked bimetals 2 increases. When the temperature rises and moves and the temperature rises again, the initial set pressure will fluctuate and it will be difficult for the control valve to adjust the pressure.

However, by arranging the bias spring 8, even if the bimetal becomes flat, the bimetal can be pressed and placed with the required pressure so that the mutual position at the time of pressure setting does not change, and the above-mentioned problem can be eliminated.

Effects of the invention The pressure control valve according to this invention can automatically adjust the pressure of carbon dioxide gas in response to changes in the temperature of draft beer, etc., and maintain the pressure at an appropriate level at all times. can be supplied.

In particular, since the pressure control valve of this invention has a configuration in which the cup-shaped cylinder and the valve body are screwed together, it is possible to easily store and arrange multiple curved bimetals with large spring properties in the cylinder. Moreover, the inner circumferential surface of the cylinder serves as a guide surface for push pins, bimetal holding plates, etc., making assembly even easier.

Furthermore, when setting the initial pressure, only the amount of screwing between the cylinder and the valve body is adjusted, making highly accurate pressure adjustment possible with easy work.

In addition, the bias spring allows the pressure control valve to be used even when exposed to extremely low temperatures, regardless of whether the pressure control valve is used or not.
There is no fluctuation in the mutual position of the laminated bimetals, and the initial pressure during assembly and adjustment can be maintained.

Furthermore, even if the head of the cylinder comes into direct contact with a beverage tank such as a beer barrel, the pressure control valve of this invention has good sealing properties, which prevents draft beer from entering, thereby extending the life of the control valve. can.

[Brief explanation of the drawing]

FIG. 1 is an explanatory longitudinal cross-sectional view showing one embodiment of this invention. FIG. 2 is a schematic diagram of a draft beer dispenser equipped with the pressure control valve of this invention. 1...Cylinder, 2...Bimetal, 3...Press plate, 4...Push pin, 5...Head, 6,2
2... Female threaded portion, 7... Lock screw, 8... Bias spring, 10... Valve body, 11... Valve body, 1
2, 24... through hole, 13... inlet, 14...
Outlet, 15...Valve stem, 15a...Flange, 16...End cap, 17...Valve spring, 18...Valve part, 19, 23...Male thread part, 2
0...Diaphragm support base, 21...Diaphragm, A...Carbon dioxide cylinder, B...Pressure reducing valve, C...
...Pressure control valve, D...Beer barrel, E...Draft beer,
F... Instant cooler, G... Server Kotoku, H...
…Jijotsuki.

Claims (1)

[Scope of utility model registration request] A cylinder in which a plurality of curved bimetal sheets stacked in alternating directions are pressed and housed on the closed side of a cylinder with one side open and a piston member via a bias spring, and one pressure-receiving surface of a built-in diaphragm. The valve body, which has a structure in which a stem that adjusts the degree of opening of the valve portion is pressed by a spring, is screwed into one body so that the amount of pressure applied to the other pressure receiving surface of the diaphragm at the tip of the piston member can be adjusted. Temperature-compatible pressure control valve.