JPH02125309A - Pressure control valve - Google Patents

Abstract

PURPOSE:To automatically increase or reduce the pressure of an exit-side flow passage by providing a diaphragm provided with an aperture opened and closed with a valve body, a second elastic means which presses the diaphragm, and a control means which controls its elastic force. CONSTITUTION:The aperture of a diaphragm 7 is opened and closed by a valve body 4 to open and close the flow passage in a valve main body for air. Therefore, the pressure on the exit side exceeds a control pressure, and the control pressure can be changed by the variation of the air temperature because the aperture and a valve seat 2a are closed with the valve body by an air temperature compensation type second elastic means 13. Thus, the quantity of carbon dioxide gas dissolved in beer is accurately and automatically controlled. Further, the elastic force of the second elastic member 13 is reduced by a control means 14 to sufficiently reduce the pressure on the exit side, namely, the beer tank side, and the beer tank is easily replaced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a valve that adjusts pressure while reacting to outside temperature, and particularly to a valve that adjusts the pressure of fluid supplied to the consumption side of carbon dioxide gas. This invention relates to a pressure regulating valve for regulating pressure.

[Prior Art J] Fig. 7 shows a conventionally used draft beer supply system that uses carbon dioxide gas and supplies draft beer E from a beer barrel through a cooler F and a stopper G. In this system, carbon dioxide gas is sent from a cylinder A to a beer barrel via a pressure regulating valve, and beer E is pushed out of the beer barrel under pressure and supplied to a beer mug or the like through a stopper G.

FIG. 6 shows a general type of the above-mentioned pressure regulating valve B that has been conventionally used.

In this figure, reference numbers 1a and Ib are inlet and outlet plugs, which are screwed into the inlet and outlet of the valve body 1, respectively. A valve seat body 2 is fitted into the inner diameter portion 1c of the valve body 1. The valve seat body 2 is provided with a cylindrical blind hole 2a extending upward from its lower end.

A through hole 2b is provided in the soil wall serving as the bottom of the blind hole, and the bottom surface is raised around the through hole 2b to form a valve seat 2C on which the valve plate 4 is seated. Valve plate 4
The valve stem 5 passes through the through hole 2b and faces upward,
Its upper end flange is fixed to the center of a diaphragm 6 held between the valve body 1 and an upper case 9 screwed therein. The diaphragm 6 keeps the inside of the valve body 1 airtight and functions to sense the pressure inside the valve body 1. The upper case 9 has a cylindrical portion 9a having a male thread on its outer peripheral surface and protruding outward and upward, and a cap 8 is screwed into the cylindrical portion 9a. Cylindrical part 9a
A coil spring 7 is arranged on the inner diameter part of the spring 7.
The upper end touches the inner bottom of the cap 8, and the lower end is held by a spring seat 10 provided at the center of the upper surface of the diaphragm 6. For this reason, cap 8
Since the elastic force of the coil spring 7 can be changed depending on the degree of screwing, the gas supply pressure can be changed at will.

That is, the diaphragm 6 is vertically displaced by the pressure inside the valve body 1 to a position that balances this elastic force. Now, in Fig. 7, when tap G is opened and beer E is drained, the pressure in tank F decreases, and the pressure at the outlet of pressure regulating valve B decreases accordingly. is pushed down by spring 7,
Therefore, the pressure regulating valve plate 4 is moved away from the valve seat 2c, and the gas in the cylinder A is supplied into the tank D through the pressure regulating valve B.

When the outlet pressure of the regulating valve B increases, the diaphragm 6
It overcomes the spring 7 and rises, and as a result, the pressure regulating valve plate 4 seats on the valve seat 2, cutting off the flow of gas.

[Problems to be Solved by the Invention] In the above pressure regulating valve, the pressure inside the tank D can be arbitrarily set depending on the degree of screwing of the cap 8, but it can be set arbitrarily depending on the temperature of the beer placed in the atmosphere. Since there are differences in the solubility of carbon dioxide gas, it is necessary to adjust the amount of dissolved gas to a constant level by often changing the degree to which the cap 8 is screwed in, depending on the outside temperature. However, since the pressure regulating valve described above is not provided with a means for releasing gas into the atmosphere, it is not possible to directly adjust the pressure in response to the outside temperature via the pressure regulating valve. If the pressure is to be lowered, there is no other way than to open the supply tap G and release the beer, which results in the release of a considerable amount of beer E and carbon dioxide, resulting in waste.

Due to the presence of residual pressure when replacing the beer tank, the replacement work was time-consuming.

[Means for Solving the Problems J] The structure of the present invention that solves the above problems is to provide a flow path communicating between the inlet and the outlet in the valve body provided with an inlet and an outlet, and to connect the flow path to the valve body. A valve seat body having a valve seat is provided, a valve member is slidably provided on the valve seat body, and a first valve seat body is provided.
The elastic means biases the first elastic member toward the valve seat, and the pressure regulating means applies a pressing force to the first elastic means in a direction that overcomes the force. a diaphragm that isolates the flow path from the atmosphere and is provided with an opening that is opened and closed by the valve body; and an atmospheric temperature compensated second diaphragm that presses the diaphragm toward the valve body.
This configuration includes an elastic means and an adjusting means for adjusting the elastic force of the second elastic means.

[Function] In the above configuration, the opening of the diaphragm is opened and closed by the valve body to open and close the flow path in the valve body to the atmosphere. Because this opening is provided, the pressure on the outlet side will not exceed the regulated pressure, and since the opening and the valve seat are closed by the valve body by the second elastic means of the atmospheric temperature compensation type, the atmospheric temperature Since the adjustment pressure can be changed by fluctuations in the amount of carbon dioxide, it is possible to accurately and automatically control, for example, the amount of carbon dioxide gas dissolved in beer.

Furthermore, if the elastic force of the second elastic member is reduced by the adjustment means, the pressure on the outlet side, that is, on the beer tank side, can be sufficiently reduced, so that the beer tank can be easily replaced.

Explain in detail.

In FIG. 1, reference number 1 indicates an inlet plug 1a and an outlet plug 1.
It is a valve body having b. This valve body 1 has a cylindrical recess 1 that communicates with the flow path from the inlet plug 1a at the lower part.
A pressure regulating valve seat 2a is provided on the outside of the bottom of the recess 1h.
A valve seat body 2 provided with is fitted. A valve seat plate 3 fixed to a rod extending below the valve body 4 is seated on the valve seat 2a of the valve seat body 2, so that the outlet plug 1
The flow path 11 from the inlet plug 1a is communicated with and cut off from the flow path from the inlet plug 1a. The upper part of the valve body 4 is a cylindrical slide block 4a, and a coil spring 20 is wound around the rod between the bottom of the recess of the valve seat body 2 and the lower surface of the block 4a. Therefore, the valve body 4 is biased upward, and the pressure regulating valve seat plate 3 provided at the lower end of the rod is always seated on the valve seat 2a. Note that the slide block 4a is provided with a relief groove 4b to prevent pressure fluid from being trapped between the lower side of the slide block 4a and the bottom surface of the valve seat body 2. The valve body has an annular shoulder 1c extending outward from the recess, above which:
It terminates in a relatively thick annular wall 1d which is threaded on its outer surface. A peripheral portion of the diaphragm is arranged on the top surface of the annular wall 1d, and is held between the retainers 22. An opening is provided in the center of the diaphragm 4, and a relief valve seat 6 is provided around the opening. A relief valve plate 5 fitted onto the upper surface of the slide block 1d of the valve body 2 is seated on the relief valve seat 6. That is, the relief valve seat 6 is operated by temperature-compensated elastic means, which will be explained in detail below.
It is pressed against the relief valve plate 5 mentioned above.

The valve body 1 is provided with three long through-holes 1t extending downward from its annular wall, and a slide pin 11 is inserted into each of the through-holes 1t. The upper and lower ends of the slide pin are the upper and lower triangular plates 12°17 (Fig. 2)
Fixed by A coil spring 13 is disposed between the upper plate member 12 and the spring retainer portion at the upper part of the relief valve plate,
As a result, the relief valve seat 6 is always seated on the side of the relief valve plate 5. Further, the lower plate member 17 is pressed upward by the adjustment spring 15. The lower end of the adjustment spring 15 is secured to the bottom inner surface of the adjustment cap 14 which threadably engages with the external thread of the bottom cover 21 screwed into the bottom of the valve body 21. Note that reference number 16 is a spring retainer sleeve.

A power element 10 is arranged on the upper surface of the upper plate member 12 with a sphere 9 interposed therebetween. That is, the bottom surface of the power element 10 is provided with four parts, and the sphere 9 on the upper surface of the upper plate material 12 is captured in these four parts. A convex portion is provided at the center of the top surface of the power element 10, and this convex portion engages with a concave portion provided on the lower surface of the top of the upper lid body 8 screwed into the annular wall of the valve body 1. A large number of through openings 8a are provided in the side wall of the lid body 8 (FIG. 3).
.

Note that the above power element 10 and coil spring 2
constitutes a temperature-compensated elastic means, which includes the adjustment spring 15, the cap, the upper and lower plates 12, 17, and the slide pin 1.
1 constitutes a pressure adjusting means.

Next, the operation of the above embodiment will be explained.

The power element 10 is a bellows in which a gas body is sealed, and when the outside temperature rises, the bellows expands due to the expansion of this gas body and generates a pressing pressure.

For example, when carbon dioxide gas is consumed to supply beer, the pressure in the outlet flow path 1o decreases, so the coil spring 1
3 connects the valve body 4 via the diaphragm 7 to the coil spring 2
Overcome 0 and push downward. Then, the valve plate 3 separates from the valve seat 2a, and carbon dioxide gas is supplied from the inlet side flow path 11 through the outlet side flow path 1o (FIG. 3). When the pressure in the flow path 1o on the outlet side exceeds the set value, the diaphragm 7 pushes up the coil spring 13, so the valve body 4 is returned by the coil spring 20, so that the valve plate 3 is seated on the valve seat 2a, Cut off the supply of carbon dioxide.

The set value can be adjusted by the degree of screwing in of the adjustment cap 14, but since the power element 10 is additionally provided, temperature compensation is achieved.

In other words, when the outside temperature rises, the power element 10
As the pressing pressure of the coil spring 13 increases, the pressure for the diaphragm 7 to push back the latter increases, and therefore the pressure in the flow path 1o on the outlet side increases, and the solubility of carbon dioxide in the beer decreases as the temperature increases. They will be compensated.

Furthermore, when the temperature decreases, the pushing pressure of the power element 10 decreases, so the pressure of the diaphragm 7 pushing back the coil spring 13 decreases, and the relief valve seat 6 separates from the relief valve plate 5, causing the opening of the diaphragm 7 and Opening 8 of upper lid body 8
is released into the atmosphere through a.

Also, when replacing the beer tank, adjust the adjustment cap 14.
If the coil spring 13 is screwed in sufficiently, the coil spring 13 will be loosened, so that the pressure of the diaphragm 7 pushing back the latter will be sufficiently low.
The relief valve seat 6 is separated from the relief valve plate 5 and the residual pressure can be completely released.

In addition, since the power element 10 is supported via the convex portion and the sphere 9, the valve body 1 is expanded due to adiabatic expansion of the gas.
etc. are hardly affected by this even if they are cooled.

[Effect of the invention] It is possible to automatically increase or decrease the pressure in the outlet side flow path leading to the beer tank according to changes in the outside air temperature, and at the same outside air temperature, the pressure in the outlet side flow path can be adjusted accurately. Since it can be adjusted to a constant value and the pressure in the outlet side flow path can be easily lowered to atmospheric pressure, the beer tank can be easily replaced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the pressure regulating valve of the present invention. 2 is a top view showing the inside of the pressure regulating valve of FIG. 1; FIG. FIG. 3 is a side view of the pressure regulating valve shown in FIG. 1; 4 is a cross-sectional view showing one operating state of the pressure regulating valve of FIG. 1; FIG. 5 is a cross-sectional view showing different operating states of the pressure regulating valve of FIG. 1; FIG. FIG. 6 is a cross-sectional view of a conventional pressure regulating valve. FIG. 7 is a diagram schematically showing one mode of use of the pressure regulating valve. DESCRIPTION OF SYMBOLS 1... Valve body, ■... Inlet side flow path, 10... Outlet side flow path, 2... Valve seat body, 2a... Pressure regulating valve seat, 3...
Valve seat plate, 4... Valve body, 5... Relief valve plate, 6... Relief valve seat, 7... Diaphragm, 8... Upper lid body, 9
... Sphere, 10... Power element, 11...
Pin, 13.20...Coil spring, 14...Adjustment cap, 15...Adjustment spring.

Claims (1)

[Claims] (1) A flow path that communicates the inlet and outlet is provided in a valve body provided with an inlet and an outlet, and a valve seat body having a valve seat is provided in the flow path, and the valve seat body is slidable on the valve seat body. A valve member is provided at the valve member, and the valve member is biased toward the valve seat by a first elastic means, so that a pressing force is applied to the valve member by a pressure adjusting means in a direction that overcomes the force on the first elastic means. ,
The pressure regulating means includes a diaphragm that isolates the flow path within the valve body from the atmosphere and is provided with an opening that is opened and closed by the valve body, and an atmospheric temperature compensated second elastic member that presses the diaphragm toward the valve body. and an adjusting means for adjusting the elastic force of the second elastic means.