JPH0341507A - Pressure regulating valve - Google Patents

Abstract

PURPOSE:To automatically regulate the increment/decrement of feeding pressure in accordance with a change in the temperature of a part to which feeding pressure of gas or the like is applied by forming a communicating path for allowing outlet pressure to escape into the atmosphere in a valve rod moved in accordance with the sensitive operation of a power element at the time of separating the valve rod from a valve body. CONSTITUTION:The communicating path 40 for communicating the end face inner edge part of one end part engaged with a flowing port 18 so as to be optionally moved in the axial direction and adhesively abutted upon the valve body 23 to the other end arranged in atmo sphere is formed on the valve rod 37 penetrated and fixed into/on a diaphragm 31. Thereby, when the one end part of the valve rod 37 is stuck to the upper surface of the valve body 23 and the connection parth 40 is closed, pressing force received by the diaphragm 31 is balanced with the pressing force of the power element 52 by the pressing force of the power element 52, the tensile force of a regulating spring 66 and the pressure of a diaphragm room 34. When the pressing force of the power element 52 is changed in accordance with the temper ature sensitive state of a temperature sensing part 53 and increased against the valve spring 26 or the like, outlet pressure is increased, while being dropped when the pressing force is reduced. Consequently, feeding pressure can be regulated in accordance with a change in the temperature of the part to which the feeding pressure of gas or the like is applied.

Description

[Detailed description of the invention]

[Object of the Invention] (Industrial Application Field) The present invention relates to a three-way regulating valve that adjusts the supply pressure of gas or the like to a constant value. (Prior Art) For example, in a draft beer dispensing device, carbon dioxide gas is supplied from a cylinder into a beer barrel, and beer is dispensed from the beer barrel by the pressure of this carbon dioxide gas. A pressure regulating valve is interposed between the cylinder and the beer barrel to supply carbon dioxide gas at a constant pressure from the cylinder to the beer barrel. In a conventional pressure regulating valve, for example, as shown in FIG. 3, an inlet 1a communicating with a cylinder and an outlet 1b communicating with a beer barrel are formed in a valve body 1.
Distribution port 2 that communicates with b! and a valve seat body 2 having a valve seat 2b, and a valve seat 2 of this valve seat body 2.
A valve body 4 is provided which closes the outlet 1b by the biasing force of the valve spring 3, and the outlet 1b and the flow

[ ] Diaphragm 5 that constitutes a diaphragm chamber in a sealed state communicating with 2a on one side
is attached to the valve case 6, a valve rod 7 is provided on the diaphragm 5, which fits freely in the axial direction of the flow 1-12a and comes into contact with the valve body 4, and further an adjustment spring 8 is inserted into the valve. An adjustment cap 9 is screwed onto the threaded tube 6a of the case 6. When beer is poured out of the beer barrel, the pressure inside the beer barrel decreases. In response to this, the pressure at the outlet 1b of the pressure regulating valve decreases, and the force in the diaphragm chamber communicating with the outlet 1b decreases, causing the biasing force of the adjustment spring 8 to decrease. The diaphragm 1, 5 and the valve stem 7 are lowered, and the valve body 4 pushed up by the valve stem 7 is pushed onto the valve seat 2.
It moves away from b, the flow r, -12a opens, and the inlet 1a opens.
and the outflow port 1b communicate with each other, and carbon dioxide gas is supplied from the pump to the beer barrel. On the other hand, when carbon dioxide gas is supplied from the bong to the beer barrel, the pressure inside the beer barrel increases. Accordingly, the force on the outflow []lb side of the force adjustment valve increases, and the pressure in the diaphragm chamber communicating with the outflow []1b increases, causing the adjustment spring 8 to be biased. The diaphragm 5 and the valve stem 7 rise against the flow, and the valve body 2 is pushed up by the bias of the valve spring 3 and seats on the valve b, thereby blocking the flow 2a and stopping the supply of carbon dioxide gas. (Problems to be Solved by the Invention) In the conventional pressure regulating valve as described above, the biasing force of the regulating spring 8 is adjusted depending on the degree of screwing of the regulating cap 9, and the amount of carbon dioxide gas supplied to the beer barrel is adjusted. L[force can be adjusted arbitrarily.By the way, by supplying carbon dioxide gas into a beer barrel, carbon dioxide gas is dissolved in beer, but the solubility of this carbon dioxide gas is different from that in a beer barrel placed in the atmosphere. There is a difference depending on the temperature of the beer. Therefore, in order to keep the solubility of carbon dioxide constant, it is necessary to change and adjust the degree of screwing of the adjustment cap 9 according to the temperature of the beer, which takes time and effort. Furthermore, conventional pressure regulators emit carbon dioxide gas into the atmosphere.
Since there is no means for heating, it is not possible to adjust the FE power of carbon dioxide gas to a low level in response to changes in the temperature of the beer in the beer barrel. Therefore, in order to reduce the pressure inside the beer barrel, the only way to reduce the pressure is to remove γL of beer from the beer barrel, but at this time, excess carbon dioxide gas is dissolved in the beer, resulting in the problem of producing beer with excessive foam. Also, when replacing beer kegs, close the pressure reducing valve between the cylinder and the pressure adjustment valve, and then run the hose connected from the LF force adjustment valve to the beer keg so that the carbon dioxide gas is removed at once. The beer barrel had to be removed gradually to avoid the risk of it spewing out, and the pressure inside the beer barrel had to be gradually lowered to atmospheric pressure, and the replacement process took about an hour. The present invention has been made in view of these points, and aims to provide a pressure regulating valve that can adjust the supply IE force according to the temperature change of the pressure-supplied part such as gas. [Structure of the Invention] (Means for Solving the Problem) The invention of claim Outflow+
, 3 is formed with a valve seat 19 in the flow [, 8], and a valve body 23 that closes the valve seat 19 by the biasing force of a valve spring 26.
A diaphragm 31 is provided, which has a diaphragm chamber 34 on one side that communicates with the outflow [, 3 and the flow F, 8, and the other side is open to the atmosphere. A valve rod 37 that penetrates and is fixed to the diaphragm 31 is provided with an inner edge of an end surface of one end that fits freely in the flow 1-, 8 in the axial direction and makes tight neck contact with the valve body 23, and is marked in the atmosphere. A communication path 40 is provided that communicates with the other end. Further, an operating lever 55 is provided which moves in response to the responsive operation of the power element 52 that operates in response to the temperature sensing state of the temperature sensing section 53 that detects temperature, and presses the valve stem 37 from the other end in the axial direction. An adjustment spring 66 is provided, one end of which is connected to the operating lever 55 and urges the power element 52 in a direction opposite to the direction in which the valve stem 37 is pressed, and the other end of the adjustment spring 66 is connected. cam arm 7
1 is movable according to the position of contact with the adjustment cam 81 to adjust the biasing force of the adjustment spring 66. According to the second aspect of the invention, the cam arm 71 includes an actuating lever 55.
An engaging portion 78 is provided for forcibly moving the valve stem 37 in the opposite direction to the direction in which it is pressed. (Function) In the invention of claim 1, when the outlet pressure is at the set value, the valve body 23 is seated on the valve seat 19, and one end of the valve stem 37 is in close contact with the upper surface of the valve body 23, so that the communication passage 40 is closed, press 1 of the power element 52 "Force and
The tensile force of the adjustment spring 66, the pressing force applied to the diaphragm 31 by the 1L force of the diaphragm chamber 34, and the pressing force of the valve spring 26 are balanced. The pressing force of the power element 52 changes depending on the temperature sensing state of the temperature sensing section 53 installed in the wave pressure supply section. When the suppressing force of the power element 52 becomes larger than the adjustment spring 66, the diaphragm 31, and the valve spring 26, the valve rod 37 is pressed via the actuating lever 55, and the valve body 2
3 is separated from the valve seat 19, the inflow IJ 12 and the outflow IJ 13 are communicated through the flow port 18 and the diaphragm chamber 34, and the outlet pressure is increased. In addition, the power element 52 is held down by an adjustment spring 66.
When the valve rod 37 becomes smaller than the diaphragm 31, the valve stem 37 is pushed through the actuating lever 55. The power to do becomes weaker,
The valve rod 37 moves toward the other end of the diaphragm 31, and one end of the valve rod 37 separates from the valve body 23 seated on the valve seat 19, and the diaphragm chamber 34 is moved through the communication passage 40 of the valve rod 37. of the pressure is released into the atmosphere, and the pressure is lowered by 1. In the invention according to claim 2, the adjusting cam 81 is operated to move the cam arm 71 so that the engaging portion 78 is connected to the protrusion 64 of the operating lever 55. By engaging and forcibly moving the operating lever 55 in the direction of releasing the pressure on the valve stem 37, the valve stem 37 is moved toward the other end by the diaphragm 31 and is seated on the valve seat 19. The lower end of the valve stem 37 separates from the valve body 23, and the pressure in the diaphragm chamber 34 is released into the atmosphere through the communication passage 40 of the valve stem 37, and the pressure at the outlet becomes atmospheric pressure. 23 is maintained seated on the valve seat 19, the pressure on the inlet port 12 side is not released into the atmosphere. (Embodiment) The configuration of an embodiment of the present invention is shown in FIG. 1 and FIG. This will be explained with reference to Fig. 2. In Fig. 1, denotes a valve body, in which inflow [, 2 and outflow [, 3] are formed on both sides, and a recessed portion communicating with inflow [, 2] through an inflow passage 14 is formed in the center of the lower surface. 15 is hollowed out in the shape I, and a four part 17 is formed at the center of the upper surface that communicates with the outflow port 13 through the outflow passage 16, and this double concave N15.1
A flow passage J18 is provided on the partition wall 7, and a valve seat 19 is provided on the edge of the face of this flow flow J18. A lid 22 is attached to the recess 15 on the lower surface of the valve body, and a screw cylinder 21 is screwed into the inner periphery of the recess 15. A valve body 23 is placed inside the screw cylinder 21 of the lid 22, vertically and vertically. It is arranged so that it can be moved. The valve body 23 has a valve plate 25 attached to the upper surface of the cylindrical portion 24, which is seated on the valve seat 19.
A valve spring 26 is accommodated in the recessed portion of the lower surface of the valve spring 26 for pressing and biasing the valve plate 25 against the valve seat 19. In addition, between the valve body 23 and the valve spring, there is a screw that immediately raises the valve body 23 via a projection at the center of the upper surface so that the valve plate 25 is seated with equal pressure against the peripheral edge of the valve seat 19. 27 are arranged. A base 32 is attached to the upper surface of the valve body via a diaphragm 31 disposed within the recess I7. The diaphragm 31 has a peripheral portion that is a valve body and a base 3.
It is airtightly clamped and fixed with the annular protrusion 33 of No. 2, and
A diaphragm chamber 34 that communicates with the outflow port 13 and the flow port 18 is configured below the diaphragm 31, and a diaphragm chamber 36 that communicates with the atmosphere through the ventilation [ ] 35 of the base 32 is configured above the diaphragm 31. There is. A valve rod 37 is fixed through the diaphragm 31 . This valve rod 37 is hermetically fixed through a disk 38 that is joined to the upper and lower surfaces of the diaphragm 31, and its lower end fits into the flow port 18 so as to be vertically movable, and its upper end fits into the sliding hole 39 of the base 32. They are fitted so that they can move up and down. Further, a communication path 40 is formed that communicates the inner edge of the end surface of the lower end with the diaphragm chamber 36 on the upper side, and a recess 41 is formed in the upper end.
are provided, and an iron ball 42 is press-fitted and fixed into the four parts 41. A frame body 45 is provided on the top of the base 32. This frame 45 has one opposing side plate 46° 47 and the other opposing side plate 48 (in the figure, only this side plate 48 is shown, but the other opposing side plate is formed symmetrically with the side plate 48). It is configured into a rectangular frame, and an upper plate 49 is assembled on the upper surface of this rectangular frame. A power element 52 having a pushing portion 51 is attached to the inside of the side plate 46 of the frame 45. This power element 52 has a temperature sensing section 53 attached to the tube 5.
1, the inside of the power element 52 and the inside of the temperature sensing section 53 are communicated with each other, carbon dioxide gas is sealed inside the power element 52, and activated carbon is inside the temperature sensing section 53. It is enclosed. When the temperature of the temperature sensing part 53 rises, the internal force of the power element 52 increases due to the release of carbon dioxide gas by the activated carbon L; the force inside the power element 52 increases and the pushing part 51 protrudes; When the temperature of the power element 52 decreases, the internal pressure of the power element 52 decreases due to the adsorption effect of carbon dioxide gas by the activated carbon, and the pushing part 51 follows suit. An operating lever 55 is disposed inside the frame 45. This actuating lever 55 has legs 57 on both sides of the base 56.
A shaft piece 58 is movably fitted into a support hole 59 formed in the side plate 48, and held between the opposing side plates 48 in a co-moveable manner. A protrusion 60 that contacts the iron ball 41 of 37 is formed, and a protrusion 161 that contacts the pushing part 51 of the power element 52 is formed on the upper surface of the base 62.
is formed protrudingly, and a through hole 63 is formed in the rising part 62 raised from the base 5G.
A protrusion 64 is formed to protrude laterally from the upper end of the side edge of 2. Then, an adjusting screw 65 inserted and fitted into a through hole 63 in the upright part 62 is screwed into a nut 67 fitted and fixed inside one end of the adjusting spring 66, and the tension of the adjusting spring 66 causes the actuating lever to 55 is always urged to rotate counterclockwise in the figure. Further, a cam arm 71 is disposed inside the frame body 45. The cam arm 71 is rotatably supported between the opposing side plates 48 with shaft pieces 74 of the legs 73 on both sides of the base 72 rotatably fitted into support holes 75 formed in the side plates 48. A hook 76 on which the other end of the adjustment spring 66 is hooked is formed at the lower part of the base 72, and a protrusion 77 that protrudes from the upper surface of the upper plate 49 at the upper part of the base 72.
is formed, and furthermore, one leg portion 73 is provided with an actuation lever 5.
An engaging portion 78 is formed at the lower part of the protrusion 64 of No. 5 to enable engagement. The cam arm 71 is always urged to rotate clockwise in the figure by the tension of the adjustment spring 66. An adjustment cam 81 is disposed on the upper surface of the upper plate 49 of the frame body 45, and the projecting piece 77 of the cam arm 71 comes into contact with a cam surface on the peripheral edge. This adjusting cam 81 is rotated by an operating body 83 attached to the upper plate 49 by a spring plate 82, and the cam surface on the periphery is arranged such that the radius around the operating body 83 varies in the circumferential direction. and the cam arm 71
The co-movement (+'L position) of the cam arm 71 is adjusted according to the contact position of the cam surface of the adjustment cam 81 against the protrusion 77 of the cam arm 71, so that the tensile force of the adjustment spring 66 can be adjusted. The cam surface of the adjustment cam 81 is provided with a cam portion 4-f for venting to the atmosphere, which has a larger diameter than the cam surface within the range for adjusting the tensile force of the adjustment spring 66. When the adjusting cam 81 is operated simultaneously so as to contact the protruding piece 77, the cam arm 71 rotates significantly in the counterclockwise direction in the figure, and the engaging portion 78 of the cam arm 71
The actuating lever 55) engages with the protrusion 64, and the actuating lever
In Figure 55, make one strong movement in the counterclockwise direction,
The pressure on the valve stem 37 by the operating lever 55 is released. FIG. 2 shows an embodiment in which the pressure regulating valve configured as described above is applied to a beer dispensing device. In this beer pouring device, carbon dioxide gas is supplied from a cylinder 91 to an inflow port 12 to a pressure regulating valve via a pressure reducing valve 92, and a beer containing beer is supplied from an outflow port 13 of this pressure regulating valve A. Beer is supplied to the inside of the barrel 93, and beer is poured out from the beer barrel 93 to a cooler 94 under the pressure of carbon dioxide gas, and the beer cooled in the cooler 94 is poured into a beer dispenser "196" having a cock 95. The temperature sensing part 53 of the pressure regulating valve A is disposed in the distribution path through which beer is sent from the beer barrel 93 to the cooling RTR 94, and the temperature of the beer is detected. . Next, the operation of this embodiment will be explained. Now, when the internal pressure of the beer barrel 93 is at the set value, the valve plate 25 of the valve body 23 is seated on the valve seat 19, and
The lower end of the valve stem 37 is in close contact with the upper surface of the valve plate 25 and the communication passage 4
0 is closed, the pressing force of the power element 52, the tensile force of the adjustment spring 66, the suppressing force applied to the diaphragm 31 by the pressure of the diaphragm chamber 34, and the valve spring 2
The pressing force of 6 is balanced. The set value of the internal pressure of this beer barrel 93 is determined by the adjustment cam 81
Adjust the rotational position of the cam arm 71 with the adjustment spring 66.
It can be set arbitrarily by adjusting the tensile force. For example, when beer is poured out from the beer barrel 93 and the internal pressure of the beer barrel 93 decreases, the outlet pressure on the outlet 13 side of the pressure regulating valve A decreases, and the lower side communicating with the outlets L and 3 decreases. The pressure in the diaphragm chamber 34 decreases, the suppressing force applied to the diaphragm 31 weakens, and the pressing force of the power element 52 increases with respect to the adjustment spring 66, diaphragm 31, and valve spring 26, and the operating lever 55 moves downward. The valve stem 37 is rotated to hold down and lower the valve stem 37.
The valve body 23 is depressed at the lower end of the valve plate 25 and the valve seat 1
- The inflows 1-, 2, the flow port 18, the diaphragm chamber 34, and the outflows ``, 3'' are communicated with each other, and carbon dioxide gas is supplied to the inside of the beer barrel 93.In addition, the internal pressure of the beer barrel 93 is When the pressure rises to the set value, the outlet pressure on the outflow port 13 side to the pressure regulating valve increases, the pressure in the lower diaphragm chamber 34 communicating with this flow port 13 increases, and the pressing force applied to the diaphragm 31 becomes stronger. The valve rod 37 is pushed up against the pressing force of the power element 52, the valve body 23 is raised by the bias of the valve spring 26, the valve plate 25 is seated on the valve seat 19, and the inlet 12 and outlet 13 are connected. communication is cut off, and the supply of carbon dioxide gas to the beer barrel 93 is stopped. On the other hand, when the temperature of the beer inside the beer barrel 93 rises according to the outside temperature, the temperature sensing part 53 of the power element 52
As the temperature of the power element 52 increases, the activated carbon accommodated inside the temperature sensing portion 53 releases carbon dioxide gas, thereby increasing the internal pressure of the power element 52 and increasing the pressing force. Therefore, the pressing force of the power element 52 increases with respect to the adjustment spring 66, the diaphragm 31, and the flat spring 26, and as described above, the operating lever S5h is rotated in the direction of At the lower end of the rod 37, the valve body 23
is pushed down, the valve plate 25 is separated from the valve seat 19, the inflow, 2, circulation [, 8, diaphragm chamber 34, and the outlet 13 are communicated with each other, and carbon dioxide gas is supplied into the beer barrel 93. When the temperature of the beer inside the beer barrel 93 decreases according to the outside air temperature, the temperature of the temperature-sensing section 53 of the power element 52 decreases, and the activated carbon housed inside the temperature-sensing section 53 adsorbs carbon dioxide gas. As a result, the internal pressure of the power element 52 decreases and the pushing IE force weakens.Therefore, the pushing force of the power element 52 becomes smaller with respect to the adjustment spring 66 and the diaphragm 31, and the operating lever 55
is rotated upward, the diaphragm 31 is displaced upward, the valve stem 37 is pushed up, and the lower end of the valve stem 37 is separated from the valve plate 25 of the valve body 23 seated on the valve seat 19. , carbon dioxide gas in the lower diaphragm chamber 34 flows through the communication passage 40 of the valve stem 37 to the upper diaphragm chamber 3.
6, and from this diaphragm chamber 36 the vent 35
released into the atmosphere through In this way, the supply pressure of carbon dioxide gas to the beer barrel 93 can be automatically increased or decreased depending on the temperature of the beer in the beer barrel 93, so that the solubility of carbon dioxide gas in the beer can always be kept constant. . In addition, a beer barrel 93 set in the beer pouring device
Beer barrel 9 filled with beer after pouring beer from
3, by rotating the adjustment cam 81 and bringing the atmosphere release cam part into contact with the protrusion 77 of the cam arm 71, the cam arm 71 is rotated significantly upward.
The retaining portion 78 of the cam arm 71 is engaged with the protrusion 64 of the operating lever 55, and the operating lever 55 is forcibly rotated upward by a large amount. Therefore, the downward pressure on the valve stem 37 by the operating lever 55 is released, the diaphragm 31 is displaced upward, and the valve stem 37 is pushed up, and the valve plate 25 of the valve body 23 seated on the valve seat 19 is moved upward. The lower end of the valve stem 37 is separated, and the carbon dioxide gas in the lower diaphragm chamber 34 is released to the upper diaphragm chamber 36 through the communication passage 40 of the valve stem 37, and the ventilation 1 is released from the diaphragm chamber 36.
” 35 into the atmosphere. At this time, valve body 2
Since the valve plate 25 of No. 3 is kept seated on the valve seat 19, the carbon dioxide gas on the inflow 1] 12 side is not released into the atmosphere, and the outflow of carbon dioxide from the cylinder 91 is temporarily stopped.
There is no need to lose L. In this way, the carbon dioxide gas in the beer barrel 93 can be removed by the pressure regulating valve A, and the beer barrel 93 can be easily replaced without the need to temporarily close the cylinder 91. Note that [Y: Due to the setting of the adjustment cam 81 of the force adjustment valve A,
Even if the beer temperature is the same, the internal working force of the beer barrel 93 can be adjusted, so the solubility of carbon dioxide can be adjusted depending on the type of beer. [Effects of the Invention] According to the invention of claim 1, the valve stem is provided so as to be movable in accordance with the responsive operation of the power element, and when the valve stem separates from the valve body, the output L1) torque is released into the atmosphere. Since a communication path is provided for escaping, the supply pressure can be dynamically adjusted to increase or decrease in accordance with the temperature change of the 1+-rg force supply section such as gas. According to the second aspect of the invention, the adjusting cam is operated to move the cam arm to engage the engaging portion with the protrusion of the operating lever;
By forcibly moving the operating lever in the direction of releasing the valve stem 1r, pressure is released through the flow path of the valve stem, and the valve stem 1r is released. ．． Since the IIE force can be easily lowered to the atmosphere, and the valve body remains seated on the valve seat, the LL force of the inflow I-1 (, ) is released into the atmosphere. Can prevent 1F.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the pressure regulating valve of the present invention;
FIG. 2 is a schematic view showing the state of use, and FIG. 3 is a sectional view of a conventional pressure regulating valve. ,... Valve body, 12... Inlet, 13... Outlet, 18
・・Flow port, 19・・Valve seat, 23・・Valve body, 26・Valve spring, 31・・Diaphragm, 34・・Diaphragm chamber,
37... Valve stem, 40... Communication path, 52... Power element, 53... Temperature sensing part, 55... Operated, <-66.
・Adjustment spring, 71...Cam arm, 78...Engagement part, 8
1.Adjustment cam.

Claims (2)

[Claims] (1) A valve body that forms an inlet and an outlet, and a valve seat formed in the flow port that communicates the inlet and the outlet, and a valve body that closes the valve seat by the bias of a valve spring. , a diaphragm having a diaphragm chamber formed on one side that communicates with the outlet and the flow port and the other side open to the atmosphere, and a valve body that is fixed through the diaphragm and fitted in the flow port so as to be freely movable in the axial direction. a valve stem having a communication path that communicates the inner edge of the end face of one end that is in close contact with the other end that is placed in the atmosphere; a power element; an actuating lever that moves in response to the responsive action of the power element to press the valve stem from the other end in the axial direction; The power element includes an adjustment spring that biases in the direction of the power element, and a cam arm to which the other end of the adjustment spring is connected and that moves according to the position of contact with the adjustment cam to adjust the biasing force of the adjustment spring. Features a pressure regulating valve. (2) The pressure regulating valve according to claim 1, wherein the cam arm is provided with an engaging portion that engages with the operating lever and forcibly moves in a direction opposite to the direction in which the valve stem is pressed.