JP3392935B2 - Pressure regulating valve - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid pipe for supplying hot water to a hot / water mixer tap of a hot water supply equipment such as a kitchen, a washroom or a bathroom in a home. It relates to a pressure regulating valve installed in a system. [0002] For example, when supplying water to a hot / water mixer tap of a hot water supply system installed in a kitchen or a bathroom in a general household, the pressure of water supplied from a water supply piping system such as a water supply,
2. Description of the Related Art A pressure regulating valve is provided to prevent a change in the temperature of hot water discharged from a hot-water mixer tap due to a pressure difference between the hot water supplied from a hot water supply pipe system of a water heater and the like. Conventionally, in this type of pressure regulating valve, as shown in FIGS. 2 and 3 , for example, a first piping system such as a water supply piping system for supplying water C / W from water or the like to a cylinder housing 1 is provided. A first inflow port 2 to be connected and a second inflow port 3 to which a hot water supply pipe system for supplying hot water H / W heated and heated by a water heater are connected to be opened to the primary side; A cylinder 4 and a piston 5 slidably provided in the cylinder 4 are incorporated in the cylinder housing 1, and the first fluid chamber (pressure regulation chamber) 6 and the second And first and second outlets 8 and 9 communicating with the first and second fluid chambers 6 and 7 are opened to the secondary side, respectively. Some have a configuration. That is, in the pressure regulating valve having such a conventional structure, the water C · W supplied from the first fluid port 2 is provided in the first annular flow path 11 formed in the housing 1 and the cylinder 4. The fluid flows into the first fluid chamber 6 through the first cylinder hole 41 and the circumferential groove 42 and through a plurality of first piston holes 51 provided in the circumferential direction of the piston 5. Is discharged from the first outflow port 8. On the other hand, the hot water H supplied from the second fluid port 3
A second annular channel 12 in which W is formed in the housing 1
And a second cylinder hole 43 and a circumferential groove 44 provided in the cylinder 4, and a plurality of second piston holes 52 provided in the circumferential direction of the piston 5 to flow into the second fluid chamber 7. The hot water H · W from the second piping system is discharged from the second outlet 9 through the second flow path. The solid arrows in FIG. 3 indicate the supply / discharge flow of the hot water H · W. It shows a road. When a pressure difference is generated between the first fluid chamber 6 and the second fluid chamber 7, the piston 5 moves from the high pressure side to the low pressure side as shown by a solid arrow in FIG. The movement of the piston 5 changes the substantial opening area of each of the piston holes 51 and 52, whereby the first and second piston holes 51 and 52 are changed.
The pressure difference between the first fluid chamber 6 and the second fluid chamber 7 is eliminated by changing the ratio of the amount of fluid flowing into the fluid chambers 6 and 7 and the ratio of the pressure loss of the flowing fluid. It is something that can be done. FIG. 2 shows that, for example, the pressure in the first fluid chamber 6 becomes higher than the pressure in the second fluid chamber 7 and the piston 5
Shows a state after moving to the second fluid chamber 7 side,
In this state, since the substantial opening area of the piston hole 51 on the first fluid chamber 6 side is reduced, the pressure loss increases, and the inside of the first fluid chamber 6 and the interior of the second fluid chamber 7 are reduced. Pressures are equal. Further, the second fluid chamber from the state shown in FIG. 2 7
When the internal pressure increases, the piston 5 moves to the first fluid chamber 6 side to eliminate the pressure difference between the first fluid chamber 6 and the second fluid chamber 7, whereby the water pressure and the hot water Pressure regulation control is performed. However, in the pressure regulating valve having the above-described conventional structure, if the clearance between the cylinder 4 and the piston 5 is small, fine floating substances in the fluid may be clogged, or the cylinder 4 and the piston The piston 5 sticks to the cylinder 4 due to crevice corrosion or the like,
Operation failure occurs and pressure regulation control becomes impossible, resulting in low reliability. If the clearance between the cylinder 4 and the piston 5 is large, the fluid in the fluid chamber on the high pressure side tends to leak into the other fluid chamber, so that the confidentiality between the two fluid chambers is low. there were. SUMMARY OF THE INVENTION An object of the present invention is to provide a pressure regulating valve which is highly reliable and has high confidentiality between both fluid chambers. [0012] To achieve the Means for Solving the Problems] above object, the present invention, a first inlet connected to the first piping system is open mouth on the primary side, the first the first flow path formed by ejected from the first outlet of the first fluid was opened to the secondary side through the first valve hole supplied from the inlet, before
While Ru is provided a first valve body for opening and closing the serial first valve hole, primary
A second inlet connected to the second piping system on the side to open the mouth, the second fluid supplied from the second inlet the second
Opening and closing the second valve hole in a second flow path discharged from the second outlet port opened to the secondary side through the valve hole of
A pressure regulating valve provided with a second valve element , wherein a first fluid chamber communicating with the secondary side of the first flow path through the first valve element; A pressure regulating chamber including a second fluid chamber communicating with the second valve body via the second valve body is provided on the next side, and the first fluid chamber and the second fluid chamber of the pressure regulating chamber are connected to the first and second fluid chambers. 2
And a diaphragm interlocked with the valve body of the first fluid chamber, and the diaphragm is operated by a pressure difference between the fluid pressure on the first fluid chamber side and the fluid pressure on the second fluid chamber side. The first and second valve bodies are interlocked with each other in a direction to open and close the first and second flow paths alternately,
When the fluid pressure on the fluid chamber side becomes larger than the fluid pressure on the second fluid chamber side, the second valve body is moved in the direction in which the first valve body closes the first flow path. Operable in a direction to open the first flow path, and the first flow path in the first flow path
Of the second valve body in the flow path on the downstream side of the valve body and the second flow path
The first and second communication paths communicating with the downstream flow path
The first and second communication passages are respectively provided in the first and second communication paths.
Or excessive pressure generated on the side of the second flow path
The overpressure relief valve for relief is provided . According to the present invention, by adopting the above structure, when a pressure difference occurs between the first fluid chamber and the second fluid chamber in the pressure regulating chamber, the diaphragm moves from the high pressure side to the low pressure side. The first and second valve bodies operate in such a manner as to alternately open and close the first and second flow paths, respectively, in conjunction with the deformation of the diaphragm.
In order to increase or decrease the flow path area of the flow path of the first or second flow path,
When the flow path area of the flow path increases or decreases, the ratio of the amount of fluid flowing into the first and second fluid chambers and the ratio of the pressure loss of the flowing fluid changes, whereby the first fluid chamber and the second Of the pressure in the fluid chamber is eliminated. That is, the fluid pressure on the first fluid chamber side is the second fluid pressure.
When the fluid pressure becomes higher than the fluid pressure on the fluid chamber side of the first fluid chamber, the first valve body moves in a direction to close the first flow path, the amount of fluid flowing into the first fluid chamber decreases, and The pressure loss of the fluid flowing into the first fluid chamber increases, and the fluid pressure on the first fluid chamber side decreases. On the other hand, the second valve body moves in a direction to open the second flow path, and flows into the second fluid chamber. As the amount of fluid flowing increases, the pressure loss of the fluid flowing into the second fluid chamber decreases, and the fluid pressure on the side of the second fluid chamber increases. This is to eliminate the pressure difference between the fluid chamber. If the fluid pressure on the first fluid chamber side becomes abnormally higher than the fluid pressure on the second fluid chamber side, the first
By completely closing the flow path with the first valve body, the inflow of the fluid is stopped, so that damage to the pressure regulating valve itself and devices subsequent to the pressure regulating valve are prevented. Further, since the first fluid chamber and the second fluid chamber in the pressure regulation chamber are water-tightly partitioned by the diaphragm, the confidentiality between the two fluid chambers is high, and the pressure side is higher. The fluid in the fluid chamber does not leak to the other fluid chamber. Further, when the fluid pressure on the secondary side becomes abnormally high, the diaphragm that partitions the two fluid chambers may exceed the operating limit and break, but the downstream side of the first flow path may be damaged. The first and second communication passages are provided respectively for communicating the first and second communication passages with the downstream flow passage of the second flow passage, and the first and second communication passages are provided on the first or second flow passage side. The first and second overpressure relief valves are provided in the other flow path to release the generated excessive pressure, so that the pressure in the first or second flow path (first or second fluid chamber) is reduced. Because it can be lowered, breakage of the diaphragm beyond its operational limits is prevented. Embodiments of the present invention will be described below in detail with reference to the drawings shown in FIG. 1. FIG. 1 shows a first embodiment according to the present invention. This is a differential pressure regulating valve used for a piping system such as a hot water mixing tap. The pressure regulating valve 100 has a first inlet 110 connected to a water supply piping system C / W such as water supply, and a second inlet connected to a hot water supply piping system H / W such as a water heater. 120 is open to the primary side and these first and second inlets 110,
First and second outlets 1 from which water and hot water are opened to the secondary side from 120 through first and second flow paths 111 and 121.
The ink is ejected from 12, 12 respectively. A first valve hole 113 is provided on the way of the flow path 111 from the first outlet 112, and the first valve hole 113 The first valve element 114 disposed on the next side can be opened and closed freely, and the first valve element 114
Through the first fluid chamber 131A of the pressure regulating chamber 130 to be described later.
This valve stem 1 is connected to a common valve stem 115 facing the side.
By operating the valve element 114 in the opening and closing direction by the up and down movement of the valve 15, the valve hole 113 can be opened or closed. On the other hand, a second valve hole 123 is provided in the middle of the flow path 121 from the second outlet port 120, and the second valve hole 123 is connected to the second flow path 121. The second valve element 124 disposed on the next side is openable and closable, and the second valve element 124 is connected to a pressure regulating chamber 1 described later.
30 from the second fluid chamber 131B side to a common valve stem 115 facing through the valve hole 123, and this valve stem 1
The valve hole 123 can be opened or closed by operating the valve body 124 in the opening and closing direction by the up and down movement of the valve 15. That is, the pressure regulation chamber 130 is provided with the first
A first fluid chamber 131A as a water chamber communicating with the secondary side of the flow path 111 via a first valve element 114, and communicating with the second flow path 121 via a second valve element 124. A second fluid chamber 131B serving as a hot water chamber is partitioned in a watertight manner by a diaphragm 132, and the first valve body 114 and the second valve body 12 are provided in the diaphragm 132.
A valve stem 115 for alternately opening and closing 4 is connected to be interlockable. However, according to the above configuration, when the hot water pressure P2 on the hot water chamber (second fluid chamber) 131B side of the pressure adjusting chamber 130 provided in the pressure adjusting valve 100 becomes lower due to hot water discharged from another place, water is generated. Due to the pressure difference between the water pressure P1 on the chamber (first fluid chamber) 131A side, the diaphragm 131 is deformed upward so as to project from the water chamber 131A on the high pressure side to the hot water chamber 131B on the low pressure side. Then, the valve stem 115 is moved upward, whereby the first valve element 114 operates in the direction to close the first valve hole 113, that is, the direction to close the first flow path 111, and the second valve element 124 Is a direction in which the second valve hole 123 is opened,
That is, it operates in a direction to open the second flow path 121. As described above, when the first valve element 114 operates in the direction to close the first flow path 111, the flow rate of the water C · W flowing into the water chamber 131A decreases, and the pressure of the flowing fluid increases. The loss increases and the water pressure P on the water chamber 131A side increases.
1 decreases, while the second valve body 112
1, the flow rate of the hot water H · W flowing into the hot water chamber 131B increases, the pressure loss of the flowing fluid decreases, the hot water pressure P2 on the hot water chamber 131B side increases, and Since the water pressure P1 on the chamber 131A side and the water pressure P2 on the hot water chamber 131B are balanced, the pressure difference between the water chamber 131A and the hot water chamber 131B is eliminated, thereby mixing the hot and cold water connected downstream thereof. The control can be performed so as to prevent a change in the temperature of tap water from a tap (not shown). [0025] In addition, in the pressure regulating valve of the differential type according to this invention
Includes a downstream side of the flow path of the first valve body 114 in the first flow path 111, the first and between the downstream side of the flow path of the second valve element 124 in the second flow path 121 Second communication path 1
41, 142 are provided, and relief valves 151, 152 are provided in the first and second communication passages 141, 142. The first and second relief valves 151, 152 are The first or second flow path 112,
An excessive differential pressure generated on the side 121 is released to the outlet 122 or 112 on the secondary side of the other flow path 111 or 121. Then, such relief valves 151, 152
Prevents an excessive differential pressure from being applied to the diaphragm 132, whereby the diaphragm 1
Damage beyond the operating limit of 32 is prevented. As is apparent from the above description, the present invention has a first inlet connected to the first piping system on the primary side .
Was open mouth, first the first channel formed by discharged from the outlet of which is opened to the secondary side through the first valve hole the first fluid supplied from the first inlet The first valve hole
While Ru is provided a first valve body for opening and closing, the second inlet being connected to the second piping system is open mouth on the primary side, the second fluid supplied from the second inlet the A second outlet discharged from a second outlet opened to the secondary side through the second valve hole .
A second valve element for opening and closing the second valve hole in the flow path
It is other pressure regulating valve, the first to the secondary side of the first flow path
A pressure regulating chamber comprising a first fluid chamber communicating through the valve body of the second fluid chamber and a second fluid chamber communicating through the second valve body on the secondary side of the second flow path; The first fluid chamber and the second fluid chamber of the pressure regulating chamber are water-tightly partitioned by a diaphragm interlocked with the first and second valve bodies, and the diaphragm is provided in the first fluid chamber. The first and second valve bodies are moved in a direction in which the first and second flow paths are alternately opened and closed by an operation based on a pressure difference between the fluid pressure on the fluid side and the fluid pressure on the second fluid chamber. When the fluid pressure on the first fluid chamber side becomes higher than the fluid pressure on the second fluid chamber side, the first valve body is moved in the direction to close the first flow path, and A valve element is operable in a direction to open the second flow path, and a flow path on the downstream side of the first valve element in the first flow path.
And the second flow path downstream of the second valve body in the second flow path.
First and second communication paths are provided, respectively,
In the first and second communication paths, on the first or second flow path side
Install an overpressure relief valve to release the excessive pressure generated to the other flow path.
It is characterized in that Accordingly, when a pressure difference occurs between the first fluid chamber and the second fluid chamber in the pressure regulation chamber, the diaphragm is deformed so as to project from the high pressure side to the low pressure side, and the diaphragm is deformed in conjunction with the deformation of the diaphragm. The first and second valve bodies operate in the direction to open and close the first flow path, and flow into the first and second fluid chambers to increase or decrease the flow area of the first and second flow paths. It is possible to change the ratio of the amount of fluid flowing and the ratio of the pressure loss of the flowing fluid. Thus, the pressure difference between the first fluid chamber and the second fluid chamber can be eliminated.
When the fluid pressure on the fluid chamber side becomes abnormally higher than the fluid pressure on the second fluid chamber side, the first flow path is completely closed by the first valve body, thereby inflow of fluid. Can be stopped, so that damage to the pressure regulating valve itself and devices subsequent to the pressure regulating valve can be prevented, and reliability can be improved. Further, since the first fluid chamber and the second fluid chamber are water-tightly partitioned by the diaphragm, the confidentiality between the two fluid chambers can be enhanced, and the fluid on the high pressure side can be increased. The fluid in the chamber does not leak to the other fluid chamber. Further , as described above, the flow path on the downstream side of the first valve body in the first flow path and the first flow path in the second flow path
First and second communication paths communicating with the flow path on the downstream side of the valve body are provided, and excessive pressure generated on the first or second flow path side is applied to the first and second communication paths. First and second overpressure relief valves are provided to release to the second or first flow path, respectively.
Because there, the first or second flow path when the pressure in (first or second fluid chamber) becomes abnormally high, first or second flow paths (first or second fluid chamber) Since the pressure of the diaphragm can be reduced, it is possible to prevent the diaphragm from being broken beyond the operation limit.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view showing the actual施例of the pressure regulating valve according to the present invention. FIG. 2 is a schematic sectional view showing an example of a conventional pressure regulating valve . FIG. 3 is a sectional view taken along line AA of FIG . 2 ; [Description of Signs] 100: pressure regulating valve, 110: first inlet, 111: first
Channel 112, a first outlet 113, a first valve hole,
114: first valve body, 115: valve stem, 120: second inlet, 121: second flow path, 122: second outlet, 1
23 ... second valve hole, 124 ... second valve element, 130 ... pressure regulating chamber, 131A ... first fluid chamber, 131B ... second fluid chamber, 132 ... diaphragm, 141 ... first communication path, 1
42 ... second communication passage, 151 ... first relief valve, 152 ...
Second relief valve, C / W: first piping system (water supply piping system),
HW: Second piping system (hot water supply piping system).

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16K 17/22 F16K 11/00

Claims (1)

(57) [Claim 1] A first pipe connected to a first piping system on a primary side .
Of the inlet is open mouth, first made by discharging from a first outlet which is opened to the secondary side through the first valve hole the first fluid supplied from the first inlet The first channel
While Ru is provided a first valve body for opening and closing the valve hole, a second inlet connected to the second piping system is open mouth to the primary side, a second supplied from the second inlet the fluid first
The second valve hole is opened and closed in a second flow path discharged from the second outlet port opened to the secondary side through the second valve hole.
A pressure regulating valve provided with a second valve body , wherein: a first fluid chamber communicating with a secondary side of the first flow path via the first valve body; The second on the secondary side
And a second fluid chamber communicating with the first fluid chamber via the valve body. The first fluid chamber and the second fluid chamber of the pressure chamber are connected to each other by the first fluid chamber.
And a diaphragm interlocked with a second valve element to partition in a water-tight manner, and the diaphragm operates by a pressure difference between a fluid pressure on the first fluid chamber side and a fluid pressure on the second fluid chamber side. In the above, the first and second valve bodies are interlocked in a direction in which the first and second flow paths are alternately opened and closed, and the fluid pressure on the first fluid chamber side is on the second fluid chamber side. becomes greater than the fluid pressure, the the first valve body in a direction closing the first flow path, and the second valve body operable respectively in the opening direction of the second flow path, said first The flow path on the downstream side of the first valve body in the first flow path and the second flow path
The second flow path communicates with the flow path downstream of the second valve element.
First and second communication paths are provided, respectively, and the first or second communication paths are provided in these first and second communication paths.
Overpressure relief that releases excessive pressure generated on the flow path side to the other flow path
It is that the pressure regulating valve, characterized in that the the valve is provided.