The present invention relates to pressure regulators and more particularly, relates to a quick fill device for a pressure regulator.
Residential and commercial boilers, water heater, and the like 1,
It is often necessary to add water to the boiler 1. For example, during routine maintenance, it is often necessary to drain the boiler 1 using the drain valve 2 in order to relieve the pressure within the boiler 1 as well as to remove the heated water within the boiler 1. Additionally, water must often be added due to leakage, evaporation, normal operation, and other causes.
Pressure regulators 12 are typically located proximate a boiler 1 on the inlet water line 3. The pressure regulator 12 controls the amount of water/pressure within the boiler 1 by automatically adding water in the event the pressure within the boiler 1 drops below a predetermined threshold (typically approximately 12 psi). The pressure relief valve 4 serves to prevent the pressure within the boiler 1 from exceeding the maximum allowable operating pressure.
The incoming water, typically coming from the main water line located in the street, is often at a pressure significantly higher (typically in the range of approximately 20-80 psi than the 12-15 psi range that the boiler 1 operates in. The pressure regulator 12, (
Most known pressure regulators 12 include a pressure device 14 comprising a spring 16 and a diaphragm 18. The spring 18 biases against the diaphragm 18 urging the valve 20 open. The pressure within the outlet 24 acts against the diaphragm 18, urging the valve 20 closed. When the pressure within the outlet 24 is above the threshold value, the outlet pressure 24 is greater than the pressure generated by the spring 18, and the valve 20 remains closed. However, when the outlet pressure 24 drops below the threshold value, spring force 18 begins to open the valve 20, thus allowing water to pass through the pressure regulator 12 and into the boiler 1.
As discussed above, water heaters and the like 1 include relief valves 4,
It is important to note, however, that the valves 20 of the known pressure regulators 12 and the known relief valves 4 open in direct relationship to the pressure differential between the outlet pressure 24/inlet pressure 22 and the spring pressure 18 respectively. The larger the pressure differential (i.e., the lower the outlet pressure 24 compared to the spring pressure 16 in the case of the pressure regulator 12 and the higher the inlet pressure 22 compared to the spring pressure 16 in the case of the relief valve 4), the more the valve 20 opens.
In the case of the known pressure regulators 12, this arrangement allows water from the high-pressure main water line 3 to slowly enter the boiler 1. Unfortunately, it significantly increases the time it takes to fill the boiler 1, particularly when the boiler 1 is empty. As the outlet pressure 24 begins to reach the threshold value (i.e., 12 psi), the valve 20 is gradually closed. As a result, the flow rate of the water entering the boiler 1 is gradually decreased, and the time to fill the boiler 1 is significantly increased. This is particularly a problem when the boiler 1 has been emptied (for example if a new boiler 1 is being installed or the boiler 1 has been drained for maintenance reasons). Yet another problem is that that it is often necessary to fill boiler 1 with water to a pressure above the minimum threshold value of the pressure regulator 12 in order to purge any entrapped air from the boiler 1 as well as the pipes.
To overcome this problem, a pressure regulator override lever 15 is typically installed on the pressure regulator 12. The pressure regulator override lever 15 typically includes a lever 17 and a rod 19. The rod 19 is connected to the lever 17 and the diaphragm 18. When the lever 17 is moved in the direction of arrow A, the lever 19 is forced downward which thereby moves the diaphragm 18 downward. This effectively overrides the outlet pressure 24, thereby fully opening the valve 20 and allowing the water from the main water line 3 to enter the boiler 1 at a much higher rate, thus filling the boiler 1 in a much shorter amount of time.
Unfortunately, this arrangement suffers from several problems. One problem is that the valve 20 will remain fully open at all times until the operator manually closes the valve 20. Because the main water line 3 has a pressure typically between 20-80 psi, if the valve 20 is not shut, water will enter the boiler 1 until the boiler 1 reaches in excess of approximately 30 psi. However, the pressure relief valve 4 will open at approximately 30 psi (the typical maximum operating pressure for the boiler 1). As a result, high-pressure water and/or boiling water will be suddenly released from the pressure relief valve 4. Not only will the high-pressure water damage property and create a mess as the exits the relief valve 4, it can also cause severe injury (such as severe burning) to people near the boiler 1, especially if someone is near the relief valve 4 when it opens. Moreover, if the pressure relief valve 4 malfunctions or is inadequate to handle the flow rate of the water entering the boiler 1, the boiler 1 could also be damaged and could even possibly explode.
While it is possible to manually close the pressure regulator override lever 15 prior to the relief valve 4 opening, this is often very difficult because the pressure gauge 6 is typically located far away from the pressure regulator override lever 15 and is difficult to observe. Moreover, it is common for the person working on the boiler 1 to forget that the boiler 1 is filling, and thus forget to close the pressure regulator override lever 15.
In the case of the known relief valves 4, the gradual opening of the relief valve 4 also suffers from several problems. In the event of a large, rapid pressure spike, the relief valve 4 may not open sufficiently fast enough to relief the pressure. This could ultimately result in damage to the water heater/boiler 1. Accordingly, the known relief valves 4 must be large in order to relief or discharge enough BTUs or steam capacity/volume.
Accordingly, what is needed is a device that is capable of quickly filling the boiler, water heater, or the like and/or quickly relieving pressure. According to one embodiment, the device should fully open the valve until the outlet pressure reaches a predetermined maximum value (which is preferably set below the maximum pressure of the pressure relief valve) upon which pressure regulator valve should immediately close. According to another embodiment, the device should fully open the valve once the pressure exceeds a predetermined threshold. The device should also be capable of being retrofitted to existing pressure regulators or relief valves without extensive modification. Additionally, the device should be capable of relieving or discharging a larger amount of BTUs, steam capacity/volume, or the like compared to the known valves.
The present invention solves all of the problems with the prior art. According to one embodiment, a valve device overrides a pressure regulator, thereby allowing a boiler to be filled quickly and easily. According to another embodiment, the valve device immediately and instantaneously opens the valve once the pressure exceeds a predetermined threshold. The device comprises a body defining a first cavity having a base region and an opening region. A plunger is sized and shaped to fit within the first cavity of the body such that a first end region of the plunger is adapted to disposed proximate the base region of the cavity. The plunger is preferably operatively connected to the pressure regulator or relief valve.
An actuator operatively connects the plunger and the body. According to one embodiment, the actuator fully opens the pressure regulator at all times when the outlet pressure of the pressure regulator is below a maximum pressure, and automatically fully closes the pressure regulator when the outlet pressure reaches the maximum pressure. Alternatively, the actuator fully closes the valve whenever the inlet pressure is below a maximum value, and instantly and fully opens the inlet pressure exceeds the maximum value.
In the exemplary embodiment, the cavity includes an indentation (such as a circumferential slot) disposed proximate the opening region. The indentation is sized to accept a portion of a ball or bearing. The second end region of the plunger preferably includes a notch region and a guide region sized and shaped to accept a portion of the ball. The guide region forms a ramp and preferably includes a channel. The guide region is disposed within the plunger such that a first end of the guide region is proximate an outer surface of the plunger and a second end of the guide region is disposed proximate the second end region of the plunger within the notch region.
The device preferably further includes a biasing mechanism (such as a spring) disposed within the first cavity between the base region of the body and the first end region of the plunger. Additionally, the device preferably further includes a cap sized and shaped to fit within the first cavity. The cap defines a second cavity having an upper surface and a bottom surface. The upper surface is sized and shaped to fit within the notch region of plunger such that the upper surface contacts the ball.
These and other features and advantages of the present invention will be better understood by reading the following detailed description, taken together with the drawings wherein:
A valve controller 10,
The valve controller 10 may work with any pressure regulator 12, relief valve 4, or valve 20 in general. The pressure regulator 12,
While the valve controller 10 will work with virtually any pressure regulator 12 and pressure device 14, the pressure device 14 preferably includes a diaphragm 18 operatively connected to the valve 20 and a spring 16. The spring 18 biases against the diaphragm or cartridge device 18 urging the valve 20 open. The outlet pressure 24 acts against the diaphragm 18 and urges the valve 20 closed. When the outlet pressure 24 is above the threshold value, the outlet pressure 24 is greater than the pressure generated by the spring 18, and the valve 20 remains closed. However, when the outlet pressure 24 drops below the threshold value, spring force 18 begins to open the valve 20, thus allowing water to pass through the pressure regulator 12 and into the boiler 1.
The valve controller 10 is preferably operatively connected to the valve 20 in such a manner as to override the pressure device 14. In the preferred embodiment, the valve controller 10 is connected to a rod 19. This rod 19 is typically installed on most pressure regulators 12 for purposes of overriding the pressure regulator 12, and forcing the valve 20 open. Traditionally, the rod 19 is connected to a manual lever 17 (
According to one embodiment, lever 17 is removed from the pressure regulator 12, leaving the exposed rod 19. The valve controller 10 is then adapted to be connected to the rod 19 using any manner known to those skilled in the art. This allows the valve controller 10 to be easily retrofitted to existing pressure regulators 12. As will be discussed in greater detail hereinbelow, the valve controller 10 is preferably adapted to be removably secured to the pressure regulator 12 as well as the rod 19. Alternatively, the pressure regulator 12 may be manufactured in such a way to allow the valve controller 10 to be removably connected to the lever 19 and/or the valve 20.
In the exemplary embodiment, the valve controller 10 is secured to the rod 19 and the pressure regulator 12 (for example, but not limited to, threading the valve controller 10 to the pressure regulator 12). Once the valve controller 10 is operatively secured to the pressure regulator 12, the rod 19 is forced in the direction of arrow B, and the valve 20 is opened.
The valve controller 10,
The cavity 32 is sized and shaped to accept at least a portion of the plunger 34 and at least a portion of the cap 36, and includes a base region 33 and an opening region 35. The opening region 35,
The plunger 34,
An actuator in the form of, for example, a biasing mechanism 40,
The cap 36,
In practice, the valve controller 10 is secured to the pressure regulator 12 and urges the rod 19 downward in the direction of arrow B, thereby overriding the pressure regulator 12 and fully opening the valve 20 and allowing water to flow freely though the pressure regulator 12 and into the boiler 1. As the pressure within the boiler 1 increases, the force F exerted upwards (i.e., opposite the arrow B) by the pressure regulator 12 through the rod 19 also increases. Once the force F exerted by the pressure regulator 12 reaches a predetermined point (corresponding to the desired maximum fill pressure within the boiler 1), the downward pressure of the actuator/biasing mechanism 40 is overcome and the cap 36 and plunger 34 move from the position shown in
The force F exerted by the pressure regulator 12 through the rod 19 is transferred against the base/bottom surface 54 of the cap 36. The cap 36 transfers this force F through the leg/upper surface 52 of the cap 36 directly against the ball 38. The ball 38 is sandwiched partially within the groove 31 between the body 12 and the plunger 34. The biasing device 40 urges the plunger 34 downward, forcing the ball 38 within the groove 31.
Because the ball 38 is being forced within the groove 31 by the plunger 34, the force Fb necessary to drive or push the ball 38 out of the groove 31 is significantly higher than the force generated by the biasing device 40 alone. As a result, once the force F reaches the force Fb necessary to push the ball 38 out of the groove 31, the biasing device 40 is substantially instantly compressed and the plunger 34 and cap 36 are substantially instantly moved from the position shown in
In contrast to the known pressure regulators 12 alone (which open and close the valve 20 in relation to the pressure differential such that the valve 20 is fully open at large pressure differentials and begins to close as the pressure differential approaches zero), the valve controller 10 according to the present invention holds the valve 20 fully while the pressure within the boiler is lower than the desired maximum fill pressure and substantially instantly closes the valve 20 once the boiler 1 reaches the desired maximum fill pressure. Because the valve 20 remains fully open until the desired maximum fill pressure within the boiler 1 is reached, the amount of time necessary to fill the boiler 1 with water is substantially reduced. Moreover, because the valve controller 10 automatically closes upon reaching the desired maximum fill pressure, the pressure within the boiler 1 never exceeds the maximum pressure allow by the pressure relief valve 4, thus preventing the dangerous situation where hot, high pressure is released.
In an alternative embodiment, the valve controller 10,
According to the present invention, the rod 19 is operatively connected to the valve controller 10 and the valve controller 10 is secured to the relief valve 4 in substantially the manner as described above. The valve controller 10 operates in substantially the same manner as described above. The relief valve 4 preferably does not include the spring 16.
In practice, the valve controller 10 maintains the valve 20 in the closed position. As the inlet pressure 22 increases, the pressure is transferred through the rod 19 against the valve controller 10. Once the inlet pressure 22 exceeds a predetermined value, the valve controller 10 moves from the expanded position shown in
According to the preferred embodiment, the valve controller 10 preferably includes a manual opening device 87. The manual opening device 87 preferably includes a lever 85 pivotably disposed about an end region 86 of the stem/rod 19. The stem/rod 19 preferably includes a washer or flared region 88 disposed beneath the cap 36. As the lever 85 is rotated in the direction of the arrow H, the stem/rod 19 is moved upwards in the direction of the arrow F. The washer or flared region 88 is secured to the stem/rod 19 such that the Force F transferred by the lever 85 through the stem/rod 19 acts on the cap 36 as described above to contract the valve controller 10 as discussed above.
Modifications and substitutions by one of ordinary skill in the art are considered to be within the scope of the present invention, which is not to be limited except by the following claims. For example, the present invention is not limited to holding open pressure regulators, but may also be used to hold open (or closed) any valve.