High pressure three way valve
A solenoid operated valve includes a fluid inlet and a fluid inlet, a common port, a normally open port and a normally closed port combined on an end cap. The valve further includes a coil housing that houses two coils, a first coil and second coil, that are in parallel with each other creating two parallel longitudinal axes for a normally open assembly and a normally closed assembly. The normally open assembly includes a first diaphragm assembly, a plunger rod having barbed ribs on a proximal end thereof, a magnetic pin and a body that is coupled to a distal end of the plunger rod. The normally closed assembly includes a second diaphragm assembly, a plunger and a magnetic post. The first and second coils are simultaneously actuated.
1. A three-way valve, comprising:
a coil housing having a proximal end, a distal end, two separate parallel chambers, the two parallel chambers being adapted to hold a first coil defining a normally open side and a second coil defining a normally closed side, the normally open side defining a first longitudinal axis and including a first diaphragm assembly adapted to be coupled to a plunger rod, the normally closed side defining a second longitudinal axis and including a second diaphragm assembly adapted to be coupled to a magnetic plunger;
an end cap having a side that presses against the coil housing during assembly so as to form a fluid tight seal, the end cap defining a first sealing apex and second sealing apex; and
at least one barbed rib disposed at the proximal end of the plunger rod and moveable with the plunger rod to engage the first diaphragm assembly and to move the first diaphragm assembly into sealing engagement with the first sealing apex of the end cap,
wherein the plunger rod connects the first diaphragm assembly with a first spring, the first spring having properties for maintaining the barbed rib off of the first diaphragm assembly when the first coil is de-energized, and for lifting the barbed rib onto the first diaphragm assembly when the first coil is energized.
2. The three-way valve of claim 1 , further comprising:
a first bobbin disposed about the first longitudinal axis and defining a first inner hollow section, the first bobbin configured to fit within the coil housing, the first coil being wrapped around the first bobbin; and
a second bobbin disposed about the second longitudinal axis, the second bobbin defining a second inner hollow section and laying parallel to the first bobbin within the coil housing, the second coil being wrapped around the second bobbin.
3. The three-way valve of claim 1 , wherein during actuation, the first and second coils are energized simultaneously, to create a magnetic field that forces the plunger rod to traverse axially and move toward the first diaphragm assembly and that simultaneously forces the plunger to transverse axially and move away from the second diaphragm assembly.
4. The three-way valve of claim 1 , wherein the normally closed side further comprises a plunger that is adapted to be coupled to the second diaphragm assembly and a second spring that holds the second diaphragm against the sealing apex on the end cap when the second coil is de-actuated, the second spring being configured to fit within the second bobbin between a proximal end thereof and a stationary magnetic post.
5. The three-way valve of claim 1 , wherein when the second coil is actuated the plunger becomes magnetically attracted to a stationary magnetic post causing the plunger to traverse axially away from the second diaphragm assembly and towards the distal end of the housing, thereby opening the normally closed side.
6. The three-way valve of claim 1 , wherein the plunger rod is coupled to the body, so as to allow for an adjustable pressure rating.
7. The three-way valve of claim 1 , further comprising first and second rear magnetic discs disposed around the respective parallel chambers, the first and second rear magnetic discs having properties for shaping the magnetic flux field when the coils are actuated.
8. The three-way valve of claim 1 , wherein the end cap further includes channels defining a fluid inlet and a fluid outlet.
9. The three-way valve of claim 1 , further comprising a first front magnetic disc on the normally open side adapted to fit over the magnetic post and a second front magnetic disc on the normally closed side adapted to fit over the plunger.
10. The three-way valve of claim 1 , wherein the normally open side further comprises a body within the first hollow section of the first bobbin, the body being transversely adjacent to a stationary magnetic pin and threadably coupled to the plunger rod at a distal end thereof.
11. The three-way valve of claim 10 , wherein upon actuation of the first coil, the body is attracted to the stationary magnetic pin causing the plunger rod to move transversely through the magnetic pin, the proximal end of the plunger rod being adapted to connect with the first diaphragm assembly, so as to close the normally open side.
12. A three way valve, comprising:
a fluid inlet and a fluid outlet;
a coil housing having a proximal end and a distal end, the housing defining a first longitudinal axis on a normally open side of the valve and a second longitudinal axis on a normally closed side of the valve, the first and second longitudinal axes lying parallel to each other;
a first solenoid coil wrapped around a first bobbin on the first longitudinal axis, the first bobbin defining a first inner hollow section;
a second solenoid coil wrapped around a second bobbin on the second longitudinal axis, the second bobbin defining a second inner hollow section;
the first and second solenoid coils being configured to fit inside of the coil housing, the solenoid coils having properties for generating a magnetic field when actuated;
a magnetic plunger rod on the normally open side, configured to traverse axially along the first longitudinal axis,
wherein upon actuation of the first solenoid coil, the plunger rod travels toward the proximal end of the housing, becoming engaged with a first diaphragm assembly;
a plunger on the normally closed side configured to traverse axially along the second longitudinal axis,
wherein upon actuation of the second solenoid coil, the plunger travels toward the distal end of the housing, becoming disengaged with a second diaphragm assembly; and
wherein the magnetic plunger rod and the plunger move simultaneously with each other when the magnetic field is generated,
wherein the first diaphragm assembly receives a first sleeve that engages a first spring, the first sleeve being disposed between a diaphragm keeper and a plunger barb, the first spring lifting the plunger barb onto the first diaphragm assembly when the first coil is actuated.
13. The three-way valve of claim 12 , further comprising a stationary magnetic post on the normally closed side of the valve that attracts the plunger towards the distal end of the housing during coil actuation, so as to disengage the plunger from the second diaphragm assembly.
14. The three-way valve of claim 12 , further comprising: a second sleeve biased toward the second diaphragm assembly by a second spring, and being removable from the second diaphragm assembly against the bias of the second spring when the second coil is actuated.