Internal geometry shape design for venturi tube-like gas-air mixing valve
First Claim
1. A gas-air mixing valve using a tube, comprising:
- a valve having a central axis and an internal geometry shape for directing the flow of air and gas, said valve having an air inlet, an inlet part from the inlet to a throttle, a gas inlet slot proximate said throttle, and an outlet;
said inlet part having a first body part and a replaceable molded part;
said first body part having inlet surface centered about said central axis of said valve and being defined with respect to said axis by a concave surface having a first circular cross section at said air inlet;
said replaceable molden part being a composition of a conical surface having a linear cross section and further having a convex surface, said convex surface having a second circular cross section forming the said throttle;
an replaceable outlet part having a composite outlet surface defined with respect to said axis by a first conical surface extending from said second circular cross section to a second convex surface at said outlet.
1 Assignment
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Accused Products
Abstract
A gas-air mixing valve using a tube. The valve has an internal geometry shape for directing the flow of air and gas, including an air inlet, an inlet part from the inlet to a throttle, a gas inlet slot proximate the throttle, and an outlet. The inlet part has a first body part, preferably of aluminum or other metal, and a replaceable molded part normally of plastic. The first body part has an inlet surface centered about a central axis defined by a concave surface having a first circular cross section. The replaceable molden part has a composite surface defined by conical surface defined by conical surface having a linear cross section and further defined by a convex surface having a second circular cross section forming the throttle. The replaceable molden outlet part has a conical surface extending from the second circular cross section to a second convex surface at the outlet. The throttle has a radius with respect to the central axis of the valve defined by the relationship between the desired air flow and radius for a particular pressure drop. The gas slot has a thickness with respect to the desired gas flow defined by the relationship between the desired gas flow and gas slot for a particular pressure drop. Both relationships are computer simulated using parameters of the system for which the valve is intended to be used.
31 Citations
14 Claims
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1. A gas-air mixing valve using a tube, comprising:
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a valve having a central axis and an internal geometry shape for directing the flow of air and gas, said valve having an air inlet, an inlet part from the inlet to a throttle, a gas inlet slot proximate said throttle, and an outlet; said inlet part having a first body part and a replaceable molded part; said first body part having inlet surface centered about said central axis of said valve and being defined with respect to said axis by a concave surface having a first circular cross section at said air inlet;
said replaceable molden part being a composition of a conical surface having a linear cross section and further having a convex surface, said convex surface having a second circular cross section forming the said throttle;an replaceable outlet part having a composite outlet surface defined with respect to said axis by a first conical surface extending from said second circular cross section to a second convex surface at said outlet. - View Dependent Claims (2, 3, 4, 5, 6)
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7. In a gas-air mixing valve using a tube in which air entering said valve via an air inlet draws gas from a gas inlet around the periphery of said entering air, an inlet device comprising:
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an inlet part with a shape profile in cross section defined by an inlet circular surface leading to a straight surface that terminates in a second inlet circular surface at a point proximate said gas inlet; and an outlet part having a shape profile in cross section comprising one conical surface extending from the second inlet circular surface of said inlet to a discharge end curved surface engaging said discharge end. - View Dependent Claims (8, 9, 10)
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11. A gas-air mixing valve using a tube and having a predetermined air and gas capacity, comprising:
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a throttle for adjustably controlling the quantity of gas introduced into said tube; a valve having internal geometry shape for directing the flow of air to said tube, said valve having an inlet part and an outlet part; said inlet part having a body part and a replaceable molded part;
said first body part having an inlet surface centered about a central axis of said body part and being defined with respect to said axis by a concave surface having a first circular cross section;
said replaceable molden part having a composite conical surface having a linear cross section and further defined with respect to said axis by a convex surface having a second circular cross section; andsaid replaceable molded outlet part having a composite outlet surface defined by a first conical surface extending from said second circular cross section to a second convex surface. - View Dependent Claims (12, 13, 14)
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Specification