Tip flow barrier for a pitot tube type of fluid flowmeter
First Claim
1. In combination with a pitot tube differential pressure fluid flow sensor disposed diametrically inside a fluid conducting conduit having a wall and a means for blocking fluid flow between a distal tip of the sensor and an adjacent portion of the wall of the conduit, the combination comprising:
- a resilient barrier attached to the distal tip of the sensor and disposed between the tip of the sensor and the conduit wall, the barrier having a front profile perpendicular to a direction of fluid flow that prevents fluid flow between the tip of the sensor and the conduit wall.
2 Assignments
0 Petitions
Accused Products
Abstract
A device and method provide improved measurement of flow through an enclosed channel, such as a pipe. A flow measurement device, such as a differential pressure sensing pitot tube, includes a pressure sensing probe that is inserted into the pipe for measuring the rate of fluid flow therein. A compressible or elastic barrier is attached to the distal end of the sensing probe to fill the space between the tip end of the sensing probe and the nearby portion of the inside wall of the fluid carrying pipe. The resilient barrier prevents undesirable fluid flow between the tip end of the sensing probe and the inside wall of the pipe.
31 Citations
11 Claims
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1. In combination with a pitot tube differential pressure fluid flow sensor disposed diametrically inside a fluid conducting conduit having a wall and a means for blocking fluid flow between a distal tip of the sensor and an adjacent portion of the wall of the conduit, the combination comprising:
a resilient barrier attached to the distal tip of the sensor and disposed between the tip of the sensor and the conduit wall, the barrier having a front profile perpendicular to a direction of fluid flow that prevents fluid flow between the tip of the sensor and the conduit wall. - View Dependent Claims (2, 3, 4)
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5. An assembly for flow measurement in a pipe having an inner wall, comprising:
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a differential pressure sensing probe disposed diametrically within the pipe, the sensing probe having a tip adjacent a portion of the inner wall of the pipe; and spring means extending from the tip for blocking fluid flow between the tip of the sensing probe and the inner wall of the pipe. - View Dependent Claims (6, 7)
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8. A method for measuring the fluid flow rate through a pipe, comprising the steps of:
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mounting a differential pressure sensing probe having a tip within the pipe, wherein the tip of the probe is adjacent an inner wall of the pipe but spaced therefrom; and
,providing a barrier between the tip of the sensing probe and the inner wall of the pipe, wherein the barrier obstructs fluid flow between the tip of the sensing probe and the inner wall of the pipe. - View Dependent Claims (9, 10, 11)
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Specification