Elastic element of pressure transmitter
A technology of elastic components and transmitters, applied in the direction of measuring fluid pressure, measuring fluid pressure through electromagnetic components, instruments, etc., can solve problems such as damaged diaphragms and strain gauges, test result errors, and scrapped pressure transmitters, etc., to achieve Low cost, long service life and simple structure
Inactive Publication Date: 2010-12-29
陈旭财
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Problems solved by technology
The elastic sensitive element of the traditional strain gauge pressure transmitter is a circular metal flat diaphragm fixed around the periphery, which is fixed on the pressure conduit by welding. The flat diaphragm is perpendicular to the pipe wall, and the structural strain at the connection is very large, which is a typical stress. Concentration point, when the pressure is loaded on the flat diaphragm, stress concentration will occur on the circumference of the flat diaphragm, which will cause large errors in the test results. When the stress concentration phenomenon is serious, the diaphragm and strain gauge may be damaged, causing pressure transmission completely scrapped
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[0013] The present invention will be further described below in conjunction with accompanying drawing.
[0014] refer to figure 1 , 2 , this embodiment includes an elastic element body 9, a diaphragm 1 is provided in the strain area of the elastic element body 9, and the diaphragm 1 is a plane 4 on one side, and a concave groove with an arc-shaped chamfer 3 on the other side. On plane 2, the fluid conduit 8 on the pressure transmitter is set on one side of the concave plane 2, the ratio of the radius of the fluid conduit 8 to the radius of the arc-shaped chamfer 3 is 1:7.5, and there are two on the plane side of the diaphragm 1 Silicon strain gauge11.
[0015] The silicon strain gauge 11 is connected to the circuit board 6 of the pressure transmitter through the binding wire 7 , and the outlet of the fluid conduit 8 arranged on the concave side of the diaphragm 1 is connected to the damper 10 of the pressure transmitter.
[0016] The arc-shaped chamfer 3 on the diaphrag...
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The invention discloses an elastic element of a pressure transmitter, which comprises an elastic element main body, wherein a diagraph is arranged in an elastic element main body strain area; one side of the diagraph is a plane, while the other side is a concave plane with a circular arc-shaped chamfer; a fluid conduit on the pressure transmitter is arranged on the concave plane side, and at least one silicon strain plate is arranged on the plane side of the diagraph. The elastic element of the pressure transmitter has a simple structure, low cost and a long service life and is favorable for improving the sensitivity, linear stability degree and measurement precision of the pressure transmitter.
Description
technical field [0001] The invention relates to an elastic element of a pressure transmitter. Background technique [0002] Pressure transmitter is a kind of transmitter commonly used in industrial practice, and is widely used in various industrial automatic control environments. Due to the small size of the silicon strain gauge, the intelligent pressure transmitter has a variety of specifications to choose from, and can flexibly design the form of the elastic sensitive element to adapt to various applications and is more widely used. The elastic sensitive element of the traditional strain gauge pressure transmitter is a circular metal flat diaphragm fixed around the periphery, which is fixed on the pressure conduit by welding. The flat diaphragm is perpendicular to the pipe wall, and the structural strain at the connection is very large, which is a typical stress. Concentration point, when the pressure is loaded on the flat diaphragm, stress concentration will occur on the...
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IPC IPC(8): G01L9/00
Inventor 曾广胜陈旭财严伟
Owner 陈旭财