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Pressure transmitter with rectangular stress groove

A technology of stress tank and transmitter, which is applied in the direction of measuring fluid pressure, instruments, measuring force, etc., can solve the problem of failure to effectively solve the pre-tightening stress, welding stress accuracy deviation measurement accuracy, pre-tightening stress, welding stress accuracy deviation And the impact of elastic aftereffect accuracy, low measurement accuracy and other problems, to achieve the effect of strengthening the anti-deformation ability and stability, good stability, and high measurement accuracy

Inactive Publication Date: 2012-08-29
FIRSTRATE SENSOR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existence of preload stress, welding stress, accuracy deviation and elastic aftereffect will have a very adverse effect on the accuracy of the entire measurement
At present, the silicon strain gauge sensor is a kind of pressure transmitter that is widely used, but it cannot effectively solve the errors caused by the pre-tightening stress, welding stress, precision deviation and elastic aftereffect on the measurement accuracy, and the measurement accuracy is still low. lower, less stable

Method used

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  • Pressure transmitter with rectangular stress groove

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Embodiment Construction

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0015] refer to figure 1 , this embodiment includes an elastic element 1, a measuring circuit and a process connector, the measuring circuit is arranged on a circuit board 6, the process connector includes a metal outer tube 3, a Hessmann connector 4 and a four-core cable 5, the metal outer One side of the tube 3 is connected to the elastic element 1, the other side is connected to one side of the Hessmann connector 4, the other side of the Hessmann connector 4 is connected to the four-core cable 5, and the circuit board 6 is arranged in the metal outer tube 3 , the inside of the elastic element 1 is connected with the damper 9, and a layer of fluorine rubber sealing ring 2 is pasted on the elastic element 1. II7-2, Rectangular Stress Groove III7-3, Rectangular Stress Groove I7-1, Rectangular Stress Groove II7-2 are set on the part of elastic...

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Abstract

The invention relates to a pressure transmitter with a rectangular stress groove, which comprises an elastic element, a measuring circuit and a process connector, the measuring circuit is arranged on a circuit board, the process connector consists of a metal outer tube, a Hirschmann connector and a four-core cable, one end of the metal outer tube is connected with the elastic element, the other end of the metal outer tube is connected with one end of the Hirschmann connector, the other end of the Hirschmann connector is connected with the four-core cable, the circuit board is arranged in the metal outer tube, the interior of the elastic element is connected with a damper, a layer of fluororubber seal ring is attached on the elastic element, the elastic element is a cylindrical elastic element, and the stress groove with at least three rectangular sections is arranged on the circumference of the elastic element. The invention has the advantages of simple structure, low fabrication cost, high measuring precision and high stability.

Description

technical field [0001] The invention relates to a pressure transmitter, in particular to a pressure transmitter with a rectangular stress groove. Background technique [0002] The pressure transmitter consists of three parts: elastic element, measuring circuit and process connection. After the elastic element and the element under test are connected by threads, it is necessary to apply a preload of appropriate size to fasten the two. Every time a preload is applied, a certain internal stress will be generated on the elastic element, which is called preload stress; At the same time, since the elastic element and the process connection are connected by welding, the welding stress and the pre-tightening stress will affect the strain zone at the same time. Due to the influence of the stress, the zero point measured in the strain zone does not coincide with the zero point measured after unloading , that is, the zero point drift of the pressure transmitter causes the linear trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L19/08G01L1/00
Inventor 曾广胜陈旭财严伟
Owner FIRSTRATE SENSOR
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