A load sensor with split I-shaped elastic element
A technology of load sensor and elastic element, which is applied to the measurement of the force of the piezoelectric device, the instrument, and the measurement of fluid pressure. It can solve problems such as instability, buckling, and difficult to design overload insurance functions, and achieve zero drift of the sensor. , Easy to assemble and improve the effect of convenience
Active Publication Date: 2018-07-27
XI AN JIAOTONG UNIV +1
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Problems solved by technology
[0002] The beam pumping unit is currently the most widely used oil production equipment in oil production. In order to be able to grasp the working status of the pumping unit system, it is necessary to measure the load of the polished rod in real time. The polished rod load sensors currently used are mostly cylindrical Based on the compressive deformation of the elastic element, the load state is obtained by measuring the compressive strain of the cylindrical elastic element, and the simple cylindrical elastic element may cause instability, buckling and other damage during the compressive deformation, and it is difficult to determine the Component based design overload insurance function
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[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] Such as figure 1 and figure 2 As shown, the present invention contains a split-type I-shaped elastic element of the load sensor, the structure has an axisymmetric geometry, including a base 1, the first I-shaped cross-section elastic measuring element 2-1 and the first I-shaped section inserted on both sides of the base 1 Two I-shaped section elastic measuring elements 2-2; the first I-shaped section elastic measuring element 2-1 includes a lower side flange 3, an upper side flange 5 and a web 4 connecting the lower side flange 3 and the upper side flange 5; Both sides of the lower part of the lower flange 3 are processed with supporting bosses 6 in contact with the base 1 and safety bosses 7 floating above the base 1, and the upper flange 5 is processed with a load-bearing boss 8 along the transverse middle; There are sever...
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A load sensor containing a split-type I-shaped elastic element, including a base, and an I-shaped section elastic measuring element inserted on both sides of the base. The I-shaped section elastic measuring element consists of a lower flange, a web, an upper flange, and a lower flange. The supporting bosses and insurance bosses processed on the upper flange are composed of the load-bearing bosses processed on the upper flange; multiple sets of strain gauges arranged at ±45° are pasted on both sides of the web, and the I-shaped elastic elements are cut Measure the positive strain of tension and pressure under shear action, and connect it in series to the full bridge circuit for accumulation, which has high sensitivity and has the function of temperature compensation; the invention has the function of overload insurance, and the height of the insurance boss can be designed according to the needs of use, and the limit of the sensor can be limited. Safe working area, and the sensor adopts two independent I-shaped cross-section elastic measuring elements, which is convenient for pasting and measuring strain gauges, and realizes quick assembly and maintenance; the load sensor of the present invention is an open design, suitable for work in various environments, and convenient Installation and disassembly at the work site.
Description
technical field [0001] The invention relates to a sensor for detecting the load of a polished rod of a beam pumping unit in an oil field, in particular to a load sensor containing a split type I-shaped elastic element. Background technique [0002] The beam pumping unit is currently the most widely used oil extraction equipment in oil extraction. In order to be able to grasp the working status of the pumping unit system, it is necessary to measure the load of the polished rod in real time. The polished rod load sensors currently used are mostly cylindrical Based on the compressive deformation of the elastic element, the load state can be obtained by measuring the compressive strain of the cylindrical elastic element, and the simple cylindrical elastic element may cause instability, buckling and other damage during the compressive deformation, and it is difficult The overload insurance function is designed on the basis of components. Therefore, there is an urgent need for a ...
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IPC IPC(8): G01L1/00G01L1/16G01L19/06G01L19/04
CPCG01L1/00G01L1/16G01L19/04G01L19/0618
Inventor 徐明龙宋思扬俞凌庄贵林
Owner XI AN JIAOTONG UNIV