Oil pumping unit polish rod force measuring device

Abstract

Disclosed is an oil pumping unit polish rod force measuring device. A retaining block is mounted on a load-bearing body with a U-shaped notch and matched with the U-shaped notch to form a mounting hole, a circuit board, a battery and a wireless transmitter are arranged in a shell connected on the load-bearing body, strain gauges are attached on three strain columns mounted on the load-bearing body, the strain gauges, the battery and the wireless transmitter are connected with the circuit board, the strain columns are penetratingly arranged in the load-bearing body and arranged around the mounting hole, and an upper load-bearing plate and a lower load-bearing plate are connected at the upper end and the lower end of the load-bearing body respectively and abutted against the upper ends and the lower ends of the strain columns respectively. During use, the upper load-bearing plate and the lower load-bearing plate serve as direct stressed ends; when the upper load-bearing plate and the lower load-bearing plate bear external force, the upper end and the lower end of each strain column form a supporting face, so that stressed uniformity can be ensured, and unbalanced loading can be prevented. In addition, the strain gauges on the strain columns form group-bridge parallel connection, so that testing accuracy can be improved, and overloading-preventive capability can be enhanced.

Description

technical field [0001] The invention relates to a force measuring device, in particular to a force measuring device for a polished rod of a pumping unit. Background technique [0002] In order to ensure the normal and safe operation of the pumping unit, it is necessary to measure the force of the polished rod during work. The basic structure of an existing polished rod force measuring device for a pumping unit is as follows: a "U"-shaped notch is opened on the carrier, and a stopper is installed on the carrier, and the stopper cooperates with the "U"-shaped notch to form a mounting hole. A strain column is installed on the body, and a housing is connected to the bearing body. A circuit board, a battery and a wireless transmitter are arranged in the housing. A strain gauge is attached to the strain column, and the strain gauge, the battery and the wireless transmitter are connected to the circuit board. The number of strain columns used in this force measuring device is 1-2....

AI Technical Summary

Problems solved by technology

The number of strain columns used in this force measuring device is 1-2. The shortcomings are: the strain column is directly stressed during use, and it is easy to be unbalanced when the force is applied, which will affect the test accuracy if it is light, and the force measuring device will be affected if it is heavy. damage

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