Multifunctional digital display dynamometer

Abstract

The invention relates to a multifunctional digital display force measuring instrument, which comprises a reverse force holding frame. The multifunctional digital display force measuring instrument is characterized in that: a force applying mechanism with a pull rod is arranged on the reverse force holding frame, the pull rod arranged above the reverse force holding frame is sleeved with a cylinder bushing type pressure sensor and a digital display instrument connected with the cylinder bushing type pressure sensor. The multifunctional digital display force measuring instrument is mainly used for force value inspection in architectural engineering.

Description

technical field [0001] The invention relates to an instrument for detecting force values ​​in construction engineering, in particular to a multifunctional digital display force measuring instrument. Background technique [0002] At present, there are facing brick bond strength testers, carbon fiber bond strength testers, concrete strength testers, anchorage force testers, etc. produced by some manufacturers on the market. These instruments all use hydraulic transmission technology. The basic principle of hydraulic transmission is: the hydraulic cylinder and the one-way valve complete oil suction and oil discharge, and convert the mechanical energy of the lever into the pressure energy of the oil for output. The large hydraulic cylinder converts the pressure energy of the oil into mechanical energy output, and lifts heavy objects. The large and small hydraulic cylinders form the simplest hydraulic transmission system, which realizes the transmission of force and motion. [0...

AI Technical Summary

Problems solved by technology

[0010] 1. During the transmission process, the energy needs to be converted twice, and the transmission efficiency is low

[0011] 2. Due to the influence of factors such as the compressibility and leakage of the transmission medium, as well as the deformation of the cylinder body and the pipeline, the stability and correctness of the movement are affected, so that the hydraulic transmission cannot guarantee a strict transmission ratio, which is manifested as poor stability of the indication value

[0012] 3. Since the piston and the cylinder cannot be completely seamless, the hydraulic oil cannot completely seep back. When the piston does not work, the pressure is not easy to maintain constant

[0013] 4. Hydraulic transmission is sensitive to changes in oil temperature. When the temperature changes, the viscosity of the liquid changes, causing changes in motion characteristics and affecting the stability of the work. Therefore, it is not suitable to work under environmental conditions with large temperature changes.

[0014] 5. It is not easy to check and eliminate the failure of the system during the working process

[0015] 6. In order to reduce leakage and meet certain performance requirements, the manufacturing precision of hydraulic components is required to be high, and the processing technology is more complicated

[0016] 7. Hydraulic transmission requires a separate energy source

[0028] (3) During the short-term (≤5min) load-holding period of the loading system of the equipment, the load-down value shall not be greater than 5%

[0029] The hydraulic jack is loaded because the piston and the cylinder cannot be completely seamless, and the hydraulic oil cannot completely leak back. When the piston does not work, the pressure is not easy to keep constant

Therefore, it cannot be guaranteed that "the load reduction value of the loading system shall not be greater than 5% during the short-term (≤5min) load holding period."

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