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US 12,455,582 B2Granted
Methods and systems for monitoring stress in a tendon in concrete post-tensioning
OwnerFelix Sorkininventor
Life of this patent
Estimating the term…
Abstract
The present disclosure pertains to a process for monitoring stress applied to a tendon by a hydraulic jack during tensioning of concrete. The process may include measuring an amount of hydraulic fluid that flows through the hydraulic jack during tensioning. The measured amount of hydraulic fluid is correlated with an amount of stress applied per unit of hydraulic fluid to determine a total amount of stress employed on the tendon. The process may also include measuring the distance of travel of the hydraulic piston. The measured travel can be used to calculated the distance the tendon has been pulled (elongation) as well as the stress applied to the tendon.
Claims29
A system for monitoring and controlling stress during tensioning tendons for concrete post-tensioning operations, comprising:
- a hydraulic pump unit comprising:
- a pump;
- a hydraulic valve block, fluidly connected to the pump, comprising one or more ports, and a first sensor;
- a display screen, mounted on the hydraulic pump unit, comprising a user interface configured for entry of one or more operating parameters for the hydraulic pump unit and configured to provide a display of the one or more operating parameters and output from the first sensor, comprising at least an amount of hydraulic fluid ported by the pump;
- and
- one or more processors configured to perform calculations based on at least output from the first sensor and configured to provide an output of the calculations to the display screen;
- and
- a post-tensioning jack fluidly coupled to the one or more ports of the hydraulic valve block such that the post-tensioning jack is configured to be operated by the hydraulic pump unit by hydraulic fluid ported through the hydraulic valve block and is configured for tensioning tendons for concrete post-tensioning;
- and
- wherein the hydraulic pump unit is configured with an automatic shut-off capability, the automatic shut-off capability being triggered by a measurement, of the first sensor, of a predetermined amount of hydraulic fluid ported by the pump to the post-tensioning jack, and wherein further the hydraulic pump unit is also configured with an automatic start capability, the automatic start capability being triggered by a reset of one of the pump or the post-tensioning jack.
7 more elements
A device for monitoring and controlling stress during tensioning tendons for concrete post-tensioning operations, comprising:
- a hydraulic pump unit comprising:
- a pump;
- a hydraulic valve block, fluidly connected to the pump, comprising one or more ports and a sensor;
- and
- a display screen, mounted on the hydraulic pump unit, comprising a user interface configured for entry of one or more operating parameters for the hydraulic pump unit and configured for a display of the one or more operating parameters and an output of the sensor, comprising at least an amount of fluid ported by the pump;
- one or more processors configured to perform calculations based on at least output from the sensor and configured to provide an output of the calculations to the display screen;
- and
- wherein the hydraulic pump unit is configured to have a post-tensioning jack fluidly coupled to the one or more ports of the hydraulic valve block such that the post-tensioning jack is operated by the hydraulic pump unit by hydraulic fluid ported through the hydraulic valve block and is configured for applying tension to a tendon for concrete post-tensioning and wherein further the hydraulic pump unit is configured with an automatic shut-off capability, the automatic shut-off capability being triggered by a measurement of the sensor of a predetermined amount of hydraulic fluid ported by the pump to the post-tensioning jack, and wherein further the hydraulic pump unit is also configured with an automatic start capability, the automatic start capability being triggered by a reset of one of the pump or the post-tensioning jack.
5 more elements
A system for monitoring and controlling stress during tensioning tendons for concrete post-tensioning operations, comprising:
- a hydraulic pump unit comprising:
- a pump;
- a hydraulic valve block, fluidly connected to the pump, comprising one or more ports and a first sensor;
- a solenoid for controlling the hydraulic valve block
- a display screen, mounted on the hydraulic pump unit, wherein the display screen is movable between a raised and lowered position and comprising:
- a user interface configured for entry of one or more operating parameters for the hydraulic pump unit and configured to provide a display of the one or more operating parameters and output from the first sensor, comprising at least an amount of hydraulic fluid ported by the pump, and wherein the display screen is movable between a raised and lowered position;
- one or more processors configured to perform calculations based on at least output from the first sensor and configured to provide an output of the calculations to the display screen;
- and
- a wireless connection to enable remote control and monitoring of operation of the hydraulic pump unit;
- and
- a post-tensioning jack fluidly coupled to the one or more ports of the hydraulic valve block, such that the post-tensioning jack is operated by the hydraulic pump unit by hydraulic fluid ported through the hydraulic valve block and is configured for tensioning tendons for concrete post-tensioning, and being comprising a second sensor configured to measure of a linear movement of a piston of the post-tensioning jack, the second sensor being communicatively coupled through the wireless connection to the hydraulic pump unit and the display screen is configured to display an output of the second sensor;
- and
- wherein the hydraulic pump unit is configured with an automatic shut-off capability and an automatic start capability,
- the automatic shut-off capability being triggered by a measurement, from the first sensor, of a predetermined amount of hydraulic fluid ported by the pump to the post-tensioning jack, and
- the automatic start capability being triggered trigged by a reset of one of the pump or the post-tensioning jack.
12 more elements
Dependencies are inferred from the claim text.