Sand taking device underwater proportional triggering device

Abstract

The invention provides an underwater proportional triggering device for a sand taking device, which belongs to the technical field of an auxiliary device of the sand taking device. A bracket portion comprises a bracket II; a power portion comprises a rotatable pulley, a floating ball that can pass through a suspension rod and moves along the suspension rod, a traction rope connecting the floatingball and the outer wall of the pulley, a scroll spring mounting shaft that extends from a first end of the pulley into the pulley without rotation with the pulley, a scroll spring and a right angle reducer; a proportioned portion includes a shaft I, a gear A, a gear C, a shaft II, a pin fixing wheel, a gear D, a gear B, a compression spring and a pin shaft; and a triggering portion includes a mounting bracket, a four-bar mechanism rod II, a four-bar mechanism rod III, a four-bar mechanism rod IV, a first connecting member, a second connecting member, a torsion spring, a pressing rod and a drawstring. The device realizes mechanical automation, reduces the work intensity of the staff, and shortens the measurement time. The control accuracy is only related to the machining accuracy of the parts, which avoids the control accuracy being affected by the temperature drift and zero drift of the electronic components.

Description

technical field [0001] The invention relates to the technical field of an auxiliary device for a sand fetcher, in particular to an underwater fixed-proportion trigger device for a sand fetcher. Background technique [0002] The sand collector is an instrument for taking suspended sediment water samples, transported sediment and bed sand samples in the river to determine the sediment content, sand transport rate and sediment particle matching. The suspended sediment collector is used to collect rivers and lakes. Wait for the instantaneous suspended sediment water sample of the cross-section. The most commonly used type of suspended sand extractor is the instantaneous sampler. The axis of the water intake cylinder is parallel to the direction of water flow. There are covers at both ends, and springs are installed on the edge of the cover. The principle is to connect the main traction line with the The cylinder cover located on the upper part of the water intake cylinder is co...

AI Technical Summary

Problems solved by technology

During manual operation, the fixed water level is determined by the operator observing that the scale marked on the support rod is equal to the water surface. Since the human eye is far away from the scale and the fluidity of the river makes the water surface fluctuate greatly, it is difficult for the operator to accurately determine the water level. The water level of the water cylinder causes a large error between the actual water level of the water sample and the predetermined water level. In order to minimize the error, repeated operations are required, which increases the labor intensity of the staff and prolongs the measurement time; , the control accuracy of the water level of the water intake tube is easily affected by the temperature drift and zero drift of electronic devices

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