Tractional load sampling device

A sampling device and mass-moving technology, applied in the direction of sampling devices, etc., can solve problems such as loss of mass-transported samples, damage, and impact on sand transportation conditions, and achieve good flexibility, good representativeness, and good practicability

Active Publication Date: 2013-06-12
CHINA INST OF WATER RESOURCES & HYDROPOWER RES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similar to the pit measurement method, the mother-child box-type moving mass sampler has less disturbance to the natural flow field of the river during the sampling process, and can obtain higher sampling accuracy, but it also has the following disadvantages: (1) Dig a hole to bury the mother box It is difficult to ensure that the height of the top of the box is consistent with the height of the natural riverbed; (2) The excavation process of the mother box has caused a certain degree of damage to the natural surface of the upstream riverbed of the sampling section, which affects the sand delivery conditions; (3) The child box The gap between the mother box will lose a certain amount of mass sample, thereby reducing the sample recovery rate

Method used

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Examples

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Embodiment 1

[0040] The structure of the caisson described in Embodiment 1 of the present invention is as follows figure 1 figure 2 , including a front baffle 1, two side baffles 2, a rear baffle 11, and a box cover 20 made of high-strength stainless steel plates. A caisson top frame 3 is arranged on the top of the front baffle 1 and the side baffle 2 . The tailgate 11 has a tailgate top frame 12, and the box cover 20 is as Figure 5 As shown, its specification is consistent with the specification of the outer boundary of the caisson top frame 3 and has a lifting beam 18. The width of the caisson top frame 3 is 4 cm and has a connection hole 4 . The floating display object connecting rope 5 adopts fishing line to make, and the floating display object 6 is a rigid foam material. The inner boundary of the opening of the caisson is 54×33cm, and the height of the caisson is 28cm.

[0041] The structure of the sampling box is as image 3 Shown, be the rectangular box body that has sampli...

Embodiment 2

[0044] The caisson of this embodiment is as Figure 7 , 8 The structure shown has a supporting beam, which makes the structure of the caisson stronger and more suitable for taking drift samples in soft sandy riverbeds. The supporting bottom beam 23 and the supporting top beam 22 are made of a stainless steel triangular profile with a side length of 4 cm. The supporting bottom beam 23 is fixedly connected to the rear end bottoms of the two side baffles 2; the two ends of the supporting top beam 22 are provided with connecting holes 4, which are connected with the connecting holes provided at the two ends of the rear side of the caisson top frame 3. 4. Use connecting parts (such as bolts) for detachable connection. The tailgate 21 is as Figure 6 A handle 18 is shown. The specification of described caisson, sampling box is the same as embodiment 1, and the inner boundary of described caisson box mouth is 54 * 33cm, and height is 28cm; The outer boundary of described sampling...

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Abstract

The invention provides a tractional load sampling device comprising a sinking caisson and a sampling box, wherein the rear side of the sinking caisson is of a detachable structure; the sinking caisson is used for excavating a sampling box pit; and the sampling box is arranged in the sampling box pit dug by utilizing the sinking caisson to collect a tractional load sample. Due to the adoption of the structure of the tractional load sampling device, the box pit can be easily dug, the digging depth of the box pit is easy to control, and little damage to the surface of a river bed at the periphery of the box pit is caused when the box pit is dug; the tractional load sampling device has good flexibility and practicability and high sampling rate; and the collected tractional load samples have good representativeness.

Description

technical field [0001] The invention relates to a displacement mass sampling device, in particular to a displacement mass sampling device suitable for the natural state of sandy, gravel, pebble and mixed river beds with a water depth less than 50 cm. Background technique [0002] The drift material is the sediment particles that move along the river bed surface by rolling, jumping or sliding with the water flow, and the diameter of the particles ranges from fine sand of 0.1 mm to pebbles of tens of centimeters. The mass or volume of the transported material passing through a certain cross-section of the river per unit time is the transported sediment transport rate, and the particle size composition of the transported material is the gradation of the transported material. [0003] The movement of drift mass is one of the important forms of sediment transport in rivers. The flow energy of rivers in different reaches and seasons is different, and the movement form, sediment tr...

Claims

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Application Information

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IPC IPC(8): G01N1/20
Inventor 王兆印何晓燕王旭昭余国安任明磊姜晓明
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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