Low-disturbance sealing device for sediment sampler

A technology of sealing device and sampler, which is applied in the direction of sampling device, etc., can solve the problems of sample loss, sampling failure, sediment disturbance, etc., and achieve the effect of simple operation, light weight and small volume

CN101762403BInactive Publication Date: 2011-08-10HANGZHOU DIANZI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2011-08-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a low-disturbance sealing device for a sediment sampler. The sealing effect is poor and the loss of sample is severe in the prior art. The low-disturbance sealing device of the invention comprises a piston sealing mechanism and a gas sealing mechanism, wherein the piston sealing mechanism is arranged at the upper part of the gas sealing mechanism; the two ends of a sampling tube in the piston sealing mechanism are open; a piston is moveably arranged in the sampling tube; a sealing mechanism and a supporting flange are arranged at the top and the bottom of the piston respectively; a cutting tool bit and a lower support in the gas sealing mechanism are co-axially arranged; a sealing cavity is located between the cutting tool bit and the lower support; a gastight leather bag is clung to the inner wall of the sealing cavity; a ring-shaped gas-guiding groove is formed between the outer wall and the inner wall of the sealing cavity; an outer gas guiding hole is formed on the outer wall of the sealing cavity; one end of the outer gas guiding pipe is connected with the outer gas guiding hole; and a plurality of inner gas guiding holes are evenly formed on the circumference of the gas guiding groove on the inner wall of the sealing cavity. The low-disturbance sealing device of the invention has the advantages of small size, light weight and simple operation andis capable of sampling sediment and overlying water in shallow water.
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Description

technical field

[0001] The invention belongs to the technical field of underwater sediment and overlying water sampling, and in particular relates to a low-disturbance sealing device for a sediment sampler. Background technique

[0002] In the low-disturbance sediment sampling process in shallow waters, one of the key technologies is to implement low-disturbance effective sealing of the sampling device. If the nozzle at the upper end of the sampling cylinder cannot be effectively sealed, it will cause the sediment to slip out of the sampling cylinder during the process of pulling out water on the sampler, causing the sample to be lost, and also affecting the hierarchical structure of the sample, resulting in sampling failure. If the bottom of the sampling cylinder is not sealed tightly, due to the weight of the sediment, the sampler will also lose the sample during the lifting process, which will also affect the hierarchical structure of the sample and cause sampling failure...

Examples

Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing.

[0017] Such as figure 1 As shown, a low-disturbance sealing device for a sediment sampler includes two parts: a piston sealing mechanism and an air sealing mechanism:

[0018] 1) Piston sealing mechanism: including piston rod 1, bolt 2, upper support flange 3, sealing ring 4, piston 5, sealing ring 6, lower support flange 7 and sampling cylinder 8. The piston mechanism forms the upper port seal of the sampling cylinder 8, the two ends of the sampling cylinder 8 are open, the piston 5 is movable in the sampling cylinder, the top of the piston is sequentially provided with the sealing retaining ring 4 and the upper supporting flange 2, and the upper supporting flange 2. The sealing retaining ring 4 and the piston 5 are fixedly connected by bolts 2, and one end of the piston rod 1 is fixedly connected with the upper supporting flange 3 by threads; the bottom of the piston 5 i...