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Underwater pressure-resistant structure self-adaptive constant-force fastening device and fastening method

A pressure-resistant structure and fastening device technology, applied in transportation and packaging, ship parts, ships, etc., can solve the problems of non-constant fastening force of elastic elements, difficult implementation, low installation efficiency, etc., to achieve convenient operation and structural Compact, efficient effect

Active Publication Date: 2019-12-20
CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are obvious deficiencies in the above method: 1) the fastening force of the elastic element is not constant, according to Hooke's law, the fastening force decreases linearly with the increase of the shrinkage deformation of the pressure-resistant structural member; It needs to be pre-tightened by tooling, and the pre-tightening tooling needs to be removed after installation, which is difficult to implement and the installation efficiency is low

Method used

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  • Underwater pressure-resistant structure self-adaptive constant-force fastening device and fastening method
  • Underwater pressure-resistant structure self-adaptive constant-force fastening device and fastening method
  • Underwater pressure-resistant structure self-adaptive constant-force fastening device and fastening method

Examples

Experimental program
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Effect test

Embodiment

[0086] Example: Verification of Constant Fastening Force of Fastening Devices

[0087] In this embodiment, the fastening force of the pressure-resistant structural member 7 is designed at 1t, and the remaining dimensions are designed as shown in Table 1 below:

[0088]

[0089] Table 1 Size Design Parameters

[0090] According to formula (1), get the numerical solution of the center line function and the first order derivative of strip hole 21 on the lever 2, as shown in table 2 below:

[0091]

[0092] The center line function of table 2 strip hole 21 and the numerical solution of first order derivative

[0093] According to formulas (2) and (3), the numerical solutions of the forces F1, F2, F3, and F4 on the lever 2 are obtained, as shown in Table 3 below:

[0094]

[0095]

[0096] Table 3 Numerical solutions of the forces F1, F2, F3, and F4 on lever 2

[0097] According to formula (4), the numerical solution of the pretightening force F4 of the spring 5 and ...

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Abstract

The invention relates to an underwater pressure-resistant structure self-adaptive constant-force fastening device and a fastening method. The underwater pressure-resistant structure self-adaptive constant-force fastening device comprises an I-shaped frame; levers are symmetrically arranged on the two sides of the I-shaped frame; one end of each of the two levers is converged to the outer part of an upper arm; supports are rotatably arranged on the end heads of the two levers; sliding blocks are arranged at the other ends of the two levers; the two sliding blocks are arranged on lower arms on the two sides of the upright columns symmetrically in a sliding way; single lever is connected with the end part of the upper arm through a strip-shaped hole; a spring and a fastening mechanism are arranged at the two ends of each lower arm; the spring is arranged between the sliding blocks and the fastening mechanism in a compressed way; during use, the top of the support is contacted with a pressure-resistant structure piece, the lower arms of the I-shaped frame and a non-pressure-resistant structure piece are fixedly arranged; and when the pressure-resistant structure piece is radially shrunk by an external force and the spring pushes the sliding blocks to slide, so that the levers push the support to move towards the pressure-resistant structure piece, and effective connection between the pressure-resistant structure piece and the non-pressure-resistant structure piece is guaranteed. The underwater pressure-resistant structure self-adaptive constant-force fastening device realizes aconstant and controllable fastening force of the pressure-resistant structure piece to effective resist external load, and is convenient to operate and reliable to use.

Description

technical field [0001] The invention relates to the technical field of underwater pressure resistance, in particular to an adaptive constant force fastening device and fastening method for an underwater pressure resistant structure. Background technique [0002] Underwater structural parts usually have the problem of deformation coordination. Due to the effect of hydrostatic external pressure, the circular cross-section pressure-resistant structural parts will produce radial shrinkage deformation, while the non-pressure-resistant frame structure installed opposite to it will not produce deformation; If the pressure-resistant structural member and the non-pressure-resistant frame structure are directly and rigidly connected together, the problem of uncoordinated deformation of the two will inevitably arise. The deformation coordination problem is particularly prominent in the deep sea environment, and has a very adverse impact on the overall safety of the structure. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B3/13B63B9/06
CPCB63B3/13
Inventor 徐强张博文刘见德赵青陈薇侯春明
Owner CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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