CN-224231131-U - Color change type stress sensor and overload indication safety chain formed by same

CN224231131UCN 224231131 UCN224231131 UCN 224231131UCN-224231131-U

Abstract

The utility model belongs to the technical field of chain stress sensing, and discloses a color change type stress sensor and an overload indication safety chain formed by the color change type stress sensor, wherein the color change type stress sensor comprises a transparent outer shell, a color change component is packaged in the transparent outer shell, the color change component comprises a color development material and a color development agent, the color development agent is sealed in a tube body in a fusion way, the tube body is formed by a fragile material, and the tube body is subjected to external dynamic stress with certain strength to be structurally broken so as to release the color development agent to enable the color development material to be contacted with the color development material; the scheme can reflect overload conditions of different positions of the chain plate in real time and visually through the color change type stress sensor, is favorable for workers to discover and replace or maintain locally in time, avoids the occurrence of breakage events of the chain after multiple times of overload, and improves the use safety and service life of the chain.

Inventors

BAO XIAOPING
YAO SHENGQIANG
SUN YIFAN
HUANG WENBIN
WU YONGZHONG
YAO YANFEN

Assignees

杭州持正科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250512

Claims (9)

1. A color change type stress sensor is characterized by comprising a transparent outer shell, wherein a color change component is packaged in the transparent outer shell, the color change component comprises a color development material and a color development agent, the color development agent is sealed in a tube body in a fusion mode, the tube body is made of a fragile material, and the tube body is subjected to external dynamic stress with certain strength to be structurally broken so as to release the color development agent to enable the color development agent to be in contact with the color development material.
2. The color change type stress sensor according to claim 1, wherein the tube body is longitudinally arranged in the transparent outer shell, and two ends of the tube body are abutted against the inner wall of the transparent outer shell.
3. The color change type stress sensor according to claim 2, wherein a buffer cushion is arranged at a position where the tube body is abutted against the inner wall of the transparent outer shell, the buffer cushion comprises a plurality of critical buffer thresholds, the buffer cushion with one critical buffer threshold and the tube body form a buffer tube body with a corresponding grade, when the external stress reaches the critical buffer threshold, the corresponding buffer cushion fails, and the buffer tube body is structurally broken to release the color developing agent.
4. The color change type stress sensor according to claim 1, wherein the tube body is a thin-walled glass tube.
5. The color change type stress sensor according to claim 1, wherein the color development principle of the color development material and the color development agent is any one of redox color development, humidity sensitive color development and acid-base color development.
6. The color change type stress sensor according to claim 1, wherein the transparent outer shell is in a strip shape or a dumbbell shape, and the size of the transparent outer shell is smaller than or equal to the thickness of the outer chain plate of the chain.
7. The color change type stress sensor according to claim 1, wherein the transparent jacket is made of one of PA, PE, PER and PC.
8. An overload indication safety chain comprises an outer chain plate and is characterized in that the outer side of the outer chain plate is provided with the color change type stress sensor according to any one of the claims 1-7 in a mechanical coupling mode, and the color change type stress sensor synchronously deforms along with the outer chain plate.
9. The overload indicating safety chain as claimed in claim 8, wherein the outer link plate has an opening at a central location of a surface thereof, and the color change type stress sensor is fixed in the opening.

Description

Color change type stress sensor and overload indication safety chain formed by same Technical Field The utility model belongs to the technical field of chain stress sensing, and particularly relates to a color change type stress sensor and an overload indication safety chain formed by the color change type stress sensor. Background The chain is used as a mechanical transmission unit and is widely applied to various fields of industry, traffic and the like, the main functions of the chain comprise power transmission, material conveying, synchronous control and the like, in the running process, the periodically alternating load can generate stress on the chain, the stress comprises tensile stress or bending stress, and if the stress is larger than the bearing threshold value of the chain due to overload, the problems of plastic deformation, continuous shift fracture or pin shaft abrasion and the like of the chain are caused, so that the safety and the service life of equipment are seriously influenced. At present, the monitoring of the stress state of the chain mainly depends on methods such as tensiometer detection, strain gauge mounting, machine vision detection and the like, but certain limitations exist, and specifically: the tensiometer detection method mainly calculates the stress by measuring the whole tension of the chain, and has the defect that the local stress concentration point of the single-side chain plate cannot be positioned; The strain gauge mounting measurement method is characterized in that a resistance strain gauge is adhered to the surface of the chain plate, and the load is calculated according to the strain-stress relation, so that the method has the defects of complex installation, easy falling and difficulty in covering multiple chain links; The machine vision detection method captures chain deformation or cracks through a camera and analyzes damage by combining an AI algorithm, and the defect is that the internal stress distribution cannot be monitored in real time due to the fact that the machine vision detection method depends on illumination conditions. Based on the analysis, the application designs a color change type stress sensor and an overload indication safety chain formed by the color change type stress sensor. Disclosure of utility model The utility model aims to provide a color change type stress sensor and an overload indication safety chain formed by the color change type stress sensor, so as to solve the defects in the prior art. In order to solve the above problems, the present solution provides a color-changing stress sensor, which includes a transparent casing, a color-changing component is sealed inside the transparent casing, the color-changing component includes a color-developing material and a color-developing agent, the color-developing agent is sealed in a tube body, the tube body is made of a fragile material, and the tube body is subjected to an external dynamic stress with a certain intensity to be structurally broken so as to release the color-developing agent to make the color-developing material contact with the tube body. As the preferable scheme of the application, the pipe body is longitudinally arranged in the transparent outer casing, and two ends of the pipe body are abutted against the inner wall of the transparent outer casing. As a preferable scheme of the application, a buffer cushion is arranged at the position of the pipe body, which is abutted against the inner wall of the transparent outer sleeve shell, the buffer cushion comprises a plurality of critical buffer thresholds, the buffer cushion with one critical buffer threshold and the pipe body form a buffer pipe body with a corresponding grade, when the external stress reaches the critical buffer threshold, the corresponding buffer cushion is invalid, and the buffer pipe body is structurally broken to release the color developing agent. As a preferable scheme of the application, the pipe body is a thin-wall glass pipe. As a preferable scheme of the application, the color development principle of the color development material and the color development agent adopts any one of oxidation reduction color development, humidity-sensitive color development and acid-base color development. As the preferable scheme of the application, the transparent outer sleeve is in a strip shape or a dumbbell shape, and the size of the transparent outer sleeve is smaller than or equal to the thickness of the outer chain plate of the chain. As a preferable scheme of the application, the transparent jacket shell is made of any one of PA, PE, PER and PC. The application also provides an overload indication safety chain, which comprises an outer chain plate, wherein the outer side of the outer chain plate is provided with the color change type stress sensor in a mechanical coupling mode, and the color change type stress sensor synchronously deforms along with the outer chain plate. As a preferable scheme of the