CN-121977736-A - Quick-mounting probe for in-situ detection of intelligent bolts with double rocking balls on floor type holding pole

CN121977736ACN 121977736 ACN121977736 ACN 121977736ACN-121977736-A

Abstract

The invention belongs to the technical field of ultrasonic pretightening force detection, and discloses a fast-assembling probe for in-situ detection of intelligent bolts of double-rocking-type ground poles. The fast-assembling probe comprises a metal shell, a central electrode, an insulating layer, an annular conductive spring and a rubber fixing ring. The metal shell provides protection support and conductive function, the central electrode bears conductive function, electrical isolation is realized between the central electrode and the metal shell through an insulating layer, an annular groove is processed on the inner wall of the metal shell for installing and fixing a rubber fixing ring, the rubber fixing ring is used for ensuring stable installation and fixing of the probe, the annular conductive spring is installed in the groove formed by the inner wall of the metal shell and the rubber fixing ring, and the annular conductive spring has conductive and elastic connection characteristics. The probe provided by the invention has the advantages of convenience in use, simple structure, low production cost, high detection efficiency, stable and reliable connection and low processing and assembling difficulty.

Inventors

LU FEI
YUAN ZHIWEI
JIN CHENGSHENG
GONG QUAN
WANG TAO
DING ZHENFENG
WU TAO

Assignees

华东送变电工程有限公司
大连理工大学

Dates

Publication Date: 20260505
Application Date: 20260115

Claims (6)

1. The quick-mounting probe for the in-situ detection of the intelligent bolt of the double-rocking floor-type derrick is characterized by comprising a central electrode, a metal shell, an insulating layer, an annular conductive spring and a rubber fixing ring; The central electrode is columnar, one end of the central electrode is used for connecting a cable connector of external measurement and signal processing equipment, and the other end of the central electrode is a smooth spherical end and is in contact with an electrode of an ultrasonic transducer arranged at the tail part of the ultrasonic intelligent bolt; The metal shell is horn-shaped, and is provided with openings at two ends, and is divided into a large opening end and a small opening end, wherein the large opening end is used for being connected with an ultrasonic intelligent bolt, and the small opening end is used for being connected with external measuring and signal processing equipment; the insulating layer is tubular, is tightly wrapped outside the central electrode, and forms a component arranged at the small opening end of the metal shell for isolating the central electrode from the metal shell; The annular conductive spring is arranged in the metal shell; The rubber retainer plate is annular, sets up in the recess of metal casing inner wall.
2. The quick-mounting probe for in-situ detection of double-rocking e.g. floor-type derrick intelligent bolts according to claim 1, wherein the inner diameter of the annular conductive spring is smaller than the outer diameter of the ultrasonic intelligent bolts or nuts, and the annular conductive spring is tightly attached to the surfaces of the ultrasonic intelligent bolts or nuts through self elasticity to establish electrical connection between the metal shell and the ultrasonic intelligent bolts or nuts.
3. The quick-mounting probe for the intelligent bolt in-situ detection of the double-rocking e.g. floor-type derrick according to claim 1, wherein the rubber fixing ring is annular and is positioned on the outer side of the annular conductive spring, friction force is provided by the friction fixing ring through contact with the outer surface of the ultrasonic intelligent bolt or nut, the quick-mounting probe is primarily fixed, vibration can be buffered by the rubber fixing ring, and stability of the quick-mounting probe is ensured.
4. The quick-mounting probe for detecting double-rocking e.g. floor-type anchor rod intelligent bolts in situ according to claim 1, wherein the inner diameter of the rubber fixing ring is smaller than the outer diameters of the annular conductive spring and the nut, and the outer diameter is larger than the inner diameter of the small opening end of the metal shell and smaller than the inner diameter of the groove of the inner wall of the metal shell 3.
5. The fast-assembled probe for in-situ detection of double-rocking e.g. floor-type derrick intelligent bolts according to claim 1, wherein the insulating layer wraps the central electrode and is fixed by a bonding or thermal shrinkage process to ensure electrical isolation.
6. The quick-mounting probe for the intelligent bolt in-situ detection of the double-rocking-type ground-holding pole according to claim 1 is characterized in that the quick-mounting probe is aligned and pushed with the intelligent ultrasonic bolt, a rubber fixing ring is contacted with the surface of the intelligent ultrasonic bolt and fixes the position of the quick-mounting probe through friction, an annular conductive spring is electrically connected with the surface of the intelligent ultrasonic bolt through elasticity of the annular conductive spring, and meanwhile, the smooth spherical surface end of a center electrode is contacted with the electrode surface of an ultrasonic transducer mounted at the tail of the intelligent ultrasonic bolt, so that the quick-mounting probe is mounted.

Description

Quick-mounting probe for in-situ detection of intelligent bolts with double rocking balls on floor type holding pole Technical Field The invention belongs to the technical field of ultrasonic pretightening force detection, and relates to a fast-assembling probe for in-situ detection of intelligent bolts of double-rocking-type ground poles. Background In the process of manufacturing and maintaining the holding pole, the ultrasonic intelligent bolt gradually becomes a core component for ensuring the safe and stable operation of the structure by virtue of the unique advantages of the ultrasonic intelligent bolt. Through at bolt surface mounting ultrasonic transducer, ultrasonic intelligent bolt can monitor the pretightning force state of bolt in real time, accurately to provide important data support for the health management of double rocking e.g. ground anchor rod bolt pretightning force. At present, test probes for ultrasonic intelligent bolts are mainly divided into two types, namely permanent type and detachable type. The permanent test probe is usually fixed on the ultrasonic intelligent bolt permanently by adopting the processes of welding or strong bonding and the like, so that the tight combination of the probe and the bolt is realized. This approach ensures stability of signal transmission, but also brings about a number of limitations. First, once installed, the permanent probe is difficult to disassemble and replace, and if the probe fails, the entire bolt assembly may need to be replaced, increasing both maintenance costs and operational complexity. Secondly, the installation process is environmentally and technically demanding and is not suitable for application scenarios where frequent replacement or maintenance of the probe is required. Removable test probes provide greater flexibility, and common types include magnetic probes, threaded probes, and thimble-fixed probes. The magnetic probe is convenient to install and is widely applied to various occasions. It is connected with the bolt through magnetic force, does not need complicated location and fixed operation. However, for some special alloy materials and bolts lacking in magnetic permeability, the magnetic probe cannot function, so that the application range of the magnetic probe is limited. The thimble fixed probe provides a solution for the limitation of the magnetic probe. The connection is realized through the contact of the thimble and the surface of the head of the bolt. Although the mode overcomes the defects of the magnetic probe to a certain extent, the shape of the head of the bolt is required to be high, the thimble must be perpendicular to the axis of the bolt, and the head of the bolt with a special shape cannot be used. The threaded probe is fixed by screwing the probe onto the threads of the tail of the bolt, and ultrasonic signals are excited at the tail of the bolt. The threaded probe has low dependence on the shape and material properties of the head of the bolt, but has the requirement of bolt length, and the tail of the bolt is exposed from two to three complete threads after the bolt is assembled. In addition, the installation position of the threaded probe is usually positioned at the tail part of the bolt, and part of the installation scene needs blind installation of operators, so that the flexibility is insufficient, and even the installation cannot be completed. Disclosure of Invention Aiming at the problems of the existing ultrasonic intelligent bolt test probes, the invention aims to provide a quick-assembly probe for in-situ detection of double-rocking-angle-type ground-holding intelligent bolts. The probe has the characteristic of quick installation, and can be rapidly positioned and put into use in a complex structure. Meanwhile, the probe has good universality and has no requirements on the shape, the material property, the length and the like of the head of the ultrasonic intelligent bolt. The invention has simple installation and operation, stable and reliable connection and can greatly improve the efficiency and quality of the test. The technical scheme of the invention is as follows: A quick-assembly probe for detecting double-rocking-type intelligent bolts of a floor-type derrick comprises a central electrode, a metal shell, an insulating layer, an annular conductive spring and a rubber fixing ring; The central electrode is columnar and made of high-conductivity metal materials such as gold, one end of the central electrode is used for connecting a cable joint of external measurement and signal processing equipment, and the other end of the central electrode is a smooth spherical end and is in contact with an electrode of an ultrasonic transducer arranged at the tail part of an ultrasonic intelligent bolt; The metal shell is horn-shaped, two ends of the metal shell are open and are divided into a large open end and a small open end, the large open end is used for being connected with an ultrasonic intel