Online testing device for hob blade string abrasion of heading machine

A technology of roadheader and hob, which is applied in the direction of measuring device, acceleration measurement, speed/acceleration/impact measurement, etc. It can solve the problem that the hob blade loses its rock-breaking function, and achieve the effect of ensuring the efficiency of tunneling

Active Publication Date: 2013-07-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During excavation, if the hob blade cannot rotate due to rocks being stuck, etc., if the cutter head continues to rotate, the hob blade will undergo string grinding and lose its rock-breaking function.

Method used

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  • Online testing device for hob blade string abrasion of heading machine
  • Online testing device for hob blade string abrasion of heading machine
  • Online testing device for hob blade string abrasion of heading machine

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Embodiment Construction

[0019] The principle and structure of the present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments. It should be noted that this embodiment is illustrative rather than limiting, and the protection scope of the present invention is not limited by this example.

[0020] The device for on-line detection of hob string grinding for roadheaders has the following structural features: the cutter head 1 is provided with a base 2 for installing the hob, the hob 4 is set on the tool center shaft 5 through the bearing 3, and the center shaft is installed in a frame On the knife rest 6, the knife rest is assembled in the base. A rectangular hole 7 is respectively arranged on both sides of the central axis 5 outside the knife holder 6, and the two rectangular holes are located on the horizontal axis of the central axis of the tool. The acceleration sensor 8 is placed in the rectangular hole, and the hole wall of the re...

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Abstract

The invention discloses an online testing device for hob blade string abrasion of a heading machine. The online testing device is characterized in that a hob is sleeved on a hob center shaft through a bearing, and the center shaft is mounted on a frame hob holder which is assembled in a base of a hob plate. Acceleration sensors can sense the moving state of the hob to emit signals, so that rectangular holes are arranged on two sides of the center shaft outside the hob holder and on a horizontal axis of the hob center shaft. The acceleration sensors are disposed in the rectangular holes, the hole walls of the rectangular holes close to the direction of the hob center shaft is planes, and the planes serve as measuring surfaces of the acceleration sensors. If the hob blade string abrasion occurs, the vibration state of the hob can be changed, that is, the hob vibration amplitude and frequency can be changed obviously. The acceleration sensors can determine whether the hob blade enters a string abrasion state according to the detected vibration amplitude and frequency, the hob working state can be mastered timely, and the hob can be replaced timely in case of abrasion, accordingly, the heading efficiency can be guaranteed.

Description

technical field [0001] The invention belongs to large-scale mechanical construction equipment, in particular to a device for monitoring the wear of hobs used in full-section hard rock tunneling machines. technical background [0002] Full-face hard geological tunnel boring machines include hard rock tunnel boring machines and composite shield tunnel boring machines. The former is mainly used for the construction of underground traffic projects such as tunnels and culverts in rocky geological structures; the latter is mainly used for tunneling geological structures with both soil and rock. . The cutterhead of the hard rock roadheader is equipped with a hob; the cutterhead of the compound shield tunneling machine has both a scraper and a hob (for the convenience of description, it is collectively referred to as a roadheader). Under the action of the propulsive force of the roadheader, the hob on the cutter head presses against the rock surface, and with the rotation of the cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/087E21D9/11G01P15/00
Inventor 侯振德岳澄亢一澜蔡宗羲陈超
Owner TIANJIN UNIV
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