Device and method for detecting wall abrasion of solid filler feeding well

Patent metadata

Field	Value
Publication number	US-10113854-B2
Application number	US-201515116800-A
Country	US
Kind code	B2
Filing date	Jun 16, 2015
Priority date	Sep 3, 2014
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

Disclosed is a device for detecting wall abrasion of a solid-filling feeding well and a detection method thereof. The device comprises a well wall abrasion detector, a horizontal displacement meter, a vertical displacement monitor, and a limit guide rod. One end of the limit guide rod is connected to the well wall abrasion detector. The signal output terminal of the well wall abrasion detector is connected to the signal input terminal of the horizontal displacement meter, and the other end of the limit guide rod passes through the vertical displacement monitor for slidable setting. This disclosure mainly utilizes a resistance strain displacement sensor to detect the abrasion and deformation degree of the well wall, determines the position of damages with the vertical displacement monitor, and draws wall abrasion curves by using the obtained data. The device provided is easy to use, has low cost, has high reliability, and can effectively detect the wall abrasion condition of a solid-filling feeding well, thereby providing a basis for ensuring the working efficiency of the feeding well.

First claim

The invention claimed is:

1. A device for detecting wall abrasion of a solid-filling feeding well, comprising a well wall abrasion detector, a horizontal displacement meter, a vertical displacement monitor, and a limit guide rod, wherein, one end of the limit guide rod is connected to the well wall abrasion detector, a signal output terminal of the well wall abrasion detector is connected to a signal input terminal of the horizontal displacement meter, and another end of the limit guide rod passes through the vertical displacement monitor for slidable setting, wherein: the well wall abrasion detector comprises several sets of detection arms, and each set of detection arms comprises a resistance strain displacement sensor, a signal amplifier, an electromagnet, a power supply, a displacement transfer rod, a fine-tuning nut, and a damage detection head, the resistance strain displacement sensor, power supply, and signal amplifier are fixed in each set of detection arms, respectively, the electromagnet is fixed on the resistance strain displacement sensor, one end of the displacement transfer rod is disposed at a position corresponding to the electromagnet, the other end of the displacement transfer rod is fixed to the damage detection head via the fine-tuning nut, the displacement transfer rod can extend and retract elastically along an axial direction, the power supply supplies power to the electromagnet, the signal output terminal of the resistance strain displacement sensor is connected to the signal input terminal of the signal amplifier, and the signal output terminal of the signal amplifier is connected to the signal input terminal of the horizontal displacement meter.

2. The device according to claim 1 , wherein:
the detection arm further comprises a return spring and a detection arm housing, one end of the displacement transfer rod is limited in the detection arm housing in a radial direction, and is driven by the return spring disposed in the detection arm to extend and retract elastically in the axial direction.

3. The device according to claim 1 , wherein:
the device further comprises a rotation controller, one end of the limit guide rod is rotatably connected to the well wall abrasion detector, and a signal output terminal of the rotation controller is connected to a signal input terminal of the well wall abrasion detector.

4. The device according to claim 1 , wherein:
the vertical displacement monitor is fixedly disposed on a detection platform, which is built at the entry of a well wall.

5. The device according to claim 4 , wherein:
the horizontal displacement meter is fixedly disposed on the detection platform.

6. A method for detecting wall abrasion of a solid-filling feeding well with the device of claim 1 , the method comprising:
a. determining the inner diameter d 0 of a feeding well, actuating the power supply, and fine tuning the damage detection head so that the excircle diameter d of the well wall abrasion detector is d=d 0 +Δd;
b. when the equipment on the detection platform is ready, adjusting the displacement meter and the vertical displacement monitor to a same data recording frequency, placing the well wall abrasion detector together with a limit guide rod into the feeding well to be detected, and at this time the well wall abrasion detector being disposed at a segment of the well shaft without abrasion near the well mouth and recording the initial reading ma on the horizontal displacement meter, the initial reading no on the vertical displacement monitor, and the distance h between the well wall abrasion detector and the well mouth;
c. when the preparation is completed, moving the well wall abrasion detector together with the limit guide rod downward along the well wall at a constant speed, starting data recording with the horizontal displacement meter and the vertical displacement monitor, and connecting each segment of limit guide rod fixedly, until the well wall abrasion detector reaches the well bottom;
d. subtracting the initial reading m 0 from the data recorded by the horizontal displacement meter to obtain a first set of data; subtracting (m 0 −h) from the data recorded by the vertical displacement monitor to obtain a second set of data; taking the second set of data as horizontal coordinate and taking the first set of data as vertical coordinate to obtain a wall abrasion curve at that azimuth angle;
e. lifting the well wall abrasion detector to the well mouth, turning it by 45° in relation to its original position along the circumferential direction of the well shaft, and
f. repeating a, b, c, and d;
wherein, “d 0 ” is the inner diameter of the well wall of the feeding well before abrasion, “Δd” is the increment of excircle diameter of the well wall abrasion detector obtained by adjusting the damage detection head with the fine-tuning nut, “d” is the excircle diameter of the well wall abrasion detector to be moved into the feeding well, “m 0 ” is the initial reading of the horizontal displacement meter when the well wall abrasion detector is to be moved into the feeding well, and “n 0 ” is the initial reading of the vertical displacement monitor when the well wall abrasion detector is to be moved into the feeding well.

7. The method according to claim 6 , wherein the value of “Δd” is within a range of 30 mm to 40 mm.

8. A method for detecting wall abrasion of a solid-filling feeding well with a device for detecting wall abrasion of a solid-filling feeding well, wherein, the method comprises the following steps:
a. determining inner diameter d 0 of the feeding well, turning on a switch of a power supply, and adjusting a damage detection head with a fine-tuning nut, so that an excircle diameter d of the well wall abrasion detector is d=d 0 +Δd;
b. when equipment on a detection platform is ready, adjusting a displacement meter and a vertical displacement monitor to a same data recording frequency, placing the well wall abrasion detector together with a limit guide rod into the feeding well to be detected, and at this time the well wall abrasion detector being disposed at a segment of a well shaft without abrasion near a well mouth and recording an initial reading m 0 on a horizontal displacement meter, an initial reading no on a vertical displacement monitor, and distance h between the well wall abrasion detector and the well mouth;
c. when the preparation is completed, moving the well wall abrasion detector together with the limit guide rod downward along the well wall at a constant speed, starting data recording with the horizontal displacement meter and the vertical displacement monitor, and fixedly connecting each segment of limit guide rod until the well wall abrasion detector reaches the well bottom;
d. subtracting the initial reading ma from the data recorded by the horizontal displacement meter to obtain a first set of data; subtracting (m 0 −h) from the data recorded by the vertical displacement monitor to obtain a second set of data; taking the second set of data as horizontal coordinate and taking the first set of data as vertical coordinate to obtain a wall abrasion curve at that azimuth angle;
e. lifting the well wall abrasion detector to the well mouth, turning it by 45° in relation to its original position along the circumferential direction of the well shaft, and repeating the steps a-d;
wherein, “d 0 ” is the inner diameter of well wall of the feeding well before abrasion, “Δd” is the increment of excircle diameter of the well wall abrasion detector obtained by adjusting the damage detection head with the fine-tuning nut, “d” is the excircle diameter of the well wall abrasion detector to be moved into the feeding well, “m 0 ” is the initial reading of the horizontal displacement meter when the well wal

Assignees

• Univ China Mining

Inventors

• Zhang Jixiong
• Qi Wenyue
• Zhang Qiang
• Huang Peng
• Sun Qiang

Classifications

• G01B7/13 Primary

  Internal diameters · CPC title

• G01B3/46

  Plug gauges for internal dimensions with engaging surfaces which are at a fixed distance, although they may be preadjustable · CPC title

• E21B47/09

  Locating or determining the position of objects in boreholes or wells {, e.g. the position of an extending arm}; Identifying the free or blocked portions of pipes · CPC title

• G01B7/18

  using change in resistance · CPC title

• E21F15/00

  Methods or devices for placing filling-up materials in underground workings (dams E21F17/103 {; chocks made of flexible containers filled with backfilling material E21D15/483}) · CPC title