GB704290A - A method for testing the mechanical strength of coal and a device for carrying out the method - Google Patents

A method for testing the mechanical strength of coal and a device for carrying out the method

Info

Publication number
GB704290A
GB704290A GB784/52A GB78452A GB704290A GB 704290 A GB704290 A GB 704290A GB 784/52 A GB784/52 A GB 784/52A GB 78452 A GB78452 A GB 78452A GB 704290 A GB704290 A GB 704290A
Authority
GB
United Kingdom
Prior art keywords
plunger
pin
bore hole
coal
spindle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB784/52A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KOHLENBERGBAU LEITUNG DEUTSCHE
Original Assignee
KOHLENBERGBAU LEITUNG DEUTSCHE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KOHLENBERGBAU LEITUNG DEUTSCHE filed Critical KOHLENBERGBAU LEITUNG DEUTSCHE
Publication of GB704290A publication Critical patent/GB704290A/en
Expired legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C39/00Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

704,290. Testing physical qualities of coal. DEUTSCHE KOHLENBERGBAU-LEITUNG. Jan. 10, 1952 [Jan. 18, 1951; May 17, 1951], No. 784/52. Class 106 (2) The mechanical strength of coal is measured by forming a bore hole in the coal and determining the force required to drive a pin into the wall of the bore hole. In Fig. 1 a body b, in a bore hole a, carries a probe pin g on the frontal face of a plunger e, the plunger e being movable outwardly of the body b by oil pressure acting through a pipe h. The pressure required to cause a required penetration of the pin g into the coal is indicated on a pressure gauge q, further outward movement of the plunger e uncovering a pipe k allowing the compressed oil to return to an oil container p. By closing the pipe h and supplying the pressure medium through a pipe i to act on the plunger e in the reverse direction, the plunger can be moved backwards and the pin g brought within the circumference of the body b. A packing piece s, which holds the plunger e in the body b, can be unscrewed to allow the plunger e to be exchanged. The probe pin g is also exchangeably attached to the plunger e. Additional plungers l<SP>1</SP>, l<SP>11</SP> in the body b are arranged to be pressed by oil pressure against that side of the bore hole wall which is opposite to the side at which the probe pin g projects, thus ensuring a snug and immovable contact of the testing device with the wall of the bore hole. In a second embodiment, Fig. 5, the body b is securely fixed in the bore hole a by turning a screwed spindle i, through a handle j, the resulting axial movement of the spindle i being adapted to cause an outward movement of opposed clamping jaws g. When the body b is securely located in the bore hole a, a further turning of the spindle i causes it to abut against a capsule o from which a pin d projects, increasing pressure on the capsule o presses the pin d into the coal and the force applied therefore is read off on a pressure gauge f connected to the capsule. After terminating the movement, the spindle i is turned back again, whereupon the jaws g return to their initial position within the body b under the action of springs h. The pin d may be arranged to move in a direction at right angles to the axis of the body b.
GB784/52A 1951-01-18 1952-01-10 A method for testing the mechanical strength of coal and a device for carrying out the method Expired GB704290A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE704290X 1951-01-18

Publications (1)

Publication Number Publication Date
GB704290A true GB704290A (en) 1954-02-17

Family

ID=6615841

Family Applications (1)

Application Number Title Priority Date Filing Date
GB784/52A Expired GB704290A (en) 1951-01-18 1952-01-10 A method for testing the mechanical strength of coal and a device for carrying out the method

Country Status (1)

Country Link
GB (1) GB704290A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2816438A (en) * 1954-06-03 1957-12-17 John B Prather Apparatus for testing hardness of inside surfaces
US2835127A (en) * 1954-03-03 1958-05-20 Robert C Scott Hardness tester
US2892345A (en) * 1954-09-27 1959-06-30 Torsion Balance Company Inner face hardness tester
US3175392A (en) * 1961-10-16 1965-03-30 Earl H Tharalson Soil testing apparatus
US3283566A (en) * 1964-01-29 1966-11-08 Dale H Fietz Material hardness tester
CN102455308A (en) * 2010-10-28 2012-05-16 宝山钢铁股份有限公司 Lump coal pyrolysis experimental method for melting gasification furnace

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2835127A (en) * 1954-03-03 1958-05-20 Robert C Scott Hardness tester
US2816438A (en) * 1954-06-03 1957-12-17 John B Prather Apparatus for testing hardness of inside surfaces
US2892345A (en) * 1954-09-27 1959-06-30 Torsion Balance Company Inner face hardness tester
US3175392A (en) * 1961-10-16 1965-03-30 Earl H Tharalson Soil testing apparatus
US3283566A (en) * 1964-01-29 1966-11-08 Dale H Fietz Material hardness tester
CN102455308A (en) * 2010-10-28 2012-05-16 宝山钢铁股份有限公司 Lump coal pyrolysis experimental method for melting gasification furnace
CN102455308B (en) * 2010-10-28 2014-03-19 宝山钢铁股份有限公司 Lump coal pyrolysis experimental method for melting gasification furnace

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