GB1139372A - Improvements in or relating to the controlling of mining machines - Google Patents
Improvements in or relating to the controlling of mining machinesInfo
- Publication number
- GB1139372A GB1139372A GB25767A GB25767A GB1139372A GB 1139372 A GB1139372 A GB 1139372A GB 25767 A GB25767 A GB 25767A GB 25767 A GB25767 A GB 25767A GB 1139372 A GB1139372 A GB 1139372A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- output
- contacts
- motor
- pump
- 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
Links
- 238000005065 mining Methods 0.000 title abstract 5
- 238000004804 winding Methods 0.000 abstract 2
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/24—Remote control specially adapted for machines for slitting or completely freeing the mineral
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/04—Safety devices
- E21C35/043—Protection against overload during transfer of machines for slitting or completely freeing the mineral from the seam
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Control Of Multiple Motors (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Sawing (AREA)
Abstract
1,139,372. Mineral-mining machines. GEBR. EICKHOFF MASCHINENFABRIK U. EISENGIESSEREI m.b.H. 3 Jan., 1967 [12 Jan., 1966], No. 257/67. Heading E1F [Also in Division G3] A mining machine of the type arranged to be advanced by hydraulic mechanism including a pump controlled by an electromagnetic valve 44 comprises a number of electric motors such as 1, 2 each driving a cutting tool, and is provided with a control system for adjusting the output of the pump in dependence upon the load current taken by the motors. As shown, a signal proportional to the load current taken by motor 1 is derived from a transformer 3 and is compared with a reference voltage in a transistorised comparator circuit 5 which produces an output to energise a relay 21 if the load current is below a predetermined value, or an output to energise a relay 19 if the current is above the said value. Relay 19 has a normally open contact 23 and a normally closed contact 25, and relay 21 has a normally open contact 27. A sensing transformer 4, a comparator 6, a relay 20 with contacts 24, 26, and a relay 22 with a contact 28 are similarly associated with the motor 2. The contacts 25, 27, 28, 29 are in series with the "increase output" winding 34 of the valve 44, and the contacts 23, 24 are in parallel with the "decrease output" winding 37 of the valve 44 which is powered from a supply derived from a transformer 30. In operation, if both motors are loaded below their rated values, relays 21 and 22 are energised so that contacts 25, 27, 28, 29 are closed and the valve 44 thereby energised to increase the pump output, whereby the speed of advance of the mining machine is increased. Should one motor, say motor 1, thereby become, overloaded comparator 5 will produce an output to energise relay 19 instead of relay 21, contacts 25 and 27 will open, and contact 23 will close thereby to interrupt the "increase output" circuit of the pump 44 and to close the "decrease output" circuit, whereby the speed of advance of the mining machine is reduced and the machine is protected against overloading of any of its cutters.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEE30824A DE1265688B (en) | 1966-01-12 | 1966-01-12 | Feed control of cutting or mining machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1139372A true GB1139372A (en) | 1969-01-08 |
Family
ID=7074715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25767A Expired GB1139372A (en) | 1966-01-12 | 1967-01-03 | Improvements in or relating to the controlling of mining machines |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1265688B (en) |
| GB (1) | GB1139372A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2475112A1 (en) * | 1980-02-02 | 1981-08-07 | Gewerk Eisenhuette Westfalia | FELLING DEVICE FOR DOWNHOLE MINING WITH FORWARD CONTROL REGULATION |
| WO2015148668A3 (en) * | 2014-03-25 | 2015-12-30 | Caterpillar Global Mining Europe Gmbh | System for controlling speed of travel in a longwall shearer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1592354A (en) * | 1976-11-11 | 1981-07-08 | Anderson Strathclyde Ltd | Mineral mining machine cutter driving mechanism having a load sensing device to regulate the haulage speed of the machine when the cutter driving mechanism is overloaded |
-
1966
- 1966-01-12 DE DEE30824A patent/DE1265688B/en active Pending
-
1967
- 1967-01-03 GB GB25767A patent/GB1139372A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2475112A1 (en) * | 1980-02-02 | 1981-08-07 | Gewerk Eisenhuette Westfalia | FELLING DEVICE FOR DOWNHOLE MINING WITH FORWARD CONTROL REGULATION |
| WO2015148668A3 (en) * | 2014-03-25 | 2015-12-30 | Caterpillar Global Mining Europe Gmbh | System for controlling speed of travel in a longwall shearer |
| CN106133274A (en) * | 2014-03-25 | 2016-11-16 | 卡特彼勒环球矿业欧洲有限公司 | For controlling the system of the gait of march of longwall shearer |
| CN106133274B (en) * | 2014-03-25 | 2019-02-19 | 卡特彼勒环球矿业欧洲有限公司 | System for controlling the travel speed of longwall shearer |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1265688B (en) | 1968-04-11 |
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