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Post by John on May 14, 2017 13:38:29 GMT -5
Has anyone ever come across this invention, it's based on overhead crane busbars, first time I've come across this idea for face work though.
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Post by dazbt on May 15, 2017 12:04:46 GMT -5
Has anyone ever come across this invention, it's based on overhead crane busbars, first time I've come across this idea for face work though. For some reason the sound is baffled on this video for me at least but yes, I remember this system designed and manufactured by Pitcraft Sure Power, I have mentioned it on this site previously as well as their later,even more incredible system that attempted to combine this power cable-less system with a water hose-less arrangement, the water flowing into a trough below the buss bars and "scooped up" by the shearer via an onboard Pitcraft water pump. |
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Post by dazbt on May 15, 2017 12:43:42 GMT -5
Advancing and Retreating Longwall Faces. Dec 21, 2004 at 8:13pm Quote Post by on Dec 21, 2004 at 8:13pm Haulage ropes were evil, and particularly so on the shearer, any fitter that had to tension one will shudder at their very mention, let alone the face workers that witnessed one breaking. I once and only once was on a face where the shearer haulage rope broke and once where the rope came through the banjo clamping device, luckily no one was hurt in either but I bet that ropes accounted for many injuries. A friend of mine was killed at a local colliery by a haulage chain breakage. The first chainless haulage system that I worked on was the Pitcraft Rackatrack (Sp?) at Nostell Colliery I think in the late 1960's, a fantastic concept but at that time only a little less dangerous than the chain systems, the non retained horizontal rack pins were frequently fired into the direction of the goaf at the speed of cannon shells, not always easy to avoid in a yard thick seam. Pitcrafts second chainless system incorporated a different design in which the pins were postioned vertically which at least elimated the risk of being shot through the ribs by a 50mm hardened steel pin whilst crawling at the side of the shearer. I give credit to Pitcraft in pioneering chainless haulage and several other innovational face systems, contra rotating drums, cable-less and hose-less shearers.
Read more: coalmine.proboards.com/search/results?captcha_id=captcha_search&what_at_least_one=pitcraft&when_days=20000&who_only_made_by=0&display_as=0&search=Search#ixzz4hAcmz1Dt |
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Post by John on May 15, 2017 14:29:51 GMT -5
Has anyone ever come across this invention, it's based on overhead crane busbars, first time I've come across this idea for face work though. For some reason the sound is baffled on this video for me at least but yes, I remember this system designed and manufactured by Pitcraft Sure Power, I have mentioned it on this site previously as well as their later,even more incredible system that attempted to combine this power cable-less system with a water hose-less arrangement, the water flowing into a trough below the buss bars and "scooped up" by the shearer via an onboard Pitcraft water pump. |
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boaz
Trainee
Posts: 37
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Post by boaz on May 16, 2017 3:37:33 GMT -5
For some reason the sound is baffled on this video for me at least but yes, I remember this system designed and manufactured by Pitcraft Sure Power, I have mentioned it on this site previously as well as their later,even more incredible system that attempted to combine this power cable-less system with a water hose-less arrangement, the water flowing into a trough below the buss bars and "scooped up" by the shearer via an onboard Pitcraft water pump. The SurePower system was installed at Allerton Bywater Colliery, N Yorks Area. The bus bars were monitored for methane and isolated if the methane concentration became too high. The Electrical Engineers at the mine overseeing the project were Ray Lancaster and Peter Marsh. There was also a system installed in the Midlands area. |
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Post by dazbt on May 16, 2017 5:36:42 GMT -5
I must have missed that post Daz, as I had never heard of a trailing cable less face. The SurePower system was installed at Allerton Bywater Colliery, N Yorks Area. The bus bars were monitored for methane and isolated if the methane concentration became too high. The Electrical Engineers at the mine overseeing the project were Ray Lancaster and Peter Marsh. There was also a system installed in the Midlands area. I think the Midland's installation may have been at Ellistown Colliery in Leicestershire, not sure about the water hose-less system though. |
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