摘要:
A link chain or a chain link for scraper chain conveyors with vertical and horizontal chain links which are interlinked in an articulated manner for scraper chain conveyors for use in mining. In particular to horizontal chain links with front sections with a straight face zone and with longitudinal limbs, which connect the front sections around an oval inner opening and which are provided on their outer surfaces with a recess, wherein the rear sides of front sections delimiting the inner opening form a contact zone for circular arcs of vertical chain links. In order to improve the service life of the link chain, the rear sides, which face oval inner opening, of front sections are provided with a surface which has a hollow, which forms a central region of the contact zone, between a fillet cambered in a crowned manner.
摘要:
An entry conveyor including a conveyor pan formed by a plurality of pan sections that are hingeably connected to each other, at the two ends of which conveyor pan drive stations and/or return stations for a scraper chain are provided. Each pan section includes a top strand delimited by lateral profiles and the conveyor base and a bottom strand for the scraper chain as well as receiving elements for a pan section connecting mechanism, which elements are disposed outside of the lateral profiles. A pan strand including a plurality of pan sections that are disposed behind each other is provided in the conveyor pan, which sections are hingeably coupled via a center swivel bearing disposed on the center longitudinal axis of the conveyor pan or the pan sections. The invention also relates to the pan sections with the center swivel bearings.
摘要:
The present invention relates to a conveyor pan (110) for underground face or gate conveyors, with a pair of side parts (101) comprising cast parts which include cast vertical arms (113) extending over the height of the bottom run (106) and the top run (107), a lower cast flange arm (111) extending outwards to the rear, a cast foot flange (112) extending inwards onto whose lower side a base plate (104) is welded which closes the bottom run to the bottom, as well as on the end faces cast accepting elements (114) for the means of joining conveyor pans, and with a conveyor pan base (105) preferably comprising a rolled sheet. This has tongue like segments (109) on both long sides, which engage in cut-out slots (135) in the vertical arms (113) of the side parts (101) and are welded to them on the outer of the side parts (101).
摘要:
The invention relates to a plough chain strand 50 with horizontal chain links and vertical chain links including normal chain links 30, 40, the chain link legs of which are connected by chain link arcs and engage one another alternately in an intractable manner. In the chain strand 50 in front of and behind the chain connector link 10 is arranged in the same installation position as this at least one special chain link 20, the link legs of which comprise the same outer contour, especially the same width and the same thickness, as the outer legs of the connector link parts of the chain connector link 10. Due to the special chain links 20 preceding and trailing the chain connector link and having the same or a marginally larger contour as this, the wear of the chain connector link 10 of the chain strand 50 according to the invention is reduced or avoided if compared to known plough chains.
摘要:
A drive system for chain sprockets 1 of chain drives, more particularly for driving chain scraper conveyors or chain-drawn ploughs for underground mining, with a drive assembly formed of an asynchronous motor and a gear mechanism 4, the gear mechanism 4 being designed as overload gearing and having a controllable multiple-disk clutch for overload equalisation with which the force flow between the asynchronous motor and the chain sprocket can be disconnected. The asynchronous motor comprises a frequency converter motor 10 and in the drive assembly between the motor shaft and the gear mechanism 4 a two-gear toothed wheel gear mechanism is arranged as a forward gear mechanism, with a starting gear position and a normal gear position, with which in the starting gear position the breakaway effect required for starting the loaded chain scraper conveyor or for releasing the plough can be attained.
摘要:
A toggle retainer (10) for toggle connections of conveyor pans (5) for chain scraper conveyors, guide troughs of mining machines and similar, with a locking plate (30) engaging across the locking extension (23, 24) on the toggle head (21, 22) of a toggle (20) and securing the toggle (20) in the toggle accepting pocket (9) against falling out to the side, both ends (31, 32) of which can be introduced into an insertion pocket (11, 12) in the toggle acceptor (1) and which for retention in the locking cut-outs (13, 14) of the toggle acceptor (1) have at least one aperture (37) into which the shaft (41) of a locking element (40) engaging in one of the locking cut-outs (13, 14) can be inserted. The locking plate (30) is provided with transverse borings (38, 39), one of which opens into the aperture (37) and in which a securing clamp (50) engagement can be inserted or is inserted retaining the shaft (41) by positive.
摘要:
A drive and tensioning station (10) of a chain scraper conveyor for mining operations with a machine frame base (20) having side cheeks (21) and a conveyor base (22), connected to a line of pans of the chain scraper conveyor, with a tensioning frame head (50) which can be moved in the direction of the line of pans, in whose side cheek plates (51) can be mounted the chain drum (3) for the scraper chain, and with a tensioning drive having at least one tensioning cylinder (6) to move the tensioning frame head (50) relative to the machine frame base (20). The tensioning frame head (50) has a box-like drawer (60) extending out over the side cheek plates (51) toward the pan connecting side, which is guided in a type of drawer guide (26) on the machine frame base (20) and that on the tensioning frame head (50) a top run pan (70) forming a drag plate in the top run (4) and/or a bottom run box (40) forming a drag base in the bottom run are removably fastened.
摘要:
A guide arrangement for a drum-type cutting machine is composed of a guide block cooperating with a guide rail and articulated at the lower end of a vertical guide arm of the cutting machine. The guide block has a pocket defined by lateral walls which receives the guide arm. A transverse bolt extends through the pocket in the guide block and is received snugly by a bore in the guide arm. One of the end regions of the bolt forms a pivot journal head with curved surfaces which is received in a pivot journal socket in one of the lateral walls of the pocket in the guide block. The other end of the transverse bolt fits with lateral play in a horizontal guide of the other lateral wall of the guide block. The inner surfaces of the lateral walls incline relative to a horizontal plane to permit the guide arm to cant about a vertical axis.
摘要:
A process for the preparation of water-dilutable polyvinylbutyral dispersions by (1) reacting an aliphatic acid having from one to three isocyanate-reactive groups and from one to three acid groups, or a mixture of such acids, with one or more polyfunctional isocyanates whose average functionality is at least two, where the quantity of the isocyanate component is chosen such that the ratio of the number of isocyanate groups to the number of isocyanate-reactive groups of the acid component is between 2.2:1 and 1.7:1; (2) then reacting from 25 to 75% of the remaining isocyanate groups with at least one monofunctional compound selected from monoalcohols and monoamines; and (3) reacting this NCO-functional emulsifier resin further with polyvinylbutyral and, if desired, with an appropriate plasticizer resin using a suitable auxiliary solvent. The polyvinylbutyral dispersions prepared in this way can be used as binders and binder components for coatings with good adhesion.
摘要:
The guide shoe arrangement for disk shearers having a pin wheel gear drive and a coupling sleeve into which engages from above a coupling piece disposed on a positioning arm of the disk shearer, to which a guide shoe is pivotably connected by a gudgeon traversing the coupling sleeve. The height of the guide shoe is considerably less than its length. At the one sidewall of the guide shoe, a guide lug that is preferably formed as a hooked cleat is fixedly disposed. With the guide shoe arrangement it is possible to place the center of gravity of the guide show very low, such as about the guide plane of the guide shoe.