Bucket-wheel stacker reclaimer
Technical field
The present invention relates to bulk stockpile and get technology, be specifically related to a kind of bucket-wheel stacker reclaimer.
Background technology
Bucket-wheel stacker reclaimer is the common equipment that in modernization industry, large loose unpacked material loads and unloads continuously, there is high operating efficiency, be widely used in bulk cargo (such as mine, coal, coke, the sandstone) stacking and taking operation of the occasions such as harbour, harbour, metallurgy, cement steel plant, coke-oven plant, coal storage plant, power plant.
Usually, bucket-wheel stacker reclaimer comprises large mechanism of car, bucket wheel, turn table, front jib and turn table, and turn table is arranged on large mechanism of car rotationally, and one end of front jib is hinged on turn table, and the other end is connected with bucket wheel; Pitching is realized for making front jib, also be provided with pitching oil cylinder between turn table and front jib, one end and the front jib of pitching oil cylinder are hinged, and the other end and the turn table of pitching oil cylinder are hinged, be that front jib swings up and down by the flexible of pitching oil cylinder, and then drive bucket wheel motion.
On existing bucket-wheel stacker reclaimer, pitching oil cylinder is very important parts, in some cases (such as maintenance or more exchange device), front jib is needed to maintain end position (under normal circumstances, front jib bend down or steeve maximum angle time residing position), now, pitching oil cylinder must play failure-free support or pull effect; And in practice, the leakage of oil of pitching oil cylinder, hydraulic circuit leakage of oil or blow, the stressed of front jib occur that the problems such as great sudden change are all inevitable, once there is these problems, front jib may drop suddenly under gravity or on turn over, and then cause safety misadventure.
Therefore, how to promote the safety of bucket-wheel stacker reclaimer, be still the technical matters that those skilled in the art are urgently to be resolved hurrily.
Summary of the invention
In view of this, the object of the invention is to propose a kind of safer bucket-wheel stacker reclaimer.
The present invention proposes a kind of bucket-wheel stacker reclaimer, be provided with turn table, front jib and pitching oil cylinder, one end and the turn table of described pitching oil cylinder are hinged, the other end and front jib hinged; Be provided with self-locking mechanism between described front jib and turn table, described self-locking mechanism continues to steeve at upper extreme position for stoping front jib jib before lower limit position continues to bend down and stops.
Further, described self-locking mechanism comprises crank and connecting rod, and one end and the front jib of described connecting rod are hinged, and the first end of the other end and crank is hinged, the second end of described crank and turn table hinged; When described forearm chord position is in upper extreme position or lower limit position, the line of centers of described crank overlaps with the line of centers of connecting rod.
Further, described self-locking mechanism comprises connecting rod, slide block, the first block and the second block, one end and the slide block of described connecting rod are hinged, the other end and turn table hinged, described front jib is provided with the slide rail of predetermined length, described first block and the second block are arranged at the two ends of described slide rail respectively; Described slide block is arranged on described slide rail and also can slides along described slide rail, when described forearm chord position is in upper extreme position, described slide block is resisted against on described second block, and when described forearm chord position is in lower limit position, described slide block is resisted against on described first block.
Further, described self-locking mechanism comprises expansion link, and described expansion link is provided with can the interior bar of relative sliding and outer bar; One end and the front jib of described interior bar are hinged, the other end and outer bar sheathed, described outer bar away from one end of described interior bar and turn table hinged; When described front jib is in upper extreme position, described expansion link is in most long status, and when described front jib is in lower limit position, described expansion link is in most short status.
Further, described slide block is provided with pin-and-hole, described first block and the second block are provided with the lock pin coordinated with described pin-and-hole.
Further, described forearm chord position when upper extreme position, the angle degree of being less than of front jib and horizontal direction.
Further, described forearm chord position when lower limit position, the angle degree of being less than of front jib and horizontal direction.
Further, described forearm chord position when upper extreme position, the angle degree of being of front jib and horizontal direction; Described forearm chord position when lower limit position, the angle degree of being of front jib and horizontal direction.
This bucket-wheel stacker reclaimer is provided with self-locking mechanism, when upper extreme position, self-locking mechanism can stop front jib to continue to steeve and then prevent front jib from excessively steeving and cause upset, when lower limit position, self-locking mechanism can stop front jib to continue to bend down and then prevent front jib from excessively bending down and cause upset.Therefore, compared with prior art, the safety of this bucket-wheel stacker reclaimer is higher.
In technical scheme further, this self-locking mechanism is provided with crank and connecting rod, and one end and the front jib of described connecting rod are hinged, and the first end of the other end and crank is hinged, the second end of described crank and turn table hinged, and then form piston crank mechanism; Described forearm chord position in upper extreme position or lower limit position time, the line of centers of described crank overlaps with the line of centers of connecting rod, piston crank mechanism is made to be in the dead point of transmission, crank cannot rotate, and then limit the motion of connecting rod, under the position-limiting action of crank and connecting rod, front jib is fixed on upper extreme position or lower limit position.In this way, when maintenance or replacing parts, forearm can be placed on upper extreme position or lower limit position, now, even if there is the leakage of oil of pitching oil cylinder, hydraulic circuit leakage of oil or blow, there is the problems such as great sudden change in the stressed of front jib, front jib also can not drop or on turn over; When in operation process, occur front jib drop suddenly or on turn over problem time, current arm support moves to upper extreme position or lower limit position, and self-locking mechanism can play a protective role, thus prevents the generation of safety misadventure or alleviate the impact of safety misadventure.
In technical scheme further, described self-locking mechanism comprises connecting rod, slide block, the first block and the second block, one end and the slide block of described connecting rod are hinged, the other end and turn table hinged, described front jib is provided with the slide rail of predetermined length, described first block and the second block are arranged at the two ends of described slide rail respectively; Described slide block is arranged on described slide rail and also can slides along described slide rail, described slide block is provided with pin-and-hole, described first block and the second block are provided with the lock pin coordinated with described pin-and-hole, when described forearm chord position is in upper extreme position, described slide block is resisted against on described second block, and the lock pin on the second block inserts in pin-and-hole, correspondingly, front jib is locked by self-locking mechanism, cannot continue action; When described forearm chord position is in lower limit position, described slide block is resisted against on described first block, and the lock pin on the first block inserts in pin-and-hole, and correspondingly, front jib is locked by self-locking mechanism, cannot continue action.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the bucket-wheel stacker reclaimer of first embodiment of the invention;
Fig. 2 is the partial enlarged drawing of part A in Fig. 1, and now, jib is horizontal;
Fig. 3 be part shown in Fig. 2 forearm chord position in upper extreme position time schematic diagram;
Fig. 4 be part shown in Fig. 2 forearm chord position in lower limit position time schematic diagram;
Fig. 5 is the partial schematic diagram of the bucket-wheel stacker reclaimer of second embodiment of the invention, and this bucket-wheel stacker reclaimer is provided with the self-locking mechanism of another kind of structure.
Description of reference numerals:
1-front jib 2-bucket wheel, 3-turn table, 4-large mechanism of car 5-pitching oil cylinder
6-crank, 7-connecting rod 8-the first block, 9-slide block 10-the second block
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.Be described in detail below in conjunction with accompanying drawing 1 to 5 pair of specific embodiments of the invention.
As depicted in figs. 1 and 2, the bucket-wheel stacker reclaimer that first embodiment of the invention proposes comprises large mechanism of car 4, bucket wheel 2, turn table 3, front jib 1, rear jib, pitching oil cylinder 5, trolley body (not shown) and self-locking mechanism, this self-locking mechanism comprises connecting rod 7 and crank 6, turn table 3 is arranged on large mechanism of car 4 rotationally, one end of front jib 1 is hinged on turn table 3, and the other end is connected with bucket wheel 2; One end and the front jib 1 of pitching oil cylinder 5 are hinged, and the other end and the turn table 3 of pitching oil cylinder 5 are hinged, are that front jib 1 swings up and down by the flexible of pitching oil cylinder 5, and then drive bucket wheel 2 to move; One end and the front jib 1 of connecting rod 7 are hinged, and the first end of the other end and crank 6 is hinged, and the second end and the turn table 3 of crank 6 are hinged; As shown in Figure 3 and Figure 4, when front jib 1 is positioned at upper extreme position or lower limit position, the line of centers of crank 6 overlaps with the line of centers of connecting rod 7.
Above-mentioned self-locking mechanism is provided with crank 6 and connecting rod 7, and one end and the front jib 1 of connecting rod 7 are hinged, and the first end of the other end and crank 6 is hinged, and the second end and the turn table 3 of crank 6 are hinged, and then forms crank 6 connecting rod 7 mechanism; When front jib 1 is positioned at upper extreme position or lower limit position, the line of centers of crank 6 overlaps with the line of centers of connecting rod 7, crank 6 connecting rod 7 mechanism is made to be in the dead point of transmission, crank 6 cannot rotate, and then limit the motion of connecting rod 7, under the position-limiting action of crank 6 and connecting rod 7, front jib 1 is fixed on upper extreme position or lower limit position.When keeping in repair or change parts, front jib 1 can be placed in upper extreme position or lower limit position, now, though there is pitching oil cylinder 5 leakage of oil, hydraulic circuit leakage of oil or blow, there is the problems such as great sudden change in the stressed of front jib 1, front jib 1 also can not drop or on turn over; When in operation process, occur the suddenly tenesmus of front jib 1 or on turn over problem time, current arm support 1 moves to upper extreme position or lower limit position, and self-locking mechanism can play a protective role, thus prevents the generation of safety misadventure or alleviate the impact of safety misadventure.
As shown in Figure 5, self-locking mechanism on the bucket-wheel stacker reclaimer that the second embodiment of the present invention proposes is provided with connecting rod 7, first block 8, slide block 9 and the second block 10, one end and the slide block 9 of connecting rod 7 are hinged, the other end and turn table 3 hinged, front jib 1 is provided with the slide rail of predetermined length, first block 8 and the second block 10 are arranged at the two ends of slide rail, and slide block 9 is arranged on slide rail slidably; When front jib 1 is positioned at upper extreme position, slide block 9 is resisted against on the second block 10; When front jib 1 is positioned at lower limit position, slide block 9 is resisted against on the first block 8; With the first embodiment unlike, in this embodiment, this self-locking mechanism can not limit front jib completely at upper extreme position or lower limit position, can only limit front jib at rational range of motion.
Certainly, front jib can be locked by locking structure, such as lock pin is set on the first block 8 and the second block 10, slide block 9 arranges pin-and-hole, when slide block 9 is against when living the first block 8 or the second block 10, lock pin inserts in pin-and-hole, and then by the locking position of front jib.
In preferably embodiment, at upper extreme position, the front jib 1 of this bucket-wheel stacker reclaimer is 13 degree with the angle of horizontal direction; When lower limit position, front jib 1 is 14 degree with the angle of horizontal direction; By limiting the angle of front jib 1, the setting of self-locking mechanism can be facilitated, and guarantee when upper extreme position or lower limit position, self-locking mechanism stressed not too large.
In addition, in other embodiments, self-locking mechanism comprises expansion link, and particularly, expansion link is provided with can the interior bar of relative sliding and outer bar; One end and the front jib 1 of interior bar are hinged, the other end and outer bar sheathed, outer bar away from one end of interior bar and turn table 3 hinged; When current arm support 1 is steeved, expansion link extends, and when front jib 1 is in upper extreme position, expansion link is in most long status, and when current arm support 1 bends down, expansion link shortens, and when front jib 1 is in lower limit position, expansion link is in most short status.
Compared with prior art, above-mentioned bucket-wheel stacker reclaimer can promote safety effectively by arranging above-mentioned self-locking mechanism.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.