A crawler mobile head station of a belt conveyor for an open pit mine

Abstract

A crawler mobile head station of a belt conveyor for an open-pit mine belongs to the technical field of continuous conveying of bulk materials. The crawler mobile head station is designed with a double-layer truss structure, which comprises a truss upper chord, a truss main beam and a truss lower chord arranged in sequence from top to bottom. The truss main beam is kept horizontal, and the tail end lower chord is located below the truss main beam and higher than the truss lower chord. The truss upper chord and the truss main beam, the truss main beam and the truss lower chord, and the truss main beam and the tail end lower chord are connected by vertical rods respectively. This structure solves the problem of low rigidity caused by the small truss height of the cantilevered discharge end of the truss head due to the influence of the crawler support, and effectively improves the local rigidity of the head end of the truss and the overall rigidity of the truss. The head roller is installed on the vertical rod between the truss upper chord and the truss main beam, the unloading height is improved, and it is easier to realize the transfer to the downstream belt conveyor, and at the same time, the unreasonable problem of the existing technology using a polyline truss structure is solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of continuous conveying of bulk materials, and particularly relates to a caterpillar mobile head station of a belt conveyor for open-pit mines. BACKGROUND

[0002] Compared with the intermittent production process of single-bucket trucks in open-pit mines, the wheel-and-bucket continuous and self-moving breaker semi-continuous mining process system has the remarkable advantages of continuous operation, high work efficiency and low production cost. The working face equipment of the wheel-and-bucket continuous and self-moving breaker semi-continuous mining process system needs to be regularly moved and arranged. The wheel-and-bucket excavator, single-bucket excavator, self-moving breaker and rehandler and other working face equipment are provided with walking mechanisms, and can be moved at a high speed, which can be completed within one day. The belt conveyor of the working face is generally movable and does not have a walking mechanism, and it takes a long time to move and arrange, about 7-15 days, which causes the wheel-and-bucket continuous and self-moving breaker semi-continuous mining process system to stop production for 7-15 days, seriously affecting the production continuity and capacity stability of the open-pit mine, and also limiting the application of the wheel-and-bucket continuous and self-moving breaker semi-continuous mining process system in the coal mining system of the open-pit mine.

[0003] The caterpillar transverse belt conveyor of the open-pit mine is an effective equipment for solving the problem of slow movement of the belt conveyor of the working face. The belt conveyor is installed on a continuous truss capable of caterpillar walking, which improves the movement efficiency of the belt conveyor of the working face. The head station of the existing caterpillar transverse belt conveyor of the open-pit mine adopts a truss structure with a lower truss, and the upper chord of the truss is used as the main beam, and the entire truss body is below the main beam. In order to meet the rehandling needs of the downstream belt conveyor, the head truss adopts a cantilever type structure, and the cantilever unloading end often needs to be raised to meet the rehandling height requirements, so the truss often forms a broken line. Under normal circumstances, the broken line truss is difficult to process, and the truss structure is not reasonable. SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a caterpillar mobile head station of a belt conveyor for open-pit mines, which solves the problems of low height and small stiffness of the head end truss, insufficient stiffness of the truss at the unloading hopper, large tension of the head conveyor belt, complex stress of the truss, and unreasonable structure of the truss caused by large rehandling height.

[0005] The technical scheme adopted by the present application is as follows: a caterpillar mobile head station of a belt conveyor for open-pit mines, which comprises a truss, a main caterpillar, a secondary caterpillar, a main supporting structure, a secondary supporting structure and a conveyor head; the truss is a horizontal structure, the lower end of the truss head of the truss is connected to the main caterpillar through the main supporting structure, the tail of the truss is connected to the secondary caterpillar through the secondary supporting structure, and the truss is provided with the conveyor head.

[0006] Preferably, the truss comprises a truss top chord, a truss girder, a truss bottom chord and a tail end bottom chord, the truss top chord, the truss girder and the truss bottom chord are arranged in sequence from top to bottom, the truss girder is kept horizontal and connected with the tail end bottom chord arranged horizontally, the tail end bottom chord is located below the truss girder and higher than the truss bottom chord; the truss top chord and the truss girder, the truss girder and the truss bottom chord, and the truss girder and the tail end bottom chord are connected by vertical rods respectively.

[0007] Preferably, the two ends of the truss top chord are further fixed with the truss girder by diagonal supports; one end of the truss bottom chord is connected with the truss girder by a diagonal support, and the other end of the truss bottom chord is connected with the tail end bottom chord by a diagonal support.

[0008] Preferably, the truss girder is arranged along the whole length of the truss; the length of the truss top chord is shorter than that of the truss girder, and the truss top chord is arranged only at the head of the truss; the length of the tail end bottom chord is the shortest, and the tail end bottom chord is arranged only at the tail of the truss; the length of the truss bottom chord is shorter than that of the truss girder, and the truss bottom chord is arranged in the middle of the truss, partially overlaps with the truss top chord in the vertical direction near the head end, and connects with the tail end truss near the tail end.

[0009] The open-pit belt conveyor track mobile head station has the following advantages: the double-layer truss structure is designed, the truss comprises a truss top chord, a truss girder and a truss bottom chord arranged in sequence from top to bottom, the truss girder is kept horizontal, and a tail end bottom chord is located below the truss girder and higher than the truss bottom chord; the truss top chord and the truss girder, the truss girder and the truss bottom chord, and the truss girder and the tail end bottom chord are connected by vertical rods respectively. The structure solves the problems of the influence of the track support, the small height of the truss at the cantilever unloading end of the truss head, and the low rigidity at the cantilever end, and effectively improves the local rigidity of the head end of the truss and the overall rigidity of the truss; the head roller is installed on the vertical rod between the truss top chord and the truss girder, the unloading height is improved, the transfer to the downstream belt conveyor is more easily realized, and the unreasonable problem of the existing technology using a broken line-shaped truss structure is solved. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0011] Fig. 1 is a structure schematic diagram of a track mobile head station of an embodiment of the present application;

[0012] Fig. 2 is a truss structure schematic diagram of an embodiment of the present application;

[0013] Fig. 3is a use state diagram of the conveyor of the embodiment of the present application;

[0014] The figure sequence is explained as follows: 1 truss, 11 upper chord of truss, 12 main beam of truss, 13 lower chord of truss, 14 vertical rod, 15 hinged point, 16 tail end lower chord, 2 main track, 3 auxiliary track, 4 main supporting structure, 5 auxiliary supporting structure, 6 conveyor head, 61 head roller, 62 guide roller one, 63 guide roller two, 64 guide roller three. DETAILED DESCRIPTION

[0015] The above objects, features and advantages of the present application will become more apparent from the following detailed description made in conjunction with the accompanying drawings, in which: Figs. 1-3 The present application is further described in detail below with reference to the accompanying drawings.

[0016] The track mobile head station described in the embodiment comprises a truss 1, a main track 2, an auxiliary track 3, a main supporting structure 4, an auxiliary supporting structure 5 and a conveyor head 6. The head lower end of the truss 1 is connected to the main track 2 through the main supporting structure 4, the tail of the truss 1 is connected to the auxiliary track 3 through the auxiliary supporting structure 5, and the conveyor head 6 is installed inside the truss 1.

[0017] The truss 1 of the embodiment adopts a double-layer composite structure, comprising an upper chord 11 of truss, a main beam 12 of truss, a lower chord 13 of truss and a tail end lower chord 16. The upper chord 11 of truss, the main beam 12 of truss and the lower chord 13 of truss are arranged in sequence from top to bottom, and the tail end lower chord 16 is located below the main beam 12 of truss and slightly higher than the lower chord 13 of truss. The upper chord 11 of truss, the main beam 12 of truss and the vertical rod connecting them constitute an upper layer truss. The height of the upper layer truss can be adjusted according to the distance between the upper chord 11 of truss and the main beam 12 of truss, so as to ensure the rigidity of the cantilever end of the head of the truss 1. The main beam 12 of truss is arranged along the full length of the truss 1. The length of the upper chord 11 of truss is shorter than that of the main beam 12 of truss, and the upper chord 11 of truss is arranged only at the head of the truss 1. The length of the tail end lower chord 16 is the shortest, and the tail end lower chord 16 is arranged only at the tail of the truss 1. The length of the lower chord 13 of truss is shorter than that of the main beam 12 of truss, and the lower chord 13 of truss is arranged in the middle of the truss 1, partially overlaps with the upper chord 11 of truss in the vertical direction near the head end, and connects with the tail end lower chord 16 near the tail end. The overlapping parts of the upper chord 11 of truss, the main beam 12 of truss and the lower chord 13 of truss form a double-layer truss structure, which avoids the problem of unreasonable truss structure caused by the folding point of the existing technology adopting a broken line truss. The upper chord 11 of truss and the main beam 12 of truss, the main beam 12 of truss and the lower chord 13 of truss, and the main beam 12 of truss and the tail end lower chord 16 are connected by vertical rods respectively. The two ends of the upper chord 11 of truss are also fixed with the main beam 12 of truss through inclined supports. One end of the lower chord 13 of truss is connected with the main beam 12 of truss through an inclined support, and the other end of the lower chord 13 of truss is connected with the tail end lower chord 16 through an inclined support.

[0018] The front end of the truss girder 12 in this embodiment is wide, and narrows near the vertical post connecting the truss girder 12 and the truss lower chord 13. The connecting vertical post between the truss upper chord 11 and the truss girder 12 is collinear or approximately collinear with the connecting vertical post 14 between the truss girder 12 and the truss lower chord 13 at the same position. The height of the truss girder 12 in this embodiment remains unchanged, and the truss lower chord 13 is raised. The front end of the truss girder 12 is connected to the main support structure through a hinge point 15, and the lower surface of the tail end lower chord 16 is in sliding fit with the auxiliary support structure 5.

[0019] The conveyor head 6 is installed inside the truss 1, and the load section of the conveyor head 6 is installed as follows: the inner space enclosed by the truss upper chord 11 (one in front and one in back) and the truss girder 12 (one in front and one in back) is fixed with the middle frame of the belt conveyor, the middle frame 12 is installed with a roller frame, and the roller frame is installed with a conveyor belt. The return section of the conveyor head 6 is installed as follows: the head drum 61 is installed on the vertical post between the truss upper chord 11 and the truss girder 12, the height of the head drum 61 is higher than that of the existing scheme, and the height of the head drum 61 can be further adjusted on the vertical post 14 according to the requirements of the transfer, which is more conducive to transferring materials to the downstream belt conveyor. The redirection drum 62 is installed on the truss girder 12 (or the vertical post between the truss upper chord 11 and the truss girder 12), and the conveyor belt passes through the head drum 61 and the redirection drum 62 before entering the return section, and the conveyor belt is located above the truss girder 12. The redirection drum 63, the redirection drum 64, and the tensioning drum 65 are respectively connected on the vertical post 14 in the area formed by the truss girder 12 (one in front and one in back) and the truss lower chord 13 (one in front and one in back). The redirection drum 62 guides the return section conveyor belt to below the truss girder 12, the conveyor belt guided by the redirection drum 63 is directed horizontally to enter the tensioning drum 65, the conveyor belt horizontally winds from below the tensioning drum 65 and horizontally winds from above the tensioning drum 65, and the redirection drum 64 is horizontally wound above the redirection drum 64, the upper surface of the redirection drum 64 is at the same height as the theoretical center line of the return conveyor belt, the conveyor belt enters the normal return section, and the normal return section roller and the conveyor belt are installed below the truss girder 12.

[0020] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A tracked mobile head station for an open-pit mine belt conveyor, characterized in that, It includes a truss (1), main track (2), auxiliary track (3), main support structure (4), auxiliary support structure (5) and conveyor head (6); the truss (1) is a horizontal structure, the lower end of the head of the truss (1) is connected to the main track (2) through the main support structure (4), the tail of the truss (1) is connected to the auxiliary track (3) through the auxiliary support structure (5), and the conveyor head (6) is installed on the truss (1); The truss (1) includes an upper chord (11), a main beam (12), a lower chord (13), and a tail lower chord (16). The upper chord (11), the main beam (12), and the lower chord (13) are arranged sequentially from top to bottom. The main beam (12) is horizontal and connected to the horizontally arranged tail lower chord (16). The tail lower chord (16) is located below the main beam (12) and above the lower chord (13). The upper chord (11) and the main beam (12), the main beam (12) and the lower chord (13), and the main beam (12) and the tail lower chord (16) are respectively connected by vertical members. The upper chord (11), the main beam (12), and the connecting vertical members between them constitute the upper truss. The height of the upper truss is adjusted according to the distance between the upper chord (11) and the main beam (12). A machine head roller (61) is installed on the vertical rod located between the upper chord (11) of the truss and the main beam (12) of the truss. The height of the machine head roller (61) is further adjusted on the vertical rod according to the transfer requirements.

2. The tracked mobile head station of the open-pit mine belt conveyor according to claim 1, characterized in that, The two ends of the upper chord (11) of the truss are also fixed to the main beam (12) of the truss by diagonal bracing; one end of the lower chord (13) of the truss is connected to the main beam (12) of the truss by diagonal bracing, and the other end of the lower chord (13) of the truss is connected to the tail end lower chord (16) by diagonal bracing.

3. The tracked mobile head station of the open-pit mine belt conveyor according to claim 1 or 2, characterized in that, The main beam (12) of the truss is set along the entire length of the truss (1); the upper chord (11) of the truss is shorter than the main beam (12) of the truss, and the upper chord (11) of the truss is only set at the head of the truss (1); the lower chord (16) of the tail end is the shortest and is only set at the tail of the truss (1); the lower chord (13) of the truss is shorter than the main beam (12) of the truss, and is set in the middle of the truss (1), and partially overlaps with the upper chord (11) of the truss in the vertical direction near the head end, and connects with the lower chord (16) of the tail end near the tail end.

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