Crawler belt moving type machine head station of belt conveyor for strip mine

Abstract

The invention discloses a crawler belt moving type machine head station of a belt conveyor for a strip mine, and belongs to the technical field of bulk material continuous conveying. According to the crawler belt moving type machine head station, a double-layer truss structure is designed, a truss comprises a truss upper chord, a truss main beam and a truss lower chord which are sequentially arranged from top to bottom, the truss main beam is kept horizontal, and a 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 through vertical rods respectively. The structure solves the problem that rigidity is low due to the fact that the height of a truss at the discharging end of a truss head cantilever is small under the influence of track supporting, and the local rigidity of the head end of the truss and the overall rigidity of the truss are effectively improved; the machine head roller is installed on the vertical rod between the truss upper chord and the truss main beam, the unloading height is increased, transshipment towards a downstream belt conveyor is easier to achieve, and meanwhile the problem that in the prior art, a broken-line-shaped truss structure is unreasonable is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of continuous conveying of bulk materials, and in particular relates to a crawler-type mobile head station of a belt conveyor for open-pit mines. Background Art

[0002] Compared with the intermittent production process of single bucket trucks in open pit mines, the open pit wheel bucket continuous and self-moving crusher semi-continuous mining process system has the significant advantages of continuous operation, high work efficiency and low production cost. The working face equipment of the open pit wheel bucket continuous and self-moving crusher semi-continuous mining process system needs to be relocated regularly. The working face equipment such as bucket wheel excavators, single bucket excavators, self-moving crushers, and transfer machines have their own walking mechanisms and fast moving speeds, and can be relocated within 1 day. However, the working face belt conveyor is generally a relocation type, without its own walking mechanism, and the relocation takes a long time, about 7 to 15 days, resulting in the wheel bucket continuous and self-moving crusher semi-continuous mining process system also shutting down for 7 to 15 days, which seriously affects the production continuity and production capacity stability of the open pit mine, and also limits the application of the wheel bucket continuous and self-moving crusher semi-continuous mining process system in the open pit coal mining system.

[0003] The crawler transverse belt conveyor for open-pit mines is an effective equipment to solve the problem of slow relocation of belt conveyors on the working face. The belt conveyor is installed on a continuous truss that can travel on crawlers, which improves the relocation efficiency of the belt conveyor on the working face. The truss structure used in the head station of the existing open-pit crawler transverse belt conveyor is a downturned truss, with the upper chord of the truss as the main beam, and the entire truss body is below the main beam. In order to meet the needs of transferring to the downstream belt conveyor, the head truss adopts a cantilever structure, and in order to meet the transfer height requirements, the cantilever unloading end often needs to be raised, so the truss often forms a broken line shape. Generally speaking, broken line trusses are difficult to process, and the truss structure is not entirely reasonable. Summary of the invention

[0004] In view of the above shortcomings, the purpose of the present invention is to provide a crawler mobile head station for an open-pit mine belt conveyor, which solves the problems of low height and low rigidity of the truss at the head end, insufficient cantilever rigidity of the truss at the unloading funnel, high tension of the head conveyor belt and complex force of the truss, and unreasonable structure of the truss due to high transfer height.

[0005] The technical solution adopted by the invention is: a crawler mobile head station for an open-pit mine belt conveyor, the technical key points of which are that it includes a truss, a main crawler, an auxiliary crawler, a main supporting structure, an auxiliary supporting structure and a conveyor head; the truss is a horizontal structure, the lower end of the truss head is connected to the main crawler through the main supporting structure, the tail of the truss is connected to the auxiliary crawler through the auxiliary supporting structure, and the conveyor head is installed on the truss.

[0006] Preferably, the truss includes a truss upper chord, a truss main beam, a truss lower chord and a tail end lower chord, the truss upper chord, the truss main beam and the truss lower chord are arranged in sequence from top to bottom, the truss main beam is kept horizontal and connected to the horizontally arranged tail end lower chord, 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 respectively by vertical rods.

[0007] Preferably, both ends of the truss upper chord are also fixed to the truss main beam through oblique supports; one end of the truss lower chord is connected to the truss main beam through an oblique support, and the other end of the truss lower chord is connected to the tail end lower chord through an oblique support.

[0008] Preferably, the truss main beam is arranged along the entire length of the truss; the length of the truss upper chord is shorter than that of the truss main beam, and the truss upper chord is only arranged at the head of the truss; the length of the tail end lower chord is the shortest, and is only arranged at the tail of the truss; the length of the truss lower chord is shorter than that of the truss main beam, and is arranged in the middle of the truss, partially overlapping with the truss upper chord in the vertical direction near the nose end, and connecting with the tail end truss near the tail end.

[0009] The beneficial effects of the present invention are as follows: the crawler mobile head station of the open-pit mine belt conveyor is designed with a double-layer truss structure, the truss includes a truss upper chord, a truss main beam, and a truss lower chord arranged in sequence from top to bottom, the truss main beam remains 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 the small truss height and low rigidity of the cantilever end of the truss head cantilever unloading end affected by the crawler support, and the local rigidity of the head end of the truss and the overall rigidity of the truss are effectively improved; the head roller is installed on the vertical rod between the truss upper chord and the truss main beam, the unloading height is increased, and it is easier to transfer to the downstream belt conveyor, and at the same time solves the unreasonable problem of the broken line truss structure used in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 2 is a schematic diagram of the structure of a crawler-type mobile head station according to an embodiment of the present invention; Figure 2 is a schematic diagram of a truss structure according to an embodiment of the present invention; Figure 3 is a diagram of the use state of the conveyor according to an embodiment of the present invention; The serial numbers in the figure are explained as follows: 1 truss, 11 truss upper chord, 12 truss main beam, 13 truss lower chord, 14 vertical rod, 15 hinge point, 16 tail end lower chord, 2 main crawler, 3 auxiliary crawler, 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

[0012] To make the above-mentioned objects, features and advantages of the present invention more obvious, the following is a brief description of the present invention in conjunction with the attached Figure 1-Figure 3 The present invention is further described in detail with specific implementation modes.

[0013] The crawler mobile head station described in this embodiment includes a truss 1, a main crawler 2, an auxiliary crawler 3, a main supporting structure 4, an auxiliary supporting structure 5, and a conveyor head 6. The lower end of the head of the truss 1 is connected to the main crawler 2 through the main supporting structure 4, the tail of the truss 1 is connected to the auxiliary crawler 3 through the auxiliary supporting structure 5, and the conveyor head 6 is installed inside the truss 1.

[0014] The truss 1 of this embodiment adopts a double-layer composite structure, including a truss upper chord 11, a truss main beam 12, a truss lower chord 13 and a tail lower chord 16. The truss upper chord 11, the truss main beam 12 and the truss lower chord 13 are arranged in sequence from top to bottom, and the tail lower chord 16 is located below the truss main beam 12 and slightly higher than the truss lower chord 13. The truss upper chord 11, the truss main beam 12 and the connecting vertical rods therebetween constitute an upper truss, and the height of the upper truss can be adjusted according to the distance between the truss upper chord 11 and the truss main beam 12 to ensure the rigidity of the cantilever end of the head of the truss 1. The truss main beam 12 is arranged along the entire length of the truss 1; the length of the truss upper chord 11 is shorter than that of the truss main beam 12, and the truss upper chord 11 is only arranged at the head of the truss 1; the length of the tail end lower chord 16 is the shortest, and it is only arranged at the tail end of the truss 1; the length of the truss lower chord 13 is shorter than that of the truss main beam 12, and it is arranged in the middle of the truss 1, and it partially overlaps with the truss upper chord 11 in the vertical direction near the nose end, and it is connected with the tail end truss 16 near the tail end. The overlapping parts of the truss upper chord 11, the truss main beam 12 and the truss lower chord 13 form a double-layer truss structure, avoiding the problem of unreasonable truss structure caused by the use of broken line trusses to form inflection points in the prior art. The truss upper chord 11 and the truss main beam 12, the truss main beam 12 and the truss lower chord 13, and the truss main beam 12 and the tail end lower chord 16 are connected by vertical rods respectively. The two ends of the truss upper chord 11 are also fixed to the truss main beam 12 by diagonal supports. One end of the truss lower chord 13 is connected to the truss main beam 12 through an oblique support, and the other end of the truss lower chord 13 is connected to the tail end lower chord 16 through an oblique support.

[0015] The front end of the truss main beam 12 in this embodiment is wide, and it shrinks and narrows near the vertical rod connecting the truss main beam 12 and the truss lower chord 13. The connecting vertical rod between the truss upper chord 11 and the truss main beam 12 is collinear or approximately collinear with the connecting vertical rod 14 between the truss main beam 12 and the truss lower chord 13 at the same position. The height of the truss main beam 12 in this embodiment remains unchanged, and the truss lower chord 13 is raised. The front end of the truss main beam 12 is connected to the main support structure through the hinge point 15, and the lower surface of the tail end lower chord 16 is slidably matched with the auxiliary support structure 5.

[0016] The conveyor head 6 is installed inside the truss 1. The bearing section of the conveyor head 6 is installed as follows: the middle frame of the belt conveyor is fixed in the inner space surrounded by the truss upper chord 11 (one each at the front and rear) and the truss main beam 12 (one each at the front and rear), the roller frame is installed on the middle frame 12, and the conveyor belt is installed on the roller frame; the return section of the conveyor head 6 is installed as follows: the head roller 61 is installed on the vertical rod between the truss upper chord 11 and the truss main beam 12. The height of the head roller 61 is higher than that of the existing solution. At the same time, the height of the head roller 61 can be further increased on the vertical rod 14 according to the transfer requirements, which is more conducive to transferring materials to the downstream belt conveyor. The redirection roller 1 62 is installed on the truss main beam 12 (or the vertical rod between the truss upper chord 11 and the truss main beam 12). Before the conveyor belt passes through the head roller 61 and the redirection roller 1 62 and enters the return section, the conveyor belt is located above the truss main beam 12. Redirecting roller two 63, redirecting roller three 64 and tensioning roller 65 are respectively connected to the vertical rods 14 in the area formed by the truss main beam 12 (one each at the front and rear) and the truss lower chord 13 (one each at the front and rear). Redirecting roller one 62 guides the return section conveyor belt to the bottom of the truss main beam 12, and the conveyor belt passing through redirecting roller two 63 is guided into a horizontal direction so as to enter the tensioning roller 65. The conveyor belt enters horizontally from the bottom of the tensioning roller 65, and exits horizontally from the top of the tensioning roller 65, and then enters from the bottom of redirecting roller three 64 and exits horizontally from the top. The upper surface of redirecting roller three 64 is at the same height as the theoretical center line of the return conveyor belt, and the conveyor belt enters the normal return section. The normal return section rollers and conveyor belts are installed below the truss main beam 12.

[0017] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A crawler mobile head station, characterized in that: The invention comprises a truss (1), a main crawler (2), an auxiliary crawler (3), a main supporting structure (4), an auxiliary supporting structure (5) and a 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 crawler (2) via the main supporting structure (4); the rear end of the truss (1) is connected to the auxiliary crawler (3) via the auxiliary supporting structure (5); and the conveyor head (6) is installed on the truss (1).

2. The crawler mobile head station according to claim 1, characterized in that: The truss (1) comprises a truss upper chord (11), a truss main beam (12), a truss lower chord (13) and a tail lower chord (16); the truss upper chord (11), the truss main beam (12) and the truss lower chord (13) are arranged in sequence from top to bottom; the truss main beam (12) is kept horizontal and connected to the horizontally arranged tail lower chord (16); the tail lower chord (16) is located below the truss main beam (12) and higher than the truss lower chord (13); the truss upper chord (11) and the truss main beam (12), the truss main beam (12) and the truss lower chord (13), and the truss main beam (12) and the tail lower chord (16) are respectively connected by vertical rods.

3. The crawler mobile head station according to claim 2, characterized in that: Both ends of the truss upper chord (11) are fixed to the truss main beam (12) via diagonal supports; one end of the truss lower chord (13) is connected to the truss main beam (12) via a diagonal support, and the other end of the truss lower chord (13) is connected to the tail end lower chord (16) via a diagonal support.

4. The crawler mobile head station according to claims 1 to 3, characterized in that: The truss main beam (12) is arranged along the entire length of the truss (1); the truss upper chord (11) is shorter than the truss main beam (12), and the truss upper chord (11) is only arranged at the head of the truss (1); the tail end lower chord (16) is the shortest in length and is only arranged at the tail end of the truss (1); the truss lower chord (13) is shorter than the truss main beam (12), is arranged in the middle of the truss (1), partially overlaps with the truss upper chord (11) in the vertical direction near the head end, and is connected with the tail end truss (16) near the tail end.

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