Belt conveyor with U-shaped upper belt and tubular lower belt

Abstract

The utility model discloses a belt conveyor with a U-shaped upper portion and a tubular lower portion, which belongs to the technical field of belt conveyors and comprises a frame, a belt conveyor head and a belt conveyor tail. A belt conveyor parallel arrangement section is further arranged between the belt conveyor head and the belt conveyor tail; each of the belt conveyor head, the belt conveyor parallel arrangement section and the belt conveyor tail comprises a U-shaped upper belt surface and a tubular lower belt surface, and the running directions of the U-shaped upper belt surfaces and the tubular lower belt surfaces are opposite. The utility model can effectively solve the problems that a belt conveyor in the prior art is a set of completely independent product structure design, and the disadvantages of a corresponding U-shaped belt conveyor and a tubular belt conveyor are very obvious, so that a large amount of manpower, financial resources and material resources are needed in the aspect of solving the disadvantages, the manufacturing and mounting cost of the device is increased, and the production cost is reduced. Meanwhile, a higher or longer space needs to be occupied, and great limitation exists in the aspect of application.

Description

Technical Field

[0001] The utility model belongs to the technical field of belt conveyors. Specifically, it relates to a belt conveyor with a U-shaped upper belt and a tubular lower belt. Background Art

[0002] The tubular belt conveyor is a special type of belt conveyor developed on the basis of the traditional trough-shaped belt conveyor. The pipe belt conveyor is particularly suitable for transporting crushed materials under very complex natural terrain conditions and extremely harsh environmental conditions, which can greatly reduce production and transportation costs, beautify the transportation environment, and reduce the floor area of transportation corridors. With the requirements of modern development and the background of the country's strong advocacy of energy conservation, emission reduction, and the creation of a harmonious society, environmental protection has become an increasingly important issue in today's era. The pollution such as dust and spillage generated by ordinary conveyors during operation has attracted more and more attention from conveyor design, manufacturing, use, and administrative management departments around the world. In order to reduce the pollution generated during transportation, countries are advocating environmentally friendly ways of transporting bulk materials. Since the tubular belt conveyor is enclosed during the entire transportation process and will not cause pollution to the surrounding environment, the tubular belt conveyor with a unique conveyor method and many advantages has become an important choice for transporting bulk materials.

[0003] The U-shaped curve belt conveyor is also a special type of belt conveyor developed on the basis of the traditional trough-shaped belt conveyor. It can adapt to complex terrain layouts, has the technical characteristics of a small turning radius, a large central angle, a large conveying capacity, a large inclination angle for spatial curve layout, and long-distance transportation. When the bandwidth is the same, its conveying capacity is 40% larger than that of the tubular belt conveyor, and it is more suitable for transporting large pieces of materials than the pipe belt conveyor; it reduces the total equipment investment cost, promotes the technological progress in the field of bulk material transportation, and has significant economic and environmental benefits.

[0004] At present, the tubular belt conveyor and the U-shaped belt conveyor have gradually become important equipment for transporting bulk materials and have formed independent industries and supporting products. However, the existing belt conveyor projects all have a completely independent product structure design, and the advantages and disadvantages of the corresponding special belt conveyors are very obvious; this leads to a large amount of manpower, financial resources, and material resources required to solve their disadvantages, increasing the manufacturing and installation costs of the device. At the same time, it also requires more space or a longer length, and has great limitations in application.

[0005] Therefore, there is an urgent need to develop a belt conveyor with a U-shaped upper belt and a tubular lower belt, which has the advantages of a simple process structure, space saving, convenient operation and maintenance, low equipment failure rate, good stability, large application range, and low manufacturing and installation costs. Summary of the Utility Model

[0006] The object of the present utility model is to provide a belt conveyor with a U-shaped upper belt and a tubular lower belt in view of the above deficiencies, so as to solve the problems that the belt conveyors in the prior art are all a completely independent product structure design, and the disadvantages of the corresponding U-shaped belt conveyor and tubular belt conveyor are very obvious, resulting in a large amount of manpower, financial resources and material resources required to solve their disadvantages, increasing the manufacturing and installation costs of the device, and at the same time, it is also necessary to occupy a higher or longer space, and there are great limitations in application. To achieve the above object, the present utility model provides the following technical solutions:

[0007] A belt conveyor with a U-shaped upper belt and a tubular lower belt, comprising a frame and a belt conveyor head and a belt conveyor tail arranged on the frame; a belt conveyor parallel arrangement section is also provided between the belt conveyor head and the belt conveyor tail; the belt conveyor head, the belt conveyor parallel arrangement section and the belt conveyor tail all include a U-shaped upper belt surface and a tubular lower belt surface, and the running directions of the U-shaped upper belt surface and the tubular lower belt surface are opposite.

[0008] Further, the belt conveyor head includes a U-shaped upper belt surface head conveying section and a tubular lower belt surface head conveying section; the U-shaped upper belt surface head conveying section is arranged above the tubular lower belt surface head conveying section, and the running directions of the U-shaped upper belt surface head conveying section and the tubular lower belt surface head conveying section are opposite; the belt conveyor tail includes a U-shaped upper belt surface tail conveying section and a tubular lower belt surface tail conveying section, the U-shaped upper belt surface tail conveying section is arranged above the tubular lower belt surface tail conveying section, and the running directions of the U-shaped upper belt surface tail conveying section and the tubular lower belt surface tail conveying section are opposite; the belt conveyor parallel arrangement section includes a U-shaped upper belt surface grooving conveying section and a tubular lower belt surface tubing conveying section; the U-shaped upper belt surface tail conveying section is docked with the U-shaped upper belt surface head conveying section through the U-shaped upper belt surface grooving conveying section; the tubular lower belt surface head conveying section is docked with the tubular lower belt surface tail conveying section through the tubular lower belt surface tubing conveying section.

[0009] Further, the U-shaped upper belt surface grooving conveying section includes a straight section and a horizontal turning section; deep groove angle idler groups are continuously arranged at a certain interval on the straight section; an internally adjustable U-shaped idler group is arranged on the horizontal turning section; the deep groove angle idler groups and the internally adjustable U-shaped idler groups constrain the belt into a "U" shape.

[0010] Further, window idler groups are continuously arranged at a certain interval on the tubular lower belt surface tubing conveying section; the window idler groups constrain the belt into an "O" shape.

[0011] Further, the head conveying section of the U-shaped upper belt surface includes a grooving section at the head of the upper belt surface and a transition section at the head of the upper belt surface arranged in sequence. The tape is constrained from a "U" shape to a "one" shape along the direction from the grooving section at the head of the upper belt surface to the transition section at the head of the upper belt surface. The tail conveying section of the U-shaped upper belt surface includes a transition section at the tail of the upper belt surface, a receiving section at the tail of the upper belt surface, and a grooving section at the tail of the upper belt surface arranged in sequence. The tape is constrained from a "one" shape to a "U" shape along the direction of the transition section at the tail of the upper belt surface, the receiving section at the tail of the upper belt surface, and the grooving section at the tail of the upper belt surface.

[0012] Further, the grooving section at the head of the upper belt surface is connected to the transition section at the head of the upper belt surface. The transition section at the tail of the upper belt surface, the receiving section at the tail of the upper belt surface, and the grooving section at the tail of the upper belt surface are connected. The two ends of the grooving conveying section of the U-shaped upper belt surface are respectively butted with the grooving section at the head of the upper belt surface and the grooving section at the tail of the upper belt surface. Both the transition section at the head of the upper belt surface and the transition section at the tail of the upper belt surface include multiple groups of transition idler groups with different angles continuously arranged at a certain distance. Deep groove angle idler groups and ordinary trough idler groups are sequentially arranged on the grooving section at the head of the upper belt surface and the grooving section at the tail of the upper belt surface along the direction away from the grooving conveying section of the U-shaped upper belt surface. The receiving section at the tail of the upper belt surface is provided with buffer idler groups and a buffer bed. The deep groove angle idler groups, ordinary trough idler groups, and multiple groups of transition idler groups with different angles constrain the tape from a "U" shape to a "one" shape along the direction from the grooving section at the head of the upper belt surface to the transition section at the head of the upper belt surface. Multiple groups of the transition idler groups with different angles, buffer idler groups, ordinary trough idler groups, and deep groove angle idler groups constrain the tape from a "one" shape to a "U" shape along the direction of the transition section at the tail of the upper belt surface, the receiving section at the tail of the upper belt surface, and the grooving section at the tail of the upper belt surface.

[0013] Further, the head conveying section of the tubular lower belt surface includes an unfolding section at the head of the lower belt surface, a transition section at the head of the lower belt surface, and a tube-forming section at the head of the lower belt surface arranged in sequence. The tape is constrained from a "one" shape to an "O" shape along the direction of the unfolding section at the head of the lower belt surface, the transition section at the head of the lower belt surface, and the tube-forming section at the head of the lower belt surface. The tail conveying section of the tubular lower belt surface includes a tube-forming section at the tail of the lower belt surface, a transition section at the tail of the lower belt surface, and an unfolding section at the tail of the lower belt surface arranged in sequence. The tape is constrained from an "O" shape to a "one" shape along the direction of the tube-forming section at the tail of the lower belt surface, the transition section at the tail of the lower belt surface, and the unfolding section at the tail of the lower belt surface.

[0014] Furthermore, the head expansion section of the lower belt surface, the head transition section of the lower belt surface, and the head tube-forming section of the lower belt surface are connected; the tail tube-forming section of the lower belt surface, the tail transition section of the lower belt surface, and the tail expansion section of the lower belt surface are connected; both ends of the tubular lower belt surface tube-conveying section are respectively butt-connected with the head tube-forming section of the lower belt surface and the tail tube-forming section of the lower belt surface; both the head transition section of the lower belt surface and the tail transition section of the lower belt surface include multiple groups of angle-adjustable guiding idler groups arranged at a certain interval; both the head expansion section of the lower belt surface and the tail expansion section of the lower belt surface are provided with parallel idler groups; the multiple groups of angle-adjustable guiding idler groups and the parallel idler groups constrain the belt from the "O" shape to the "one" shape along the direction of the tail tube-forming section of the lower belt surface, the tail transition section of the lower belt surface, and the tail expansion section of the lower belt surface; the parallel idler groups and the multiple groups of angle-adjustable guiding idler groups constrain the belt from the "one" shape to the "O" shape along the direction of the head expansion section of the lower belt surface, the head transition section of the lower belt surface, and the head tube-forming section of the lower belt surface.

[0015] Furthermore, the tail of the belt conveyor further includes a tail driving drum and a tail tensioning drum; the tail driving drum is connected with a tail driving motor; the tail driving drum and the tail tensioning drum are arranged at the connection of the U-shaped upper belt surface tail conveying section and the tubular lower belt surface tail conveying section; the head of the belt conveyor further includes a head driving drum and a head tensioning drum, and the head driving drum is connected with a head driving motor; the head driving drum and the head tensioning drum are arranged at the connection of the U-shaped upper belt surface head conveying section and the tubular lower belt surface head conveying section.

[0016] Furthermore, a belt conveyor tensioning device is further provided on the head conveying section of the tubular lower belt surface; the belt conveyor tensioning device includes a first tensioning redirecting drum, a tensioning drum, and a second tensioning redirecting drum that are sequentially wound around the head conveying section of the tubular lower belt surface, and a counterweight arranged on the tensioning drum.

[0017] The beneficial effects of the utility model are:

[0018] 1) The utility model combines different special belt conveyor structures, solving the limitations of a single tubular belt conveyor, such as being restricted by the material particle size and a filling coefficient not greater than 75%. At the same time, it solves the problem that the pipe-forming lap width of the tubular belt conveyor is 1 / 3 to 1 / 2 of the pipe diameter, reducing the actual conveying capacity of the tubular belt conveyor. By using an upper belt surface U-shaped belt conveyor, the conveying capacity is 40% larger than that of a tubular belt conveyor with the same belt width, which can effectively reduce the pipe diameter of the tubular belt conveyor. The material is conveyed in the U-shaped deep groove, and a rain shield covering the upper idler or a fully sealed color steel structure can be set along the belt conveyor, which will not cause pollution to the surrounding environment. At the same time, the lower belt surface uses a tubular belt conveyor to avoid the pollution of the surrounding environment by scattered materials along the line. It can achieve environmentally friendly conveying, effectively utilize the space, greatly improve the rationality of the combination of different special equipment, save a large amount of manpower, financial resources and material resources, thus reducing the manufacturing and installation costs of the upper U-shaped and lower tubular belt conveyor, and having high economic efficiency.

[0019] 2) The device structure and process layout of the utility model are more concise, which is more conducive to the stable operation of the upper U-shaped and lower tubular belt conveyor, and greatly reduces the failure rate of the equipment.

[0020] 3) The utility model can ensure that the belt conveyor is always in a normal tension working state during operation under various working conditions, further ensuring the reliability of the conveyed materials.

[0021] In summary, the upper U-shaped and lower tubular belt conveyor proposed by the utility model has the advantages of simple structure, space saving, convenient operation and maintenance, low equipment failure rate, good stability, large application range, low manufacturing and installation costs, etc., and is suitable for wide promotion. Brief Description of the Drawings

[0022] Figure 1 is the overall structural schematic diagram of the utility model;

[0023] Figure 2 is the enlarged structural schematic diagram of the parallel layout section and the tail part of the belt conveyor of the utility model;

[0024] Figure 3 is Figure 2 the sectional structural schematic diagram in the A-A direction in

[0025] Figure 4 is Figure 2 the sectional structural schematic diagram in the B-B direction in

[0026] Figure 5 is Figure 2 the sectional structural schematic diagram in the C-C direction in

[0027] Figure 6 is Figure 2Schematic diagram of the D-D direction cross-sectional structure therein;

[0028] In the accompanying drawings: 1 - frame; 2 - head of the belt conveyor; 3 - parallel arrangement section of the belt conveyor; 4 - tail of the belt conveyor; 5 - feeding chute; 6 - tail driving roller; 7 - tail idler pulley for increasing wrap angle; 8 - tubular lower belt surface tail conveying section; 9 - U-shaped upper belt surface tail conveying section; 10 - tubular lower belt surface tube-forming conveying section; 11 - U-shaped upper belt surface trough-forming conveying section; 12 - tubular lower belt surface head conveying section; 13 - U-shaped upper belt surface head conveying section; 14 - second tension redirecting roller; 15 - tensioning roller; 16 - counterweight; 17 - first tension redirecting roller; 18 - head idler pulley for increasing wrap angle; 19 - head driving roller; 20 - trough-forming conveying section idler set; 21 - window-type idler set; 22 - deep trough angle idler set; 23 - guiding idler; 24 - ordinary trough idler set; 25 - parallel idler set. Specific embodiments

[0029] The following will describe the present utility model in detail with reference to the accompanying drawings. To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0030] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] See attached Figures 1 to 6 The present utility model is a belt conveyor with a U-shaped upper belt and a tubular lower belt, including a frame 1, a belt conveyor head 2 and a belt conveyor tail 4 arranged on the frame 1, and also including a belt conveyor parallel arrangement section 3 arranged on the frame 1. The belt conveyor parallel arrangement section 3 is arranged between the belt conveyor head 2 and the belt conveyor tail 4, where:

[0032] The belt conveyor head 2 includes a U-shaped upper belt surface head conveying section 13 and a tubular lower belt surface head conveying section 12. The U-shaped upper belt surface head conveying section 13 is arranged above the tubular lower belt surface head conveying section 12, and the running directions of the upper and lower belt conveying sections of the belt conveyor head 2 are opposite;

[0033] The belt conveyor tail 4 includes an upper belt surface U-shaped belt conveyor tail conveying section 9 and a lower belt surface tubular belt conveyor head conveying section 8. The upper belt surface U-shaped belt conveyor tail conveying section 9 is arranged above the lower belt surface tubular belt conveyor head conveying section 8, and the running directions of the upper and lower belt conveying sections of the belt conveyor tail 4 are opposite;

[0034] The tail conveying section 9 of the U-shaped upper belt surface is docked with the trough-forming conveying section 11 of the U-shaped upper belt surface and the head conveying section 13 of the U-shaped upper belt surface, and conveys the materials at the feeding end of the tail conveying section 9 of the U-shaped upper belt surface to the discharging end on the head conveying section 13 of the U-shaped upper belt surface.

[0035] The head conveying section 12 of the tubular lower belt surface is connected to the tube-forming conveying section 10 of the tubular lower belt surface and the tail conveying section 8 of the tubular lower belt surface, and conveys the materials adhered to the carrying surface of the return section belt of the belt conveyor in the tubular belt to avoid environmental pollution caused by scattered materials along the line.

[0036] The parallel arrangement section 3 of the belt conveyor includes the trough-forming conveying section 11 of the U-shaped upper belt surface and the tube-forming conveying section 10 of the tubular lower belt surface. The trough-forming conveying section 11 of the U-shaped upper belt surface is arranged above the tube-forming conveying section 10 of the tubular lower belt surface, and the running directions of the upper and lower belts in the parallel arrangement section 3 of the belt conveyor are opposite; in the parallel arrangement section, the trough-forming conveying section idler group 20 provided in the trough-forming conveying section 11 of the U-shaped upper belt surface includes a deep groove angle idler group 22 arranged continuously at a certain interval and an internally adjustable U-shaped idler group arranged in the horizontal turning section. The internally adjustable U-shaped idler group is adjusted by installing the cross beam on the adjustable angle hinge support, so as to realize the smooth turning of the free guiding of the horizontal turning section of the belt conveyor; the trough-forming conveying section idler group 20 can be connected to the frame 1, and the trough-forming conveying section idler group 20 restricts the belt to form a U shape. In the parallel arrangement section, the tube-forming conveying section idler group provided in the tube-forming conveying section 10 of the tubular lower belt surface includes a window-type idler group 21 arranged continuously at a certain interval. The hexagonal arrangement of the window-type idler group 21 restricts the belt to form an "O" shape.

[0037] Specifically, the head conveying section 13 of the U-shaped upper belt surface includes a head trough-forming section and a head transition section of the upper belt surface arranged in sequence; the tail conveying section 9 of the U-shaped upper belt surface includes a tail transition section, a tail receiving section, and a tail trough-forming section of the upper belt surface arranged in sequence.

[0038] In the embodiment, the grooving section of the upper belt surface head is connected to the transition section of the upper belt surface head; the transition section of the upper belt surface tail, the receiving section of the upper belt surface tail and the grooving section of the upper belt surface tail are connected. The transition section of the upper belt surface head includes multiple groups of transition idler sets with different angles continuously arranged at a certain distance (such as transition idler sets with angles of 10°, 20°, 30°, etc.); both the grooving section of the upper belt surface head and the grooving section of the upper belt surface tail adopt deep-groove angle idler sets 22 and ordinary trough-shaped idler sets 24 with an angle of 35° or 45°; the receiving section of the upper belt surface tail is composed of a buffer idler set with an angle of 35° or 45° and a buffer bed. Multiple groups of transition idler sets with different angles, deep-groove angle idler sets 22, and ordinary trough-shaped idler sets 24 can all be connected to the frame 1. Multiple groups of the said transition idler sets with different angles, buffer idler sets, ordinary trough-shaped idler sets, and deep-groove angle idler sets 22 make the belt change from "one" shape → 35° or 45° trough shape → "U" shape along the transition section of the upper belt surface tail, the receiving section of the upper belt surface tail, and the grooving section of the upper belt surface tail (the upper belt surface of the head 2 of the belt conveyor is opposite).

[0039] Specifically, the conveying section 12 of the tubular lower belt surface head includes a lower belt surface head unfolding section, a lower belt surface head transition section, and a lower belt surface head pipe-forming section arranged in sequence. The conveying section 8 of the tubular lower belt surface tail includes a lower belt surface tail pipe-forming section, a lower belt surface tail transition section, and a lower belt surface tail unfolding section arranged in sequence.

[0040] In the embodiment, the lower belt surface head unfolding section, the lower belt surface head transition section, and the lower belt surface head pipe-forming section are connected, and then are connected to the lower belt surface tail pipe-forming section, the lower belt surface tail transition section, and the lower belt surface tail unfolding section in sequence through the tubular lower belt surface pipe-forming conveying section 10. The lower belt surface tail transition section all includes multiple groups of adjustable guiding idlers 23 continuously arranged at a certain distance. The adjustable guiding idler 23 is composed of adjustable idler sets on both sides and a middle belt pressing roller, gradually transitioning the belt into a "one" shape, and is received by the parallel idler set 25 at the tail tensioning roller 7; the adjustable guiding idlers 23 are all connected to the frame 1, and the adjustable guiding idlers 23 constrain the belt surface of the lower belt surface tail transition section to form: "O" shape → reverse U shape → "one" shape (the lower belt surface head transition section is opposite).

[0041] In the embodiment, the tail 4 of the belt conveyor further includes a tail driving roller 6 and a tail tensioning roller 7. The tail driving roller is drivingly connected with a tail driving motor (not shown in the figure). The tail driving roller 6 and the tail tensioning roller 7 are arranged at the connection of the U-shaped upper belt surface tail conveying section 9 and the tubular lower belt surface tail conveying section 8. The head 2 of the belt conveyor further includes a head driving roller 19 and a head tensioning roller 18. The head driving roller 19 is connected with a head driving motor (not shown in the figure). The head driving roller 19 and the head tensioning roller 18 are arranged at the connection of the U-shaped upper belt surface head conveying section 13 and the tubular lower belt surface head conveying section 12.

[0042] In addition, a belt conveyor tensioning device is provided on the left side of the head conveying section 12 of the tubular lower belt surface. The belt conveyor tensioning device includes a first tension redirecting roller 17, a tensioning roller 15, and a second tension redirecting roller 14 that are sequentially wound around the lower belt surface of the head 2 of the belt conveyor, and a counterweight 16 arranged on the tensioning roller 15. The setting of the belt conveyor tensioning device can keep the belt of the belt conveyor in a tensioned state, meet the non-slip condition of the belt conveyor and the minimum sag condition between the idler groups, and ensure the safe operation of the belt conveyor.

[0043] The present utility model further includes other devices or components that enable its normal use, all of which are conventional technical means in the art; in addition, for the devices or components not defined in the present utility model, such as the frame 1, adjustable guiding idler 23, first tension redirecting roller 17, second tension redirecting roller 14, tensioning roller 15, head driving roller 19, tail driving roller 6, etc., conventional means in the art are adopted. Those skilled in the art can select their models and installation methods according to actual usage requirements and clearly understand how to install and control them specifically, so no detailed description will be given here.

[0044] As Figures 1 to 6 shown, the working principle of the present utility model is: The belt conveyor with a U-shaped upper belt and a tubular lower belt realizes material conveying through the head driving roller 19 and the head driving motor, and the tail driving roller 6 and the tail driving motor. For example, materials are added to the feeding chute 5 arranged on the tail conveying section of the U-shaped upper belt surface through the feeding opening of the tail conveying section 9 of the U-shaped upper belt surface, and the materials are unloaded from the right to the left and after passing through the trough-forming conveying section 11 of the U-shaped upper belt surface to the discharging end of the head conveying section 13 of the U-shaped upper belt surface; the lower belt surface is arranged as a tubular belt conveyor, and the materials adhered to the carrying surface of the return section belt are wrapped in the tubular belt and run, avoiding environmental pollution caused by scattered materials along the line. Among them, Figure 1 the "S" and "X" in

[0045] represent the movement direction of the conveyor belt. The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A belt conveyor with a U-shaped upper belt and a tubular lower belt, characterized in that: The invention comprises a frame (1), a belt conveyor head (2) and a belt conveyor tail (4) arranged on the frame (1); a belt conveyor parallel arrangement section (3) is also arranged between the belt conveyor head (2) and the belt conveyor tail (4); the belt conveyor head (2), the belt conveyor parallel arrangement section (3) and the belt conveyor tail (4) all comprise a U-shaped upper belt surface and a tubular lower belt surface, and the U-shaped upper belt surface and the tubular lower belt surface run in opposite directions.

2. The belt conveyor with a U-shaped upper belt and a tubular lower belt according to claim 1, characterized in that: The belt conveyor head (2) comprises a U-shaped upper belt surface head conveying section (13) and a tubular lower belt surface head conveying section (12); the U-shaped upper belt surface head conveying section (13) is arranged above the tubular lower belt surface head conveying section (12), and the U-shaped upper belt surface head conveying section (13) and the tubular lower belt surface head conveying section (12) run in opposite directions; the belt conveyor tail (4) comprises a U-shaped upper belt surface tail conveying section (9) and a tubular lower belt surface tail conveying section (8); the U-shaped upper belt surface tail conveying section (9) is arranged above the tubular lower belt surface tail conveying section ( 8), and the running directions of the U-shaped upper belt surface tail conveying section (9) and the tubular lower belt surface tail conveying section (8) are opposite; the parallel arrangement section (3) of the belt conveyor comprises a U-shaped upper belt surface troughing conveying section (11) and a tubular lower belt surface tube conveying section (10); the U-shaped upper belt surface tail conveying section (9) is butt-jointed with the U-shaped upper belt surface head conveying section (13) through the U-shaped upper belt surface troughing conveying section (11); the tubular lower belt surface head conveying section (12) is butt-jointed with the tubular lower belt surface tail conveying section (8) through the tubular lower belt surface tube conveying section (10).

3. The belt conveyor with a U-shaped upper belt and a tubular lower belt according to claim 2, characterized in that: The U-shaped upper belt surface groove conveying section (11) comprises a straight section and a horizontal turning section; the straight section is provided with a deep groove angle roller group (22) arranged continuously at a certain interval; the horizontal turning section is provided with a U-shaped roller group with an adjustable inner lift angle; the deep groove angle roller group (22) and the U-shaped roller group with an adjustable inner lift angle constrain the belt into a "U" shape.

4. The belt conveyor with a U-shaped upper belt and a tubular lower belt according to claim 3, characterized in that: The tubular lower belt surface forming and conveying section (10) is provided with a window type roller group (21) which is continuously arranged at a certain interval; the window type roller group (21) constrains the adhesive belt into an "O" shape.

5. The belt conveyor with a U-shaped upper belt and a tubular lower belt according to claim 3, characterized in that: The U-shaped upper belt surface head conveying section (13) comprises an upper belt surface head trough section and an upper belt surface head transition section which are arranged in sequence, and the adhesive tape is constrained from a "U" shape to a "S" shape along the direction from the upper belt surface head trough section to the upper belt surface head transition section; the U-shaped upper belt surface tail conveying section (9) comprises an upper belt surface tail transition section, an upper belt surface tail receiving section and an upper belt surface tail trough section which are arranged in sequence, and the adhesive tape is constrained from a "S" shape to a "U" shape along the direction from the upper belt surface tail transition section, the upper belt surface tail receiving section and the upper belt surface tail trough section.

6. The belt conveyor with a U-shaped upper belt and a tubular lower belt according to claim 4, characterized in that: The upper belt surface head grooving section is connected to the upper belt surface head transition section; the upper belt surface tail transition section and the upper belt surface tail material receiving section are connected to the upper belt surface tail grooving section; the two ends of the U-shaped upper belt surface grooving conveying section (11) are respectively connected to the upper belt surface head grooving section and the upper belt surface tail grooving section; the upper belt surface head transition section and the upper belt surface tail transition section both include a plurality of groups of transition roller groups with different angles arranged continuously at a certain distance; the upper edges of the upper belt surface head grooving section and the upper belt surface tail grooving section are sequentially provided with deep groove angle roller groups (22) in the direction away from the U-shaped upper belt surface grooving conveying section (11). ) and a common groove roller group (24); the upper belt surface tail receiving section is provided with a buffer roller group and a buffer bed; the deep groove angle roller group (22), the common groove roller group (24) and multiple groups of transition roller groups with different angles constrain the belt from a "U" shape to a "S" shape along the direction from the upper belt surface head groove section to the upper belt surface head transition section; multiple groups of transition roller groups with different angles, buffer roller groups, common groove roller groups (24) and deep groove angle roller groups (22) constrain the belt from a "S" shape to a "U" shape along the upper belt surface tail transition section, the upper belt surface tail receiving section and the upper belt surface tail groove section.

7. The belt conveyor with a U-shaped upper belt and a tubular lower belt according to claim 5, characterized in that: The tubular lower belt surface head conveying section (12) comprises a lower belt surface head unfolding section, a lower belt surface head transition section and a lower belt surface head tube section which are arranged in sequence, and the adhesive tape is constrained from an "O" shape along the direction of the lower belt surface head unfolding section, the lower belt surface head transition section and the lower belt surface head tube section; the tubular lower belt surface tail conveying section comprises a lower belt surface tail tube section, a lower belt surface tail transition section and a lower belt surface tail unfolding section which are arranged in sequence, and the adhesive tape is constrained from an "O" shape to an "I" shape along the direction of the lower belt surface tail tube section, the lower belt surface tail transition section and the lower belt surface tail unfolding section.

8. The belt conveyor with a U-shaped upper belt and a tubular lower belt according to claim 6, characterized in that: The lower belt surface head unfolding section, the lower belt surface head transition section and the lower belt surface head pipe section are connected; the lower belt surface tail pipe section, the lower belt surface tail transition section and the lower belt surface tail unfolding section are connected; the two ends of the tubular lower belt surface pipe conveying section (10) are respectively connected to the lower belt surface head pipe section and the lower belt surface tail pipe section; the lower belt surface head transition section and the lower belt surface tail transition section both include multiple groups of angle-adjustable guide rollers (23) arranged at a certain interval; the lower belt surface head unfolding section and the lower belt surface tail pipe section are connected to the lower belt surface tail transition section; the lower belt surface tail ... A parallel roller group (25) is provided on each unfolding section; multiple groups of angle-adjustable guide rollers (23) and parallel roller groups (25) constrain the direction of the adhesive tape along the lower belt surface tail tube section, the lower belt surface tail transition section and the lower belt surface tail unfolding section from an "O" shape to an "I" shape; the parallel roller group (25) and multiple groups of angle-adjustable guide rollers (23) constrain the direction of the adhesive tape along the lower belt surface head unfolding section, the lower belt surface head transition section and the lower belt surface head tube section from an "I" shape to an "O" shape.

9. The belt conveyor with a U-shaped upper belt and a tubular lower belt according to claim 7, characterized in that: The tail portion (4) of the belt conveyor further comprises a tail drive roller (6) and a tail surface increasing roller (7); the tail drive roller (6) is connected to a tail drive motor; the tail drive roller (6) and the tail surface increasing roller (7) are arranged at the junction of the U-shaped upper belt surface tail conveying section (9) and the tubular lower belt surface tail conveying section (8); the head portion (2) of the belt conveyor further comprises a head drive roller (19) and a head surface increasing roller (18); the head drive roller (19) is connected to a head drive motor; the head drive roller (19) and the head surface increasing roller (18) are arranged at the junction of the U-shaped upper belt surface head conveying section (13) and the tubular lower belt surface head conveying section (12).

10. The belt conveyor with a U-shaped upper belt and a tubular lower belt according to claim 8, characterized in that: The tubular lower belt head conveying section (12) is also provided with a belt conveyor tensioning device; the belt conveyor tensioning device comprises a first tensioning redirecting roller (17), a tensioning roller (15) and a second tensioning redirecting roller (14) which are sequentially wound around the tubular lower belt head conveying section (12), and a counterweight (16) arranged on the tensioning roller (15).

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