Belt conveyor and concrete mixing plant

Abstract

The utility model belongs to the field of concrete mixing plants, and discloses a belt conveyor and a concrete mixing plant. The belt conveyor comprises a machine frame, and a rotary conveying belt is installed on the machine frame. The scraper cleaner is fixed on the rack and arranged on the return stroke section of the rotary conveying belt, and the scraper cleaner comprises a scraper used for elastically pressing the top edge of the scraper to the working belt surface of the rotary conveying belt on the return stroke section. According to the belt conveyor, the scraper sweeper is additionally arranged on the return stroke section of the rotary conveying belt, accumulated materials on the working belt face of the rotary conveying belt can be scraped away through the scraper, the belt pressing roller and the cleaning pipe at the head are combined, the purpose of comprehensively cleaning the accumulated materials can be achieved, and water stains and remaining materials are effectively scraped away.

Description

Technical Field

[0001] The present application belongs to the field of concrete mixing plants, and in particular, relates to a concrete mixing plant and a belt conveyor thereof. Background Art

[0002] In concrete mixing plants, belt conveyors are generally used to transport sand and gravel aggregates. During operation, varying degrees of material accumulation are inevitable on the working surface of the belt. During the return stroke, excess material falls into the receiving trough at the bottom of the belt conveyor frame, resulting in a large amount of material accumulation in the receiving trough. To reduce material accumulation on the belt and ensure its normal operation, the existing technology usually equips the head of the belt conveyor with a flushing pipe to flush the working surface of the belt and reduce the adhesion and accumulation of material on the belt. However, this flushing effect is not significant. Not only is it difficult to completely remove the accumulated material on the belt, but increasing the flushing flow rate will result in high costs and waste. The accumulated material in the receiving trough and other components is also difficult to effectively clean. Summary of the Invention

[0003] The purpose of the present application is to provide a belt conveyor and a concrete mixing plant to effectively remove accumulated materials on the working surface of the belt.

[0004] To achieve the above objectives, the present application provides a belt conveyor, comprising:

[0005] A frame, wherein a rotary conveyor belt is installed on the frame;

[0006] A scraper cleaner is fixed on the frame and arranged on the return section of the rotary conveyor belt. The top edge of the scraper cleaner is elastically pressed against the working belt surface of the return section of the rotary conveyor belt.

[0007] In some embodiments, the scraper sweeper comprises:

[0008] The scraper is fixedly mounted on the scraper mounting shaft, and both ends of the scraper mounting shaft are pivotally mounted on the frame;

[0009] The end spring elastically applies pressure to the end of the scraper mounting shaft so that the top edge of the scraper is elastically pressed against the rotary conveyor belt.

[0010] In some embodiments, the belt conveyor includes:

[0011] The belt holding roller is fixed on the frame and is used to press downward the inner belt surface of the rotary conveyor belt. The belt holding roller is arranged in the return section of the rotary conveyor belt and is arranged at intervals behind the scraper sweeper along the return conveying direction of the rotary conveyor belt.

[0012] In some embodiments, the belt hold roller and the scraper are located on both sides of the belt surface of the rotary conveyor belt and are arranged along the belt width direction, and the vertical gap between the belt hold roller and the scraper is smaller than the belt thickness of the rotary conveyor belt.

[0013] In some embodiments, the belt holding roller elastically presses against the inner belt surface of the rotary conveyor belt.

[0014] In some embodiments, the belt conveyor includes:

[0015] A head redirecting roller, which is arranged at the head of the frame and located in the return section of the rotary conveyor belt;

[0016] a cleaning pipe, arranged immediately behind the head redirecting roller and used for flushing the working belt surface of the rotary conveyor belt in the return section;

[0017] Wherein, the scraper cleaners are arranged at intervals behind the cleaning pipe along the return conveying direction of the rotary conveyor belt.

[0018] In some embodiments, the belt conveyor further includes a material receiving trough arranged below the frame, and the cleaning pipe is further used to flush the material receiving trough obliquely downward.

[0019] In some embodiments, a first set of drainage holes for obliquely flushing the rotary conveyor belt upward and a second set of drainage holes for obliquely flushing the material receiving trough downward are provided on the circumferential wall of the cleaning pipe.

[0020] In some embodiments, the belt conveyor includes:

[0021] A head return roller is provided at the head of the frame, and the head redirecting roller is located behind the head return roller;

[0022] A head cleaner is used to clean the working belt surface of the rotary conveyor belt wound around the head return roller.

[0023] The present application also provides a concrete mixing station, which includes the above-mentioned belt conveyor.

[0024] In the belt conveyor of the present application, a scraper cleaner is added to the return section of the rotary conveyor belt. The top edge of the scraper cleaner can be elastically pressed against the working belt surface of the return section of the rotary conveyor belt. Therefore, when the rotary conveyor belt moves in a rotating manner, the top edge of the scraper can be used to completely scrape off the accumulated materials on the working belt surface of the rotary conveyor belt. It can also effectively scrape off water stains and other residual materials, thereby reducing belt wear and labor maintenance costs.

[0025] Other advantages of the present application and the technical effects of the preferred embodiments will be further described in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without inventive work. In the drawings:

[0027] Figure 1 Schematic diagram of the structure of the belt conveyor according to the present application;

[0028] Figure 2 for Figure 1 AA section view of the belt conveyor;

[0029] Figure 3 for Figure 1 BB cross-sectional view in the belt conveyor.

[0030] Description of Reference Numerals

[0031] 1 Cleaning pipe 2 Scraper cleaner

[0032] 3 Belt pressing roller 4 End spring

[0033] 5 scraper 6 roller

[0034] 7 Rotating conveyor belt 8 Head cleaner

[0035] 9 Head redirection roller 10 Head return roller

[0036] 100 frame 51 scraper mounting shaft

[0037] C1 first cleaning direction C2 second cleaning direction

[0038] Y return conveying direction DETAILED DESCRIPTION

[0039] The following describes the specific embodiments of the present application in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not intended to limit the present application. It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0040] The belt conveyor and concrete mixing station of the present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] like Figure 1 As shown, in a specific embodiment of the present application, a new belt conveyor is disclosed, which includes:

[0042] A frame 100, on which a rotary conveyor belt 7 is mounted;

[0043] The scraper cleaner 2 is fixed on the frame 100 and is arranged on the return section of the rotary conveyor belt 7. The top edge of the scraper cleaner 2 elastically presses against the working belt surface of the return section of the rotary conveyor belt.

[0044] In a conventional belt conveyor, the working surface of the rotary conveyor belt 7 will continuously pick up accumulated sand and gravel aggregates during operation. The accumulated materials will wear out the working surface, affecting the life of the belt and easily causing collisions with other components such as the frame 100. Moreover, the accumulated materials will continuously fall into the receiving trough (not shown) below the frame 100 in the return section (the return conveying direction Y indicated by the left arrow in the figure) of the rotary conveyor belt 7, requiring the operator to perform maintenance on the receiving trough at intervals, resulting in high maintenance costs.

[0045] The belt conveyor of this application is specifically equipped with a scraper cleaner 2, which uses the top edge of the scraper cleaner 2 to scrape off the accumulated material on the working belt surface of the rotary conveyor belt 7, thereby achieving the purpose of fully cleaning the accumulated material. Figure 2 As shown, the top edge of the scraper 5 (i.e., the top edge of the scraper cleaner 2) can be elastically pressed against the working belt surface of the return conveyor belt 7. Therefore, when the return conveyor belt 7 moves along the return conveying direction Y, the surface material will be blocked by the scraper 5 in the fixed scraper cleaner 2 and fall into the material receiving trough below the frame 100. In addition, as will be explained below, after flushing the return conveyor belt 7, the scraper cleaner 2 can further scrape off water stains and residual materials from the belt.

[0046] In this embodiment, the scraper cleaner 2 can be fixed on the frame 100 by welding the mounting base. Since the working belt surface of the rotary conveyor belt 7 faces downward in the return section of the rotary conveyor belt 7, the scraper cleaner 2 can be arranged just below the rotary conveyor belt 7.

[0047] In order to achieve a better scraping effect of accumulated materials, the scraper sweeper 2 of this embodiment includes:

[0048] The scraper 5 is fixedly mounted on the scraper mounting shaft 51, and both ends of the scraper mounting shaft 51 are pivotally mounted on the frame 100;

[0049] The end spring 4 elastically applies pressure to the end of the scraper mounting shaft 51 , so that the top edge of the scraper 5 abuts against the rotary conveyor belt 7 .

[0050] Alternatively, the scraper 5 can be rigidly arranged, that is, directly or indirectly fixedly mounted on the frame 100, so that the working surface of the rotary conveyor belt 7 contacts the scraper 5 of the rigid structure, and the accumulated material on the belt can be scraped off. However, in order to avoid unnecessary damage caused by the collision of the accumulated material on the scraper 5, the scraper 5 can be movably arranged, that is,Figure 2 As shown, the main body of the scraper 5 is pivotally mounted at both ends of the scraper mounting shaft 51 at the bottom edge, so that when the accumulated material is large or the adhesion is strong, the scraper 5 can pivot to avoid it and produce collision buffering. Among them, the scraper 5 is arranged along the width direction of the working belt surface of the rotary conveyor belt 7 and the top edge of the scraper extends upward toward the working belt surface, as shown in FIG. Figure 2 shown.

[0051] Furthermore, an end spring 4 may be provided at the end of the scraper mounting shaft 51. The end spring 4 shown in the figure is a tension spring that applies an elastic force to the scraper 5, thereby causing the top edge of the scraper 5 to maintain elastic contact with the working surface of the rotary conveyor belt 7. In addition, by adjusting or replacing the end spring 4, the gap between the scraper 5 and the rotary conveyor belt 7 can also be adjusted.

[0052] Since there is no load on the rotary conveyor belt 7 during the return journey, the conveyor belt tends to float upward, making it difficult for the scraper 5 to completely scrape off the accumulated material. For this reason, the belt conveyor may further include a belt pressing roller 3, which provides a pressing force to the cleaned belt to prevent the belt from deviating. Figure 1 As shown, the belt holding roller 3 is fixed on the frame 100 and is used to press downward the inner belt surface of the rotary conveyor belt 7. The belt holding roller 3 is set in the return section of the rotary conveyor belt 7 and is arranged at intervals behind the scraper cleaner 2 along the return conveying direction Y of the rotary conveyor belt 7. Figure 1 The belt pressing roller 3 shown presses down the rotary conveyor belt 7, so that the working belt surface of the rotary conveyor belt 7 can better fit downwardly the top edge of the scraper 5, thereby improving the scraping effect of accumulated materials.

[0053] like Figure 3 As shown, the belt hold roller 3 is fixedly mounted above the rotary conveyor belt 7 on the return section. The belt hold roller 3 and scraper 5 are located above and below the belt surface of the rotary conveyor belt 7 and are arranged along the belt width. Specifically, the vertical gap between the fixed belt hold roller 3 and scraper 5 should be less than the thickness of the rotary conveyor belt 7 to ensure that the scraper 5 can fully contact the working belt surface of the rotary conveyor belt 7.

[0054] Alternatively, the belt holding roller 3 is not limited to a fixed installation, and the belt holding roller 3 can also be elastically pressed against the inner belt surface of the rotary conveyor belt 7, that is, the belt holding roller 3 is elastically pressed downward by an additional spring.

[0055] It can be seen that the scraper cleaner 2 combined with the belt pressing roller 3 can better and more comprehensively remove the accumulated materials on the working belt surface. Before this, in order to achieve a better scraping effect, the accumulated materials should be wet scraped as much as possible, that is, the working belt surface should be pre-flushed. Therefore, the belt conveyor of this embodiment also includes:

[0056] The head redirecting roller 9 is arranged at the head of the frame 100 and is located in the return section of the rotary conveyor belt 7;

[0057] The cleaning pipe 1 is arranged immediately behind the head redirecting roller 9 and is used to wash the working belt surface of the rotary conveyor belt 7 in the return section;

[0058] The scraper cleaners 2 are arranged at intervals behind the cleaning pipe 1 along the return conveying direction Y of the rotary conveyor belt 7 .

[0059] Those skilled in the art will appreciate that the head redirecting roller 9 is used to control the position and conveying direction of the rotary conveyor belt 7. When the cleaning pipe 1 is positioned adjacent to the head redirecting roller 9, the rotary conveyor belt 7 can be flushed as soon as possible during the return section, thereby removing accumulated material on the working belt surface. The remaining accumulated material also reduces its adhesion to the belt surface, facilitating subsequent scraping by the scraper.

[0060] In addition, the belt conveyor also includes a material receiving trough (not shown) arranged below the frame 100. The cleaning pipe 1 can also be used to flush the material receiving trough diagonally downward. In the material receiving trough located in the middle section below the frame 100, there is local material accumulation on both sides. The accumulated material is large and difficult to clean. The installation of the cleaning pipe 1 for cleaning the material receiving trough can expand the cleaning area and cleaning area, reducing labor maintenance costs.

[0061] In order to achieve simultaneous flushing of the belt and the receiving trough, multiple water pipes can be arranged. However, in this embodiment, a first set of drainage holes for diagonally flushing the rotary conveyor belt 7 and a second set of drainage holes for diagonally flushing the receiving trough are provided on the peripheral wall of a single cleaning pipe 1. Figure 1 As shown, the first set of drainage holes faces the first cleaning direction C1, that is, the oblique rear-upward direction in the figure, and the second set of drainage holes faces the second cleaning direction C2, that is, the oblique rear-downward direction in the figure. By providing two sets of drainage holes and controlling the directions of the drainage holes, it is possible to simultaneously flush the rotary conveyor belt 7 and the receiving trough.

[0062] In addition, the belt conveyor may also include:

[0063] The head return roller 10 is arranged at the head of the frame 100, and the head redirection roller 9 is located behind the head return roller 10;

[0064] The head cleaner 8 is used to clean the working belt surface of the rotary conveyor belt 7 wound around the head return roller 10.

[0065] Those skilled in the art will appreciate that the head return roller 10 is used to control the return of the rotary conveyor belt 7 to the return section. The rotary conveyor belt 7 needs to be wound around the head return roller 10. The head cleaner 8 cleans the working surface of the rotary conveyor belt 7 wound around the head return roller 10, providing a preliminary cleanup of accumulated sand and gravel aggregate on the working surface. The head cleaner 8 can be performed by water washing or air washing, for example.

[0066] The present application also discloses a concrete mixing station, which includes the above-mentioned belt conveyor.

[0067] When the concrete mixing plant is operating, the belt conveyor will use the head cleaner 8 to remove the remaining material when feeding. After the feeding is completed, the working belt surface of the belt passes through the head redirecting roller 9 and enters the return section. At this time, the belt begins to be cleaned. A cleaning pipe 1 is installed behind the head redirecting roller 9. Two rows of holes are arranged on the pipe, and they form a certain angle, providing two cleaning directions, one for flushing the working belt surface and the other for flushing the material receiving trough. The scraper cleaner 2 is installed behind the cleaning pipe 1. Its scraper 5 is completely in contact with the belt, which can scrape off water stains and stubborn accumulated materials on the working belt surface. The belt pressing roller 3 is installed behind the scraper cleaner 2. Its roller 6 presses on the inner surface of the belt, providing sufficient pressing force to prevent the belt from swinging up and down, ensuring the normal use of the belt.

[0068] The design of the cleaning pipe 1 at the head redirection roller 9 with two rows of flushing holes allows for simultaneous flushing of the working belt surface and the material receiving trough, increasing the number of cleaning locations and the area covered. The addition of a scraper cleaner behind the cleaning pipe removes both water stains and sticky material from the belt surface. These improvements clean the working belt surface, significantly reducing material accumulation in the receiving trough even at locations far from the cleaning point, including the rear end of the weighted section for waterless cleaning, significantly reducing labor and maintenance costs.

[0069] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0070] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0072] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A belt conveyor, characterized in that: The belt conveyor comprises: A frame (100), wherein a rotary conveyor belt (7) is mounted on the frame (100); A scraper cleaner (2) is fixed on the frame (100) and arranged on the return section of the rotary conveyor belt (7), and the top edge of the scraper cleaner (2) is elastically pressed against the working belt surface of the return section of the rotary conveyor belt (7).

2. The belt conveyor according to claim 1, characterized in that: The scraper sweeper (2) comprises: A scraper (5) is fixedly mounted on a scraper mounting shaft (51), and both ends of the scraper mounting shaft (51) are pivotally mounted on the frame (100); The end spring (4) elastically applies pressure to the end of the scraper mounting shaft (51), so that the top edge of the scraper (5) abuts against the rotary conveyor belt (7).

3. The belt conveyor according to claim 2, characterized in that: The belt conveyor comprises: A belt holding roller (3) is fixed on the frame (100) and is used to press downward against the inner belt surface of the rotary conveyor belt (7). The belt holding roller (3) is arranged in the return section of the rotary conveyor belt (7) and is spaced behind the scraper cleaner (2) along the return conveying direction (Y) of the rotary conveyor belt (7).

4. The belt conveyor according to claim 3, characterized in that: The belt holding roller (3) and the scraper (5) are located on both sides of the belt surface of the rotary conveyor belt (7) and are arranged along the belt width direction. The vertical gap between the belt holding roller (3) and the scraper (5) is smaller than the belt thickness of the rotary conveyor belt (7).

5. The belt conveyor according to claim 3, characterized in that: The belt holding roller (3) elastically presses against the inner belt surface of the rotary conveyor belt (7).

6. The belt conveyor according to any one of claims 1 to 5, characterized in that: The belt conveyor comprises: A head redirecting roller (9) is arranged at the head of the frame (100) and located in the return section of the rotary conveyor belt (7); A cleaning pipe (1) is arranged immediately behind the head redirecting roller (9) and is used to flush the working belt surface of the rotary conveyor belt (7) in the return section; The scraper cleaners (2) are arranged at intervals behind the cleaning pipe (1) along the return conveying direction (Y) of the rotary conveyor belt (7).

7. The belt conveyor according to claim 6, characterized in that: The belt conveyor further comprises a material receiving trough arranged below the frame (100), and the cleaning pipe (1) is also used for flushing the material receiving trough obliquely downward.

8. The belt conveyor according to claim 7, characterized in that: The circumferential wall of the cleaning pipe (1) is provided with a first group of drainage holes for obliquely flushing the rotary conveyor belt (7) upwards and a second group of drainage holes for obliquely flushing the receiving trough downwards.

9. The belt conveyor according to claim 6, characterized in that: The belt conveyor comprises: A head return roller (10) is arranged at the head of the frame (100), and the head redirecting roller (9) is located behind the head return roller (10); A head cleaner (8) is used to clean the working belt surface of the rotary conveyor belt (7) wound around the head return roller (10).

10. A concrete mixing station, characterized in that: The concrete mixing station includes the belt conveyor according to any one of claims 1 to 9.

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