Enclosed corridor for conveying concrete and aggregate in large-scale mixing plants

Abstract

This invention discloses a closed-loop conveyor for transporting concrete and aggregates in a large-scale mixing plant, belonging to the technical field of closed-loop conveyors. The invention includes a support frame fixedly installed above the ground, with a lower support fixedly installed at the upper end of the support frame, and a patterned steel plate fixedly installed on the upper surface of the lower support. It also includes: a walkway fixedly installed on the patterned steel plate for workers to walk and perform maintenance; and an expansion joint mechanism installed between two adjacent sections of the conveyor belt to ensure stable thermal contraction of the conveyor belt. The expansion joint mechanism includes two fixed frames respectively fixedly installed on the outer sides of the two sections of the conveyor belt. This closed-loop conveyor for transporting concrete and aggregates in a large-scale mixing plant can provide stable support and protection for the conveyor belt. The closed structure improves safety during transport, while the positioning and fixing supports and the expansion joint mechanism reduce stress changes on the conveyor belt due to temperature variations, further improving the structural stability of the conveyor belt.

Description

Technical Field

[0001] This invention relates to the field of enclosed corridor technology, specifically to enclosed corridors for conveying concrete and aggregates in large-scale mixing plants. Background Technology

[0002] In the concrete mixing system, aggregate transportation between the mixing plant, workshops, and silos is carried out using belt conveyors. The overhead belt conveyors are of two types: the conveyor bridges for feeding the mixing plant and the station use under-bearing bridges, while the other types use over-bearing bridges. The enclosed corridor for conveying concrete aggregates in large mixing plants is a common type of bridge structure.

[0003] The existing enclosed corridors for transporting concrete and aggregates in large-scale mixing plants lack expansion joint structures, which makes these corridors prone to thermal stress under high temperatures, thus affecting the overall structural strength and service life of the trestle bridge.

[0004] Prior art 1 (Chinese patent application number CN201520640450.7, application date 2015-08-24) discloses a material conveying trestle expansion joint. A rubber waterstop is fixedly installed at the bottom of the material conveying trestle expansion joint between the upper and lower reinforced concrete bottom layers. One end of the rubber waterstop is fixedly cast in the upper reinforced concrete bottom layer, and the other end is fixedly cast in the lower reinforced concrete bottom layer. An asphalt hemp fiber filling layer is filled in the material conveying trestle expansion joint above the rubber waterstop. This maintains the function of the expansion joint and also solves the sealing problem of the expansion joint. The construction is simple and easy, and the cost is low.

[0005] Prior art 2 (Chinese patent application number CN202020343166.4, application date 2020-03-18) discloses a leak-proof expansion joint structure for conveyor trestle bridges. It uses a waterstop to flexibly connect the upper and lower trestle bridges, eliminating the thermal expansion and contraction of the steel structure. A polymer sealant layer is applied to the waterstop to improve the leak-proof performance of the expansion joint. A concrete surface layer is then applied to the polymer sealant layer to protect the waterstop and the polymer sealant layer from wear. This invention, a leak-proof expansion joint structure for conveyor trestle bridges, solves the problem of severe water leakage due to cracks between trestle bridges. This invention has a simple structure, good leak-proof performance, and can be used for leak-proof expansion joints between conveyor trestle bridges.

[0006] While existing technologies have solved the stress changes caused by temperature on the trestle, the fixed sealing structure at the expansion joints prevents them from automatically adjusting to temperature. As a result, the expansion joints can only serve a sealing function and cannot help regulate the temperature inside the trestle, which presents certain practical drawbacks. Summary of the Invention

[0007] The purpose of this invention is to provide a closed corridor for conveying concrete and aggregate in large-scale mixing plants, in order to solve the problem mentioned in the background art that although the closed corridors for conveying concrete and aggregate in large-scale mixing plants on the market have solved the stress changes caused by the temperature of the trestle, the sealing structure at the expansion joint is fixed and cannot be automatically adjusted according to the temperature. As a result, the expansion joint can only play a sealing role and cannot help to achieve temperature regulation inside the trestle.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a closed corridor for conveying concrete aggregate in a large mixing plant, comprising a support frame fixedly installed above the ground, a lower support fixedly installed at the upper end of the support frame, a patterned steel plate fixedly installed on the upper surface of the lower support, a conveyor belt fixedly installed at the upper end of the patterned steel plate, and an external steel structure truss fixedly installed above the lower support and the patterned steel plate via positioning and fixing supports, and a color steel plate fixedly installed on the outer side of the external steel structure truss;

[0009] It also includes: a pedestrian walkway, which is fixedly installed on a checkered steel plate for workers to walk on and carry out maintenance;

[0010] An expansion joint mechanism is installed between two adjacent sections of the trestle to ensure that the trestle can undergo stable heat shrinkage. The expansion joint mechanism includes two fixed frames that are respectively fixedly installed on the outside of the two sections of the trestle. The fixed frames are fixedly connected by bolts, a lower bracket, and an external steel structure truss. A waterproof film is connected between the two fixed frames.

[0011] The guide assembly is installed between two fixed frames.

[0012] Preferably, the support frame is located below the connection between the two end trestle bridges, and the top and lower support beams of the support frame are fixedly connected, and the lower support beams are fixedly connected to the base of the conveyor belt machine.

[0013] By adopting the above technical solution, it can be ensured that the support frame provides stable support to the lower support, and the lower support can provide stable support to the conveyor belt through its longitudinal beams, thus ensuring the overall structural support strength.

[0014] Preferably, the positioning and fixing support is arranged in an "L" shape, and the positioning and fixing support is evenly provided with mounting holes, which are elliptical in shape. At the same time, bolts pass through the mounting holes to connect the lower support, the patterned steel plate and the external steel structure truss.

[0015] By adopting the above technical solution, the positioning and fixing support can stably support the installation of the external steel structure truss, and the elliptical mounting holes on the positioning and fixing support can provide movement space for the bolts, so as to eliminate the temperature stress generated by the external steel structure truss due to temperature changes.

[0016] Preferably, the patterned steel plate and the color steel plate are sealed together, and the patterned steel plate and the color steel plate of adjacent trestle bridges are sealed together by an expansion joint mechanism.

[0017] By adopting the above technical solutions, the entire trestle is kept sealed, avoiding the impact of weather on the humidity of the transported materials, and preventing the transported materials from falling from a height, thus improving the safety of the equipment.

[0018] Preferably, the guide assembly includes a telescopic guide plate fixedly installed on the left fixed frame and a telescopic guide seat installed on the right fixed frame. The inner side of the telescopic guide seat is provided with a sliding groove, and the telescopic guide plate is inserted into the inner side of the telescopic guide seat to form a telescopic structure with the telescopic guide seat.

[0019] By adopting the above technical solution, when the trestle changes size due to temperature changes during use, the telescopic guide plate can slide along the telescopic guide seat, thereby reducing the temperature stress at the trestle connection.

[0020] Preferably, buffer springs are uniformly and fixedly connected between the telescopic guide seat and the telescopic guide plate, and the telescopic guide plate forms an elastic telescopic structure through the buffer springs and the telescopic guide seat.

[0021] By adopting the above technical solution, the buffer spring plays a buffering role when the telescopic guide seat and telescopic guide plate are adjusted for extension and retraction.

[0022] Preferably, the expansion joint mechanism further includes a first adjustable film fixedly bonded to the side of the left fixed frame and a second adjustable film bonded to the side of the right fixed frame, wherein the first adjustable film and the second adjustable film are both attached to the waterproof film to achieve a sealing fit, and the ends of the first adjustable film and the second adjustable film that are close to each other overlap and hook each other.

[0023] By adopting the above technical solution, when the trestle shrinks in a low-temperature environment, the waterproof film and the first and second adjustable films can all be elastically stretched, and the overlapping hook structure of the first and second adjustable films can prevent the splicing of the two from breaking.

[0024] Preferably, the expansion joint mechanism further includes a first rotating component and a second rotating component rotatably mounted on the outer sides of the left and right fixed frames, respectively. The first rotating component and the second rotating component are fixedly bonded to the middle positions of the first adjustable film and the second adjustable film, respectively. At the same time, an adjustment magnetic sheet is fixedly bonded between the lower surface of the first rotating component and the upper surface of the second rotating component. Moreover, the magnetic poles of the opposite faces of the two adjustment magnetic sheets are opposite. When the first rotating component and the second rotating component are close together, they will rotate under the magnetic force of the two adjustment magnetic sheets, so as to drive the first adjustable film and the second adjustable film to disengage and achieve deformation separation.

[0025] By adopting the above technical solution, when the temperature is too high, the first rotating component and the second rotating component will gradually approach each other, so that they will rotate under the action of magnetic force, thereby driving the first adjustable film and the second adjustable film to separate, so that the air flow inside the bridge can be accelerated through the openings of the two components, thereby achieving a certain degree of cooling.

[0026] The advantages and beneficial effects of this invention are as follows:

[0027] 1. The enclosed corridor for conveying concrete aggregates in a large mixing plant of the present invention can provide stable support and protection for the conveyor belt. The enclosed structure can improve the safety during the conveying process, while the positioning and fixing supports and expansion joint mechanism can reduce the stress changes of the trestle bridge caused by temperature changes, further improving the structural stability of the trestle bridge.

[0028] 2. The large-scale concrete mixing plant's enclosed conveyor corridor for transporting aggregates and sand is equipped with positioning and fixing supports, mounting holes, and an external steel truss. By passing bolts through the mounting holes and fixing them to the lower support and the external steel truss, the positioning and fixing supports can provide stable support for the external steel truss, ensuring the installation stability of the color steel plate. The elliptical mounting holes can eliminate the temperature stress generated by the truss due to temperature changes.

[0029] 3. The large-scale concrete and aggregate conveying enclosed corridor of the present invention is equipped with a fixed frame and a waterproof film. The two sections of the trestle can be spliced ​​and assembled. When the trestle is affected by temperature and stress changes, the fixed frame can drive the waterproof film to shrink and stretch. At this time, the waterproof film, the first adjustable film, and the second adjustable film can complete the sealing of the trestle assembly point.

[0030] 4. The enclosed corridor for conveying concrete aggregate in a large-scale mixing plant of the present invention is equipped with a first adjustable sheet, a second adjustable sheet, a first rotating component, a second rotating component, and a regulating magnetic sheet. When the ambient temperature of the trestle is too high, the first rotating component and the second rotating component will move closer to each other. When the two regulating magnetic sheets are close, the first rotating component and the second rotating component will rotate elastically under the action of magnetic force, thereby pulling the first adjustable sheet and the second adjustable sheet to release their erection, so that the two deform and separate, realizing the opening operation of the expansion joint mechanism, thereby promoting the air flow inside and outside the trestle, realizing the temperature control and regulation inside the trestle, and avoiding the expansion joint mechanism being limited by the expansion limit.

[0031] 5. The large-scale concrete mixing plant's enclosed conveyor corridor for transporting aggregates is equipped with color steel plates and fixed frames. The color steel plates and fixed frames can enclose the trestle, thereby reducing the noise impact generated by the conveying equipment inside the trestle. At the same time, the enclosed structure can protect the conveying equipment and the conveyed materials, achieving the purpose of rain and wind protection, so that the equipment can work in different weather environments. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the present invention from a bottom view;

[0034] Figure 3 This is a schematic cross-sectional view of the present invention;

[0035] Figure 4 This is a schematic diagram of the installation structure of the positioning and fixing support of the present invention;

[0036] Figure 5 This is a schematic diagram of the fixed frame installation structure of the present invention;

[0037] Figure 6 This is a schematic diagram of the connection structure between the telescopic guide seat and the telescopic guide plate of the present invention;

[0038] Figure 7 This is a schematic cross-sectional view of the fixed frame structure of the present invention;

[0039] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle;

[0040] Figure 9 This is a schematic diagram of the connection structure of the waterproof film, the first adjustable film, and the second adjustable film of the present invention.

[0041] In the diagram: 1. Support frame; 2. Lower support; 3. Patterned steel plate; 4. Belt conveyor; 5. Positioning and fixing support; 501. Mounting hole; 6. External steel structure truss; 7. Color steel plate; 8. Pedestrian walkway; 9. Fixing frame; 10. Telescopic guide seat; 11. Slide groove; 12. Telescopic guide plate; 13. Buffer spring; 14. Waterproof film; 15. First adjustable film; 16. Second adjustable film; 17. First rotating component; 18. Second rotating component; 19. Adjustment magnetic plate. Detailed Implementation

[0042] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0043] Example 1: Please refer to Figures 1-3As shown, the lower support 2 and the external steel truss 6 of the existing large-scale concrete mixing plant's enclosed conveying corridor for concrete and aggregate are mostly directly connected by bolts, which makes the connection prone to temperature stress changes due to temperature variations, thus affecting the structural stability of the device. In order to solve this technical problem, this embodiment discloses the following technical content.

[0044] A large-scale concrete mixing plant with enclosed conveyor corridor for transporting aggregates includes a support frame 1 fixedly installed above the ground. A lower support 2 is fixedly installed at the upper end of the support frame 1, and a patterned steel plate 3 is fixedly installed on the upper surface of the lower support 2. A conveyor belt 4 is fixedly installed at the upper end of the patterned steel plate 3. An external steel structure truss 6 is fixedly installed above the lower support 2 and the patterned steel plate 3 through positioning and fixing supports 5. A color steel plate 7 is fixedly installed on the outer side of the external steel structure truss 6.

[0045] It also includes: a pedestrian walkway 8, which is fixedly installed on the checkered steel plate 3 for workers to walk and inspect; a support frame 1 located below the connection of the two end trestle bridges, and the top and lower support beams of the support frame 1 are fixedly connected, and the lower support beams of the lower support beams are fixedly connected to the base of the conveyor belt 4.

[0046] The positioning and fixing support 5 is set in an "L" shape, and the positioning and fixing support 5 is evenly provided with mounting holes 501, which are elliptical in shape. At the same time, bolts pass through the mounting holes 501 to connect the lower support 2, the patterned steel plate 3 and the external steel structure truss 6.

[0047] By adopting the above technical solution, the support frame 1 can provide stable support for the lower supports 2 of the two adjacent sections of the trestle. The longitudinal beams of the lower supports 2 are fixedly connected to the base of the conveyor belt 4, so that the support frame 1 can provide stable support for the conveyor belt 4 through the lower supports 2, ensuring the installation stability of the conveyor belt 4. The lower supports 2 and the checkered steel plate 3 are fixedly connected to the external steel structure truss 6 through the positioning and fixing supports 5, which can ensure the installation stability of the external steel structure truss 6. At the same time, the mounting holes 501 opened on the positioning and fixing supports 5 are elliptical, so that the bolts can be adjusted along the mounting holes 501 when temperature changes occur, thereby eliminating the temperature stress generated by the external steel structure truss 6 with temperature changes, further ensuring the structural stability of the trestle. At the same time, the use of a closed corridor structure can effectively reduce the noise impact during the operation of the conveying equipment, achieving effective noise reduction. In addition, the closed structure can effectively prevent rain and wind, avoiding the impact of the external environment on the normal conveying of materials.

[0048] Example 2: The technical content disclosed in this example is a further improvement based on Example 1. While existing enclosed corridors for conveying concrete aggregates in large-scale mixing plants have some expansion joint adjustment capabilities, their expansion joint structures are simple and cannot assist in temperature control within the trestle bridge under high-temperature conditions. To further solve this technical problem, this example discloses the following technical content: Figure 2 and Figures 5-9 As shown;

[0049] An expansion joint mechanism is installed between two adjacent sections of the trestle to ensure that the trestle can undergo stable heat shrinkage. The expansion joint mechanism includes two fixed frames 9 that are fixedly installed on the outside of the two sections of the trestle. The fixed frames 9 are fixedly connected by bolts, a lower bracket 2, and an external steel truss 6. A waterproof film 14 is connected between the two fixed frames 9.

[0050] A guide assembly is installed between two fixed frames 9;

[0051] The patterned steel plate 3 and the color steel plate 7 are sealed together, and the patterned steel plate 3 and the color steel plate 7 of adjacent trestle bridges are sealed together through an expansion joint mechanism.

[0052] The guide assembly includes a telescopic guide plate 12 fixedly installed on the left fixed frame 9 and a telescopic guide seat 10 installed on the right fixed frame 9. The inner side of the telescopic guide seat 10 is provided with a sliding groove 11, and the telescopic guide plate 12 is inserted into the inner side of the telescopic guide seat 10 and forms a telescopic structure with the telescopic guide seat 10.

[0053] A buffer spring 13 is uniformly fixedly connected between the telescopic guide seat 10 and the telescopic guide plate 12, and the telescopic guide plate 12 forms an elastic telescopic structure with the buffer spring 13 and the telescopic guide seat 10.

[0054] The expansion joint mechanism also includes a first adjustable film 15 fixedly bonded to the side of the left fixed frame 9 and a second adjustable film 16 fixedly bonded to the side of the right fixed frame 9. Both the first adjustable film 15 and the second adjustable film 16 are attached to the waterproof film 14 to achieve a sealing fit. The ends of the first adjustable film 15 and the second adjustable film 16 that are close to each other overlap and hook each other.

[0055] The expansion joint mechanism also includes a first rotating component 17 and a second rotating component 18, which are respectively rotatably installed on the outside of the left and right fixed frames 9. The first rotating component 17 and the second rotating component 18 are fixedly bonded to the middle positions of the first adjustable film 15 and the second adjustable film 16, respectively. At the same time, an adjustment magnetic sheet 19 is fixedly bonded between the lower surface of the first rotating component 17 and the upper surface of the second rotating component 18. Moreover, the magnetic poles of the opposite faces of the two adjustment magnetic sheets 19 are opposite. When the first rotating component 17 and the second rotating component 18 are close together, they will rotate under the magnetic force of the two adjustment magnetic sheets 19, so as to drive the first adjustable film 15 and the second adjustable film 16 to disengage and achieve deformation separation.

[0056] By adopting the above technical solution, when the external temperature decreases and the distance between the two sections of the bridge increases, the two fixed frames 9 will move away from each other. At this time, the telescopic guide plate 12 will slide inside the telescopic guide seat 10, causing the waterproof film 14 to elastically stretch. At the same time, the first adjustable film 15 and the second adjustable film 16 will also elastically stretch because their overlapping ends are hooked together, thus ensuring the sealing effect between the two fixed frames 9. When the temperature rises, the two fixed frames 9 will gradually move closer, and the telescopic guide plate 12 will slide inside the telescopic guide seat 10 and compress the buffer spring 13. When the external temperature is too high, the first rotating part 17 and the second rotating part 18 will move closer together, causing the waterproof film 14 to elastically stretch. The adjustment magnetic plates 19 on both sides are close to each other, so that the first rotating part 17 and the second rotating part 18 rotate elastically under the action of magnetic force, thereby pulling the first adjustable film 15 and the second adjustable film 16 to deform and release the overlapping state. At this time, there is an opening between the first adjustable film 15 and the second adjustable film 16, allowing outside air to flow into the trestle, preventing the temperature inside the trestle from rising continuously, realizing ventilation inside the trestle, thereby reducing the temperature inside the trestle and achieving automatic and effective cooling. Furthermore, water sprinkler pipes can be installed on the outside of the steel structure truss 6 of the trestle, and atomizing nozzles can be used to spray dust to ensure the working environment inside the trestle, and the spray can further cool the inside of the trestle.

[0057] Although the embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the invention and the appended claims. Therefore, the scope of the invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A closed corridor for conveying concrete aggregate in a large mixing plant, comprising a support frame (1) fixedly installed above the ground, wherein a lower support (2) is fixedly installed at the upper end of the support frame (1), and a patterned steel plate (3) is fixedly installed on the upper surface of the lower support (2), and a conveyor belt (4) is fixedly installed at the upper end of the patterned steel plate (3). Meanwhile, an external steel structure truss (6) is fixedly installed above the lower support (2) and the patterned steel plate (3) through a positioning and fixing support (5), and a color steel plate (7) is fixedly installed on the outer side of the external steel structure truss (6). Its features are, Also includes: The pedestrian walkway (8) is fixedly installed on the patterned steel plate (3) for staff to walk on and carry out maintenance. The expansion joint mechanism is installed between two adjacent sections of the trestle to ensure that the trestle can undergo stable heat shrinkage. The expansion joint mechanism includes two fixed frames (9) that are fixedly installed on the outside of the two sections of the trestle. The fixed frames (9) are fixedly connected by bolts, a lower bracket (2), and an external steel truss (6). A waterproof film (14) is connected between the two fixed frames (9). The guide assembly is installed between two fixed frames (9); The guide assembly includes a telescopic guide plate (12) fixedly installed on the left fixed frame (9) and a telescopic guide seat (10) installed on the right fixed frame (9). The inner side of the telescopic guide seat (10) is provided with a sliding groove (11), and the telescopic guide plate (12) is inserted into the inner side of the telescopic guide seat (10) and forms a telescopic structure with the telescopic guide seat (10). The expansion joint mechanism also includes a first adjustable film (15) fixedly bonded to the side of the left fixed frame (9) and a second adjustable film (16) bonded to the side of the right fixed frame (9). The first adjustable film (15) and the second adjustable film (16) are both attached to the waterproof film (14) to achieve a sealing fit. The ends of the first adjustable film (15) and the second adjustable film (16) that are close to each other overlap and hook each other. The expansion joint mechanism also includes a first rotating component (17) and a second rotating component (18) respectively rotatably installed on the outside of the left and right fixed frames (9). The first rotating component (17) and the second rotating component (18) are fixedly bonded to the middle positions of the first adjustable film (15) and the second adjustable film (16) respectively. At the same time, control magnetic sheets (19) are fixedly bonded between the lower surface of the first rotating component (17) and the upper surface of the second rotating component (18). Moreover, the magnetic poles of the opposite surfaces of the two control magnetic sheets (19) are opposite. When the first rotating component (17) and the second rotating component (18) are close together, they will rotate under the magnetic force of the two control magnetic sheets (19) to drive the first adjustable film (15) and the second adjustable film (16) to detach from the overlap and achieve deformation separation.

2. The enclosed conveyor corridor for concrete aggregate transportation in a large-scale mixing plant according to claim 1, characterized in that: The support frame (1) is located below the connection of the two end trestle bridges, and the top and lower support (2) longitudinal beams of the support frame (1) are fixedly connected, and the lower support (2) longitudinal beams are fixedly connected to the base of the conveyor belt (4).

3. The enclosed corridor for conveying concrete aggregates in a large-scale mixing plant according to claim 1, characterized in that: The positioning and fixing support (5) is set in an "L" shape, and the positioning and fixing support (5) is evenly provided with mounting holes (501), and the mounting holes (501) are set in an elliptical shape. At the same time, the bolts pass through the mounting holes (501) to connect the lower support (2), the patterned steel plate (3) and the external steel structure truss (6).

4. The enclosed conveyor corridor for concrete aggregate transportation in a large-scale mixing plant according to claim 1, characterized in that: The patterned steel plate (3) and the color steel plate (7) are sealed together, and the patterned steel plate (3) and the color steel plate (7) of adjacent trestle bridges are sealed together through an expansion joint mechanism.

5. The enclosed conveyor corridor for concrete aggregate transportation in a large-scale mixing plant according to claim 1, characterized in that: A buffer spring (13) is uniformly fixedly connected between the telescopic guide seat (10) and the telescopic guide plate (12), and the telescopic guide plate (12) forms an elastic telescopic structure through the buffer spring (13) and the telescopic guide seat (10).

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