Dump truck unloading aggregate separation prevention device and method for roller compacted concrete construction

Abstract

The invention discloses a dump truck unloading aggregate separation prevention device and method for roller compacted concrete construction, and belongs to the technical field of concrete construction. The invention relates to a dump truck unloading aggregate separation prevention device for roller compacted concrete construction. The dump truck unloading aggregate separation prevention device comprises a material guide assembly which is assembled at the tail part of a carriage and is used for reducing the unloading height difference. According to the device, aggregate separation is effectively prevented, by additionally arranging the device, the discharging height difference is reduced, the aggregate separation phenomenon of the three-graded roller compacted concrete is remarkably reduced, and the uniformity of the concrete is improved; the influence of aggregate separation on the compactness and strength of the roller compacted concrete is avoided, and the engineering quality is ensured; the device is simple in structure and convenient to operate, and extra manual intervention is not needed; and the method is suitable for various hydraulic and hydro-power engineering roller compacted concrete construction scenes, and has wide popularization and application values.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete construction, and particularly to a device and method for preventing aggregate segregation during the unloading of a dump truck used in roller compacted concrete construction. Background Art

[0002] In the construction of roller compacted concrete for water conservancy and hydropower projects, a dump truck is a commonly used unloading tool. However, due to the relatively high unloading height of the dump truck, the three - graded roller compacted concrete is prone to aggregate segregation during the dumping process due to the large drop height. Aggregate segregation will lead to a decrease in the uniformity of the concrete, affecting the compactness and strength of the roller compacted concrete, and thus affecting the project quality.

[0003] Currently, common solutions include: 1) reducing the unloading height of the dump truck, but it is difficult to achieve due to vehicle structure and construction conditions; 2) setting a buffer device at the unloading point, but this increases the construction complexity and cost; 3) using manual intervention, such as using tools to disperse the aggregates, but the efficiency is low and the effect is limited. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem of aggregate segregation caused by excessive height difference during the unloading of a dump truck in the construction of roller compacted concrete in the prior art, and to propose a device and method for preventing aggregate segregation during the unloading of a dump truck used in roller compacted concrete construction.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A device and method for preventing aggregate segregation during the unloading of a dump truck used in roller compacted concrete construction, including: a material guiding component assembled at the rear of the carriage to reduce the unloading height difference.

[0006] In some embodiments, the material guiding component is: a swing plate hinged at the rear end of the carriage; During transportation, the swing plate presses against the outside of the carriage door to lock the carriage door; during unloading, the swing plate swings to release the carriage door and forms an extended material guiding structure.

[0007] In some embodiments, the lower end of the swing plate is provided with a chain connected to the vehicle frame; During transportation, the chain is in a taut state, pulling the swing plate to swing inward; During unloading, the chain becomes loose, and the swing plate swings outward under the action of gravity.

[0008] In some embodiments, an articulated seat is arranged inside the lower end of the swing plate for rotational assembly with the rear end of the carriage; a pin shaft seat is arranged above the articulated seat to connect one end of the chain.

[0009] In some embodiments, self - adjusting retaining edges are arranged at positions of the swing plate near both ends.

[0010] In some embodiments, inner folding stops are provided at both ends of the swing plate.

[0011] In some embodiments, the material guiding assembly is a material guiding plate assembled at the rear of the carriage and extending backward.

[0012] In some embodiments, a pick-up weir is provided at the tail end of the material guiding plate.

[0013] In some embodiments, an extension plate is slidably arranged at the lower end of the material guiding plate.

[0014] A method for preventing aggregate separation during unloading of a dump truck for roller compacted concrete construction, based on the above device, includes the following steps; S1. Install a material guiding assembly at the rear of the carriage; S2. During the unloading process, reduce the unloading height difference of the concrete through the material guiding assembly to avoid aggregate separation caused by too large a height difference.

[0015] Compared with the prior art, the present invention provides a device and method for preventing aggregate separation during unloading of a dump truck for roller compacted concrete construction, having the following beneficial effects.

[0016] 1. The present invention effectively prevents aggregate separation: By installing this device, the unloading height difference is reduced, significantly reducing the aggregate separation phenomenon of three-stage graded roller compacted concrete and improving the uniformity of the concrete.

[0017] 2. The present invention improves the construction quality: It avoids the influence of aggregate separation on the compactness and strength of roller compacted concrete, ensuring the project quality.

[0018] 3. The present invention is easy to operate: The device has a simple structure and is convenient to operate without additional manual intervention.

[0019] 4. The present invention has a wide range of applications: It is applicable to various roller compacted concrete construction scenarios in water conservancy and hydropower projects and has broad popularization and application value.

[0020] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification; and to some extent, based on the study of the following text, they will be obvious to those skilled in the art; or, they can be learned from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the transportation state of Embodiment 1.

[0022] Figure 2 It is a partial enlarged view of the transportation state of Embodiment 1.

[0023] Figure 3Schematic diagram of the discharging state of Example 1.

[0024] Figure 4 Partial enlarged schematic diagram of the discharging state of Example 1.

[0025] Figure 5 Schematic diagram of the transportation state of Example 2.

[0026] Figure 6 Partial enlarged view of the transportation state of Example 2.

[0027] Figure 7 Schematic diagram of the discharging state of Example 2.

[0028] Figure 8 Partial enlarged view of the discharging state of Example 2.

[0029] Figure 9 Schematic diagram of the transportation state of Example 3.

[0030] Figure 10 Partial enlarged view of the transportation state of Example 3.

[0031] Figure 11 Schematic diagram of the discharging state of Example 3.

[0032] Figure 12 Partial enlarged view of the discharging state of Example 3.

[0033] Figure 13 Second structural schematic diagram of the swing plate.

[0034] Figure 14 Rear view of the second structure of the swing plate.

[0035] Figure 15 Side view of the second structure of the swing plate.

[0036] Figure 16 Schematic diagram of the discharging state of the second structure of the swing plate.

[0037] Figure 17 Side view of the discharging state of the second structure of the swing plate.

[0038] Figure 18 Third structural schematic diagram of the swing plate.

[0039] Figure 19 Structural schematic diagram of the material guide plate.

[0040] Figure 20 Schematic diagram of the lower side structure of the material guide plate.

[0041] Figure 21 Second structural schematic diagram of the material guide plate.

[0042] Figure 22 It is the second structural side view of the material guide plate.

[0043] Figure 23 It is the third structural schematic diagram of the material guide plate.

[0044] Figure 24 It is the extended state diagram of the third structure of the material guide plate.

[0045] Figure 25 It is the bottom view of the third structure of the material guide plate.

[0046] Figure 26 It is Figure 25 The enlarged structural schematic diagram at position A in

[0047] Figure 27 It is the schematic diagram of the transportation state of the fifth embodiment.

[0048] Figure 28 It is the schematic diagram of the discharging state of the fifth embodiment.

[0049] In the figure: 1. Swing plate; 11. Inner folding block; 2. Chain; 3. Hinge seat; 31. Pin shaft seat; 4. Retaining edge; 5. Material guide plate; 51. Panel; 52. Connecting rod; 53. Baffle; 54. Picking channel; 6. Extension plate; 61. Slide bar; 62. Slideway. Specific embodiments

[0050] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0051] Referring to Figure 1-28 , a self-unloading truck discharging anti-aggregate separation device for roller compacted concrete construction includes: a material guiding component assembled at the tail of the carriage to reduce the discharging height difference; by forming an extended discharging guiding path through the material guiding component, the discharging height difference is reduced, thereby effectively solving the problem of aggregate separation of roller compacted concrete during the discharging process.

[0052] Embodiment 1.

[0053] Referring to Figure 1-4 ; the material guiding component is: a swing plate 1 hinged at the tail end of the carriage.

[0054] As Figure 1 , 2 shown, during the transportation process, when the carriage is in a horizontal state, the swing plate 1 is in a retracted state, pressing against the outside of the carriage door and locking the carriage door, without affecting the normal driving and loading of the self-unloading truck.

[0055] As Figure 3 , 4As shown, during the unloading process, when the carriage is in the tilted-up state, the swing plate 1 swings backward, releasing the lower end of the carriage door and forming an extended material guiding structure; guiding the concrete flow towards the unloading point and further reducing the unloading height difference.

[0056] In Figure 3 , 4 the state shown; the swing plate 1 is closer to the ground relative to the rear end of the carriage; the concrete flows towards the unloading point through the swing plate 1, significantly avoiding aggregate separation.

[0057] Preferably, the swing plate 1 is assembled through the hinge connection structure of the carriage door claw.

[0058] It can be understood that a door claw mounting structure is provided at the position below the rear end of the carriage; the swing plate 1 is assembled using the original hinge connection structure of the door claw; thus, the swing plate 1 can replace the door claw to limit and lock or release the carriage door.

[0059] Correspondingly, a chain 2 is provided at the lower end of the swing plate 1 and connected to the vehicle frame; and the connection point of the chain and the swing plate 1 is above the "hinge position between the swing plate 1 and the rear end of the carriage" (in the up and down height orientation in the retracted state).

[0060] During transportation, the chain 2 is in a taut state, pulling the swing plate 1 to swing inward; during unloading, the chain 2 becomes loose, and the swing plate 1 swings outward under the action of gravity.

[0061] As Figure 2 shown; during transportation, the entire carriage is in a horizontal state; the distance between the rear end of the carriage and the fixed point of the chain on the rear end of the frame is large, the chain 2 is taut, pulling the swing plate 1 against the carriage door.

[0062] As Figure 4 shown; during unloading, the front end of the carriage is lifted, the distance between the rear end of the carriage and the fixed point of the chain on the rear end of the frame is reduced, the chain 2 becomes loose and no longer forms a pulling force on the swing plate 1; at the same time, the swing plate 1 swings backward and opens under the action of gravity, forming a guiding structure for the concrete material, and the concrete slides off its surface, reducing the height difference.

[0063] In the specific structural setting: a hinge seat 3 is provided on the inner side of the lower end of the swing plate 1 for rotational assembly with the rear end of the carriage; a pin shaft seat 31 is provided above the hinge seat 3 to connect one end of the chain 2.

[0064] It should be noted that the inner side of the lower end of the swing plate 1 abuts against the lower end of the carriage or the hinge connection structure of the door claw; restricting the rotation amplitude of the swing plate 1 and forming an effective material guiding path.

[0065] During unloading: As the carriage is lifted and tilted, the distance between the rear end of the carriage and the chain fixing point at the rear end of the dump truck frame decreases, and the chain 2 pulling the swing plate 1 naturally loosens. The swing plate 1 opens, extending the material discharge path and reducing the discharge height difference. When the deflector is fully opened, the extended part at the lower part of the swing plate 1 abuts against the carriage structure to prevent the swing plate 1 from opening excessively and losing its guiding function.

[0066] After unloading: As the carriage gradually returns to the horizontal state during its descent, the distance between the rear end of the carriage and the chain fixing point at the rear end of the dump truck frame increases, and the chain 2 pulling the swing plate 1 is naturally tightened, pulling up the swing plate 1 and locking the carriage door.

[0067] Furthermore, reinforcing ribs are provided at the rear side of the swing plate 1 to prevent the deflector from being deformed and damaged.

[0068] It should be further noted that the swing plate 1 can also be directly welded to the carriage door claw; the swing plate 1 and the door claw are connected and integrated into an integral structure and installed at the original carriage door claw. At this time, attention should be paid to the fitting of the swing plate 1 and the carriage door; preferably, a door claw clamping position is cut at the corresponding position of the swing plate 1 and the door claw; then, the swing plate 1 and the door claw are welded, and the front end of the swing plate 1 is on the same plane as the door claw structure, attaching to the carriage door.

[0069] Furthermore, as Figure 13-17 shown; Self-adjusting retaining edges 4 are provided at positions of the swing plate 1 near both ends.

[0070] Thus, barriers are formed on both sides to reduce the outflow of concrete from the sides.

[0071] Preferably, the retaining edge 4 is triangular; the position of the retaining edge 4 near the top is assembled with the swing plate 1 through a pin shaft; correspondingly, a long strip-shaped groove is formed on the swing plate 1 for the swing plate 1 to swing through.

[0072] During transportation, the retaining edge 4 is subjected to the pressure of the carriage door, and the lower end swings backward, not affecting the locking of the carriage door by the swing plate 1. During unloading, the swing plate 1 swings downward as a whole; due to the influence of gravity, the retaining edge 4 will swing downward; to overcome this state, a force-applying structure for the retaining edge 4 is correspondingly provided.

[0073] Preferably, structures such as torsion springs and spring steel strips are provided at the assembly position of the retaining edge 4 to apply a force for the retaining edge 4 to swing inward; during unloading, the retaining edge 4 is pushed to form Figure 16 the state shown.

[0074] It can be understood that a limiting structure also needs to be provided; for example, a convex structure is provided at the outer side position of the lower end of the retaining edge 4; the convex structure is larger than the width of the long strip-shaped groove on the swing plate 1 to limit the swing amplitude in the force-applying state.

[0075] In some other embodiments, different from the foregoing states, inner folding stoppers 11 are provided at both ends of the swing plate 1 to form side stoppers. At the same time, the swing plate 1 and the inner folding stoppers 11 form a chute to ensure that the aggregate will not be overly dispersed during unloading, further preventing segregation.

[0076] As Figure 18 shown; inner folding stoppers 11 are hingedly provided at both ends of the swing plate 1. At the same time, structures such as torsion springs and spring steel bars are provided to apply an inner folding force to the inner folding stoppers 11, and the angle between the inner folding stoppers 11 and the swing plate 1 is controlled to be greater than 90 degrees.

[0077] During unloading, the inner folding stoppers 11 on both sides form retaining edges. When the swing plate 1 is retracted, under the pressure of the carriage door, the inner folding stoppers 11 swing outwards without affecting the locking of the swing plate 1 to the carriage door.

[0078] During operation: 1), Install a swing plate at the rear of the dump truck carriage; 2), After the dump truck is loaded, drive to the unloading point; as the carriage is lifted and tilted, the swing plate opens; 3), Start unloading, and the concrete flows through the swing plate to the unloading point to avoid the separation of the aggregate caused by too large a height difference; 4), After unloading is completed, as the carriage gradually returns to the horizontal state as it drops, the swing plate is pulled up to lock the carriage door, and the dump truck drives away from the unloading point.

[0079] Embodiment Two.

[0080] As Figure 5-8 , shown in FIGS. 19 - 20, different from the foregoing embodiment: The material guiding assembly is: a material guiding plate 5 assembled at the rear of the carriage and extending rearward.

[0081] Thus, a fixed - shaped outer edge is directly formed by the material guiding plate 5. As Figure 8 shown, the material guiding plate 5 guides the concrete to fall, reducing the height.

[0082] It should be noted that the length of the material guiding plate 5 should be reasonably controlled; while effectively reducing the falling height, it does not cause excessive changes to the vehicle body. Preferably, the material guiding plate 5 extends 500 mm out of the rear of the vehicle.

[0083] Specifically, the material guiding plate 5 includes: a panel 51 and a frame supporting the panel 51, having reliable strength. At the same time, multiple connecting rods 52 are provided on both sides of the material guiding plate 5 and are assembled and connected to the carriage.

[0084] Preferably, the connecting rods 52 are fixed to the carriage by welding or bolt - connection methods.

[0085] It should be noted that the front end of the material guiding plate 5 fits against the tail of the carriage to prevent material leakage; at the same time, a notch for avoiding the carriage door claws is provided at the front end of the material guiding plate 5 to ensure that the door claws can be opened smoothly.

[0086] Furthermore, baffles 53 are provided on both sides of the material guiding plate 5.

[0087] During unloading, the material guiding plate 5 and the baffles 53 form a chute to ensure that the aggregate is not overly dispersed during unloading, further preventing segregation.

[0088] Before unloading: The material guiding plate 5 is installed at the tail of the dump truck carriage, without affecting the normal driving and loading of the dump truck; since it is extended by a certain part, the driver needs to pay more attention to driving safety during the driving process.

[0089] During unloading: The material guiding plate 5 extends the concrete discharging path, effectively reducing the discharging height difference of the concrete; the material guiding plate 5 and the baffles 53 form a chute. After the dump truck carriage is lifted, the carriage door is opened, and the concrete falls along the chute to the designated discharging point.

[0090] During operation: 1), Install this material guiding component at the tail of the dump truck carriage; 2), After the dump truck is loaded and travels to the discharging point, as the carriage is lifted and tilted, the carriage door is opened and unloading begins; the concrete flows through the material guiding component to the discharging point, avoiding aggregate separation caused by too large a height difference and too fast a discharging speed; 3), After unloading is completed, as the carriage falls and gradually returns to the horizontal state, the door is closed, and the dump truck drives away from the discharging point.

[0091] Embodiment Three.

[0092] As Figure 9-12 , shown in FIGS. 21-22, different from the foregoing embodiments: a picket 54 is provided at the tail end of the material guiding plate 5.

[0093] Preferably, the height of the picket 54 is set to 50 - 70 mm.

[0094] More preferably, the height of the picket 54 is set to 60 mm.

[0095] By forming a 60 - mm - high picket at the tail end of the material guiding plate 5, it plays a buffering role during unloading, can reduce the concrete discharging speed, and further prevent segregation.

[0096] During unloading: The picket 54 at the end of the panel of the material guiding plate 5 effectively reduces the concrete falling speed and prevents aggregate segregation caused by the impact force brought by too fast a falling speed.

[0097] Embodiment Four.

[0098] AsFigure 23-26 As shown, different from the foregoing embodiments, an extension plate 6 is slidably provided at the lower end of the material guide plate 5.

[0099] Among them, the extension plate 6 has a first form that is received in the lower end of the material guide plate 5 and a second state that slides to the outside to form an extension.

[0100] During transportation, the extension plate 6 is received inside; as Figure 23 shown, the overall length is not large.

[0101] During the unloading process, the extension plate 6 is moved outwards to increase the guiding surface and further reduce the height difference.

[0102] It should be noted that the extension plate 6 can be manually moved or a driving component (such as an electric telescopic rod, a lead screw, etc.) can be provided.

[0103] Preferably, the manual form is selected; as Figure 25 , 26 shown, a slide rod 61 that penetrates through the lower end of the material guide plate 5 is fixedly provided at the lower end of the extension plate 6; a matching slideway 62 (penetrating through the frame lower end of the support panel 51) is provided at the lower end of the material guide plate 5; at the same time, the lower section of the slide rod 61 is provided with a thread and a nut is assembled to lock or adjust the position of the extension plate 6.

[0104] Embodiment Five.

[0105] As Figure 27-28 shown; similar to the solution of Embodiment Four, in this embodiment, an extension plate 6 is slidably provided at the rear side of the swing plate 1.

[0106] Specifically, a guiding and limiting structure is provided in cooperation with the rear side of the swing plate 1 and the extension plate 6, and the extension plate 6 slides through the guiding structure. During transportation, under the action of gravity, the extension plate 6 is automatically received; during unloading, the swing plate 1 is in an inclined form, and the extension plate 6 slides out under the action of gravity; it can be understood that a limiting mechanism is provided to prevent excessive sliding out.

[0107] For example, a plurality of guiding openings are provided on the extension plate 6; a limiting rod is fixedly provided corresponding to the position near the top of the rear side of the swing plate 1; as Figure 27 shown, during transportation, the extension plate 6 slides downwards; as Figure 28 shown, during unloading, the extension plate 6 slides outwards and is blocked by the limiting rod to maintain an appropriate extended length.

[0108] Preferably, the limiting rod is a screw rod and a nut is installed; the nut can be controlled to be tightened to form a non-slidable locked state for the extension plate 6.

[0109] A method for preventing aggregate separation during the unloading of a dump truck for roller compacted concrete construction, based on the foregoing device; includes the following steps; S1. Install a material guiding component at the rear of the carriage; S2. During the unloading process, reduce the unloading height difference of the concrete through the material guiding component to avoid the separation of aggregates caused by an excessive height difference.

[0110] In the present invention, by installing a material guiding component at the rear of the dump truck carriage, the blanking path is extended, the unloading height difference is reduced, and the separation of aggregates is avoided; the uniformity and construction quality of the roller compacted concrete are improved; the construction process is simplified, and the construction cost is reduced.

[0111] Compared with the prior art, the present invention has at least the following advantages: 1) Effectively prevent the separation of aggregates: By installing this device, the unloading height difference is reduced, significantly reducing the phenomenon of aggregate separation in the three-stage graded roller compacted concrete and improving the uniformity of the concrete; 2) Improve the construction quality: Avoid the influence of aggregate separation on the compactness and strength of the roller compacted concrete, ensuring the project quality; 3) Simple operation: The device has a simple structure and is easy to operate without additional manual intervention; 4) Wide application range: Applicable to various construction scenarios of roller compacted concrete in water conservancy and hydropower projects, with broad popularization and application value; 5) Have good popularization and application value.

[0112] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

[0113] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. 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, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

Claims

1. A dump truck unloading and anti-aggregate separation device for roller compacted concrete construction, characterized in that: include: A material guide component installed at the rear of the carriage to reduce the height difference of unloading.

2. The device for preventing aggregate separation during dump truck unloading for roller compacted concrete construction according to claim 1 is characterized in that: The material guiding assembly comprises: a swing plate (1) hinged at the rear end of the carriage; During transportation, the swing plate (1) is pressed against the outer side of the carriage door to lock the carriage door; during unloading, the swing plate (1) swings to release the carriage door and forms an extended material guiding structure.

3. The device for preventing aggregate separation during dump truck unloading for roller compacted concrete construction according to claim 2 is characterized in that: A chain (2) is provided at the lower end of the swing plate (1) and connected to the vehicle beam; During transportation, the chain (2) is in a taut state, pulling the swing plate (1) to swing inwards; during unloading, the chain (2) becomes loose, and the swing plate (1) swings outwards under the action of gravity.

4. The device for preventing aggregate separation during dump truck unloading for roller compacted concrete construction according to claim 3 is characterized in that: A hinge seat (3) is arranged on the inner side of the lower end of the swing plate (1) for rotationally assembling with the rear end of the carriage; a pin seat (31) is arranged above the hinge seat (3) for connecting one end of the chain (2).

5. The device for preventing aggregate separation during dump truck unloading for roller compacted concrete construction according to claim 2, characterized in that: The swing plate (1) is provided with self-adjusting retaining edges (4) near both ends.

6. The device for preventing aggregate separation during dump truck unloading for roller compacted concrete construction according to claim 2, characterized in that: Inner folding blocks (11) are provided at both ends of the swing plate (1).

7. The device for preventing aggregate separation during dump truck unloading for roller compacted concrete construction according to claim 1, characterized in that: The material guide assembly is a material guide plate (5) which is mounted on the rear of the carriage and extends backwards.

8. The device for preventing aggregate separation during dump truck unloading for roller compacted concrete construction according to claim 7, characterized in that: The rear end of the material guide plate (5) is provided with a ridge (54).

9. The device for preventing aggregate separation during dump truck unloading for roller compacted concrete construction according to claim 7, characterized in that: An extension plate (6) is slidably provided at the lower end of the material guide plate (5).

10. A method for preventing aggregate separation during dump truck unloading for roller compacted concrete construction, characterized in that: A device according to any one of claims 1 to 9; The steps include: S1. Install the material guide assembly at the rear of the carriage; S2. During the unloading process, the material guide assembly is used to reduce the unloading height difference of the concrete to avoid aggregate separation caused by excessive height difference.

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