A concrete mixing plant's holding hopper

Abstract

This utility model relates to the field of concrete mixing plant technology and discloses a waiting hopper for a concrete mixing plant, including a hopper body, a screen mechanism inside the hopper body, a buffer mechanism inside the hopper body, and a dust removal mechanism on the outside of the hopper body. This utility model separates gravel and sand in the aggregate by setting the screen mechanism, allowing for differentiated feeding of gravel and sand. During filtration and feeding, the dual-head servo motor, rotating shaft, worm gear, and worm wheel are all installed inside a fixed box, not inside the hopper body. Therefore, during transmission, the transmission will not be jammed by gravel or sand, ensuring the stability of the hopper body and screen mechanism during operation. The buffer mechanism reduces the impact force on the screen plate when the aggregate falls, extending the service life of the screen plate.

Description

Technical Field

[0001] This utility model relates to the field of concrete mixing plant technology, and in particular to a waiting hopper for a concrete mixing plant. Background Technology

[0002] To address the balance between production efficiency and space and capital constraints, a type of mixing plant has emerged that falls between single-stage and two-stage mixing equipment. Its key feature is the addition of an aggregate waiting hopper to the existing two-stage mixing system. Instead of being directly fed into the mixer after metering and batching, the aggregate is conveyed via belt conveyor or a bucket elevator to the hopper above the mixer. Upon receiving a feeding signal, the valve of the hopper opens, allowing the aggregate to be fed into the mixer. After feeding is complete, a closing control signal closes the valve. This allows for simultaneous aggregate metering and batching while the aggregate waits in the hopper, reducing waiting time, increasing utilization, and ultimately improving the overall production efficiency of the mixing plant.

[0003] In concrete mixing plants, hoppers are typically used to store aggregates transported by inclined belt conveyors and to feed them on demand, saving conveying time. However, conventional hoppers cannot distinguish between gravel and sand, and feeding both into the mixer at the same time causes a sharp increase in pressure, high mixing resistance, high energy consumption, and uneven mixing. Furthermore, when aggregates fall into the hopper from the inclined belt conveyor, dust is generated and dispersed into the air, causing environmental pollution. Therefore, further improvements are needed.

[0004] According to Chinese Patent Publication No. CN222371981U, an environmentally friendly material hopper for a concrete mixing plant can be used to separately add gravel and sand through an angle adjustment mechanism and a screen mechanism, so that the mixing resistance of the mixer will not suddenly increase. Separate addition can make the mixing more uniform. The dust collection mechanism can absorb and treat the dust that falls into the material hopper when the aggregate is conveyed by the inclined belt, preventing the dust from being scattered into the air and causing environmental pollution.

[0005] In the application, the threaded rod is placed inside the main body of the hopper. This may cause stones and sand to fall into the chute, causing the threaded rod to get stuck during transmission. At the same time, during the filtration of dust through the filter screen, it is not convenient to disassemble and clean the filter screen, which may leave dust residue on the filter screen and cause it to become clogged over time. Therefore, a new material hopper for a concrete mixing plant is proposed to solve the above problems. Utility Model Content

[0006] (a) Purpose of the utility model

[0007] To address the technical problems existing in the background art, this utility model proposes a waiting hopper for a concrete mixing plant. By setting a screen mechanism, it can separate stones and sand in the aggregate, allowing for the separate delivery of stones and sand. During the filtering and delivery process, the dual-head servo motor, rotating shaft, worm gear, and worm wheel are all installed inside a fixed box, not inside the main body of the waiting hopper. Therefore, during transmission, the transmission will not be jammed due to stones or sand, ensuring the stability of the main body of the waiting hopper and the screen mechanism during operation. This provides advantages such as ensuring the practicality and stability of the waiting hopper.

[0008] (II) Technical Solution

[0009] This utility model provides a waiting hopper for a concrete mixing plant, including a waiting hopper body, a screen mechanism inside the waiting hopper body, a buffer mechanism inside the waiting hopper body, and a dust removal mechanism on the outside of the waiting hopper body.

[0010] The screening mechanism includes a fixed box installed on the front of the hopper body. Two rotating rods extending into the hopper body are rotatably connected to the front side wall of the inner cavity of the fixed box. The rear ends of the two rotating rods are rotatably connected to the rear side wall of the inner cavity of the hopper body. Screen plates are installed on the outer sides of the two rotating rods. The front and back sides of the two screen plates are in contact with the front and rear side walls of the inner cavity of the hopper body, respectively, and the opposite sides of the two screen plates are in contact. A dual-head servo motor is installed on the inner bottom wall of the fixed box. The two output shafts of the dual-head servo motor are connected to rotating shafts through couplings. Worms are installed on the outer sides of the two rotating shafts. Worm wheels are installed on the outer sides of the two rotating rods. The two worms mesh with the two worm wheels, respectively.

[0011] Preferably, the buffer mechanism includes two shafts rotatably connected between the front and rear side walls of the inner cavity of the hopper body. An mounting block is installed on the outer side of each of the two shafts. A buffer plate is installed on the side of each mounting block away from the inner side wall of the hopper body. Torsion springs located on the outer side of the shafts are installed on the front and back of each mounting block. The opposite ends of the two torsion springs are respectively connected to the front and rear side walls of the inner cavity of the hopper body.

[0012] Preferably, the two buffer plates are staggered, and the side of each buffer plate away from the hopper body is inclined downward.

[0013] Preferably, the dust removal mechanism includes a dust collection funnel connected to the left side of the hopper body, a filter cylinder installed on the left side of the dust collection funnel, the other end of the dust collection funnel being connected to the inside of the filter cylinder, a suction fan connected to the top outer side of the filter cylinder, a cylinder cover provided on the top of the filter cylinder, a connecting block installed at the bottom of the cylinder cover, the connecting block being threadedly connected to the filter cylinder, two vertical rods installed at the bottom of the connecting block, filter plates installed at the bottom of the two vertical rods, the filter plates being adapted to the filter cylinder, and a handle installed on the top of the cylinder cover.

[0014] Preferably, a baffle is installed inside the dust collection funnel, the dust collection funnel is located below the filter plate, the suction fan is located above the filter plate, and a dust collection drawer located below the dust collection funnel is movably connected to the bottom outer side of the filter cylinder.

[0015] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0016] The concrete mixing plant's hopper, equipped with a screen mechanism, separates gravel and sand from the aggregate, allowing for differentiated feeding. During filtration and feeding, the dual-head servo motor, rotating shaft, worm gear, and worm wheel are all installed inside a fixed box, not inside the hopper itself. This prevents transmission from jamming due to gravel or sand, ensuring the stability of the hopper and screen mechanism during operation. A buffer mechanism reduces the impact of falling aggregate on the screen plate, extending its service life. A dust collection mechanism collects dust from falling aggregate, facilitating filter plate replacement or cleaning and ensuring effective dust removal. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the material waiting hopper of a concrete mixing plant proposed in this utility model.

[0018] Figure 2 This is a cross-sectional view of the hopper body and screen mechanism in the hopper of a concrete mixing plant proposed in this utility model.

[0019] Figure 3 This utility model proposes a waiting hopper for a concrete mixing plant. Figure 2 A magnified view of A in the middle.

[0020] Figure 4 This is a cross-sectional view of the hopper body and buffer mechanism in the hopper of a concrete mixing plant proposed in this utility model.

[0021] Figure 5 This utility model proposes a waiting hopper for a concrete mixing plant. Figure 4 A schematic diagram of the structure of B in the middle.

[0022] Figure 6 This is a cross-sectional view of the hopper body and dust removal mechanism in a concrete mixing plant according to the present invention.

[0023] Figure 7 This is a cross-sectional view of the filter cylinder and its internal structure in the waiting hopper of a concrete mixing plant, as proposed in this utility model.

[0024] Reference numerals in the attached drawings: 1. Hopper body; 2. Screening mechanism; 21. Fixed box; 22. Rotating rod; 23. Screen plate; 24. Dual-head servo motor; 25. Rotating shaft; 26. Worm gear; 27. Worm wheel; 3. Buffering mechanism; 31. Shaft; 32. Mounting block; 33. Buffer plate; 34. Torsion spring; 4. Dust removal mechanism; 41. Dust suction funnel; 42. Filter cartridge; 43. Fan; 44. Cylinder cover; 45. Connecting block; 46. Vertical rod; 47. Filter plate; 48. Handle. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, such as welding, riveting, or bonding; it can also be a detachable connection, such as threaded connection, keyed connection, or pin connection; or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] like Figure 1-7 As shown, the present invention proposes a waiting hopper for a concrete mixing plant, including a waiting hopper body 1, a screen mechanism 2 inside the waiting hopper body 1, a buffer mechanism 3 inside the waiting hopper body 1, and a dust removal mechanism 4 outside the waiting hopper body 1.

[0029] In this invention, the screen mechanism 2 can separate the stones and sand entering the hopper body 1, allowing for separate feeding of the stones and sand. This prevents a sudden increase in the mixing resistance of the mixer and also makes the mixing more uniform. The buffer mechanism 3 can buffer the stones and sand entering the hopper body 1, preventing them from falling directly into the screen mechanism 2 and impacting it, thus avoiding damage. The dust removal mechanism 4 can clean up the dust generated when the stones and sand enter the hopper body 1, preventing the dust from being scattered into the air and polluting the external environment.

[0030] like Figure 1-3 As shown, in an optional embodiment, the screen mechanism 2 includes a fixed box 21 installed on the front of the hopper body 1. Two rotating rods 22 extending into the hopper body 1 are rotatably connected to the front side wall of the inner cavity of the fixed box 21. The rear ends of the two rotating rods 22 are rotatably connected to the rear side wall of the inner cavity of the hopper body 1. Screen plates 23 are installed on the outer sides of the two rotating rods 22. The front and back sides of the two screen plates 23 are in contact with the front and rear side walls of the inner cavity of the hopper body 1, respectively. The opposite sides of the two screen plates 23 are in contact with each other. A dual-head servo motor 24 is installed on the inner bottom wall of the fixed box 21. The two output shafts of the dual-head servo motor 24 are connected to rotating shafts 25 through couplings. Worms 26 are installed on the outer sides of the two rotating shafts 25. Worm wheels 27 are installed on the outer sides of the two rotating rods 22. The two worms 26 mesh with the two worm wheels 27, respectively.

[0031] When the gravel and sand enter the hopper body 1, they fall to the top of the two screen plates 23. After being screened by the screen plates 23, the sand falls to the bottom of the screen plates 23, while the gravel remains on the top of the screen plates 23. After the aggregate is conveyed, the dual-head servo motor 24 is started. The two output shafts of the dual-head servo motor 24 will drive the two rotating shafts 25 to rotate. The two rotating shafts 25 will drive the two worm gears 26 to rotate. The two worm gears 26 will drive the two meshing worm wheels 27 to rotate. The two worm wheels 27 will drive the two rotating rods 22 to rotate. The two rotating rods 22 will drive the two screen plates 23 to rotate.

[0032] Because the two worm gears 26 and the two worm wheels 27 are symmetrically arranged, the two screen plates 23 will rotate in opposite directions when they rotate. In use, the valve below the hopper body 1 is first activated to discharge the sand inside the hopper body 1 into the mixer. After the sand is discharged, the dual-head servo motor 24 is activated to make the two screen plates 23 rotate downwards at the same time, so that the stones on the top of the two screen plates 23 fall down and further fall into the mixer.

[0033] During use, the dual-head servo motor 24, rotating shaft 25, worm gear 26 and worm wheel 27 are all installed inside the fixed box 21 and not inside the hopper body 1. Therefore, during transmission, the transmission will not be jammed by stones or sand, ensuring the stability of the hopper body 1 and the screen mechanism 2 during operation.

[0034] like Figure 4 and Figure 5 As shown, in an optional embodiment, the buffer mechanism 3 includes two shafts 31 rotatably connected between the front and rear side walls of the inner cavity of the hopper body 1. Mounting blocks 32 are installed on the outer sides of the two shafts 31. Buffer plates 33 are installed on the side of the two mounting blocks 32 away from the inner side wall of the hopper body 1. Torsion springs 34 located on the outer sides of the shafts 31 are installed on both the front and back sides of the mounting blocks 32. The opposite ends of the two torsion springs 34 are respectively connected to the front and rear side walls of the inner cavity of the hopper body 1.

[0035] When the aggregate enters the hopper body 1, it first falls to the top of the buffer plate 33, and then from the top of the buffer plate 33 to the top of the screen plate 23. When the buffer plate 33 is impacted by the aggregate, it will rotate under the action of the torsion spring 34, thereby absorbing the impact force of the aggregate and reducing the impact force of the aggregate on the screen plate 23, thus reducing the damage caused by the impact force of the aggregate on the screen plate 23.

[0036] like Figure 4 As shown, in an optional embodiment, the two buffer plates 33 are staggered, and the side of the two buffer plates 33 away from the hopper body 1 is inclined downward.

[0037] The aggregate can be buffered twice by the two buffer plates 33, which further reduces the impact force of the aggregate on the screen plate 23. At the same time, the inclined screen plate 23 allows the aggregate to fall smoothly to the top of the screen plate 23 under its own gravity.

[0038] like Figure 6-7As shown, in an optional embodiment, the dust removal mechanism 4 includes a dust collection funnel 41 connected to the left side of the hopper body 1. A filter cylinder 42 is installed on the left side of the dust collection funnel 41. The other end of the dust collection funnel 41 is connected to the inside of the filter cylinder 42. A suction fan 43 is connected to the top of the outer side of the filter cylinder 42. A cylinder cover 44 is provided on the top of the filter cylinder 42. A connecting block 45 is installed at the bottom of the cylinder cover 44. The connecting block 45 is threadedly connected to the filter cylinder 42. Two vertical rods 46 are installed at the bottom of the connecting block 45. A filter plate 47 is installed at the bottom of the two vertical rods 46. The filter plate 47 is adapted to the filter cylinder 42. A handle 48 is installed on the top of the cylinder cover 44.

[0039] When the aggregate falls into the hopper body 1, a large amount of dust will be generated. At this time, the suction fan 43 is started. The suction fan 43 will clean the generated dust under the action of the filter cylinder 42 and the dust collection funnel 41. When the dust enters the filter cylinder 42 with the air, it will be filtered by the filter plate 47 inside the filter cylinder 42, so that the dust remains inside the filter cylinder 42.

[0040] After a period of use, the handle 48 can be turned, which will cause the cover 44 to rotate. The cover 44 will then cause the connecting block 45 to rotate. When the connecting block 45 is disengaged from the filter cylinder 42, the cover 44 can be lifted upwards. Under the action of the two vertical rods 46, the filter plate 47 can be removed from the inside of the filter cylinder 42, making it convenient to clean or replace the filter plate 47.

[0041] The dust collection funnel 41 is equipped with a baffle screen inside, which can block stones and sand, ensuring that dust can enter the filter cartridge 42 with the air, and preventing stones or sand from entering the filter cartridge 42 and affecting the dust removal effect of the dust removal mechanism 4.

[0042] The dust collection funnel 41 is located below the filter plate 47, and the suction fan 43 is located above the filter plate 47, ensuring that the filter plate 47 can completely filter the dust in the air, so that the dust will fall into the interior of the filter cartridge 42.

[0043] The bottom outer side of the filter cartridge 42 is movably connected to a dust collection drawer located below the dust collection funnel 41. When dust falls, it will fall directly into the dust collection drawer. By removing the dust collection drawer, the dust inside the dust collection drawer can be collected and processed.

[0044] like Figure 1 As shown, in an optional embodiment, a vibrator is provided on the outside of the hopper body 1, which can improve the filtration effect of the screen plate 23. A controller is installed on the outside of the hopper body 1, and the dual-head servo motor 24 and the suction fan 43 are electrically connected to the controller. The dual-head servo motor 24 and the suction fan 43 can be controlled by the controller.

[0045] Working principle:

[0046] In operation, the aggregate in the waiting hopper of this concrete mixing plant is fed into the hopper body 1 via a conveying mechanism. The aggregate first falls onto the top of the buffer plate 33, and then from the top of the buffer plate 33 onto the top of the screen plate 23. When impacted by the aggregate, the buffer plate 33 rotates under the action of the torsion spring 34, thus absorbing the impact force and reducing the impact on the screen plate 23. When the aggregate falls to the top of the screen plate 23, it is filtered by the screen plate 23, causing sand to fall to the bottom of the screen plate 23 while gravel remains on the top. After the aggregate delivery is complete, the valve at the bottom of the waiting hopper body 1 is activated. The door discharges the sand inside the hopper body 1 into the mixer. After the sand is discharged, the dual-head servo motor 24 is started, causing the two screen plates 23 to rotate downwards simultaneously, so that the stones on the top of the two screen plates 23 fall down and further into the mixer. At the same time, before the hopper body 1 is used, the suction fan 43 is started. The suction fan 43 cleans the dust generated by the filter cylinder 42 and the dust funnel 41. When the dust enters the filter cylinder 42 with the air, it will be filtered by the filter plate 47 inside the filter cylinder 42, so that the dust remains inside the filter cylinder 42 and prevents the dust from polluting the external environment.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waiting hopper of a concrete mixing plant, comprising a waiting hopper body (1), characterized in that, The hopper body (1) is provided with a screen mechanism (2) inside, a buffer mechanism (3) inside, and a dust removal mechanism (4) outside. The screen mechanism (2) includes a fixed box (21) installed on the front of the hopper body (1). The front wall of the inner cavity of the fixed box (21) is rotatably connected to two rotating rods (22) extending into the inner cavity of the hopper body (1). The rear ends of the two rotating rods (22) are rotatably connected to the rear wall of the inner cavity of the hopper body (1). Screen plates (23) are installed on the outer sides of the two rotating rods (22). The front and back sides of the two screen plates (23) are respectively connected to the inner cavity of the hopper body (1). The front and rear side walls of the cavity are in contact with each other, and the opposite sides of the two sieve plates (23) are in contact with each other. A dual-head servo motor (24) is installed on the inner bottom wall of the fixed box (21). The two output shafts of the dual-head servo motor (24) are connected to the rotating shaft (25) through the coupling. Worms (26) are installed on the outer side of the two rotating shafts (25). Worm wheels (27) are installed on the outer side of the two rotating rods (22). The two worms (26) mesh with the two worm wheels (27) respectively.

2. A concrete mixing plant holding hopper according to claim 1, characterized in that The buffer mechanism (3) includes two shafts (31) rotatably connected between the front and rear side walls of the inner cavity of the hopper body (1). Mounting blocks (32) are installed on the outer side of the two shafts (31). A buffer plate (33) is installed on the side of the two mounting blocks (32) away from the inner side wall of the hopper body (1). Torsion springs (34) located on the outer side of the shafts (31) are installed on the front and back of the mounting blocks (32). The opposite ends of the two torsion springs (34) are respectively connected to the front and rear side walls of the inner cavity of the hopper body (1).

3. A concrete mixing plant holding hopper according to claim 2, characterized in that The two buffer plates (33) are staggered, and both buffer plates (33) are inclined downward on the side away from the hopper body (1).

4. A surge hopper for a concrete mixing plant according to claim 1, wherein, The dust removal mechanism (4) includes a dust suction funnel (41) connected to the left side of the hopper body (1). A filter cylinder (42) is installed on the left side of the dust suction funnel (41). The other end of the dust suction funnel (41) is connected to the inside of the filter cylinder (42). A suction fan (43) is connected to the top of the outer side of the filter cylinder (42). A cylinder cover (44) is provided on the top of the filter cylinder (42). A connecting block (45) is installed at the bottom of the cylinder cover (44). The connecting block (45) is threadedly connected to the filter cylinder (42). Two vertical rods (46) are installed at the bottom of the connecting block (45). A filter plate (47) is installed at the bottom of the two vertical rods (46). The filter plate (47) is adapted to the filter cylinder (42). A handle (48) is installed on the top of the cylinder cover (44).

5. A concrete mixing plant holding hopper according to claim 4, characterized in that The dust collection funnel (41) is equipped with a baffle mesh inside. The dust collection funnel (41) is located below the filter plate (47). The suction fan (43) is located above the filter plate (47). The bottom of the outer side of the filter cylinder (42) is movably connected to a dust collection drawer located below the dust collection funnel (41).

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