A dust reduction device for a concrete mixing plant

Abstract

The application relates to a concrete mixing plant dust falling device, belonging to the field of concrete production equipment, which is arranged in a stock bin, one side wall of the stock bin is in an open state, the dust falling device comprises a water pipe fixedly connected to the top of the stock bin, a branch pipe is vertically and fixedly connected to the water pipe, a box body is threadedly connected to the branch pipe, a water outlet of the branch pipe is located in the box body, a plurality of through holes penetrating through the side wall of the box body are formed in the side wall of the box body, a plugging assembly for plugging the through holes is arranged on the branch pipe, and a driving assembly for controlling the work of the plugging assembly and driving the rotation of the box body is arranged in the stock bin. The application has the effect of better inhibiting dust raising in the stock bin.

Description

Technical Field

[0001] This application relates to the field of equipment for concrete production, and in particular to a dust suppression device for a concrete mixing plant. Background Technology

[0002] A concrete mixing plant is a building material manufacturing equipment consisting of five major systems: a mixing host, a material weighing system, a material conveying system, a material storage system, and a control system, along with other auxiliary facilities. The concrete mixing plant includes a warehouse for temporary raw material storage, containing multiple silos for discharging materials. One side of each silo is open, and each silo contains a trough. A vibrating discharge device is installed above the trough, and below the trough is a material conveying system for transporting materials. An inclined platform is located on the open side of the silo, connecting to the upper surface of the trough. When adding materials to the silos, a loader is typically used to transport the accumulated raw materials from the silos to the top of the trough, where they are then dumped. Simultaneously, the vibrating discharge device vibrates the material, causing it to fall into the material conveying system, which then transports the material to the next process step.

[0003] Since material dumping will cause dust, in order to reduce the adverse effects on the health of operators, a water pipe is connected to the top of the silo. The end of the water pipe is connected to a spray pipe. The spray pipe is horizontally set and both ends of the spray pipe are open. When material is dumped, water flows out of the water pipe to suppress dust, thereby reducing the amount of dust that drifts outside the silo.

[0004] Because the water pipes are fixed at the top of the silo, water can only flow from both ends of the spray pipes, so the water coverage is limited and the effect on suppressing dust in the silo is not good. Summary of the Invention

[0005] To better suppress dust in the silo, this application provides a dust suppression device for a concrete mixing plant.

[0006] The dust suppression device for a concrete mixing plant provided in this application adopts the following technical solution:

[0007] A dust suppression device for a concrete mixing plant is installed in a silo. One side wall of the silo is open. The dust suppression device includes a water pipe fixedly connected to the top of the silo, a branch pipe vertically connected to the water pipe, and a box connected to the branch pipe by threads. The outlet of the branch pipe is located inside the box. Several through holes penetrating the side wall of the box are opened on the side wall. A sealing component for sealing the through holes is provided on the branch pipe. A drive component for controlling the operation of the sealing component and driving the box to rotate is provided in the silo.

[0008] By adopting the above technical solution, in the initial state, the sealing component seals the through holes on the box. When the operator operates the loader to transfer the material into the hopper, the operator operates the loader to unload the material into the hopper. During the unloading process, the loader's mechanical arm is raised. During the raising of the loader's mechanical arm, the mechanical arm triggers the drive component to work. The drive component works to release the sealing component from the through holes, and the water in the water pipe can flow into the box along the branch pipe. The water in the box flows out to the outside through the through holes. At the same time as water flows out of the box, the drive component also drives the box to rotate. The rotation of the box makes the water coverage wider, thereby better suppressing dust.

[0009] Optionally, the drive assembly includes a mounting plate fixedly connected to the side wall of the branch pipe, a drive spring fixedly connected to the mounting plate, the drive spring being sleeved on the branch pipe, a lower ring plate slidably inserted into the branch pipe, the upper end of the drive spring being fixedly connected to the lower surface of the lower ring plate, the mounting plate, the drive spring, and the lower ring plate being located inside the housing, an upper ring plate being sleeved on the branch pipe, the upper ring plate being located above the housing, a vertical rod being slidably connected to each of the two opposing inner side walls of the hopper, the vertical rod sliding along the height direction of the hopper, the length direction of the vertical rod being set along the height direction of the hopper, an upper horizontal rod being fixedly connected to the upper end of the vertical rod, the end of the upper horizontal rod away from the vertical rod being fixedly connected to the upper ring plate, a lower horizontal rod being fixedly connected between the two vertical rods, the lower horizontal rod being located below the upper horizontal rod.

[0010] By adopting the above technical solution, in the initial state, the drive spring is in a compressed state under the combined gravity of the lower crossbar, vertical bar, upper crossbar, and upper ring plate. The sealing component seals the through hole, and no water flows out of the box. During the unloading process of the loader, the robotic arm is raised. When the robotic arm contacts the lower crossbar, as the robotic arm continues to rise, it pushes the lower crossbar, vertical bar, upper crossbar, and upper ring plate upward. At the same time as the upper ring plate moves, the drive spring recovers its deformation and pushes the lower ring plate and the box upward. Simultaneously, the sealing component releases the seal on the through hole, and the water in the water pipe flows into the box along the branch pipe and finally flows to the outside through the through hole on the box. Since the box is threadedly connected to the branch pipe, the box also rotates while moving upward.

[0011] After unloading is completed, the robotic arm moves downwards. At the same time, the lower horizontal bar, vertical bar, upper horizontal bar, and upper ring plate move downwards under their own weight. The movement of the upper ring plate presses the box body and the lower ring plate downwards. The movement of the lower ring plate compresses the drive spring. When the robotic arm disengages from the lower horizontal bar, the box body moves to the initial position. At this time, the sealing component seals the through holes on the box body again, reducing the waste of water resources caused by continuous water outflow from the box body.

[0012] Optionally, the sealing assembly includes sleeves corresponding to the through holes one by one. The sleeves are fixedly connected to the side wall of the mounting plate. A sealing spring is fixedly connected to the inner bottom wall of the sleeve. A support rod is also slidably inserted into the sleeve. The support rod is fixedly connected to the sealing spring. A sealing ball is fixedly connected to one end of the support rod that protrudes into the sleeve. The sealing ball contacts the hole wall of the corresponding through hole, and the sealing spring is in a compressed state.

[0013] By adopting the above technical solution, in the initial state, the sealing spring is in a compressed state, and the sealing ball blocks the through hole. When the box moves upward, the side wall of the box corresponding to the sealing ball pushes the sealing ball and the support rod to move closer to the upper ring plate. The movement of the support rod further compresses the sealing spring. When the box moves downward, the box and the sealing ball move relative to each other. When the sealing ball moves to the position corresponding to the through hole, the sealing spring recovers its deformation and pushes the support rod and the sealing ball to move until the sealing ball contacts the hole wall of the through hole. The sealing ball blocks the through hole again, so that water flows out of the box when unloading. The intermittent water discharge of the box reduces the waste of water resources.

[0014] Optionally, the housing is fixedly connected with a spray pipe corresponding to a through hole. The spray pipe covers the through hole, the through hole is located in the spray pipe, and the diameter of the through hole is smaller than the inner diameter of the spray pipe. The spray pipe is perpendicular to the corresponding side wall of the housing. Multiple spray holes are opened on the spray pipe, and the multiple spray holes are distributed along the length of the spray pipe.

[0015] By adopting the above technical solution, when the box rotates, the water in the water pipe flows into the box along the branch pipe, and the water in the box flows into the spray pipe along the through hole, and then flows to the outside along the spray pipe. The spray pipe extends the water's movement distance, thereby making the water coverage wider and further improving the dust suppression effect.

[0016] Optionally, the spray pipe is hinged with a cover plate that corresponds one-to-one with the spray holes, and the cover plate seals the spray holes.

[0017] By adopting the above technical solution, when water flows out of the spray hole, the water flow pushes the cover plate to rotate away from the spray pipe. When no water flows out of the spray hole, the cover plate rotates towards the spray pipe under its own weight until the cover plate blocks the spray hole, reducing the situation of dust clogging the spray hole.

[0018] Optionally, a guide block is fixedly connected to the inner wall of the vertical rod near the corresponding inner wall of the hopper. A guide groove corresponding to the guide block is opened on the inner wall of the hopper and the vertical rod. The length direction of the guide groove is set along the height direction of the hopper, and the guide block is slidably inserted into the guide groove.

[0019] By adopting the above technical solution, when the lower horizontal bar, vertical bar, upper horizontal bar, and upper ring plate move, the guide block slides along the guide groove. The guide block and the guide groove cooperate to limit the vertical bar, thereby reducing the situation where the vertical bar gets stuck with the side wall of the hopper due to the rotation of the lower horizontal bar, upper horizontal bar, and upper ring plate.

[0020] Optionally, a limiting plate is vertically fixedly connected to the inner wall of the hopper corresponding to the vertical rod, the vertical rod overlaps the limiting plate, and the sealing ball contacts the hole wall of the through hole.

[0021] By adopting the above technical solution, when the vertical rod is attached to the limiting plate, the box is in the initial position, so that the sealing ball can more accurately seal the through hole.

[0022] Optionally, a torsion spring is fitted on the hinge shaft of the cover plate, with one end of the torsion spring fixedly connected to the cover plate and the other end of the torsion spring fixedly connected to the spray pipe.

[0023] By adopting the above technical solution, when water flows out of the spray pipe, the water flow pushes the cover plate to rotate. The rotation of the cover plate causes the torsion spring to deform. When no water flows out of the spray pipe, the torsion spring returns to its deformation and pushes the cover plate to move closer to the spray pipe, so that the cover plate can block the spray hole and reduce the situation where the cover plate cannot rotate to block the spray hole again under its own weight.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By setting up silos, water pipes, branch pipes, drive components, and sealing components, the water coverage area is expanded, thereby better suppressing dust.

[0026] 2. By setting up an upper ring plate, a lower ring plate, a mounting plate, a drive spring, an upper horizontal bar, a vertical bar, and a lower horizontal bar, the housing can be driven to rotate and the sealing components can be controlled to work.

[0027] 3. By setting up sleeves, support rods, sealing springs, and sealing balls, water flows out of the box during unloading, and the intermittent water discharge of the box reduces the waste of water resources. Attached Figure Description

[0028] Figure 1 This is a schematic diagram illustrating the overall structure of the dust suppression device in an embodiment of this application.

[0029] Figure 2 This is a cross-sectional view illustrating the overall structure of the dust suppression device in the embodiments of this application.

[0030] Figure 3 This is a cross-sectional view illustrating a portion of the structure of the dust suppression device in an embodiment of this application.

[0031] Figure 4This is a schematic diagram illustrating the connection between the cover plate and the spray pipe in an embodiment of this application.

[0032] Figure 5 It is a manifestation Figure 4 Enlarged view of the structure at point A in the middle.

[0033] Explanation of reference numerals in the attached drawings: 1. Hopper; 11. Feed trough; 12. Inclined platform; 13. Guide groove; 2. Water pipe; 21. Branch pipe; 211. Water outlet; 3. Box body; 31. Through hole; 4. Spray pipe; 41. Spray hole; 42. Cover plate; 43. Torsion spring; 5. Drive assembly; 51. Mounting plate; 52. Drive spring; 53. Lower ring plate; 54. Upper ring plate; 55. Upper crossbar; 56. Vertical bar; 561. Guide block; 57. Lower crossbar; 58. Limiting plate; 6. Sealing assembly; 61. Sleeve; 62. Sealing spring; 63. Support rod; 64. Sealing ball. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0035] This application discloses a dust suppression device for a concrete mixing plant. (Refer to...) Figure 1 and Figure 2 The dust suppression device is installed in the silo 1, one side of which is open. A material trough 11 is installed in the silo 1. An inclined platform 12 is installed on the ground of the open side of the silo 1, and the upper surface of the inclined platform 12 is connected to the upper surface of the material trough 11. (Refer to...) Figure 2 and Figure 3 The dust suppression device includes a water pipe 2 fixedly connected to the top surface of the silo 1. One end of the water pipe 2 is connected to a water source. A branch pipe 21 is connected to the water pipe 2. The branch pipe 21 is perpendicular to the water pipe 2 and is located in the middle of the silo 1. A box 3 is threadedly connected to the branch pipe 21. The water outlet 211 of the branch pipe 21 is located inside the box 3. Two spray pipes 4 are connected to the box 3. The spray pipes 4 are horizontally arranged and the two spray pipes 4 are arranged coaxially. The silo 1 is equipped with a drive assembly 5 for driving the box 3 to rotate. The box 3 is equipped with a sealing assembly 6 for sealing the spray pipes 4.

[0036] When the operator manipulates the loader to pour materials into the hopper 11, the loader moves on the inclined platform 12. When the loader pours materials, it needs to raise the mechanical arm. During the raising of the loader's mechanical arm, the loader triggers the drive component 5 to work. The drive component 5 drives the housing 3 to rotate. At the same time, the sealing component 6 releases the blockage on the spray pipe 4, and the water in the water pipe 2 can be sprayed out along the spray pipe 4. During the spraying of water along the spray pipe 4, the housing 3 rotates, which drives the spray pipe 4 to rotate, thereby making the water coverage wider and the dust suppression effect in the hopper 1 better.

[0037] The outer wall of the branch pipe 21 is threaded, and the lower end of the branch pipe 21 penetrates the surface of the box 3 and extends into the box 3. The side wall of the box 3 that contacts the outer wall of the branch pipe 21 is threaded with a thread corresponding to the branch pipe 21, and the box 3 and the branch pipe 21 are threadedly connected. Both spray pipes 4 are located at the upper part of the box 3 and are arranged coaxially. The side wall of the spray pipe 4 is also provided with multiple spray holes 41 that penetrate its own side wall. The multiple spray holes 41 are evenly distributed along the length of the spray pipe 4. A through hole 31 that penetrates its own side wall is provided at the position where the box 3 connects to the spray pipe 4. The spray pipe 4 is covered by the through hole 31, and the inner diameter of the spray pipe 4 is larger than the diameter of the through hole 31.

[0038] The drive assembly 5 includes a mounting plate 51 fixedly connected to the outer wall of the branch pipe 21. The mounting plate 51 is annular and coaxial with the branch pipe 21. A drive spring 52 is fixedly connected to the upper surface of the mounting plate 51. The drive spring 52 is coaxial with the branch pipe 21 and is sleeved on the branch pipe 21. A lower ring plate 53 is also slidably inserted into the branch pipe 21. The lower ring plate 53 is coaxial with the branch pipe 21 and is sleeved on the branch pipe 21. The upper end of the drive spring 52 is fixedly connected to the lower surface of the lower ring plate 53. The mounting plate 51 and the lower ring plate 53 are both located inside the housing 3.

[0039] The drive assembly 5 also includes an upper ring plate 54 that is slidably inserted into the branch pipe 21. The upper ring plate 54 is sleeved on the branch pipe 21 and is located above the housing 3. Two upper horizontal bars 55 are fixedly connected to the side wall of the upper ring plate 54. The two upper horizontal bars 55 are distributed circumferentially along the upper ring plate 54. The length direction of the upper horizontal bars 55 is arranged radially along the upper ring plate 54. A vertical bar 56 is fixedly connected to the end of the upper horizontal bar 55 away from the upper ring plate 54. The two vertical bars 56 are arranged parallel to each other and perpendicular to the corresponding upper horizontal bar 55. The side walls of the two vertical bars 56 that are far apart from each other are in contact with the corresponding inner side wall of the hopper 1.

[0040] A guide block 561 is fixedly connected to the side wall of the vertical rod 56 that contacts the inner side wall of the hopper 1. A guide groove 13 corresponding to the guide block 561 is provided on the inner side wall of the hopper 1. The length direction of the guide groove 13 is set along the height direction of the hopper 1. Each guide block 561 is slidably inserted into the corresponding guide groove 13. A lower horizontal rod 57 is provided between the two vertical rods 56. The lower horizontal rod 57 is located at the lower end of the vertical rod 56. One end of the lower horizontal rod 57 is fixedly connected to one of the vertical rods 56, and the other end of the lower horizontal rod 57 is fixedly connected to the other vertical rod 56. The lower horizontal rod 57 is parallel to the upper horizontal rod 55.

[0041] In the initial state, the drive spring 52 is compressed under the combined weight of the upper horizontal bar 55, the vertical bar 56, the lower horizontal bar 57, the upper ring plate 54, and the housing 3. The mounting plate 51 is located on the upper part of the housing 3, the housing 3 overlaps the lower ring plate 53, and the upper ring plate 54 presses on the housing 3. When the loader moves to a suitable position on the inclined platform 12, the loader's mechanical arm is located below the lower horizontal bar 57. When the loader dumps material, the loader's mechanical arm is raised. During the raising process, the mechanical arm pushes the lower horizontal bar 57, the vertical bar 56, the upper horizontal bar 55, and the upper ring plate 54 upward. At the same time, the guide block 561 moves along the guide groove 13 to limit the movement of the vertical bar 56, reducing the possibility that the upper ring plate 54 will cause the vertical bar 56 and the lower horizontal bar 57 to rotate during the movement, thereby reducing the adverse effects of the rotation of the lower horizontal bar 57 on the loader's unloading.

[0042] As the upper ring plate 54 moves upward, the drive spring 52 recovers its deformation, pushing the lower ring plate 53 and the housing 3 upward. During the movement of the housing 3, the sealing assembly 6 releases the seal on the spray pipe 4, and the water in the water pipe 2 flows into the spray pipe 4 along the branch pipe 21, and then flows out along the spray holes 41 on the spray pipe 4. During the upward movement of the housing 3, because the housing 3 is threadedly connected to the branch pipe 21, the housing 3 also rotates during the movement. The rotation of the housing 3 drives the spray pipe 4 to rotate, thereby expanding the range of water action.

[0043] The sealing assembly 6 includes two sleeves 61 fixedly connected to the outer wall of the mounting plate 51. The number of sleeves 61 corresponds to the number of spray pipes 4. One sleeve 61 is coaxially arranged with one of the spray pipes 4, and the other sleeve 61 is coaxially arranged with another spray pipe 4. A sealing spring 62 is fixedly connected to the inner bottom wall of the sleeve 61. A support rod 63 is fixedly connected to the end of the sealing spring 62. The support rod 63 is slidably inserted into the sleeve 61. One end of the support rod 63 protrudes from the sleeve 61. A sealing ball 64 is fixedly connected to the end of the support rod 63 protruding from the sleeve 61. The diameter of the sealing ball 64 is larger than the diameter of the through hole 31. The sealing ball 64 seals the through hole 31, and the sealing spring 62 is always in a compressed state.

[0044] When the drive spring 52 pushes the housing 3 upward, the inner wall of the through hole 31 of the housing 3 moves relative to the sealing ball 64, thereby releasing the sealing ball 64 from blocking the through hole 31. Water in the water pipe 2 can flow into the spray pipe 4 along the branch pipe 21, and finally flow out of the spray pipe 4 through the spray hole 41. At the same time, the side wall of the housing 3 in contact with the sealing ball 64 pushes the sealing ball 64 and the support rod 63 to move, causing the support rod 63 to move into the sleeve 61. The movement of the support rod 63 further compresses the sealing spring 62.

[0045] When the forklift finishes unloading, the robotic arm moves downwards. The upper horizontal bar 55, vertical bar 56, and lower horizontal bar 57 move downwards under their own weight. The upper ring plate 54 moves, pressing the housing 3 and the lower ring plate 53 to move. The movement of the lower ring plate 53 compresses the drive spring 52. The housing 3 and the sealing ball 64 move relative to each other. When the housing 3 moves to the initial position, the sealing spring 62 recovers its deformation and pushes the support rod 63 and the sealing ball 64 to move until the sealing ball 64 contacts the wall of the through hole 31. The sealing ball 64 then seals the through hole 31 again, so that the water in the water pipe 2 does not flow out when the material is not being unloaded, achieving the purpose of intermittent water flow in the water pipe 2 and reducing the waste of water resources caused by continuous water flow in the branch pipe 21.

[0046] To ensure that the housing 3 can be restored to its initial position more accurately, a limiting plate 58 is fixedly connected to the side wall of the hopper 1 corresponding to the vertical rod 56. In the initial state, the vertical rod 56 overlaps the limiting plate 58. After unloading, the vertical rod 56 moves downward. When the vertical rod 56 moves to contact the limiting plate 58, the housing 3 is restored to its initial position, reducing the misalignment between the sealing ball 64 and the through hole 31, and allowing the sealing ball 64 to better seal the through hole 31.

[0047] Reference Figure 4 and Figure 5 To reduce dust clogging of the spray holes 41, cover plates 42 corresponding to the spray holes 41 are hinged to the side wall of the spray pipe 4. A torsion spring 43 is sleeved on the hinge rod of the cover plate 42. One end of the torsion spring 43 is fixedly connected to the cover plate 42, and the other end of the torsion spring 43 is fixedly connected to the outer side wall of the spray pipe 4. When the torsion spring 43 is in its natural state, the cover plate 42 is in contact with the outer side wall of the spray pipe 4. When water flows out of the spray pipe 4, the water flow pushes the cover plate 42 to rotate away from the side wall of the spray pipe 4. The rotation of the cover plate 42 causes the torsion spring 43 to deform, so that the water in the spray pipe 4 can flow to the outside along the spray holes 41. When no water flows out of the spray pipe 4, the torsion spring 43 returns to its deformation and drives the cover plate 42 to rotate until the cover plate 42 contacts the side wall of the spray pipe 4. The cover plate 42 covers the spray holes 41, reducing the possibility of dust clogging the spray holes 41.

[0048] The implementation principle of a dust suppression device for a concrete mixing plant according to an embodiment of this application is as follows: When material is poured into the material trough 11, the robotic arm raises and pushes the lower horizontal bar 57, vertical bar 56, upper horizontal bar 55 and upper ring plate 54 to move upward. At the same time, the spring 52 is driven to restore its deformation and push the lower ring plate 53 and the box 3 to move upward. The box 3 and the sealing ball 64 move relative to each other. The water in the water pipe 2 flows into the spray pipe 4 along the branch pipe 21. The water in the spray pipe 4 pushes the cover plate 42 to rotate, so that the water in the spray pipe 4 can flow out along the spray hole 41. The movement of the box 3 also drives the rotation of the spray pipe 4.

[0049] After unloading is completed, the robotic arm moves downwards, and at the same time, the lower horizontal bar 57, the vertical bar 56, the upper horizontal bar 55, and the upper ring plate 54 move downwards. During this process, the upper ring plate 54 presses the box body 3 and the lower ring plate 53 to move downwards. When the box body 3 moves to the initial position, the sealing ball 64 seals the through hole 31, and no water flows out of the spray pipe 4. The torsion spring 43 returns to its deformation and drives the cover plate 42 to rotate until the cover plate 42 seals the spray hole 41.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dust suppression device for a concrete mixing plant, which is installed in a silo (1), one side wall of the silo (1) being open, characterized in that: The dust suppression device includes a water pipe (2) fixedly connected to the top of the silo (1), a branch pipe (21) vertically fixedly connected to the water pipe (2), a box (3) threadedly connected to the branch pipe (21), the water outlet (211) of the branch pipe (21) is located inside the box (3), several through holes (31) penetrating the side wall of the box (3) are provided, a sealing component (6) for sealing the through holes (31) is provided on the branch pipe (21), and a drive component (5) for controlling the operation of the sealing component (6) and driving the box (3) to rotate is provided in the silo (1). The drive assembly (5) includes a mounting plate (51) fixedly connected to the side wall of the branch pipe (21). A drive spring (52) is fixedly connected to the mounting plate (51). The drive spring (52) is sleeved on the branch pipe (21). A lower ring plate (53) is also slidably inserted into the branch pipe (21). The upper end of the drive spring (52) is fixedly connected to the lower surface of the lower ring plate (53). The mounting plate (51), the drive spring (52), and the lower ring plate (53) are all located inside the housing (3). An upper ring plate (54) is also sleeved on the branch pipe (21). The plate (54) is located above the box (3). A vertical rod (56) is slidably connected to each of the two inner side walls of the hopper (1). The vertical rod (56) slides along the height direction of the hopper (1). The length direction of the vertical rod (56) is set along the height direction of the hopper (1). An upper horizontal rod (55) is fixedly connected to the upper end of the vertical rod (56). The end of the upper horizontal rod (55) away from the vertical rod (56) is fixedly connected to the upper ring plate (54). A lower horizontal rod (57) is fixedly connected between the two vertical rods (56). The lower horizontal rod (57) is located below the upper horizontal rod (55).

2. The dust suppression device for a concrete mixing plant according to claim 1, characterized in that: The sealing assembly (6) includes a sleeve (61) corresponding to the through hole (31) one by one. The sleeve (61) is fixedly connected to the side wall of the mounting plate (51). A sealing spring (62) is fixedly connected to the inner bottom wall of the sleeve (61). A support rod (63) is also slidably inserted into the sleeve (61). The support rod (63) is fixedly connected to the sealing spring (62). A sealing ball (64) is fixedly connected to one end of the support rod (63) that protrudes from the sleeve (61). The sealing ball (64) contacts the hole wall of the corresponding through hole (31). The sealing spring (62) is in a compressed state.

3. The dust suppression device for a concrete mixing plant according to claim 1, characterized in that: The box (3) is fixedly connected with a spray pipe (4) corresponding to the through hole (31). The spray pipe (4) is covered at the through hole (31). The through hole (31) is connected to the spray pipe (4). The diameter of the through hole (31) is smaller than the inner diameter of the spray pipe (4). The spray pipe (4) is perpendicular to the side wall of the box (3). Multiple spray holes (41) are opened on the spray pipe (4) and the multiple spray holes (41) are distributed along the length direction of the spray pipe (4).

4. A dust suppression device for a concrete mixing plant according to claim 3, characterized in that: The spray pipe (4) is hinged with a cover plate (42) that corresponds to the spray hole (41) one by one, and the cover plate (42) seals the spray hole (41).

5. A dust suppression device for a concrete mixing plant according to claim 1, characterized in that: A guide block (561) is fixedly connected to the inner wall of the vertical rod (56) near the hopper (1). A guide groove (13) corresponding to the guide block (561) is opened on the inner wall of the hopper (1) and the vertical rod (56). The length direction of the guide groove (13) is set along the height direction of the hopper (1). The guide block (561) is slidably inserted into the guide groove (13).

6. A dust suppression device for a concrete mixing plant according to claim 2, characterized in that: A limiting plate (58) is vertically fixedly connected to the inner side wall of the hopper (1) corresponding to the vertical rod (56). The vertical rod (56) overlaps on the limiting plate (58), and the sealing ball (64) contacts the hole wall of the through hole (31).

7. A dust suppression device for a concrete mixing plant according to claim 4, characterized in that: A torsion spring (43) is sleeved on the hinge shaft of the cover plate (42). One end of the torsion spring (43) is fixedly connected to the cover plate (42), and the other end of the torsion spring (43) is fixedly connected to the spray pipe (4).

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