Closed type pneumatic arc gate for aggregate discharge

Abstract

The application discloses a closed aggregate unloading pneumatic arc door, which comprises a bucket body, an arc door is rotatably connected to the bucket body, a front rubber baffle and a rear rubber baffle are respectively connected below two inclined surfaces of the bucket body, the rear rubber baffle is arranged on the bottom surface of the arc door and cooperates with the front rubber baffle to prevent the aggregate from blocking the arc door when the arc door is closed, rotatable cantilever rotating shafts are arranged in the two side surfaces of the bucket body, the inner ends of the cantilever rotating shafts are connected with corresponding sides of the arc door which is driven to rotate, the outer ends of the cantilever rotating shafts are connected with corresponding sides of the crank arms to transmit torque, each of the crank arms is connected with a piston rod of a cylinder which drives the crank arm to move, and the two cylinders are fixedly installed on the rear side of the bucket body; a sealing connection frame is installed on the lower end of the bucket body outside the arc door, and a sealing flexible connection is connected to the sealing connection frame.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy and hydropower construction machinery technology, specifically relating to a closed-type pneumatic arc gate for unloading aggregates. Background Technology

[0002] The technology of concrete mixing plants has become increasingly sophisticated. While the overall technology of mixing plants has reached a high level, the essential processes of aggregate batching and weighing hopper discharge still require addressing the environmental issue of dust generation. This is particularly true in pre-cooled concrete production using air-cooled aggregate processes. Because the cold air blown into the aggregate bins has a certain pressure and dries the surface moisture of the aggregates, some of the cold air inevitably carries dust out of the aggregate bin's cone outlet through the batching gate, causing severe dust pollution in the aggregate batching area of ​​the mixing plant. Similarly, the discharge of metered aggregates from the weighing hopper also generates dust. These problems have long remained unresolved.

[0003] Existing pneumatic discharge gates for aggregates are driven by one or two cylinders, with the cylinder heads directly hinged to the gate. Even with a sealed flexible connection between the discharge gate and the weighing hopper, gaps remain because the cylinder piston rod must penetrate this connection. Furthermore, the cylinder's oscillation during operation causes these gaps to widen, allowing dust to escape and pollute the environment. Because the sealed flexible connection between the discharge gate frame and the weighing hopper is direct, and the weighing sensor is also located inside this connection, the working environment is harsh, and maintenance is inconvenient. Similarly, dust generation issues also arise from the discharge gate between the aggregate weighing hopper and the centralized hopper. Summary of the Invention

[0004] To address the problems described in the background section, the present invention aims to provide a closed pneumatic arc gate for aggregate unloading, which confines the aggregate batching and weighing hopper discharge material flow and dust within a sealed space, preventing dust overflow. Meanwhile, the sensor is placed outside the sealed space, so as not to affect the weighing accuracy of the aggregate.

[0005] The technical solution adopted in this invention is:

[0006] A closed-type pneumatic arc gate for aggregate unloading, installed between an aggregate bin and an aggregate weighing hopper or between an aggregate weighing hopper and a centralized hopper, is characterized in that: it includes a hopper body, on which an arc gate is rotatably connected to realize the opening and closing of the hopper body's discharge port; a front rubber baffle to prevent aggregate leakage and a rear rubber baffle to prevent aggregate flow from abrading the arc gate are respectively connected to the lower sides of the two inclined surfaces of the hopper body; when the arc gate is closed, the rear rubber baffle is set to fit against the bottom surface of the arc gate and cooperates with the front rubber baffle to prevent aggregate from blocking the arc gate;

[0007] The bucket body is provided with rotatable cantilever shafts on both sides. The inner ends of the cantilever shafts are connected to the corresponding sides of the arc gates that are driven to rotate by them, and the outer ends are connected to the corresponding side crank arms to transmit torque. Each crank arm is connected to the piston rod of the cylinder that drives its action. Both cylinders are installed and fixed on the rear side of the bucket body.

[0008] A sealing connection frame is installed on the outer side of the arc gate at the lower end of the hopper body. A sealing flexible connection for sealing with the aggregate weighing hopper or centralized hopper is connected to the sealing connection frame. This invention uses rubber baffles to prevent aggregate flow from abrading the arc gate and to prevent aggregate from obstructing the arc gate. The drive mechanism that rotates the arc gate is located outside the sealing structure and does not interfere with the sealing flexible connection. That is, throughout the entire process of the drive mechanism opening and closing the arc gate, the entire structure remains fully sealed, thereby confining the aggregate batching and weighing hopper discharge flow and dust within the sealed space, preventing dust overflow. At the same time, the use of a sealing flexible connection does not affect the weighing accuracy of the aggregate.

[0009] Furthermore, the lower flange of the bucket body is provided with a notch for assembling the cantilever pivot and the arc gate, and the connecting flange of the sealing connection frame is provided with a small boss to close the notch, ensuring sealing.

[0010] Furthermore, wear-resistant liners are welded to the two inclined surfaces of the hopper to extend its service life.

[0011] Furthermore, the cantilever shaft is rotatably mounted on the bucket body via a seated spherical bearing.

[0012] Furthermore, the cantilever shaft and the crank arm are connected by a square fit to transmit torque, but an irregular fit is also possible.

[0013] Furthermore, the outer end of the cantilever shaft is a square column, and the upper end of the crank arm is provided with a square hole. The square column and the square hole cooperate to transmit torque.

[0014] Furthermore, the upper end of the hopper is provided with an upper flange for fixed connection with the aggregate bin or aggregate weighing hopper.

[0015] Furthermore, a suspension beam extends rearward from the upper end of the bucket body, and connecting seats for connecting to the central hinge seats of the corresponding cylinders are provided on the lower sides of both ends of the suspension beam.

[0016] Furthermore, the bucket body is provided with a cover, the two inclined surfaces are provided inside the cover and protrude downward from the cover, the upper part of the arc gate is located between the cover and the inclined surfaces, the cantilever shaft passes through the cover, and the sealing connection frame is fixedly connected to the lower end of the cover.

[0017] Furthermore, the front rubber baffle, rear rubber baffle, and sealing connection frame are all bolted to the bucket body. During use, the front rubber baffle, rear rubber baffle, and sealing connection can be replaced without removing the bucket body.

[0018] Compared with the prior art, the significant advantages of this invention include:

[0019] 1) This invention improves the environmental quality of aggregate batching and aggregate weighing hopper discharge in concrete mixing plants (stations), solving the long-standing dust problem. It features a simple structure, clear principle, good operational stability, no increased energy consumption, low manufacturing cost, convenient operation, and environmentally friendly application.

[0020] 2) This invention can be used for both aggregate batching and aggregate weighing hopper discharge, achieving complete dust-free operation without affecting aggregate weighing accuracy, thus having good social and ecological benefits. Attached Figure Description

[0021] Figure 1 This is a side view structural diagram of the present invention.

[0022] Figure 2 This is a schematic diagram of the main structure of the present invention.

[0023] Figure 3 This is a top view of the structure of the present invention.

[0024] Figure 4 This is a side view structural diagram of the bucket body of the present invention.

[0025] Figure 5 This is a schematic diagram of the main structure of the bucket body of the present invention.

[0026] Figure 6 This is a top view of the bucket body of the present invention.

[0027] Figure 7 This is a front view structural schematic diagram of the sealing connection frame of the present invention.

[0028] Figure 8 This is a top view of the sealing connection frame of the present invention.

[0029] Figure 9 This is a side view of the structure of the cantilever pivot after it is connected to the arc gate according to the present invention.

[0030] Figure 10 This is a schematic diagram of the main structure of the present invention after the cantilever pivot is connected to the arc gate.

[0031] Figure 11 This is a side view of the invention in use.

[0032] Figure 12This is the main view of the usage state of the present invention.

[0033] In the diagram: 1. Bucket body, 2. Wear-resistant liner, 3. Front rubber baffle, 4. Sealed spherical bearing, 5. Crank arm, 6. Cylinder, 7. Cantilever shaft, 8. Arc gate, 9. Rear rubber baffle, 10. Sealed connection frame, 101. Small boss, 11. Sealed flexible connection, 12. Cantilever beam, 13. Connecting seat, 14. Cover, 20. Aggregate bin, 30. Aggregate weighing hopper, 40. Centralized hopper, 50. Enclosed pneumatic arc gate for aggregate unloading. Detailed Implementation

[0034] The present invention will be further described below with reference to specific embodiments, but the invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all alternatives, improvements, and equivalents that may be included within the scope of the claims.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] Reference Figure 1-10 This embodiment provides a closed pneumatic arc gate for aggregate unloading, which is installed between the aggregate bin and the aggregate weighing hopper or between the aggregate weighing hopper and the centralized hopper. It includes a hopper body 1, on which an arc gate 8 is rotatably connected to realize the opening and closing of the discharge port of the hopper body 1. A front rubber baffle 3 to prevent aggregate leakage and a rear rubber baffle 9 to prevent aggregate flow from abrading the arc gate are respectively connected to the lower side of the two inclined surfaces of the hopper body 1. When the arc gate 8 is closed, the rear rubber baffle 9 is set to fit against the bottom surface of the arc gate 8 and cooperates with the front rubber baffle 3 to prevent aggregate from blocking the arc gate 8.

[0039] The two sides of the bucket body 1 are provided with rotatable cantilever shafts 7. The inner ends of the cantilever shafts 7 are welded to the corresponding sides of the arc gate 8 that is driven to rotate by them, and the outer ends are connected to the corresponding side of the crank arm 5 to transmit torque. Each crank arm 5 is connected to the piston rod of the cylinder 6 that drives its action. Both cylinders 6 are installed and fixed on the rear side of the bucket body 1.

[0040] A sealing connection frame 10 is installed on the lower end of the hopper body 1 outside the arc gate 8. A sealing flexible connection 11 is connected to the sealing connection frame 10 for sealing connection with the aggregate weighing hopper or centralized hopper. This invention uses a rubber baffle to prevent aggregate flow from abrading the arc gate and to prevent aggregate from jamming the arc gate. The drive mechanism that drives the arc gate 8 is located outside the sealing structure and does not interfere with the sealing flexible connection 11. That is, throughout the entire process of the drive mechanism opening and closing the arc gate 8, the enclosed aggregate unloading pneumatic arc gate remains fully sealed, thereby confining the aggregate batching and weighing hopper discharge flow and dust entirely within the sealed space, preventing dust overflow. Simultaneously, the use of the sealing flexible connection 11 does not affect the weighing accuracy of the aggregate.

[0041] In this embodiment, the upper end of the hopper body 1 is provided with an upper flange for fixed connection with the aggregate bin or aggregate weighing hopper. A cantilever beam 12 extends rearward from the upper end of the hopper body 1, and connecting seats 13 are provided on the lower sides of both ends of the cantilever beam 12 for connection with the middle hinge seat of the corresponding cylinder 6. The hopper body 1 is provided with a cover 14, and the two inclined surfaces are provided inside the cover 14 and protrude downward from the cover 14. The upper part of the arc gate 8 is located between the cover 14 and the inclined surfaces. The cantilever shaft 7 is rotatably mounted on the cover 14 through a seated outer spherical bearing 4. The sealing connection frame 10 is fixedly connected to the lower end of the cover 14.

[0042] In this embodiment, the lower flange surface of the bucket body 1, i.e. the lower flange surface of the cover body 14, is provided with a notch for assembling the cantilever pivot 7 and the arc gate 8. The connecting flange of the sealing connection frame 10 is provided with a small boss 101 that closes the notch to ensure sealing.

[0043] In this embodiment, wear-resistant liners 2 are welded to the two inclined surfaces of the hopper body 1 to extend the service life of the hopper.

[0044] In this embodiment, the cantilever shaft 7 and the crank arm 5 are connected by a square fit to transmit torque; however, an irregular fit is also possible. Specifically, the outer end of the cantilever shaft 7 is a square post, and the upper end of the crank arm 5 is provided with a square hole. The square post and the square hole cooperate to transmit torque. Alternatively, the outer end of the cantilever shaft 7 can be provided with a square hole, and the upper end of the crank arm 5 can be a square post.

[0045] In this embodiment, the front rubber baffle 3, the rear rubber baffle 9, and the sealing connection frame 10 are all connected to the bucket body 1 by bolts. During use, the front rubber baffle 3, the rear rubber baffle 9, and the sealing flexible connection 11 can be replaced without removing the bucket body 1, making maintenance convenient.

[0046] The working process of this invention is as follows:

[0047] like Figure 11 , Figure 12 As shown, when the closed-type pneumatic arc gate 50 for aggregate unloading is used as a batching arc gate, the upper flange of the hopper body 1 is connected to the lower flange of the maintenance plate gate (or aggregate scale hanger) below the cone discharge port of the aggregate bin 20, and the lower sealing flexible connection 11 is connected to the rectangular feed port on the top surface of the aggregate weighing hopper 30; when the closed-type pneumatic arc gate 50 for aggregate unloading is used as the aggregate weighing hopper discharge, the upper flange of the hopper body 1 is connected to the lower flange of the aggregate weighing hopper 30, and the lower sealing flexible connection 11 is connected to the rectangular feed port on the top surface of the centralized hopper 40. The material flow and dust from aggregate batching and weighing hopper discharge are all confined within the sealed space, with no dust overflow. Furthermore, due to the use of a flexible connection seal, the weighing accuracy of the aggregate is not affected.

[0048] like Figure 11 , Figure 12 As shown, when the arc gate 8 is closed, there is no material leakage in any direction. During the short period of opening and closing the arc gate 8, the rear rubber baffle 9 separates the aggregate from the arc gate 8, preventing the aggregate flow from abrading the arc gate 8. The rear rubber baffle 9 also reduces its own wear due to its "softness overcoming rigidity". When the arc gate 8 is fully open and held for a certain period of time, the aggregate flow does not touch the front end of the arc gate 8, thus not causing wear to the arc gate 8. During the closing process of the arc gate 8, the front rubber baffle 3, being soft and elastic, can prevent the aggregate from getting stuck in the arc gate 8.

[0049] The sealed connecting frame 10 is bolted to the bucket body 1, allowing for replacement of the front rubber baffle 3, rear rubber baffle 9, and sealed flexible connection 11 without removing the bucket body 1 during use. Throughout the opening and closing process of the arc gate 8, the aggregate and dust inside the bucket body 1 are completely isolated from the outside atmosphere, preventing dust from overflowing. Furthermore, the use of the sealed flexible connection 11 ensures that the aggregate weighing accuracy remains unaffected.

Claims

1. A closed-type pneumatic arc gate for aggregate unloading, installed between an aggregate bin and an aggregate weighing hopper, or between an aggregate weighing hopper and a centralized hopper, characterized in that: The hopper includes a bucket body, on which an arc gate is rotatably connected to open and close the bucket body's discharge port. A front rubber baffle to prevent aggregate leakage and a rear rubber baffle to prevent aggregate flow from abrading the arc gate are respectively connected to the lower sides of the two inclined surfaces of the bucket body. When the arc gate is closed, the rear rubber baffle is set to fit against the bottom surface of the arc gate and cooperates with the front rubber baffle to prevent aggregate from blocking the arc gate. The bucket body is provided with rotatable cantilever shafts on both sides. The inner ends of the cantilever shafts are connected to the corresponding sides of the arc gates that are driven to rotate by them, and the outer ends are connected to the corresponding side crank arms to transmit torque. Each crank arm is connected to the piston rod of the cylinder that drives its action. Both cylinders are installed and fixed on the rear side of the bucket body. The lower end of the hopper is equipped with a sealing connection frame on the outside of the arc gate, and the sealing connection frame is connected with a sealing flexible connection for sealing connection with the aggregate weighing hopper or the centralized hopper. The upper end of the hopper is provided with an upper flange for fixed connection with the aggregate bin or aggregate weighing hopper; the upper end of the hopper extends rearward with a cantilever beam, and the lower sides of both ends of the cantilever beam are provided with connecting seats for connection with the middle hinge seats of the corresponding cylinders; the hopper is provided with a cover, the two inclined surfaces are provided in the cover and protrude downward from the cover, the upper part of the arc gate is located between the cover and the inclined surfaces, the cantilever shaft passes through the cover, and the sealing connection frame is fixedly connected to the lower end of the cover.

2. The closed-type pneumatic arc gate for aggregate unloading according to claim 1, characterized in that: The lower flange of the bucket body is provided with a notch for assembling the cantilever pivot and the arc gate, and the connecting flange of the sealing connection frame is provided with a small boss that closes the notch.

3. The closed-type pneumatic arc gate for aggregate unloading according to claim 1, characterized in that: Wear-resistant liners are welded to the two inclined surfaces of the bucket body.

4. The closed-type pneumatic arc gate for aggregate unloading according to claim 1, characterized in that: The cantilever shaft is rotatably mounted on the bucket body via a seated spherical bearing.

5. A closed-type pneumatic arc gate for aggregate unloading according to claim 1, characterized in that: The cantilever shaft and the crank arm are connected in a square fit to transmit torque.

6. A closed-type pneumatic arc gate for aggregate unloading according to claim 5, characterized in that: The outer end of the cantilever shaft is a square column, and the upper end of the crank arm is provided with a square hole. The square column and the square hole cooperate to transmit torque.

7. A closed-type pneumatic arc gate for aggregate unloading according to claim 1, characterized in that: The front rubber baffle, rear rubber baffle, and sealing connection frame are all connected to the bucket body by bolts.

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