A device for preventing material spraying and dust emission at the outlet of a bulk hopper

Abstract

The present invention relates to an environmental protection device for preventing material spraying and raising dust at the discharge port of a bulk cargo hopper, comprising a hopper, a guide trough and a conveyor belt, wherein a buffer beam with a herringbone cross-section is horizontally arranged in the hopper, the guide trough is connected to the bottom end of the hopper, and the conveyor belt is located directly below the guide trough; further comprising an air return pipe, a baffle valve and a one-way door; the two ends of the air return pipe are respectively connected to the top end of the guide trough and the upper side wall of the hopper, the baffle valve is movably connected to the inner wall of the hopper, and the baffle valve corresponds to the position of the top end of the air return pipe; the one-way door is movably connected to the side wall of the guide trough, and the one-way door corresponds to the upper and lower positions of the conveyor belt. The present invention prevents material spraying and raising dust at the discharge port of the hopper, can effectively avoid the ejection of dust generated by the spraying of materials, reduce dust pollution, reduce material loss, reduce the labor intensity of cleaning personnel, and protect the platform and surrounding environment of the dock.

Description

Technical Field

[0001] The present invention relates to the field related to port ship unloaders, and in particular to a device for preventing material blowout and raising dust from a bulk cargo hopper discharge port. Background Art

[0002] Ship unloader is a special machine that uses continuous conveying machinery to make a head that can lift bulk materials, or has the ability to reclaim materials by itself, or is equipped with a reclaiming and feeding device to continuously lift bulk materials out of the ship's hold, and then unload them to the arm or frame and transport them to the shore main conveying system. The use of ship unloader can greatly improve unloading efficiency.

[0003] When the ship unloader is working, the grab bucket grabs the materials on the transport ship, moves to the top of the hopper and releases them. The materials fall into the hopper due to gravity, are buffered and decelerated by the buffer beam, and then fall out of the discharge port at the bottom of the hopper onto the conveyor belt and are transported and output via the conveyor belt.

[0004] When the material to be unloaded is powdery, the dust generated by the falling material will be ejected from the front and rear ends of the material guide chute, which will not only cause the loss of material, but also cause pollution to the dock platform and the surrounding environment, directly affecting the surrounding air quality, and the labor intensity of the cleaning personnel is relatively high. Summary of the Invention

[0005] The purpose of the present invention is to provide an environmental protection device for preventing material spraying and dust at the discharge port of a bulk cargo hopper, which can prevent material spraying and dust at the discharge port of the hopper, effectively avoid the dust spraying caused by the spraying of materials, reduce dust pollution, reduce material loss, reduce the labor intensity of cleaning personnel, and protect the platform and surrounding environment of the dock.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A device for preventing material from being sprayed out and raising dust at the discharge port of a bulk cargo hopper comprises a hopper, a material guide trough and a conveyor belt, wherein a buffer beam with a herringbone cross-section is horizontally arranged in the hopper, the material guide trough is connected to the bottom end of the hopper, and the conveyor belt is located directly below the material guide trough; the device also comprises an air return pipe, a baffle valve and a one-way door; the two ends of the air return pipe are respectively connected to the top end of the material guide trough and the upper side wall of the hopper, the baffle valve is movably connected to the inner wall of the hopper, and the baffle valve corresponds to the position of the top end of the air return pipe; the one-way door is movably connected to the side wall of the material guide trough, and the one-way door corresponds to the upper and lower positions of the conveyor belt.

[0008] Furthermore, there are two return air pipes, which are respectively located at the two ends of the top end of the material guide trough in the length direction; the connection between the return air pipe and the hopper is specifically located directly below the two ends of the buffer beam.

[0009] Furthermore, the outline of the baffle valve is larger than the outline of the interface between the return air pipe and the hopper.

[0010] Furthermore, a door seat is provided on the side wall of the material guide trough, and the pin shafts at both ends of the top of the door panel of the one-way door pass through the sliding groove of the door seat, and the pin shafts can slide along the sliding groove.

[0011] Furthermore, the door seat is arranged vertically, the pin shaft of the one-way door is arranged horizontally and the axis is perpendicular to the conveying direction of the conveyor belt.

[0012] Furthermore, a counterweight is provided above the one-way door, and the counterweight is connected to the pin of the one-way door via a connecting rod. The counterweight is specifically located on the side of the pin facing away from the door panel.

[0013] The beneficial effects of the present invention are: a device for preventing material from being sprayed out and raising dust from the discharge port of a bulk hopper, which, by arranging an air return pipe, guides the dust generated by the impact back into the hopper along the air flow, and blocks the dust from being sprayed out from both ends of the guide chute through a one-way door, and prevents material from being sprayed out and raising dust from the discharge port of the hopper, which can effectively avoid the dust generated by the spraying of the material, reduce dust pollution, improve air quality, reduce material loss, thereby reducing the waste of raw materials, and at the same time reduce the labor intensity of the cleaning personnel, and protect the platform and surrounding environment of the dock. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view sectional view of the overall structure of a bulk hopper discharge port anti-blowout and dust environmental protection device of the present invention.

[0015] Figure 2 This is a schematic diagram of the overall structure of a bulk hopper discharge port anti-blowout and dust environmental protection device from a right perspective according to the present invention.

[0016] Figure 3 This is a partial structural schematic diagram of the one-way door of a bulk hopper discharge port anti-blowout and dust environmental protection device of the present invention.

[0017] In the figure: 1. Hopper; 2. Buffer beam; 3. Material guide chute; 4. Return air pipe; 5. Baffle valve; 6. Conveyor belt; 7. Door seat; 8. Counterweight; 9. Connecting rod; 10. One-way door. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] refer to Figures 1 to 3The hopper 1 has a plurality of hoppers 1 and a plurality of hoppers 1 connected to each other, and the hopper 1 has a plurality of hoppers 1 connected to each other, and the plurality of hoppers 1 are connected to each other by a plurality of means.

[0020] There are two return air pipes 4 , which are respectively located at both ends of the top of the guide trough 3 in the length direction; the connection between the return air pipe 4 and the hopper 1 is specifically located directly below the two ends of the buffer beam 2 .

[0021] The outline of the baffle valve 5 is larger than the outline of the interface between the return air pipe 4 and the hopper 1 , that is, the baffle valve 5 can completely cover the outline of the interface between the return air pipe 4 and the hopper 1 .

[0022] A door seat 7 is provided on the side wall of the material guide trough 3, and the pin shafts at both ends of the top of the door panel of the one-way door 10 pass through the slide groove of the door seat 7, and the pin shafts can slide along the slide groove; when there is a lot of material on the conveyor belt 6, the pin shaft of the one-way door 10 slides upward along the slide groove, which is conducive to the output of the material.

[0023] The door seat 7 is arranged vertically, and the pin shaft of the one-way door 10 is arranged horizontally and the axis is perpendicular to the conveying direction of the conveyor belt 6, so that the one-way door 10 can be flipped open along the direction of the conveyor belt 6.

[0024] A counterweight block 8 is provided above the one-way door 10. The counterweight block 8 is connected to the pin shaft of the one-way door 10 through a connecting rod 9. The counterweight block 8 is specifically located on the side of the pin shaft away from the door panel. The counterweight block 8 specifically plays a counterweight role, thereby facilitating the material on the conveyor belt 6 to push the one-way door 10 to open.

[0025] The working principle of the present invention is as follows: after the grab bucket of the ship unloader grabs the material from the open-air cabin of the transport ship, it moves to the top of the hopper 1 and then releases it. The material falls into the hopper 1 due to gravity, first falling on the buffer beam 2 for buffering and deceleration, then buffering and decelerating through the inner wall of the hopper 1, and then falls into the guide chute 3 and finally falls on the conveyor belt 6; in the process of the material falling, the pressure difference of the air flow and the dust are generated due to the impact of the fall. The movement direction of the air flow and the dust in the guide chute 3 is as follows: Figure 1As shown by the arrow in the guide trough 3 inside, the airflow mixed with dust is blocked by the one-way door 10, so it enters the bottom end of the return air pipe 4 and moves upward in the direction indicated by the arrow in the return air pipe 4 until it reaches the top of the return air pipe 4, opens the baffle valve 5, and enters the hopper 1, realizing material recovery and dust suppression; since the baffle valve 5 is located below the buffer beam 2, its flipping operation is not affected by the impact of the falling material; the conveyor belt 6 moves horizontally in the direction indicated by the arrow to transfer the material to the outside of the guide trough 3. Under the action of the material on the conveyor belt 6, the one-way door 10 is flipped along the pin shaft by friction to a certain angle, and the pin shaft can slide upward along the slide groove of the door seat 7, which is beneficial to the output of the material while ensuring that the airflow in the guide trough 3 is blocked.

[0026] When the material is continuously conveyed, the door panel of the one-way door 10 is turned upwards, and the posture is as follows: Figure 3 As shown, the side of the door panel facing the interior of the material guide chute 3 is in direct contact with the material.

[0027] The door panel of the one-way door 10 is thicker and therefore heavier, which can prevent the airflow from breaking the door panel and overflowing. During the turning process of the one-way door 10, the counterweight 8 acts as a counterweight to prevent the material on the conveyor belt 6 from being difficult to push the door panel of the one-way door 10 to turn and open.

[0028] The door panel is in direct contact with the material on the side facing the inside of the material guide trough 3, which can block the airflow; although it cannot achieve complete blocking, the use of the return air pipe 4 and the one-way door 10 can greatly reduce the ejection of airflow mixed with dust compared to the existing situation.

[0029] In the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] The above embodiments are used to further illustrate the present invention, but the present invention is not limited to these specific embodiments. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be understood to be within the scope of protection of the present invention.

Claims

1. A device for preventing material from being blown out and raising dust at a bulk hopper outlet, comprising a hopper (1), a guide chute (3) and a conveyor belt (6), wherein a buffer beam (2) with a herringbone cross section is horizontally arranged in the hopper (1), the guide chute (3) is connected to the bottom end of the hopper (1), and the conveyor belt (6) is located directly below the guide chute (3); and characterized in that: It also includes a return air pipe (4), a baffle valve (5) and a one-way door (10); the two ends of the return air pipe (4) are respectively connected to the top of the guide trough (3) and the upper side wall of the hopper (1); the baffle valve (5) is movably connected to the inner wall of the hopper (1); the baffle valve (5) corresponds to the position of the top of the return air pipe (4); the one-way door (10) is movably connected to the side wall of the guide trough (3); the one-way door (10) corresponds to the upper and lower positions of the conveyor belt (6); the return air pipe (4) is There are two of them and they are located at both ends of the top of the guide trough (3) in the length direction; the connection between the return air pipe (4) and the hopper (1) is specifically located directly below the two ends of the buffer beam (2); the outline of the baffle valve (5) is larger than the outline of the interface between the return air pipe (4) and the hopper (1); the baffle valve (5) completely covers the outline of the interface between the return air pipe (4) and the hopper (1); the baffle valve (5) is located below the buffer beam (2), and the flipping operation of the baffle valve (5) is not affected by the impact of falling materials.

2. The device for preventing blowout and raising dust at the discharge port of a bulk hopper according to claim 1, characterized in that: A door seat (7) is provided on the side wall of the guide trough (3), and the pins at both ends of the top of the door panel of the one-way door (10) pass through the sliding groove of the door seat (7), and the pins can slide along the sliding groove.

3. The device for preventing blowout and raising dust at the discharge port of a bulk hopper according to claim 2, characterized in that: The door seat (7) is arranged vertically, and the pin shaft of the one-way door (10) is arranged horizontally, with the axis being perpendicular to the conveying direction of the conveyor belt (6).

4. The device for preventing blowout and raising dust at the discharge port of a bulk hopper according to claim 3, characterized in that: A counterweight (8) is provided above the one-way door (10), and the counterweight (8) is connected to the pin of the one-way door (10) via a connecting rod (9). The counterweight (8) is specifically located on the side of the pin facing away from the door panel.

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