Coal overflow protection device for coal drop pipe

Abstract

The invention discloses a coal falling pipe coal overflow protection device, and relates to the technical field of coal falling pipe coal overflow protection, the coal falling pipe coal overflow protection device comprises a coal receiving assembly, the coal receiving assembly comprises a coal receiving box, the coal receiving box is arranged on one side of a belt coal conveyer under a coal falling pipe, and the coal receiving box is provided with a coal receiving groove with a top opening and is used for receiving coal falling pipe coal overflow; the suspension assembly comprises a pull rope, a static pulley and a pulley support. On the basis that an original mechanical material blocking switch is reserved, the additional coal overflow protection device is provided, through mutual cooperation of the coal receiving assembly and the hanging assembly, when coal in the coal falling pipe rises and overflows, overflowing coal briquettes can be received in time through the coal receiving assembly, and under the action of gravity, the coal is prevented from overflowing. The emergency stop switch of the belt coal conveyer is rapidly pulled through the pull rope in the suspension assembly, so that the belt stops running, coal briquette accumulation and further coal overflow are avoided, and the emergency stop device can be used as the last defense line to prevent coal overflow accidents under the condition that a mechanical material blocking switch fails.

Description

Technical Field

[0001] The present invention relates to the technical field of over - flow coal protection for coal dropping pipes, and particularly relates to an over - flow coal protection device for coal dropping pipes. Background Art

[0002] During the operation of fuel unloading and conveying in a power plant, the phenomenon of coal overflow in the coal dropping pipe at the head of the coal conveying belt conveyor often occurs. This problem is usually caused by factors such as coal quality changes. Currently, the mechanical blockage switch installed in the coal dropping pipe is the main means of detecting coal overflow. The working principle of this switch is: when the coal volume in the coal dropping pipe rises and squeezes the switch, when the vertically suspended switch deviates from the vertical position by more than 25 degrees under the action of external force, the internal contacts are triggered to act, resulting in the disconnection of the belt conveyor control circuit, thereby stopping the belt from running. However, the existing technology has the following limitations:

[0003] Unilateral installation of blockage switch: The blockage switch is only installed on one side of the coal dropping pipe, resulting in the inability to detect the accumulated coal starting from the other side. This accumulated coal may eventually overflow, and the blockage switch cannot provide protection.

[0004] Angle detection limitation: When the coal gradually accumulates in the coal dropping pipe and touches the blockage switch, due to the accumulated coal on both sides of the blockage switch, the angle by which the switch deviates from the vertical position is insufficient to trigger the protection action.

[0005] These limitations cause the existing blockage switch to be unable to effectively prevent coal overflow in some cases, which may lead to the long - term shutdown of the entire coal unloading and conveying system, seriously affecting production operations. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is that the existing mechanical blockage switch may not be able to detect the coal overflow situation in time, resulting in the long - term shutdown of the entire coal unloading and conveying system.

[0007] The above - mentioned technical problem is solved by the following technical solution: The present invention provides an over - flow coal protection device for a coal dropping pipe, including a coal receiving component and a pulling rope; the coal receiving component is arranged on one side of the belt conveyor directly below the coal dropping pipe and is used for receiving the overflow coal from the coal dropping pipe; one end of the pulling rope is connected to the emergency stop switch of the belt conveyor, and the other end of the pulling rope is connected to the coal receiving component and is used for suspending the coal receiving component in mid - air; the overall weight of the coal receiving component increases as the amount of overflow coal received from the coal dropping pipe increases, and then the emergency stop switch is pulled through the pulling rope to close the belt conveyor, realizing emergency stop protection.

[0008] In a preferred embodiment of the over - flow coal protection device for a coal dropping pipe of the present invention: The coal receiving component includes a coal receiving box, and the coal receiving box is provided with a coal receiving trough with an open top. The overflow coal from the coal dropping pipe enters the coal receiving trough through the open top of the coal receiving box.

[0009] In a preferred embodiment of the coal chute overflow protection device of the present invention: The coal receiving chute includes a columnar section and a conical section. The columnar section is arranged along the axial direction of the coal receiving box, and the end far from the conical section is the opening of the coal receiving box.

[0010] In a preferred embodiment of the coal chute overflow protection device of the present invention: It further includes a suspension assembly, which includes a fixed pulley and a pulley bracket. Wherein, one end of the pulley bracket is fixedly connected to the outer shell on one side of the belt conveyor, the fixed pulley is movably installed on the pulley bracket, and one end of the pulling rope connecting the coal receiving assembly passes through the fixed pulley.

[0011] In a preferred embodiment of the coal chute overflow protection device of the present invention: The coal receiving assembly further includes spring telescopic rods arranged on the top of the coal receiving box. The spring telescopic rods are evenly distributed along the outer circumference of the coal receiving box, and one end of the spring telescopic rod is hinged to the coal receiving box.

[0012] In a preferred embodiment of the coal chute overflow protection device of the present invention: The coal receiving assembly further includes a suspension ring and a connecting rope tied to the suspension ring. The number of the connecting ropes is the same as the number of the spring telescopic rods, and the end of the connecting rope far from the suspension ring is tied to the movable end of the adjacent spring telescopic rod.

[0013] In a preferred embodiment of the coal chute overflow protection device of the present invention: The end of the connecting rope far from the suspension ring is provided with a hanging sleeve, and the movable end of the spring telescopic rod is provided with a hanging groove. The hanging sleeve can be sleeved on the hanging groove of the spring telescopic rod to tighten the connecting rope.

[0014] In a preferred embodiment of the coal chute overflow protection device of the present invention: One end of the pulling rope connecting the coal receiving assembly passes through the fixed pulley and is tied to the center of the bottom of the coal receiving chute.

[0015] In a preferred embodiment of the coal chute overflow protection device of the present invention: One end of the pulling rope connecting the coal receiving assembly passes through the fixed pulley and is tied to the suspension ring.

[0016] In a preferred embodiment of the coal chute overflow protection device of the present invention: A rope buckle is provided on the connecting rope for adjusting the length of the connecting rope.

[0017] Advantages of the present invention: On the basis of retaining the original mechanical blockage switch, the present invention provides an additional overflow coal protection device. Through the mutual cooperation of the coal receiving component and the suspension component, when the coal volume in the coal dropping pipe rises and overflows, the coal receiving component can timely receive the overflowing coal blocks, and under the action of gravity, the emergency stop switch of the belt conveyor is quickly pulled by the pull rope in the suspension component, so that the belt stops running, thereby avoiding the accumulation of coal blocks and further overflow of coal. It can serve as the last line of defense to prevent the occurrence of overflow coal accidents in the case of the failure of the mechanical blockage switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present invention and do not limit the present invention. Among them:

[0019] Figure 1 Schematic structural diagram of the direct connection between the pull rope and the coal receiving box in the present invention.

[0020] Figure 2 Schematic structural diagram of the connection between the pull rope and the suspension ring in the present invention.

[0021] Figure 3 Schematic structural diagram of the coal receiving box when it is tilted in the present invention.

[0022] Figure 4 Schematic structural diagram of the adjusted connection rope in the present invention.

[0023] Figure 5 For Figure 2 Enlarged view of part A in

[0024] Figure 6 Schematic three-dimensional structure diagram of the present invention.

[0025] In the figure: 1. Coal receiving component; 11. Coal receiving box; 11a. Coal receiving groove; 11a-1. Columnar section; 11a-2. Conical section; 12. Spring telescopic rod; 12a. Hanging groove; 13. Suspension ring; 14. Connection rope; 14a. Hanging sleeve; 15. Rope buckle; 2. Pull rope; 3. Suspension component; 31. Static pulley; 32. Pulley bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the specific embodiments and the drawings.

[0027] The terms used in the present invention are those general terms currently widely used in the art in consideration of the functions of the present invention. However, these terms may vary according to the intention of those of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but based on the meanings of the terms and the overall description of the present invention.

[0028] Referring to Figures 1 to 6 , this embodiment provides a coal chute overflow protection device, including a coal receiving assembly 1, a pull rope 2, and a suspension assembly 3. Among them, the coal receiving assembly 1 is arranged on one side of the belt conveyor directly below the coal chute for receiving the overflow coal from the coal chute; one end of the pull rope 2 is connected to the emergency stop switch of the belt conveyor, and the other end of the pull rope 2 is connected to the coal receiving assembly 1 for suspending the coal receiving assembly 1 in mid-air; the overall weight of the coal receiving assembly 1 increases as the amount of overflow coal received from the coal chute increases, and then the emergency stop switch is pulled through the pull rope 2 to close the belt conveyor, realizing emergency stop protection.

[0029] As Figure 1 and Figure 6 shown, as an alternative embodiment, the suspension assembly 3 includes a static pulley 31 and a pulley bracket 32; among them, one end of the pulley bracket 32 is fixedly connected to the outer shell of one side of the belt conveyor, the static pulley 31 is movably installed on the pulley bracket 32, and the end of the pull rope 2 connected to the coal receiving assembly 1 passes through the static pulley 31. The static pulley 31 plays a role in pulling the pull rope 2 and cooperates with the pull rope 2 to suspend the coal receiving assembly 1 in mid-air.

[0030] As Figure 1 shown, as an alternative embodiment, the coal receiving assembly 1 includes a coal receiving box 11 for receiving the overflow coal from the coal chute; one end of the pull rope 2 is connected to the coal receiving box 11, and the other end of the pull rope 2 is connected to the emergency stop switch of the belt conveyor.

[0031] As Figure 1 shown, as an alternative embodiment, the coal receiving box 11 is arranged on one side of the belt conveyor directly below the coal chute. The coal receiving box 11 is provided with a coal receiving groove 11a with an open top. When the coal chute overflows, a large number of coal blocks fall from the outlet of the coal chute onto the belt conveyor. The belt conveyor cannot receive all the falling coal blocks. Some coal blocks fall from both sides of the belt conveyor and fall into the coal receiving groove 11a of the coal receiving box 11. As the number of coal blocks in the coal receiving groove 11a continuously increases, the total weight of the coal receiving box 11 and the coal blocks increases, and along with the impact force of the falling coal blocks on the coal receiving box 11, the coal receiving box 11 has a tendency to move downward, and the emergency stop switch of the belt conveyor is pulled through the pull rope 2 to stop the operation of the belt conveyor.

[0032] Specifically, the coal receiving box 11 is a columnar box with a bottom surface being a regular polygon or a regular circle. Refer to Figure 1 As shown, the coal receiving box 11 is a columnar box with a square bottom surface.

[0033] As Figure 1 shown, as an alternative embodiment, the coal collecting trough 11a includes a columnar section 11a-1 and a conical section 11a-2. The columnar section 11a-1 is arranged along the axial direction of the coal receiving box 11, and the end away from the conical section 11a-2 is the opening of the coal receiving box 11. Refer to Figure 1 As shown, the design of the conical section 11a-2 enables the coal blocks entering the coal collecting trough 11a to quickly converge towards the center, avoiding the accumulation of coal blocks on one side, which may cause the coal receiving box 11 hovering in mid-air to shake, and thus unable to receive subsequent falling coal, further resulting in the total weight of the coal receiving box 11 and the coal blocks inside it never exceeding the critical value for pulling the emergency stop switch, causing the belt conveyor to be unable to stop; or avoiding the accumulation of coal blocks on one side, resulting in the inclination of the coal receiving box 11, that is, the top opening of the coal receiving box 11 is inclined, causing the coal blocks to be ejected after entering the coal collecting trough 11a, and further resulting in the total weight of the coal receiving box 11 and the coal blocks inside it never exceeding the critical value for pulling the emergency stop switch, causing the belt conveyor to be unable to stop.

[0034] Specifically, one end of the pull rope 2 connected to the coal receiving box 11 is tied to the center of the bottom of the coal collecting trough 11a.

[0035] Specifically, the pull rope 2 is a flexible steel wire rope.

[0036] As Figures 2 to 6 shown, as an alternative embodiment, the coal receiving assembly 1 includes a coal receiving box 11 with a coal collecting trough 11a inside and a top opening. The coal receiving box 11 is arranged on one side of the belt conveyor directly below the coal dropping pipe for receiving the overflow coal from the coal dropping pipe.

[0037] As Figures 2 to 6 shown, as an alternative embodiment, a spring telescopic rod 12 is provided at the top of the coal receiving box 11. The spring telescopic rods 12 are evenly distributed along the outer circumference of the coal receiving box 11, and one end of the spring telescopic rod 12 is hinged to the coal receiving box 11. Specifically, refer to Figure 2 and 6 shown, the coal receiving box 11 is a columnar box with a square bottom surface and a top opening, and there are four spring telescopic rods 12 which are respectively arranged at the four corners of the top of the coal receiving box 11.

[0038] As Figures 2 to 6 shown, as an alternative embodiment, the coal receiving assembly 1 further includes a suspension ring 13 and a connecting rope 14 tied to the suspension ring 13. The number of the connecting ropes 14 is the same as that of the spring telescopic rods 12, and the end of the connecting rope 14 away from the suspension ring 13 is tied to the movable end of the adjacent spring telescopic rod 12.

[0039] Specifically, during use, the coal receiving box 11 is arranged on one side of the belt conveyor directly below the coal dropping pipe with its opening facing upward. Through the mutual cooperation among the pull rope 2, the static pulley 31, and the pulley bracket 32, the coal receiving box 11 is suspended in mid-air. When the coal dropping pipe overflows with coal, it receives the coal blocks that fall from the side of the belt conveyor, and as the number of coal blocks in the coal receiving groove 11a increases, the total weight of the coal receiving box 11 and the coal blocks inside it increases. Furthermore, the emergency stop switch of the belt conveyor is pulled by the pull rope 2, causing the belt conveyor to stop running. Refer to Figure 2 and 6 As shown, through the cooperation of the suspension ring 13 and the four groups of connecting ropes 14, by utilizing the tension between the four groups of connecting ropes 14 and the coal receiving box 11, the suspension balance of the coal receiving box 11 is maintained, enabling the coal receiving box 11 to remain stable under a certain wind force and a certain vibration. Refer to Figure 2 and 6 As shown, by setting the spring telescopic rod 12, it plays a buffering role to prevent the impact force of the falling coal blocks on the coal receiving box 11 from being too large, causing the connecting rope 14 or the pull rope 2 to break.

[0040] As Figures 2 to 6 shown, as an optional implementation, a hanging sleeve 14a is provided at one end of the connecting rope 14 away from the suspension ring 13, and a hanging groove 12a is provided at the movable end of the spring telescopic rod 12; the hanging sleeve 14a can be sleeved on the hanging groove 12a of the spring telescopic rod 12 to tighten the connecting rope 14, as Figure 5 shown. Specifically, by utilizing the cooperation of the hanging sleeve 14a and the hanging groove 12a, the coal receiving box 11 can be disassembled more quickly, facilitating the removal of the coal receiving box 11 after the belt conveyor stops running, thereby facilitating the pouring out of the coal blocks in the coal receiving box 11.

[0041] As Figures 2 to 6 shown, as an optional embodiment, a rope buckle 15 is provided on the connecting rope 14 for adjusting the length of the connecting rope 14. Specifically, refer to Figure 3 shown, by setting the rope buckle 15, the length of the connecting rope 14 can be flexibly adjusted, that is, the inclination angle of the coal receiving box 11 is adjusted, and further the angle at which the coal blocks enter the coal receiving box 11 is changed. At the same time, refer to Figure 4 shown, by setting the rope buckle 15, the relative lengths of the two side connecting ropes 14 are changed, causing the coal receiving box 11 to move horizontally and adjusting the position of the coal receiving box 11 to ensure that the coal blocks can fall into the coal receiving groove 11a of the coal receiving box 11.

[0042] In summary, on the basis of retaining the original mechanical blockage switch, the present invention provides an additional coal overflow protection device. Through the mutual cooperation of the coal receiving assembly 1, the pull rope 2, and the suspension assembly 3, when the coal volume in the coal dropping pipe rises and overflows, the coal receiving assembly 1 can timely receive the overflowing coal blocks, and under the action of gravity, the pull rope 2 in the suspension assembly 3 quickly pulls the emergency stop switch of the belt conveyor, causing the belt to stop running, thereby avoiding the accumulation of coal blocks and further coal overflow. It can serve as the last line of defense in case the mechanical blockage switch fails to prevent the occurrence of coal overflow accidents.

[0043] Finally, it should be pointed out that the methods and devices described in detail above are only examples, and those skilled in the art can modify these examples in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A coal chute overflow protection device, characterized in that: It includes a coal receiving component (1) and a pull rope (2); The coal receiving component (1) is arranged on one side of the belt conveyor directly below the coal dropping pipe and is used to receive the overflow coal from the coal dropping pipe; One end of the pull rope (2) is connected to the emergency stop switch of the belt conveyor, and the other end of the pull rope (2) is connected to the coal receiving component (1) for suspending the coal receiving component (1) in mid-air; The overall weight of the coal receiving component (1) increases as the overflow coal received from the coal dropping pipe increases, and then the emergency stop switch is pulled through the pull rope (2) to turn off the belt conveyor and achieve emergency stop protection.

2. The coal chute overflow protection device according to claim 1, characterized in that: The coal receiving component (1) includes a coal receiving box (11), and the coal receiving box (11) is provided with a coal receiving trough (11a) with an open top. The overflow coal from the coal dropping pipe enters the coal receiving trough (11a) through the open top of the coal receiving box (11).

3. The coal chute overflow protection device according to claim 1, characterized in that: The coal receiving trough (11a) includes a columnar section (11a-1) and a conical section (11a-2). The columnar section (11a-1) is arranged along the axis of the coal receiving box (11), and the end away from the conical section (11a-2) is the opening of the coal receiving box (11).

4. The coal chute overflow protection device according to claim 2 or 3, characterized in that: It further includes a suspension component (3), which includes a static pulley (31) and a pulley bracket (32); Among them, one end of the pulley bracket (32) is fixedly connected to the outer shell of one side of the belt conveyor, the static pulley (31) is movably installed on the pulley bracket (32), and the end of the pull rope (2) connecting the coal receiving component (1) passes through the static pulley (31).

5. The coal chute overflow protection device according to claim 4, characterized in that: The coal receiving component (1) further includes a spring telescopic rod (12) arranged on the top of the coal receiving box (11). The spring telescopic rods (12) are evenly distributed along the outer circumference of the coal receiving box (11), and one end of the spring telescopic rod (12) is hinged to the coal receiving box (11).

6. The coal chute overflow protection device according to claim 5, characterized in that: The coal receiving component (1) further includes a suspension ring (13) and a connecting rope (14) tied to the suspension ring (13). The number of the connecting ropes (14) is the same as that of the spring telescopic rods (12), and the end of the connecting rope (14) away from the suspension ring (13) is tied to the movable end of the adjacent spring telescopic rod (12).

7. The coal chute overflow protection device according to claim 6, characterized in that: The end of the connecting rope (14) away from the suspension ring (13) is provided with a hanging sleeve (14a), and the movable end of the spring telescopic rod (12) is provided with a hanging groove (12a); the hanging sleeve (14a) can be sleeved on the hanging groove (12a) of the spring telescopic rod (12) to tighten the connecting rope (14).

8. The coal chute overflow protection device according to claim 4, characterized in that: The end of the pull rope (2) connecting the coal receiving component (1) passes through the static pulley (31) and is tied to the center of the bottom of the coal receiving trough (11a).

9. The coal chute overflow protection device according to claim 7, characterized in that: The end of the pull rope (2) connecting the coal receiving component (1) passes through the static pulley (31) and is tied to the suspension ring (13).

10. The coal chute overflow protection device according to claim 7 or 9, characterized in that: A rope buckle (15) is arranged on the connecting rope (14) for adjusting the length of the connecting rope (14).

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