Coal overflow protection device for coal chute

Abstract

The present invention relates to the technical field of coal overflow protection for coal chutes. Disclosed is a coal overflow protection device for a coal chute, said device comprising: a coal receiving assembly, comprising a coal receiving box, the coal receiving box being arranged on one side of a belt coal conveyor directly below a coal chute, and the coal receiving box being provided with a coal collecting cavity with an open top for receiving coal overflowing from the coal chute; and a suspension assembly, comprising a pull rope, a fixed pulley and a pulley support. On the basis of retaining an original mechanical blockage switch, the present invention provides an additional coal overflow protection device, in which the coal receiving assembly and the suspension assembly cooperate with each other; when the amount of coal in the coal chute rises and coal overflows, the coal receiving assembly can receive the overflowed coal blocks in a timely manner, and under the action of gravity, the pull rope in the suspension assembly can quickly pull an emergency stop switch on the belt coal conveyor to stop operation of the belt, so as to avoid coal block accumulation and further coal overflow, thus providing the last line of defense to prevent coal overflow accidents in case the mechanical blockage switch fails.

Description

A coal spill protection device for coal chutes Technical Field

[0001] This invention relates to the field of coal spill protection technology for coal chutes, and more particularly to a coal spill protection device for coal chutes. Background Technology

[0002] During the coal conveying and unloading operation of power plants, coal overflow from the coal chute at the head of the conveyor belt frequently occurs. This problem is usually caused by factors such as changes in coal quality. Currently, mechanical blockage switches installed in the coal chute are the main means of detecting coal overflow. The working principle of this switch is: when the amount of coal in the chute rises and squeezes the switch, the vertically suspended switch, when subjected to external force and deviating from its vertical position by more than 25 degrees, triggers the internal contacts to operate, causing the conveyor belt control circuit to disconnect, thereby stopping the belt from running. However, the existing technology has the following limitations:

[0003] Single-sided installation of material blockage switch: If a material blockage switch is installed on only one side of the coal chute, it will be impossible to detect coal accumulation starting from the other side. This accumulated coal may eventually overflow, and the material blockage switch will not provide protection.

[0004] Angle detection limitation: When coal gradually accumulates in the coal chute and encounters the blockage switch, the angle of the switch deviating from the vertical position is insufficient due to the coal accumulation on both sides of the blockage switch, thus failing to trigger the protection action.

[0005] These limitations mean that existing blocking switches are ineffective in preventing coal spills in certain situations, potentially leading to prolonged shutdowns of the entire coal conveying and unloading system and severely impacting production operations. Summary of the Invention

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0007] In view of the fact that the existing mechanical blocking switches may not be able to detect coal overflow in time, which leads to the long-term shutdown of the entire coal conveying and unloading system and seriously affects production operations, this invention is proposed.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a coal spillage protection device for a coal chutes, comprising: a coal receiving assembly, which includes a coal receiving box, the coal receiving box being disposed on one side of a belt conveyor directly below the coal chutes, the coal receiving box having a coal receiving trough with a top opening for receiving coal spillage from the coal chutes; and a suspension assembly, which includes a pull rope, a stationary pulley, and a pulley bracket; wherein, one end of the pulley bracket is fixedly connected to one side of the outer casing of the belt conveyor, the stationary pulley is movably mounted on the pulley bracket, one end of the pull rope passes through the stationary pulley and is connected to the emergency stop switch of the belt conveyor, and the other end of the pull rope is connected to the coal receiving assembly for suspending the coal receiving assembly in mid-air.

[0009] As a preferred embodiment of the coal spill protection device for the coal chute described in this invention, the coal receiving box is a cylindrical box with a bottom surface that is either polygonal or circular.

[0010] As a preferred embodiment of the coal spillage protection device of the coal chute of the present invention, the coal receiving trough includes a columnar section and a conical section, wherein the columnar section is arranged axially along the coal receiving box and the end away from the conical section is the opening of the coal receiving box.

[0011] In a preferred embodiment of the coal spill protection device for the coal chute described in this invention, one end of the pull rope is tied to the center of the bottom of the coal receiving trough.

[0012] As a preferred embodiment of the coal spill protection device for the coal chute described in this invention, the coal receiving assembly further includes a spring telescopic rod disposed on the top of the coal receiving box. The spring telescopic rod is evenly distributed along the outer periphery of the coal receiving box, and one end of the spring telescopic rod is hinged to the coal receiving box.

[0013] As a preferred embodiment of the coal spill protection device for the coal chute 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 connecting ropes is the same as the number of spring telescopic rods, and the end of the connecting rope away from the suspension ring is tied to the movable end of the adjacent spring telescopic rod.

[0014] As a preferred embodiment of the coal spill protection device for the coal chute described in this invention, the end of the connecting rope away from the suspension ring is provided with a sleeve, and the movable end of the spring telescopic rod is provided with a hanging groove; the sleeve can be fitted onto the hanging groove of the spring telescopic rod to tighten the connecting rope.

[0015] In a preferred embodiment of the coal spill protection device for the coal chute described in this invention, one end of the pull rope is tied to the suspension ring.

[0016] In a preferred embodiment of the coal spill protection device for the coal chute described in this invention, the pull rope is a flexible steel wire rope.

[0017] As a preferred embodiment of the coal spill protection device for the coal chute described in this invention, the connecting rope is provided with a rope buckle for adjusting the length of the connecting rope.

[0018] The beneficial effects of this invention are as follows: While retaining the original mechanical material blockage switch, this invention provides an additional coal spillage protection device. Through the cooperation of the coal receiving component and the suspension component, when the amount of coal in the coal drop pipe rises and overflows, the coal receiving component can promptly receive the overflowing coal chunks. Under the action of gravity, the pull rope in the suspension component quickly pulls the emergency stop switch of the belt conveyor, stopping the belt from running. This prevents coal chunks from accumulating and further overflowing. It can serve as a last line of defense to prevent coal spillage accidents in the event of failure of the mechanical material blockage switch. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 is a schematic diagram of the structure in which the pull rope is directly connected to the coal receiving box in this invention.

[0021] Figure 2 is a schematic diagram of the connection between the pull rope and the suspension ring in this invention.

[0022] Figure 3 is a schematic diagram of the structure of the coal receiving box when tilted in this invention.

[0023] Figure 4 is a schematic diagram of the structure after the connecting rope is adjusted in this invention.

[0024] Figure 5 is an enlarged view of point A in Figure 2.

[0025] Figure 6 is a three-dimensional structural diagram of the present invention.

[0026] In the diagram: 100, Coal receiving assembly; 101, Coal receiving box; 101a, Coal receiving trough; 101a-1, Columnar section; 101a-2, Conical section; 102, Spring telescopic rod; 102a, Hanging trough; 103, Suspension ring; 104, Connecting rope; 104a, Hanging sleeve; 105, Rope buckle; 200, Suspension assembly; 201, Pull rope; 202, Static pulley; 203, Pulley bracket. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0030] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0031] Example 1

[0032] Referring to Figure 1, a first embodiment of the present invention provides a coal spillage protection device for a coal chute, including a coal receiving assembly 100 and a suspension assembly 200. The coal receiving assembly 100 includes a coal receiving box 101 for receiving coal spillage from the coal chute; the suspension assembly 200 includes a pull rope 201, one end of which is connected to the coal receiving box 101, and the other end of which is connected to the emergency stop switch of a belt conveyor.

[0033] Furthermore, the coal receiving box 101 is located on one side of the belt conveyor directly below the coal chute. The coal receiving box 101 has a top-opening coal collection trough 101a. When coal overflows from the coal chute, a large amount of coal falls from the outlet onto the belt conveyor. The belt conveyor cannot catch all the falling coal, and some coal falls from both sides of the conveyor and into the coal collection trough 101a of the coal receiving box 101. As the number of coal pieces in the collection trough 101a increases, the total weight of the coal receiving box 101 and the coal pieces increases. The impact of the falling coal on the coal receiving box 101 causes it to move downwards. This, in turn, triggers the emergency stop switch of the belt conveyor via the pull rope 201, stopping the conveyor.

[0034] Furthermore, the suspension assembly 200 also includes a stationary pulley 202 and a pulley bracket 203. One end of the pulley bracket 203 is fixedly connected to one side of the outer casing of the belt conveyor, and the stationary pulley 202 is movably mounted on the pulley bracket 203. In use, the pull rope 201 is passed through the stationary pulley 202, and the stationary pulley 202 provides traction to the pull rope 201, thus suspending the coal receiving box 101 in mid-air.

[0035] Specifically, the coal receiving box 101 is a cylindrical box with a regular polygonal or circular bottom surface. Referring to Figure 1, the coal receiving box 101 is selected as a cylindrical box with a square bottom surface.

[0036] Specifically, the coal receiving trough 101a includes a columnar section 101a-1 and a conical section 101a-2. The columnar section 101a-1 is arranged along the axial direction of the coal receiving box 101, and the end away from the conical section 101a-2 is the opening of the coal receiving box 101. Referring to Figure 1, the design of the conical section 101a-2 allows the coal blocks entering the coal receiving trough 101a to quickly converge towards the center, preventing coal blocks from piling up on one side and causing the coal receiving box 101, which is suspended in mid-air, to shake and fail to receive subsequent coal. Consequently, the total weight of the coal receiving box 101 and the coal blocks inside it will never exceed the critical value for pulling the emergency stop switch, preventing the belt conveyor from stopping. Alternatively, it prevents coal blocks from piling up on one side and causing the coal receiving box 101 to tilt, i.e., the top opening of the coal receiving box 101 is tilted, causing the coal blocks to be ejected after entering the coal receiving trough 101a. Consequently, the total weight of the coal receiving box 101 and the coal blocks inside it will never exceed the critical value for pulling the emergency stop switch, preventing the belt conveyor from stopping.

[0037] Specifically, one end of the pull rope 201 connected to the coal receiving box 101 is tied to the center of the bottom of the coal receiving trough 101a.

[0038] Specifically, the pull rope 201 is a flexible steel wire rope.

[0039] Example 2

[0040] Referring to Figures 2 and 6, a second embodiment of the present invention is provided, which provides a coal spillage protection device for a coal chute, including a coal receiving assembly 100 and a suspension assembly 200.

[0041] Furthermore, the coal receiving assembly 100 includes a coal receiving box 101 with a coal receiving trough 101a inside and an opening at the top. The coal receiving box 101 is located on one side of the belt conveyor directly below the coal chute and is used to receive coal overflowing from the coal chute.

[0042] Furthermore, a spring-loaded telescopic rod 102 is provided on the top of the coal receiving box 101. The spring-loaded telescopic rods 102 are evenly distributed along the outer periphery of the coal receiving box 101, and one end of the spring-loaded telescopic rod 102 is hinged to the coal receiving box 101. Specifically, referring to Figures 2 and 6, the coal receiving box 101 is a cylindrical box with a square bottom and an open top. There are four spring-loaded telescopic rods 102, which are respectively provided at the four corners of the top of the coal receiving box 101.

[0043] Furthermore, the coal receiving assembly 100 also includes a suspension ring 103 and a connecting rope 104 attached to the suspension ring 103. The number of connecting ropes 104 is the same as the number of spring telescopic rods 102, and the end of the connecting rope 104 away from the suspension ring 103 is attached to the movable end of the adjacent spring telescopic rod 102.

[0044] Furthermore, the suspension assembly 200 includes a pull rope 201, a stationary pulley 202, and a pulley bracket 203; wherein, one end of the pulley bracket 203 is fixedly connected to one side of the outer casing of the belt conveyor, the stationary pulley 202 is movably mounted on the pulley bracket 203, one end of the pull rope 201 passes through the stationary pulley 202 and is connected to the emergency stop switch of the belt conveyor, and the other end of the pull rope 201 is tied to the suspension ring 103, thereby suspending the coal receiving assembly 100 in mid-air.

[0045] Specifically, in use, the coal receiving box 101 is positioned on one side of the belt conveyor directly below the coal drop pipe, with its opening facing upwards. Through the cooperation of the pull rope 201, the stationary pulley 202, and the pulley bracket 203, the coal receiving box 101 is suspended in mid-air. When coal overflows from the coal drop pipe, it receives the coal chunks that spill from the side of the belt conveyor. As the number of coal chunks in the coal receiving trough 101a increases, the total weight of the coal receiving box 101 and the coal chunks inside increases, thereby triggering the emergency stop switch of the belt conveyor via the pull rope 201, stopping the belt conveyor. Referring to Figures 2 and 6, through the cooperation of the suspension ring 103 and the four sets of connecting ropes 104, the tension between the four sets of connecting ropes 104 and the coal receiving box 101 maintains the suspension balance of the coal receiving box 101, ensuring its stability under certain wind force and vibration conditions. Referring to Figures 2 and 6, the spring telescopic rod 102 is installed to buffer the impact of falling coal blocks on the coal box 101, preventing the connecting rope 104 or the pull rope 201 from breaking due to excessive impact.

[0046] The remaining structure is the same as that in Example 1.

[0047] Example 3

[0048] Referring to Figures 3-5, this is the third embodiment of the present invention. This embodiment differs from the second embodiment in that: a hanging sleeve 104a is provided at the end of the connecting rope 104 away from the suspension ring 103, and a hanging groove 102a is provided at the movable end of the spring telescopic rod 102; the hanging sleeve 104a can be fitted onto the hanging groove 102a of the spring telescopic rod 102 to tighten the connecting rope 104, as shown in Figure 5. Specifically, by utilizing the cooperation between the hanging sleeve 104a and the hanging groove 102a, the coal receiving box 101 can be disassembled more quickly, facilitating the removal of the coal receiving box 101 after the belt conveyor stops operating, thereby making it convenient to empty the coal blocks inside the coal receiving box 101.

[0049] Furthermore, a rope buckle 105 is provided on the connecting rope 104 for adjusting its length. Specifically, referring to Figure 3, by setting the rope buckle 105, the length of the connecting rope 104 can be flexibly adjusted, that is, the tilt angle of the coal receiving box 101 can be adjusted, thereby changing the angle at which the coal blocks enter the coal receiving box 101. At the same time, referring to Figure 4, by setting the rope buckle 105, the relative lengths of the connecting ropes 104 on both sides can be changed, causing the coal receiving box 101 to move laterally, adjusting the position of the coal receiving box 101, and ensuring that the coal blocks can fall into the coal receiving trough 101a of the coal receiving box 101.

[0050] The remaining structure is the same as that in Example 2.

[0051] In summary, this invention provides an additional coal spill protection device while retaining the original mechanical blockage switch. Through the cooperation of the coal receiving component 100 and the suspension component 200, when the amount of coal in the coal drop pipe rises and overflows, the coal receiving component 100 can promptly receive the overflowing coal chunks. Under the action of gravity, the pull rope 201 in the suspension component 200 quickly pulls the emergency stop switch of the belt conveyor, stopping the belt from running. This prevents coal chunks from accumulating and further overflowing. It can serve as a last line of defense to prevent coal spill accidents in the event of failure of the mechanical blockage switch.

[0052] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0053] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0054] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A coal chute coal spill protection device, characterized in that: include, A coal receiving assembly (100) includes a coal receiving box (101), which is located on one side of the belt conveyor directly below the coal drop pipe. The coal receiving box (101) is provided with a coal receiving trough (101a) with a top opening for receiving coal overflow from the coal drop pipe. The suspension assembly (200) includes a pull rope (201), a stationary pulley (202), and a pulley bracket (203); wherein one end of the pulley bracket (203) is fixedly connected to one side of the outer casing of the belt conveyor, the stationary pulley (202) is movably mounted on the pulley bracket (203), one end of the pull rope (201) passes through the stationary pulley (202) and is connected to the emergency stop switch of the belt conveyor, and the other end of the pull rope (201) is connected to the coal receiving assembly (100) for suspending the coal receiving assembly (100) in mid-air.

2. The coal chute coal spill protection device of claim 1, wherein: The coal receiving box (101) is a cylindrical box with a bottom surface that is either polygonal or circular.

3. The coal chute spill protection device of claim 2, wherein: The coal receiving trough (101a) includes a columnar section (101a-1) and a conical section (101a-2). The columnar section (101a-1) is arranged axially along the coal receiving box (101), and the end away from the conical section (101a-2) is the opening of the coal receiving box (101).

4. The coal chute spill protection device of claim 3, wherein: One end of the pull rope (201) is tied to the center of the bottom of the coal receiving trough (101a).

5. The coal chute coal spill protection device of claim 1 or 2, wherein: The coal receiving assembly (100) also includes a spring telescopic rod (102) disposed on the top of the coal receiving box (101). The spring telescopic rod (102) is evenly distributed along the outer periphery of the coal receiving box (101), and one end of the spring telescopic rod (102) is hinged to the coal receiving box (101).

6. The coal chute spill protection device of claim 5, wherein: The coal receiving assembly (100) also includes a suspension ring (103) and a connecting rope (104) attached to the suspension ring (103). The number of connecting ropes (104) is the same as the number of spring telescopic rods (102), and the end of the connecting rope (104) away from the suspension ring (103) is attached to the movable end of the adjacent spring telescopic rod (102).

7. The coal chute spill protection device of claim 6, wherein: The end of the connecting rope (104) away from the suspension ring (103) is provided with a hanging sleeve (104a), and the movable end of the spring telescopic rod (102) is provided with a hanging groove (102a); the hanging sleeve (104a) can be fitted onto the hanging groove (102a) of the spring telescopic rod (102) to tighten the connecting rope (104).

8. A coal chute spill protection device according to claim 6 or 7 wherein: One end of the pull rope (201) is tied to the suspension ring (103).

9. The coal chute spill protection device of claims 1, or 2, or 3, or 4, or 6, or 7, wherein: The pull rope (201) is a flexible steel wire rope.

10. The coal chute spill protection device of claim 6 or 7, wherein: The connecting rope (104) is provided with a rope buckle (105) for adjusting the length of the connecting rope (104).

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