Anti-blocking coal mill discharging structure

Abstract

The invention discloses an anti-blocking coal mill discharging structure which comprises a mounting plate and an anti-sticking type discharging assembly, the anti-sticking type discharging assembly comprises an outlet shell, a motor and a discharging roller, the outlet shell is fixedly connected with the mounting plate, the motor is detachably connected with the outlet shell and located in the center of the upper portion of the outlet shell, and the discharging roller is arranged on the mounting plate. The discharging roller penetrates through the outlet shell to be detachably connected with the motor, the discharging roller is arranged in the outlet shell, and the structure can solve the problems that a discharging structure of a coal mill is prone to being blocked, the coal milling efficiency and the equipment stability are affected, and a traditional structure lacks effective anti-blocking measures.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of coal mills, and relates to a coal mill discharge structure capable of preventing blockage. BACKGROUND

[0002] As a key auxiliary equipment of a coal-fired boiler, a coal mill is responsible for the important task of crushing and grinding coal lumps into coal powder. In the coal grinding process, the discharge link is crucial. However, the current coal mill discharge structure generally has some problems, which seriously affect the working efficiency and stability of the coal mill.

[0003] Publication No. CN117380348A discloses a coal mill feed inlet anti-blocking device, which comprises a coal mill, a motor, a cylinder arranged outside the motor, a shaft coupling arranged on the outer wall of the motor spindle, an extension shaft arranged in the shaft coupling, and a feed inlet arranged outside the cylinder; an anti-blocking assembly comprising a clamping block arranged on the outer wall of the feed inlet, a filter disc movably arranged in the feed inlet, and a filter hole opened in the end face of the filter disc; and a transmission assembly comprising a driven disc arranged below the feed inlet, a driving disc arranged below the driven disc, and a driving rod movably arranged on the end face of the driving disc and movably connected to the outer wall of the driving rod. As a preferred scheme of the coal mill feed inlet anti-blocking device, a sealing block is arranged in the feed inlet, a first sealing strip and a second sealing strip are arranged on the end face of the sealing block, a clamping groove is opened on the end face of the sealing block, and the clamping groove is located between the first sealing strip and the second sealing strip. The largest coal lump that can be ground by the coal mill cylinder is selected through the filter hole on the filter disc. When blockage occurs in the feed inlet, the power of the coal mill spindle is connected to the anti-blocking assembly, the coal lump in the feed inlet is crushed by the clamping block, so that it can pass through the filter hole, and blockage of the coal mill feed inlet is prevented.

[0004] In actual production, due to the influence of factors such as the moisture, viscosity, and particle size of coal, blockage often occurs when the coal mill discharges. Once the discharge port is blocked, not only will the internal pressure of the coal mill increase, affecting the grinding efficiency, but also equipment failure may occur, increasing maintenance costs and downtime. The traditional discharge structure often does not fully consider these factors in design, and lacks effective anti-blocking measures. For example, the pipe diameter of some discharge pipelines is small, which is easy to be blocked by large coal lumps or coal lumps with high viscosity. Some discharge structures do not have cleaning or dredging devices, and when blockage occurs, manual cleaning is required, which is tedious and inefficient.

[0005] Therefore, it is of great practical significance to develop a coal mill discharge structure capable of effectively preventing blockage, which has a positive effect on improving the working performance of the coal mill, reducing production costs, and ensuring the continuity of production. SUMMARY

[0006] The present application aims to overcome the above-mentioned prior art defects, and provides an anti-blocking coal mill discharge structure, which can solve the problems of easy blocking of the coal mill discharge structure, affecting the grinding efficiency and equipment stability, and lack of effective anti-blocking measures in the traditional structure.

[0007] To achieve the above-mentioned purpose, the present application discloses an anti-blocking coal mill discharge structure, which comprises a mounting plate and an anti-sticking discharge assembly, the anti-sticking discharge assembly comprises an outlet shell, a motor and a discharge roller, the outlet shell is fixedly connected with the mounting plate, the motor is detachably connected with the outlet shell and located at the upper center of the outlet shell, the discharge roller is detachably connected with the motor through the outlet shell and is arranged inside the outlet shell.

[0008] The anti-blocking coal mill discharge structure further improves in that:

[0009] Further, the anti-sticking discharge assembly further comprises a rotating shaft and a conveyor belt, one end of the conveyor belt is slidably connected with the rotating shaft.

[0010] Further, the anti-sticking discharge assembly further comprises anti-sticking convex particles, the anti-sticking convex particles are fixedly connected with the conveyor belt and located on the outer surface of the conveyor belt.

[0011] Further, the anti-sticking discharge assembly further comprises a jacking frame, a center frame and a jacking column, the jacking column is slidably connected with one end of the conveyor belt away from the rotating shaft and located inside and below the conveyor belt, the center frame is arranged inside and at the center of the conveyor belt, and the jacking column is below the center frame.

[0012] Further, the jacking column and the jacking frame are on the same horizontal line.

[0013] Further, the anti-sticking discharge assembly further comprises a rotating machine and a transmission belt, the rotating machine is detachably connected with the center frame and located inside the center frame, one end of the rotating machine passes through the center frame and is arranged on one side of the center frame, and the transmission belt is sleeved on the output end of the rotating machine and the outer surface of the rotating shaft, respectively.

[0014] Further, a plurality of mounting holes are formed in the mounting plate.

[0015] Further, each mounting hole is arranged at the position of the four corners of the mounting plate.

[0016] Further, the jacking frame is of a telescopic structure.

[0017] Further, the motor is located at the upper center of the outlet shell.

[0018] The present application has the following beneficial effects:

[0019] The anti-blocking coal mill discharge structure of the present application, when in operation, adds an anti-sticking discharge assembly, which actively and effectively solves the problems of easy blocking of the coal mill discharge structure, affecting the coal grinding efficiency and equipment stability, and lack of effective anti-blocking measures in the traditional structure, while retaining the original beneficial effects. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and serve as an explanation of the illustrative embodiments of the present application and its description, and do not constitute improper limitations on the present application. In the drawings:

[0021] Figure 1 It is a structural schematic diagram of the whole application.

[0022] Figure 2 It is a side view of the whole application.

[0023] Figure 3 It is a front view of the whole application.

[0024] Figure 4 It is an A-A line structural sectional view of the present application. Figure 3

[0025] Among them, 101 is a mounting plate, 102 is a mounting hole, 103 is an outlet shell, 104 is a motor, 105 is a discharge roller, 106 is a rotating shaft, 107 is a conveyor belt, 108 is an anti-sticking convex particle, 109 is a jacking frame, 110 is a center frame, 111 is a rotating machine, 112 is a transmission belt, and 113 is a jacking column. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] In the description of the present application, it should be understood that the terms "include" and "contain" indicate the existence of described features, whole, steps, operations, elements and / or components, but do not exclude the existence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof.

[0028] ​It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0029] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this invention generally indicates that the preceding and following objects have an "or" relationship.

[0030] It should be understood that although terms such as first, second, third, etc., may be used in the embodiments of the present invention to describe the preset range, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from one another. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0031] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0034] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4The anti-clogging coal mill discharge structure of the present invention includes a mounting plate 101 and an anti-sticking discharge assembly. The anti-sticking discharge assembly includes a mounting hole 102, an outlet shell 103, a motor 104, a discharge roller 105, a rotating shaft 106, a conveyor belt 107, anti-sticking protrusions 108, a lifting frame 109, a center frame 110, a lifting column 113, a rotating machine 111, and a transmission belt 112. This solution solves the problem that current coal mill discharge structures are prone to clogging, affecting grinding efficiency and equipment stability, and that traditional structures lack effective anti-clogging measures. It is understood that, in use, the mounting plate 101 serves as a basic load-bearing structure, with the mounting hole 102 vertically penetrating its interior. The mounting hole 102 and... The discharge end of the coal mill is the primary channel for pulverized coal to enter the discharge structure. The outlet shell 103 is fixedly connected to the center of one side of the mounting plate 101. The outlet shell 103 has a hollow cavity structure, and its inlet end communicates with the mounting hole 102, forming the main channel for pulverized coal conveying. The anti-clogging mechanism of the outlet shell 103 lies in its internal power conveying mechanism: the motor 104 is detachably connected to the center of the upper part of the outlet shell 103 via bolts. The output end of the motor 104 extends vertically downwards into the interior of the outlet shell 103 and is detachably connected to the discharge roller 105 via a coupling. When the motor 104 starts, the discharge roller 105 rotates at a high speed of 300-500 revolutions per minute. The spiral blades on the surface can forcefully push the falling coal powder, preventing it from accumulating and clogging on the upper part of the outlet shell 103. To cooperate with the discharge roller 105 for subsequent conveying, a horizontally arranged rotating shaft 106 is provided at the lower part of the outlet shell 103. The two ends of the rotating shaft 106 are rotatably connected to the inner wall of the outlet shell 103 through bearings, and its axis is perpendicular to the discharge roller 105 at a 90-degree angle. The outer surface of the rotating shaft 106 is fitted with a conveyor belt 107. The conveyor belt 107 is made of food-grade silicone, which has good wear resistance and non-stick properties. It is worth noting that the outer surface of the conveyor belt 107 is uniformly distributed with anti-sticking protrusions 108. These protrusions are hemispherical in design, which can increase the adhesion between the conveyor belt and the coal powder. The contact friction of the powder can reduce the probability of adhesion by decreasing the contact area, thus greatly reducing the adhesion rate. For the stable operation of the conveyor belt 107, this structure is designed with multiple support mechanisms: a central frame 110 is provided between the rotating shaft 106 and the end of the conveyor belt 107. This central frame 110 is welded to the inner wall of the outlet shell 103, and its top is in contact with the inner surface of the conveyor belt 107, forming a rigid support for the middle of the conveyor belt, effectively preventing sagging deformation caused by the weight of the material. A lifting column 113 is provided below the end of the conveyor belt 107 away from the rotating shaft 106. This lifting column 113 and the lifting frame 109 below the central frame 110 are on the same horizontal line.Both can be adjusted synchronously in height via adjusting bolts, thereby controlling the tension of the conveyor belt 107 and ensuring its smooth operation. The drive system of the conveyor belt 107 consists of the rotating machine 111 and the transmission belt 112: the rotating machine 111 is fixed inside the center frame 110 by bolts, and its output shaft extends horizontally to one side of the center frame 110. Both the end of the output shaft and the end of the rotating shaft 106 are fitted with pulleys. The transmission belt 112 is fitted between the two pulleys to form a transmission connection. When the rotating machine 111 starts, the transmission belt 112 drives the rotating shaft 106 at a speed of 60-10 km / h. The conveyor belt 107 rotates at 0 rpm, driving it to achieve horizontal conveying. The coal powder pushed by the discharge roller 105 is smoothly transported to the end of the outlet shell 103 for discharge. In actual operation, after the coal powder enters the outlet shell 103 through the mounting hole 102, it is first dispersed by the high-speed rotating discharge roller 105 and pushed onto the conveyor belt 107 below. The anti-sticking protrusions 108 effectively prevent coal powder from adhering. Simultaneously, the conveyor belt 107 continuously rotates under the drive of the rotating machine 111, and with the stable support of the central frame 110, the coal powder remains in a flowing state, completely solving the clogging problem of traditional discharge structures.

[0035] In this specific embodiment, the mounting hole 102 is fixedly connected to the mounting plate 101 and located inside the mounting plate 101, and the mounting hole 102 is perpendicular to the mounting plate 101. The outlet shell 103 is fixedly connected to the mounting plate 101 and located at the center of one side of the mounting plate 101, and the outlet shell 103 is located on one side of the mounting hole 102. The motor 104 is detachably connected to the outlet shell 103 and located at the upper center of the outlet shell 103. The discharge roller 105 passes through the outlet shell 103 and is detachably connected to the motor 104, and is located at the lower output end of the motor 104. The discharge roller 105 is located inside the outlet shell 103 and is also perpendicular to the outlet shell 103.

[0036] The rotating shaft 106 is rotatably connected to the outlet shell 103 and is located inside the lower part of the outlet shell 103. The rotating shaft 106 is perpendicular to the discharge roller 105. One end of the conveyor belt 107 is slidably connected to the rotating shaft 106 and is located on the outer surface of the rotating shaft 106.

[0037] Secondly, the anti-sticking protrusions 108 are fixedly connected to the conveyor belt 107 and are located on the outer surface of the conveyor belt 107.

[0038] Meanwhile, the lifting column 113 is slidably connected to one end of the conveyor belt 107 away from the rotating shaft 106 and is located inside the lower part of the conveyor belt 107. The central frame 110 is located inside the center of the conveyor belt 107. The lifting column 113 is below the central frame 110, and the lifting column 113 and the lifting frame 109 are on the same horizontal line.

[0039] The rotating machine 111 is detachably connected to the central frame 110 and is located inside the central frame 110. One end of the rotating machine 111 passes through the central frame 110 and is disposed on one side of the central frame 110. The transmission belt 112 is disposed at the output end of the rotating machine 111 and on the outer surface of the rotating shaft 106.

[0040] In using this invention, the mounting plate 101 serves as the basic load-bearing structure, with the mounting hole 102 vertically penetrating its interior. This mounting hole 102 connects to the discharge end of the coal mill, serving as the primary channel for pulverized coal to enter the discharge structure. The outlet shell 103 is fixedly connected to the center of one side of the mounting plate 101. The outlet shell 103 has a hollow cavity structure, with its inlet end communicating with the mounting hole 102, forming the main channel for pulverized coal conveying. The anti-clogging mechanism of the outlet shell 103 lies in its internal power conveying mechanism: a motor 104 is detachably connected to the center of the upper part of the outlet shell 103 via bolts. The output end of the motor 104 extends vertically downwards into the interior of the outlet shell 103 and is connected to the mill via a coupling. The discharge roller 105 is detachably connected. When the motor 104 starts, the discharge roller 105 rotates at a high speed of 300-500 revolutions per minute. The spiral blades on its surface can forcefully push the falling coal powder, preventing the coal powder from accumulating and clogging on the upper part of the outlet shell 103. To cooperate with the discharge roller 105 to complete subsequent conveying, a horizontally arranged rotating shaft 106 is provided inside the lower part of the outlet shell 103. The two ends of the rotating shaft 106 are rotatably connected to the inner wall of the outlet shell 103 through bearings, and its axis is perpendicular to the discharge roller 105 at a 90-degree angle. The outer surface of the rotating shaft 106 is fitted with a conveyor belt 107. The conveyor belt 107 is made of food-grade silicone material and has good performance. Regarding wear resistance and anti-sticking properties, it is worth noting that the outer surface of the conveyor belt 107 is uniformly distributed with anti-sticking protrusions 108. These protrusions adopt a hemispherical design, which can increase the contact friction with coal powder and reduce the probability of adhesion by reducing the contact area, thus greatly reducing the material adhesion rate. For the stable operation of the conveyor belt 107, this structure is designed with multiple support mechanisms: a central frame 110 is set between the rotating shaft 106 and the end of the conveyor belt 107. The central frame 110 is fixed to the inner wall of the outlet shell 103 by welding, and its top is in contact with the inner surface of the conveyor belt 107, forming a rigid support for the middle of the conveyor belt, effectively avoiding the sagging deformation of the conveyor belt caused by the weight of the material. A lifting column 113 is located below the end furthest from the rotating shaft 106. This lifting column 113 is level with the lifting frame 109 below the central frame 110. Both can be adjusted synchronously using adjusting bolts to control the tension of the conveyor belt 107 and ensure smooth operation. The drive system of the conveyor belt 107 consists of a rotating machine 111 and a transmission belt 112. The rotating machine 111 is bolted to the inside of the central frame 110, and its output shaft extends horizontally to one side of the central frame 110. Pulleys are fitted onto both the end of the output shaft and the end of the rotating shaft 106. The transmission belt 112 is fitted between the two pulleys to form a transmission connection. When the rotating machine 111 starts...The drive belt 112 drives the rotating shaft 106 to rotate at a speed of 60-100 revolutions per minute, thereby driving the conveyor belt 107 to achieve horizontal conveying. The coal powder pushed by the discharge roller 105 is smoothly transported to the end of the outlet shell 103 for discharge. In actual operation, after the coal powder enters the outlet shell 103 through the mounting hole 102, it is first dispersed by the high-speed rotating discharge roller 105 and pushed onto the conveyor belt 107 below. The anti-sticking protrusions 108 effectively prevent coal powder from adhering. Simultaneously, the conveyor belt 107 continuously rotates under the drive of the rotating machine 111, and with the stable support of the central frame 110, the coal powder remains in a flowing state, completely solving the clogging problem of traditional discharge structures.

[0041] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0042] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0043] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A coal mill discharge structure for preventing clogging, characterized in that, The device includes a mounting plate and an anti-stick discharge assembly. The anti-stick discharge assembly includes an outlet shell, a motor, and a discharge roller. The outlet shell is fixedly connected to the mounting plate. The motor is detachably connected to the outlet shell and is located at the upper center of the outlet shell. The discharge roller passes through the outlet shell and is detachably connected to the motor. The discharge roller is disposed inside the outlet shell.

2. The anti-clogging coal mill discharge structure according to claim 1, characterized in that, The anti-stick discharge assembly also includes a rotating shaft and a conveyor belt. The rotating shaft is rotatably connected to the outlet shell, and one end of the conveyor belt is slidably connected to the rotating shaft.

3. The anti-clogging coal mill discharge structure according to claim 2, characterized in that, The anti-stick discharge assembly also includes anti-stick protrusions, which are fixedly connected to the conveyor belt and located on the outer surface of the conveyor belt.

4. The anti-clogging coal mill discharge structure according to claim 3, characterized in that, The anti-stick discharge assembly also includes a lifting frame, a central frame, and a lifting column. The lifting column is slidably connected to the end of the conveyor belt away from the rotating shaft and is located inside and below the conveyor belt. The central frame is located inside and at the center of the conveyor belt, and the lifting column is located below the central frame.

5. The anti-clogging coal mill discharge structure according to claim 4, characterized in that, The lifting column and the lifting frame are on the same horizontal line.

6. The anti-clogging coal mill discharge structure according to claim 4, characterized in that, The anti-stick discharge assembly also includes a rotating machine and a transmission belt. The rotating machine is detachably connected to the central frame and is located inside the central frame. One end of the rotating machine passes through the central frame and is disposed on one side of the central frame. The transmission belt is respectively sleeved on the output end of the rotating machine and the outer surface of the rotating shaft.

7. The anti-clogging coal mill discharge structure according to claim 1, characterized in that, The mounting plate has several mounting holes.

8. The anti-clogging coal mill discharge structure according to claim 1, characterized in that, Each mounting hole is located at one of the four corners of the mounting plate.

9. The anti-clogging coal mill discharge structure according to claim 1, characterized in that, The lifting frame is a telescopic structure.

10. The anti-clogging coal mill discharge structure according to claim 1, characterized in that, The motor is located at the center above the outlet housing.

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