Pulverized coal screening device
By designing a coal powder screening device on the coal feeding pipeline, and using high-pressure air to clear the spherical screen, large coal powder particles are automatically intercepted, solving the problem of coal powder particles causing wear on the conveying pipeline and achieving low-cost transformation and high-efficiency screening.
Patent Information
- Application Number
- CN202520342550.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-02-28
AI Technical Summary
In existing technologies, large coal powder particles cause severe wear to the inner wall of the conveying pipeline, requiring screening of the coal powder particles output by the coal feeder to remove large particles and reduce wear.
Design a coal powder screening device, including an upper pipe, a lower pipe and a screening device connected in series. The device uses a high-pressure air pipe and a spherical screen for screening. The screen is cleared by high-pressure air blowing, and large coal powder particles are automatically intercepted and collected, achieving the goal of eliminating the need for manual cleaning.
It enables low-cost upgrades and renovations of coal feeding pipelines, automatically screening large coal particles, reducing wear, saving time and effort, and keeping the screen unobstructed.
Smart Images
Figure CN223902303U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of coal powder screening devices. BACKGROUND
[0002] From the research background, coal powder particle size has significant influence on the wear of conveying pipe. When the coal powder particle size is larger, its impact force and friction force increase accordingly, thereby causing more serious wear to the inner wall of conveying pipeline. Especially in the interface area and concave-convex points in the furnace.
[0003] Therefore, it is necessary to screen the coal powder particles output by the coal feeder, and remove large coal powder particles to reduce the wear to the inner wall of the conveying pipeline.
[0004] Based on the above problems, we design a coal powder screening device that can be installed on the coal feeding pipeline to screen coal powder particles and intercept large particle coal powder. UTILITY MODEL CONTENTS
[0005] The technical problem to be solved by the utility model is to provide a coal powder screening device that can be installed on the coal feeding pipeline to screen coal powder particles and intercept large particle coal powder.
[0006] To solve the above problems, the utility model adopts the following technical scheme:
[0007] A coal powder screening device includes an upper pipeline and a lower pipeline connected in series to a coal feeding pipeline, and a screening device movably arranged between the upper pipeline and the lower pipeline. The device also includes a high-pressure gas pipe that is inserted into the inside of the screening device and moves with the screening device. A side bracket is welded between the upper pipeline and the lower pipeline.
[0008] Preferably, a coal collecting cover is assembled on the top of the upper pipeline. The diameter of the coal collecting cover gradually decreases downward, and the bottom is perforated.
[0009] Preferably, the screening device includes a movable pipe and a spherical screen. The upper part of the movable pipe is processed with a necking part, the diameter of the necking part gradually decreases upward, the spherical screen is fixed to the top of the necking part, the movable pipe is partially inserted into the upper pipeline, and the coal collecting cover corresponds to the spherical screen. A small pipe portion is integrally formed at the lower end of the movable pipe, and the small pipe portion is inserted into the lower pipeline. A storage tank for collecting large particle coal powder is welded to the outside of the movable pipe. An exhaust pipe is welded to the outer wall of the storage tank. A servo push rod is installed between the movable pipe and the lower pipeline. The high-pressure gas pipe is inserted from the outer wall of the movable pipe and extends upward to the inside of the spherical screen. The upper end of the high-pressure gas pipe is closed, and the high-pressure gas pipe is uniformly distributed with air blowing holes near the upper end.
[0010] Preferably, the storage tank has an inclined bottom surface, and the discharge pipe is located at the low position of the bottom surface.
[0011] Preferably, a tank cover is arranged at the top of the storage tank, and a sealing ring is arranged at the inner wall of the tank cover and contacts the upper pipeline to form a seal.
[0012] Preferably, a conical guide cover is welded to the outer wall of the movable pipe, and the bottom of the guide cover is connected to the bottom surface of the tank.
[0013] Preferably, a first sealing ring is arranged at the inner wall of the lower pipeline and cooperates with the small pipe portion to form a seal.
[0014] The beneficial effects of the present application are as follows:
[0015] Advantage one, the device is connected in series to the coal feeding pipeline, so that the existing coal feeding pipeline can be directly upgraded and modified after being cut, and the modification cost is low.
[0016] Advantage two, the device screens the coal powder particles through the spherical screen, and the large coal powder particles are removed, and the intercepted coarse particle coal powder can be guided out through the downward movement of the screening device, without manual cleaning, and the use is more convenient, time-saving and labor-saving.
[0017] Advantage three, the spherical screen can be blown and dredged by high-pressure air blowing, and the spherical screen is kept unobstructed. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0019] Figure 1 is a structural schematic view of the present application;
[0020] Figure 2 is a sectional view of the device;
[0021] Figure 3 is a downward schematic view of the spherical screen. DETAILED DESCRIPTION
[0022] All features disclosed in this specification, or the steps in all methods or processes disclosed, can be combined in any manner, except for mutually exclusive features and / or steps.
[0023] Any feature in the foregoing description is effective as a separate disclosure irrespective of whether it is explicitly stated as an aspect of the application. In particular, the disclosure of any aspect of the application in the foregoing description should be taken as an explicit disclosure of that aspect.
[0024] In the description of the present application, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "central", "end", "length", "outer end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0025] In addition, in the description of the present application, "a plurality of" means at least two, for example, two, three, etc., unless otherwise specifically limited.
[0026] In the present application, unless otherwise specifically defined and limited, the terms "set", "sleeve", "connect", "penetrate", "plug" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0027] Referring to Figure 1 , Figure 2 and Figure 3 A coal powder screening device is shown, which comprises an upper pipeline 1 and a lower pipeline 2 connected in series to a coal feeding pipeline, and a screening device 3 movably arranged between the upper pipeline 1 and the lower pipeline 2, further comprising a high-pressure gas pipe 4, the high-pressure gas pipe 4 is inserted into the inside of the screening device 3 and moves with the screening device 3; a side support 6 is welded between the upper pipeline 1 and the lower pipeline 2.
[0028] In the above technical solution, the upper pipeline 1 and the lower pipeline 2 are connected with the traditional coal feeding pipeline, so that when the coal feeding machine transports the coal powder along the coal feeding pipeline, the coal powder naturally passes through the device.
[0029] The screening device 3 screens the coal powder particles and separates the large coal blocks therefrom.
[0030] The large coal blocks intercepted by the screening device 3 are separated and blown by the high-pressure gas pipe 4.
[0031] High-pressure air pipe 4 is connected to high-pressure airflow equipment, such as an air pump, via a high-pressure hose.
[0032] See Figure 1 and Figure 2 As shown, a coal-gathering hood 5 is installed at the top of the upper pipe 1. The diameter of the coal-gathering hood 5 gradually decreases downward and the bottom is penetrating.
[0033] The coal-gathering hood 5 is designed to concentrate the coal powder and supply it from the middle of the screening device 3.
[0034] See Figure 1 and Figure 2 As shown, the screening device 3 includes a movable tube 31 and a spherical screen 32. The upper part of the movable tube 31 has a tapered section 33, the diameter of which gradually decreases upwards. The spherical screen 32 is fixed to the top of the tapered section 33. The movable tube 31 is partially inserted into the upper pipe 1, and the coal hood 5 corresponds to the spherical screen 32. A small tube portion 34 is integrally formed at the lower end of the movable tube 31, and this small tube portion 34 is inserted into the lower pipe 2. A retaining device is welded to the outside of the movable tube 31. A storage tank 35 for collecting large pulverized coal particles is provided, and a discharge pipe 36 is welded to the outer wall of the storage tank 35. A servo push rod 37 is installed between the movable pipe 31 and the lower pipe 2. The high-pressure air pipe 4 is inserted from the outer wall of the movable pipe 31 and extends upward to the inner side of the spherical screen 32. The upper end of the high-pressure air pipe 4 is closed. Air blowing holes 41 are evenly distributed near the upper end of the high-pressure air pipe 4. The air blowing holes 41 are oblique holes that slope downward toward the outer wall of the high-pressure air pipe 4 to prevent pulverized coal particles from entering.
[0035] In the above technical solution, spherical screen 32 intercepts coal powder particles. Fine coal powder particles pass through spherical screen 32 and are discharged downward into the coal feeding pipe, while coarse particles are intercepted and roll down along spherical screen 32.
[0036] When coal feeding stops, the spherical screen 32 moves downward and disengages from the upper pipe 1 by retracting the servo push rod 37. The intercepted coarse particles roll into the storage tank 35 and are discharged through the discharge pipe 36.
[0037] In order to prevent the coal powder from blocking, the spherical screen 32 can be driven by the servo push rod 37 to move up and down in a small range intermittently during the coal feeding process. When moving downward, the closing part 33 is partially displaced to the outside of the upper pipeline 1, so that a gap is formed between the closing part 33 and the upper pipeline 1, for discharging the coarse coal powder that falls down, and then the servo push rod 37 drives the spherical screen 32 to reset, so as to avoid the leakage of fine coal powder. The intermittent time of this small range movement is once every 2 minutes, and the downward staying time of the closing part 33 is 2 seconds each time.
[0038] When the coal feeding is stopped, the spherical screen 32 moves downward to be separated from the upper pipeline 1, and is blown by the high-pressure gas pipe 4, so as to realize the dredging of the spherical screen 32.
[0039] Referring to Figure 2 The storage tank 35 has an inclined tank bottom surface 351, and the discharge pipe 36 is located at the low position of the tank bottom surface 351.
[0040] The tank bottom surface 351 is designed to guide the coarse coal powder.
[0041] Referring to Figure 2 A tank cover 352 is arranged at the top of the storage tank 35, a sealing ring 353 is clamped on the inner wall of the tank cover 352, and the sealing ring 353 forms a seal with the upper pipeline 1 after being in contact with the upper pipeline 1.
[0042] This technical solution can keep the upper end of the storage tank 35 in a sealed state at all times, so as to avoid dust raising during high-pressure blowing.
[0043] Preferably, a conical guide cover 331 is welded on the outer wall of the movable pipe 31, and the bottom of the guide cover 331 is connected with the tank bottom surface 351.
[0044] Referring to Figure 2 A first sealing ring 221 is clamped on the inner wall of the lower pipeline 2, and the first sealing ring 221 cooperates with the small pipe part 34 to form a seal.
[0045] This technical solution is to avoid dust overflow.
[0046] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.
[0047] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0048] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0049] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0050] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0051] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A coal fines sizing device characterized by: The utility model provides a coal gathering device, which comprises an upper pipeline (1) and a lower pipeline (2) connected in series with a coal feeding pipeline, a screening device (3) movably arranged between the upper pipeline (1) and the lower pipeline (2), and a high-pressure air pipe (4) penetrating the inside of the screening device (3) and moving with the screening device (3); a side support (6) is welded between the upper pipeline (1) and the lower pipeline (2).
2. The coal fines sizing device of claim 1, wherein: An upper end of the upper pipeline (1) is provided with a coal gathering cover (5) with a diameter gradually decreasing downwards and a bottom penetrating through.
3. The coal fines sizing device of claim 2, wherein: The screening device (3) comprises a movable pipe (31) and a spherical screen (32); the upper part of the movable pipe (31) is provided with a necking part (33) with a diameter gradually decreasing upwards; the spherical screen (32) is fixed to the top of the necking part (33); the movable pipe (31) is partially inserted into the upper pipeline (1); the coal gathering cover (5) corresponds to the spherical screen (32); the lower end of the movable pipe (31) is integrally formed with a small pipe part (34) inserted into the lower pipeline (2); a storage tank (35) for collecting large coal powder is welded to the outside of the movable pipe (31); a discharge pipe (36) is welded to the outer wall of the storage tank (35); a servo push rod (37) is arranged between the movable pipe (31) and the lower pipeline (2); the high-pressure air pipe (4) is inserted from the outer wall of the movable pipe (31) and extends upwards to the inside of the spherical screen (32); the upper end of the high-pressure air pipe (4) is closed; the high-pressure air pipe (4) is uniformly provided with air blowing holes (41) near the upper end.
4. The coal fines sizing device of claim 3, wherein: The storage tank (35) has an inclined tank bottom surface (351); the discharge pipe (36) is located at the low position of the tank bottom surface (351).
5. The coal fines sizing device of claim 4, wherein: A tank cover (352) is arranged at the top of the storage tank (35); a sealing ring (353) is clamped to the inner wall of the tank cover (352); the sealing ring (353) is in contact with the upper pipeline (1) to form a seal.
6. The coal fines sizing device of claim 4, wherein: A conical guide cover (331) is welded to the outer wall of the movable pipe (31); the bottom of the guide cover (331) is connected with the tank bottom surface (351).
7. The coal fines sizing device of claim 3, wherein: A first sealing ring (221) is clamped to the inner wall of the lower pipeline (2); the first sealing ring (221) cooperates with the small pipe part (34) to form a seal.