Pulverized coal and air mixing device

Abstract

The utility model relates to a pulverized coal and air mixing device, which is applied to the technical field of pulverized coal conveying and mixing, solves the problems that the existing pulverized coal conveying is easy to be interrupted and discontinuous, and the conveying efficiency is reduced, and comprises a mixing barrel, the coal feeding assembly comprises a first pulverized coal pipeline and a second pulverized coal pipeline which are arranged at the feeding end of the mixing barrel, the discharging switching assembly comprises a blocking plate blocking the discharging end of the first pulverized coal pipeline and a driving part driving the blocking plate to move, and the length of the blocking plate is equal to the distance between the axis of the first pulverized coal pipeline and the axis of the second pulverized coal pipeline. A driving piece drives a blocking plate to move from the discharging end of the first pulverized coal pipeline to the discharging end of the second pulverized coal pipeline so that switching of opening and closing of the discharging end of the first pulverized coal pipeline and the discharging end of the second pulverized coal pipeline can be achieved. The air supply assembly is used for charging air into the mixing barrel; the pulverized coal conveying device has the effects that pulverized coal can be continuously conveyed into the mixing barrel, the phenomenon of discontinuous pulverized coal conveying is avoided, and the pulverized coal conveying efficiency is improved.

Description

Technical Field

[0001] The utility model is applied in the technical field of coal powder conveying and mixing, and particularly relates to a coal powder air mixing device. Background Art

[0002] In the existing process of conveying and mixing coal powder, the coal powder in at least two coal powder bins is usually conveyed to the mixing device in sequence. However, the following problems may occur during the conveying process: the discharge pipe of each coal powder bin is connected to the feed end of the mixing bin, and a switch control valve is provided on the discharge pipe in each coal powder bin. When conveying coal powder from one of the coal powder bins to the mixing bin, the switch control valve of the other coal powder bin needs to be closed. After the conveying of one of the coal powder bins is completed, the other is opened for conveying. This causes certain problems, namely, it takes a certain amount of time for the coal powder to be conveyed in the discharge pipe. Therefore, the coal powder conveying in the mixing device will be interrupted, thereby reducing the conveying efficiency. Utility Model Content

[0003] The utility model aims to provide a coal powder air mixing device, which solves the problem that the existing coal powder conveying is prone to interruption, discontinuous conveying and reduced conveying efficiency.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The utility model provides a coal powder air mixing device, comprising:

[0006] Mixing cartridge;

[0007] A coal feeding assembly, the coal feeding assembly comprising a first pulverized coal pipeline and a second pulverized coal pipeline arranged at the feeding end of the mixing cylinder, wherein the discharge ends of the first pulverized coal pipeline and the second pulverized coal pipeline extend into the interior of the mixing cylinder;

[0008] A discharge switching assembly, the discharge switching assembly comprising a blocking plate blocking the discharge end of the first coal powder pipeline or the discharge end of the second coal powder pipeline and a driving member driving the blocking plate to move, the length of the blocking plate being equal to the spacing between the axes of the first coal powder pipeline and the second coal powder pipeline, and the blocking plate being driven by the driving member to move from the discharge end of the first coal powder pipeline to the discharge end of the second coal powder pipeline or from the discharge end of the second coal powder pipeline to the discharge end of the first coal powder pipeline to realize the switching of the discharge ends of the first coal powder pipeline and the second coal powder pipeline to open and close;

[0009] An air supply component is used to fill air into the mixing cylinder.

[0010] Furthermore, the sealing plate is arranged in the form of a convex arc-shaped plate, and the outer edge surface of the sealing plate seals the discharge port of the coal powder pipeline one or the discharge port of the coal powder pipeline two. The discharge ends of the coal powder pipeline one and the coal powder pipeline two are arranged in an inverted eight shape in the mixing barrel, and the shapes of the discharge ports of the coal powder pipeline one and the coal powder pipeline two are adapted to the outer edge surface of the sealing plate.

[0011] Furthermore, the driving member includes a rotating rod connected to the inner edge surface of the sealing plate and a driving motor that drives the sealing plate to rotate. The driving motor is arranged outside the mixing cylinder and its driving shaft rotates through the mixing cylinder and is connected to the other end of the rotating rod.

[0012] Furthermore, the air-supply component includes an outer shell and an air-supply pipe which are sleeved on the mixing cylinder. There is a gap between the inner wall of the outer shell and the outer edge surface of the mixing cylinder to form an air-supply cavity. The air outlet end of the air-supply pipe is arranged in the air-supply cavity. A plurality of inflation holes which are connected to the interior are evenly arranged on the outer edge surface of the mixing cylinder.

[0013] Furthermore, a discharge pipe is provided at the discharge end of the mixing cylinder, and a main control valve is provided on the discharge pipe.

[0014] Furthermore, a sealing layer is provided on the outer edge surface of the blocking plate which is in contact with the first pulverized coal pipeline and the second pulverized coal pipeline.

[0015] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0016] When the pulverized coal-air mixing device of the utility model is working, a driving member drives a blocking plate to move from the discharge end of pulverized coal pipeline one to the discharge end of pulverized coal pipeline two or from the discharge end of pulverized coal pipeline two to the discharge end of pulverized coal pipeline one to realize the switching of the opening and closing of the discharge ends of pulverized coal pipeline one and pulverized coal pipeline two, wherein the length of the blocking plate is set to be equal to the spacing between the axes of pulverized coal pipeline one and pulverized coal pipeline two, when the opening and closing of the discharge ends of pulverized coal pipeline one and pulverized coal pipeline two are switched, when the discharge end of pulverized coal pipeline one is partially closed, the discharge end of pulverized coal pipeline two is partially opened, and the discharge flow rate can still be kept unchanged, and when the discharge end of pulverized coal pipeline one is completely closed, the pulverized coal pipeline two is completely opened, so that the pulverized coal can be continuously conveyed into the mixing drum without the phenomenon of interruption in the coal powder conveying, thereby improving the coal powder conveying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0018] Figure 1 It is a structural schematic diagram of a preferred embodiment of the utility model in which the discharge end of the first pulverized coal pipeline is closed and the second pulverized coal pipeline is open;

[0019] Figure 2 It is a structural schematic diagram of a preferred embodiment of the utility model in which the plugging plate is moved from the pulverized coal pipeline 1 to the pulverized coal pipeline 2;

[0020] Figure 3 It is a structural schematic diagram of a preferred embodiment of the utility model in which the discharge end of the pulverized coal pipeline 1 is open and the pulverized coal pipeline 2 is closed;

[0021] Figure 4 It is a structural schematic diagram of the connection relationship between the driving member and the blocking plate in the preferred embodiment of the utility model.

[0022] The reference numerals are described as follows:

[0023] 1. Mixing cylinder; 2. Discharge pipe; 3. Main control valve;

[0024] 4. Coal inlet assembly; 5. Pulverized coal pipeline 1; 6. Pulverized coal pipeline 2;

[0025] 7. Discharging switching assembly; 71. Blocking plate; 72. Driving member; 721. Rotating rod; 722. Driving motor;

[0026] 8. Air supply assembly; 81. Shell; 82. Air supply pipeline;

[0027] 9. Air filling cavity; 10. Inflation hole; 11. Sealing layer. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] refer to Figure 1-Figure 3 , a coal powder air mixing device provided by the utility model comprises:

[0032] A mixing drum 1, in which pulverized coal and air are mixed, a discharge pipe 2 is provided at the discharge end of the mixing drum 1, and a main control valve 3 is provided on the discharge pipe 2;

[0033] The coal inlet assembly 4 includes a pulverized coal pipeline 1 5 and a pulverized coal pipeline 2 6 arranged at the feeding end of the mixing drum 1, and the discharge ends of the pulverized coal pipeline 1 5 and the pulverized coal pipeline 2 6 extend into the interior of the mixing drum 1; the pulverized coal pipeline 1 5 and the pulverized coal pipeline 2 6 are used to transport the pulverized coal into the mixing drum 1;

[0034] The discharge switching component 7 includes a blocking plate 71 blocked at the discharge end of the coal powder pipeline 15 or the discharge end of the coal powder pipeline 26 and a driving member 72 for driving the blocking plate 71 to move. The length of the blocking plate 71 is equal to the spacing between the axes of the coal powder pipeline 15 and the coal powder pipeline 26. The driving member 72 drives the blocking plate 71 to move from the discharge end of the coal powder pipeline 15 to the discharge end of the coal powder pipeline 26 or from the discharge end of the coal powder pipeline 26 to the discharge end of the coal powder pipeline 15 to realize the switching of the opening and closing of the discharge ends of the coal powder pipeline 15 and the coal powder pipeline 26; the discharge switching component 7 is used to realize the coal powder pipeline 15 and the coal powder pipeline 26 to convey the coal powder into the mixing drum 1 in turn, thereby realizing continuous conveying of the coal powder into the mixing drum 1 without interruption of the coal powder conveying, thereby improving the coal powder conveying efficiency.

[0035] refer to Figure 1 and Figure 4 , wherein the blocking plate 71 is provided in a convex arc-shaped plate, and the outer edge of the blocking plate 71 blocks the discharge port of the pulverized coal pipeline 1 5 or the discharge port of the pulverized coal pipeline 2 6. The discharge ends of the pulverized coal pipeline 1 5 and the pulverized coal pipeline 2 6 are provided in an inverted eight shape in the mixing barrel 1, and the shapes of the discharge ports of the pulverized coal pipeline 1 5 and the pulverized coal pipeline 2 6 are adapted to the outer edge of the blocking plate 71. The driving member 72 includes a rotating rod 721 connected to the inner edge of the blocking plate 71 and a driving motor 722 for driving the blocking plate 71 to rotate. The driving motor 722 is provided outside the mixing barrel 1, and its driving shaft rotates through the mixing barrel 1 and is connected to the other end of the rotating rod 721.

[0036] refer to Figure 1-Figure 3, the air-inflating component 8 is used to fill air into the mixing barrel 1, and includes a shell 81 and an air-inflating pipe 82 which are sleeved on the mixing barrel 1. There is a gap between the inner wall of the shell 81 and the outer edge surface of the mixing barrel 1 to form an air-inflating cavity 9. The air outlet end of the air-inflating pipe 82 is arranged in the air-inflating cavity 9. A plurality of air-inflating holes 10 which are connected with the interior are evenly arranged on the outer edge surface of the mixing barrel 1. Air is transported into the mixing barrel 1 through the air-inflating holes 10. Air is transported into the mixing barrel 1 while transporting coal powder, so that the coal powder and air are evenly mixed.

[0037] refer to Figure 1-Figure 3 A sealing layer 11 is arranged on the outer edge surface of the plugging plate which is in contact with the pulverized coal pipe 1 5 and the pulverized coal pipe 2 6. The sealing layer 11 can be made of steel, which can not only play a wear-resistant role but also ensure the sealing performance of the plugging.

[0038] To sum up: when the pulverized coal-air mixing device is working, the driving member 72 drives the sealing plate 71 to move from the discharge end of the pulverized coal pipe 1 5 to the discharge end of the pulverized coal pipe 2 6 or from the discharge end of the pulverized coal pipe 2 6 to the discharge end of the pulverized coal pipe 1 5 to realize the switching of the opening and closing of the discharge ends of the pulverized coal pipe 1 5 and the pulverized coal pipe 2 6, wherein the length of the sealing plate 71 is set equal to the spacing between the axes of the pulverized coal pipe 1 5 and the pulverized coal pipe 2 6, when the opening and closing of the discharge ends of the pulverized coal pipe 1 5 and the pulverized coal pipe 2 6 are switched, when the discharge end of the pulverized coal pipe 1 5 is partially closed, the discharge end of the pulverized coal pipe 2 6 is partially opened, and the discharge flow rate can still be kept unchanged. When the discharge end of the pulverized coal pipe 5 is completely closed, the pulverized coal pipe 2 6 is completely opened, so that the pulverized coal can be continuously transported into the mixing barrel 1 without interruption in the coal powder transportation, thereby improving the coal powder transportation efficiency.

[0039] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A pulverized coal-air mixing device, characterized in that: include: Mixing cartridge (1); a coal feeding assembly, the coal feeding assembly comprising a first pulverized coal pipeline (5) and a second pulverized coal pipeline (6) arranged at the feeding end of the mixing cylinder (1), the discharge ends of the first pulverized coal pipeline (5) and the second pulverized coal pipeline (6) extending into the interior of the mixing cylinder (1); A discharge switching assembly (7), the discharge switching assembly (7) comprising a blocking plate (71) blocking the discharge end of the first coal pulverized pipe (5) or the discharge end of the second coal pulverized pipe (6) and a driving member (72) driving the blocking plate (71) to move, the length of the blocking plate (71) being equal to the distance between the axes of the first coal pulverized pipe (5) and the second coal pulverized pipe (6), and the blocking plate (71) being driven by the driving member (72) to move from the discharge end of the first coal pulverized pipe (5) to the discharge end of the second coal pulverized pipe (6) or from the discharge end of the second coal pulverized pipe (6) to the discharge end of the first coal pulverized pipe (5) to achieve the switching of the discharge ends of the first coal pulverized pipe (5) and the second coal pulverized pipe (6) to open or close; An air supply component (8), wherein the air supply component (8) is used to fill air into the mixing cylinder (1).

2. The pulverized coal-air mixing device according to claim 1, characterized in that: The blocking plate (71) is provided in the form of a convex arc-shaped plate, the outer edge surface of the blocking plate (71) blocks the discharge port of the pulverized coal pipeline one (5) or the discharge port of the pulverized coal pipeline two (6), the discharge ends of the pulverized coal pipeline one (5) and the pulverized coal pipeline two (6) are provided in the form of an inverted eight in the mixing barrel (1), and the shapes of the discharge ports of the pulverized coal pipeline one (5) and the pulverized coal pipeline two (6) are adapted to the outer edge surface of the blocking plate (71).

3. The pulverized coal-air mixing device according to claim 2, characterized in that: The driving member (72) comprises a rotating rod (721) connected to the inner edge surface of the blocking plate (71) and a driving motor (722) for driving the blocking plate (71) to rotate; the driving motor (722) is arranged outside the mixing barrel (1) and its driving shaft rotates through the mixing barrel (1) and is connected to the other end of the rotating rod (721).

4. The pulverized coal-air mixing device according to any one of claims 1 to 3, characterized in that: The air supply assembly (8) comprises an outer shell (81) sleeved on the mixing cylinder (1) and an air supply pipe (82); a gap exists between the inner wall of the outer shell (81) and the outer edge surface of the mixing cylinder (1) to form an air supply cavity (9); an air outlet end of the air supply pipe (82) is arranged in the air supply cavity (9); and a plurality of air filling holes (10) connected to the interior are evenly arranged on the outer edge surface of the mixing cylinder (1).

5. The pulverized coal-air mixing device according to claim 4, characterized in that: A discharge pipe (2) is provided at the discharge end of the mixing cylinder (1), and a main control valve (3) is provided on the discharge pipe (2).

6. The pulverized coal-air mixing device according to claim 1 or 5, characterized in that: A sealing layer (11) is provided on the outer edge surface of the blocking plate (71) which is in contact with the first coal powder pipeline (5) and the second coal powder pipeline (6).

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