Air powder flow state regulating valve

Abstract

The utility model relates to an air powder flow state regulating valve, which effectively solves the problems of complicated operation, time waste and labor waste when a valve plate of the existing regulating valve is replaced. Comprising an up-down axial valve body and a valve plate which is located in the valve body and can be coaxial with the valve body, a gear-shaped central circulation hole is coaxially formed in the valve plate, a left-right axial rotatable rotating shaft is arranged on the left side of the valve body, a mounting box is arranged at the right end of the rotating shaft, and an arc-shaped mounting groove is coaxially formed in the left end of the valve plate; a fixed shell which is the same as the mounting groove in shape and can be inserted into the mounting groove is arranged at the right end of the mounting box, movable plates which are the same as the fixed shell in shape are arranged on the upper side and the lower side in the fixed shell respectively, and the two movable plates can slide oppositely or oppositely; the opposite ends of the two movable plates are provided with a plurality of limiting columns in one-to-one correspondence with the limiting holes, and the limiting columns are slidably connected with the fixed shell and can be inserted into the limiting holes in the corresponding sides. The device is simple in structure, novel in conception, convenient to use and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of coal-fired boilers, in particular to an air-powder flow state regulating valve. Background Art

[0002] The existing coal powder making system consists of a coal mill and several coal powder pipelines connected to it. The pulverizing system is responsible for grinding the raw coal into coal powder of qualified fineness and transporting it to the boiler for combustion through the coal powder pipeline. However, in the process of transporting coal powder, the coal powder in each transportation pipeline of the pulverizing system is prone to uneven distribution, large deviation in the amount of powder in each branch pipe, large deviation in the air-coal ratio, etc., which will result in insufficient mixing of air and powder in the later stage, unsatisfactory combustion conditions, slow load response, and high combustibles in the furnace. At the same time, due to the uneven air and powder in each branch pipe, rope winding is prone to occur. If stratified air and coal powder enter the burner, it will cause unstable flame and uneven combustion, which will lead to increased unburned carbon, slagging, scouring of furnace walls, and imbalance of carbon monoxide and oxygen.

[0003] Therefore, it is necessary to use an air-powder flow state regulating valve to adjust the coal powder state in the pipeline so that the coal powder can enter the boiler evenly and burn fully. The regulating valve consists of a valve body, a valve plate located in the valve body and a driving mechanism. The coal powder flow rate and distribution in the pipeline are uniform by detecting data and adjusting the inclination angle of the valve plate. However, the existing regulating valve has the following defects when in use: Since the coal powder flows at a very high speed in the pipeline, the surface of the valve plate is subjected to great pressure during use and is easily damaged. Since the existing valve plate and the output shaft of the driving mechanism are fixedly connected using a splint and multiple screws, it is necessary to manually use tools to loosen the multiple screws and replace the new valve plate when replacing it, and then tighten the multiple screws again. The operation is cumbersome and time-consuming and labor-intensive. Utility Model Content

[0004] In view of the above situation, in order to make up for the deficiencies of the prior art, the purpose of the utility model is to provide an air-powder flow state regulating valve, which effectively solves the problem of cumbersome operation, time-consuming and labor-intensive operation when replacing the valve plate of the existing regulating valve.

[0005] The technical solution is as follows: the utility model comprises an up-and-down axial valve body, a valve plate located in the valve body and coaxial with the valve body, a gear-shaped central flow hole is coaxially provided on the valve plate, a left-and-right axial and rotatable rotating shaft is provided on the left side of the valve body, a mounting box is provided on the right end of the rotating shaft, an arc-shaped mounting groove is coaxially provided on the left end of the valve plate, a plurality of limiting holes connected with the mounting groove are respectively provided at the upper and lower ends of the valve plate, a fixed shell which has the same shape as the mounting groove and can be inserted into the mounting groove is provided at the right end of the mounting box, movable plates which have the same shape as the fixed shell are respectively provided on the upper and lower sides of the fixed shell, the two movable plates can slide relative to or away from each other, a plurality of limiting posts which correspond to the limiting holes are respectively provided at the opposite ends of the two movable plates, the limiting posts are slidably connected to the fixed shell and can be inserted into the limiting holes on the corresponding sides.

[0006] Compared with the prior art, the beneficial effects of the utility model are: it can realize timely adjustment of the flow state of coal powder in the transportation pipeline, and at the same time can break up the common rope-like flow form of coal powder in the coal powder pipeline, so that the coal powder in the coal powder pipeline is more evenly distributed, so that the coal powder entering the boiler can be burned more fully, preventing flame instability and uneven combustion, and at the same time the valve plate can be quickly disassembled and replaced. Compared with the traditional screw fixing method, the operation is simple and time-saving and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is the main axonometric drawing of the utility model.

[0008] Figure 2 It is a full-section main axonometric drawing of the utility model.

[0009] Figure 3 It is a full-section top view axonometric drawing of the utility model.

[0010] Figure 4 It is a full-section right-view axonometric drawing of the utility model.

[0011] Figure 5 This utility model Figure 2 A is an enlarged view of the middle image.

[0012] Reference numerals:

[0013] 1. Valve body; 2. Valve plate; 3. Center flow hole; 4. Rotating shaft; 5. Mounting box; 6. Mounting groove; 7. Limit hole; 8. Fixed shell; 9. Moving plate; 10. Limit column; 11. Fixed plate; 12. Permanent magnet motor; 13. Comb hole; 14. Sliding column; 15. Connecting plate; 16. Pressure column; 17. Compression spring; 18. Pressure plate; 19. Mounting plate. DETAILED DESCRIPTION

[0014] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited to the basic implementation disclosed below.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0016] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0017] Depend on Figures 1 to 5 A valve body 1 is provided, which includes an upper and lower axial valve body, a valve plate 2 located in the valve body 1 and coaxial with the valve body 1, a gear-shaped central flow hole 3 is coaxially opened on the valve plate 2, a left side of the valve body 1 is provided with a left and right axial and rotatable rotating shaft 4, a mounting box 5 is provided at the right end of the rotating shaft 4, an arc-shaped mounting groove 6 is coaxially opened at the left end of the valve plate 2, a plurality of limiting holes 7 connected with the mounting groove 6 are respectively opened at the upper and lower ends of the valve plate 2, a fixed shell 8 which is the same shape as the mounting groove 6 and can be inserted into the mounting groove 6 is provided at the right end of the mounting box 5, and movable plates 9 of the same shape are respectively provided on the upper and lower sides of the fixed shell 8, and the two movable plates 9 can slide relative to or opposite to each other, and the opposite ends of the two movable plates 9 are respectively provided with a plurality of limiting columns 10 corresponding to the limiting holes 7, and the limiting columns 10 are slidably connected to the fixed shell 8 and can be inserted into the limiting holes 7 on the corresponding sides.

[0018] In order to rotate the rotating shaft 4, the rotating shaft 4 is rotatably connected to the valve body 1. A fixing plate 11 is provided at the left end of the valve body 1. A permanent magnet motor 12 is provided on the fixing plate 11. The output end of the permanent magnet motor 12 is coaxially and fixedly connected to the rotating shaft 4.

[0019] In order to facilitate the circulation of pulverized coal, a plurality of comb-tooth holes 13 are respectively provided on the front and rear sides of the valve plate 2 .

[0020] In order to enable the two movable plates 9 to move relative to or away from each other, sliding columns 14 are provided on the front and rear sides of the fixed shell 8 in an upper and lower axial direction and slidably connected to the two movable plates 9, a connecting plate 15 is provided on the left end of the movable plate 9, and pressure columns 16 are provided on the back faces of the two connecting plates 15 and slidably connected to the fixed shell 8, and a compression spring 17 is mounted on the pressure column 16 and located between the two movable plates 9.

[0021] In order to facilitate pressing the pressure column 16 , the free end of the pressure column 16 passes through the fixed shell 8 and is provided with a pressure plate 18 .

[0022] In order to facilitate the installation of the valve body 1, annular mounting plates 19 are respectively provided at the upper and lower ends of the valve body 1.

[0023] When the utility model is used, the valve body 1 is first installed on the coal powder conveying pipeline through the installation plate 19, and the coal powder flows through the valve body 1. When the valve plate 2 is completely coaxial with the valve body 1, the central flow hole 3 can allow part of the coal powder to pass directly from the upper side of the valve plate 2 to the lower side. The coal powder flows through the central flow hole 3, which can ensure that the minimum flow rate of the coal powder meets the production demand. At the same time, the comb hole 13 is also used to pass the coal powder. The adjustment method is applied to each coal powder branch pipe. Under the joint action of the coal powder flow through the valve plate 2 and the newly incoming coal powder flow, the coal powder flows into the front cavity. A region with a relatively large air-powder concentration is formed. When the coal powder concentration of the coal powder pipeline is higher than that of other coal powder pipelines, the permanent magnet motor 12 drives the rotating shaft 4 and the fixed shell 8 to rotate, and the fixed shell 8 then drives the limit column 10 to reduce the angle of the valve plate 2, thereby reducing the amount of coal powder entering, thereby reducing the coal powder concentration of the coal powder pipeline. On the contrary, the angle of the valve plate 2 increases and increases the amount of coal powder entering. The comb holes 13 can break up the common rope-like flow form of coal powder in the coal powder pipeline, so that the coal powder in the coal powder pipeline is more evenly distributed, thereby fully burning the coal powder entering the boiler.

[0024] When the valve plate 2 needs to be replaced after being used for a period of time, the permanent magnet motor 12 is turned off, and then the two pressure plates 18 are pressed toward the middle by the left hand. The pressure plate 18 drives the two pressure columns 16 to move toward the middle, and then drives the two movable plates 9 to move toward the middle on the sliding column 14 through the connecting plate 15, and at the same time squeezes the compression spring 17 toward the middle, and the two movable plates 9 drive multiple limiting columns 10 to move toward the middle. After moving a distance toward the middle, multiple limiting columns 10 are pulled out from their corresponding limiting holes 7 to release the fixed limit of the valve plate 2. At this time, the valve plate 2 can be moved to the right with the right hand to disengage the fixed shell 8 from the mounting groove 6, thereby releasing the fixed limit of the valve plate 2, and then the fixed shell 8 is inserted into the mounting groove 6 of the new valve plate 2, and then the pressure plate 18 is released. Due to the loss of pressing force and the restoring force of the compression spring 17, the two movable plates 9 move away from each other, thereby driving multiple limiting columns 10 to move outwards. After moving outwards for a distance, they are respectively inserted into the limiting holes 7 on the corresponding sides again to achieve fixed limit, and then the valve plate 2 can be reused.

[0025] Compared with the prior art, the utility model has the following beneficial effects: the valve plate, valve body, etc. provided can realize timely adjustment of the flow state of coal powder in the transportation pipeline, the angle of the valve plate is reduced, the amount of coal powder entering is reduced, thereby reducing the coal powder concentration in the coal powder pipeline, conversely, the angle of the valve plate is increased to increase the amount of coal powder entering, and at the same time, the common rope-like flow form of coal powder in the coal powder pipeline can be broken up, so that the coal powder in the coal powder pipeline is more evenly distributed, so that the coal powder entering the boiler can be burned more fully, and flame instability and uneven combustion can be prevented, which will lead to an increase in unburned carbon, slagging, scouring of the furnace wall, and imbalance of carbon monoxide and oxygen. At the same time, the valve plate can be quickly disassembled and replaced, and compared with the traditional screw fixing method, the operation is simple and time-saving and labor-saving. This structure is simple, the concept is novel, it is easy to use, and it is highly practical.

[0026] It should be pointed out that, according to the needs of implementation, the various components described in the embodiments of the present utility model can be split into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiments of the present utility model.

[0027] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A wind-powder flow state regulating valve, comprising a valve body (1) in an upper and lower axial direction, and a valve plate (2) located in the valve body (1) and coaxial with the valve body (1), characterized in that: A gear-shaped central flow hole (3) is coaxially provided on the valve plate (2), a left-right axial and rotatable rotating shaft (4) is provided on the left side of the valve body (1), a mounting box (5) is provided at the right end of the rotating shaft (4), an arc-shaped mounting groove (6) is coaxially provided on the left end of the valve plate (2), a plurality of limiting holes (7) communicating with the mounting groove (6) are respectively provided at the upper and lower ends of the valve plate (2), a fixed shell (8) having the same shape as the mounting groove (6) and being insertable into the mounting groove (6) is provided at the right end of the mounting box (5), and movable plates (9) having the same shape as the mounting groove (6) are respectively provided at the upper and lower sides of the fixed shell (8), the two movable plates (9) being slideable relative to or opposite to each other, and a plurality of limiting posts (10) corresponding to the limiting holes (7) are respectively provided at the opposite ends of the two movable plates (9), and the limiting posts (10) are slidably connected to the fixed shell (8) and can be inserted into the limiting holes (7) on the corresponding side.

2. The air-powder flow state regulating valve according to claim 1, characterized in that: The rotating shaft (4) is rotatably connected to the valve body (1); a fixed plate (11) is provided at the left end of the valve body (1); a permanent magnet motor (12) is provided on the fixed plate (11); and an output end of the permanent magnet motor (12) is coaxially fixedly connected to the rotating shaft (4).

3. The air-powder flow state regulating valve according to claim 1, characterized in that: The valve plate (2) is provided with a plurality of comb-tooth holes (13) on both the front and rear sides.

4. The air-powder flow state regulating valve according to claim 1, characterized in that: The fixed shell (8) is provided with sliding columns (14) on the front and rear sides thereof in the upper and lower axial directions and slidably connected to the two movable plates (9), a connecting plate (15) is provided at the left end of the movable plate (9), and pressure columns (16) slidably connected to the fixed shell (8) are provided on the opposite back surfaces of the two connecting plates (15), and a compression spring (17) is sleeved on the pressure column (16) and is located between the two movable plates (9).

5. The air-powder flow state regulating valve according to claim 4, characterized in that: The free end of the pressure column (16) passes through the fixed shell (8) and is provided with a pressure plate (18).

6. The air-powder flow state regulating valve according to claim 1, characterized in that: The valve body (1) is provided with an annular mounting plate (19) at the upper and lower ends respectively.

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