Cement mill fan structure with adjustable inlet and outlet angles

Abstract

The utility model relates to the technical field of cement grinding mill fans, and discloses a cement grinding mill fan structure with adjustable inlet and outlet angles, which comprises a bottom plate, a shell is fixedly arranged at the top end of the bottom plate, a first motor is fixedly arranged at the front end of the shell, and the output end of the first motor penetrates into the shell and is fixedly provided with fan blades. An air inlet pipe is arranged on the left side of the outer shell, an outer frame is arranged between the outer shell and the air inlet pipe, and an air outlet pipe is fixedly arranged on the right side of the outer shell. The air inlet size of the air inlet pipe and the air outlet pipe can be adjusted, the inlet angle and the outlet angle are increased, then the air inlet and outlet amount is increased, the difficulty that dust adheres to the non-working face of the impeller blade can be increased, the non-working face of the blade is not prone to dust accumulation, and the efficiency of the fan is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cement mill fans, in particular to a cement mill fan structure with adjustable inlet and outlet angles. Background Art

[0002] Cement mill is an important process in cement processing. Cement mill is the key equipment for crushing materials after they are broken. The cement grinding process requires the use of conveying mechanism, powder selection mechanism and dust removal mechanism. Ball mill occupies a very important position in cement production. Cement grinding is the last and most important key link in controlling cement quality. To a certain extent, the grinding quality can make up for the shortcomings of clinker quality and ensure the qualified rate of cement leaving the factory.

[0003] The existing cement mill fan is not easy to adjust the inlet angle and outlet angle when in use, and the inlet and outlet air volumes are generally fixed, so that dust is easily adhered to the impeller when induced air, increasing the difficulty on the non-working surface of the blade, making the non-working surface of the blade itself easy to accumulate dust, reducing the efficiency of the fan, and the existing cement mill enters the powder classifier through the elevator after grinding. The powder classifier will diffuse a large amount of dust carrying gas when in use, and it is necessary to use a bag dust collector for purification. The purified gas is discharged to the outside through the main exhaust fan. The bag dust collector purifies the gas and intercepts the dust inside the gas through the internal filter bag, but the gas smaller than the filter bag will pass through the bag. Although this type of tiny gas can meet the emission requirements, it will adhere to the fan rotor. When the rotor rotates, it will rub against the inner wall of the fan. Long-term use will cause wear of the inner shell of the fan. Therefore, technical personnel in this field provide a cement mill fan structure with adjustable inlet and outlet angles to solve the problems raised in the above background technology. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a cement mill fan structure with adjustable inlet and outlet angles, which has the advantages of adjustability and filtering, and solves the above-mentioned technical problems.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cement mill fan structure with adjustable inlet and outlet angles, comprising a bottom plate, a shell is fixedly arranged on the top of the bottom plate, a first motor is fixedly arranged on the front end of the shell, an output end of the first motor passes through the inside of the shell and a fan blade is fixedly arranged, an air inlet pipe is arranged on the left side of the shell, an outer frame is arranged between the shell and the air inlet pipe, an air outlet pipe is fixedly arranged on the right side of the shell, a filtering mechanism is arranged inside the outer frame, and an adjustment mechanism is arranged inside the air inlet pipe and the air outlet pipe;

[0008] The adjustment mechanism includes: the inside of the air inlet pipe and the air outlet pipe are both rotatably connected with wind shields via bearings, a group of fixed blocks are fixedly arranged on the inner bottom end of the air inlet pipe and the air outlet pipe and on the side away from the two wind shields, the two groups of fixed blocks are rotatably connected with screw rods via bearings, and second motors are fixedly arranged on the two fixed blocks located on the outside, the output ends of the two second motors are fixedly connected with two screw rods, the outer surfaces of the two screw rods are threadedly connected with moving blocks, and the top ends of the two moving blocks are hinged with rotating columns.

[0009] As an optimal technical solution of the present utility model, the filtering mechanism includes: a group of telescopic rods are fixedly provided on the inner right side wall of the outer frame, a group of telescopic rods are fixedly provided with filter plates at the telescopic ends, a group of telescopic rods are provided with springs on the outside, a third motor is fixedly provided on the rear end of the outer frame, the output end of the third motor passes through the interior of the outer frame and is fixedly provided with a shaft column, one end of the shaft column is rotatably connected to the inner front end of the outer frame via a bearing, two cams are fixedly provided on the outer surface of the shaft column, and a group of feed pipes are fixedly provided on the bottom end of the outer frame, and one end of the feed pipes passes through the interior of the collection box.

[0010] As a preferred technical solution of the present utility model, the two cams are symmetrically arranged.

[0011] As a preferred technical solution of the utility model, one end of the air inlet pipe is connected to the interior of the outer frame, and the right side of the outer frame is connected to the interior of the outer shell through the delivery pipe.

[0012] As a preferred technical solution of the utility model, threaded holes matching the outer surfaces of the two screw rods are provided on the two moving blocks.

[0013] As a preferred technical solution of the utility model, one end of the two rotating columns is hinged to the two side walls of the windshield respectively.

[0014] Compared with the prior art, the utility model provides a cement mill fan structure with adjustable inlet and outlet angles, which has the following beneficial effects:

[0015] 1. The utility model is provided with an adjustment mechanism. When in use, the wind shield, the fixed block, the screw, the second motor, the movable block and the rotating column are used in coordination to adjust the air inlet size of the air inlet pipe and the air outlet pipe. By increasing the inlet angle and the outlet angle, the air inlet and outlet volumes are increased, which can increase the difficulty of dust adhering to the non-working surface of the impeller blade, making the non-working surface of the blade itself less likely to accumulate dust, thereby improving the efficiency of the fan.

[0016] 2. The utility model is provided with a filtering mechanism. When the introduced wind passes through the outer frame during use, the filter plate is used to filter dust to prevent dust from remaining in the outer shell and increasing the wear of the fan blades, thereby facilitating the normal use of the fan blades. When cleaning the filter plate, the third motor, shaft column, cam, telescopic rod and spring are used in coordination to collect dust, thereby facilitating better filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the connection between the first motor and the fan blades of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the connection between the rotating column and the wind shield of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the connection between the shaft column and the cam of the utility model.

[0021] Among them: 1. bottom plate; 2. outer shell; 3. first motor; 4. fan blades; 5. outer frame; 6. air inlet pipe; 7. air outlet pipe; 8. filtering mechanism; 801. telescopic rod; 802. filter plate; 803. spring; 804. third motor; 805. shaft column; 806. cam; 807. feed pipe; 808. collection box; 809. conveying pipe; 9. adjustment mechanism; 901. wind shield; 902. fixed block; 903. screw rod; 904. second motor; 905. moving block; 906. rotating column. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0023] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figure 1-Figure 4 A cement mill fan structure with adjustable inlet and outlet angles comprises a bottom plate 1, a shell 2 is fixedly arranged on the top of the bottom plate 1, a first motor 3 is fixedly arranged on the front end of the shell 2, a fan blade 4 is fixedly arranged inside the output end of the first motor 3 penetrating through the shell 2, an air inlet pipe 6 is fixedly arranged on the left side of the shell 2, an outer frame 5 is arranged between the shell 2 and the air inlet pipe 6, an air outlet pipe 7 is fixedly arranged on the right side of the shell 2, a filtering mechanism 8 is arranged inside the outer frame 5, and an adjustment mechanism 9 is arranged inside the air inlet pipe 6 and the air outlet pipe 7;

[0026] The adjustment mechanism 9 includes: the inside of the air inlet pipe 6 and the air outlet pipe 7 are both rotatably connected with wind shields 901 through bearings, a group of fixed blocks 902 are fixedly arranged at the bottom end of the inside of the air inlet pipe 6 and the air outlet pipe 7 and on the side away from the two wind shields 901, and the two groups of fixed blocks 902 are rotatably connected with screw rods 903 through bearings, and the second motors 904 are fixedly arranged on the two fixed blocks 902 located on the outside, and the output ends of the two second motors 904 are fixedly connected with the two screw rods 903, and the outer surfaces of the two screw rods 903 are threadedly connected with moving blocks 905, and the tops of the two moving blocks 905 are hinged with rotating columns 906; the two moving blocks 905 are provided with threaded holes that match the outer surfaces of the two screw rods 903; one end of the two rotating columns 906 is respectively hinged to the side walls of the two wind shields 901.

[0027] Furthermore, when in use, the first motor 3 is started to drive the fan blades 4 to rotate, and the gas is transported to the inside of the outer frame 5 through the air inlet pipe 6, and then discharged through the air outlet pipe 7 after passing through the outer shell 2. When adjusting the angle, the two second motors 904 are started to drive the two screw rods 903 to rotate forward and reverse, and the two moving blocks 905 then move left and right outside the two screw rods 903, and the two rotating columns 906 rotate accordingly, thereby causing the two wind shield plates 901 to rotate. When in use, the size of the air intake of the air inlet pipe 6 and the air outlet pipe 7 can be adjusted, and the inlet and outlet angles can be increased to increase the inlet and outlet air volumes, which can increase the difficulty of dust sticking to the non-working surface of the impeller blades, making the non-working surface of the blades themselves less likely to accumulate dust, thereby improving the efficiency of the fan.

[0028] The filtering mechanism 8 includes: a group of telescopic rods 801 are fixedly provided on the inner right side wall of the outer frame 5, the telescopic ends of the group of telescopic rods 801 are fixedly provided with filter plates 802, the outsides of the group of telescopic rods 801 are provided with springs 803, the rear end of the outer frame 5 is fixedly provided with a third motor 804, the output end of the third motor 804 passes through the interior of the outer frame 5 and is fixedly provided with a shaft column 805, one end of the shaft column 805 is rotatably connected to the inner front end of the outer frame 5 through a bearing, two cams 806 are fixedly provided on the outer surface of the shaft column 805, a group of discharge pipes 807 are fixedly provided at the bottom end of the outer frame 5, one end of the group of discharge pipes 807 is connected to the interior of the collection box 808; the two cams 806 are symmetrically arranged; one end of the air inlet pipe 6 is connected to the interior of the outer frame 5, and the right side of the outer frame 5 is connected to the interior of the outer shell 2 through the conveying pipe 809.

[0029] Furthermore, during use, when the introduced wind passes through the outer frame 5, the filter plate 802 is provided to filter dust to prevent dust from remaining in the outer shell 2 and increasing the wear of the fan blades 4, so as to facilitate the normal use of the fan blades 4. When cleaning the filter plate 802, the third motor 804 is started to drive the shaft column 805 to rotate, and its two cams 806 touch the filter plate 802. At the same time, a group of telescopic rods 801 shrinks, and a group of springs 803 is compressed. The shaking dust passes through a group of discharge pipes 807 and falls into the collection box 808.

[0030] Working principle: When in use, start the first motor 3 to drive the fan blades 4 to rotate, and the gas is transported to the inside of the outer frame 5 through the air inlet pipe 6. The filter plate 802 is used to filter dust to prevent dust from remaining in the outer shell 2 and increasing the wear of the fan blades 4, so as to facilitate the normal use of the fan blades 4. When cleaning the filter plate 802, start the third motor 804 to drive the shaft column 805 to rotate, and its two cams 806 touch the filter plate 802. At the same time, a group of telescopic rods 801 shrinks, a group of springs 803 compresses, and the shaking dust falls into the collection box 808 through a group of discharge pipes 807. As the fan blades 4 rotate, After passing through the shell 2, the gas is discharged through the air outlet pipe 7. When the angle needs to be adjusted, the two second motors 904 are started to drive the two screw rods 903 to rotate forward and reverse, and the two moving blocks 905 then move left and right outside the two screw rods 903, and the two rotating columns 906 rotate accordingly, thereby causing the two wind shields 901 to rotate. When in use, the air intake size of the air inlet pipe 6 and the air outlet pipe 7 can be adjusted, and the air intake and outlet volume can be increased by increasing the inlet angle and the outlet angle, thereby increasing the difficulty of dust sticking to the non-working surface of the impeller blade, making the non-working surface of the blade itself less likely to accumulate dust, thereby improving the efficiency of the fan.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cement mill fan structure with adjustable inlet and outlet angles, comprising a bottom plate (1), characterized in that: A housing (2) is fixedly provided at the top of the bottom plate (1), a first motor (3) is fixedly provided at the front end of the housing (2), an output end of the first motor (3) passes through the housing (2) and a fan blade (4) is fixedly provided inside the housing (2), an air inlet pipe (6) is provided on the left side of the housing (2), an outer frame (5) is provided between the housing (2) and the air inlet pipe (6), an air outlet pipe (7) is fixedly provided on the right side of the housing (2), a filtering mechanism (8) is provided inside the outer frame (5), and an adjustment mechanism (9) is provided inside the air inlet pipe (6) and the air outlet pipe (7); The adjustment mechanism (9) comprises: the inside of the air inlet pipe (6) and the air outlet pipe (7) are both rotatably connected to wind shield plates (901) via bearings; a group of fixed blocks (902) are fixedly arranged at the bottom ends of the inside of the air inlet pipe (6) and the air outlet pipe (7) and on the side away from the two wind shield plates (901); screw rods (903) are rotatably connected between the two groups of fixed blocks (902) via bearings; second motors (904) are fixedly arranged on the two fixed blocks (902) located on the outside; the output ends of the two second motors (904) are both fixedly connected to the two screw rods (903); the outer surfaces of the two screw rods (903) are both threadedly connected to moving blocks (905); and the top ends of the two moving blocks (905) are both hinged with rotating columns (906).

2. A cement mill fan structure with adjustable inlet and outlet angles according to claim 1, characterized in that: The filtering mechanism (8) comprises: a group of telescopic rods (801) are fixedly provided on the right side wall of the inner part of the outer frame (5); a filter plate (802) is fixedly provided at the telescopic ends of the group of telescopic rods (801); a spring (803) is provided on the outside of the group of telescopic rods (801); a third motor (804) is fixedly provided at the rear end of the outer frame (5); an output end of the third motor (804) passes through the interior of the outer frame (5) and is fixedly provided with a shaft column (805); one end of the shaft column (805) is rotatably connected to the inner front end of the outer frame (5) via a bearing; two cams (806) are fixedly provided on the outer surface of the shaft column (805); a group of discharge pipes (807) are fixedly provided at the bottom end of the outer frame (5); one end of the group of discharge pipes (807) passes through the interior of a collection box (808).

3. A cement mill fan structure with adjustable inlet and outlet angles according to claim 2, characterized in that: The two cams (806) are symmetrically arranged.

4. The cement mill fan structure with adjustable inlet and outlet angles according to claim 2 is characterized in that: One end of the air inlet pipe (6) is connected to the interior of the outer frame (5), and the right side of the outer frame (5) is connected to the interior of the outer shell (2) through the delivery pipe (809).

5. The cement mill fan structure with adjustable inlet and outlet angles according to claim 1 is characterized in that: The two moving blocks (905) are both provided with threaded holes that match the outer surfaces of the two screw rods (903).

6. The cement mill fan structure with adjustable inlet and outlet angles according to claim 1 is characterized in that: One end of the two rotating columns (906) is hinged to the side walls of the two windshield plates (901) respectively.

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