Combined exhaust fan blade

Abstract

The invention relates to the technical field of blades, in particular to a combined type exhaust fan blade which comprises an end head part, a fan blade body and a fan blade body. The number of the blades is four, and the four blades are annularly distributed on the outer portion of the end portion. The connector part comprises an inner cylinder assembly embedded in the outer portion of the end part and an inserting assembly fixed to the end of the blade, and the inserting assembly is inserted into the inner cylinder assembly and locked through an internal rotation assembly; according to the invention, the overall combined type is adopted, the effect of convenient disassembly and assembly is achieved, the cleaning is safer and more efficient through disassembly, meanwhile, the damaged blades can be conveniently and independently replaced, and the cost waste is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of blades, and in particular to a combined exhaust fan blade. Background Art

[0002] The central storage pulverizing system is a coal processing technology. In this process, in order to discharge the processed coal powder from the inside of the equipment, the coal powder is usually discharged with the help of a powder exhaust fan to achieve the purpose of material removal.

[0003] In the existing equipment, because the blades of the dust exhaust fan are in contact with the coal powder for a long time, some of the coal powder will adhere to the surface of the blades. Therefore, the surface structure of the blades will change due to the attached coal powder, which will affect the wind force and further affect the dust exhaust operation. Therefore, the blades need to be disassembled and cleaned;

[0004] However, most of the blades are currently formed in one piece, which makes it inconvenient to disassemble and clean the blades. There is a risk of scratches when cleaning and wiping. At the same time, once a blade is damaged, it needs to be replaced as a whole, which is very costly. Summary of the invention

[0005] In view of the above-mentioned problems existing in the existing combined exhaust fan blades, the present invention is proposed.

[0006] Therefore, an object of the present invention is to provide a combined exhaust fan blade.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a combined exhaust fan blade, comprising:

[0008] The end portion has one end connected to the driving shaft of the powder exhaust fan and is used to achieve rotation with the help of the power of the driving shaft of the powder exhaust fan;

[0009] There are four blades in total, and the four blades are distributed in an annular shape outside the end portion;

[0010] The joint part includes an inner barrel component embedded in the outside of the end part and a plug-in component fixed to the end of the blade, wherein the plug-in component is inserted into the inner barrel component and locked by an inner rotation component;

[0011] The elastic support part is arranged at the rear side of the blade and is used for elastically supporting the blade.

[0012] As a preferred solution of the combined exhaust fan blade of the present invention, the end portion includes a column and a sleeve fixed to one end of the column, and the other end of the column is hemispherical.

[0013] As a preferred solution of the combined exhaust fan blade of the present invention, a keyway is arranged on the inner side of the sleeve, and a bolt is threadedly connected through the outer side of the sleeve.

[0014] As a preferred solution of the combined exhaust fan blade of the present invention, both sides of the blade are serrated.

[0015] As a preferred solution of the combined exhaust fan blade of the present invention, the inner cylinder assembly includes a cylinder body, a cavity is provided inside the cylinder body, and an internal thread groove communicating with the cavity is provided at the upper end of the cylinder body.

[0016] As a preferred solution of the combined exhaust fan blade of the present invention, the cylinder and the end portion are both components made of carbon steel, and the two are integrally formed by casting.

[0017] As a preferred solution of the combined exhaust fan blade of the present invention, the plug-in assembly includes a connecting plate and a plug rod fixed to the bottom of the connecting plate, and the upper end of the connecting plate is fixed to the bottom end of the blade.

[0018] As a preferred solution of the combined exhaust fan blades described in the present invention, the internal rotation component includes a tension member and a driving member, the bottom end of the insertion rod passes through the driving member and is inserted into the tension member, and the rotation of the driving member drives the tension member to contract to complete the fixation of the insertion rod.

[0019] As a preferred solution of the combined exhaust fan blade of the present invention, the elastic supporting part includes a limiting column and a fixing plate, and an elastic rod is connected between the limiting column and the fixing plate.

[0020] As a preferred solution of the combined exhaust fan blades described in the present invention, the length of the elastic rod is longer than the distance between the limiting column and the fixing plate. After the limiting column and the fixing plate are inserted into both ends of the elastic rod respectively, the elastic rod will be deformed into a bow shape as a whole.

[0021] Beneficial effects of the present invention: The present invention adopts a modular type as a whole, which has the effect of convenient disassembly and assembly. Disassembly makes cleaning safer and more efficient. It is also convenient to replace damaged blades individually, reducing cost waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0023] Figure 1 It is a schematic diagram of the overall structure of the combined exhaust fan blades of the present invention.

[0024] Figure 2 It is a schematic structural diagram of the end portion of the combined exhaust fan blade of the present invention.

[0025] Figure 3 It is a schematic structural diagram of the joint portion of the combined exhaust fan blade of the present invention.

[0026] Figure 4 It is a schematic cross-sectional structural diagram of the joint portion of the combined exhaust fan blade of the present invention.

[0027] Figure 5 It is a schematic structural diagram of the plug-in assembly and the inner rotation assembly in the combined exhaust fan blade of the present invention.

[0028] Figure 6 It is a schematic structural diagram of the elastic support portion of the combined exhaust fan blade of the present invention. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0033] Example 1

[0034] Reference Figure 1-5 , provides a combined exhaust fan blade, comprising:

[0035] The end portion 100 has one end connected to the driving shaft of the powder exhaust fan and is used to rotate with the power of the driving shaft of the powder exhaust fan;

[0036] There are four blades 200 in total, and the four blades 200 are distributed in an annular shape outside the end portion 100;

[0037] The joint part 300 includes an inner cylinder component 301 embedded in the outside of the end part 100 and a plug-in component 302 fixed to the end of the blade 200 . The plug-in component 302 is inserted into the inner cylinder component 301 and locked by an inner rotation component 303 .

[0038] When cleaning the blades 200 or when one of the blades 200 is damaged, the inner rotating component 303 can be rotated counterclockwise. After the inner rotating component 303 is rotated, the blade 200 is loosened to complete the disassembly. This structure is very convenient for assembly and disassembly, which can make the cleaning of the blades 200 more efficient and safer, and also facilitate the individual replacement of a damaged blade 200, thereby reducing cost waste.

[0039] Furthermore, the end portion 100 includes a column 101 and a sleeve 102 fixed to one end of the column 101, and the other end of the column 101 is hemispherical.

[0040] Specifically, a keyway 103 is provided on the inner side of the sleeve 102, and a spline is provided on the driving shaft of the powder exhaust fan. When the sleeve 102 is inserted into the driving shaft of the powder exhaust fan, ensure that the spline is inserted into the keyway 103, thereby preventing the problem of slipping and ineffective transmission during rotation. A bolt 104 is threadedly connected through the outer side of the sleeve 102, and the bolt 104 is threadedly connected to the screw hole on the driving shaft of the powder exhaust fan.

[0041] Furthermore, the inner cylinder assembly 301 includes a cylinder 301a, a cavity 301b is formed inside the cylinder 301a, and an internal thread groove 301c connected to the cavity 301b is formed at the upper end of the cylinder 301a, and the inner diameter of the internal thread groove 301c is larger than the inner diameter of the cavity 301b.

[0042] Furthermore, the cylinder 301a and the end portion 100 are both made of carbon steel, and the two are integrally formed by casting to ensure the stability of the overall structure.

[0043] Furthermore, the plug-in assembly 302 includes a connection plate 302 a and a plug rod 302 b fixed to the bottom of the connection plate 302 a , and the upper end of the connection plate 302 a is fixed to the bottom end of the blade 200 .

[0044] Furthermore, the inner rotation component 303 includes a tension member 303a and a driving member 303b. The bottom end of the insertion rod 302b passes through the driving member 303b and is inserted into the tension member 303a. The driving member 303b rotates to drive the tension member 303a to contract to fix the insertion rod 302b.

[0045] Specifically, the tension member 303a includes a base plate 303a-1 and a cylinder 303a-2 fixed above the base plate 303a-1, a conical block is provided at the upper end of the cylinder 303a-2, and cutouts 303a-3 are equidistantly provided on the surface of the cylinder 303a-2, and the cutouts 303a-3 divide the cylinder 303a-2 and the conical block at the upper end into no less than three arc-shaped tension plates.

[0046] A strip block is fixed at the bottom of the insertion rod 302b, and a strip groove is opened in the axial direction of the bottom plate 303a-1. The angle of the insertion rod 302b and the strip groove is fixed, so the angle can be ensured after the blade 200 is inserted.

[0047] The driving member 303b includes a rotating disk 303b-1 and a lower pressure column 303b-2 vertically fixed at the axis of the bottom thereof, a circular hole 303b-3 is penetrated through the axis of the rotating disk 303b-1 and the lower pressure column 303b-2, an external threaded sleeve 303b-4 is fixed to the outer sleeve of the lower pressure column 303b-2, and a conical groove is provided at the bottom of the lower pressure column 303b-2;

[0048] When installing the blade 200, one end with the insertion rod 302b is passed through the circular hole 303b-3 and inserted between the three arc-shaped tension plates. The rotating disk 303b-1 is further rotated, and the external threaded sleeve 303b-4 on the outer side of the rotating disk 303b-1 is threadedly connected with the thread groove 301c. After the rotation, the rotating disk 303b-1 will move downward along the thread direction of the thread groove 301c. During the displacement process, the conical groove at the bottom will fit on the conical block above the cylinder 303a-2. As it moves further downward, the conical groove will squeeze the conical block, thereby causing the three arc-shaped tension plates to deform inward and fit tightly against the insertion rod 302b. The locking installation is completed when the rotating disk 303b-1 cannot rotate.

[0049] During disassembly, the rotating disk 303b-1 is rotated counterclockwise, so that the rotating disk 303b-1 will move upward along the thread direction of the thread groove 301c. During the upward displacement, the conical groove gradually moves away from the conical block, releasing the squeezing of the conical block. When the three arc tension plates lose the squeezing force, they will automatically reset and slightly open outward. At this time, the three arc tension plates do not fit the plug rod 302b, and the disassembly work is completed. This structure is very convenient to disassemble and assemble, which can make the cleaning of the blade 200 more efficient and safer, and it is also convenient to replace a damaged blade 200 separately, reducing cost waste.

[0050] Example 2

[0051] This embodiment is different from the first embodiment in that both sides of the blade 200 are serrated. The design of the serrated blade 200 can break up the larger vortex at the trailing edge boundary layer and decompose it into smaller vortices, thereby reducing the broadband noise generated by the vortex and achieving a noise reduction effect.

[0052] The blade 200 is made of Q235, which has good plasticity and toughness, is suitable for bearing impact and vibration, and maintains structural stability;

[0053] The outside of the blade 200 is coated with a Cr7C3 wear-resistant layer. The carbon content of the Cr7C3 wear-resistant layer is 4-5%, the chromium content is as high as 25-30%, and the volume fraction of Cr7C3 carbide in the metallographic structure is more than 50%. The macro hardness is HRC56-62, and the hardness of chromium carbide is HV1400-1800. Since the carbides are distributed perpendicular to the wear direction, the wear resistance is more than doubled. This design can improve the surface strength of the blade 200, has an anti-scratch effect, and avoids scratches or damage caused by the impact when the blade 200 contacts the particles in the coal powder, thereby effectively improving the service life of the blade 200.

[0054] The rest of the structure is the same as that of Example 1.

[0055] Example 3

[0056] Reference Figure 6 , this embodiment is different from the above embodiment in that: the combined exhaust fan blade of this embodiment further includes:

[0057] The elastic support part 400 is arranged at the rear side of the blade 200 and is used to elastically support the blade 200;

[0058] The elastic supporting part 400 includes a limiting column 401 and a fixing plate 402 , and an elastic rod 403 is connected between the limiting column 401 and the fixing plate 402 .

[0059] Specifically, the limiting column 401 and the end portion 100 are integrally formed, and the fixing plate 402 is fixed to the rear side of the blade 200 by screws. The length of the elastic rod 403 is longer than the distance between the limiting column 401 and the fixing plate 402. After the limiting column 401 and the fixing plate 402 are respectively inserted into both ends thereof, the elastic rod 403 will be deformed into a bow shape as a whole. The elastic rod 403 with a bow-shaped structure is in a stressed state, and its reaction force will provide strong support for the blade 200. At the same time, due to its own elastic characteristics, the impact resistance of the blade 200 is improved to avoid damage to the blade 200 due to collision.

[0060] The rest of the structure is the same as that of Example 2.

[0061] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0062] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0063] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A combined exhaust fan blade, characterized in that: include: The end portion (100) has one end connected to the driving shaft of the powder exhaust fan and is used to rotate with the help of the power of the driving shaft of the powder exhaust fan; There are four blades (200) in total, and the four blades (200) are distributed in an annular shape outside the end portion (100); The joint part (300) comprises an inner cylinder component (301) embedded in the outside of the end part (100) and a plug-in component (302) fixed to the end of the blade (200), wherein the plug-in component (302) is inserted into the inner cylinder component (301) and is locked by an inner rotation component (303); The elastic support portion (400) is arranged on the rear side of the blade (200) and is used to elastically support the blade (200).

2. The combined exhaust fan blade according to claim 1, characterized in that: The end portion (100) comprises a column (101) and a sleeve (102) fixed to one end of the column (101); the other end of the column (101) is hemispherical.

3. The combined exhaust fan blade according to claim 2, characterized in that: A keyway (103) is provided on the inner side of the sleeve (102), and a bolt (104) is threadedly connected through the outer side of the sleeve (102).

4. The combined exhaust fan blade according to claim 3, characterized in that: Both sides of the blade (200) are serrated.

5. The combined exhaust fan blade according to claim 4, characterized in that: The inner cylinder assembly (301) comprises a cylinder (301a), a cavity (301b) is provided inside the cylinder (301a), and an internal thread groove (301c) communicating with the cavity (301b) is provided at the upper end of the cylinder (301a).

6. The combined exhaust fan blade according to claim 5, characterized in that: The cylinder (301a) and the end portion (100) are both components made of carbon steel, and are integrally formed by casting.

7. The combined exhaust fan blade according to claim 6, characterized in that: The plug-in assembly (302) comprises a connection plate (302a) and a plug rod (302b) fixed to the bottom of the connection plate (302a); the upper end of the connection plate (302a) is fixed to the bottom end of the blade (200).

8. The combined exhaust fan blade according to claim 7, characterized in that: The inner rotation component (303) comprises a tension member (303a) and a driving member (303b), the bottom end of the insertion rod (302b) passes through the driving member (303b) and is inserted into the tension member (303a), and the driving member (303b) rotates to drive the tension member (303a) to contract and complete the fixation of the insertion rod (302b).

9. The combined exhaust fan blade according to claim 8, characterized in that: The elastic support part (400) comprises a limiting column (401) and a fixing plate (402), and an elastic rod (403) is connected between the limiting column (401) and the fixing plate (402).

10. The combined exhaust fan blade according to claim 9, characterized in that: The length of the elastic rod (403) is longer than the distance between the limiting column (401) and the fixing plate (402). After the limiting column (401) and the fixing plate (402) are inserted into the two ends of the elastic rod (403), the elastic rod (403) will be deformed to be in a bow shape as a whole.

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