A material lifting blade and drying cylinder for forming a uniform material curtain

Abstract

The utility model relates to the field of drying roller, concretely relates to a material lifting blade forming uniform material curtain, is arranged on the inner wall of drying roller, including short harrow tooth group, long harrow tooth group and base plate, the harrow tooth of short harrow tooth group and long harrow tooth group is composed of vertical section and first bending section, and the vertical section of harrow tooth is fixedly connected on base plate, short harrow tooth group is composed of several short harrow teeth of different height, long harrow tooth group is composed of several long harrow teeth of same height, short harrow tooth in short harrow tooth group is arranged in succession according to height from low to high, and the highest short harrow tooth of short harrow tooth group is adjacent arrangement with long harrow tooth group. The material lifting blade structure of above-mentioned has increased the sustained uniformity of material curtain. The utility model further provides a drying roller including above-mentioned material lifting blade and cylinder, and the drying roller can form stable and uniform material curtain in the production process, improves the uniformity of drying roller stirring, can reduce the power consumption, thereby improves construction quality.

Description

Technical Field

[0001] This utility model relates to the field of drying drums, specifically to a material lifting blade that forms a uniform material curtain. Furthermore, this utility model also relates to a drying drum including the aforementioned material lifting blade. Background Technology

[0002] Authorized publication number CN209759957U discloses a recycled material drying drum and its lifting structure. The lifting structure provided by this utility model includes a base plate, a connector, multiple lifting blades, and multiple chain links. One end of the connector is connected to the base plate, and the other end is connected to the inner wall of the drum. The lifting blades are a rake-tooth blade structure, which reduces the contact area between the recycled material and the blades. The spacing of the rake teeth mitigates the impact of adhering material on the blades, allowing recycled asphalt material to leak through the gaps in the rake teeth during the lifting process, forming a better material curtain. Furthermore, the chain links enable self-cleaning of the blades.

[0003] During the material lifting process, the material curtain provided by the above-mentioned utility model concentrates on the left side of the drum, while the material curtain on the right side is relatively sparse. It is mainly formed by some recycled asphalt falling from the gaps between the rake teeth, with a large amount of material still forming a throwing surface before falling, concentrating on the left side. Even after prolonged use, it is still affected by material adhesion. After material adheres inside the drum, the gaps between the rake teeth of the blades become filled with adhesive, and the amount of adhesive inside gradually increases, affecting the material holding capacity and the material curtain, thus altering the material curtain formed when the drying drum rotates. At this point, due to the material holding effect of the blades, the material curtain will concentrate in the latter half of the vertical surface of the drum after the blades have rotated, resulting in poor heat exchange. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a lifting blade for forming a uniform material curtain and a drying drum including the above-mentioned lifting blade.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A lifting blade for forming a uniform material curtain is disposed on the inner wall of a drying drum, including a short rake tooth group, a long rake tooth group, and a base plate. The rake teeth of the short rake tooth group and the long rake tooth group are composed of a vertical section and a first bending section, and the vertical section of the rake tooth is fixedly connected to the base plate. The short rake tooth group is composed of several short rake teeth of different heights, and the long rake tooth group is composed of several long rake teeth of the same height. The short rake teeth in the short rake tooth group are arranged continuously from low to high height, and the short rake tooth with the highest height in the short rake tooth group is arranged adjacent to the long rake tooth group.

[0006] Furthermore, the short rake tooth group includes a first short rake tooth group and a second short rake tooth group, and the long rake tooth group includes a first long rake tooth group and a second long rake tooth group. The first short rake tooth group and the second short rake tooth group are continuously arranged in the middle of the substrate, and the first long rake tooth group and the second long rake tooth group are symmetrically arranged on both sides of the substrate.

[0007] Furthermore, the first short rake tooth group and the second short rake tooth group are symmetrically distributed on the substrate, and the first long rake tooth group and the second long rake tooth group are symmetrically distributed on the substrate.

[0008] Furthermore, the vertical sections of the short rake teeth and the long rake teeth have the same height.

[0009] Furthermore, it also includes a first connector, one end of which is fixedly connected to the inner wall of the roller, and the other end of which is fixedly connected to the substrate. The first connector includes a vertical connecting section and a horizontal connecting section, and the horizontal connecting section is connected to the bottom end of the vertical connecting section.

[0010] Furthermore, it also includes a second connector, the first connector being connected to the inner wall of the cylinder via the second connector, the vertical connecting section being connected to the second connector, and the bottom of the horizontal connecting section being at the same horizontal plane as the bottom of the second connector.

[0011] Furthermore, it also includes a chain, one end of which is fixedly connected to the bottom of the substrate, and the other end of which is suspended. When the drying drum rotates, the suspended end of the chain can rub against the inner wall of the drum and the lifting blades.

[0012] Furthermore, the long rake tooth assembly also includes a second bending section, wherein the bending directions of the first bending section and the second bending section are the same.

[0013] Furthermore, the angle between the first bending segment and the vertical segment is greater than the angle between the second bending segment and the vertical segment.

[0014] Meanwhile, this utility model also provides a drying drum, including a drum body and lifting blades. The lifting blades are the aforementioned lifting blades, and are disposed on the inner wall of the drum body.

[0015] As can be seen from the above description, the lifting blades provided by this utility model for forming a uniform material curtain increase the stability and uniformity of the material curtain inside the drying drum during operation. At the same time, the lifting blades can be adapted to different drum structures and working conditions.

[0016] The lifting blades provided by this utility model have a notched rake tooth structure composed of short rake tooth groups and long rake tooth groups. The high position of the rake teeth can ensure that the blades can hold a large amount of material, while the low position of the rake teeth can allow the material to form a material curtain in advance. In this way, the material curtain can be formed from the beginning to the end during the rotation of the blades in the drum, and even if material sticking occurs between the rake teeth, a uniform material curtain can still be guaranteed.

[0017] The lifting blades can be raised or directly contact the inner wall of the drum, and their installation method can be connecting to the first connecting piece via a second connector or direct welding, etc. Meanwhile, the rake teeth can be formed by cutting and welding sheet metal or bending and welding round steel, but all are made in the form of notches. These notches can be on one side or in the middle of the blade body, or they can be formed by the staggered heights of the rake teeth on the blade body, thus enabling the lifting blades to achieve the function of uniformly distributing material.

[0018] In addition, the high-temperature zone inside the drum can use lifting blades without chains, as the high-temperature environment can reduce the problem of material sticking to the blades, while the low-temperature zone can use lifting blades with chains, which enhance self-cleaning through the chain structure.

[0019] This invention also provides a drying drum comprising the aforementioned lifting blades and cylinder, enabling the formation of a stable and uniform material curtain within the drum under different operating conditions. This drying drum can form a stable and uniform material curtain during production, improving the uniformity of mixing within the drum, reducing power consumption, and thus improving construction quality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the material lifting blade structure, in which the rake teeth are formed by bending round steel.

[0021] Figure 2 This is a schematic diagram of the material lifting blade structure of the present invention, in which the rake teeth are cut from a sheet metal.

[0022] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present invention.

[0023] Figure 4 This is a structural schematic diagram of the third embodiment of the present utility model.

[0024] Figure 5 This is a structural schematic diagram of the fourth embodiment of the present utility model.

[0025] Figure 6 This is a structural schematic diagram of the fifth embodiment of the present utility model.

[0026] Figure 7 This is a schematic diagram of the drying drum structure equipped with lifting blades according to this utility model.

[0027] In the diagram: 1. Short rake tooth assembly; 1a. First short rake tooth assembly; 1b. Second short rake tooth assembly; 11. Short rake tooth; 2. Long rake tooth assembly; 2a. First long rake tooth assembly; 2b. Second long rake tooth assembly; 21. Long rake tooth; 3. Base plate; 4. First connector; 41. Vertical connecting section; 42. Horizontal connecting section; 5. Second connector; 6. Chain; 7. Cylinder. Detailed Implementation

[0028] The present invention will be further described below through specific embodiments.

[0029] like Figures 1 to 7 As shown, the lifting blades for forming a uniform material curtain according to this utility model include a short rake tooth group 1, a long rake tooth group 2, and a base plate 3. The rake teeth of the short rake tooth group 1 and the long rake tooth group 2 are composed of vertical sections and first bent sections. The vertical sections of the rake teeth are fixedly connected to the base plate 3. The short rake tooth group 1 consists of several short rake teeth 11 of different heights, and the long rake tooth group 2 consists of several long rake teeth 21 of the same height. The vertical sections of the short rake teeth 11 and the long rake teeth 21 are of the same height. The short rake teeth 11 in the short rake tooth group 1 are arranged continuously from low to high height, and the tallest short rake tooth 11 in the short rake tooth group 1 is arranged adjacent to the long rake tooth group 2.

[0030] Furthermore, the rake teeth of the aforementioned lifting blades can be formed by cutting and welding sheet metal, bending round steel, etc. They utilize a variety of rake tooth structures composed of the same or different materials arranged at intervals. Simultaneously, the connection method can be to connect the second connector 5 to the first connector 4 or directly weld it to the cylinder 7. Alternatively, by using staggered rake teeth on the lifting blades to create gaps, a more uniform material curtain can be achieved.

[0031] First Embodiment

[0032] like Figure 1 and Figure 2 As shown, the rake teeth of the blade are formed by bending round steel and cutting sheet metal. Short rake tooth group 1 is arranged on one side of the base plate 3, where the height of the rake teeth gradually increases from one side to the other, i.e., in the direction of material flow. At the same time, several rake teeth of the same height are welded or cut at the position of the last and highest rake tooth to form long rake tooth group 2, which increases the material holding capacity of the blade. The lifting blade is directly fixed to the inner wall of the cylinder 7 by welding inside the drum.

[0033] Second Embodiment

[0034] like Figure 3 As shown. The rake tooth structure of the blade is formed by cutting a plate. The lifting blade has a short rake tooth group 1 arranged on one side of the base plate 3, where the height of the rake teeth gradually increases from one side to the other, i.e., in the direction of material flow. At the same time, several rake teeth of the same height are left at the last position to form a long rake tooth group 2, increasing the material holding capacity. The lifting blade also includes a connecting assembly 4, which includes a vertical connecting section 41 and a horizontal connecting section 42. The bottom end of the horizontal connecting section 42 is connected to the vertical connecting section 41. At the same time, the first connecting member 4 is connected to the inner wall of the cylinder 7 through the second connecting member 5. The vertical connecting section 41 is connected to the second connecting member 5, and the bottom of the horizontal connecting section 42 is at the same level as the bottom of the second connecting member 5.

[0035] Third Embodiment

[0036] like Figure 4 As shown. Similar to the second embodiment, the difference lies in that the notch of the lifting blade is formed in the middle of the blade, that is, the rake teeth are evenly arranged from low to high from the middle of the base plate 3 to both sides, that is, the first short rake tooth group 1a and the second short rake tooth group 1b are symmetrically distributed in the middle of the base plate 3. At the same time, the first long rake tooth group 2a and the second long rake tooth group 2b are located at the last position on both sides, that is, several rake teeth of the same height are left to increase the material holding capacity. This can also ensure the uniformity of the material curtain.

[0037] Fourth embodiment

[0038] like Figure 5 As shown. The lifting blade structure described in the second embodiment can be equipped with a chain 6 to reduce material adhesion on the blade surface and further ensure the stability and uniformity of the material curtain.

[0039] Fifth Embodiment

[0040] like Figure 6 As shown. The lifting blade structure described in the third embodiment can be equipped with a chain 6 to reduce material adhesion on the blade surface and further ensure the stability and uniformity of the material curtain.

[0041] The working principle of the lifting blades for forming a uniform material curtain described in this utility model is as follows: During the lifting process, at the lower position of the rake teeth, i.e., the notch position, the recycled asphalt material will reach the throwing angle first, and this part of the recycled asphalt material will fall first. As the drum rotates, the lifting blades will steadily throw material as the height of the rake teeth increases, making the material curtain on the right side denser and the material curtain on the left side thinner, thereby achieving a more uniform material curtain effect. Furthermore, even if material adheres to the blade surface in the recycling drum, causing the gaps between the rake teeth to stick, the notched rake tooth structure can still ensure the stability of the material curtain, thereby reducing the impact of material adhering inside the drum on the material curtain and ensuring that it is always in a good heat exchange state.

[0042] This utility model also provides a drying drum including the above-mentioned lifting blades and a drum body, wherein the conventional arrangement of the lifting blades inside the drum is as follows: Figure 7 As shown, this roller rotates counterclockwise. During production, this drying roller forms a stable and uniform material curtain, improving the uniformity of mixing within the roller, reducing power consumption, and thus improving construction quality.

[0043] The above are only some specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A type of lifting blade for forming a uniform material curtain, disposed on the inner wall of a drying drum, characterized in that: It includes a short rake tooth group (1), a long rake tooth group (2) and a base plate (3). The rake teeth of the short rake tooth group (1) and the long rake tooth group (2) are composed of a vertical section and a first bending section. The vertical section of the rake tooth is fixedly connected to the base plate (3). The short rake tooth group (1) is composed of several short rake teeth (11) of different heights. The long rake tooth group (2) is composed of several long rake teeth (21) of the same height. The short rake teeth (11) in the short rake tooth group (1) are arranged continuously from low to high height. The short rake tooth (11) with the highest height in the short rake tooth group (1) is arranged adjacent to the long rake tooth group (2).

2. The lifting blades for forming a uniform material curtain according to claim 1, characterized in that: The short rake tooth group (1) includes a first short rake tooth group (1a) and a second short rake tooth group (1b), and the long rake tooth group (2) includes a first long rake tooth group (2a) and a second long rake tooth group (2b). The first short rake tooth group (1a) and the second short rake tooth group (1b) are continuously arranged in the middle of the substrate (3), and the first long rake tooth group (2a) and the second long rake tooth group (2b) are symmetrically arranged on both sides of the substrate (3).

3. The lifting blades for forming a uniform material curtain according to claim 2, characterized in that: The first short rake tooth group (1a) and the second short rake tooth group (1b) are symmetrically distributed on the substrate (3), and the first long rake tooth group (2a) and the second long rake tooth group (2b) are symmetrically distributed on the substrate (3).

4. The lifting blades for forming a uniform material curtain according to claim 1, characterized in that: The vertical sections of the short rake teeth (11) and the long rake teeth (21) have the same height.

5. The lifting blades for forming a uniform material curtain according to claim 1, characterized in that: It also includes a first connector (4), one end of which is fixedly connected to the inner wall of the roller, and the other end of which is fixedly connected to the substrate (3). The first connector (4) includes a vertical connecting section (41) and a horizontal connecting section (42), and the horizontal connecting section (42) is connected to the bottom end of the vertical connecting section (41).

6. The lifting blades for forming a uniform material curtain according to claim 5, characterized in that: It also includes a second connector (5), the first connector (4) is connected to the inner wall of the cylinder through the second connector (5), the vertical connecting section (41) is connected to the second connector (5), and the bottom of the horizontal connecting section (42) is at the same level as the bottom of the second connector (5).

7. The lifting blades for forming a uniform material curtain according to claim 1, characterized in that: It also includes a chain (6), one end of which is fixedly connected to the bottom of the substrate (3), and the other end of which is suspended. When the drying drum rotates, the suspended end of the chain (6) can rub against the inner wall of the drum and the lifting blades.

8. The lifting blades for forming a uniform material curtain according to claim 1, characterized in that: The long rake tooth group (2) also includes a second bending section, and the bending directions of the first bending section and the second bending section are the same.

9. The lifting blades for forming a uniform material curtain according to claim 8, characterized in that: The angle between the first bending segment and the vertical segment is greater than the angle between the second bending segment and the vertical segment.

10. A drying drum, comprising a drum body (7) and lifting blades, characterized in that: The lifting blade is the lifting blade according to any one of claims 1 to 9, and the lifting blade is disposed on the inner wall of the cylinder (7).

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