Spiral conveying preheater
By using a cloth plate to control the coating thickness of the spiral blades in the screw conveying preheating machine, the problem of uneven material distribution is solved, uniform heating of materials and improved heat utilization, and the service life of the equipment is extended.
Patent Information
- Application Number
- CN202420266918.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-03
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-02-03
AI Technical Summary
The material distribution in the existing four-axis spiral preheating machine is uneven, resulting in insufficient accumulation of some materials and heat loss, affecting production stability and energy consumption.
Design a screw conveying preheating machine that includes at least two spiral shafts. Helical blades are provided on the outside of each spiral shaft, and fabric plates are installed on both sides of the shell to control the coating thickness of the spiral blades, ensure the uniform distribution of the materials, and through wear-resistant steel plates and adjustments Bolts improve the strength and adjustment of the fabric plate.
It realizes uniform distribution and heating of materials, reduces heat loss, improves the conveying and heating efficiency of the screw conveying preheater, and extends the service life of the fabric plate.
Smart Images
Figure CN222187834U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of spiral conveying and heating of materials, in particular to a spiral conveying preheating machine. Background Art
[0002] The raw anode products for aluminum electrolysis need to be preheated during the production process. The existing preheating device is a four-axis spiral preheater, which includes four equally spaced spiral shafts, spiral blades are arranged on the outside of the spiral shafts, the center lines of the four spiral shafts are parallel to each other and in the same plane, and the rotation directions of two adjacent spiral shafts are opposite, so that the material is transported from one end of the spiral blade to the other end of the spiral blade. When using a four-axis spiral preheater to preheat the material, the ideal state is that after the material enters the four-axis spiral preheater, it is evenly spread in the gap between the four-axis spirals to achieve a uniform heating effect.
[0003] The actual situation is that the material is often not evenly distributed in the gaps of the four-axis spiral. The material is accumulated between some spirals, and some materials are accumulated on the spiral surface and are transported to the next process, so that this part of the material cannot be fully heated. There is only a small amount of material between some spirals, and the spiral heating blades are exposed, so that a large amount of heat is lost and sucked away by the dust collector. Uneven material heating affects the stability and energy consumption of subsequent production, resulting in increased production costs.
[0004] The patent with the authorization announcement number CN 219448220 U discloses a shaftless screw conveyor, which is designed with a scraper on the top of the screw conveyor blade. When the screw conveyor blade rotates, the scraper scrapes the material on the top of the inner wall of the transmission shell, thereby avoiding the situation where the material adheres. The scraper is used to clean the material on the inner wall of the shell, and cannot be used to make the material pass through the screw conveyor evenly.
[0005] The patent with the authorization announcement number CN 219652020 U discloses a spiral feeder, including a spiral feed shaft, the two ends of which are respectively mounted on two feed vertical plates through bearings, one end of which passes through the bearing and is connected to the motor, a groove is provided at the top of the feed vertical plate, a spiral adjustment fixing plate is provided at the top of the groove, a screw is installed in the middle of the spiral adjustment fixing plate, the bottom of the screw is connected to a slider, and a scraper is installed between the two sliders. There is only one spiral feed shaft in the spiral feeder, and the blades of the spiral feed shaft are divided into two sections, and the rotation directions of the two sections are different, so the spiral feeder cannot be used to transport materials from one end of the spiral feed shaft to the other end. The spiral feeder adjusts the height of the scraper by adjusting the screw, and can adjust the position of the puffed food to solve the problem of uneven distribution of the puffed food, but the center line of the spiral feed shaft is parallel to the plane corresponding to the scraper, and the scraper can only solve the problem of uneven distribution of one spiral feed shaft, and cannot solve the problem of uneven material on both sides of one spiral shaft in the multi-shaft spiral preheater. Utility Model Content
[0006] The utility model provides a screw conveying preheating machine, which solves the problem that materials are unevenly distributed when passing through each screw and the materials cannot be evenly heated.
[0007] The technical solution adopted by the utility model is: a spiral conveying preheater, comprising a shell and at least two spiral shafts installed in the shell, a heating device is arranged inside each spiral shaft, spiral blades are fixedly arranged on the outside of each spiral shaft, the center lines of each spiral shaft are parallel to each other and are in the same plane, the two ends of each spiral shaft are rotatably installed on the opposite sides of the shell, the shell is provided with a feed port and a discharge port, the blanking area of the feed port is located at the feed end of each spiral blade, and the discharge end of each spiral blade corresponds to the discharge port; the shell is not provided with a spiral shaft and a distribution plate is arranged between the opposite sides, the distribution plate is located above each spiral shaft and behind the blanking area corresponding to the feed port, and a gap of the same width is reserved between the bottom edge of the distribution plate and each spiral blade.
[0008] The distribution plate is used to control the coating thickness of each spiral blade. Furthermore, the bottom edge of the distribution plate is a straight edge and parallel to the plane corresponding to the center line of each spiral shaft; or, the bottom edge of the distribution plate is continuously provided with arc notches and adapted to the shape of the cylinder corresponding to each spiral blade.
[0009] In order to avoid uneven accumulation of materials between the feed port and the distribution plate, further: the projection of the bottom edge of the distribution plate on the plane corresponding to the center line of each screw shaft is perpendicular to the center line of any screw shaft.
[0010] Furthermore: the plane corresponding to the cloth plate is vertical, and the cloth plate is located at the edge of the blanking area of the feed port; or, the upper end of the cloth plate is inclined toward the side away from the feed port, the upper part of the cloth plate is located outside the blanking area of the feed port, and the lower part of the cloth plate is located in the blanking area of the feed port.
[0011] Furthermore, the top edge of the cloth plate is connected to the top plate of the shell; or, the top plate of the shell is horizontal, and the top edge of the cloth plate is horizontal with a gap reserved between the top plate of the shell.
[0012] In order to improve the conveying and preheating capacity of the screw conveyor preheater, further: at least three screw shafts are arranged in the shell, and the lengths of the screw shafts are equal and arranged at equal intervals. For example, four screw shafts are arranged in the shell.
[0013] In order to improve the strength of the cloth plate and extend the service life of the cloth plate, specifically: the cloth plate is a wear-resistant steel plate.
[0014] Furthermore, the distance between the bottom edge of the cloth plate and each spiral blade can be adjusted. In order to avoid the cloth plate and the spiral blade from scratching, further, the distance between the bottom edge of the cloth plate and each spiral blade is at least 1 cm.
[0015] Specifically: U-shaped slots are fixedly arranged on opposite sides of the shell, the two sides of the cloth plate are placed in the U-shaped slots, and adjustment bolts for adjusting the position of the cloth plate in the U-shaped slots are arranged between the cloth plate and the U-shaped slots.
[0016] The beneficial effects of the utility model are as follows: the spiral conveyor preheater is used to heat and continuously discharge the material continuously entering the shell. The material falls to the feed end of each spiral blade through the feed port of the shell, and the distribution plate plays a role in controlling the coating thickness of each spiral blade, so that the material can be evenly distributed in the gaps between each spiral blade and the top of each spiral blade, preventing the material from accumulating on some spiral blades, thereby achieving uniform heating of the material. The distribution plate has a simple structure, can prevent material accumulation, and is safe and reliable. By adjusting the distance between the bottom edge of the distribution plate and the spiral blade, the material thickness of the upper part of each spiral blade can be adjusted, so that the spiral conveyor preheater can have a variety of material feed amount control methods, so that the spiral conveyor preheater can be used for preheating a variety of materials. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of a screw conveying preheating machine of the utility model.
[0018] Reference numerals: housing 1 , spiral shaft 2 , spiral blade 3 , feed inlet 4 , discharge outlet 5 , material distribution plate 6 , U-shaped slot 7 , adjusting bolt 8 . DETAILED DESCRIPTION
[0019] The utility model will be further described below in conjunction with the accompanying drawings.
[0020] like Figure 1As shown, the screw conveying preheater of the utility model comprises a shell 1 and at least two screw shafts 2 installed in the shell 1. The outer side of each screw shaft 2 is fixedly provided with a spiral blade 3, and the spiral blade 3 is generally welded and fixed to the outer side of the screw shaft 2. The center lines of each screw shaft 2 are parallel to each other and are in the same plane. When the number of the screw shafts 2 in the shell 1 is three or more, each screw shaft 2 is arranged at equal intervals. The inner cavity of the shell 1 is generally in the shape of a rectangular parallelepiped, and each screw shaft 2 is the same. The two ends of each screw shaft 2 are rotatably installed on the opposite sides of the shell 1, and the two sides of the shell 1 where the screw shaft 2 is installed are parallel to each other. In order to improve the conveying and preheating capacity of the screw conveying preheater, at least three screw shafts 2 are generally arranged in the shell 1, and each screw shaft 2 is equal in length and arranged at equal intervals. For example, four screw shafts 2 are arranged in the shell 1. A heating device is arranged inside each screw shaft 2, and the heating device heats the screw shaft 2 and the spiral blade 3. The screw shaft 2 and the spiral blade 3 stir and convey the material, and heat the material at the same time. The housing 1 is provided with a feed port 4 and a discharge port 5. The drop zone of the feed port 4 is located at the feed end of each spiral blade 3, and the discharge end of each spiral blade 3 corresponds to the discharge port 5. The feed port 4 is preferably provided on the top plate of the housing 1, and the discharge port 5 is preferably provided on the bottom plate of the housing 1. The material enters the housing 1 through the feed port 4, falls on the feed end of the spiral blade 3, is transferred from the spiral blade 3 to the discharge port 5, and then is discharged from the housing 1 from the discharge port 5.
[0021] The housing 1 is not equipped with a spiral shaft 2 and a distribution plate 6 is arranged between the two opposite sides. The distribution plate 6 is used to control the coating thickness of each spiral blade 3. The distribution plate 6 is located above each spiral shaft 2 and behind the blanking area corresponding to the feed port 4. A gap of the same width is reserved between the bottom edge of the distribution plate 6 and each spiral blade 3. The plane corresponding to the center line of each spiral shaft 2 is generally a horizontal plane, or a plane slightly inclined toward the discharge port 5. Therefore, the width of the gap refers to the vertical dimension of the gap, or the dimension on the plane perpendicular to the plane corresponding to the center line of the spiral shaft 2. The bottom edge of the distribution plate 6 can be a straight edge and parallel to the plane corresponding to the center line of each spiral shaft 2; or, the bottom edge of the distribution plate 6 is continuously provided with arc-shaped notches and adapted to the shape of the cylinder corresponding to each spiral blade 3. In this case, the distribution plate 6 can form a material layer with a continuous arched surface at the feed end of the spiral blade 3. In order to prevent uneven accumulation of materials between the feed port 4 and the distribution plate 6, the projection of the bottom edge of the distribution plate 6 on the plane corresponding to the center line of each screw shaft 2 is perpendicular to the center line of any screw shaft 2. In order to improve the strength of the distribution plate 6 and extend the service life of the distribution plate 6, the distribution plate 6 is made of wear-resistant material, for example, the distribution plate 6 is a wear-resistant steel plate; or, a wear-resistant layer is provided on the side of the distribution plate 6 close to the feed port 4.
[0022] The plane corresponding to the distribution plate 6 can be arranged vertically, and the distribution plate 6 is located at the edge of the blanking area of the feed port 4, that is, the distribution plate 6 directly forms a boundary of the blanking area of the feed port 4; or refer to Figure 1 , the upper end of the cloth plate 6 is inclined toward the side away from the feed port 4, so that the feed port 4 is open, the upper part of the cloth plate 6 is located outside the blanking area of the feed port 4, and the lower part of the cloth plate 6 is located in the blanking area of the feed port 4. The top edge of the cloth plate 6 can be connected to the top plate of the shell 1, and the material in the blanking area of the feed port 4 cannot pass over the cloth plate 6. Alternatively, the top plate of the shell 1 is horizontal, the top edge of the cloth plate 6 is horizontal and a gap is reserved between it and the top plate of the shell 1, and the material is allowed to pass over the cloth plate 6.
[0023] The cloth plate 6 can be fixedly mounted on the housing 1, or the distance between the bottom edge of the cloth plate 6 and each spiral blade 3 can be adjusted. In order to avoid the cloth plate 6 and the spiral blade 3 from scratching, the distance between the bottom edge of the cloth plate 6 and each spiral blade 3 is at least 1 cm. The cloth plate 6 can be directly fixedly mounted on the housing 1, or a position or structure for mounting the cloth plate 6 can be set inside the housing 1. For example, U-shaped slots 7 are fixedly arranged on opposite sides of the housing 1, respectively, and the U-shaped slots 7 can be welded to the housing 1. The U-shaped slots 7 are preferably made of wear-resistant materials, and the width of the U-shaped slots 7 is adapted to the thickness of the cloth plate 6, and the two sides of the cloth plate 6 are placed in the U-shaped slots 7. In order to adjust the distance between the bottom edge of the cloth plate 6 and each spiral blade 3, an adjusting bolt 8 for adjusting the position of the cloth plate 6 in the U-shaped slot 7 is set between the cloth plate 6 and the U-shaped slot 7. For example, a connecting piece is welded on the side of the distribution plate 6 facing away from the feed inlet 4, the adjusting bolt 8 is passed through a nut and is rotatably connected to the connecting piece, the nut is welded to the distribution plate 6, and the adjusting nut 8 is rotated to adjust the distance between the distribution plate 6 and each spiral blade 3 within a certain range.
Claims
1. A screw conveyor preheater, comprising a shell (1) and at least two screw shafts (2) installed in the shell (1), a heating device is arranged inside each screw shaft (2), a screw blade (3) is fixedly arranged on the outer side of each screw shaft (2), the center lines of each screw shaft (2) are parallel to each other and are located in the same plane, the two ends of each screw shaft (2) are rotatably installed on opposite sides of the shell (1), the shell (1) is provided with a feed port (4) and a discharge port (5), the feed port (4) has a drop zone located at the feed end of each screw blade (3), and the discharge end of each screw blade (3) corresponds to the discharge port (5); characterized in that: The housing (1) is not equipped with a spiral shaft (2) and a distribution plate (6) is arranged between two opposite sides. The distribution plate (6) is located above each spiral shaft (2) and at the rear side of the blanking area corresponding to the feed port (4). A gap of the same width is reserved between the bottom edge of the distribution plate (6) and each spiral blade (3).
2. The screw conveyor preheater according to claim 1, characterized in that: The bottom edge of the distribution plate (6) is a straight edge and is parallel to the plane corresponding to the center line of each spiral shaft (2); or, the bottom edge of the distribution plate (6) is continuously provided with arc-shaped notches and is adapted to the shape of the cylinder corresponding to each spiral blade (3).
3. The screw conveyor preheater according to claim 1, characterized in that: The projection of the bottom edge of the distribution plate (6) on the plane corresponding to the center line of each spiral shaft (2) is perpendicular to the center line of any spiral shaft (2).
4. The screw conveyor preheater according to claim 1, characterized in that: The plane corresponding to the distribution plate (6) is vertical, and the distribution plate (6) is located at the edge of the blanking area of the feed port (4); or, the upper end of the distribution plate (6) is inclined toward a side away from the feed port (4), the upper part of the distribution plate (6) is located outside the blanking area of the feed port (4), and the lower part of the distribution plate (6) is located in the blanking area of the feed port (4).
5. The screw conveyor preheater according to claim 1, characterized in that: The top edge of the distribution plate (6) is connected to the top plate of the shell (1); or, the top plate of the shell (1) is horizontal, and the top edge of the distribution plate (6) is horizontal and a gap is reserved between the top plate of the shell (1).
6. The screw conveyor preheater according to any one of claims 1 to 5, characterized in that: At least three spiral shafts (2) are arranged in the shell (1), and the spiral shafts (2) are of equal length and are arranged at equal intervals.
7. The screw conveyor preheater according to any one of claims 1 to 5, characterized in that: The material distribution plate (6) is a wear-resistant steel plate.
8. The screw conveyor preheater according to any one of claims 1 to 5, characterized in that: The distance between the bottom edge of the distribution plate (6) and each spiral blade (3) can be adjusted.
9. The screw conveyor preheater according to claim 8, characterized in that: The distance between the bottom edge of the distribution plate (6) and each spiral blade (3) is at least 1 cm.
10. The screw conveyor preheater according to claim 8, characterized in that: U-shaped slots (7) are fixedly arranged on opposite sides of the housing (1), and the two sides of the material distribution plate (6) are placed in the U-shaped slots (7). Adjustment bolts (8) for adjusting the position of the material distribution plate (6) in the U-shaped slots (7) are arranged between the material distribution plate (6) and the U-shaped slots (7).