Flowability adjusting mechanism of plasma cladding powder feeder

Abstract

The utility model provides a fluidity adjusting mechanism of a plasma cladding powder feeder, and belongs to the technical field of plasma cladding. The fluidity adjusting mechanism of the plasma cladding powder feeder comprises a powder feeding barrel, the outer wall of the powder feeding barrel is in flange connection with a powder heating barrel, a cover plate is arranged at the top end of the powder feeding barrel, a locking mechanism is welded to the top end of the powder feeding barrel, the cover plate is fixedly connected with the top end of the powder feeding barrel through the locking mechanism, and a feeding mechanism is arranged in the powder feeding barrel. The fixed end of the feeding mechanism is fixed to the surface of the cover plate through bolts. Through the design of the locking mechanism and the feeding mechanism, connection between the cover plate and the powder feeding barrel is firm, and disassembly is easy. The cover plate can be opened through simple operation, a user can conveniently and thoroughly clean and maintain the interior of the powder feeding barrel and the feeding mechanism, and meanwhile it is ensured that powder is continuously and evenly conveyed in the powder feeding barrel.

Description

Technical Field

[0001] This application relates to the technical field of plasma cladding, and more specifically, to a fluidity adjustment mechanism for a powder feeder in plasma cladding. Background Art

[0002] In the high-precision and advanced metallurgical process of plasma cladding, the performance of the powder feeder is undoubtedly a key factor determining the quality of the cladding layer and the final performance of the workpiece. The plasma cladding process, with its unique characteristics of rapid heating and cooling far from the equilibrium state, poses special challenges to the design of the powder feeder. Especially when dealing with light or fine-grained alloy powders, the fluidity of the powder has become the core issue affecting the powder feeding efficiency and cladding uniformity.

[0003] Currently, for the traditional fluidity adjustment mechanism of a plasma cladding powder feeder, such as a fluidity adjustment mechanism for a plasma cladding powder feeder with the publication number CN219772260U (China, the authorization announcement date is September 29, 2023), in the above solution, it includes a powder feeder barrel, and also includes: a storage barrel fixedly connected to the outer wall of the powder feeder barrel, wherein a storage bin communicating with the powder feeder barrel is provided in the storage barrel, a stirring rod is rotatably connected in the storage bin, multiple groups of stirring blades are fixedly connected to the stirring rod, and a motor two for driving the stirring rod to rotate is fixedly connected to the top of the storage barrel; a heating cavity is provided in the storage barrel, and a heating pipe for heating and drying the powder material is fixedly connected in the heating cavity; in the present utility model, the stirring rod is rotatably connected in the storage barrel to stir the material, which can improve the fluidity of the material in the storage barrel, and can also heat the material, contributing to improving the drying effect, reducing the water content in the powder, thereby reducing its adhesiveness and improving the fluidity. However, it is not difficult to find after in-depth practice that the above solution also faces challenges during long-term service: it is difficult for users to clean the powder residues accumulated on key components such as the stirring mechanism and the powder feeder barrel. If not cleaned and maintained regularly and meticulously, the powder residues in the above equipment may cause equipment failures, affecting the smoothness of powder feeding and further damaging the cladding quality. Summary of the Utility Model

[0004] To make up for the above deficiencies, this application provides a fluidity adjustment mechanism for a plasma cladding powder feeder to solve the problems raised in the above background art.

[0005] To achieve the above object, the technical solution adopted by the present utility model to solve its technical problems is as follows:

[0006] A fluidity adjustment mechanism for a plasma cladding powder feeder, comprising a powder feeding cylinder, a powder heating cylinder is flange-connected to the outer wall of the powder feeding cylinder, a cover plate is provided at the top of the powder feeding cylinder, and a locking mechanism is welded. The cover plate is fixedly connected to the top of the powder feeding cylinder through the locking mechanism. A feeding mechanism is arranged inside the powder feeding cylinder, and the fixed end of the feeding mechanism is bolted to the surface of the cover plate.

[0007] Further, the locking mechanism includes four insertion holes, four insertion posts, four slot rings and four clamping blocks. Four of the insertion holes are equidistantly arranged on the edge of the surface of the cover plate. The bottoms of the four insertion posts are respectively and seamlessly welded to the top of the powder feeding cylinder at equal intervals, and four of the slot rings are respectively arranged on the outer walls and are respectively inserted into the four insertion holes. The inner walls of the four clamping blocks are respectively fixedly connected to the inside of the four slot rings, and the bottoms are closely attached to the surface of the cover plate, and the surfaces are attached to the inner tops of the slot rings.

[0008] Further, the feeding mechanism includes a driving motor, a bearing, a coupling, a main spiral feeding rod and a secondary spiral feeding rod. The bearing is embedded in the surface of the cover plate. The fixed end of the driving motor is bolted to the surface of the cover plate, and the output end vertically extends through the inner ring of the bearing. The two ends of the coupling are respectively locked and connected to the output end of the driving motor and the top of the main spiral feeding rod. The main spiral feeding rod and the opposite end of the secondary spiral feeding rod are integrally formed, and the outer wall is attached to the inner wall of the powder feeding cylinder.

[0009] Further, the bottom end of the powder feeding cylinder is conical and is provided with a blanking valve.

[0010] Further, the powder heating cylinder includes a connecting pipe, a powder barrel and a heater. One end of the connecting pipe is welded to the outer wall of the powder feeding cylinder and is internally interconnected. The bottom end of the powder barrel is flange-connected to the other end of the connecting pipe. The heater is installed at the top of the powder barrel, and the heating end extends into the powder barrel.

[0011] Further, the heater includes a control head and an electric heating tube. The control head is fixedly connected to the top of the powder barrel and is electrically connected to the electric heating tube. The electric heating tube is inserted into the powder barrel.

[0012] The utility model has the following beneficial effects:

[0013] 1. Through the unique design of the locking mechanism of the utility model, the connection between the cover plate and the powder feeding cylinder is both firm and easy to disassemble. The cover plate can be opened through simple operations, which is convenient for users to thoroughly clean and maintain the inside of the powder feeding cylinder and the feeding mechanism, effectively reducing the influence of powder residue on the performance of the equipment and extending the service life of the equipment.

[0014] 2. Through the design of the feeding mechanism, the utility model adopts a driving motor to drive the main spiral feeding rod and the secondary spiral feeding rod to work together, and the outer walls of the main spiral feeding rod and the secondary spiral feeding rod are attached to the inner wall of the powder feeding cylinder, ensuring the continuous and uniform transportation of the powder in the powder feeding cylinder. This design effectively improves the accuracy and stability of powder feeding, and provides a reliable powder supply for the plasma cladding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of the fluidity adjustment mechanism of the plasma cladding powder feeder provided by the embodiment of the present application;

[0017] Figure 2 It is a schematic internal structure diagram of the powder feeding cylinder provided by the embodiment of the present application;

[0018] Figure 3 It is a schematic diagram of the feeding mechanism provided by the embodiment of the present application;

[0019] Figure 4 It is a schematic diagram of the cover plate provided by the embodiment of the present application;

[0020] Figure 5 It is a schematic structural diagram of the clamping block provided by the embodiment of the present application;

[0021] Figure 6 It is a schematic structural diagram of the plug-in column and the card slot ring provided by the embodiment of the present application;

[0022] Figure 7 It is a schematic structural diagram of the powder heating barrel provided by the embodiment of the present application.

[0023] In the figure: 1 - powder feeding cylinder; 2 - powder heating barrel; 3 - cover plate; 4 - locking mechanism; 5 - feeding mechanism; 6 - blanking valve; 41 - plug-in hole; 42 - plug-in column; 43 - card slot ring; 44 - clamping block; 51 - driving motor; 52 - bearing; 53 - coupling; 54 - main spiral feeding rod; 55 - secondary spiral feeding rod; 21 - connecting pipe; 22 - powder barrel; 23 - heater; 231 - control head; 232 - electric heating tube. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0025] Embodiment:

[0026] Please refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 7 A fluidity adjustment mechanism for a plasma cladding powder feeder, comprising a powder feeding cylinder 1, and a powder heating cylinder 2 is flange-connected to the outer wall of the powder feeding cylinder 1; the bottom end of the powder feeding cylinder 1 is conical and is provided with a blanking valve 6; the powder heating cylinder 2 includes a connecting pipe 21, a powder barrel 22 and a heater 23; the heater 23 includes a control head 231 and an electric heating tube 232.

[0027] Among them, the powder feeding cylinder 1 is made of high-quality metal material, has good corrosion resistance and high-temperature resistance, and its bottom end is designed to be conical. This conical design helps to form a natural guiding effect when the powder flows downward, reduces the accumulation and retention of the powder at the bottom, and thus improves the fluidity of the powder. At the same time, the conical design can also make the powder form a more compact flow beam at the outlet, which is beneficial to the uniform distribution of the powder.

[0028] Among them, the powder heating cylinder 2 realizes the functions of powder preheating and storage. The powder feeding cylinder 1 is made of high-quality metal material, and its outer wall is connected to the connecting pipe 21 of the powder heating cylinder 2 by welding. The inside of the connecting pipe 21 is interconnected with the powder feeding cylinder 1 and the powder barrel 22 to form a powder conveying channel. This design ensures that the powder can smoothly enter the powder feeding cylinder 1 for conveying after preheating. The powder barrel 22 is used as a powder storage container, and its bottom end is connected to the other end of the connecting pipe 21 by a flange to ensure tightness and stability; and it has a feeding port on its outer wall for conveniently adding powder to the powder barrel 22. The heater 23 is installed at the top of the powder barrel 22, and its heating end extends into the powder barrel 22 through the hole design on the top of the powder barrel 22 to uniformly heat the powder. The heater 23 includes a control head 231 and an electric heating tube 232. The control head 231 is fixedly connected to the top of the powder barrel 22, which not only plays a supporting role but also is responsible for the power supply and control of the electric heating tube 232. The electric heating tube 232 is made of high-efficiency material, has good heat conductivity and corrosion resistance. It is inserted into the powder barrel 22 and heats the powder by radiation and convection to ensure that the powder reaches the ideal preheating temperature before conveying.

[0029] Among them, the blanking valve 6 is installed at the conical bottom end of the powder feeding cylinder 1 and serves as a key component for controlling powder blanking. The blanking valve 6 adopts a high-precision adjustment mechanism, which can accurately control the powder flow rate and speed. By adjusting the opening degree of the blanking valve 6, the user can adjust the powder supply according to actual needs to ensure stable and accurate powder supply during the cladding process.

[0030] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 , a fluidity adjustment mechanism for a plasma cladding powder feeder. A cover plate 3 is provided at the top end of the powder feeding cylinder 1, and a locking mechanism 4 is welded. The cover plate 3 is fixedly connected to the top end of the powder feeding cylinder 1 through the locking mechanism 4. A feeding mechanism 5 is provided inside the powder feeding cylinder 1, and the fixed end of the feeding mechanism 5 is bolted to the surface of the cover plate 3. The locking mechanism 4 includes four insertion holes 41, four insertion posts 42, four clamping groove rings 43, and four clamping blocks 44; the feeding mechanism 5 includes a driving motor 51, a bearing 52, a coupling 53, a main spiral feeding rod 54, and a secondary spiral feeding rod 55.

[0031] Among them, at the top end of the powder feeding cylinder 1, a detachable cover plate 3 is designed. This cover plate 3 also serves as a stable installation platform for the feeding mechanism 5, providing a solid support foundation for the internal powder feeding mechanism and ensuring the smoothness and efficiency of the powder feeding process.

[0032] Among them, the locking mechanism 4 is designed to provide a stable connection between the cover plate 3 and the powder feeding tube 1. Four plug-in holes 41 are evenly spaced on the surface edge of the cover plate 3. The size and position of these holes are precisely calculated to ensure a close fit with the plug-in column 42. The bottom ends of the four plug-in columns 42 are seamlessly welded to the top of the powder feeding tube 1 to form a solid support structure. The outer wall of the plug-in column 42 is smooth and precisely sized, which is convenient for smooth plugging with the plug-in hole 41. Four slot rings 43 are respectively provided on the outer walls of the four plug-in columns 42. The design of these slot rings 43 provides a reliable point of force for subsequent locking. The internal structure of the slot ring 43 is optimized to ensure a tight clamping with the clamping block 44. The inner walls of the four clamping blocks 44 are respectively connected to the inner clamping of the four slot rings 43. The clamping block 44 is made of high-strength material and has excellent wear resistance and corrosion resistance. Its bottom is in close contact with the surface of the cover plate 3, and the surface is in close contact with the inner top of the slot ring 43, thereby achieving a firm lock between the cover plate 3 and the powder delivery tube 1. During the installation process, first align the cover plate 3 with the top of the powder delivery tube 1 so that the plug hole 41 is aligned with the plug column 42. Then, insert the plug column 42 into the plug hole 41 until the slot ring 43 is completely exposed. Next, insert the clamping blocks 44 into the slot ring 43 respectively, and use the elastic deformation force of the clamping blocks 44 to tightly clamp the inner wall with the slot ring 43. Finally, check whether all the clamping blocks 44 are fully in place to ensure that there is no looseness between the cover plate 3 and the powder delivery tube 1. This design makes the connection between the cover plate 3 and the powder delivery tube 1 both firm and easy to disassemble. The cover plate 3 can be opened by simple operation, which is convenient for users to thoroughly clean and maintain the inside of the powder delivery tube 1 and the feeding mechanism 5, effectively reducing the impact of powder residue on equipment performance and extending the service life of the equipment.

[0033] Among them, the design of the feeding mechanism 5 ensures that the powder can enter the cladding area continuously and evenly. The driving motor 51 is used as the power source of the feeding mechanism 5, and the driving motor 51 is fixed to the surface of the cover plate 3 by bolts. Its output end extends vertically through the inner ring of the bearing 52 to ensure the stability and directionality of the power transmission. The bearing 52 is embedded on the surface of the cover plate 3 to provide support and guidance for the output end of the driving motor 51. Its high precision and low friction characteristics help to reduce energy loss and vibration during power transmission. The coupling 53 serves as a bridge connecting the output end of the driving motor 51 and the top of the main spiral feeding rod 54, and ensures the synchronous rotation between the two through a locking connection. Its design takes into account the transmission efficiency and the stability of torque transmission. The main spiral feeding rod 54 and the secondary spiral feeding rod 55 are the core components of the feeding mechanism. The opposite ends of the two are integrally formed to form a continuous spiral structure. This design helps to reduce the retention and blockage of powder during transportation. At the same time, their outer walls are tightly fitted with the inner wall of the powder feeding barrel 1 to ensure that the powder can be smoothly pushed forward along the spiral trajectory.

[0034] The working principle of the fluidity adjustment mechanism of this plasma cladding powder feeder: During the working process, first, the supply amount of powder at the discharge port of the powder feeding cylinder 1 is adjusted through the blanking valve 6; meanwhile, the heater 23 ensures that the powder in the powder barrel 22 is in a dry state. The driving motor 51 is started and drives the coupling 53 to rotate. The coupling 53 then transmits the rotational power to the main spiral feeding rod 54. As the main spiral feeding rod 54 rotates, the spiral blades thereon convey the powder from inside the powder feeding cylinder 1 outwards. At the same time, the secondary spiral feeding rod 55 also rotates accordingly, further pushing the powder forward. This double-spiral feeding structure is not only more suitable for the inside of the powder feeding cylinder 1, but also ensures the uniformity and stability of the powder during the conveying process.

[0035] It should be noted that the specific model specifications of the coupling 53, the heater 23, and the driving motor 51 need to be selected and determined according to the actual specifications of this device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0036] The power supply and its principle of the heater 23 and the driving motor 51 are clear to those skilled in the art, and will not be elaborated here.

[0037] For those skilled in the art, it is obvious that this application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of this application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of this application is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in this application. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A flowability adjustment mechanism for a plasma cladding powder feeder, comprising a powder feeding tube (1), wherein the outer wall flange of the powder feeding tube (1) is connected to a powder heating barrel (2), characterized in that: The top of the powder feeding cylinder (1) is provided with a cover plate (3) and is welded with a locking mechanism (4); the cover plate (3) is fixedly connected to the top of the powder feeding cylinder (1) via the locking mechanism (4); a feeding mechanism (5) is provided inside the powder feeding cylinder (1); a fixed end of the feeding mechanism (5) is bolted to the surface of the cover plate (3).

2. The plasma cladding powder feeder fluidity adjustment mechanism according to claim 1, characterized in that: The locking mechanism (4) comprises four plug-in holes (41), four plug-in columns (42), four slot rings (43) and four fixing blocks (44); the edge of the surface of the cover plate (3) is provided with four plug-in holes (41) at equal intervals; the bottom ends of the four plug-in columns (42) are seamlessly welded to the top of the powder feeding tube (1) at equal intervals; the outer walls are provided with four slot rings (43) respectively, which are respectively plugged into the inside of the four plug-in holes (41); the inner walls of the four fixing blocks (44) are respectively fixedly connected to the inside of the four slot rings (43); the bottoms are tightly fitted to the surface of the cover plate (3), and the surfaces are fitted to the top of the inner part of the slot rings (43).

3. The plasma cladding powder feeder fluidity adjustment mechanism according to claim 2, characterized in that: The feeding mechanism (5) comprises a driving motor (51), a bearing (52), a coupling (53), a main spiral feeding rod (54) and a secondary spiral feeding rod (55); the bearing (52) is embedded in the surface of the cover plate (3); the fixed end of the driving motor (51) is bolted to the surface of the cover plate (3), and the output end extends vertically through the inner ring of the bearing (52); the two ends of the coupling (53) are respectively locked and connected to the output end of the driving motor (51) and the top end of the main spiral feeding rod (54); the opposite ends of the main spiral feeding rod (54) and the secondary spiral feeding rod (55) are integrally formed, and the outer wall is in contact with the inner wall of the powder feeding cylinder (1).

4. The plasma cladding powder feeder fluidity adjustment mechanism according to claim 3, characterized in that: The bottom end of the powder delivery cylinder (1) is configured to be conical and is provided with a discharge valve (6).

5. The plasma cladding powder feeder fluidity adjustment mechanism according to claim 4, characterized in that: The powder heating barrel (2) comprises a connecting pipe (21), a powder barrel (22) and a heater (23); one end of the connecting pipe (21) is welded to the outer wall of the powder feeding barrel (1), and the interiors thereof are interconnected; the bottom end of the powder barrel (22) is flange-connected to the other end of the connecting pipe (21); the heater (23) is mounted on the top end of the powder barrel (22), and the heating end extends into the interior of the powder barrel (22).

6. The plasma cladding powder feeder fluidity regulating mechanism according to claim 5, characterized in that: The heater (23) comprises a control head (231) and an electric heating tube (232); the control head (231) is fixedly connected to the top of the powder barrel (22) and is electrically connected to the electric heating tube (232); the electric heating tube (232) is inserted into the interior of the powder barrel (22).

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