Automatic powder feeding device for flux-cored wire production

Abstract

The utility model discloses an automatic powder feeding device for flux-cored wire production relates to flux-cored wire production technical field, this automatic powder feeding device for flux-cored wire production, including powder bin and powder feeding mouth, the powder bin is double -sided wall structure, including the outer shell and inner layer material cavity, and the sealed interlayer is formed between the outer shell and inner layer material cavity, and the interlayer is filled with desiccant granule, and the desiccant granule is the color change silica gel, fills in detachable mesh filter bag, and the powder feeding mouth is set up in the powder bin top, and the powder bin bottom intercommunication powder outlet pipe. The utility model discloses through double -sided wall dry interlayer, sealing cover, humidity monitoring alarm, rotation arch breaking, pipe wall knock and central shaft nitrogen gas etc. Multiple synergistic structure, has built the powder stable conveying system of the collection moistureproof, arch breaking, inert protection in one, effectively prevents the powder moisture absorption and agglomerates, and improves the uniformity, stability and purity of powder feeding.

Description

Technical Field

[0001] This utility model relates to the field of flux-cored welding wire production technology, and in particular to an automatic powder feeding device for flux-cored welding wire production. Background Technology

[0002] In the production process of flux-cored welding wire, uniformly filling the U-shaped groove of the formed steel strip with a specific formula of flux powder is one of the key steps, and the filling quality directly affects the welding performance and yield of the welding wire.

[0003] However, existing powder feeding devices generally suffer from problems such as the powder being easily affected by moisture, clumping, and having poor flowability in practical applications. Because the powder contains active metal components such as aluminum powder and titanium powder, it is extremely easy to absorb moisture and oxidize when exposed to air, leading to powder agglomeration and reduced flowability. Consequently, bridging, blockage, and uneven filling occur during the feeding process, seriously affecting the powder feeding accuracy and the stability of welding wire quality.

[0004] Traditional solutions often employ simple sealing caps or localized drying measures, which have limited moisture-proof effects and lack effective means to break up clumps of powder. They also cannot inhibit oxidation reactions inside the powder. Furthermore, when powder adheres to the powder outlet tube wall due to moisture, conventional structures are difficult to clean effectively, easily causing persistent blockages. Utility Model Content

[0005] This utility model provides an automatic powder feeding device for flux-cored welding wire production, including a powder silo and a powder feeding port. The powder silo has a double-wall structure, including an outer shell and an inner material cavity. A sealed interlayer is formed between the outer shell and the inner material cavity. The interlayer is filled with desiccant particles, which are color-changing silica gel, and are filled in a detachable mesh filter bag. The powder feeding port is located at the top of the powder silo, and the bottom of the powder silo is connected to a powder outlet pipe.

[0006] Preferably, the powder inlet is provided with an openable cover plate, and the edge of the cover plate is provided with a rubber sealing ring to prevent external humid air from entering the powder hopper.

[0007] Preferably, the inner material cavity is provided with a rotating arch-breaking mechanism. The rotating arch-breaking mechanism includes a vertically arranged central shaft that extends from the upper end of the powder silo inward. The lower end of the central shaft is fixedly connected to a rotating rod, on which multiple layers of arch-breaking rods are installed. The arch-breaking rods are radially distributed and their length gradually decreases from top to bottom, forming a conical disturbance zone.

[0008] Preferably, a driven wheel is connected to the upper end of the central shaft, and a driving wheel is rotatably arranged on the top of the powder hopper. The driving wheel and the driven wheel mesh, and the rotating shaft of the driving wheel is connected to the output shaft of the drive motor.

[0009] Preferably, the central shaft is a hollow structure, with a plurality of air outlet pipes provided on the protruding part at the lower end of the central shaft, and an inert gas filling pipe connected to the upper end of the central shaft.

[0010] Preferably, a humidity sensor is provided on the upper side inside the interlayer, and the humidity sensor signal is connected to an alarm module. When the humidity inside the interlayer is too high, an alarm is triggered to remind the user to replace the desiccant granules.

[0011] Preferably, the outer shell of the powder silo is provided with an observation window, which is equipped with a transparent observation plate and a sealing buckle.

[0012] Preferably, a vertical rail is fixedly provided on one side of the powder outlet tube, a horizontal rail is slidably provided inside the vertical rail, a slider is slidably provided inside the horizontal rail, and a striking head is fixedly provided on the slider. The striking head is used to intermittently strike the powder outlet tube.

[0013] Preferably, a reciprocating screw one is rotatably installed inside the vertical rail, and the reciprocating screw one is threadedly connected to one side of the horizontal rail. The reciprocating screw one is driven by a motor. A reciprocating screw two is rotatably installed inside the horizontal rail, and the reciprocating screw two is threadedly connected to the slider. The reciprocating screw two is driven by a motor.

[0014] Preferably, the outlet of the powder outlet pipe is connected to a flexible guide pipe, the end of which leads to the filling groove of the flux-cored wire forming mold, and the outer layer of the flexible guide pipe is wrapped with an insulation layer.

[0015] This utility model provides an automatic powder feeding device for flux-cored welding wire production, which, compared with the prior art:

[0016] 1. This utility model features a double-walled powder silo structure, forming a sealed interlayer filled with color-changing silica gel desiccant particles between the outer shell and the inner material cavity. Combined with a rubber sealing ring at the powder inlet and an openable cover, multiple moisture barriers are constructed. The desiccant particles continuously absorb moisture from external penetration or brought in by materials, effectively reducing the humidity inside the silo and preventing the powder from agglomerating or clumping due to moisture absorption. At the same time, a humidity sensor installed in the interlayer can monitor the working status of the desiccant in real time, automatically alarming and prompting replacement when the humidity is too high, ensuring the continuous effectiveness of the moisture-proof function.

[0017] 2. Based on moisture prevention, this utility model further integrates a rotating arch-breaking mechanism and a pipe wall striking mechanism, effectively solving the problems of poor powder flowability and easy bridging and blockage in humid environments. The central shaft drives multiple layers of radial arch-breaking rods to form a conical disturbance zone in the hopper, continuously breaking up agglomerated powder and preventing the formation of stable arch bridges. At the same time, the reciprocating screw drives the striking head to move on a two-dimensional sliding structure composed of vertical and horizontal rails, periodically striking the outer wall of the powder pipe to eliminate powder sticking and blockage. Furthermore, the central shaft adopts a hollow structure and is connected to an inert gas filling pipe, which can introduce nitrogen into the powder hopper during the powder filling process to form an inert atmosphere protection, inhibit powder oxidation and help drive away residual moisture, improving the uniformity, stability and purity of powder delivery, and fundamentally ensuring the consistency and reliability of the filling quality of the flux-cored welding wire. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of the material distribution bin structure according to an embodiment of the present utility model;

[0021] Figure 3 This is an embodiment of the present utility model. Figure 2 A schematic diagram of the structure at point A;

[0022] Figure 4 This is a partial schematic diagram of the powder silo structure according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the powder outlet pipe and other components according to an embodiment of the present utility model;

[0024] Figure 6 This is a top view of the sandwich structure and other structures according to an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the arch-breaking rod and other structures in an embodiment of this utility model;

[0026] Figure 8 This is a top view schematic diagram of the flexible material guide tube structure according to an embodiment of the present utility model.

[0027] Figure label:

[0028] 1. Powder hopper; 2. Powder inlet; 3. Cover plate; 4. Rubber sealing ring; 5. Observation window; 6. Interlayer; 7. Humidity sensor; 8. Rotating rod; 9. Arch-breaking rod; 10. Central shaft; 11. Air outlet pipe; 12. Driven wheel; 13. Driving wheel; 14. Powder outlet pipe; 15. Vertical rail; 16. Reciprocating screw one; 17. Horizontal rail; 18. Reciprocating screw two; 19. Slider; 20. Knocking head; 21. Flexible feed tube; 22. Insulation layer; 23. Desiccant granules. Detailed Implementation

[0029] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Please refer to Figures 1-8 This utility model provides an automatic powder feeding device for flux-cored welding wire production, including a powder hopper 1 and a powder feeding port 2. The powder hopper 1 is a vertically arranged container used to store the flux powder to be filled.

[0031] The powder silo 1 adopts a double-wall structure, including an outer shell and an inner material cavity. An annular sealed interlayer 6 is formed between the outer shell and the inner material cavity. The interlayer 6 is filled with desiccant particles 23. The desiccant particles 23 are preferably color-changing silica gel, which has a clear color indication function, such as turning from blue to pink after absorbing moisture, making it easy to judge the failure status. The desiccant particles 23 are encapsulated in a removable mesh filter bag. The filter bag is made of a corrosion-resistant and moisture-permeable material, which is easy to remove for drying or replacement periodically.

[0032] To monitor the humidity environment inside the mezzanine 6 in real time, a humidity sensor 7 is installed on the upper side inside the mezzanine 6. The humidity sensor 7 is connected to an external alarm module via a wire signal. The alarm module can be an audible and visual alarm or a PLC display screen. When the humidity inside the mezzanine 6 exceeds the preset threshold, the alarm module will automatically issue a prompt to remind the operator to replace the desiccant in time to ensure that the moisture-proof function remains effective.

[0033] The top of the powder silo 1 is equipped with a powder inlet 2 for adding powder into the silo. The powder inlet 2 is equipped with an openable cover 3. The edge of the cover 3 is inlaid with a rubber sealing ring 4. When the cover 3 is closed, the rubber sealing ring 4 fits tightly with the top edge of the powder silo 1 to form an airtight seal, effectively preventing external humid air from entering the inner material cavity and further improving the overall moisture-proof performance.

[0034] like Figure 2 and Figure 7As shown, to prevent the powder from accumulating and forming "arch bridges" that block the discharge port in the silo, a rotating arch-breaking mechanism is installed in the inner material cavity. The rotating arch-breaking mechanism includes a vertically set central shaft 10. The upper end of the central shaft 10 passes through the bearing seat at the top of the powder silo 1 and extends to the outside. The lower end is fixedly connected to a rotating rod 8 in the silo. Multiple layers of radially distributed arch-breaking rods 9 are installed on the rotating rod 8. The length of each layer of arch-breaking rods 9 gradually decreases from top to bottom, forming a conical disturbance zone. This effectively disturbs the powder at different heights and breaks up the clumps and arch bridge structures formed by moisture absorption or static electricity.

[0035] A driven wheel 12 is fixedly connected to the upper end of the central shaft 10. A driving wheel 13 that meshes with it is provided on the outer side of the top of the powder silo 1. The rotating shaft of the driving wheel 13 is connected to the output shaft of the external drive motor. When the drive motor starts, the central shaft 10 and the arch-breaking rod 9 are driven to rotate through the transmission between the driving wheel 13 and the driven wheel 12, so as to realize continuous arch-breaking operation.

[0036] Furthermore, to prevent powder oxidation and help suppress moisture, the central shaft 10 adopts a hollow structure. Its upper end is connected to an external inert gas filling pipe through a rotary joint, which can be filled with nitrogen. The lower end of the central shaft 10 is provided with several air outlet pipes 11. When the inert gas enters the hollow central shaft 10 through the filling pipe, it is released into the powder hopper 1 through the air outlet pipes 11, forming a gas barrier, driving out the air in the hopper, reducing the oxygen content, and at the same time helping to disturb the powder and prevent local moisture accumulation.

[0037] like Figure 4 As shown, in order to facilitate observation of the internal condition of the powder silo 1, an observation window 5 is provided on the outer shell of the powder silo 1. The observation window 5 is made of transparent pressure-resistant material and is equipped with a sealing buckle to ensure that the airtightness of the interlayer 6 is maintained while observing.

[0038] like Figure 5 As shown, the bottom of the powder silo 1 is connected to the powder outlet pipe 14. After the powder is broken up, it is output through the powder outlet pipe 14. In order to prevent the powder from sticking to the wall or blocking the powder outlet pipe 14, a vertical rail 15 is provided on one side of the powder outlet pipe 14. A horizontal rail 17 is slidably arranged in the vertical rail 15. A reciprocating screw 16 is rotatably arranged in the vertical rail 15. The reciprocating screw 16 is threaded to one side of the horizontal rail 17 and is driven by an independent motor to realize the reciprocating motion of the horizontal rail 17 in the vertical direction.

[0039] A slider 19 is slidably installed inside the horizontal rail 17, and a striking head 20 is fixed on the slider 19. A reciprocating screw 18 is rotatably installed inside the horizontal rail 17. The reciprocating screw 18 is threadedly connected to the slider 19 and driven by another motor to realize the reciprocating motion of the striking head 20 in the horizontal direction. Through the coordinated control of the reciprocating screw 16 and the reciprocating screw 18, the striking head 20 can move in a two-dimensional plane and periodically strike the outer wall of the powder outlet tube 14, effectively eliminating the adhesion and blockage of the medicine powder.

[0040] The outlet of the powder outlet pipe 14 is connected to a flexible guide pipe 21. The end of the flexible guide pipe 21 is aligned with the filling groove of the flux-cored welding wire forming mold, so that the powder can smoothly enter the groove of the steel strip. In order to prevent condensation caused by temperature difference during the conveying process, the outer layer of the flexible guide pipe 21 is wrapped with a heat insulation layer 22 to maintain the stable temperature inside the pipe.

[0041] In summary, firstly, powder is added to the powder hopper 1 through the powder inlet 2, and the cover plate 3 is closed to achieve sealing. During the powder addition and storage process, the desiccant in the interlayer 6 continuously absorbs moisture, the humidity sensor 7 monitors the environment in real time, the drive motor is started to drive the arch-breaking rod 9 to rotate and disturb the powder, and at the same time, nitrogen gas is introduced into the central shaft 10 through the inert gas filling pipe and released from the bottom to form a protective atmosphere. During the process of the powder falling through the powder outlet pipe 14, the pipe wall is periodically tapped by the tapping head 20 to prevent blockage. The powder is then transported to the forming mold through the heat-insulated flexible guide pipe 21, completing the automatic powder addition.

[0042] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic powder feeding device for producing flux-cored welding wire, comprising a powder hopper (1) and a powder feeding port (2), characterized in that: The powder silo (1) has a double-wall structure, including an outer shell and an inner material cavity. A sealed interlayer (6) is formed between the outer shell and the inner material cavity. The interlayer (6) is filled with desiccant particles (23). The desiccant particles (23) are color-changing silica gel and are filled in a detachable mesh filter bag. The powder inlet (2) is located at the top of the powder silo (1), and the bottom of the powder silo (1) is connected to the powder outlet pipe (14).

2. The automatic powder feeding device for flux-cored welding wire production according to claim 1, characterized in that: The powder inlet (2) is provided with an openable cover plate (3), and the edge of the cover plate (3) is provided with a rubber sealing ring (4) to prevent external humid air from entering the powder silo (1).

3. The automatic powder feeding device for flux-cored welding wire production according to claim 2, characterized in that: The inner material cavity is equipped with a rotating arch-breaking mechanism. The rotating arch-breaking mechanism includes a vertically set central shaft (10). The central shaft (10) extends from the upper end of the powder silo (1) inward. The lower end of the central shaft (10) is fixedly connected to a rotating rod (8). Multiple layers of arch-breaking rods (9) are installed on the rotating rod (8). The arch-breaking rods (9) are radially distributed and their length gradually decreases from top to bottom, forming a conical disturbance zone.

4. The automatic powder feeding device for flux-cored welding wire production according to claim 3, characterized in that: The upper end of the central shaft (10) is connected to a driven wheel (12), and the top of the powder hopper (1) is rotatably provided with a driving wheel (13). The driving wheel (13) and the driven wheel (12) mesh with each other, and the shaft of the driving wheel (13) is connected to the output shaft of the drive motor.

5. The automatic powder feeding device for flux-cored welding wire production according to claim 4, characterized in that: The central shaft (10) is a hollow structure. Several air outlet pipes (11) are provided on the protruding part at the lower end of the central shaft (10), and an inert gas filling pipe is connected to the upper end of the central shaft (10).

6. The automatic powder feeding device for flux-cored welding wire production according to claim 1, characterized in that: A humidity sensor (7) is provided on the upper side inside the interlayer (6). The humidity sensor (7) is connected to an alarm module. When the humidity inside the interlayer (6) is too high, a prompt is issued to remind the user to replace the desiccant particles (23).

7. The automatic powder feeding device for flux-cored welding wire production according to claim 1, characterized in that: The outer shell of the powder silo (1) is provided with an observation window (5), which is equipped with a transparent observation plate and a sealing buckle.

8. The automatic powder feeding device for flux-cored welding wire production according to claim 1, characterized in that: A vertical rail (15) is fixedly installed on one side of the powder outlet pipe (14), a horizontal rail (17) is slidably installed inside the vertical rail (15), a slider (19) is slidably installed inside the horizontal rail (17), and a knocking head (20) is fixedly installed on the slider (19). The knocking head (20) is used to knock the powder outlet pipe (14) intermittently.

9. The automatic powder feeding device for flux-cored welding wire production according to claim 8, characterized in that: A reciprocating screw 1 (16) is rotatably installed inside the vertical rail (15). The reciprocating screw 1 (16) is threadedly connected to one side of the horizontal rail (17). The reciprocating screw 1 (16) is driven by a motor. A reciprocating screw 2 (18) is rotatably installed inside the horizontal rail (17). The reciprocating screw 2 (18) is threadedly connected to the slider (19). The reciprocating screw 2 (18) is driven by a motor.

10. The automatic powder feeding device for flux-cored welding wire production according to claim 9, characterized in that: The outlet of the powder outlet pipe (14) is connected to the flexible guide pipe (21), and the end of the flexible guide pipe (21) leads to the filling groove of the flux-cored wire forming mold. The flexible guide pipe (21) is wrapped with an insulation layer (22).

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