Feeding device with anti-clogging structure at the discharge port

Abstract

This utility model discloses a feeding device with an anti-clogging structure for the discharge port, including a mounting plate and a central feeding pipe fixed on the mounting plate. The central feeding pipe includes a first inner pipe and a first outer pipe sleeved outside the first inner pipe. The cavity between the first inner pipe and the first outer pipe forms a first circulating water cooling jacket. The bottom end of the first inner pipe is the discharge port of the first inner pipe. It also includes at least one side feeding pipe fixed on the mounting plate. The side feeding pipe passes through corresponding through holes on the first outer pipe and the first inner pipe and communicates with the inside of the first inner pipe to form an inclined pipe discharge port. Furthermore, it includes a clearing rod that slides within the first inner pipe and whose driving end extends upwards from the top of the first inner pipe. The axial travel of the bottom end of the clearing rod is not less than the distance between the top of the inclined pipe discharge port and the bottom end of the first inner pipe discharge port, and it can extend beyond the discharge port of the first inner pipe. This feeding device can maintain a good and continuous clearing effect within the feeding pipe and keep the discharge port unobstructed.

Description

Technical Field

[0001] This utility model relates to the field of feeding technology into high-temperature furnaces, specifically a feeding device with a structure to prevent the discharge port from clogging. Background Technology

[0002] In the preparation of metal powder, it is essential to add materials into high-temperature furnaces such as high-temperature evaporation furnaces, heaters, or crucibles. Generally, materials are added using a vertical feeding pipe.

[0003] However, during the actual feeding process, the temperature changes are quite complex. Sometimes, due to temperature reasons, metal powders such as nickel powder or copper powder adhere to the inner tube of the feeding pipe, clogging the inner tube or the inner tube outlet. Although some technicians have paid attention to the problem of feeding pipe blockage in existing technologies and have used vibration, spiral drilling and other methods to clear the blockage, the problem of blockage in high-temperature containers has not been completely solved.

[0004] The reasons for this are mainly twofold: First, the high temperature at the outlet of the feeding pipe affects the unblocking effect. Second, existing technologies only focus on unblocking the inside of the feeding pipe, neglecting the complexity of the working environment around the outlet: because the outlet of the feeding pipe is inside the high-temperature furnace, materials such as nickel powder or copper powder will splash, and the temperature changes are significant. Therefore, over time, the material will gradually adhere to the outer wall of the feeding pipe outlet, clogging the outlet. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a feeding device with a structure that prevents the discharge port from blocking, which can maintain a good unblocking effect in the feeding pipe and keep the discharge port unobstructed.

[0006] The technical solution of this utility model is to provide a feeding device with a structure to prevent the discharge port from being blocked, including a mounting plate and a central feeding pipe fixed on the mounting plate;

[0007] The central feeding pipe includes a first inner pipe and a first outer pipe sleeved outside the first inner pipe. The cavity between the first inner pipe and the first outer pipe forms a first circulating water cooling jacket. The bottom end of the first inner pipe is the discharge port of the first inner pipe.

[0008] The present invention provides a feeding device with an anti-clogging structure for the discharge port, and further includes at least one side feeding pipe fixed on the mounting plate. The side feeding pipe passes through the corresponding through holes on the first outer pipe and the first inner pipe and communicates with the inside of the first inner pipe to form an inclined pipe discharge port.

[0009] The present invention provides a feeding device with an anti-clogging structure for the discharge port, and further includes a slidable rod that is slidably fitted inside the first inner tube and whose driving end extends upward to the top of the first inner tube. The axial travel of the bottom end of the slidable rod is not less than the distance between the top of the inclined tube discharge port and the bottom of the first inner tube discharge port, and it can extend out of the first inner tube discharge port.

[0010] With the above structure, the feeding device of this utility model with an anti-clogging outlet structure has the following advantages: Because the inner and outer tubes of the central feeding pipe are continuously cooled by a circulating cooling water jacket, a good temperature environment is provided for the unblocking rod slidingly within the inner tube, relatively reducing the probability of inner wall adhesion and blockage. Furthermore, because the section of the central feeding pipe below the inclined outlet of the side feeding pipe, which is prone to blockage, is unblocked by the unblocking rod at regular or irregular intervals, and because the bottom end of the unblocking rod can extend outside or below the inner tube outlet, even if there is metal powder adhering to the outer wall of the outer tube blocking the inner tube outlet, it will be unblocked in time. This feeding device has a good unblocking effect, not only unblocking the lower end of the feeding pipe located inside the high-temperature furnace, but also simultaneously unblocking the inner tube outlet located inside the high-temperature furnace where powder such as nickel powder or copper powder has adhered and accumulated on the outer wall of the outer tube. It can maintain good unobstructed flow in the feeding pipe and the inner pipe outlet, so that the feeding pipe, especially the lower end of the pipe located in the high-temperature furnace where it is prone to blockage, and the outlet are always kept unobstructed.

[0011] Furthermore, the driving end of the unblocking rod is a manual drive end, or the driving end of the unblocking rod is coaxially connected to the free end of the driving rod of a linear drive mechanism. With the above structure, the unblocking rod can be manually driven at regular or irregular intervals to keep the feeding pipe, especially the lower end of the pipe located in the high-temperature furnace where blockages are prone to occur, and the discharge port unobstructed. Alternatively, a linear drive device can be used to drive the unblocking rod at regular or irregular intervals to keep the feeding pipe, especially the lower end of the pipe located in the high-temperature furnace where blockages are prone to occur, and the discharge port unobstructed.

[0012] Furthermore, there is an airtight structure between the unblocking rod and the upper end of the first inner tube. This structure ensures that the unblocking rod operates flexibly, reliably, and stably while maintaining good unblocking performance of the feeding pipe, and also maintains good sealing of the equipment.

[0013] Furthermore, the first inlet and first outlet of the first circulating cooling water jacket are both located on the first outer pipe above the mounting plate. The first inlet water channel connected to the first inlet and the first outlet water channel connected to the first outlet are connected at the bottom ends of the first inner pipe and the first outer pipe. With the above structure, the cooling water circulation is more reasonable, the cooling effect is better, it further prevents the pipe from sticking and clogging, and it makes the working environment of the unblocking rod better, thus maintaining a good unblocking effect.

[0014] Furthermore, there are multiple first water inlets, multiple first water inlet channels, multiple first water outlets, and multiple first water outlet channels. The multiple first water inlets and outlets are arranged at circumferential intervals, as are the multiple first water inlet channels and outlet channels. With this structure, the cooling water circulation is more efficient, the cooling effect is better, blockages inside the pipes are further prevented, and the working environment of the unblocking rod is improved, thus maintaining excellent unblocking performance.

[0015] Furthermore, the feeding device of this invention with an anti-clogging structure for the discharge port also includes multiple scraping rods for removing adhesive residue from the outer wall of the first outer tube, arranged along the outer circumference of the first outer tube and slidably fitted within multiple sliding through holes in the mounting plate. The top of each scraping rod is driven by a second linear drive mechanism, and the bottom of each scraping rod has an outer wall adhesive residue scraping head. Each scraping rod contains a second circulating cooling water jacket. With the above structure, because multiple scraping rods are added to the outer wall, powder adhesive residue that may adhere to the outer wall at the discharge port of the central feeding tube (i.e., the discharge port of the inner tube) is scraped and removed periodically or irregularly, further preventing or even avoiding the problem of clogging at the discharge port of the central feeding tube (i.e., the discharge port of the inner tube).

[0016] Furthermore, the second inlet and second outlet of the second circulating cooling water jacket are both located on the scraper rod above the mounting plate. The second inlet water channel, which connects to the second inlet, and the second outlet water channel, which connects to the second outlet, are connected at the lower end of the scraper rod above the scraper head. This structure ensures a good temperature environment for the scraper rod, making the scraping action of the scraper head flexible, stable, and reliable, further guaranteeing the scraping effect in removing powder adhering to the outer wall of the central feed pipe.

[0017] Furthermore, the inner wall of each scraper head is arc-shaped, conforming to the outer wall of the first outer tube, and there is a gap between adjacent scraper heads. This structure further ensures the scraping effect of removing powder adhering to the outer wall of the central feeding tube, and also further ensures the technical effect of flexible, stable, and reliable up-and-down scraping by the scraper head.

[0018] Furthermore, the scraper bar includes an upper rod and a lower rod. The lower rod is closer to the first outer tube, and the upper rod is farther from the first outer tube. The second water inlet channel of the upper rod and the lower rod are connected, and the second water outlet channel of the upper rod and the lower rod are also connected. The upper rod and the lower rod have a section that partially overlaps with each other. With the above structure, it is not only convenient for installation and normal operation, but also ensures that the second linear drive mechanism drives the scraper bar up and down flexibly, stably, and reliably. It also allows the scraper head at the lower end to fit against the outer wall and slide flexibly, stably, and reliably to scrape the powder adhering material on the outer wall of the central feeding pipe, resulting in a better scraping and removal effect.

[0019] Furthermore, the circular mounting plate has multiple arc-shaped elongated through holes for adjusting its circumferential position relative to the metal powder preparation equipment. This structure facilitates the installation and alignment of the central feeding pipe, side feeding pipes, and multiple scraping rods, further ensuring the normal and stable operation of the feeding device and the metal powder preparation equipment. Attached Figure Description

[0020] Figure 1 This is a vertical cross-sectional structural diagram of one embodiment of the feeding device of this utility model (manually driven unblocking rod).

[0021] Figure 2 This is a vertical cross-sectional structural diagram of another embodiment of the feeding device of this utility model (the first linear drive mechanism drives the unblocking rod).

[0022] Figure 3 yes Figure 1 and Figure 2 A magnified structural diagram of A in the middle.

[0023] Figure 4 yes Figure 1 and Figure 2 A magnified structural diagram of B in the diagram.

[0024] Figure 5 yes Figure 2 A three-dimensional structural diagram of the embodiment.

[0025] As shown in the figure:

[0026] 1. Mounting plate; 11. Sliding through hole; 12. Arc-shaped elongated through hole;

[0027] 2. Central feeding pipe; 21. First inner pipe; 211. First inner pipe outlet; 212. Sealing groove; 213. Feed inlet; 22. First outer pipe; 221. First water inlet; 222. First water outlet; 223. Inclined pipe through hole; 23. Flexible sealing ring; 24. First water inlet channel; 25. First water outlet channel;

[0028] 3. Side feeding pipe, 31. Inclined pipe, 311. Inclined pipe outlet;

[0029] 4. First linear drive mechanism; 41. First cylinder; 42. First piston rod;

[0030] 5. Unblocking rod; 51. Manual drive end; 52. Linear drive mechanism drive end;

[0031] 6. Scraper rod; 61. Scraper head; 62. Second water inlet; 63. Second water outlet; 64. Second water inlet channel; 65. Second water outlet channel; 66. Upper rod; 67. Lower rod; 68. Second inner tube; 69. Second outer tube. Detailed Implementation

[0032] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions of specific embodiments are intended to aid in understanding this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various specific embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown.

[0034] An embodiment of the feeding device with an anti-clogging structure for the discharge port of this utility model includes a mounting plate 1, with a central feeding pipe 2 fixed on the mounting plate 1. The mounting plate 1 can be circular, and can be directly connected and fixed to the metal powder preparation equipment, or indirectly connected and fixed via a frame. The mounting plate 1 can also be called a mounting base or mounting plate.

[0035] The central feeding pipe 2 includes a first inner pipe 21 and a first outer pipe 22 sleeved outside the first inner pipe 21. The cavity between the first inner pipe 21 and the first outer pipe 22 forms a first circulating water cooling jacket. The bottom end of the first inner pipe 21 is the first inner pipe outlet 211.

[0036] A preferred embodiment of the feeding device with an anti-clogging structure for the discharge port of this utility model further includes at least one side feeding pipe 3 fixed on the mounting plate 1. The side feeding pipe 3 passes through corresponding through holes on the first outer pipe 22 and the first inner pipe 21 and communicates with the inside of the first inner pipe 21 to form an inclined pipe discharge port 311. In other words, the inclined pipe 31 at the lower end of the side feeding pipe 3 is fixed and sealed to the inclined pipe through hole 223 on the first outer pipe 22, and fixed and sealed to the feed hole 213 at the lower end of the first inner pipe 21, with the inclined pipe discharge port 311 communicating with the inside of the first inner pipe 21.

[0037] An embodiment of the feeding device with an anti-clogging structure for the discharge port of this utility model further includes a clearing rod 5 that slides within the first inner tube 21 and whose driving end extends upward beyond the top of the first inner tube 21. The axial travel of the bottom end of the clearing rod 5 is not less than the distance between the top of the inclined tube discharge port 211 and the bottom end of the first inner tube discharge port 211, and it can extend beyond the first inner tube discharge port 211. In other words, the clearing rod 5 slides within the first inner tube 21, and its bottom end can slide above the inclined tube discharge port 311 or extend downward beyond the first inner tube discharge port 211. For example, the bottom end face of the clearing rod 5 can extend 10 mm beyond the bottom end face of the first inner tube discharge port 211.

[0038] The driving end of the unblocking rod 5 can be a manual driving end 51, or the driving end of the unblocking rod 5 can be coaxially connected to the free end of the driving rod 41 of the linear driving mechanism 4, that is, the driving end can also be the driving end 52 of the linear driving mechanism.

[0039] It is easy to understand that the outer diameter of the circular unclogging rod 5 matches the inner diameter of the first inner tube 21 with a clearance fit. The angle between the inclined tube 31 and the vertical central feeding tube 2 can be 30°-60°. The first inner tube 21 and the first outer tube 22 of the central feeding tube 2 can be made of high-temperature resistant steel such as stainless steel. The first linear drive mechanism 4 can be a cylinder, an electric cylinder, a hydraulic cylinder, or an electric push rod, etc. The first cylinder body 41 or the first housing of the first linear drive mechanism 4 can be fixed to the mounting plate 1, such as by a bracket. The free end of the first piston rod 42 or the first electric push rod of the first linear drive mechanism 4 is coaxially fixed to the top of the unclogging rod 5, such as by welding or integral molding.

[0040] There is an airtight structure between the unblocking rod 5 and the upper end of the first inner tube 21. For example, there may be a sealing groove 212 at the upper end of the first inner tube 21, and a flexible sealing ring 23 may be provided between the wall of the sealing groove 212 and the unblocking rod 5. Since the temperature at the top is not high, the flexible sealing ring 23 may be made of ordinary rubber. Of course, it may also be made of high-temperature resistant materials such as carbon packing or PTFE packing.

[0041] The first inlet 221 and the first outlet 222 of the first circulating cooling water jacket are both located on the first outer pipe 22 above the mounting plate 1. The first inlet water channel 24, which is connected to the first inlet 221, and the first outlet water channel 25, which is connected to the first outlet 222, are connected to the bottom ends of the first inner pipe 21 and the first outer pipe 22.

[0042] There can be multiple first inlets 221 and multiple first inlet channels 24; there can be multiple first outlets 222 and multiple first outlet channels 25. Multiple first inlets 221 and multiple first outlets 222 can be arranged at intervals along a circumference, and multiple first inlet channels 24 and multiple first outlet channels 25 can be arranged at intervals along a circumference. It is easy to understand that the first inlets 221 and first inlet channels 24 are separated from the adjacent first outlets 222 and first outlet channels 25 by partitions.

[0043] The unblocking rod 5 can be started at a set time. This timed start can be controlled by the main controller: the cylinder is controlled to intake or exhaust air via a solenoid valve, thereby starting or stopping the cylinder of the first linear drive mechanism 4. It is easy to understand that when the main controller controls the first linear drive mechanism 4 to start at a set time and drives the unblocking rod 5 downwards to extend out of the inner tube outlet 211, the feeding of the side feeding pipe 3 can be temporarily stopped simultaneously via a solenoid valve and other components. Normal feeding resumes only after the bottom of the unblocking rod 5 stops unblocking and retracts to the position inside the first inner tube 21 of the central feeding pipe 2 above the inclined tube outlet 311. With this structure, the main controller controls the unblocking rod 5 to unblock at set times, ensuring smooth material flow within the first inner tube 21 and the first inner tube outlet 222, while also ensuring that the movement of the unblocking rod 5 remains within the normal frequency range, thus guaranteeing the normal and stable operation of the metal powder preparation process.

[0044] A preferred embodiment of the feeding device with an anti-clogging structure for the discharge port of this utility model further includes multiple scraping rods 6 for the adhesive on the outer wall of the first outer tube 22, which are arranged along the outer circumference of the first outer tube 22 and slidably fitted in multiple sliding through holes 11 of the mounting plate 1. The top of each scraping rod 6 is driven by a second linear drive mechanism, and the bottom of each scraping rod 6 has an outer wall adhesive scraping head 61. Each scraping rod 6 has a second circulating cold water jacket inside.

[0045] The above paragraph can be elaborated as follows: The embodiment of the feeding device with the anti-clogging structure of the discharge port of this utility model also includes multiple scraping rods 6 arranged along the outer circumference of the first outer tube 22 and slidably fitted in multiple sliding through holes 11 of the mounting plate 1, such as three, for scraping the adhesive on the outer wall of the first outer tube 22. The top of each scraping rod 6 is driven by a second linear drive mechanism, and the bottom of each scraping rod 6 has a scraping head 61 for scraping the adhesive on the outer wall of the first outer tube 22. Each scraping rod 6 has a second circulating cold water jacket inside.

[0046] The second linear drive mechanism can be a pneumatic cylinder, an electric cylinder, a hydraulic cylinder, or an electric push rod, etc. The second cylinder body or the second housing of the second linear drive mechanism can be fixed to the mounting plate 1, and the free end of the second piston rod or the second push rod of the second linear drive mechanism is fixed to the top end of the scraper rod 6.

[0047] The second linear drive can adopt two specific structures:

[0048] The first type is a second linear drive mechanism that drives multiple scraping rods 6, such as multiple or three scraping rods 6. A connecting sleeve is fixed to the top of the connecting sleeve. The center of the top plate of the connecting sleeve is fixed to the free end of the second piston rod or the second electric push rod of the second linear drive mechanism. The second cylinder or the second housing of the second linear drive mechanism can be fixed on the mounting plate 1 by a bracket.

[0049] The second type involves multiple, such as three, individual second linear drive mechanisms that drive each scraper bar up and down in a one-to-one manner. For example, the free end of the piston rod or electric push rod of each second linear drive mechanism is coaxially fixed with the top of its respective scraper bar. The cylinder or housing of the three second linear drive mechanisms can be fixed together on a frame, which is fixed on a mounting plate. The main controller controls the multiple, such as three, second linear drive mechanisms to move up and down synchronously.

[0050] The second inlet 62 and the second outlet 63 of the second circulating cooling water jacket are both located on the scraper rod 6 above the mounting plate 1. The second inlet water channel 64, which communicates with the second inlet 62, and the second outlet water channel 65, which communicates with the second outlet 63, are connected at the lower end of the scraper rod 6 above the scraper head 61. That is, the second inlet water channel 64 and the second outlet water channel 65 are connected at the lower end of the scraper rod 6. There can be one second inlet 62, one second inlet water channel 64, one second outlet 63, and one second outlet water channel 65. For example, the scraper rod 6 is composed of a second inner tube 68 and a second outer tube 69. The top end of the second inner tube 68 is connected to the second inlet 62, and the second inlet water channel 64 is inside the second inner tube 68. The bottom end of the second inner tube 68 is connected to the second outlet water channel 65 inside the second outer tube 69, and the top end of the second outlet water channel 65 is connected to the second outlet 63 located on the second outer tube 69. It is easy to understand that since multiple scraper rods 6, such as three, need to slide up and down, the water inlet pipe connected to the second water inlet 62 of each scraper rod 6 and the water outlet pipe connected to the second water outlet 63 can both be flexible water pipes, such as soft plastic water pipes, and can all be connected with joints.

[0051] The inner wall of each scraper head 61 can be an arc shape that matches the outer wall of the first outer tube 22, and there is a gap between adjacent scraper heads 61 to avoid mutual interference.

[0052] The scraper rod 6 may include an upper rod 66 and a lower rod 67. The lower rod 67 is close to the first outer pipe 22, and the upper rod 66 is away from the first outer pipe 22. The upper rod 66 and the lower rod 67 are connected by a second water inlet channel 64, and the upper rod 66 and the lower rod 67 are also connected by a second water outlet channel 65. Figure 5 As shown, the upper rod 66 and the lower rod 67 may have a section that partially overlaps, making the structure more robust and the waterway more unobstructed. The lower rod 67 and the scraper head 61 may be made of high-temperature resistant steel such as stainless steel.

[0053] One or more second linear drive mechanisms can be started at a time, and the main controller can be used for timed control: the cylinder intake or exhaust is controlled by a solenoid valve to start or stop the cylinder.

[0054] Of course, both the first and second linear drive mechanisms can be activated intermittently, using sensors such as those located at the outlet of the first inner tube and at the bottom of the outer wall of the first outer tube. These sensors are electrically connected to the main controller. For example, if the pressure sensor at the outlet of the first inner tube senses the pressure of the blockage, it sends an electrical signal to the main controller. The main controller then activates the first linear drive mechanism to move the unblocking rod to clear the lower end of the inner tube until it extends out of the inner tube outlet, while simultaneously stopping the feeding from the control side feeding pipe. Similarly, if the pressure sensor at the bottom of the outer wall of the first outer tube senses the pressure of the adhesive or deposits on the outer wall, it sends an electrical signal to the main controller. The main controller then activates one or more second linear drive mechanisms to move multiple scraping rods up and down simultaneously to scrape the adhesive on the outer wall of the first outer tube.

[0055] The circular mounting plate 1 may have multiple, such as four, arc-shaped elongated through holes 12 for adjusting the circumferential position of the mounting plate 1 relative to the metal powder preparation equipment. The four arc-shaped elongated through holes 12 may be distributed at equal intervals along the circumference of the same circle.

[0056] It's easy to understand that at least the lower end of the unblocking rod 5 can be made entirely of high-temperature resistant materials, such as stainless steel or ceramic round rods. A high-temperature material, such as ceramic, can be used to create a gas seal between the lower end of the central feeding pipe 2 and the mounting hole of the high-temperature furnace. This gas seal does not affect the sliding motion of multiple scraper rods 6 (e.g., three lower rods 67) with the sealing ring. Alternatively, a gas seal structure can be used, consisting of high-temperature resistant metals such as stainless steel with internal circulating cooling water and high-temperature resistant flexible materials such as high-temperature resistant rubber. Sealing rings made of high-temperature resistant materials such as carbon packing or PTFE packing can also be used. The feed port is also called the feed inlet. The discharge port is also called the discharge outlet. If both the first linear drive mechanism 4 and the second linear drive mechanism use cylinders, commercially available adjustable stroke cylinders can be used for easier adjustment. The water inlet channel can be called the water inlet channel, and the water outlet channel can be called the water outlet channel. The scraper head 61 is also called the scraper shoe. It's easy to understand that because the three scraper rods 6 have relatively small diameters, their even distribution along the circumference prevents interference between the scraper rods 6 and the side feed tube 3. The aforementioned fixing methods include welding or multiple screw connections. The main controller can be a PLC programmable control chip or a computer.

[0057] Components, structures, or quantities not marked above are not shown in the drawings, and some components are not marked in the drawings. The drawings are for illustrative purposes only. In case of any inconsistency between the drawings and the text description, or between the drawings themselves, the text description shall prevail.

[0058] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A feeding device with an anti-clogging structure for the discharge port, comprising a mounting plate and a central feeding pipe fixed on the mounting plate; characterized in that: The central feeding pipe includes a first inner pipe and a first outer pipe sleeved outside the first inner pipe. The cavity between the first inner pipe and the first outer pipe forms a first circulating water cooling jacket. The bottom end of the first inner pipe is the discharge port of the first inner pipe. It also includes at least one side feeding pipe fixed on the mounting plate, wherein the side feeding pipe passes through the corresponding through holes on the first outer pipe and the first inner pipe and communicates with the inside of the first inner pipe to form an inclined pipe outlet. It also includes a slidable rod that is slidably fitted inside the first inner tube and whose driving end extends upward to the top of the first inner tube. The axial travel of the bottom end of the slidable rod is not less than the distance between the top of the inclined tube outlet and the bottom of the first inner tube outlet, and it can extend out of the first inner tube outlet.

2. The feeding device with anti-clogging structure of discharge port according to claim 1, characterized in that: The driving end of the unblocking rod is a manual driving end, or the driving end of the unblocking rod is coaxially connected to the free end of the driving rod of a linear driving mechanism.

3. The feeding device with anti-clogging structure of discharge port according to claim 1, characterized in that: There is an airtight structure between the unblocking rod and the upper end of the first inner tube.

4. The feeding device with anti-clogging structure of discharge port according to claim 1, characterized in that: The first inlet and the first outlet of the first circulating cooling water jacket are both located on the first outer tube above the mounting plate. The first inlet water channel connected to the first inlet and the first outlet water channel connected to the first outlet are connected at the bottom ends of the first inner tube and the first outer tube.

5. The feeding device with anti-clogging structure of discharge port according to claim 1, characterized in that: There are multiple first inlets, multiple first inlet channels, multiple first outlets, and multiple first outlet channels; the multiple first inlets and multiple first outlets are arranged at intervals along the circumference, and the multiple first inlet channels and multiple first outlet channels are arranged at intervals along the circumference.

6. The feeding device with anti-clogging structure of discharge port according to claim 1, characterized in that: It also includes multiple outer wall adhesive scraping rods arranged along the outer circumference of the first outer tube and slidably fitted in multiple sliding through holes of the mounting plate. The top of each scraping rod is driven by a second linear drive mechanism, the bottom of each scraping rod has an outer wall adhesive scraping head, and each scraping rod contains a second circulating cold water jacket.

7. The feeding device with anti-clogging structure of discharge port according to claim 6, characterized in that: The second inlet and the second outlet of the second circulating cooling water jacket are both located on the scraper rod above the mounting plate. The second inlet water channel, which is connected to the second inlet, and the second outlet water channel, which is connected to the second outlet, are connected at the lower end of the scraper rod above the scraper head.

8. The feeding device with anti-clogging structure of discharge port according to claim 7, characterized in that: The inner wall of each scraper head is an arc shape that matches the outer wall of the first outer tube, and there is a gap between adjacent scraper heads.

9. The feeding device with anti-clogging structure of discharge port according to claim 7, characterized in that: The scraper bar includes an upper bar and a lower bar. The lower bar is close to the first outer tube, and the upper bar is far from the first outer tube. The second water inlet channel of the upper bar and the lower bar are connected, and the second water outlet channel of the upper bar and the lower bar are also connected. The upper bar and the lower bar have a section that partially overlaps with each other.

10. The feeding device with anti-clogging structure of discharge port according to claim 1, characterized in that: The circular mounting plate has multiple arc-shaped elongated through holes for adjusting the circumferential position of the mounting plate relative to the metal powder preparation equipment.

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