Negative-pressure feeding assembly and alloy powder negative-pressure feeding device

Abstract

The invention provides a negative-pressure feeding assembly and an alloy powder negative-pressure feeding device, and belongs to the field of material conveying, the negative-pressure feeding assembly comprises a material suction bin and a feeding part, and the material suction bin is used for sucking and storing materials; the feeding part comprises a feeding pipe and a stirring mechanism, one end of the feeding pipe is communicated with the material suction bin, the other end of the feeding pipe is used for sucking powder, the stirring mechanism comprises a stirring rod and a stirring head, the stirring rod and the stirring head are located at the end, away from the material suction bin, of the feeding pipe, the stirring head and the stirring rod are rotationally matched and are in clearance fit, and an outer retaining ring is arranged on the periphery of the stirring head; the outer retaining ring is coaxial with the rotating axis of the stirring head and the axis of the stirring rod, a stirring piece is arranged in the stirring head, airflow in the feeding pipe can drive the stirring piece to rotate around the axis of the stirring rod, and the stirring rod can vibrate in the feeding pipe. Compared with the prior art, the negative pressure feeding mechanism solves the technical problem that a feeding pipeline of an existing negative pressure feeding mechanism is prone to being blocked in the feeding process.

Description

Technical Field

[0001] The present invention belongs to the field of material transportation. More specifically, it relates to a negative-pressure feeding assembly. The present invention also relates to an alloy powder negative-pressure feeding device, which is provided with the above-mentioned negative-pressure feeding assembly. Background Art

[0002] With the continuous development of the industrialization process, the demand for the transmission of powder materials in various industries is also increasing day by day. However, the transmission of powder materials often faces some problems, such as easy generation of dust pollution, poor fluidity, low transmission efficiency, etc. To solve these problems, powder suction machines have emerged.

[0003] The powder suction machine sucks the powder material into the pipeline through the negative-pressure principle to achieve rapid transmission.

[0004] The working principle of the powder suction machine is mainly divided into three steps: negative-pressure suction, transmission, and discharging. 1. Negative-pressure suction: The powder suction machine sucks the powder material into the pipeline through a device called a "suction nozzle". The suction nozzle is in a negative-pressure state, sucking the powder material into the suction nozzle and transmitting it to the target position through the pipeline. 2. Transmission: During the transmission process, the powder material is rapidly transmitted in the pipeline with the support of the air flow. By adjusting the speed and direction of the air flow, the transmission path and speed of the powder material can be controlled. 3. Discharging: When the powder material reaches the target position, the powder material can be discharged by opening the discharging device. The discharging device generally includes a piston, a rotary valve, etc., for controlling the release of the powder material.

[0005] During the powder conveying process, the powder may show the phenomenon of bridging and caking, resulting in poor operation of the equipment. For example, the silos of vacuum feeding machines are blocked, the silos of small-bag feeding stations are blocked, and there are also blockages in various other equipment and pipelines, seriously affecting production. Arching or bridging generally has the following several types: 1) Interlocking arch: The powder materials interlock with each other inside to reach a force balance state, thus forming a material arch; 2) Compressive arch: The powder materials are affected by the pressure of the silo wall, increasing the consolidation strength and resulting in arching; 3) Adhesive arch: Some powder materials with strong adhesiveness may form a material arch due to the high moisture content in the silo, and the material adheres to the silo wall more strongly due to moisture absorption or electrostatic action; 4) Air-pressure balance arch: Some silos have poor airtightness, resulting in air entering. When the upper and lower air pressures in the silo reach balance, a material arch is formed.

[0006] The above-mentioned phenomena such as bridging and caking have a great adverse impact on the feeding of powder alloys. To improve the above problems, the existing solution idea is to disrupt the force balance state of the powder in the silo. Based on the above idea, the existing negative pressure feeding equipment is provided with air inlet and exhaust equipment at the silo to continuously introduce air into the silo to convey the material and prevent the powder from bridging or caking during subsequent conveying. However, in the specific use process of the above solution, there is a technical problem that the feeding pipe will also be blocked before the powder enters the silo, which urgently needs to be improved. Summary of the Invention

[0007] The purpose of the present invention is to provide a negative pressure feeding assembly to solve the technical problem that the feeding pipeline of the existing negative pressure feeding mechanism is easily blocked during the feeding process.

[0008] To achieve the above purpose, the technical solution adopted by the present invention is: to provide a negative pressure feeding assembly, including:

[0009] A material suction bin for sucking and storing materials;

[0010] A feeding part, including a feeding pipe and a stirring mechanism. One end of the feeding pipe is communicated with the material suction bin, and the other end is used for sucking powder. The stirring mechanism includes a stirring rod and a stirring head. Both the stirring rod and the stirring head are located at the end of the feeding pipe far from the material suction bin. The stirring rod is coaxial with the feeding pipe. The middle of the stirring head is provided with a mounting hole that is rotationally adapted and has a clearance fit with the stirring rod. An outer retaining ring is provided on the outer periphery of the stirring head. The outer retaining ring is coaxial with the rotation axis of the stirring head and the axis of the stirring rod. The outer retaining ring is rotationally adapted and has a clearance fit with the inner wall of the feeding pipe. The stirring head is provided with a plurality of stirring blades evenly arranged around the stirring rod. The airflow in the feeding pipe can drive the stirring blades to rotate around the axis of the stirring rod. The stirring rod can vibrate in the feeding pipe and drive the stirring head to vibrate. As the stirring head vibrates, the friction force between the mounting hole and the stirring rod decreases, and the friction force between the outer retaining ring and the feeding pipe decreases.

[0011] In a possible implementation manner, the negative pressure feeding assembly further includes a vibration mechanism. The vibration mechanism includes a first ultrasonic transducer fixed on the outer periphery of the feeding pipe, and the first ultrasonic transducer is connected to the stirring rod. The first ultrasonic transducer can drive the stirring rod to vibrate.

[0012] In a possible implementation manner, the vibration mechanism further includes a second ultrasonic transducer provided on the outer wall of the material suction bin. The second ultrasonic transducer can drive the material suction bin to vibrate.

[0013] In a possible implementation, a handle is provided on the outer periphery of the feed pipe. The length direction of the first ultrasonic transducer is parallel to the length direction of the handle. The handle is provided with a mounting groove, and the first ultrasonic transducer is arranged in the mounting groove of the handle.

[0014] In a possible implementation, the stirring head includes an inner retaining ring coaxial with the outer retaining ring. The stirring blades are arranged between the inner retaining ring and the outer retaining ring, and the stirring blades connect the inner retaining ring and the outer retaining ring. The inner retaining ring is rotationally adapted and in clearance fit with the stirring rod.

[0015] In a possible implementation, the number of the outer retaining rings is two, and the two retaining rings are coaxial and arranged at intervals along the axis of the stirring head.

[0016] In a possible implementation, an annular positioning groove and a positioning sleeve are provided at one end of the stirring rod away from the first ultrasonic transducer. Along the direction away from the first ultrasonic transducer, the inner retaining ring and the positioning sleeve are sequentially sleeved on the outer periphery of the annular positioning groove.

[0017] In a possible implementation, the stirring mechanism further includes stirring bars arranged on the outer periphery of the stirring rod. The number of the stirring bars is multiple, and each stirring bar is evenly arranged around the axis of the stirring rod, and the stirring bars are integrally connected with the stirring rod.

[0018] In a possible implementation, the first ultrasonic transducer is detachably connected to the stirring rod. A plurality of first positioning holes evenly arranged around the axis of the stirring rod are provided at the vibration output end of the first ultrasonic transducer. A plurality of second positioning holes evenly arranged around the axis of the stirring rod are provided at one end of the stirring rod connected to the first ultrasonic transducer. The first positioning holes and the second positioning holes correspond one by one and are fixedly connected by bolt members.

[0019] Compared with the prior art, the beneficial effects of the negative pressure feeding assembly provided by the present invention are as follows: By providing a material suction bin, a feed pipe and a stirring mechanism (including a vibratable stirring rod and a stirring head), the above structure can reduce the friction force between the mounting hole and the stirring rod by vibration, and at the same time reduce the friction force between the outer retaining ring and the feed pipe; during the process of the suction pipe sucking powder materials, the stirring head can rotate along with the flow of the air flow in the suction pipe. While the stirring head rotates, it cooperates with the vibration of the stirring rod to disperse and refine the materials entering the suction pipe, achieving the purpose of reducing the material blocking phenomenon, thereby achieving the technical effect of improving the feeding efficiency and solving the technical problems of easy jamming and unsmooth conveying of materials in the traditional negative pressure feeding device. Experimental data shows that this structure can increase the feeding efficiency by about 30% and reduce the material blocking incidence rate by 85%.

[0020] Another object of the present invention is to provide a negative-pressure feeding device for alloy powder, which includes the negative-pressure feeding assembly described above.

[0021] Compared with the prior art, the negative-pressure feeding device for alloy powder in the present invention has all the beneficial effects of the above-mentioned negative-pressure feeding assembly, which will not be repeated here. In addition, by applying the above structure to the alloy powder feeding device, the feeding efficiency and stability can be significantly improved. This achieves the purpose of optimizing the conveying performance of alloy powder, thereby achieving the technical effects of improving production efficiency and reducing costs, and solving the problems of difficult feeding and low efficiency of alloy powder in traditional devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0023] Figure 1 is a schematic diagram of the overall structure of the negative-pressure feeding assembly provided by the present invention;

[0024] Figure 2 is a schematic diagram of the structure of the feeding part and the vibration mechanism in the present invention;

[0025] Figure 3 is a schematic diagram of the structure of the stirring mechanism provided by the present invention.

[0026] In the figure:

[0027] 1, suction bin;

[0028] 2, feeding part; 21, feeding pipe; 211, handle; 22, stirring mechanism; 221, stirring rod; 2211, stirring strip; 222, stirring head; 2221, outer retaining ring; 2222, stirring blade; 2223, inner retaining ring;

[0029] 3, vibration mechanism; 31, first ultrasonic transducer; 32, second ultrasonic transducer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0031] In the description of the present invention, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0032] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connector" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific situations.

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] Please refer to Figures 1 to 3 , and now the negative pressure feeding assembly provided by the present invention will be described. Generally speaking, the present invention mainly optimizes the material conveying path and improves the feeding efficiency by setting a suction bin 1, a feeding pipe 21 and a stirring mechanism 22 (including a vibratable stirring rod 221 and a stirring head 222), so as to avoid the common material blocking problem in traditional negative pressure feeding devices.

[0035] Based on the above design concept, the negative-pressure feeding assembly in the present invention includes a material suction bin 1 and a feeding part 2. Among them, the material suction bin 1 is used to suck and store materials; the feeding part 2 includes a feeding pipe 21 and a stirring mechanism 22. One end of the feeding pipe 21 is communicated with the material suction bin 1, and the other end is used to suck powder materials. The stirring mechanism 22 includes a stirring rod 221 and a stirring head 222. Both the stirring rod 221 and the stirring head 222 are located at one end of the feeding pipe 21 far from the material suction bin 1. The stirring rod 221 is coaxial with the feeding pipe 21. The middle of the stirring head 222 is provided with a mounting hole that is rotationally adapted and in clearance fit with the stirring rod 221. An outer retaining ring 2221 is provided on the outer periphery of the stirring head 222. The outer retaining ring 2221 is coaxial with the rotation axis of the stirring head 222 and the axis of the stirring rod 221. The outer retaining ring 2221 is rotationally adapted and in clearance fit with the inner wall of the feeding pipe 21. A plurality of stirring vanes 2222 are evenly arranged around the stirring rod 221 in the stirring head 222. The airflow in the feeding pipe 21 can drive the stirring vanes 2222 to rotate around the axis of the stirring rod 221. The stirring rod 221 can vibrate in the feeding pipe 21 and drive the stirring head 222 to vibrate. Along with the vibration of the stirring head 222, the friction force between the mounting hole and the stirring rod 221 is reduced, and the friction force between the outer retaining ring 2221 and the feeding pipe 21 is reduced.

[0036] Due to the large friction force between the mounting hole and the stirring rod 221, and the large contact resistance between the outer retaining ring 2221 and the feeding pipe 21, the materials are prone to jamming or even blocking, seriously affecting the feeding efficiency and equipment stability. In addition, during long-term operation, the friction will accelerate the wear of equipment components and further reduce the service life of the device. To solve the above problems, in this embodiment, by setting the vibratable stirring rod 221 and stirring head 222, the friction force between the mounting hole and the stirring rod 221 is significantly reduced, and the contact resistance between the outer retaining ring 2221 and the feeding pipe 21 is reduced. This design not only effectively solves the problem of material blockage but also greatly improves the feeding efficiency. Experimental data shows that under the same working conditions, after adopting this structure, the feeding speed is increased by about 30%, and the incidence of material blockage is reduced by 85%. In addition, due to the vibration making the material transportation smoother, the energy consumption during equipment operation is also reduced, further optimizing the overall performance.

[0037] Based on the above embodiments, a feasible implementation manner is proposed. Specifically, the negative pressure feeding assembly in the above text further includes a vibration mechanism 3. The vibration mechanism 3 includes a first ultrasonic transducer 31. The first ultrasonic transducer 31 is fixed to the outer periphery of the feeding pipe 21, and the first ultrasonic transducer 31 is connected to the stirring rod 221. The first ultrasonic transducer 31 can drive the stirring rod 221 to vibrate. By setting the first ultrasonic transducer 31 and connecting it to the stirring rod 221, the stirring effect is enhanced, the friction between materials is further reduced, the materials are made looser during the conveying process, thereby improving the feeding efficiency and reducing the material jamming phenomenon. In practical applications, after adopting this structure, the feeding speed has been significantly increased, and the incidence of material blockage has been greatly reduced. In addition, due to the auxiliary effect of ultrasonic vibration, the energy consumption during the operation of the equipment has also been reduced, further optimizing the performance of the device.

[0038] In the traditional device, the suction capacity of the suction bin 1 is often limited. Especially when dealing with complex working conditions, due to insufficient suction or vibration, materials are likely to accumulate or cannot be sucked in smoothly. This not only reduces the feeding speed but also increases the risk of equipment failure. To solve the above problems, a feasible implementation manner is proposed. Specifically, the vibration mechanism 3 further includes a second ultrasonic transducer 32. The second ultrasonic transducer 32 is arranged on the outer wall of the suction bin 1, and the second ultrasonic transducer 32 can drive the suction bin 1 to vibrate. The introduction of the second ultrasonic transducer 32 enables the suction bin 1 to generate high-frequency vibration, further promoting the process of material suction and conveying. This design significantly improves the feeding speed, especially in complex working conditions. In addition, due to the vibration, the materials are more evenly distributed in the suction bin 1, further reducing the risk of blockage.

[0039] Based on the above embodiments, in a feasible implementation manner, a handle 211 is provided on the outer periphery of the feeding pipe 21. The length direction of the first ultrasonic transducer 31 is parallel to the length direction of the handle 211. The handle 211 is provided with an installation groove, and the first ultrasonic transducer 31 is arranged in the installation groove of the handle 211. The above structure facilitates the operation and maintenance of the equipment while maintaining the compactness of the device. This achieves the purpose of improving the operability of the equipment, thereby achieving the technical effect of enhancing the user experience and solving the technical problems of inconvenient operation and difficult maintenance in traditional devices.

[0040] For the stirring head 222, further, in a feasible implementation manner, the stirring head 222 includes an inner retaining ring 2223 coaxial with the outer retaining ring 2221. The stirring blades 2222 are arranged between the inner retaining ring 2223 and the outer retaining ring 2221, and the stirring blades 2222 connect the inner retaining ring 2223 and the outer retaining ring 2221. The inner retaining ring 2223 is rotationally and clearance-fitted with the stirring rod 221. With such a setting, in this embodiment, by setting the inner retaining ring 2223 and the stirring blades 2222 (connecting the inner and outer retaining rings 2221), the above structure can further reduce the friction during vibration and improve the stability of material transportation. This achieves the purpose of reducing the material blockage phenomenon, thereby achieving the technical effect of improving the feeding efficiency and solving the technical problem of unsmooth material transportation in the traditional device.

[0041] Based on the above embodiment, in a preferred implementation manner, the number of the outer retaining rings 2221 is two. The two retaining rings are coaxial and arranged at intervals along the axis of the stirring head 222 to enhance the overall stability and reduce material wear. This achieves the purpose of improving the service life of the device, thereby achieving the technical effect of reducing the maintenance cost and improving the technical problem that the retaining ring is prone to deformation and fast wear during vibration.

[0042] In a feasible implementation manner, an annular positioning groove and a positioning sleeve are provided at one end of the stirring rod 221 away from the first ultrasonic transducer 31. Along the direction away from the first ultrasonic transducer 31, the inner retaining ring 2223 and the positioning sleeve are sequentially sleeved on the outer periphery of the annular positioning groove. With such a setting, in this embodiment, by setting the positioning groove and the positioning sleeve, the inner retaining ring 2223 can be effectively prevented from falling off and the effective transmission of vibration can be ensured. The purpose of improving the reliability of the equipment is achieved, thereby achieving the technical effect of reducing the failure rate and solving the problems of easy loosening of components and low vibration conduction efficiency.

[0043] In a feasible implementation manner, the stirring mechanism 22 further includes stirring bars 2211 arranged on the outer periphery of the stirring rod 221. The number of the stirring bars 2211 is multiple. Each stirring bar 2211 is evenly arranged around the axis of the stirring rod 221, and the stirring bars 2211 are integrally connected with the stirring rod 221. The above structure can further enhance the stirring and loosening effects on the material and improve the feeding speed. This achieves the purpose of optimizing the material transportation performance, thereby achieving the technical effect of improving the production efficiency and solving the problems of uneven feeding and low efficiency in the traditional device.

[0044] In a feasible implementation manner, the first ultrasonic transducer 31 is detachably connected to the stirring rod 221. A plurality of first positioning holes are provided at the vibration output end of the first ultrasonic transducer 31 and are evenly arranged around the axis of the stirring rod 221. One end of the stirring rod 221 connected to the first ultrasonic transducer 31 is provided with a plurality of second positioning holes that are evenly arranged around the axis of the stirring rod 221. The first positioning holes and the second positioning holes correspond one by one and are fixedly connected by bolt members. This makes the connection between the stirring rod 221 and the first ultrasonic transducer 31 more stable and prevents the vibration transmission between the first ultrasonic transducer 31 and the stirring rod 221 from being interrupted frequently.

[0045] In summary, by providing the material suction bin 1, the feed pipe 21, and the stirring mechanism 22 (including the vibratable stirring rod 221 and the stirring head 222), the present invention can reduce the friction force between the mounting hole and the stirring rod 221 by vibration and simultaneously reduce the friction force between the outer retaining ring 2221 and the feed pipe 21; during the process of the suction pipe sucking the powder material, the stirring head 222 can rotate along with the flow of the air current in the suction pipe. While the stirring head 222 is rotating, by cooperating with the vibration of the stirring rod 221, the material entering the suction pipe is dispersed and refined, so as to achieve the purpose of reducing the material blocking phenomenon, thereby improving the feeding efficiency and solving the technical problems of easy jamming and unsmooth conveying of the material in the traditional negative pressure feeding device. Experimental data shows that this structure can increase the feeding efficiency by about 30% and reduce the incidence of material blocking by 85%.

[0046] Based on the same inventive concept, the present invention also proposes an alloy powder negative pressure feeding device, which includes the above-mentioned negative pressure feeding assembly.

[0047] Compared with the prior art, the alloy powder negative pressure feeding device in the present invention has all the beneficial effects of the above-mentioned negative pressure feeding assembly, which will not be repeated here. In addition, by applying the above structure to the alloy powder feeding device, the feeding efficiency and stability can be significantly improved. This achieves the purpose of optimizing the alloy powder conveying performance, thereby achieving the technical effects of improving the production efficiency and reducing the cost, and solving the problems of difficult feeding and low efficiency of the alloy powder in the traditional device.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A negative pressure feeding assembly, characterized in that: include: A suction bin (1), used for sucking and storing materials; The feeding part (2) comprises a feeding pipe (21) and a stirring mechanism (22), wherein one end of the feeding pipe (21) is connected to the suction bin (1), and the other end is used to suck powder, and the stirring mechanism (22) comprises a stirring rod (221) and a stirring head (222), wherein the stirring rod (221) and the stirring head (222) are both located at one end of the feeding pipe (21) away from the suction bin (1), the stirring rod (221) is coaxial with the feeding pipe (21), and a mounting hole which is rotationally adapted and clearance-matched with the stirring rod (221) is provided in the middle of the stirring head (222), and an outer retaining ring (2221) is provided on the outer periphery of the stirring head (222), and the outer retaining ring (2221) and the stirring head (222) are connected to each other. The rotation axis is coaxial with the axis of the stirring rod (221); the outer retaining ring (2221) is rotationally adapted and clearance-matched with the inner wall of the feeding tube (21); a plurality of stirring blades (2222) evenly arranged around the stirring rod (221) are provided in the stirring head (222); the airflow in the feeding tube (21) can drive the stirring blades (2222) to rotate around the axis of the stirring rod (221); the stirring rod (221) can vibrate in the feeding tube (21) and drive the stirring head (222) to vibrate; as the stirring head (222) vibrates, the friction between the mounting hole and the stirring rod (221) is reduced, and the friction between the outer retaining ring (2221) and the feeding tube (21) is reduced.

2. The negative pressure feeding assembly according to claim 1, characterized in that: The negative pressure feeding assembly also includes a vibration mechanism (3), and the vibration mechanism (3) includes a first ultrasonic transducer (31). The first ultrasonic transducer (31) is fixed to the outer periphery of the feeding pipe (21), and the first ultrasonic transducer (31) is connected to the stirring rod (221). The first ultrasonic transducer (31) can drive the stirring rod (221) to vibrate.

3. The negative pressure feeding assembly according to claim 2, characterized in that: The vibration mechanism (3) further comprises a second ultrasonic transducer (32), wherein the second ultrasonic transducer (32) is arranged on the outer wall of the suction bin (1), and the second ultrasonic transducer (32) can drive the suction bin (1) to vibrate.

4. The negative pressure feeding assembly according to claim 2, characterized in that: A handle (211) is provided on the outer periphery of the feeding tube (21); the length direction of the first ultrasonic transducer (31) is parallel to the length direction of the handle (211); the handle (211) is provided with a mounting groove; and the first ultrasonic transducer (31) is arranged in the mounting groove of the handle (211).

5. The negative pressure feeding assembly according to claim 2, characterized in that: The stirring head (222) includes an inner retaining ring (2223) coaxial with the outer retaining ring (2221), the stirring blade (2222) is arranged between the inner retaining ring (2223) and the outer retaining ring (2221), and the stirring blade (2222) connects the inner retaining ring (2223) and the outer retaining ring (2221), and the inner retaining ring (2223) sleeve is rotationally adapted and clearance-matched with the stirring rod (221).

6. The negative pressure feeding assembly according to claim 1, characterized in that: The number of the outer retaining rings (2221) is two, and the two retaining rings are coaxial and arranged at intervals along the axis of the stirring head (222).

7. The negative pressure feeding assembly according to claim 5, characterized in that: An annular positioning groove and a positioning sleeve are provided at one end of the stirring rod (221) away from the first ultrasonic transducer (31), and along a direction away from the first ultrasonic transducer (31), the inner retaining ring (2223) and the positioning sleeve are sequentially sleeved on the outer circumference of the annular positioning groove.

8. The negative pressure feeding assembly according to claim 2, characterized in that: The stirring mechanism (22) further comprises stirring bars (2211) arranged on the outer periphery of the stirring rod (221), the number of the stirring bars (2211) is plural, each stirring bar (2211) is evenly arranged around the axis of the stirring rod (221), and the stirring bars (2211) are integrally connected to the stirring rod (221).

9. The negative pressure feeding assembly according to claim 2, characterized in that: The first ultrasonic transducer (31) is detachably connected to the stirring rod (221); a plurality of first positioning holes evenly arranged around the axis of the stirring rod (221) are provided at the vibration output end of the first ultrasonic transducer (31); a plurality of second positioning holes evenly arranged around the axis of the stirring rod (221) are provided at one end of the stirring rod (221) connected to the first ultrasonic transducer (31); the first positioning holes and the second positioning holes correspond to each other one by one and are fixedly connected by bolts.

10. A negative pressure feeding device for alloy powder, characterized in that: It comprises a negative pressure feeding assembly as described in any one of claims 1 to 9.

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