Powder pumping prevention device for producing powder metallurgy target material

Abstract

The utility model relates to the technical field of target material production equipment, in particular to a powder pumping prevention device for producing powder metallurgy target materials. Comprising a collecting hopper and a three-way branch pipe, the collecting hopper comprises a cylinder part, a second exhaust pipe is arranged on one side of the cylinder part, a conical part is arranged on the lower portion of the cylinder part, a first exhaust pipe is arranged at the bottom of the conical part, a cover plate is arranged on the top of the cylinder part, and a third exhaust pipe is arranged on the cover plate; the upper end and the lower end of the three-way forked pipe are open, a backflow pipe inclining upwards is arranged on one side of the three-way forked pipe, the second exhaust pipe is connected with the upper end of the three-way forked pipe through a first rubber pipe, the first exhaust pipe is connected with the backflow pipe through a second rubber pipe, and the first rubber pipe and the second rubber pipe are both sleeved with partition assemblies. According to the utility model, the powder pumped out of the sheath does not enter the mechanical vacuum pump.

Description

Technical Field

[0001] The utility model relates to the technical field of target material production equipment, in particular to a powder extraction prevention device for producing powder metallurgy target materials. Background Art

[0002] Hot isostatic pressing is a common process for producing target materials. It involves putting metal or ceramic powder (about 150 mesh) into Figure 4 In the illustrated package 6, the package 6 is then evacuated, and then placed in a hot isostatic pressing device for hot isostatic pressing to obtain a dense metal or ceramic ingot, which is then machined to obtain a target material of the required specifications. When evacuating the package, a rubber tube is used to connect the powder filling pipe at the top of the package 6 to the exhaust pipe of the vacuum equipment (including a mechanical vacuum pump and a diffusion pump connected in parallel). The mechanical vacuum pump is then used to evacuate the pressure inside the package 6 to below 0.1 Pa. The diffusion pump is then used to evacuate the pressure inside the package 6 to below 0.001 Pa to meet the vacuum requirement. The mechanical vacuum pump is initially used because of its high efficiency. However, due to its high efficiency and large exhaust volume, the powder in the package 6 is easily extracted within a few minutes of the initial evacuation and enters the mechanical vacuum pump along the rubber tube, causing the mechanical vacuum pump to malfunction. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a powder extraction prevention device for producing powder metallurgy targets in view of the above-mentioned technical deficiencies.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a powder extraction prevention device for producing powder metallurgy target materials, including a collecting hopper and a three-way fork pipe, the collecting hopper includes a cylindrical portion, a second exhaust pipe is provided on one side of the cylindrical portion, a conical portion is provided at the lower portion of the cylindrical portion and a first exhaust pipe is provided at the bottom of the conical portion, a cover plate is provided on the top of the cylindrical portion and a third exhaust pipe is provided on the cover plate, the upper and lower ends of the three-way fork pipe are open and an upward inclined return pipe is provided on one side, the second exhaust pipe is connected to the upper end of the three-way fork pipe through a first rubber tube, the first exhaust pipe is connected to the return pipe through a second rubber tube, and the outside of the first rubber tube and the second rubber tube are both provided with a partition assembly.

[0005] To further optimize this technical solution, a baffle is provided in the cylindrical portion, the upper side of the baffle is sealed with the cover plate, the two sides of the baffle are sealed with the inner wall of the cylindrical portion, there is a gap between the lower side of the baffle and the inner wall of the conical portion, and the second exhaust pipe is provided at the upper part of the side wall of the cylindrical portion.

[0006] To further optimize the technical solution, the baffle is inclined from top to bottom toward the side where the second exhaust pipe is located.

[0007] To further optimize the technical solution, a diverter plate is provided on the side of the baffle plate facing the second exhaust pipe, and the height of the upper surface of the diverter plate gradually decreases from the middle to the two ends.

[0008] To further optimize this technical solution, the partition assembly includes a first plywood and a second plywood, studs are provided on both sides of a side of the first plywood close to the second plywood, and through holes are provided on the second plywood for passing the studs, and the studs are connected to nuts after passing through the through holes.

[0009] To further optimize the technical solution, a convex strip is provided in the middle of one side of the first splint close to the second splint.

[0010] To further optimize the technical solution, the cross section of the convex strip is semicircular.

[0011] The utility model has the following advantages: 1. The powder entering the collecting hopper through the second exhaust pipe will settle in the collecting hopper, and is not easy to enter the mechanical vacuum pump. When the mechanical vacuum pump is turned off, the partition device outside the second rubber tube can be opened to allow the powder settled in the conical part to flow back into the sheath, thereby reducing the waste of powder; 2. A baffle is provided in the cylindrical part and a diverter plate is provided on the baffle, so that the powder is less likely to enter the third exhaust pipe with the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of a powder extraction prevention device for producing powder metallurgy targets.

[0013] Figure 2 Schematic diagram of the structure of the aggregate hopper.

[0014] Figure 3 Schematic diagram of the structure of the partition component.

[0015] Figure 4 Schematic diagram of the structure of the package.

[0016] In the figure: 1. Three-way fork pipe; 2. First rubber tube; 3. Partition assembly; 31. First clamping plate; 311. Raised strip; 32. Stud; 33. Nut; 34. Second clamping plate; 4. Second rubber tube; 5. Collecting hopper; 51. Cylindrical portion; 52. Conical portion; 53. First exhaust pipe; 54. Second exhaust pipe; 55. Third exhaust pipe; 56. Baffle; 57. Diverter plate; 6. Sleeve. DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0018] Specific implementation method: Figure 1-4 As shown, a powder extraction prevention device for producing powder metallurgy targets includes a collecting hopper 5 and a three-way fork pipe 1. The collecting hopper 5 and the three-way fork pipe 1 are preferably made of stainless steel. The collecting hopper 5 includes a cylindrical portion 51, and a second exhaust pipe 54 is provided on one side of the cylindrical portion 51. A conical portion 52 is provided at the lower portion of the cylindrical portion 51 and a first exhaust pipe 53 is provided at the bottom of the conical portion 52. A cover plate is provided on the top of the cylindrical portion 51 and a third exhaust pipe 55 is provided on the cover plate. The cover plate is sealed with the cylindrical portion 51. The upper and lower ends of the three-way fork pipe 1 are open and an upwardly inclined return pipe is provided on one side. The second exhaust pipe 54 is connected to the upper end of the three-way fork pipe 1 through a first rubber tube 2, and the first exhaust pipe 53 is connected to the return pipe through a second rubber tube 4. The outer sleeve of the second rubber tube 4 is provided with a partition component 3. The partition component 3 can block the air path inside the second rubber tube 4. Opening the partition component 3 can make the air path inside the second rubber tube 4 unblocked. The first rubber tube 2 is preferably also sheathed with a partition assembly 3 so as to partition the first rubber tube 2 when needed.

[0019] A baffle 56 is disposed within the cylindrical portion 51. The upper side of the baffle 56 is sealed to the cover plate, and both sides of the baffle 56 are sealed to the inner wall of the cylindrical portion 51. A large gap exists between the lower side of the baffle 56 and the inner wall of the tapered portion 52. The second exhaust pipe 54 is disposed at the upper portion of the sidewall of the cylindrical portion 51, with the lower end of the baffle 56 lower than the position of the second exhaust pipe 54. Powder entering the collecting hopper 5 from the second exhaust pipe 54 is blocked by the baffle 56 and then falls. In this case, the third exhaust pipe 55 is disposed on the side of the baffle 56 away from the second exhaust pipe 54.

[0020] The baffle 56 is inclined from top to bottom toward the side where the second exhaust pipe 54 is located. When the powder falls from the baffle 56 , it is far away from the third exhaust pipe 55 .

[0021] A diverter plate 57 is provided on the side of the baffle 56 facing the second exhaust pipe 54. The upper surface of the diverter plate 57 gradually decreases in height from the center to the ends. The top of the diverter plate 57 is lower than the location of the second exhaust pipe 54. After the powder lands on the diverter plate 57, most of it falls along the diverter plate 57. After falling from the diverter plate 57, the powder is closer to the inner wall of the tapered portion 52 and is less likely to be carried away by the airflow.

[0022] The partition assembly 3 includes a first clamping plate 31 and a second clamping plate 34. Studs 32 are provided on both sides of the first clamping plate 31 near the second clamping plate 34. The second clamping plate 34 is provided with through holes for the studs 32 to pass through. The studs 32 pass through the through holes and are connected to nuts 33. Tightening the nuts 33 brings the first and second clamping plates 31 and 34 closer together, thereby flattening the rubber tube and making it airtight.

[0023] A ridge 311 is provided in the middle of one side of the first clamping plate 31 close to the second clamping plate 34 . The existence of the ridge 311 enhances the partition effect of the partition assembly 3 .

[0024] The cross section of the protrusion 311 is semicircular, which is not easy to damage the rubber tube.

[0025] When used, combine Figure 1-4 As shown, the third exhaust pipe 55 is connected to the exhaust pipe of the vacuum equipment through a pipeline, and the lower end of the three-way fork pipe 1 is connected to the powder filling pipe of the sheath 6 through a rubber tube (the rubber tube is set on the outside of both), and the rubber tube is in a nearly vertical state. Before vacuuming, tighten the nut 33 on the external partition assembly 3 of the second rubber tube 4 to make the second rubber tube 4 airtight, and then vacuumize. During vacuuming, the airflow enters the collection hopper 5 through the second exhaust pipe 54. Due to the large space in the collection hopper 5, the powder in the airflow settles in the tapered portion 52, making it difficult to enter the mechanical vacuum pump. When the mechanical vacuum pump is turned off and the diffusion pump is turned on, the airflow is very small. At this time, the partition assembly 3 outside the second rubber tube 4 can be opened to make the second rubber tube 4 unobstructed. Under the action of gravity, the powder in the tapered portion 52 will flow back into the sheath 6.

[0026] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. A device for preventing powder extraction for producing powder metallurgy targets, characterized in that: The utility model comprises a collecting hopper (5) and a three-way fork pipe (1), wherein the collecting hopper (5) comprises a cylindrical portion (51), a second exhaust pipe (54) is provided on one side of the cylindrical portion (51), a conical portion (52) is provided at the lower portion of the cylindrical portion (51), and a first exhaust pipe (53) is provided at the bottom of the conical portion (52), a cover plate is provided at the top of the cylindrical portion (51), and a third exhaust pipe (55) is provided on the cover plate, the upper and lower ends of the three-way fork pipe (1) are open, and an upwardly inclined return pipe is provided on one side thereof, the second exhaust pipe (54) is connected to the upper end of the three-way fork pipe (1) through a first rubber tube (2), the first exhaust pipe (53) is connected to the return pipe through a second rubber tube (4), and the outer sleeve of the second rubber tube (4) is provided with a partition assembly (3).

2. The device for preventing powder extraction for producing powder metallurgy targets according to claim 1, characterized in that: A baffle (56) is provided in the cylindrical portion (51), the upper side of the baffle (56) is sealed with the cover plate, the two sides of the baffle (56) are sealed with the inner wall of the cylindrical portion (51), and there is a gap between the lower side of the baffle (56) and the inner wall of the conical portion (52), and the second exhaust pipe (54) is provided at the upper part of the side wall of the cylindrical portion (51).

3. The device for preventing powder extraction for producing powder metallurgy targets according to claim 2, characterized in that: The baffle (56) is inclined from top to bottom toward the side where the second exhaust pipe (54) is located.

4. The device for preventing powder extraction for producing powder metallurgy targets according to claim 2, characterized in that: A diverter plate (57) is provided on one side of the baffle (56) facing the second exhaust pipe (54), and the height of the upper surface of the diverter plate (57) gradually decreases from the middle to both ends.

5. A powder extraction prevention device for producing powder metallurgy targets according to any one of claims 1 to 4, characterized in that: The partition assembly (3) comprises a first clamping plate (31) and a second clamping plate (34); studs (32) are provided on both sides of a side of the first clamping plate (31) close to the second clamping plate (34); a through hole for passing the studs (32) is provided on the second clamping plate (34); the studs (32) are connected to the nuts (33) after passing through the through holes.

6. The device for preventing powder extraction for producing powder metallurgy targets according to claim 5, characterized in that: A convex strip (311) is provided in the middle of one side of the first clamping plate (31) close to the second clamping plate (34).

7. The device for preventing powder extraction for producing powder metallurgy targets according to claim 6, characterized in that: The cross section of the convex strip (311) is semicircular.

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