Crucible capable of preventing powder from splashing
By setting threaded holes and grooves on the crucible body and lid, and using screws to fix the lid and form an exhaust channel, the problem of powder splashing caused by loose traditional crucible lids is solved, achieving efficient splash prevention and convenient operation.
Patent Information
- Application Number
- CN202520459222.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-14
AI Technical Summary
Traditional crucible lids are prone to loosening or falling off during high-temperature reactions, leading to powder splashing, waste of raw materials, equipment contamination, and safety hazards.
A crucible body and lid structure was designed. The lid is fixed with screws by setting threaded holes and grooves at the opening end of the receiving cavity, and an exhaust channel is formed between the lid and the groove. Combined with a powder collection hood, the sprayed powder is collected.
It effectively prevents powder splashing, reduces powder loss rate, ensures a safe experimental environment, is easy to clean, simple to operate, and inexpensive.
Smart Images
Figure CN223936230U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crucible technology, specifically to a crucible for preventing powder splashing. Background Technology
[0002] Currently, traditional crucibles typically employ a simple lid structure, which cannot effectively secure the lid. During the reaction process, excessive internal pressure can easily cause the lid to loosen or fall off, failing to effectively prevent powder splashing.
[0003] For example, in the preparation of niobium carbide, a high-temperature reaction method is typically used. Niobium powder and carbon powder are mixed and placed in a crucible, where they react at high temperatures. However, during the reaction, the vigorous reaction easily generates a large amount of gas, causing a sudden increase in pressure inside the crucible, which leads to powder splashing. Powder splashing not only wastes raw materials but also contaminates equipment and even poses safety hazards. Utility Model Content
[0004] The purpose of this invention is to provide a crucible that prevents powder splashing, thereby solving the problem in the background art where the crucible cover becomes loose or falls off during the reaction process due to the inability to effectively fix the cover, resulting in powder splashing.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A crucible for preventing powder splashing, comprising:
[0007] The crucible body has an upward-opening receiving cavity with the axis of the receiving cavity extending along a first direction. A plurality of threaded holes are provided on the end face of the opening end of the receiving cavity, and the axes of the plurality of threaded holes all extend along the first direction. At least one groove extending along a second direction is also provided on the end face of the opening end of the receiving cavity, and the groove communicates with the receiving cavity. The second direction is perpendicular to the first direction.
[0008] The cover has a projected area along a first direction that is larger than the projected area of the inner envelope of the cavity opening along the first direction. The cover has several fixing holes corresponding one-to-one with the threaded holes, allowing it to be fixed to the opening of the cavity by screws. An exhaust channel is formed between the cover and the groove at the opening of the cavity. With this structure, assembly is simple; just tighten the corresponding screws to the cover and the crucible body. Fixing the cover to the crucible body effectively prevents the lid from loosening or falling off due to excessive internal pressure during the reaction, thus effectively preventing excessive powder splashing.
[0009] A powder collection hood is disposed on the outer periphery of the crucible body to collect the powder discharged from the exhaust channel.
[0010] Furthermore, the powder collecting hood includes a lower cover with an upward-opening storage slot. The depth of the storage slot is greater than the height of the crucible body, and the crucible body is placed in the storage slot. The powder collecting hood has a simple structure; in use, the assembled crucible body and cover can simply be placed directly into the storage slot.
[0011] Furthermore, the powder collection hood also includes an upper cover, which covers the opening of the lower hood. By providing the upper cover, powder can be effectively prevented from spraying out of the lower hood, facilitating cleaning and hygiene.
[0012] Furthermore, the groove is spaced apart from the threaded hole. This arrangement prevents the screw from interfering with gas escape.
[0013] Furthermore, the sidewall thickness of the receiving cavity is ≥10mm, which facilitates the creation of threaded holes. The width of the groove is 5-10mm, and the depth of the groove is 1-5mm. This design allows for the timely discharge of gases generated during the reaction process and prevents excessive powder splashing.
[0014] Furthermore, the thickness of the cover is ≥10mm.
[0015] Furthermore, the outer contour of the crucible body is cubic, the lid is cubic in shape, the receiving cavity is cubic, the inner side length of the receiving cavity is 80mm, the side wall thickness of the receiving cavity is 10mm, the side length of the lid is 100mm, and the thickness of the lid is 10mm.
[0016] Furthermore, the outer contour of the crucible body is cuboid, and the lid is cuboid in shape; the receiving cavity is cuboid, the short side of the receiving cavity is 80mm, the long side is 100mm, and the sidewall thickness of the receiving cavity is 15mm; the short side of the lid is 110mm, the long side is 130mm, and the thickness of the lid is 12mm.
[0017] Furthermore, the outer contour of the crucible body is cylindrical, the cover is cylindrical and sheet-like; the receiving cavity is cylindrical, the inner diameter of the receiving cavity is 80mm, the sidewall thickness of the receiving cavity is 10mm, the diameter of the cover is 100mm, and the thickness of the cover is 15mm.
[0018] Furthermore, both the crucible body and the lid are made of graphite; the screws are graphite screws.
[0019] This invention has the following advantages over the prior art:
[0020] 1. This utility model discloses a crucible for preventing powder splashing. The crucible body has an upward-opening receiving cavity. Several threaded holes and at least one groove are provided on the open end face of the receiving cavity. A fixing hole corresponding to each threaded hole is provided on the cover. In use, the cover is fixedly connected to the crucible body with screws, effectively preventing the crucible cover from loosening or falling off due to excessive internal pressure during the reaction, thus effectively preventing excessive powder splashing. An exhaust channel is formed between the cover and the groove to discharge the gas generated during the reaction. Simultaneously, the gas may carry a small amount of powder, which is then ejected through the exhaust channel. Therefore, a powder collection hood is provided on the outer periphery of the crucible body to collect the powder ejected through the exhaust channel, ensuring a safe experimental environment, preventing personnel inhalation, and facilitating cleaning after the experiment. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the crucible body and lid in an embodiment of the present utility model;
[0022] Figure 2 This is a schematic diagram of the structure of the powder collection hood in an embodiment of the present utility model;
[0023] In the diagram: 1. Crucible body; 2. Receiving cavity; 3. Threaded hole; 4. Groove; 5. Cover; 6. Fixing hole; 7. Screw; 8. Lower protective cover; 9. Storage slot; 10. Top cover. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0026] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale.
[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be further discussed and described in the description of the subsequent figures.
[0028] Example 1:
[0029] like Figures 1 to 2 As shown, this utility model provides a crucible for preventing powder splashing, comprising: a crucible body 1, a cover 5, and a powder collection hood; wherein, the crucible body 1 has an upward-opening receiving cavity 2, and the axis of the receiving cavity 2 is along a first direction ( Figure 1 The cavity 2 extends vertically (in the first direction), and a plurality of threaded holes 3 are provided on the end face of the opening end of the cavity 2. The axes of the plurality of threaded holes 3 all extend along the first direction. At least one threaded hole is also provided on the end face of the opening end of the cavity 2 along the second direction (in the vertical direction). Figure 1 A groove 4 extending horizontally in the middle (in the middle) is connected to the receiving cavity 2, and the second direction is perpendicular to the first direction; in this embodiment, the groove 4 is spaced apart from the threaded hole 3, so as to avoid the screw 7 interfering with the gas discharge.
[0030] The projected area of the cover 5 along the first direction is larger than the projected area of the inner envelope of the opening of the receiving cavity 2 along the first direction, so that the cover 5 can completely cover the opening of the receiving cavity 2, and facilitates the setting of fixing holes 6 corresponding one-to-one with the threaded holes 3. The fixing holes 6 can be optionally provided with threads according to the actual situation. After the cover 5 is assembled with the crucible body 1, the cover 5 is fixed to the opening end of the receiving cavity 2 by screws 7, and an exhaust channel is formed between the cover 5 and the groove 4 at the opening end of the receiving cavity 2; the exhaust channel is used to discharge the gas generated by the reaction in a timely manner.
[0031] The powder collection hood is located on the outer periphery of the crucible body 1. When the gas is discharged through the exhaust channel, a small amount of powder will be mixed in. The powder collection hood is used to collect the powder discharged through the exhaust channel.
[0032] This invention relates to a crucible for preventing powder splashing. Its overall structure is simple; the lid and crucible body are simply tightened with screws, making operation convenient and quick. Once the lid and crucible body are fixed together with screws, it effectively prevents the lid from loosening or falling off due to excessive internal pressure during the reaction, thus effectively preventing excessive powder splashing. An exhaust channel is formed between the lid and the groove to discharge the gas generated during the reaction. The gas may also carry a small amount of powder through the exhaust channel. Therefore, a powder collection hood is installed on the outer periphery of the crucible body to collect the powder ejected through the exhaust channel. This invention's crucible for preventing powder splashing does not involve any additional complex structures, is low in cost, and is easy to promote and apply.
[0033] In this embodiment, as Figure 2 As shown, the powder collection hood includes a lower cover 8, which has an upward-opening storage groove 9. The depth of the storage groove 9 is greater than the height of the crucible body 1, allowing the crucible body 1 to be placed inside. The powder collection hood has a simple structure; in use, the assembled crucible body 1 and cover 5 are simply placed directly into the storage groove 9. When the gas generated by the reaction carries a small amount of powder and is ejected through the exhaust channel, the lower cover 8 prevents the powder from dispersing into the external environment, and the powder is collected in the storage groove 9 for easy cleaning.
[0034] refer to Figure 2 The powder collection hood also includes an upper cover 10, which is placed directly on the opening of the lower cover 8 during use. By providing the upper cover 10, powder can be effectively prevented from spraying out of the lower cover 8, making cleaning easier.
[0035] In this embodiment, the sidewall thickness of the receiving cavity is ≥10mm, preferably 10mm, 12mm, or 15mm. This design facilitates the creation of threaded holes. The width of the groove is 5-10mm, preferably 5mm, 6mm, 7mm, or 8mm; the depth of the groove is 1-5mm, preferably 1mm, 2mm, or 3mm. This design allows for the timely discharge of gases generated during the reaction process and prevents excessive powder splashing. The thickness of the cover is ≥10mm, preferably 10mm, 11mm, 12mm, or 14mm, etc., which facilitates the creation of fixing holes 6. The shape and size of the crucible body, cover, and dust collection hood are not subject to excessive restrictions, as long as they meet the experimental requirements.
[0036] In this embodiment, for the preparation of niobium carbide, both the crucible body 1 and the lid 5 are made of graphite; the screw 7 is a graphite screw. In another embodiment, when other products need to be prepared, the crucible body, lid, and screw can be made of other materials, such as stainless steel.
[0037] In practice:
[0038] The crucible body has a cube-shaped outer contour, and the lid is a cube-shaped sheet. The receiving cavity is cube-shaped with an inner side length of 80mm and a side wall thickness of 10mm. Eight threaded holes are formed on the end face of the opening end of the receiving cavity. The lid has a side length of 100mm and a thickness of 10mm. The groove depth is 2mm, the length is consistent with the side wall thickness of the receiving cavity, and the width is 5mm. Eight fixing holes for inserting screws are formed on the lid, and the fixing holes correspond one-to-one with the threaded holes.
[0039] How to use:
[0040] The mixed niobium carbide raw materials were loaded into the crucible body, filling it to 80% of its volume. The crucible lid was then secured to the crucible body using graphite screws, ensuring a firm connection. The assembled graphite crucible was placed in a powder collection hood, and then placed together in a high-temperature furnace for heating and reaction according to the niobium carbide preparation process. After the reaction was completed, the crucible was allowed to cool to room temperature, the crucible lid was unscrewed, and the reaction product was removed.
[0041] Experimental results:
[0042] Experimental verification shows that the graphite crucible of this invention can effectively prevent powder splashing during the preparation of niobium carbide. Specifically, no powder splashing occurred under reaction conditions of 1500℃ and 3 hours. Compared with traditional screwless graphite crucibles, the powder loss rate is reduced by more than 90%.
[0043] Example 2:
[0044] This embodiment is the same as embodiment 1 except for the following technical solutions:
[0045] The crucible body has a rectangular outer contour, and the lid is a rectangular flat plate. The receiving cavity is rectangular, with a short side length of 80mm, a long side length of 100mm, a height of 80mm, and a sidewall thickness of 15mm. The lid has a short side length of 110mm, a long side length of 130mm, and a thickness of 12mm. The groove has a depth of 4mm, a length consistent with the sidewall thickness of the receiving cavity, and a width of 6mm, and is provided with 10 threaded holes and fixing holes.
[0046] How to use:
[0047] The mixed niobium carbide raw materials were loaded into the crucible body, filling it to 90% of its volume. The crucible lid was then secured to the crucible body using graphite screws, ensuring a firm connection. The assembled graphite crucible was placed in a powder collection hood, and then placed together in a high-temperature furnace for heating and reaction according to the niobium carbide preparation process. After the reaction was completed, the crucible was allowed to cool to room temperature, the crucible lid was unscrewed, and the reaction product was removed.
[0048] Experimental results:
[0049] Experimental verification shows that the graphite crucible of this invention can effectively prevent powder splashing during the preparation of niobium carbide. Specifically, no powder splashing occurred under the conditions of a reaction temperature of 1600℃ and a reaction time of 3 hours. Compared with traditional screwless graphite crucibles, the crucible of this invention reduces powder loss by more than 90%.
[0050] Example 3:
[0051] This embodiment is the same as embodiment 1 except for the following technical solutions:
[0052] The crucible body has a cylindrical outer contour, and the lid is a cylindrical sheet. The receiving cavity is cylindrical, with an internal diameter of 80 mm, a depth of 100 mm, and a sidewall thickness of 10 mm. The lid has a diameter of 100 mm and a thickness of 15 mm. The groove has a depth of 5 mm, a width of 6 mm, and a length consistent with the sidewall thickness of the receiving cavity, and is provided with 8 threaded holes and fixing holes.
[0053] How to use:
[0054] The mixed niobium carbide raw materials were loaded into the crucible body, filling it to 90% of its volume. The crucible lid was then secured to the crucible body using graphite screws, ensuring a firm connection. The assembled graphite crucible was placed in a powder protective cover and then placed in a high-temperature furnace for heating and reaction according to the niobium carbide preparation process. After the reaction was completed, the crucible was allowed to cool to room temperature, the lid was unscrewed, and the reaction product was removed.
[0055] Experimental results:
[0056] Experimental verification shows that the graphite crucible of this invention can effectively prevent powder splashing during the preparation of niobium carbide. Specifically, no powder splashing occurred under the conditions of a reaction temperature of 1600℃ and a reaction time of 3 hours. Compared with traditional screwless graphite crucibles, the powder loss rate of this invention is reduced by more than 90%.
[0057] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A crucible for preventing powder splashing, characterized in that, include: The crucible body has an upward-opening receiving cavity with the axis of the receiving cavity extending along a first direction. A plurality of threaded holes are provided on the end face of the opening end of the receiving cavity, and the axes of the plurality of threaded holes all extend along the first direction. At least one groove extending along a second direction is also provided on the end face of the opening end of the receiving cavity, and the groove communicates with the receiving cavity. The second direction is perpendicular to the first direction. The cover has a projected area along the first direction that is larger than the projected area of the inner envelope of the cavity opening along the first direction. The cover has a plurality of fixing holes that correspond one-to-one with the threaded holes, so that the cover is fixed to the opening end of the cavity by screws, and an exhaust channel is formed between the cover and the groove at the opening end of the cavity. A powder collection hood is disposed on the outer periphery of the crucible body to collect the powder discharged from the exhaust channel.
2. The crucible for preventing powder splashing according to claim 1, characterized in that: The powder collection hood includes a lower cover with an upward-opening storage slot. The depth of the storage slot is greater than the height of the crucible body, and the crucible body is placed in the storage slot.
3. The crucible for preventing powder splashing according to claim 2, characterized in that: The powder collection hood also includes an upper cover, which covers the opening of the lower cover.
4. The crucible for preventing powder splashing according to claim 1, characterized in that: The groove is spaced apart from the threaded hole.
5. The crucible for preventing powder splashing according to claim 1, characterized in that: The sidewall thickness of the receiving cavity is ≥10mm, the width of the groove is 5-10mm, and the depth of the groove is 1-5mm.
6. The crucible for preventing powder splashing according to claim 5, characterized in that: The thickness of the cover is ≥10mm.
7. The crucible for preventing powder splashing according to claim 1, characterized in that: The outer contour of the crucible body is cubic, the lid is cubic in shape, and the receiving cavity is cubic.
8. The crucible for preventing powder splashing according to claim 1, characterized in that: The outer contour of the crucible body is cuboid, the lid is cuboid sheet-shaped, and the receiving cavity is cuboid.
9. The crucible for preventing powder splashing according to claim 1, characterized in that: The outer contour of the crucible body is cylindrical, the cover is cylindrical and plate-shaped, and the receiving cavity is cylindrical.
10. The crucible for preventing powder splashing according to claim 1, characterized in that: Both the crucible body and the lid are made of graphite; the screws are graphite screws.