A crucible apparatus

Abstract

The utility model discloses a kind of crucible devices, comprising: crucible body, the inner side wall of the opening of crucible body is provided with internal thread along circumferential extension, the outer periphery of the opening of crucible body is provided with annular groove along circumferential extension;Crucible cover, crucible cover includes annular boss and annular flange, annular boss is set along circumferential extension in the lower surface of crucible cover, the outer side wall of annular boss is provided with external thread along circumferential extension, annular flange is set along circumferential extension in the lower surface of crucible cover, annular flange is set apart in parallel with annular boss, along first direction, the length of annular boss is greater than the length of annular flange, annular flange is located in annular groove.The utility model can be by the mechanical self-locking and axial compression force that the external thread of annular boss outer side wall is screwed with the internal thread of crucible body inner side wall, so that the annular flange of crucible cover and the annular groove of crucible body are closely fitted, form multistage sealing structure, to realize sealing effect under high temperature condition.

Description

Technical Field

[0001] This utility model relates to the field of crucible technology, and in particular to a crucible device. Background Technology

[0002] In the high-temperature sintering process of materials, crucible devices are often used to hold the materials and maintain the required atmosphere.

[0003] Existing crucible devices are typically simple in structure, with the crucible lid and body connected by simple gravity sealing or snap-fit. However, this type of structure has drawbacks. First, the locking force between the lid and body is insufficient, and vibration or internal pressure changes during kiln operation can easily cause the lid to loosen, leading to leakage of the internal sintering atmosphere and affecting product quality. Second, the sealing at the joint is poor, making it difficult to maintain a stable atmosphere. Furthermore, existing crucibles lack internal pressure regulation mechanisms, and at high temperatures, internal gas expansion can easily lead to pressure buildup, posing a risk of explosion. Utility Model Content

[0004] The purpose of this invention is to solve the technical problems of poor sealing performance and easy gas leakage caused by the insecure locking of the lid and body during high-temperature sintering of existing crucibles. This invention provides a crucible device that uses the mechanical self-locking and axial clamping force generated by the engagement of the external thread on the outer wall of the annular boss with the internal thread on the inner wall of the crucible body to ensure a tight fit between the annular flange of the crucible lid and the annular groove of the crucible body. A sealing ring is provided between the top surface of the annular flange and the bottom surface of the annular groove, forming a multi-stage sealing structure. This achieves a sealing effect under high-temperature conditions, preventing gas leakage from the crucible.

[0005] To solve the above-mentioned technical problems, the present invention discloses a crucible device, including a crucible body, wherein the inner sidewall of the opening of the crucible body is provided with an internal thread extending circumferentially, and the outer periphery of the opening of the crucible body is provided with an annular groove extending circumferentially; and a crucible cover, wherein the crucible cover includes an annular boss and an annular flange, the annular boss is provided on the lower surface of the crucible cover extending circumferentially, the outer sidewall of the annular boss is provided with an external thread extending circumferentially, the annular flange is provided on the lower surface of the crucible cover extending circumferentially, the annular flange and the annular boss are provided parallel and spaced apart, and along a first direction, the length of the annular boss is greater than the length of the annular flange, and the annular flange is located in the annular groove.

[0006] Using the above technical solution, the crucible lid is rotated and engaged with the crucible body. The external thread on the outer wall of the annular boss meshes with the internal thread on the inner wall of the crucible body, driving the crucible lid to move along a first direction. Simultaneously, the annular flange on the lower surface of the crucible lid enters the annular groove on the outer periphery of the opening of the crucible body. Under the axial clamping force generated by the threaded engagement, the annular flange fits against the bottom surface of the annular groove. The external and internal threads ensure a uniform distribution of clamping force, and the circumferentially continuous structure of the annular flange and the annular groove provides radial constraint, thereby achieving the sealing and locking of the crucible through structural fit.

[0007] According to another specific embodiment of the present invention, the crucible body and the crucible cover are detachably connected, and the internal thread of the crucible body is connected to the external thread of the crucible cover.

[0008] Using the above technical solution, the crucible body and the crucible cover are connected by internal and external threads, which allows the crucible body and the crucible cover to be separated and joined by rotation. At the same time, the design of internal and external threads ensures that the force is evenly distributed on the entire crucible body during connection.

[0009] According to another specific embodiment of the present invention, the top surface of the annular flange is located in the annular groove, the top surface of the annular flange and the bottom surface of the annular groove are spaced apart, and a sealing ring is provided between the top surface of the annular flange and the bottom surface of the annular groove, the sealing ring being made of a high-temperature resistant material.

[0010] Using the above technical solution, the sealing ring set between the top surface of the annular flange and the bottom surface of the annular groove is compressed during the process of the annular flange being pressed into the annular groove, filling the gap between the top surface of the annular flange and the bottom surface of the annular groove. At the same time, the high-temperature resistant material ensures that the sealing ring maintains its shape and elastic function in high-temperature environments.

[0011] According to another specific embodiment of the present invention, the compression rate of the sealing ring is between 15-25%.

[0012] By employing the above technical solution, the compression ratio of the sealing ring is limited to between 15% and 25%. This ensures that the sealing ring generates sufficient deformation to completely fill the mating gap when the annular flange is fully pressed into the annular groove. When the compression ratio is less than 15%, the deformation of the sealing ring is insufficient to completely fill the gap between the annular flange and the annular groove after the annular flange is fully pressed into the annular groove, leading to gas leakage along the gap. When the compression ratio is greater than 25%, the compressive stress on the sealing ring exceeds its elastic limit. After prolonged use in a high-temperature environment, the sealing ring undergoes permanent deformation and loses its resilience. After the crucible cools, the sealing ring cannot fill the gap between the annular flange and the annular groove due to loss of elastic deformation, affecting the sealing effect in subsequent uses.

[0013] According to another specific embodiment of the present invention, a positioning mark is provided at the center of the upper surface of the crucible lid.

[0014] By adopting the above technical solution, a positioning mark is set at the center of the upper surface of the crucible cover, so that when the machine captures the positioning mark from any angle, it can determine the center position of the crucible cover, providing a reference for the robot to control the accurate engagement of the external and internal threads, and ensuring the correct starting position of the threaded connection.

[0015] According to another specific embodiment of the present invention, the crucible lid is provided with multiple sets of positioning components, each set of positioning components including a positioning groove and a positioning hole, the positioning groove and the positioning hole being symmetrically distributed along the direction of the positioning mark on the edge of the crucible lid.

[0016] Using the above technical solution, multiple positioning components consisting of positioning grooves and positioning holes are symmetrically distributed around the edge of the crucible lid with the positioning mark as the center, forming multiple evenly distributed mechanical positioning points. The positioning grooves provide gripping points for the robot arm, and the positioning holes provide positioning. The two work together to ensure that the robot arm can grasp and control the rotation angle of the crucible lid.

[0017] According to another specific embodiment of the present invention, a gas channel is provided at the bottom of the crucible body, and the gas channel penetrates through the bottom of the crucible body.

[0018] Using the above technical solution, the gas channel is directly connected to the environment outside the crucible body and communicates with the inside of the crucible, forming a gas flow path that is not affected by the opening and closing state of the crucible lid. This bottom-mounted structure allows the gas expansion generated inside the crucible during heating to be directly discharged through this channel.

[0019] According to another specific embodiment of the present invention, a pressure relief valve is provided in the gas channel.

[0020] The above technical solution includes a pressure relief valve installed in the gas channel. This structure ensures that when the internal pressure of the crucible is within the normal operating range, the pressure relief valve keeps the gas channel closed. When the internal pressure rises to exceed the operating range, the pressure relief valve automatically opens, allowing the internal space of the crucible to connect with the external environment through the gas channel, thus forming a pressure relief path.

[0021] According to another specific embodiment of the present invention, the pressure relief valve is detachably connected to the gas passage.

[0022] The aforementioned technical solution utilizes a detachable connection structure between the pressure relief valve and the gas passage, allowing the valve to be removed from the gas passage as an independent component. This structure enables direct cleaning of accumulated dust within the gas passage, preventing blockage. Furthermore, this structure allows for the individual removal and replacement of a degraded pressure relief valve without replacing the entire crucible body.

[0023] According to another specific embodiment of the present invention, a filter is provided in the gas channel, and the filter is located above the pressure relief valve along the first direction.

[0024] By adopting the above technical solution, the filter plate installed on the upper side of the pressure relief valve in the gas channel can ensure that all gas flowing to the pressure relief valve through the gas channel must pass through the filter plate. The filter plate can allow gas to pass through while blocking solid particles, preventing particles from entering the pressure relief valve and obstructing gas discharge. Attached Figure Description

[0025] Figure 1 A cross-sectional view of the crucible device in an embodiment of this utility model is shown.

[0026] Figure 2 A cross-sectional view of the crucible lid in an embodiment of this utility model is shown.

[0027] Figure 3 The image shows a bottom view of the crucible lid in an embodiment of this utility model.

[0028] Figure 4 A top view of the crucible lid in an embodiment of this utility model is shown.

[0029] Figure 5 A cross-sectional view of the crucible body in an embodiment of this utility model is shown.

[0030] Icons: 1-Crucible assembly; 11-Inner wall of the opening of the crucible body; 12-Internal thread; 13-Outer periphery of the opening of the crucible body; 14-Annular groove; 15-Bottom surface of the annular groove; 20-Crucible lid; 21-Lower surface of the crucible lid; 22-Annular boss; 23-Outer wall of the annular boss; 24-External thread; 25-Annular flange; 26-Top surface of the annular flange; 27-Positioning mark; 28-Positioning groove; 29-Positioning hole; 30-Positioning component; 31-Upper surface of the crucible lid; 32-Edge of the crucible lid; 33-Sealing ring; 34-Bottom of the crucible body; 35-Gas passage; 36-Pressure relief valve; 37-Filter plate. Detailed Implementation

[0031] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0032] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the 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 the utility model.

[0034] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0036] refer to Figures 1 to 5This application provides a crucible device 1, including a crucible body 10 and a crucible lid 20. The inner wall 11 of the opening of the crucible body is provided with an internal thread 12 extending circumferentially, and the outer periphery 13 of the opening of the crucible body is provided with an annular groove 14 extending circumferentially. The crucible lid 20 includes an annular boss 22 and an annular flange 25. The annular boss 22 extends circumferentially and is disposed on the lower surface 21 of the crucible lid. The outer wall 23 of the annular boss extends circumferentially and is provided with an external thread 24. The annular flange 25 extends circumferentially and is disposed on the lower surface 21 of the crucible lid. The annular flange 25 and the annular boss 22 are arranged parallel to each other and spaced apart, along a first direction (…). Figure 1 and Figure 3 (As shown in the X direction), the length of the annular boss 22 is greater than the length of the annular flange 25, which is located within the annular groove 14. This arrangement, with the annular boss 22 and the annular flange 25 spaced parallel to each other, forms two sealing barriers on the inner wall 11 of the crucible body opening and the outer periphery 13 of the opening. The axial clamping force generated by the internal thread 12 and the external thread 24 ensures that the annular flange 25 and the annular groove 14 remain in close contact. The circumferentially continuous structure of the annular flange 25 and the annular groove 14 ensures that the sealing pressure is evenly distributed along the entire circumference, avoiding localized unpressurized areas. Simultaneously, the design that the length of the annular boss 22 is greater than that of the annular flange 25 allows the internal thread 12 and the external thread 24 to engage before the annular flange 25 and the annular groove 14 are fully pressed together, preventing resistance caused by premature contact between the annular flange 25 and the annular groove, which could affect the engagement of the external thread 24 and the internal thread 12.

[0037] When the crucible lid 20 is installed onto the crucible body 10 by rotation, the external thread 24 on the outer wall of the annular boss and the internal thread 12 on the inner wall of the crucible body opening engage with each other, driving the annular flange 25 to embed into the annular groove 14, so that the top surface 26 of the annular flange and the bottom surface 15 of the annular groove come into contact with each other to generate a pressing force, thereby achieving a double seal.

[0038] Further, refer to Figure 1 The crucible body 10 and the crucible lid 20 are detachably connected, with the internal thread 12 of the crucible body connected to the external thread 24 of the crucible lid. This configuration allows the crucible body 10 and the crucible lid 20 to be separated and joined by rotation. At the same time, the design of the internal thread 12 and the external thread 24 ensures that the force is evenly distributed across the entire crucible body 10 when the crucible body 10 and the crucible lid 20 are joined.

[0039] In some possible implementations, refer to Figure 1The top surface 26 of the annular flange is located within the annular groove 14, and the top surface 26 of the annular flange and the bottom surface 15 of the annular groove are spaced apart. A sealing ring 33 is provided between the top surface 26 of the annular flange and the bottom surface 15 of the annular groove. The sealing ring 33 is made of a high-temperature resistant material. This arrangement allows the sealing ring 33 to be compressed during the process of the annular flange 25 being pressed into the annular groove 14, filling the gap between the top surface 26 of the annular flange and the bottom surface 15 of the annular groove. At the same time, the use of a high-temperature resistant material allows the sealing ring 33 to maintain its shape and elasticity under high-temperature conditions.

[0040] It should be noted that the sealing ring in this embodiment can be made of ceramic fiber, Teflon, etc., and no specific limitation is made here.

[0041] Furthermore, the compression rate of the sealing ring 33 is between 15% and 25%. For example, in this embodiment, the compression rate of the sealing ring 33 is set at 12%, 14%, 15%, 18%, 21%, 24%, 25%, 26%, and 28%, respectively. When the compression rate of the sealing ring 33 is 15%, 18%, 21%, 24%, and 25%, the sealing ring 33 can fill the gap between the top surface 26 of the annular flange and the bottom surface 15 of the annular groove. However, when the compression rate is 12% and 14%, the deformation of the sealing ring 33 is insufficient to fill the gap between the top surface 26 of the annular flange and the bottom surface 15 of the annular groove. When the compression rate is 26% and 28%, the compressive stress borne by the sealing ring 33 exceeds its elastic limit. After prolonged use in a high-temperature environment, the sealing ring 33 will undergo permanent deformation and lose its elastic properties. After the crucible cools, the sealing ring 33 between the annular flange 25 and the annular groove 14 cannot fill the gap due to loss of elastic deformation, affecting the sealing effect in subsequent uses.

[0042] In some possible implementations, refer to Figure 3 A positioning mark 27 is provided at the center of the upper surface 31 of the crucible lid. This setting allows the machine to determine the center position of the crucible lid 20 when it captures the positioning mark 27 from any angle, providing a reference for the initial alignment of the robot arm to control the engagement of the external thread 24 and the internal thread 12, and ensuring that the starting position of the threaded connection is correct.

[0043] Further, refer to Figure 3 and Figure 4The crucible lid 20 is provided with multiple positioning components 30. Each positioning component 30 includes a positioning groove 28 and a positioning hole 29. The positioning groove 28 and the positioning hole 29 are symmetrically distributed along the center of the positioning mark 27 on the edge 32 of the crucible lid. With this arrangement, the positioning components 30, consisting of the positioning groove 28 and the positioning hole 29, are symmetrically distributed along the edge 32 of the crucible lid with the positioning mark 27 as the center, forming multiple evenly distributed mechanical positioning points. The positioning groove 28 provides a gripping point for the robot arm, and the positioning hole 29 provides positioning for the robot arm. The two work together to ensure that the robot arm can grasp and control the rotation angle of the crucible lid 20.

[0044] It should be noted that the positioning components in this embodiment consist of 3 sets, 6 positioning grooves, and 6 positioning holes, which are not specifically limited here.

[0045] In some possible implementations, refer to Figure 5 A gas channel 35 is provided at the bottom 34 of the crucible body, and the gas channel 35 extends through the bottom 34 of the crucible body. With this arrangement, the gas channel 35 is directly connected to the environment outside the crucible body 10, and at the same time communicates with the inside of the crucible, forming a gas flow path that is not affected by the opening and closing state of the crucible lid 20. This structure allows the gas expansion generated inside the crucible during heating to be directly discharged through the gas channel 35.

[0046] In some possible implementations, refer to Figure 5 The gas passage 35 is equipped with a pressure relief valve 36. With this configuration, when the internal pressure of the crucible is within the normal range, the pressure relief valve 36 keeps the gas passage 35 closed. When the internal pressure rises to a level exceeding the working range, the pressure relief valve 36 automatically opens, allowing the internal space of the crucible to communicate with the external environment through the gas passage 35, forming a gas pressure relief path.

[0047] Furthermore, the pressure relief valve 36 is detachably connected to the gas passage 35. This configuration allows the pressure relief valve 36 to be removed from the gas passage 35 as a separate component, enabling direct cleaning of accumulated dust within the gas passage 35 and preventing blockage. Simultaneously, this structure allows for the individual removal and replacement of a degraded pressure relief valve 36 without replacing the entire crucible body 10.

[0048] In some possible implementations, refer to Figure 5 A filter 37 is installed inside the gas passage 35, and along the first direction, the filter 37 is located above the pressure relief valve 36. This arrangement ensures that all gas flowing through the gas passage 35 to the pressure relief valve 36 must pass through the filter 37, which allows gas to pass through while blocking solid particles and dust, preventing particulate matter from entering the pressure relief valve 36 and obstructing gas discharge.

[0049] It should be noted that the filter in this embodiment can be a porous ceramic filter or the like, and no specific limitation is made here.

[0050] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A crucible apparatus, characterized in that, include: The crucible body has an internal thread extending circumferentially on the inner sidewall of the opening of the crucible body, and an annular groove extending circumferentially on the outer periphery of the opening of the crucible body. A crucible lid includes an annular boss and an annular flange. The annular boss extends circumferentially on the lower surface of the crucible lid, and its outer side wall extends circumferentially with an external thread. The annular flange extends circumferentially on the lower surface of the crucible lid and is parallel to and spaced apart from the annular boss. In a first direction, the length of the annular boss is greater than the length of the annular flange, and the annular flange is located in an annular groove.

2. The crucible apparatus as described in claim 1, characterized in that, The crucible body and the crucible lid are detachably connected, and the internal thread of the crucible body is connected to the external thread of the crucible lid.

3. The crucible apparatus as described in claim 1, characterized in that, The top surface of the annular flange is located inside the annular groove. The top surface of the annular flange and the bottom surface of the annular groove are spaced apart. A sealing ring is provided between the top surface of the annular flange and the bottom surface of the annular groove. The sealing ring is made of a high-temperature resistant material.

4. The crucible apparatus as described in claim 3, characterized in that, The compression rate of the sealing ring is between 15% and 25%.

5. The crucible apparatus as described in claim 1, characterized in that, A positioning mark is set in the center of the upper surface of the crucible lid.

6. The crucible apparatus as described in claim 5, characterized in that, The crucible lid is provided with multiple sets of positioning components. Each set of positioning components includes a positioning groove and a positioning hole. The positioning groove and the positioning hole are symmetrically distributed along the direction of the positioning mark on the edge of the crucible lid.

7. The crucible apparatus as claimed in claim 1, characterized in that, A gas channel is provided at the bottom of the crucible body, and the gas channel extends through the bottom of the crucible body.

8. The crucible apparatus as claimed in claim 7, characterized in that, A pressure relief valve is installed in the gas passage.

9. The crucible apparatus as claimed in claim 8, characterized in that, The pressure relief valve is detachably connected to the gas passage.

10. The crucible apparatus as claimed in claim 8, characterized in that, A filter is provided in the gas passage, and along the first direction, the filter is located above the pressure relief valve.

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