Novel crucible cover and crucible

Abstract

The utility model discloses a novel crucible cover and a crucible, and relates to the field of heating reaction containers, the novel crucible cover comprises a cover body, the lower end of the cover body is provided with a plurality of abutting blocks along the radial direction in a sliding manner; a heat conduction box is installed at the lower end of the cover body, a first piston is slidably assembled in an inner cavity of the heat conduction box in the vertical direction, the inner cavity of the heat conduction box is divided into two closed spaces, namely a first cavity and a second cavity, which are independent from each other by the first piston, and the first cavity is filled with gas; a connecting rod is installed at one end of the abutting block, a second piston is installed at the other end of the connecting rod, the second piston is slidably assembled in an inner cavity of a guide pipe, the guide pipe is fixedly installed on the heat conduction box and communicates with a second cavity, and the second cavity is filled with liquid; the heat conduction box is used for conducting the temperature in the crucible, and the abutting block moves in the direction away from the cover body along with temperature rise. The abutting block is driven to move under the high-temperature condition in the crucible, and self-adaptive adjustment of the sealing degree between the cover body and the pot body is achieved.

Description

Technical Field

[0001] The utility model relates to the field of heating reaction vessels, and particularly relates to a novel crucible cover and a crucible. Background Art

[0002] A crucible is a high-temperature-resistant container, which is widely used in the melting and heat treatment of metals, glass, and ceramics. It is usually made of graphite, ceramics, or metal materials, and has good heat resistance and chemical corrosion resistance. During the heating and temperature rise process of the crucible, the sealing function of the crucible cover is crucial. Sealing the crucible cover can effectively prevent external air from entering the interior of the crucible, avoid the influence of oxidation reaction on the molten material, and thus ensure the chemical purity and material quality during the heating process. In addition, the sealed crucible cover can also prevent heat dissipation, improve the heating efficiency, ensure uniform heating of the material, and achieve an ideal melting and heating effect. By sealing the crucible cover, the escape of volatile substances can also be reduced, protecting the safety of operators and the cleanliness of the working environment. Based on this, we propose a novel crucible cover and a crucible. Content of the Utility Model

[0003] In order to solve the technical problems existing in the above-mentioned prior art, the utility model provides a novel crucible cover and a crucible.

[0004] To achieve the above object, the utility model provides the following technical solution: a novel crucible cover, including a cover body, and a plurality of abutting blocks are slidably assembled along the radial direction at the lower end of the cover body; a heat conduction box is installed at the lower end of the cover body, a first piston is slidably assembled in the inner cavity of the heat conduction box along the vertical direction, the first piston divides the inner cavity of the heat conduction box into two independent closed spaces, namely a first chamber and a second chamber, and a gas is filled in the first chamber; one end of the abutting block is installed with a connecting rod, the other end of the connecting rod is installed with a second piston, the second piston is slidably assembled in the inner cavity of a guide tube, the guide tube is fixedly installed on the heat conduction box and communicates with the second chamber, and a liquid is filled in the second chamber; the heat conduction box is used for conducting the temperature inside the crucible, and as the temperature rises, the abutting blocks move away from the cover body.

[0005] Preferably, several guide discs are installed inside the guide tube, and the connecting rod movably penetrates through the guide discs.

[0006] Preferably, the lower end surface of the heat conduction box is an outwardly convex arc surface, and the lower end surface of the first piston is an arc surface adapted to the lower end surface of the heat conduction box.

[0007] Preferably, the first piston is of a hollow structure.

[0008] Preferably, a through hole is provided on the cover body, and a sealing plate is slidably assembled along the vertical direction above the through hole. As the temperature inside the crucible rises, the sealing plate moves away from the through hole.

[0009] Preferably, a driving block is integrally formed at the upper end of the abutting block. The upper end of the driving block is provided with an inclined surface that is lower on the outside and higher on the inside. A connecting rod is installed at the lower end of the sealing plate. The connecting rod movably penetrates through the cover body, and a spherical block is installed at the lower end of the connecting rod.

[0010] The present utility model also proposes a crucible, which includes a pot body and a novel crucible cover mentioned above.

[0011] Preferably, a receiving groove adapted to the abutting block is formed on the inner wall of the pot body.

[0012] Compared with the prior art, the present utility model provides a novel crucible cover, which has the following beneficial effects:

[0013] (1) After a high-temperature and high-pressure environment is formed inside the crucible, the abutting blocks radially distributed along the cover body move towards the direction close to the pot body until the abutting blocks are in close contact with the pot body, increasing the sealing firmness between the cover body and the pot body, reducing the escape of volatile substances, and protecting the safety of the operator and the cleanliness of the working environment.

[0014] (2) By providing through holes for discharging the high-temperature and high-pressure gas inside the crucible, the situation of pressure buildup in the crucible is reduced. And when the temperature inside the crucible is in a relatively low range, the through holes are in a closed state, preventing heat dissipation and improving the heating efficiency.

[0015] (3) It is beneficial for the sealing cover to control the open state of the through holes. When the temperature inside the crucible is in a relatively low range, the through holes are in a closed state. When the temperature inside the crucible continues to rise, the through holes are in an open state, and the distance between the sealing cover and the cover body gradually increases, adapting to the discharge of gas under high-temperature and high-pressure conditions.

[0016] (4) By providing a low groove to cooperate with the abutting block to lock the cover body, the cover body can only be opened when the temperature inside the crucible drops, further improving the operation safety. Description of the Drawings

[0017] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0018] Figure 1 It is a schematic diagram of the state of the entire novel crucible cover at normal temperature in the embodiment;

[0019] Figure 2 It is a schematic diagram of the state of the entire novel crucible cover at a set temperature in the embodiment;

[0020] Figure 3 It is a schematic cross-sectional structure diagram of the piston disc in the embodiment;

[0021] Figure 4Schematic diagram of the distribution of each structure on the abutting block in the embodiment;

[0022] Figure 5 is Figure 2 an enlarged schematic diagram of area A in;

[0023] Figure 6 Schematic diagram of the structure of the entire crucible in the embodiment.

[0024] In the figure: 1. Cover body; 2. Heat conduction box; 3. First piston; 4. First chamber; 5. Second chamber; 6. Abutting block; 61. Connecting rod; 62. Second piston; 63. Guide tube; 64. Guide disc; 7. Through hole; 71. Driving block; 72. Inclined surface; 73. Ball block; 74. Link rod; 75. Sealing plate; 8. Pot body; 81. Abutting groove. Specific implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Usually, the components of the embodiments of the present invention described and shown here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but only represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0026] This embodiment proposes a new type of crucible cover. As Figures 1 to 6 shown, it includes a cover body 1. A plurality of positioning rings (not shown in the figure) are installed at the lower end of the cover body 1. When the cover body 1 is buckled on the crucible, the positioning rings just abut against the inner wall of the crucible. In actual application, a relatively closed space is formed between the crucible and the cover body 1. Since the crucible is heated and a high-temperature and high-pressure environment is formed inside it, if the cover body 1 falls off, it is easy to cause the molten material in the crucible to splash out, or the escape of volatile substances to cause harm to the operator and other safety problems. Therefore, in the present invention, a plurality of abutting blocks 6 are slidably assembled along the radial direction at the lower end of the cover body 1. When the cover body 1 is buckled on the crucible, the abutting blocks 6 move along the radial direction of the cover body 1 away from the cover body 1 until they are in close contact with the inner wall of the pot body 8, increasing the sealing firmness between the cover body 1 and the crucible.

[0027] Based on the above solution, the utility model utilizes the high-temperature condition inside the crucible to drive the movement of the abutting block 6. Specifically, a heat-conducting box 2 is installed at the lower end of the cover body 1. The heat-conducting box 2 is made of heat-conducting metal. A first piston 3 is slidably assembled in the inner cavity of the heat-conducting box 2 along the vertical direction. The first piston 3 divides the inner cavity of the heat-conducting box 2 into two independent closed spaces, namely a first chamber 4 and a second chamber 5. The first chamber 4 is filled with gas. Since the gas expands when heated, it will push the first piston 3 to move upward; the gas is a gas with a thermal expansion coefficient greater than that of air, simple source and safe to use; one end of the abutting block 6 is installed with a connecting rod 61, and the other end of the connecting rod 61 is installed with a second piston 62. The second piston 62 is slidably assembled in the inner cavity of the guiding tube 63. The guiding tube 63 is fixedly installed on the heat-conducting box 2 and communicates with the second chamber 5. The second chamber 5 is filled with liquid, and the liquid serves as a transmission medium. When the heat-conducting box 2 moves upward, the liquid pushes the second piston 62 to move away from the heat-conducting box 2, thereby achieving the purpose of moving the abutting block 6 toward the direction close to the pot body 8. It should be noted that since the thermal expansion coefficient of the liquid is much smaller than that of the gas, the expansion of the liquid can be ignored.

[0028] Among them, the connecting rod 61 is distributed along the radial direction of the cover body 1; in order to improve the stability of the second chamber 5 during movement, several guiding discs 64 are installed inside the guiding tube 63, and the connecting rod 61 movably penetrates through the guiding discs 64. Through the guiding action of the guiding discs 64, the second piston 62 can only move along the radial direction of the cover body 1, and the guiding discs 64 also limit the movement stroke of the abutting block 6 to prevent the abutting block 6 from detaching from the guiding tube 63.

[0029] Based on the above solution, in order to increase the heat-absorbing area of the heat-conducting box 2, the lower end surface of the heat-conducting box 2 is designed as a convex arc surface; similarly, the lower end surface of the first piston 3 is designed as an arc surface adapted to the lower end surface of the heat-conducting box 2 to ensure that the distance between the lower end surface of the first piston 3 and the bottom wall of the inner cavity of the cover body 1 is approximately equal.

[0030] In order to reduce the influence of the self-weight of the first piston 3 on its upward movement, the first piston 3 is designed as a hollow structure.

[0031] In addition, in order to prevent the gas in the first chamber 4 from entering the second chamber 5 during the movement of the first piston 3, a sealing ring is installed at the edge of the first piston 3, and the liquid filled in the second chamber 5 also plays a role of liquid sealing, further improving the sealing performance.

[0032] When the crucible is in a high-temperature and high-pressure state, in order to avoid pressure buildup, a through hole 7 is generally designed on the cover body 1 for ventilation. However, when the temperature inside the crucible is relatively low, if the inner cavity of the crucible is in communication with the external environment, the inner cavity of the crucible is in an atmospheric pressure environment, which is not conducive to the formation of a high-temperature and high-pressure environment and reduces the production efficiency. Therefore, a sealing plate 75 that is slidably assembled in the vertical direction is provided above the through hole 7. When the inner cavity of the crucible is in a high-temperature and high-pressure state, the sealing plate 75 moves upward in the vertical direction, causing the through hole 7 to open, facilitating the discharge of the high-temperature and high-pressure gas inside the pot body 8, reducing the probability of danger occurring, and improving safety.

[0033] Based on the above solution, in the present utility model, the movement of the abutting block 6 is used to drive the movement of the sealing plate 75 in the vertical direction. Specifically, a driving block 71 is integrally formed at the upper end of the abutting block 6, and an inclined surface 72 with a lower outer and higher inner height is provided at the upper end of the driving block 71. A connecting rod 74 is installed at the lower end of the sealing plate 75, the connecting rod 74 movably penetrates the cover body 1, and a spherical block 73 is installed at the lower end of the connecting rod 74. The driving block 71 moves synchronously with the abutting block 6. As the temperature inside the crucible rises, the driving block 71 moves towards the direction close to the spherical block 73 until the spherical block 73 comes into contact with the inclined surface 72. Under the guiding action of the inclined surface 72, the connecting rod 74 moves upward in the vertical direction, gradually increasing the distance between the sealing plate 75 and the cover body 1, making the inner cavity of the crucible communicate with the external environment, and facilitating the gradual discharge of the high-temperature and high-pressure gas inside the crucible.

[0034] The present utility model also proposes a crucible, which includes a pot body 8. An abutting groove 81 adapted to the abutting block 6 is formed on the inner wall of the pot body 8. When the abutting block 6 moves towards the direction close to the pot body 8, the abutting block 6 is inserted into the abutting groove 81, making the cover body 1 unable to be opened. As long as the temperature inside the pot body 8 drops to the safe range, at this time, the volume of the gas expanding in the first chamber 4 decreases, resulting in a decrease in the acting force exerted on the abutting block 6. At this time, when the cover body 1 is pulled upward, due to the existence of the inclined surface 72, the upward pulling force is decomposed into a thrust force towards the direction close to the heat conduction box 2, causing the abutting block 6 to move away from the abutting groove 81, and at this time, the cover body 1 can be opened, improving the operation safety.

[0035] In the description of the present utility model, the terms "first", "second", "another", and "yet another" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0037] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A novel crucible cover, comprising a cover body (1), characterized in that: The lower end of the cover body (1) is slidably mounted with a plurality of stoppers (6) along its radial direction; the lower end of the cover body (1) is mounted with a heat conduction box (2); the inner cavity of the heat conduction box (2) is slidably mounted with a first piston (3) along the vertical direction; the first piston (3) divides the inner cavity of the heat conduction box (2) into two independent closed spaces, a first chamber (4) and a second chamber (5); the interior of the first chamber (4) is filled with gas; a connecting rod (61) is mounted at one end of the stopper (6); a second piston (62) is mounted at the other end of the connecting rod (61); the second piston (62) is slidably mounted in the inner cavity of a guide tube (63); the guide tube (63) is fixedly mounted on the heat conduction box (2) and communicates with the second chamber (5); the interior of the second chamber (5) is filled with liquid; the heat conduction box (2) is used to conduct the temperature in the crucible; as the temperature rises, the stopper (6) moves in a direction away from the cover body (1).

2. A novel crucible cover according to claim 1, characterized in that: A plurality of guide plates (64) are installed inside the guide tube (63), and the connecting rod (61) movably passes through the guide plates (64).

3. A novel crucible cover according to claim 1, characterized in that: The lower end surface of the heat conduction box (2) is an outwardly convex arc surface, and the lower end surface of the first piston (3) is an arc surface that matches the lower end surface of the heat conduction box (2).

4. A novel crucible cover according to claim 1, characterized in that: The first piston (3) has a hollow structure.

5. The novel crucible cover according to claim 1 is characterized in that: A through hole (7) is provided on the cover body (1), and a sealing plate (75) is provided above the through hole (7) and is slidably assembled in a vertical direction. As the temperature in the crucible increases, the sealing plate (75) moves in a direction away from the through hole (7).

6. A novel crucible cover according to claim 5, characterized in that: The upper end of the stop block (6) is integrally formed with a driving block (71), the upper end of the driving block (71) is provided with an inclined surface (72) which is lower outside and higher inside, the lower end of the sealing plate (75) is provided with a connecting rod (74), the connecting rod (74) movably passes through the cover body (1), and the lower end of the connecting rod (74) is provided with a ball block (73).

7. A crucible, characterized in that: It comprises a pot body (8) and a new type of crucible cover as claimed in claim 6.

8. A crucible according to claim 7, characterized in that: The inner wall of the pot body (8) is provided with a stop groove (81) adapted to the stop block (6).

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