Anti-oxidation device suitable for molybdenum-based alloy reaction kettle

Abstract

The utility model relates to the technical field of reaction kettles, in particular to an anti-oxidation device suitable for a molybdenum-based alloy reaction kettle, which comprises a kettle body and a sealing cover arranged at the top of the kettle body, an air inlet valve port, a controller and an air outlet valve port are respectively arranged on the outer side of the kettle body, and an annular groove is arranged at the top of the kettle body. An annular groove is formed in the kettle body, a sealing compression spring and a contact ring are arranged in the annular groove, a reaction bin is formed in the kettle body, a ceramic composite layer is arranged in the reaction bin, and a connecting pipe and an oxygen sensor are arranged at the top of a sealing cover. Therefore, by utilizing the structural design of the air inlet valve port, the air outlet valve port, the controller, the oxygen sensor and the ceramic composite layer, the air inlet valve port is arranged at a high position to form gradient pressure difference with the air outlet valve port, full replacement of inert gas is ensured, the thermal stress strength of the kettle body can be increased by the ceramic composite layer, the anti-oxidation effect of the reaction kettle is further improved, and subsequent use is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction kettles, in particular to an anti-oxidation device suitable for a molybdenum-based alloy reaction kettle. Background Technique

[0002] The main strengthening methods of molybdenum-based alloys are solid solution strengthening, precipitation strengthening, and work hardening. Molybdenum alloy plates, strips, foils, tubes, rods, wires, and profiles can be obtained through plastic processing, and their strength can be improved and low-temperature plasticity can be improved. Molybdenum-based alloys are materials that can withstand higher temperatures. The high-temperature and high-pressure reaction kettle made of molybdenum-based alloys can theoretically withstand a temperature of 1200 °C, thus greatly increasing the temperature upper limit of the high-temperature and high-pressure reaction kettle and significantly expanding the conditions for reaction kettle simulation or synthesis. Molybdenum-based alloy reaction kettles are prone to react with oxygen in high-temperature or corrosive environments, often resulting in oxidation failure of materials.

[0003] An anti-oxidation device suitable for a molybdenum-based alloy reaction kettle currently in use. After retrieval, it is found that the utility model with the patent publication number CN219324198U discloses an anti-oxidation device suitable for a molybdenum-based alloy reaction kettle, including a molybdenum-based alloy reaction kettle. The molybdenum-based alloy reaction kettle is a pressure vessel with a cylindrical structure, and an anti-oxidation structure is arranged outside the molybdenum-based alloy reaction kettle; the anti-oxidation structure includes: a plurality of connection holes, a plurality of alignment grooves, a plurality of protective ring plates, two pairs of docking holes, and connection bolts; for the anti-oxidation device suitable for the molybdenum-based alloy reaction kettle, the anti-oxidation structure is arranged in a circular array outside the reaction kettle with a cylindrical structure. Through the matching of the alignment grooves with a socket structure and the protective ring plate structure, the docking holes on the protective ring plate can be aligned with the connection holes, and through the connection function of the connection bolts, the wrapping and protection of the reaction kettle shell can be realized.

[0004] Although the above patent solves the problems in the above background technique, there are still the following deficiencies: 1. The device is prone to microcrack propagation in the kettle body under long-term thermal cycling, resulting in a decrease in the anti-oxidation performance of the reaction kettle, which is not conducive to the subsequent use of the reaction kettle; 2. The rigid contact is adopted between the sealing cover and the kettle body in the device, and this contact method is prone to thermal expansion instability, resulting in a decrease in the sealing effect between the sealing cover and the kettle body and reducing the practical effect of the reaction kettle.

[0005] In summary, the utility model solves the problems in the above background technique by designing an anti-oxidation device suitable for a molybdenum-based alloy reaction kettle. Content of the Utility Model

[0006] The purpose of the utility model is to provide an anti-oxidation device suitable for a molybdenum-based alloy reaction kettle to solve the problems put forward in the above background technique.

[0007] To achieve the above object, the utility model provides the following technical solutions:

[0008] An anti-oxidation device applicable to a molybdenum-based alloy reactor, comprising a reactor body and a sealing cover arranged on the top of the reactor body. An air inlet valve port, a controller and an air outlet valve port are respectively arranged on the outer side of the reactor body. An annular groove is formed in the top of the reactor body. A sealing compression spring and a contact ring are respectively arranged inside the annular groove. A reaction chamber is formed inside the reactor body. A ceramic composite layer is arranged inside the reaction chamber. A metal cushion block is arranged at the bottom of the sealing cover. A connecting pipe and an oxygen sensor are respectively arranged on the top of the sealing cover.

[0009] As a preferred scheme of the utility model, the sealing cover is fixedly connected with the top of the reactor body through a plurality of bolts.

[0010] As a preferred scheme of the utility model, the bottom end of the sealing compression spring is embedded in the bottom surface of the annular groove, the top end of the sealing compression spring is fixedly contacted with the bottom of the contact ring, and the sealing compression springs are annularly and equidistantly distributed about the inner wall of the bottom end of the annular groove.

[0011] As a preferred scheme of the utility model, the outer surface of the metal cushion block is in interference fit with the inner wall of the annular groove. The metal cushion block is made of tungsten-nickel alloy material, and a conical sealing surface matched with the contact ring is arranged on its bottom surface.

[0012] As a preferred scheme of the utility model, the inner wall of the top end of the reaction chamber extends to the top surface of the reactor body, the inner wall of the bottom end of the connecting pipe extends to the bottom surface of the sealing cover, and the connecting pipe is communicated with the inside of the reaction chamber.

[0013] As a preferred scheme of the utility model, the detection end of the oxygen sensor penetrates through the top surface of the sealing cover and extends downward.

[0014] As a preferred scheme of the utility model, the controller is electrically connected with the air inlet valve port, the air outlet valve port and the oxygen sensor through wires respectively.

[0015] As a preferred scheme of the utility model, the position height of the air inlet valve port is higher than the position height of the air outlet valve port.

[0016] As a preferred scheme of the utility model, the ceramic composite layer is integrally hot-pressed and formed by an alumina and silicon carbide composite ceramic coating, and its thickness is 2 mm.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. In the present utility model, an anti-oxidation device applicable to a molybdenum-based alloy reactor is provided. Through the structural design of the air inlet valve port, air outlet valve port, controller, oxygen sensor, and ceramic composite layer, the oxygen concentration in the reaction chamber can be monitored under the combination of the oxygen sensor and the controller. The air inlet valve port is set at a high position to form a gradient pressure difference with the air outlet valve port to ensure full replacement of the inert gas. The ceramic composite layer can increase the thermal stress strength of the reactor body, thereby improving the anti-oxidation effect of the reactor and being beneficial for subsequent use.

[0019] 2. In the present utility model, an anti-oxidation device applicable to a molybdenum-based alloy reactor is provided. Through the structural design of the sealing compression spring, contact ring, and metal spacer, under the elastic support of the sealing compression spring on the contact ring, the metal spacer is pressed against the contact ring through the conical sealing surface, thereby achieving the purpose of improving the sealing effect of the sealing cover and ensuring the practical effect of the reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 is an exploded structural diagram of the contact ring and the annular groove of the present utility model;

[0022] Figure 3 is an exploded structural diagram of the metal spacer and the sealing cover of the present utility model.

[0023] In the figure: 1, reactor body; 2, sealing cover; 201, metal spacer; 202, connecting pipe; 203, oxygen sensor; 3, air inlet valve port; 4, controller; 5, air outlet valve port; 6, annular groove; 601, sealing compression spring; 602, contact ring; 7, reaction chamber; 701, ceramic composite layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive. All technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments.

[0026] For the embodiments, please refer to Figures 1-3 , the present utility model provides a technical solution:

[0027] An anti-oxidation device suitable for a molybdenum-based alloy reaction kettle, including a kettle body 1 and a sealing cover 2 provided on the top of the kettle body 1. An annular groove 6 is opened at the top of the kettle body 1. A sealing compression spring 601 and a contact ring 602 are respectively arranged inside the annular groove 6. A metal cushion block 201 is arranged at the bottom of the sealing cover 2, and a connecting pipe 202 is arranged at the top of the sealing cover 2;

[0028] Specifically, the sealing cover 2 is fixedly connected to the top of the kettle body 1 through a plurality of bolts;

[0029] In this implementation scheme, the setting of the sealing cover 2 is mainly used to contact the kettle body 1, and the bolts can fix the sealing cover 2 and the kettle body 1.

[0030] Specifically, the bottom end of the sealing compression spring 601 is embedded in the bottom surface of the annular groove 6, the top end of the sealing compression spring 601 is fixedly in contact with the bottom of the contact ring 602, the sealing compression springs 601 are annularly and equidistantly distributed with respect to the inner wall of the bottom end of the annular groove 6, the outer surface of the metal cushion block 201 is in interference fit with the inner wall of the annular groove 6, the metal cushion block 201 is made of tungsten-nickel alloy material, and its bottom surface is provided with a conical sealing surface that cooperates with the contact ring 602;

[0031] In this implementation scheme, the setting of the metal cushion block 201 is mainly used to contact the annular groove 6, so that the metal cushion block 201 enters the annular groove 6. The annularly and equidistantly distributed sealing compression springs 601 can evenly support the contact ring 602, so that the bottom of the contact ring 602 receives an elastic supporting force. Under the action of this elastic supporting force, the contact ring 602 and the conical surface at the bottom of the metal cushion block 201 can form a sealed extrusion contact, ensuring the sealing effect between the contact ring 602 and the metal cushion block 201, improving the sealing performance between the sealing cover 2 and the kettle body 1, effectively avoiding the situation that the sealing member fails due to high temperature in the kettle body 1, and being beneficial to subsequent use.

[0032] Specifically, the inner wall at the top of the reaction chamber 7 extends to the top surface of the kettle body 1, the inner wall at the bottom of the connecting pipe 202 extends to the bottom surface of the sealing cover 2, and the connecting pipe 202 is internally connected to the reaction chamber 7;

[0033] In this embodiment, the connecting pipe 202 adopts a quick self-sealing joint structure. The connecting pipe 202 is mainly used to connect with the external pipeline. The inner cavity of the connecting pipe 202 directly leads to the reaction chamber 7, thereby ensuring that the material can enter the reaction chamber 7, which is beneficial for subsequent use.

[0034] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 3 , an air inlet valve port 3, a controller 4 and an air outlet valve port 5 are respectively arranged on the outer side of the kettle body 1. A reaction chamber 7 is arranged inside the kettle body 1. A ceramic composite layer 701 is arranged inside the reaction chamber 7. An oxygen sensor 203 is arranged on the top of the sealing cover 2;

[0035] Specifically, the detection end of the oxygen sensor 203 penetrates through the top surface of the sealing cover 2 and extends downward. The controller 4 is electrically connected to the air inlet valve port 3, the air outlet valve port 5 and the oxygen sensor 203 through wires respectively. The position height of the air inlet valve port 3 is higher than the position height of the air outlet valve port 5;

[0036] In this embodiment, the oxygen sensor 203 is mainly used to monitor the oxygen concentration inside the reaction chamber 7 in real time and feedback the measured data to the controller 4 through wires. The controller 4 is mainly used to open or close the air inlet valve port 3 and the air outlet valve port 5. The air inlet valve port 3 is mainly used to connect with the nitrogen delivery pipe. Once the value measured by the oxygen sensor 203 exceeds the set threshold, the controller 4 can open the air inlet valve port 3 and the air outlet valve port 5, so that nitrogen enters the reaction chamber 7 through the air inlet valve port 3, while oxygen is discharged through the air outlet valve port 5. The air inlet valve port 3 and the air outlet valve port 5 are respectively located at the upper and lower positions on the outer side of the kettle body 1. Through the linkage of the controller 4 and the oxygen sensor 203, the automatic replacement of inert gas is realized, effectively reducing the oxygen content in the reaction chamber 7 and meeting the needs of the users.

[0037] Specifically, the ceramic composite layer 701 is integrally hot-pressed and formed by alumina and silicon carbide composite ceramic coating, and its thickness is 2 mm;

[0038] In this embodiment, the reaction chamber 7 is provided with a ceramic composite layer 701 with a thickness of 2 mm and integrally hot-pressed and formed by alumina and silicon carbide, which can improve the high-temperature resistance and oxidation resistance of the kettle body 1, thereby improving the anti-oxidation effect of the device.

[0039] The working process of the present utility model: When using an anti-oxidation device applicable to a molybdenum-based alloy reactor, first move the sealing cover 2 to make the sealing cover 2 close to the reactor body 1, and fasten the sealing cover 2 to the top surface of the reactor body 1 through bolts. During the fastening process, the metal cushion block 201 gradually fits into the annular groove 6 and approaches the contact ring 602 until the metal cushion block 201 is completely fitted with the annular groove 6. At this time, the sealing compression spring 601 is in a compressed state and applies an upward elastic pre-pressure to the bottom of the contact ring 602. Under the application of the elastic pre-pressure, it is ensured that the contact ring 602 forms a sealed extrusion contact with the bottom of the metal cushion block 201, thereby improving the sealing effect between the sealing cover 2 and the reactor body 1, which is beneficial for subsequent use. Then, connect the connecting pipe 202 to the external material conveying pipe, and start the oxygen sensor 203 through the controller 4. The oxygen sensor 203 then monitors the oxygen content in the reaction chamber 7 in real time. Once the oxygen concentration exceeds the set threshold, the controller 4 opens the intake valve port 3. At this time, nitrogen enters the reaction chamber 7 through the nitrogen conveying pipe and the intake valve port 3, and at the same time, the outlet valve port 5 is opened, and the oxygen-containing gas sinks and is discharged through the outlet valve port 5 until the oxygen concentration measured by the oxygen sensor 203 reaches the standard, thus realizing the automatic replacement of the gas. Then, the material enters the reaction chamber 7 and undergoes a high-temperature reaction. During the high-temperature reaction process, the ceramic composite layer 701 can isolate the contact between oxygen and the molybdenum-based alloy, improving the high-temperature resistance and anti-oxidation performance of the reactor body 1, meeting the anti-oxidation requirements of the reactor, and being beneficial for subsequent use.

[0040] It should be noted that in this article, terms such as "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without more limitations, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0041] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An anti-oxidation device suitable for a molybdenum-based alloy reactor, comprising a reactor body (1) and a sealing cover (2) arranged on the top of the reactor body (1), characterized in that: An air inlet valve port (3), a controller (4) and an air outlet valve port (5) are respectively arranged on the outside of the kettle body (1); an annular groove (6) is provided on the top of the kettle body (1); a sealing compression spring (601) and a contact ring (602) are respectively arranged inside the annular groove (6); a reaction chamber (7) is provided inside the kettle body (1); a ceramic composite layer (701) is arranged inside the reaction chamber (7); a metal pad (201) is provided on the bottom of the sealing cover (2); and a connecting pipe (202) and an oxygen sensor (203) are respectively arranged on the top of the sealing cover (2); The bottom end of the sealing compression spring (601) is embedded in the bottom end surface of the annular groove (6), the top end of the sealing compression spring (601) is in fixed contact with the bottom of the contact ring (602), the sealing compression spring (601) is distributed in an annular manner with equal distances with respect to the bottom end inner wall of the annular groove (6), the outer surface of the metal pad (201) is in engagement contact with the inner wall of the annular groove (6), the metal pad (201) is made of tungsten-nickel alloy material, and its bottom surface is provided with a conical sealing surface that matches the contact ring (602).

2. The anti-oxidation device suitable for a molybdenum-based alloy reactor according to claim 1, characterized in that: The sealing cover (2) is fixedly connected to the top of the kettle body (1) via a plurality of bolts.

3. The anti-oxidation device suitable for a molybdenum-based alloy reactor according to claim 1, characterized in that: The top inner wall of the reaction chamber (7) extends to the top surface of the kettle body (1), the bottom inner wall of the connecting pipe (202) extends to the bottom surface of the sealing cover (2), and the connecting pipe (202) is connected to the interior of the reaction chamber (7).

4. The anti-oxidation device suitable for a molybdenum-based alloy reactor according to claim 1, characterized in that: The detection end of the oxygen sensor (203) penetrates the top surface of the sealing cover (2) and extends downward.

5. The anti-oxidation device suitable for a molybdenum-based alloy reactor according to claim 1, characterized in that: The controller (4) is electrically connected to the air inlet valve port (3), the air outlet valve port (5), and the oxygen sensor (203) respectively through wires.

6. The anti-oxidation device suitable for a molybdenum-based alloy reactor according to claim 1, characterized in that: The height of the air inlet valve port (3) is higher than the height of the air outlet valve port (5).

7. The anti-oxidation device suitable for a molybdenum-based alloy reactor according to claim 1, characterized in that: The ceramic composite layer (701) is formed by hot pressing an aluminum oxide and silicon carbide composite ceramic coating in one piece, and has a thickness of 2 mm.

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