CN-224215830-U - In-situ atmosphere quenching tube furnace

Abstract

The utility model belongs to the technical field of quenching tube furnaces, and particularly relates to an in-situ atmosphere quenching tube furnace and a quenching method thereof. The in-situ atmosphere quenching tube furnace comprises a high-temperature furnace body, a furnace tube penetrates through the high-temperature furnace body, the front end of the furnace tube is connected with a T-shaped tee joint, a sample groove with a long handle is arranged in the horizontal direction of the T-shaped tee joint, the vertical direction of the T-shaped tee joint is an air inlet end, the rear part of the furnace tube is vertically provided with a quenching tank interface, a quenching tank is connected below the quenching tank interface, the rear end of the furnace tube is an air outlet end, and the air outlet end is connected with a hose. According to the utility model, through a fully-sealed operation chain and precise time sequence control, the full-flow atmosphere protection from high-temperature treatment to ultra-fast cooling of the nano material is realized, the grain boundary oxidation and element segregation are effectively inhibited, the quenching treatment of the material extremely sensitive to oxygen, water and carbon dioxide is supported, and the problem of material decomposition caused by short air exposure of the traditional open or semi-closed equipment is solved.

Inventors

• JIN XIAOJING
• PENG YING
• CHEN LONGWEN
• LIU FENG
• CHEN YANWU

Assignees

• 顺德职业技术大学

Dates

Publication Date

20260508

Application Date

20250528

Claims (9)

1. 1. The in-situ atmosphere quenching tube furnace comprises a high-temperature furnace body (1), wherein a furnace tube (2) with the length larger than that of the furnace body (1) is penetrated in the high-temperature furnace body (1), and is characterized in that the front end of the furnace tube (2) is connected with a T-shaped tee joint (3), a sample groove (4) with a long handle is arranged in the horizontal direction of the T-shaped tee joint (3), the vertical direction of the T-shaped tee joint (3) is an air inlet end, a quenching tank interface (5) is vertically arranged at the rear part of the furnace tube (2), a quenching tank (6) is connected below the quenching Chi Jiekou (5), the rear end of the furnace tube (2) is an air outlet end (7), and the air outlet end (7) is connected with a hose (8) for connecting a vacuum pump or leading out air.
2. 2. The in-situ atmosphere quenching tube furnace according to claim 1, wherein the air inlet end is provided with a high-precision barometer (9) and an air inlet valve (10) in sequence from bottom to top, and the air outlet end (7) is provided with an air outlet valve (11).
3. 3. The in-situ atmosphere quenching tube furnace of claim 1, wherein interface surfaces of the quenching Chi Jiekou and the quenching bath 6 are frosted surfaces, the quenching Chi Jiekou (5) and the quenching bath 6 are connected in a sealing way through a locking device 12, and the length of a sample notch at the front end of the sample groove 4 with the long handle is smaller than the diameter of the quenching Chi Jiekou (5).
4. 4. An in-situ atmosphere quenching tube furnace as claimed in claim 3, wherein the locking means (12) is a clamp or spring clamp type sealing clamp.
5. 5. The in-situ atmosphere quenching tube furnace according to claim 1, wherein a quenching medium injection port (13) is arranged on the side wall of the upper part of the quenching tank (6), and a headspace high-temperature-resistant rubber pad cover (14) connected in a spiral structure is arranged on the quenching medium injection port (13).
6. 6. The in-situ atmosphere quenching tube furnace as claimed in claim 1, wherein the front end of the T-shaped tee joint (3) in the horizontal direction is provided with a sealing cover (15), the long handle of the long-handle sample groove (4) penetrates through a central hole of the sealing cover (15) and can rotate freely, O-shaped sealing rings are arranged on the inner sides of the contact positions of the long handle of the long-handle sample groove (4) and the sealing cover (15), the length of the long-handle sample groove (4) is larger than or equal to the length of the furnace tube (2), and positioning scale marks corresponding to the temperature equalizing area in the middle of the furnace tube (2) are arranged on the long handle of the long-handle sample groove (4).
7. 7. The in-situ atmosphere quenching tube furnace as claimed in claim 1, wherein the gas inlet end is connected to a source (16) of high purity gas.
8. 8. The in-situ atmosphere quenching tube furnace according to claim 1, wherein a lifting table (17) for supporting the quenching bath (6) in an auxiliary manner is arranged below the quenching bath (6).
9. 9. The in-situ atmosphere quenching tube furnace according to claim 1, wherein the rear end of the T-shaped tee joint (3) is connected with the front end of the furnace tube (2) through a first sealing flange (18), and the air outlet end (7) is connected with the rear end of the furnace tube (2) through a second sealing flange (19) to realize sealing.

Description

In-situ atmosphere quenching tube furnace Technical Field The utility model belongs to the technical field of quenching tube furnaces, and particularly relates to an in-situ atmosphere quenching tube furnace. Background The quenching technology is widely applied in the field of traditional metal heat treatment as a heat treatment technology for regulating and controlling the microstructure of a material through rapid cooling. In recent years, with the rising demand for preparing nano materials, quenching technology is gradually introduced into development of advanced materials such as nano catalysts, functional ceramics and the like. Research shows that the quenching process can realize the accurate regulation and control of the interface characteristic of the nano material surface by rapidly cooling and fixing the high-temperature metastable state structure. For example, quenching promotes metal ion doping (acsapp l. Nano mate, 2020,3,10454-10461), constructs active sites with rich surface defects (environ. Sci. Technology, 2023,57,5831-5840), even prepares single atom/sub-nano-scale catalysts (j. Mate. Chem. A,2021,9,3492), and improves the electrocatalytic performance and stability of the material (patent CN 110975877B). Compared with other nano preparation technologies, the quenching process has the advantages of simple flow, short time consumption, low cost and the like, and has potential of industrial production. However, the conventional quenching equipment has the key defects that 1) oxidation pollution is caused in the conventional quenching process, samples are heated and transferred at high temperature in air, so that oxidation reaction is easily carried out on the surfaces of the materials with the air, the purity and activity of the materials are reduced, and 2) the sensitive material treatment limit is that the existing open quenching equipment cannot avoid chemical denaturation of the materials in the transfer stage for the active materials which are easy to react with oxygen/moisture. Aiming at the problems, the Chinese patent with the patent number CN103673611B proposes a rapid quenching tube type heating furnace with protective atmosphere, which heats and rapidly immerses a sample in a quenching tank through an inert gas environment, thereby reducing the oxidation risk in a high-temperature stage to a certain extent. However, the device has obvious limitations that 1) a sample is transferred from a heating area to a quenching tank through an open transition area, so that materials are still exposed to the air environment in the transfer process, and cannot meet the preparation requirements of high-activity nano materials (such as lithium ion battery anode materials and metal organic framework compounds), 2) the sample and a porcelain boat are pushed into the quenching tank together, the porcelain boat possibly reacts with a quenching medium to introduce impurities, 3) the quenching medium is placed in an open way, and the direct contact with the air can lead to oxidation and pollution of the medium, so that if an organic quenching medium is used, the explosion safety hazard exists. Disclosure of utility model The utility model aims to provide an in-situ atmosphere quenching tube furnace which is mainly used for heating and quenching nano materials with extremely sensitive air. The in-situ atmosphere quenching tube furnace designed by the utility model comprises a sample tank capable of being turned over movably in a closed environment and a quenching tank capable of containing quenching medium detachably, so that heating, quenching and separation of the quenching medium from the sample tank during quenching are realized in the in-situ atmosphere protection, the purity and performance of the nano material extremely sensitive to air are maintained, and meanwhile, the high efficiency and economy of the quenching process are maintained. The implementation process of the utility model is as follows: The utility model provides an in-situ atmosphere quenching tube furnace, includes the high temperature furnace body, run through in the high temperature furnace body and have the boiler tube that length is greater than the furnace body, the front end of boiler tube is connected with T type tee bend, be provided with the sample groove of taking the long handle in the T type tee bend horizontal direction, T type tee bend vertical direction is the inlet end, the rear portion of boiler tube is provided with the quenching bath interface perpendicularly, quenching bath interface below is connected with the quenching bath, the rear end of boiler tube is the end of giving vent to anger, the end of giving vent to anger is connected with the hose that is used for connecting the vacuum pump or deriving gas. Furthermore, the air inlet end is provided with a high-precision barometer and an air inlet valve in sequence from bottom to top, and the air outlet end is provided with an air outlet valve. Furthermore, th