Water-cooling lining high-temperature heating furnace capable of isolating protective gas from reaction gas

Abstract

The utility model relates to the technical field of high-temperature heating furnaces, in particular to a water-cooling lining high-temperature heating furnace capable of isolating shielding gas from reaction gas, which comprises a furnace body upper joint, a furnace body upper interface flange, a furnace body lower joint, a furnace body lower interface flange, an airtight isolation sleeve and a heating body, the furnace body lower connector flange is installed at the upper end of the furnace body lower connector, a sample reaction gas outlet penetrating through the furnace body upper connector is formed in the middle of the furnace body upper connector, a sample reaction gas inlet penetrating through the furnace body lower connector is formed in the middle of the furnace body lower connector, and the upper end of the airtight isolation sleeve penetrates through the furnace body upper connector flange and then is connected with the sample reaction gas outlet. The lower end of the airtight isolation sleeve penetrates through the furnace body lower connector flange and then is connected with a sample reaction gas inlet, the heating body is wound on the airtight isolation sleeve, and the two ends of the heating body extend out of the furnace body upper connector.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature heating furnaces, in particular to a water-cooled sleeve high-temperature heating furnace capable of isolating protective gas and reaction gas. Background Art

[0002] The current high-temperature experimental heating furnace has a simple structure, with only an alumina sleeve to physically separate the sample chamber and the heating body; the heating body has no independent isolation chamber, and different gases cannot be introduced into the sample reaction chamber and the heating chamber at the same time when working at high temperature. The heating chamber cannot be filled with inert protective gas, which leads to accelerated oxidation and shortens the service life of the heating body;

[0003] Secondly, the use of fan local cooling cannot achieve high-precision program temperature control, the cooling effect is slow, and there are great limitations on the safety protection of operators and fire safety hazards; the operating temperature conditions are limited, the service life is short, and it is difficult to replace accessories.

[0004] Therefore, in order to solve the technical problems described above, there is an urgent need for a water-cooled high-temperature heating furnace that can isolate the protective gas and the reaction gas. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the defects of the above-mentioned technology and provide a water-cooled liner high-temperature heating furnace capable of isolating protective gas and reaction gas.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is a water-cooled liner high-temperature heating furnace capable of isolating protective gas and reaction gas, comprising:

[0007] A furnace body upper joint, a furnace body upper interface flange, a furnace body lower joint, a furnace body lower interface flange, an airtight isolation sleeve and a heating body, wherein the furnace body upper interface flange is installed at the lower end of the furnace body upper joint, and the furnace body lower interface flange is installed at the upper end of the furnace body lower joint, a sample reaction gas outlet penetrating the furnace body upper joint is provided in the middle of the furnace body upper joint, and a sample reaction gas inlet penetrating the furnace body lower joint is provided in the middle of the furnace body lower joint, the upper end of the airtight isolation sleeve passes through the furnace body upper interface flange and is connected to the sample reaction gas outlet, the lower end of the airtight isolation sleeve passes through the furnace body lower interface flange and is connected to the sample reaction gas inlet, the heating body is wrapped around the airtight isolation sleeve, and both ends of the heating body extend from the furnace body upper joint;

[0008] The outside of the airtight isolation sleeve is provided with a water-cooled inner sleeve and a water-cooled outer sleeve in sequence, the upper ends of the water-cooled inner sleeve and the water-cooled outer sleeve are connected to the lower end of the upper interface flange of the furnace body, and the lower ends of the water-cooled inner sleeve and the water-cooled outer sleeve are connected to the upper end of the lower interface flange of the furnace body;

[0009] A heating body protection cavity is formed between the water-cooled inner liner, the airtight isolation sleeve, the furnace body upper interface flange, and the furnace body lower interface flange;

[0010] A heating body protection gas inlet is provided on the upper joint of the furnace body, and the other end of the heating body protection gas inlet is connected to the heating body protection cavity. A heating body protection gas outlet is provided on the upper joint of the furnace body, and the other end of the heating body protection gas outlet is connected to the heating body protection cavity.

[0011] The furnace body lower joint is provided with a water inlet, the other end of which is connected to the inside of the water-cooled outer bushing; the furnace body upper joint is provided with a water outlet, the other end of which is connected to the inside of the water-cooled outer bushing.

[0012] As an improvement, a heating body lining is provided on the outer wall of the middle part of the airtight isolation sleeve, and a threaded groove is provided on the heating body lining. The heating body is wound in the threaded groove, and an outer sleeve is provided outside the heating body lining. The outer sleeve is sleeved on the heating body lining to form a seal for the threaded groove.

[0013] As an improvement, the lower end of the furnace body upper interface flange and the upper end of the furnace body lower interface flange are both provided with an outer ring groove, and the upper and lower ends of the water-cooled outer bushing are respectively connected to the outer ring grooves on the furnace body upper interface flange and the furnace body lower interface flange;

[0014] A water-cooled bushing circulation cavity is formed between the water-cooled outer bushing, the water-cooled inner bushing, the furnace body upper interface flange, and the furnace body lower interface flange, and the water inlet and the water outlet are both connected to the water-cooled bushing circulation cavity.

[0015] The advantages of the utility model compared with the prior art are:

[0016] 1. In this product, the airtight isolation sleeve wrapped around the heater on the outside is installed on the upper joint and the lower joint of the furnace body, and an independent sample chamber reaction gas cavity is formed inside the airtight isolation sleeve; an independent heater protection cavity is formed between the water-cooled inner sleeve, the airtight isolation sleeve, the upper interface flange of the furnace body, and the lower interface flange of the furnace body; the heater protection cavity is connected to the external inert protective gas tank through the heater protection gas inlet and outlet, so that the heater is placed in the heater protection cavity to form an independent cavity. When working at high temperature, different gases can be introduced into the sample chamber reaction gas cavity and the heating cavity respectively. Since the heater protection cavity is filled with inert protective gas, the heater can be protected to prevent oxidation and increase the service life of the heater;

[0017] 2. A water-cooled bushing circulation cavity is formed between the water-cooled outer bushing, the water-cooled inner bushing, the upper interface flange of the furnace body, and the lower interface flange of the furnace body. The water inlet and outlet are connected to an external water source, so that cold water circulates inside the water-cooled bushing circulation cavity, achieving the function of a safety protection layer for the outer layer of the entire heating furnace, allowing the furnace body to be operated by external hand touch when working at high temperature, with good cooling effect, small temperature rise and fall control error, relatively safe, wide application range, long service life, and simple replacement of accessories;

[0018] 3. This furnace body adopts an independent multi-cavity isolation design with reasonable structure and simple operation. It can solve the current purpose of multiple gas experiments under high temperature conditions and effectively improve operational safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a front view of a water-cooled liner high-temperature heating furnace capable of isolating protective gas and reaction gas.

[0020] Figure 2 The utility model is a three-dimensional structural schematic diagram of a water-cooled sleeve high-temperature heating furnace capable of isolating protective gas and reaction gas.

[0021] Figure 3 The utility model is a top view of a water-cooled sleeve high-temperature heating furnace capable of isolating protective gas and reaction gas.

[0022] Figure 4 The utility model discloses a three-dimensional disassembled state diagram of a water-cooled sleeve high-temperature heating furnace capable of isolating a protective gas and a reaction gas, viewed from above.

[0023] Figure 5 The utility model discloses a top-view three-dimensional disassembled state diagram of a water-cooled sleeve high-temperature heating furnace capable of isolating a protective gas and a reaction gas.

[0024] Figure 6 The utility model is a structural schematic diagram of a water-cooled bushing high-temperature heating furnace heating body capable of isolating protective gas and reaction gas.

[0025] Figure 7 The utility model discloses a structural schematic diagram of a furnace body lower joint and a furnace body lower interface flange of a water-cooled bushing high-temperature heating furnace capable of isolating protective gas and reaction gas.

[0026] Figure 8 yes Figure 1 Cross-sectional view at AA in the middle.

[0027] Fig. 9 yes Figure 1 Cross-sectional view at the middle BB.

[0028] Fig.10 yes Figure 3 Cross-sectional view at CC.

[0029] Fig.11 yes Figure 3 Cross-sectional view at DD in the middle.

[0030] Fig.12 yes Figure 8 A partial enlarged view of point E in the middle.

[0031] As shown in the figure:

[0032] 100. Furnace upper joint, 101. Sample reaction gas outlet, 102. Heating body protection gas inlet, 103. Heating body protection gas outlet, 104. Water outlet, 105. Inner ring groove, 106. Outer ring groove, 107. Quick connector, 108. Jack, 109. Embedded sealing ring groove, 200. Furnace upper interface flange, 300. Furnace lower joint, 301. Water injection port, 302. Pipe joint, 400. Furnace lower interface flange, 500. Airtight isolation sleeve, 501. Sample reaction gas inlet, 502. Heating body lining, 503. Threaded groove, 504. Outer sleeve, 505. Sample reaction gas cavity, 600. Heating body, 700. Water-cooled inner sleeve, 701. Heating body protection cavity, 800. Water-cooled outer sleeve, 801. Water-cooled sleeve circulation cavity. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Combined with Figure 1-12 , a water-cooled sleeve high-temperature heating furnace capable of isolating a protective gas and a reactive gas, comprising:

[0035] The furnace body upper joint 100, the furnace body upper interface flange 200, the furnace body lower joint 300, the furnace body lower interface flange 400, the airtight isolation sleeve 500 and the heating body 600, the furnace body upper interface flange 200 is installed at the lower end of the furnace body upper joint 100, the furnace body lower interface flange 400 is installed at the upper end of the furnace body lower joint 300, the furnace body upper joint 100 is provided with a sample reaction gas outlet 101 penetrating the furnace body upper joint 100 in the middle, the furnace body lower joint 30 0 is provided in the middle of the furnace body with a sample reaction gas inlet 501 penetrating through the furnace body lower joint 300, the upper end of the airtight isolation sleeve 500 passes through the furnace body upper interface flange 200 and is connected to the sample reaction gas outlet 101, the lower end of the airtight isolation sleeve 500 passes through the furnace body lower interface flange 400 and is connected to the sample reaction gas inlet 501, the heating body 600 is wound around the airtight isolation sleeve 500, and both ends of the heating body 600 extend from the furnace body upper joint 100;

[0036] The airtight isolation sleeve 500 is provided with a water-cooled inner sleeve 700 and a water-cooled outer sleeve 800 in sequence on the outside. The upper ends of the water-cooled inner sleeve 700 and the water-cooled outer sleeve 800 are connected to the lower end of the furnace body upper interface flange 200, and the lower ends of the water-cooled inner sleeve 700 and the water-cooled outer sleeve 800 are connected to the upper end of the furnace body lower interface flange 400;

[0037] A heating body protection cavity 701 is formed between the water-cooled inner liner 700, the airtight isolation sleeve 500, the furnace body upper interface flange 200, and the furnace body lower interface flange 400;

[0038] A heater protection gas inlet 102 is provided on the upper joint 100 of the furnace body, and the other end of the heater protection gas inlet 102 is communicated with the heater protection cavity 701. A heater protection gas outlet 103 is provided on the upper joint 100 of the furnace body, and the other end of the heater protection gas outlet 103 is communicated with the heater protection cavity 701; the heater protection gas inlet 102 of the heater protection cavity 701 is connected to an external inert gas source and an air pressure flowmeter, and the heater protection gas outlet 103 is connected to an external one-way valve, so as to achieve one-way injection of the inert protection gas and prevent reverse backflow isolation effect;

[0039] The furnace body lower joint 300 is provided with a water inlet 301, and the other end of the water inlet 301 is connected to the inside of the water-cooled outer bushing 800. The furnace body upper joint 100 is provided with a water outlet 104, and the other end of the water outlet 104 is connected to the inside of the water-cooled outer bushing 800.

[0040] A heating body lining 502 is provided on the outer wall of the middle part of the airtight isolation sleeve 500, and a thread groove 503 is provided on the heating body lining 502. The heating body 600 is wound in the thread groove 503. The heating body 600 is usually a resistance wire or an electric heating belt, etc., and the length needs to be determined according to the length of the airtight isolation sleeve 500 and the heating requirement. An outer sleeve 504 is provided outside the heating body lining 502, and the outer sleeve 504 is sleeved on the heating body lining 502 to form a seal on the thread groove 503;

[0041] A sample reaction gas cavity 505 is formed inside the airtight isolation sleeve 500; matching gas adapters are installed on the sample reaction gas outlet 101 and the sample reaction gas inlet 501, and the sample reaction gas cavity 505 is injected / exhausted with the reaction gas required by the experimental design through the matching gas adapter.

[0042] The lower end of the furnace body upper joint 100 and the upper end of the furnace body lower joint 300 are both provided with an embedded sealing ring groove 109, and the upper and lower ends of the airtight isolation sleeve 500 are respectively inserted into and passed through the embedded sealing ring grooves 109 on the furnace body upper joint 100 and the furnace body lower joint 300, and a sealing ring can be installed in the embedded sealing ring groove 109 for sealing.

[0043] The lower end of the furnace body upper interface flange 200 and the upper end of the furnace body lower interface flange 400 are both provided with an inner ring groove 105, and the upper and lower ends of the water-cooled inner sleeve 700 are respectively connected to the inner ring groove 105 on the furnace body upper interface flange 200 and the furnace body lower interface flange 400; the water-cooled inner sleeve 700 is welded to the inner ring groove 105 of the furnace body upper interface flange 200 and the furnace body lower interface flange 400 by argon arc welding;

[0044] The lower end of the furnace body upper interface flange 200 and the upper end of the furnace body lower interface flange 400 are both provided with an outer ring groove 106, and the upper and lower ends of the water-cooled outer bushing 800 are respectively connected to the outer ring grooves 106 on the furnace body upper interface flange 200 and the furnace body lower interface flange 400;

[0045] The water-cooled outer bushing 800 is welded to the outer ring groove 106 of the furnace body upper interface flange 200 and the furnace body lower interface flange 400 by argon arc welding;

[0046] A water-cooled bushing circulation cavity 801 is formed between the water-cooled outer bushing 800, the water-cooled inner bushing 700, the furnace body upper interface flange 200, and the furnace body lower interface flange 400. The water-cooled bushing circulation cavity 801 is a 5 mm sealed interlayer between the water-cooled outer bushing 800 and the water-cooled inner bushing 700. The water injection port 301 and the water outlet 104 are both connected to the water-cooled bushing circulation cavity 801. The external water source is connected through the water injection port 301 and the water outlet 104 to reach the outer safety protection layer of the entire heating furnace, forming a water cooling cycle.

[0047] The water inlet 301 and the water outlet 104 are both provided with pipe joints 302 .

[0048] The heater protection gas inlet 102 and the heater protection gas outlet 103 are both provided with quick-connect connectors 107 .

[0049] The furnace body upper joint 100 is symmetrically provided with a plug hole 108 penetrating into the heating body protection cavity 701 . Both ends of the heating body 600 are located in the plug hole 108 and extend out from the plug hole 108 so as to be connected to an external power source.

[0050] The water-cooled sleeve high-temperature heating furnace that can isolate the protective gas and the reaction gas can achieve water cooling in the entire temperature range by injecting cooling water into the closed water-cooled sleeve circulation cavity 801 between the heating body protection cavity 701 and the furnace body water-cooled outer sleeve 800 and the water-cooled inner sleeve 700. In order to facilitate the use with other equipment, the upper and lower end surfaces of the heating furnace can be expanded to design support connection plates and tenons, which can be quickly used without disassembling any parts of the heating furnace, and the positioning and resetting accuracy are excellent.

[0051] When the utility model is implemented and used,

[0052] Turn on the power of the heating body 600, and heat the heating furnace through the heating body 600. When the heating body 600 starts to heat up from room temperature, inert gas can be introduced from the heating body protection gas inlet 102 in real time to protect the heating body 600 from working at high temperature in a non-oxidizing environment, and the protection gas is discharged from the heating body protection gas outlet 103 of the heating body protection cavity 701;

[0053] When the furnace is operated at a high temperature or even an ultra-high temperature, usually reaching or exceeding 1100°C, the reaction gas required for the experiment is independently charged from the sample reaction gas inlet 501, and can undergo oxidation and reduction reactions with the sample to be tested separately and be discharged from the sample reaction gas outlet 101;

[0054] When cooling or temperature reduction is required, water is injected into the water-cooled bushing circulation chamber 801 through the water injection port 301. When the water in the water-cooled bushing circulation chamber 801 is full of water, it will flow out from the water outlet 104. Cold water is injected through the water injection port 301, and hot water is discharged through the water outlet 104. A water-cooled cycle will be formed in the water-cooled bushing circulation chamber 801, forming a high-temperature heat conduction evacuation layer, thus achieving water cooling in the entire temperature range; external hand touch operation is allowed when the furnace body is working at high temperature, and the cooling effect and temperature rise and fall control error are small.

[0055] Routine test of high temperature heating furnace:

[0056] Sealing test: by filling the sample reaction gas chamber 505 with gas of a certain pressure, check whether there is leakage at each connection to ensure the airtightness of the entire system.

[0057] Heating performance test: Turn on the power, start the heating body 600, and use the temperature sensor to monitor the temperature changes in the airtight isolation sleeve 500 and the sample reaction gas cavity 505 to ensure that the heating effect meets the design requirements.

[0058] Cooling effect test: Inject cooling water into the water-cooled bushing circulation cavity 801 through the water injection port 301, start the cooling water circulation system, observe the change of water temperature at the water outlet 104, and evaluate the cooling effect.

[0059] Shielding gas circulation test: The shielding gas is introduced through the heater shielding gas inlet 102 to observe whether the shielding gas can circulate smoothly in the heater protection cavity 701 and be discharged through the heater shielding gas outlet 103 to ensure that the shielding gas system works normally.

[0060] Operation and maintenance

[0061] During normal use, the sealing of each connection needs to be checked regularly to ensure there is no leakage.

[0062] Check the working status of the heating body 600 regularly and replace the aged or damaged heating elements in time.

[0063] Regularly clean the scale and impurities in the water-cooling bushing to maintain the cooling effect.

[0064] Pay attention to the flow and pressure of the shielding gas to ensure stable operation of the shielding gas system.

[0065] In the description of the embodiments of the present utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0066] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0067] In the description of the embodiments of the present invention, "multiple" means at least 2.

[0068] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0069] The above describes the utility model and its implementation methods, which are not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A water-cooled high-temperature heating furnace capable of isolating protective gas and reaction gas, characterized in that: include: A furnace body upper joint (100), a furnace body upper interface flange (200), a furnace body lower joint (300), a furnace body lower interface flange (400), an airtight isolation sleeve (500) and a heating body (600), wherein the furnace body upper interface flange (200) is installed at the lower end of the furnace body upper joint (100), the furnace body lower interface flange (400) is installed at the upper end of the furnace body lower joint (300), a sample reaction gas outlet (101) penetrating the furnace body upper joint (100) is provided in the middle of the furnace body upper joint (100), and the furnace body lower joint (300) is provided with a gas outlet (101) for sample reaction gas. 00) is provided in the middle of the furnace body with a sample reaction gas inlet (501) penetrating the furnace body lower joint (300); the upper end of the airtight isolation sleeve (500) passes through the furnace body upper interface flange (200) and is connected to the sample reaction gas outlet (101); the lower end of the airtight isolation sleeve (500) passes through the furnace body lower interface flange (400) and is connected to the sample reaction gas inlet (501); the heating body (600) is wrapped around the airtight isolation sleeve (500), and both ends of the heating body (600) extend from the furnace body upper joint (100); The airtight isolation sleeve (500) is provided with a water-cooled inner sleeve (700) and a water-cooled outer sleeve (800) in sequence on the outside, the upper ends of the water-cooled inner sleeve (700) and the water-cooled outer sleeve (800) are connected to the lower end of the furnace body upper interface flange (200), and the lower ends of the water-cooled inner sleeve (700) and the water-cooled outer sleeve (800) are connected to the upper end of the furnace body lower interface flange (400); A heating body protection cavity (701) is formed between the water-cooled inner liner (700), the airtight isolation sleeve (500), the furnace body upper interface flange (200), and the furnace body lower interface flange (400); The furnace body upper joint (100) is provided with a heater protection gas inlet (102), the other end of the heater protection gas inlet (102) is communicated with the heater protection cavity (701), and the furnace body upper joint (100) is provided with a heater protection gas outlet (103), the other end of the heater protection gas outlet (103) is communicated with the heater protection cavity (701); The furnace body lower joint (300) is provided with a water injection port (301), the other end of which is in communication with the interior of a water-cooled outer bushing (800); the furnace body upper joint (100) is provided with a water outlet (104), the other end of which is in communication with the interior of a water-cooled outer bushing (800).

2. A water-cooled liner high-temperature heating furnace capable of isolating protective gas and reaction gas according to claim 1, characterized in that: A heating body lining (502) is provided on the outer wall of the middle part of the airtight isolation sleeve (500), a thread groove (503) is provided on the heating body lining (502), the heating body (600) is wound in the thread groove (503), an outer sleeve (504) is provided outside the heating body lining (502), and the outer sleeve (504) is sleeved on the heating body lining (502) to form a seal on the thread groove (503).

3. A water-cooled liner high-temperature heating furnace capable of isolating protective gas and reaction gas according to claim 1, characterized in that: The lower end of the furnace body upper joint (100) and the upper end of the furnace body lower joint (300) are both provided with an embedded sealing ring groove (109), and the upper and lower ends of the airtight isolation sleeve (500) are respectively inserted into and passed through the embedded sealing ring grooves (109) on the furnace body upper joint (100) and the furnace body lower joint (300).

4. The water-cooled liner high-temperature heating furnace capable of isolating protective gas and reaction gas according to claim 1, characterized in that: The lower end of the furnace body upper interface flange (200) and the upper end of the furnace body lower interface flange (400) are both provided with an inner ring groove (105), and the upper and lower ends of the water-cooled inner sleeve (700) are respectively connected to the inner ring grooves (105) on the furnace body upper interface flange (200) and the furnace body lower interface flange (400).

5. The water-cooled sleeve high-temperature heating furnace capable of isolating protective gas and reaction gas according to claim 1, characterized in that: The lower end of the furnace body upper interface flange (200) and the upper end of the furnace body lower interface flange (400) are both provided with an outer ring groove (106), and the upper and lower ends of the water-cooled outer bushing (800) are respectively connected to the outer ring grooves (106) on the furnace body upper interface flange (200) and the furnace body lower interface flange (400); A water-cooled bushing circulation chamber (801) is formed between the water-cooled outer bushing (800), the water-cooled inner bushing (700), the furnace body upper interface flange (200), and the furnace body lower interface flange (400), and the water injection port (301) and the water outlet (104) are both connected to the water-cooled bushing circulation chamber (801).

6. A water-cooled liner high-temperature heating furnace capable of isolating protective gas and reaction gas according to claim 4, characterized in that: The water inlet (301) and the water outlet (104) are both provided with pipe joints (302).

7. The water-cooled liner high-temperature heating furnace capable of isolating protective gas and reaction gas according to claim 1, characterized in that: The heater protection gas inlet (102) and the heater protection gas outlet (103) are both provided with quick-connect joints (107).

8. The water-cooled liner high-temperature heating furnace capable of isolating protective gas and reaction gas according to claim 1, characterized in that: The furnace body upper joint (100) is symmetrically provided with a plug hole (108) penetrating into the heating body protection cavity (701); the two ends of the heating body (600) are located in the plug hole (108) and extend out from the plug hole (108).

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