A high-vanadium high-niobium alloy composite roller and a heat treatment equipment and process thereof

Abstract

The application relates to the field of rolls, and particularly discloses a high-vanadium high-niobium alloy composite roll and a heat treatment equipment and heat treatment process thereof. The composite roll comprises a roll body and a roll core; an inner groove is formed in the middle of the roll body, and the roll core is located in the inner groove, so that the roll body completely wraps the roll core; the roll body is composed of the following materials: carbon 1.0%-1.5%; silicon 0.8%-1.2%; manganese 0.3%-1.0%; chromium 7.5%-10.0%; molybdenum 1.0%-2.0%; vanadium 2.5%-5.0%; niobium 0.8%-2.0%; and the rest is iron; and the roll core is a high-toughness cast steel material. The application has the effect that the roll body completely wraps the roll core, so that the roll of the application only needs to heat the outer wall surface of the roll body to improve the hardness of the roll body during heat treatment, thereby being easier to heat treat and being more conducive to improving the quality of the application.

Description

Technical Field

[0001] This application relates to the field of rolling mill rolls, and in particular to a high-vanadium, high-niobium alloy composite rolling mill roll and its heat treatment equipment and heat treatment process. Background Technology

[0002] Carbide rolls, due to their excellent wear resistance, high-temperature red hardness, thermal fatigue resistance, and high strength, have been widely used in the production of bars, wire rods, rebars, and seamless steel pipes, greatly improving the effective operating rate of rolling mills.

[0003] In actual production, the friction and impact between the rolls and the steel billet cause wear and deformation on the roll surface, resulting in high roll hardness. A common solution is to add high-chromium cast iron or tungsten steel to the rolls to increase their hardness. However, this method only increases hardness. As is well known, ideal cast steel materials have high internal toughness and high external hardness to ensure better performance.

[0004] The patent document with patent number CN202011372118.9 proposes a combined roll consisting of a high-toughness transition layer and a high-hardness working layer. However, the working layer is embedded in part of the transition layer, which causes both the transition layer and the working layer to be exposed at the same time. As a result, during the heat treatment of the roll, due to the inconsistency between the inner and outer layer materials, it is impossible to simultaneously meet the heat treatment temperatures of the inner and outer layers, leading to production difficulties and poor quality. Summary of the Invention

[0005] To address the problem of insufficient heat treatment temperatures for both the inner and outer layers of rolls during heat treatment, which leads to production difficulties and poor quality, this application provides a high-vanadium, high-niobium alloy composite roll, its heat treatment equipment, and heat treatment process.

[0006] The technical solution provided in this application for a high-vanadium, high-niobium alloy composite roll, its heat treatment equipment, and heat treatment process is as follows:

[0007] The first objective of this application is to provide a high-vanadium, high-niobium alloy composite roll, the composite roll comprising a roll body and a roll core; an inner groove is formed in the middle of the roll body, and the roll core is located in the inner groove so that the roll body completely encloses the roll core; the roll body is composed of the following materials: carbon 1.0%-1.5%; silicon 0.8%-1.2%; manganese 0.3%-1.0%; chromium 7.5%-10.0%; molybdenum 1.0%-2.0%; vanadium 2.5%-5.0%; niobium 0.8%-2.0%; the remainder being iron; the roll core is a high-toughness cast steel material.

[0008] By adopting the above technical solution, the roller body completely encloses the roller core, which is made of a highly tough material. The addition of materials such as chromium, vanadium, and niobium to the roller body increases its hardness. Therefore, this application primarily involves a high-hardness outer layer completely enclosing a high-toughness inner layer. This means that during heat treatment, only the roller body is exposed, allowing for precise selection of the heat treatment temperature, resulting in better heat treatment effects and higher product quality.

[0009] The second objective of this application is to provide a heat treatment apparatus for the aforementioned high-vanadium, high-niobium alloy composite rolls; the heat treatment apparatus includes: a heat treatment furnace for forming a heat treatment chamber for heating the composite rolls, a control door for controlling the opening and closing of the heat treatment chamber, and a support structure for supporting a support frame; the support structure is disposed in the heat treatment chamber, and the support frame is used to place the composite rolls to be heat treated; a flexible expansion member connected to the heat treatment furnace, and the flexible expansion member is used to form an expansion control chamber; a driving member for injecting a fluid medium into the expansion control chamber to cause the flexible expansion member to expand to partially or completely enclose the support frame, so that the flexible expansion member and the heat treatment chamber form a ventilation chamber that at least partially encloses the support frame; and an atmosphere control member for injecting argon gas into the ventilation chamber and discharging other gases from the ventilation chamber; wherein, after the flexible expansion member expands, the volume of the flexible expansion member in the heat treatment chamber increases, so that the volume of the ventilation chamber is smaller than the volume of the heat treatment chamber.

[0010] By adopting the above technical solution, the composite roll to be heat-treated is subjected to heat treatment in an argon atmosphere. Argon gas can be used to protect the composite roll, thus providing better protection. Furthermore, by utilizing the expansion of a flexible expansion member within the heat treatment chamber, the volume of the heat treatment chamber can be reduced, thereby reducing the volume of air in contact with the composite roll placed on the support frame. This allows for the subsequent replacement of the air in the heat treatment chamber with argon gas in a smaller ventilation chamber, significantly shortening the time required for argon gas replacement and saving on argon gas consumption, as well as reducing the amount of argon gas emitted into the air. After the ventilation chamber has been ventilated, the flexible expansion member contracts, and argon gas is slowly introduced into the heat treatment chamber. This achieves the initial filling of a very small ventilation chamber with argon gas to accelerate the ventilation process, followed by a gradual expansion of the ventilation chamber until it reaches the size of the heat treatment chamber. At this point, the introduced argon gas does not require further ventilation. This not only speeds up the filling of argon into the heat treatment chamber, but also greatly improves the purity of argon in the heat treatment chamber, better protecting the heat-treated composite rolls and improving product quality.

[0011] Optionally, the support frame has multiple accommodating spaces; each accommodating space forms a placement area for placing the composite roll to be heat-treated and an air area where no composite roll to be heat-treated is placed; the flexible expansion member is used to form a seal with a variable shape; after the flexible expansion member expands, the seal forms an abutment surface that contacts the support frame, and an air area protrusion that is partially or completely embedded in the accommodating space is formed on the abutment surface.

[0012] By adopting the above technical solution, the support frame has multiple layers of accommodating space to accommodate more composite rolls to be heat-treated. Since the composite rolls are bar stock, gaps will exist after stacking, preventing complete filling of the accommodating space and thus creating storage areas and air areas. The abutting surface formed by the expanded flexible expansion component contacts the support frame, thereby wrapping around the support frame. This makes the ventilation chamber essentially multiple accommodating spaces within the support frame, further reducing the volume of the ventilation chamber. Additionally, the protrusions formed by the expanded flexible expansion component also embed into the air areas of the accommodating space, making the ventilation chamber merely a storage area or a storage area combined with some air areas. This allows the ventilation chamber to provide a near-vacuum environment for the heat-treatment chamber. Besides the composite rolls to be heat-treated, the ventilation chamber contains almost no other gas. When argon is injected, it can better replace other gases in the ventilation chamber, ensuring a faster filling speed of the heat-treatment chamber and improving the purity of the argon within it.

[0013] Optionally, the heat treatment furnace further includes an installation chamber; the installation chamber communicates with the heat treatment chamber via a connection port; a stop is provided at the connection port; the driving member is further configured to move the stop to a first position opening the connection port and a second position closing the connection port; the driving member is further configured to cause the flexible expansion member to have an expanded state and a contracted state; when the stop is moved to the first position, the flexible expansion member is in the expanded state; when the stop is moved to the second position, the flexible expansion member is in the contracted state; when the flexible expansion member is in the expanded state, the volume of the flexible expansion member in the heat treatment chamber increases; when the flexible expansion member is in the contracted state, the flexible expansion member is completely contracted into the installation chamber.

[0014] By adopting the above technical solution, the installation chamber accommodates the flexible expansion component. When heat treatment is required, the heat treatment chamber heats up, at which point the flexible expansion component completely retracts into the installation chamber. Then, a baffle separates the installation chamber from the heat treatment chamber, insulating the heat treatment chamber and keeping the flexible expansion component away from the high-temperature environment, thus protecting the flexible expansion component. Simultaneously, retracting the flexible expansion component to a position away from the heat treatment chamber, and using the baffle to seal the heat treatment chamber, better ensures the airtightness of the heat treatment chamber.

[0015] Optionally, when the stop is in the first position, the stop is used to form a first annular opening and a second annular opening in the connection port; the outer ring of the first annular opening is located inside the inner ring of the second annular opening; the first annular opening is used to allow the flexible expansion member to expand outward, so that the flexible expansion member expands to form the abutment surface and the protrusion; the second annular opening is used to allow the flexible expansion member to expand outward, so that the flexible expansion member expands to the area between the support frame and the heat treatment chamber; when the stop is in the second position, the first annular opening and the second annular opening are closed.

[0016] By adopting the above technical solution, one part of the flexible expansion component will expand outward from the first annular opening, and another part of the flexible expansion component will expand outward from the second annular opening. This avoids the flexible expansion component needing to expand to an excessively long length at one position, thus preventing the flexible expansion component from being easily damaged due to excessive expansion length. It also avoids the situation where the flexible expansion component is difficult to expand to form a contact surface and protrusion, thus better ensuring the stability of the flexible expansion component during use.

[0017] Optionally, when the driving member moves the stop member from the second position to the first position, the driving member also causes the flexible expansion member to expand until it abuts against the side of the stop member away from the heat treatment chamber.

[0018] By adopting the above technical solution, when the driving component is about to move the stop and open the connection port, the flexible expansion component abuts against the side of the stop that is away from the heat treatment chamber. Then, when the stop opens, the flexible expansion component seals the connection port, preventing air from the heat treatment chamber from entering the installation chamber and vice versa. This better ensures that the heat treatment chamber remains sealed, thus allowing for better replacement of the air in the heat treatment chamber with argon gas.

[0019] Optionally, the flexible expansion member includes at least a highly elastic rubber membrane capable of forming the expansion control chamber; when the stop is in the second position, the drive member draws the fluid medium away from the expansion control chamber to make the flexible expansion member in a contracted state; when the flexible expansion member is in the contracted state, a vacuum insulation chamber is formed between the highly elastic rubber membrane and the stop.

[0020] By adopting the above technical solution, when the high-elasticity rubber membrane shrinks, it will be located in the installation chamber, and the baffle will seal the connection, thus providing heat insulation for the high-elasticity rubber membrane and preventing it from being affected by high-temperature environments, which could lead to a decrease in elasticity. Furthermore, a vacuum insulation chamber is formed between the baffle and the high-elasticity rubber membrane. Utilizing this vacuum chamber for heat insulation can better block heat transfer, preventing the high-elasticity rubber membrane from contacting the baffle. The vacuum between them further prevents the high-elasticity rubber membrane from being stored at high temperatures, thus better protecting it.

[0021] Optionally, two sets of the flexible expansion member and the driving member are provided; the control door is provided with a door inner cavity, one set of the flexible expansion member is provided in the door inner cavity, and the other set of the flexible expansion member is provided in the mounting chamber; two stops are provided, one stop is located between the door inner cavity and the heat treatment chamber, and the other stop is located between the mounting chamber and the heat treatment chamber; when the stop is in the first position, the two sets of flexible expansion members are joined to form the ventilation chamber that can fully enclose the support frame.

[0022] By adopting the above technical solution, and by setting up two sets of flexible expansion components and two sets of driving components, the flexible expansion components can expand simultaneously in two directions towards the support frame when they expand. Therefore, the expansion degree required by the two flexible expansion components is less than that required by one flexible expansion component. This makes it easier to form a ventilation chamber that wraps around the support frame with the flexible expansion components, and also better ensures the sealing of the ventilation chamber. As a result, when filling with argon gas later, the injection of argon gas can be completed more quickly and the purity of argon gas can be guaranteed.

[0023] Optionally, an auxiliary expander is formed on the flexible expander; the auxiliary expander forms an auxiliary chamber capable of expanding and contracting; the flexible expander and the auxiliary expander are connected by an elastic clamping structure; the elastic clamping structure is used to form a connecting chamber; the clamping structure is used to configure the connecting chamber such that when the pressure in the expansion control chamber is greater than a preset pressure, the auxiliary chamber is connected to the expansion control chamber.

[0024] Because the expansion degree of the flexible expander is limited, when the flexible expander forms a protrusion, the protrusion can only be partially embedded in the air area. After the flexible expander is partially embedded in the air area, the expansion degree of the flexible expander reaches its limit, so it is difficult to make the flexible expander completely fill the air area.

[0025] By adopting the above technical solution, when the flexible expander cannot expand and the pressure in the flexible expander has reached the preset pressure, the auxiliary expander can expand. The auxiliary expander can continue to expand and reach a position that the flexible expander cannot reach, so that the air chamber can be filled more by the flexible expander or the auxiliary expander. This better ensures that the ventilation chamber contains only the storage area and a very small air area, thus accelerating the conversion of air into argon. In some cases, it can also ensure that the ventilation chamber is in a vacuum state, containing only the support frame and the composite roll to be heat-treated. This is more conducive to increasing the argon injection speed and the purity of argon in the heat treatment chamber.

[0026] The second objective of this application is to provide a heat treatment process for the aforementioned high-vanadium, high-niobium alloy composite rolls; the heat treatment process includes: placing a support frame for holding the composite rolls to be heat-treated into a heat treatment furnace having a heat treatment chamber; injecting gas into a flexible expansion member having an expansion control chamber via a driving member, so that the flexible expansion member can expand to abut against the support frame or partially or completely enclose the support frame; and forming a ventilation chamber with the heat treatment chamber that at least partially encloses the support frame; injecting argon gas into the ventilation chamber and discharging other gases in the ventilation chamber via an atmosphere control member; after the flexible expansion member expands, the volume of the flexible expansion member in the heat treatment chamber increases, so that the volume of the ventilation chamber is smaller than the volume of the heat treatment chamber.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. By completely enclosing the roll core with the roll body, the roll of this application only needs to have its outer wall surface heated during heat treatment to increase the hardness of the roll body, thus making heat treatment easier and more conducive to improving the quality of this application.

[0029] 2. By using flexible expansion components to fill the heat treatment chamber, ensuring that most or all of the space in the heat treatment chamber is filled with flexible expansion components, and then injecting argon gas into the heat treatment chamber, it is possible to inject argon gas under vacuum conditions. This better ensures the injection rate and purity of argon gas in the heat treatment chamber, improves the protection of the composite roll to be heat treated, and thus improves product quality. Attached Figure Description

[0030] Figure 1 This is an overall schematic diagram according to one embodiment of this application;

[0031] Figure 2 This is a structural schematic diagram of a part of the embodiment, mainly showing... Figure 1 The internal structure of the control door after disassembly;

[0032] Figure 3 This is a structural diagram of a part of the embodiment, mainly showing the structure of the connecting frame and the stop;

[0033] Figure 4 This is a structural schematic diagram of a part of the embodiment, mainly showing... Figure 1 sectional structure;

[0034] Figure 5 This is another embodiment of the structure inside the mounting chamber, mainly a cross-sectional plan view;

[0035] Figure 6 yes Figure 5 Enlarged view of part A;

[0036] Figure 7 This is a structural schematic diagram as part of another embodiment, mainly showing the structure when a connecting groove is formed in the push rod, primarily a cross-sectional planar schematic diagram;

[0037] Figure 8 yes Figure 7 Enlarged view of part F;

[0038] Figure 9 This is a structural schematic diagram as part of an embodiment, mainly showing the structure of the pneumatic components and some surrounding parts;

[0039] Figure 10 yes Figure 9 Enlarged view of part B;

[0040] Figure 11 This is a structural schematic diagram as part of an embodiment, mainly showing an observation from another perspective. Figure 9 The structure was altered by removing the highly elastic rubber membrane;

[0041] Figure 12 yes Figure 11 Enlarged view of part C;

[0042] Figure 13 This is a structural schematic diagram as part of an embodiment, mainly showing the overall structure of the embodiment that forms the inner cavity of the door body in the control door;

[0043] Figure 14This is a structural schematic diagram as part of an embodiment, mainly showing an observation from another perspective. Figure 13 The structure;

[0044] Figure 15 This is a structural schematic diagram of a part of the embodiment, mainly showing... Figure 13 sectional structure;

[0045] Figure 16 yes Figure 15 Enlarged view of part D;

[0046] Figure 17 This is a structural schematic diagram as part of an embodiment, mainly showing the structure when a highly elastic rubber membrane expands to form a sealing part;

[0047] Figure 18 This is a structural schematic diagram of a part of the embodiment, mainly showing... Figure 17 A plan view;

[0048] Figure 19 This is a structural schematic diagram of a part of the embodiment, mainly showing the schematic structure of the position of some parts when the first annular opening and the second annular opening are formed;

[0049] Figure 20 This is a structural schematic diagram of a part of the embodiment, mainly showing... Figure 13 A schematic diagram of the high-elasticity rubber membrane forming a vacuum insulation chamber;

[0050] Figure 21 yes Figure 20 Enlarged view of part E.

[0051] Figure label:

[0052] 1. Heat treatment furnace; 11. Heat treatment chamber; 111. Ventilation chamber; 12. Control door; 121. Door inner cavity; 13. Load-bearing structure; 14. Support frame; 141. Accommodation space; 142. Support plate; 143. Storage area; 144. Air area; 15. Sealing part; 151. Abutment surface; 152. Protrusion; 16. Mounting chamber; 17. Connection port; 18. Vacuum insulation chamber;

[0053] 2. Flexible expansion component; 21. Expansion control chamber; 22. High-elasticity rubber diaphragm;

[0054] 3. Drive component; 31. Pump body; 32. Pushing structure; 33. Electric component; 34. Push rod; 341. Insertion part; 342. Connecting groove; 35. Abutment frame; 36. Spring; 37. Push plate; 371. Snap ring; 38. Pneumatic component;

[0055] 4. Atmosphere control components;

[0056] 5. Baffle; 51. First annular opening; 52. Second annular opening; 53. First baffle structure; 531. First sealing surface; 54. Second baffle structure; 541. Mounting port; 542. Groove; 543. Second sealing surface; 544. First recessed groove; 545. Second recessed groove; 55. Thermal insulation component;

[0057] 6. Connecting frame;

[0058] 7. Limiting components. Detailed Implementation

[0059] The following is in conjunction with the appendix Figure 1-21 This application will be described in further detail.

[0060] Example 1

[0061] A high-vanadium, high-niobium alloy composite roll is provided, comprising a roll body and a roll core; an inner groove is formed in the middle of the roll body, and the roll core is located in the inner groove so that the roll body completely encloses the roll core; the roll body is composed of the following materials: carbon 1.0%-1.5%; silicon 0.8%-1.2%; manganese 0.3%-1.0%; chromium 7.5%-10.0%; molybdenum 1.0%-2.0%; vanadium 2.5%-5.0%; niobium 0.8%-2.0%; the remainder being iron; the roll core is made of high-toughness cast steel. Preferably, the roll core is made of low-carbon steel or medium-speed steel.

[0062] By adopting the above technical solution, the roller body completely encloses the roller core, which is made of a highly tough material. The addition of materials such as chromium, vanadium, and niobium to the roller body increases its hardness. Therefore, this application primarily involves a high-hardness outer layer completely enclosing a high-toughness inner layer. This means that during heat treatment, only the roller body is exposed, allowing for precise selection of the heat treatment temperature, resulting in better heat treatment effects and higher product quality.

[0063] Example 2

[0064] Mainly refer to the appendix Figure 1-24. A heat treatment device for the aforementioned high-vanadium, high-niobium alloy composite rolls, comprising: a heat treatment furnace 1, a flexible expansion member 2, a driving member 3, and an atmosphere control member 4. The heat treatment furnace 1 forms a heat treatment chamber 11 for heating the composite rolls, a control door 12 for controlling the opening and closing of the heat treatment chamber 11, and a support structure 13 for supporting a support frame 14. The control door 12 is hinged to the heat treatment furnace 1 and seals the heat treatment chamber 11. In this embodiment, the heat treatment chamber 11 is circular. The support structure 13 is disposed within the heat treatment chamber 11 and is a block structure used to place the support frame 14, preventing instability that could easily result from placing the support frame 14 directly within the circular heat treatment chamber 11. The support frame 14 is used to place the composite rolls to be heat-treated. The heat treatment furnace 1 of this application is primarily for heating and can be used at least in annealing and tempering heat treatment processes.

[0065] The flexible expander 2 is connected to the heat treatment furnace 1, and the flexible expander 2 is used to form an expansion control chamber 21. The flexible expander 2 is a flexible body, meaning a structure capable of deformation, and the expansion control chamber 21 is a cavity within the flexible expander 2. For reference, the flexible expander 2 can be considered as a balloon, and the expansion control chamber 21 is the cavity where the balloon's gas is located after inflation. For reference, the flexible expander 2 can also be considered as a closed food packaging bag, and the expansion control chamber 21 is a cavity within the food packaging bag. The driving member 3 is used to inject a fluid medium into the expansion control chamber 21, causing the flexible expander 2 to expand until it abuts against or partially or completely encloses the support frame 14, so that the flexible expander 2 and the heat treatment furnace 11 form a ventilation chamber 111 that at least partially encloses the support frame 14. In this embodiment, when the flexible expander 2 is a balloon or a food packaging bag, it is in a contracted state during expansion. The fluid medium used is gas or water, preferably air, and more preferably argon. The driving component 3 is a pump body 31 connected to an external storage tank. The storage tank stores the fluid medium, and the pump body 31 injects the fluid medium from the storage tank into the expansion control chamber 21. In other embodiments, when air is used as the fluid medium, the pump body 31 can be directly connected to the external environment to inject air into the expansion control chamber 21.

[0066] Atmosphere control unit 4 is used to inject argon gas into the ventilation chamber 111 and to discharge other gases from the ventilation chamber 111. Atmosphere control unit 4 is disposed on the side of the heat treatment furnace 1, and two atmosphere control units 4 are provided. One is used to inject argon gas into the heat treatment chamber 11, and the other is used to discharge air from the heat treatment chamber 11. Specifically, atmosphere control unit 4 includes a pump body 31, a delivery pipeline, and an argon gas storage tank. The pump body 31 injects gas from the argon gas storage tank into the heat treatment chamber 11 through the delivery pipeline, or the pump body 31 discharges air from the heat treatment chamber 11 through the delivery pipeline. Preferably, the delivery pipeline connects the pump body 31 to the heat treatment chamber 11. More preferably, part of the delivery pipeline extends to the support frame 14, and after the flexible expansion member 2 expands, the delivery pipeline connects to the ventilation chamber 111. After the flexible expansion member 2 expands, the volume of the flexible expansion member 2 in the heat treatment chamber 11 increases, so that the volume of the ventilation chamber 111 is smaller than the volume of the heat treatment chamber 11.

[0067] In this embodiment, the flexible expansion member 2 is directly disposed in the heat treatment chamber 11. The flexible expansion member 2 is made of high temperature resistant material, and its performance will not be affected when the heat treatment chamber 11 is heated to a high temperature.

[0068] By adopting the above technical solution, the composite roll to be heat-treated is heat-treated in an argon atmosphere. Argon can be used to protect the composite roll to be heat-treated, thus providing better protection. In addition, by using the expansion member 2 to expand in the heat treatment chamber 11, the volume of the heat treatment chamber 11 can be reduced, thereby reducing the amount of air in contact with the composite roll to be heat-treated placed on the support frame 14. Then, when the air in the heat treatment chamber 11 is subsequently replaced with argon, it can be carried out in a smaller ventilation chamber 111, which can greatly shorten the time required to complete the argon gas replacement, thereby saving the amount of argon used and reducing the amount of argon emitted into the air. After the ventilation chamber 111 completes its ventilation, the flexible expansion member 2 contracts, and argon gas is slowly introduced into the heat treatment chamber 11. This allows argon gas to be filled into a very small ventilation chamber 111 first, accelerating the ventilation speed, and then the ventilation chamber 111 is gradually enlarged until it becomes the heat treatment chamber 11. At this point, the introduced argon gas does not require a ventilation process. This not only accelerates the filling speed of argon gas into the heat treatment chamber 11 but also greatly improves the purity of the argon gas in the heat treatment chamber 11, better protecting the heat-treated composite rolls and improving product quality.

[0069] Specifically, the support frame 14 has multiple layers of accommodating spaces 141, with support plates 142 formed on the support frame 14. Multiple support plates 142 are provided, and the area between any two support plates 142 is an accommodating space 141, thus forming multiple accommodating spaces 141 from multiple support plates 142. After the composite roll to be heat-treated is placed on the support plate 142, each layer of the accommodating space 141 forms a storage area 143 for placing the composite roll to be heat-treated and an air area 144 for not placing the composite roll to be heat-treated. The storage area 143 is the space occupied by the heat-treated space, and the air area 144 is the space not occupied by the composite roll to be heat-treated. The support frame 14 has multiple layers of accommodating spaces 141 to accommodate more composite rolls to be heat-treated. Since the composite rolls to be heat-treated are bar stock, gaps will exist after stacking, preventing complete filling of the accommodating spaces 141, thus forming the storage area 143 and the air area 144. However, when there are only one or two composite rolls to be heat-treated in each accommodating space 141, there is no need to stack the composite rolls to be heat-treated, so no gap will be generated. However, there will be a gap between the composite roll to be heat-treated and the support plate 142, so the accommodating space 141 cannot be filled. Therefore, a storage area 143 and an air area 144 will be generated in any case.

[0070] The flexible expander is used to form a shape-variable sealing portion 15, which is one end of the flexible expander facing the support frame 14. After the flexible expander expands, the sealing portion 15 forms an abutment surface 151 that contacts the support frame 14. The abutment surface 151 formed after the flexible expander expands contacts the support frame 14, thereby wrapping the support frame 14 around its perimeter. This makes the ventilation chamber 111 a plurality of receiving spaces 141 within the support frame 14, thus better reducing the volume of the ventilation chamber 111.

[0071] An air region 144 protrusion 152 is formed on the abutment surface 151, which is partially or completely embedded in the receiving space 141. The abutment surface 151 is the surface that matches the shape of the support frame 14 after the outer wall surface of the flexible expansion member 2 abuts against the support frame 14, and the protrusion 152 is the part that protrudes from the abutment surface 151 after the flexible expansion member 2 expands. After the flexible expander 2 expands, the protrusion 152 formed will also be embedded in the air area 144 of the accommodating space 141, so that the ventilation chamber 111 is only the storage area 143 or the storage area 143 and part of the air area 144. Then the ventilation chamber 111 can be used to provide a near-vacuum environment for the heat treatment chamber 11. In addition to the composite roll to be heat treated, there is almost no other gas in the ventilation chamber 111. When argon is injected, it can better replace other gases in the ventilation chamber 111, better ensure the speed of argon filling into the heat treatment chamber 11 and better improve the purity of argon in the heat treatment chamber 11.

[0072] Example 3

[0073] See attached document Figure 3 , 5 -12, the difference from Embodiment 2 is that: an installation chamber 16 is also formed in the heat treatment furnace 1. The installation chamber 16 is connected to the heat treatment chamber 11 through a connection port 17. The connection port 17 is provided with a stop 5, which is a plate in this embodiment. The driving member 3 is also used to drive the stop 5 to a first position that opens the connection port 17 and a second position that closes the connection port 17. The driving member 3 is also used to make the flexible expansion member 2 have an expanded state and a contracted state. The method of the flexible expansion member 2 being in the contracted state is that the driving member 3 draws out the fluid medium in the flexible expansion member 2. When the stop 5 moves to the first position, the flexible expansion member 2 is in the expanded state. When the stop 5 moves to the second position, the flexible expansion member 2 is in the contracted state. When the flexible expansion member 2 is in the expanded state, the volume of the flexible expansion member 2 in the heat treatment chamber 11 increases. When the flexible expansion member 2 is in the contracted state, the flexible expansion member 2 is completely contracted into the installation chamber 16. In this embodiment, the driving component 3 includes a pushing structure 32 and an air pump. The pushing structure 32 is one of an electric push rod, a hydraulic cylinder, and an air cylinder. The pushing structure 32 is used to drive the stop 5 to move to the first position and the second position. The air pump is used to inject or extract the fluid medium into the expansion control chamber 21.

[0074] The flexible expansion member 2 is accommodated in the mounting chamber 16. When heat treatment is required, the heat treatment chamber 11 will heat up. At this time, the flexible expansion member 2 will shrink completely into the mounting chamber 16. Then, the baffle 5 separates the mounting chamber 16 from the heat treatment chamber 11, keeps the heat treatment chamber 11 warm, and keeps the flexible expansion member 2 away from the high temperature environment, which can protect the flexible expansion member 2.

[0075] Example 4

[0076] See attached document Figure 3 , 5-12, the difference from Embodiment 3 is that: when the stop 5 is in the first position, the stop 5 is used to form a first annular opening 51 and a second annular opening 52 in the connection port 17. The outer ring of the first annular opening 51 is located inside the inner ring of the second annular opening 52. The first annular opening 51 is used for the flexible expansion member 2 to expand outward, so that the flexible expansion member 2 expands to form the abutment surface 151 and the protrusion 152. The second annular opening 52 is used for the flexible expansion member 2 to expand outward, so that the flexible expansion member 2 expands to the area between the support frame 14 and the heat treatment chamber 11; when the stop 5 is in the second position, the first annular opening 51 and the second annular opening 52 are closed.

[0077] The flexible expansion member 2, which expands outward from the second annular opening 52, expands until it contacts the support frame 14. It then expands further away from the axis of the second annular opening 52 until it abuts against the inner wall of the heat treatment chamber 11. It continues to extend along the air region 144 between the inner wall of the heat treatment chamber 11 and the support frame 14 until the flexible expansion member 2 extends from one end of the support frame 14 to the other end and contacts the control door 12. Finally, it extends towards the axis of the second annular opening 52 until it closes, completely enclosing the support frame 14 and forming the ventilation chamber 111. The specific shape and position of the flexible expansion member 2 after expansion are shown in the attached drawings. Figure 18 .

[0078] Furthermore, the flexible expansion member 2, which expands outward from the first annular opening 51, expands until it abuts against the support frame 14, and then expands away from the axis of the first annular opening 51 until it abuts against the flexible expansion member 2 expanding from the second annular opening 52; simultaneously, it also expands towards the axis of the first annular opening 51 to the position of the axis of the first annular opening 51. Then, the flexible expansion member 2 expands between the stop member 5 and the support frame 14, thereby forming a protrusion 152 of the air region 144 inserted into the support frame 14, so that most of the space of the heat treatment chamber 11 is filled by the flexible expansion member 2. The specific shape and position of the flexible expansion member 2 expanding outward from the first annular opening 51 after expansion are shown in the attached drawings. Figure 18 Then, a small ventilation chamber 111 is formed in the support frame 14 wrapped by the flexible expansion member 2, which is beneficial to increase the speed at which argon gas replaces other air in the heat treatment chamber 11.

[0079] One part of the flexible expansion member 2 will expand outward from the first annular opening 51, and another part of the flexible expansion member 2 will expand outward from the second annular opening 52. This avoids the flexible expansion member 2 needing to expand outward from one position to an excessively long length, thus preventing the flexible expansion member 2 from being easily damaged due to excessive expansion length. It also avoids the situation where the flexible expansion member 2 is difficult to expand to form the contact surface 151 and the protrusion 152, thus better ensuring the stability of the flexible expansion member 2 during use.

[0080] Specifically, when the driving member 3 moves the stop 5 from the second position to the first position, the driving member 3 also causes the flexible expansion member 2 to expand until it abuts against the side of the stop 5 away from the heat treatment chamber 11. When the driving member 3 is about to move the stop 5 so that the connection port 17 is about to open, the flexible expansion member 2 abuts against the side of the stop 5 away from the heat treatment chamber 11. Then, when the stop 5 opens, the flexible expansion member 2 expands outward directly from the positions of the first annular opening 51 and the second annular opening 52, or expands outward from the area between the stop 5 and the connection port 17, thereby keeping the connection port 17 closed. This prevents air in the heat treatment chamber 11 from entering the installation chamber 16 and prevents air in the installation chamber 16 from entering the heat treatment chamber 11. This allows for better replacement of the air in the heat treatment chamber 11 with argon gas. At the same time, it can ensure that the installation chamber 16 is always in a sealed state. In some cases, it can keep the gas in contact with the flexible expansion member 2 in the installation chamber 16 in a constant state. For example, in some cases, the flexible expansion member 2 may be damaged by contact with corrosive gases in the air. Therefore, the installation chamber 16 can be filled with a gas that will not damage the flexible expansion member 2, such as nitrogen. The installation chamber 16 is used to contain the nitrogen in contact with the flexible expansion member 2. Thus, no matter how the flexible expansion member 2 expands, the flexible expansion member 2 or the baffle 5 will close the connection port 17, making the installation chamber 16 and the heat treatment chamber 11 separate and independent from each other. This prevents other gases from entering the installation chamber 16 and strengthens the protection of the flexible expansion member 2.

[0081] Specifically, in some embodiments, the flexible expansion member 2 includes at least a highly elastic rubber membrane 22 capable of forming the expansion control chamber 21. The highly elastic rubber membrane 22 is sealed relative to the inner wall of the mounting chamber 16, so that the expansion control chamber 21 is formed by the highly elastic rubber membrane 22 and the inner wall of the mounting chamber 16. When the stop 5 is in the second position, the drive member 3 draws the fluid medium away from the expansion control chamber 21, so that the flexible expansion member 2 is in a contracted state; when the flexible expansion member 2 is in the contracted state, a vacuum insulated chamber 18 is formed between the highly elastic rubber membrane and the stop 5. To create a vacuum chamber between the high-elasticity rubber membrane 22 and the stop 5, the contact point between the high-elasticity rubber membrane 22 and the inner wall of the mounting chamber 16 is away from the stop 5. Then, the mounting chamber 16 on the side of the high-elasticity rubber membrane 22 away from the stop 5 is subjected to negative pressure, causing the high-elasticity rubber membrane 22 to move away from the stop 5, thus forming the stop 5. In this embodiment, the high-elasticity rubber membrane 22 is preferably fixedly connected to the inner wall of the mounting chamber 16. A vacuum insulation chamber 18 is formed between the stop 5 and the high-elasticity rubber membrane 22. Using this vacuum chamber for insulation better blocks heat transfer, preventing the high-elasticity rubber membrane 22 from contacting the stop 5. Furthermore, the vacuum between them better prevents the high-elasticity rubber membrane 22 from being stored at high temperatures, thus better protecting it.

[0082] Example 5

[0083] The difference from Example 4 is as follows:

[0084] The method of forming the expansion control chamber 21 by the high elastic rubber membrane 22 is that the edges of the high elastic rubber membrane 22 are self-connected, so that the high elastic rubber membrane 22 self-wraps to form a closed chamber, which is the expansion control chamber 21.

[0085] Example 6

[0086] The difference from Example 5 is as follows:

[0087] See attached document Figure 13-15Both the flexible expansion member 2 and the driving member 3 are provided in two sets. The control door 12 is provided with a door inner cavity 121, in which one set of the flexible expansion member 2 is provided in the door inner cavity 121, and the other set of flexible expansion member 2 is provided in the mounting chamber 16; two stop members 5 are provided, one stop member 5 is located between the door inner cavity 121 and the heat treatment chamber 11, and the other stop member 5 is located between the mounting chamber 16 and the heat treatment chamber 11; when the stop member 5 is in the first position, the two sets of flexible expansion members 2 are joined to form the ventilation chamber 111 that can completely enclose the support frame 14. By setting up two sets of flexible expansion members 2 and two sets of driving members 3, when the flexible expansion members 2 expand, they can expand simultaneously in two directions toward the support frame 14. Thus, the degree of expansion required by two flexible expansion members 2 is less than that required by one flexible expansion member 2. This makes it easier for the flexible expansion members 2 to form a ventilation chamber 111 that wraps around the support frame 14, and also better ensures the sealing of the ventilation chamber 111. As a result, when filling with argon gas later, the injection of argon gas can be completed more quickly and the purity of argon gas can be guaranteed.

[0088] Example 7

[0089] The difference from Example 6 is as follows:

[0090] See attached document Figure 13-21 The stop 5 includes a first baffle structure 53 and a second baffle structure 54; the second baffle structure 54 forms a mounting opening 541 in its middle. The first baffle structure 53 is used to embed into the mounting opening 541 when the stop 5 is in the second position and to form a first annular opening 51 in the mounting opening 541 when the baffle is in the first position; the second baffle structure 54 is used to embed into the connecting opening 17 when the stop 5 is in the second position and to form a second annular opening 52 in the connecting opening 17 when the baffle is in the first position. In this embodiment, two pushing structures 32 are provided, one for pushing the first baffle structure 53 to move and the other for pushing the second baffle structure 54 to move. By utilizing the mutual movement between the first baffle structure 53 and the second baffle structure 54, a first annular opening 51 is formed between the first baffle structure 53 and the mounting port 541, and a second annular opening 52 is formed between the second baffle structure 54 and the connecting port 17. This makes it easier to form the first annular opening 51 and the second annular opening 52, and easier to close them. The pushing structure 32 uses an electric push rod.

[0091] The inner wall of the mounting port 541 forms a first sealing surface 531, and the outer wall of the first baffle structure 53 forms a second sealing surface 543. Both the first sealing surface 531 and the second sealing surface 543 are inclined surfaces, so that when the first baffle structure 53 is inserted into the mounting port 541, the first sealing surface 531 and the second sealing surface 543 abut against each other. The inclined surface increases the contact area between the first sealing surface 531 and the second sealing surface 543, thereby increasing the sealing performance. Similarly, the inner wall of the connecting port 17 forms a third sealing surface, and the outer wall of the second baffle structure 54 forms a fourth sealing surface. Both the third and fourth sealing surfaces are inclined surfaces, thus also increasing the sealing performance between the second baffle structure 54 and the connecting port 17.

[0092] More specifically, in this embodiment, since the pushing structure 32 needs to move the first baffle structure 53 and the second baffle structure 54, the pushing structure 32 needs to contact the first baffle structure 53 and the second baffle structure 54. A highly elastic rubber membrane 22 exists between them and is fixed to the first baffle structure 53 and the second baffle structure 54 to allow the highly elastic rubber membrane 22 to expand outward normally. To provide heat insulation between the highly elastic rubber membrane 22 and the first baffle structure 53 and the second baffle structure 54, heat insulation components 55 are provided on the first baffle structure 53 and the second baffle structure 54. The pushing structure 32 is connected to the highly elastic rubber membrane 22, the highly elastic rubber membrane 22 is connected to the heat insulation component 55, and the heat insulation component 55 is fixed to the first baffle structure 53 and the second baffle structure 54. This achieves the effect that although the highly elastic rubber membrane 22 is in contact with the first baffle structure 53 and the second baffle structure 54, the heat insulation component 55 can provide heat insulation between the first baffle structure 53 and the second baffle structure 54 and the highly elastic rubber membrane 22.

[0093] More specifically, in this embodiment, both the first baffle structure 53 and the second baffle structure 54 form grooves 542 for installing the heat insulation component 55. The heat insulation component 55 is an aerogel block or a block structure formed of aerogel particles.

[0094] Example 8

[0095] The difference from Example 7 is as follows:

[0096] See attached document Figure 13-21The high-elasticity rubber membrane 22 can slide relative to the inner wall of the mounting chamber 16. When the high-elasticity rubber membrane 22 expands outward from the first annular opening 51 and the second annular opening 52, the high-elasticity rubber membrane 22 moves towards the direction closer to the baffle 5, thereby allowing the high-elasticity rubber membrane 22 to expand outward more and increasing the degree of outward expansion. When the heat treatment chamber 11 is heated, the high-elasticity rubber membrane 22 moves away from the baffle 5, so that a vacuum insulation chamber 18 can be formed between the high-elasticity rubber membrane 22 and the baffle 5. The vacuum insulation chamber 18 is shown in the attached figure. Figure 21 .

[0097] The pushing structure 32 in this embodiment includes a connecting frame 6, which is used to install the high elastic rubber membrane 22. The connecting frame 6 is located at the end of the high elastic rubber membrane 22 away from the stop 5. Three pushing structures 32 are provided. All three pushing structures 32 are electric push rods. The first pushing structure 32 is used to push the first baffle structure 53 to move, the second pushing structure 32 pushes the second baffle structure 54 to move, and the third pushing structure 32 pushes the connecting frame 6 to move. When the high-elasticity rubber membrane 22 expands outward, the first baffle structure 53 and the second baffle structure 54 move, forming a first annular opening 51 and a second annular opening 52 on the first baffle structure 53 and the second baffle structure 54. Then the support frame 14 moves, and the connecting frame 6 moves close to the first baffle structure 53 and the second baffle structure 54. This causes the high-elasticity rubber membrane 22 to move towards the first baffle structure 53 and the second baffle structure 54, placing the high-elasticity rubber membrane 22 closer to the heat treatment chamber 11. This allows the high-elasticity rubber membrane 22 to expand outward more effectively from the first annular opening 51 and the second annular opening 52.

[0098] In addition, the outward expansion of the high elastic rubber membrane 22 from the first annular opening 51 is mainly due to the outward expansion of the high elastic rubber membrane 22 between the first baffle structure 53 and the second baffle structure 54, and the outward expansion of the high elastic rubber membrane 22 from the second annular opening 52 is mainly due to the outward expansion of the high elastic rubber membrane 22 between the second baffle structure 54 and the inner wall of the mounting chamber 16. Since the rubber membrane expanding outward from the first annular opening 51 is only used to fill the air area 144 in the support frame 14, and the volume of the air area 144 in the support frame 14 is relatively small, the high elasticity rubber membrane 22 between the first baffle structure 53 and the second baffle structure 54 can be directly used to expand outward. However, the high elasticity rubber membrane 22 expanding outward from the second annular opening 52 is mainly used to wrap the support frame 14. Therefore, the volume of the high elasticity rubber membrane 22 required to wrap the support frame 14 will be larger, and the degree of expansion of the high elasticity rubber membrane 22 will be higher. Therefore, by moving the connecting frame 6 closer to the first baffle structure 53 and the second baffle structure 54, more high elasticity rubber membrane 22 can be used to expand outward from the second annular opening 52, so that it can expand more and wrap the support better.

[0099] Specifically, a first recessed groove 544 and a second recessed groove 545 are formed on the second baffle structure 54. The first recessed groove 544 is used to connect with the first baffle structure 53, and the second recessed groove 545 is used to connect with the mounting chamber 16. Therefore, the first recessed groove 544 will increase the amount of highly elastic rubber membrane 22 between the first baffle structure 53 and the second baffle structure 54. Although the highly elastic rubber membrane 22 can be stacked between the first baffle structure 53 and the second baffle structure 54, this would make it difficult for the highly elastic rubber membrane 22 to expand when the first baffle structure 53 and the second baffle structure 54 are opened, potentially causing the first annular opening 51 and the second annular opening 52 to fail to seal. Therefore, in this embodiment, the requirement to allow the highly elastic rubber membrane 22 to expand outwards is to ensure that the first baffle structure 53 and the second baffle structure 54 seal the first annular opening 51 and the second annular opening 52 when they are opened. Therefore, in this embodiment, the purpose of the first recessed groove 544 and the second recessed groove 545 is to increase the size of the high elastic rubber membrane 22, so that the high elastic rubber membrane 22 can expand outward more.

[0100] In some other embodiments, the actuating structure 32 includes an electric component 33, a push rod 34, an abutment frame 35, and a spring 36. The electric component 33 is an electric push rod, and the push rod 34 is used to connect to the output end of the electric component 33. A collar is formed in the middle of the abutment frame 35, and an abutment ring is formed on the edge of the abutment frame 35. The abutment ring is used to fix the highly elastic rubber membrane 22. The groove 542 on the second baffle structure 54 is annular. The collar is fitted into the push rod 34, and the collar is slidably connected to the push rod, so that the abutment frame 35 is slidably connected to the push rod 34. Thus, the push rod 34 is used to guide the abutment frame 35. An additional connecting frame 6 is fixedly connected to the push rod 34, so that the connecting frame 6 moves together with the push rod 34. The push rod 34 is used to fix together with the first baffle structure 53. Thus, the first baffle structure 53 and the connecting frame 6 move together. When the second baffle structure 54 needs to move outward, there is a sufficient high-elasticity rubber membrane 22 between the second baffle structure 54 and the mounting chamber 16. The spring 36 is sleeved on the push rod 34, and an end is formed on the connecting frame 6, which is used to contact one end of the spring 36. So when the first baffle structure 53 moves outward, the first baffle structure 53 pushes the second baffle structure 54 outward through the connecting frame 6 and the spring 36.

[0101] More specifically, when the first baffle structure 53 and the second baffle structure 54 are closed, the spring 36 is located between the abutment frame 35 and the connecting frame 6, and the length of the spring 36 is less than the distance between the abutment frame 35 and the connecting frame 6. Then, when the subsequent electric component 33 drives the push rod 34 to move, the first baffle structure 53 moves outward. When the first baffle structure 53 moves outward to form a first annular opening 51 between the first baffle structure 53 and the second baffle structure 54, the connecting frame 6 contacts the spring 36, and the abutment frame 35 contacts the spring 36. Then, the first baffle structure 53 continues to move outward, and the connecting frame 6, through the spring 36, will drive the abutment frame 35 to move outward together, thereby opening the second baffle structure 54. Thus, a single electric component 33 can simultaneously move the first baffle structure 53, the second baffle structure 54, and the connecting frame 6. This also better ensures that fewer electric components are placed in a smaller space within the installation chamber 16, facilitating wiring. More specifically, the push rod 34, connecting frame 6, abutment frame 35, and spring 36 are all located in the expansion control chamber 21. Thus, the edges of the high-elasticity rubber diaphragm 22 are joined to form the expansion control chamber 21. Therefore, only an external drive is needed to move the push rod 34, enabling the high-elasticity rubber diaphragm 22 to move closer to and further away from the stop 5, resulting in more stable control of the high-elasticity rubber diaphragm 22.

[0102] In some designs, the push rod 34 forms an insertion portion 341 on the connecting frame 6. A highly elastic rubber membrane 22 wraps around the insertion portion 341 and is fixed to it, thus forming an outwardly protruding part on the outside of the highly elastic rubber membrane 22. Additionally, a retaining ring 371 is provided at the output end of the electric component 33. The retaining ring 371 fits onto the insertion portion 341, and the retaining ring 371 is tightly fitted to the insertion portion 341. The retaining ring 371 is fixed to the highly elastic rubber membrane 22 at the position of the insertion portion 341 and to the insertion portion 341. The electric component 33 directly drives the retaining ring 371 to move, thereby moving the push rod 34. This ensures that the interior of the highly elastic rubber membrane 22 is a completely sealed unit, while also enabling the movement of the first baffle structure 53, the second baffle structure 54, and the connecting frame 6.

[0103] In other embodiments, the electric component 33 includes a push plate 37 and a pneumatic element 38, wherein the pneumatic element 38 is an air pump. The air pump element injects air into and withdraws from the mounting chamber 16 through a pipeline, thereby the pneumatic element 38 injects air into the mounting chamber 16 away from the stop 5. As the gas volume increases or decreases, the push plate 37 moves within the mounting chamber 16, moving closer to or away from the stop 5. The push plate 37 is provided with a locking slot, in which a retaining ring 371 as described in the above embodiments is installed, thereby fixing the push plate 37 to the push rod 34 and the high-elasticity rubber diaphragm 22. During the movement of the push plate 37 within the mounting chamber 16, it will drive the push rod 34 to move together. Since the space of the installation chamber 16 is limited, the driving mechanism of the electric push rod is related to the length of the electric push rod. The cylinder and hydraulic cylinder are also related to the length. Therefore, by using the air injection and air extraction driving method, the size limitation of the installation chamber 16 can be avoided, and the movement stroke of the push plate can be controlled automatically.

[0104] In other embodiments, a connecting groove 342 is provided in the middle of the push rod 34. After the high-elasticity rubber membrane 22 is wrapped around the insertion part 341, there is a notch in the middle of the high-elasticity rubber membrane 22, which communicates with the connecting groove 342. The connecting groove 342 communicates with the expansion control chamber 21, thereby enabling the pneumatic element 38 in the above embodiments to also introduce air into the expansion control chamber 21. Thus, both the push plate 37 and the expansion control chamber 21 are controlled. Preferably, two pneumatic elements 38 are provided, one of which is used to control the movement of the push plate 37, and the other is used to control the expansion and contraction of the expansion control chamber 21 through the notch and the connecting groove 342.

[0105] In the above scheme, the edge of the connecting frame 6 is pressed against the inner wall of the mounting chamber 16, thereby pressing the highly elastic rubber membrane 22 against the inner wall of the mounting chamber 16.

[0106] Example 9

[0107] The difference from the above embodiments is as follows:

[0108] Since the expansion degree of the highly elastic rubber membrane 22 is limited, when the protrusion 152 is formed on the highly elastic rubber membrane 22, the protrusion 152 can only be partially embedded in the air region 144. Furthermore, after the highly elastic rubber membrane 22 is partially embedded in the air region 144, the expansion degree of the highly elastic rubber membrane 22 reaches its limit, making it difficult for the highly elastic rubber membrane 22 to completely fill the air region 144. Therefore, in this embodiment, an auxiliary expansion body is formed on the flexible expansion member 2 to solve this problem.

[0109] The auxiliary expander forms an auxiliary chamber capable of expansion and contraction; the flexible expander 2 and the auxiliary expander are connected by an elastic clamping structure; the elastic clamping structure is used to form a connecting chamber; the clamping structure is used to configure the connecting chamber so that when the pressure in the expansion control chamber 21 is greater than a preset pressure, the auxiliary chamber is connected to the expansion control chamber 21. Specifically, the auxiliary expander and the high-elasticity rubber membrane 22 in this solution are the same. The auxiliary expander is a fabric that has been stretched and deformed, and its edge is fixed to the high-elasticity rubber membrane 22. The high-elasticity rubber membrane 22 has vent holes, which are blocked by the auxiliary expander. Then, the clamping structure seals the vent holes, so that under normal conditions, only the high-elasticity rubber membrane 22 will expand, while the auxiliary expander will not expand.

[0110] In some designs, the tightening structure uses a pressure valve that opens when the pressure in the high-elasticity rubber diaphragm 22 exceeds a preset pressure, allowing gas in the high-elasticity rubber diaphragm 22 to enter the auxiliary expander, at which point the auxiliary expander begins to expand.

[0111] In other solutions, the tightening structure uses a high-elasticity rubber sleeve, which is fixed to the vent hole. The high-elasticity rubber sleeve uses its own elasticity to keep the vent hole blocked, and when the pressure in the high-elasticity rubber membrane 22 exceeds the preset pressure, it is stretched open, so that the gas in the high-elasticity rubber membrane 22 enters the auxiliary expansion body, at which point the auxiliary expansion body begins to expand.

[0112] When the auxiliary chamber cannot expand, and the pressure in the auxiliary chamber has reached the preset pressure, the auxiliary expander can expand. The auxiliary expander can continue to expand and reach a position that the flexible expander 2 cannot reach, so that the air chamber can be filled more by the flexible expander 2 or the auxiliary expander. This better ensures that the ventilation chamber 111 contains only the storage area 143 and a very small air area 144, thus exchanging the air into argon faster. In some cases, the ventilation chamber 111 can also be kept in a vacuum state as much as possible. The ventilation chamber 111 contains only the support frame 14 and the composite roll to be heat-treated, which is more conducive to increasing the argon injection speed and the purity of argon in the heat treatment chamber 11.

[0113] See attached document Figure 21 In some other embodiments, a limiting plate is provided on the push rod 34. Part of the push rod 34 is a non-retractable rod, and part is a retractable rod. A limiting member 7, which is a plate, is provided on the non-retractable rod of the push rod 34. The push plate 37 is fixed to the retaining ring 371, and the retaining ring 371 is fixed to the retractable rod portion. When the push plate 37 moves closer to the stop 5, it first drives the connecting frame 6 to move, causing the highly elastic rubber mold portion to move towards the stop 5. When in contact with the limiting member 7, the push plate 37 drives the non-extendable part of the push rod 34 to move through the connecting frame 6 and the limiting member 7, thereby starting to drive the first baffle structure 53 to move. Subsequently, the limiting member 7 on the push rod 34 contacts the spring 36, the spring 36 is compressed, the spring 36 pushes the abutment frame 35 to move, and the abutment frame 35 drives the second baffle structure 54 to move, thereby realizing the movement of the first baffle structure 53 and the second baffle structure 54, and forming the first annular opening 51 and the second annular opening 52.

[0114] The purpose of this embodiment is to enable the high-elasticity rubber membrane 22 to move independently. In the previous embodiment, the push plate 37 moved together with the push rod 34. Therefore, when the first baffle structure 53 moved, the high-elasticity rubber membrane 22 also moved. Consequently, when the first baffle structure 53 closed, the high-elasticity rubber membrane 22 immediately stopped moving. Thus, when forming the vacuum insulation chamber 18, the control relied entirely on the negative pressure state of the expansion chamber within the high-elasticity rubber membrane 22, resulting in slightly insufficient control. In this embodiment, after the first baffle structure 53 closed, the push plate 37 and the connecting member can continue to move the high-elasticity rubber membrane 22 away from the baffle 5, thereby facilitating better formation of the vacuum insulation chamber 18. More specifically, the retractable rod is an elastic rod, composed of a telescopic rod and a tension spring. The tension spring is fixed to both ends of the telescopic rod. When forming the vacuum insulation chamber 18, the tension spring is in a stretched state; when the first annular opening 51 and the second annular opening 52 are open, the tension spring is in a normal state.

[0115] Example 10

[0116] A heat treatment process for the aforementioned high-vanadium, high-niobium alloy composite roll; the heat treatment process includes: placing a support frame 14 for holding the composite roll to be heat-treated into a heat treatment furnace 1 having a heat treatment chamber 11; injecting gas into a flexible expansion member 2 having an expansion control chamber 21 via a driving member 3, so that the flexible expansion member 2 can expand to abut against or partially or completely enclose the support frame 14; and forming a ventilation chamber 111 that at least partially encloses the support frame 14 with the heat treatment chamber 11; injecting argon gas into the ventilation chamber 111 via an atmosphere control member 4 and discharging other gases from the ventilation chamber 111; after the flexible expansion member 2 expands, the volume of the flexible expansion member 2 in the heat treatment chamber 11 increases, so that the volume of the ventilation chamber 111 is smaller than the volume of the heat treatment chamber 11.

[0117] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A heat treatment apparatus for preparing high-vanadium, high-niobium alloy composite rolls, characterized in that, include: The heat treatment furnace is used to form a heat treatment chamber for heating composite rolls, a control door for controlling the opening and closing of the heat treatment chamber, and a load-bearing structure for supporting the support frame; The load-bearing structure is disposed in the heat treatment chamber, and the support frame is used to place the composite roll to be heat treated. A flexible expansion member is connected to the heat treatment furnace, and the flexible expansion member is used to form an expansion control chamber; A driving component is used to inject a fluid medium into the expansion control chamber to cause the flexible expander to expand to partially or completely enclose the support frame, so that the flexible expander and the heat treatment chamber form a ventilation chamber that at least partially encloses the support frame. An atmosphere control device for injecting argon gas into the ventilation chamber and venting air from the ventilation chamber; After the flexible expander expands, its volume in the heat treatment chamber increases, making the volume of the ventilation chamber smaller than that of the heat treatment chamber. This reduces the amount of air in contact with the composite roll to be heat-treated placed on the support frame. Therefore, when the air in the heat treatment chamber is subsequently replaced with argon, it can be done in a smaller ventilation chamber, significantly shortening the time required for argon gas replacement, thus saving argon gas consumption and reducing the amount of argon gas emitted into the air. The support frame has multiple layers of storage space; each layer of storage space forms a storage area for placing the composite roll to be heat-treated and an air area where no composite roll to be heat-treated is placed. The flexible expander is used to form a seal with a variable shape; after the flexible expander expands, the seal forms an abutment surface that contacts the support frame, and an air region protrusion that is partially or completely embedded in the receiving space is formed on the abutment surface. The heat treatment furnace also includes an installation chamber; the installation chamber is connected to the heat treatment chamber via a connection port. The connection port is provided with a stop; the driving member is also used to drive the stop to a first position to open the connection port and a second position to close the connection port; The driving component is also used to give the flexible expansion member an expanded state and a contracted state; When the stopper moves to the first position, the flexible expansion member is in the expanded state; when the stopper moves to the second position, the flexible expansion member is in the contracted state. When the flexible expansion member is in the expanded state, the volume of the flexible expansion member in the heat treatment chamber increases; When the flexible expansion member is in the contracted state, the flexible expansion member is completely contracted into the mounting chamber; When the stop is in the first position, the stop is used to form a first annular opening and a second annular opening in the connection port; the outer ring of the first annular opening is located inside the inner ring of the second annular opening; The first annular opening is used to allow the flexible expansion member to expand outward, so that the flexible expansion member expands to form the contact surface and the protrusion; The second annular opening is used to allow the flexible expansion member to expand outward, so that the flexible expansion member expands to the area between the support frame and the heat treatment chamber; When the stop is in the second position, the first annular opening and the second annular opening are closed.

2. The heat treatment equipment for preparing high-vanadium, high-niobium alloy composite rolls according to claim 1, characterized in that: When the driving member moves the stop member from the second position to the first position, the driving member also causes the flexible expansion member to expand until it abuts against the side of the stop member that is away from the heat treatment chamber.

3. The heat treatment equipment for preparing high-vanadium, high-niobium alloy composite rolls according to claim 1, characterized in that: The flexible expansion member includes at least a highly elastic rubber mold capable of forming the expansion control chamber; When the stop is in the second position, the drive member draws the fluid medium away from the expansion control chamber, so that the flexible expansion member is in a contracted state; When the flexible expansion member is in the contracted state, a vacuum heat-insulating chamber is formed between the highly elastic rubber mold and the stop member.

4. The heat treatment equipment for preparing high-vanadium, high-niobium alloy composite rolls according to claim 1, characterized in that: Both the flexible expansion member and the driving member are provided in two sets; The control door is provided with a door inner cavity, one set of the flexible expansion members is provided in the door inner cavity, and another set of flexible expansion members is provided in the installation chamber; Two stops are provided, one of which is located between the inner cavity of the door and the heat treatment chamber, and the other is located between the installation chamber and the heat treatment chamber; When the stop is in the first position, the two sets of flexible expansion members dock to form the ventilation chamber that can fully enclose the support frame.

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