Openable and closable heat preservation device for vacuum high-temperature sintering furnace

Abstract

The invention relates to the technical field of metal powder high-temperature sintering equipment, in particular to an openable heat preservation device for a vacuum high-temperature sintering furnace, which comprises a sintering furnace, a control mechanism is mounted outside the sintering furnace, a heat preservation furnace body is arranged inside the sintering furnace, a heat preservation cover, a lifting connecting rod and a hand wheel are mounted on the heat preservation furnace body, and the heat preservation cover is connected with the sintering furnace through the lifting connecting rod. Accurate opening and closing of the heat preservation cover are achieved through the lifting connecting rod and the hand wheel, heat leakage and external gas invasion are effectively prevented by combining the combined action of the multiple heat insulation layers and a plurality of sealing rings and elastic supporting pieces in the sealing assembly, and the heat preservation effect is remarkably improved; the arranged control mechanism automatically controls the hand wheel to rotate according to feedback signals of the position sensor, so that the heat preservation cover is accurately opened and closed, manual participation is reduced, the safety of the device is improved, and the requirements of modern industry for efficient and reliable sintering equipment are met.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature sintering equipment for metal powders, and particularly to an openable and closable heat preservation device for a vacuum high-temperature sintering furnace. Background Art

[0002] With the wide application of vacuum high-temperature sintering technology, as an important part of the sintering furnace, the performance of the heat preservation device directly affects the efficiency of the sintering process and the product quality. However, the existing heat preservation devices still have deficiencies in aspects such as the opening and closing design, heat management, and the assembly method with the heat preservation furnace body. Excessive heat loss occurs during the opening and closing process of sintering, which limits the overall performance optimization of the sintering furnace.

[0003] Therefore, aiming at the deficiencies of the existing technology, it is very necessary to provide an openable and closable heat preservation device for a vacuum high-temperature sintering furnace to solve the deficiencies of the existing technology. Summary of the Invention

[0004] The purpose of the present invention is to provide an openable and closable heat preservation device for a vacuum high-temperature sintering furnace, avoiding the deficiencies of the existing technology. The precise opening and closing of the heat preservation cover are realized through the lifting connecting rod and the hand wheel. Combined with the common action of multiple heat insulation layers and multiple sealing rings and elastic support members in the sealing assembly, heat leakage and the intrusion of external gases are effectively prevented, significantly improving the heat preservation effect. At the same time, the set control mechanism automatically controls the rotation of the hand wheel according to the feedback signal of the position sensor, thereby realizing the precise opening and closing of the heat preservation cover, reducing manual participation, enhancing the safety of the device, and meeting the requirements of modern industry for efficient and reliable sintering equipment.

[0005] The above object of the present invention is achieved by the following technical means.

[0006] Provide an openable and closable heat preservation device for a vacuum high-temperature sintering furnace, including a sintering furnace, a control mechanism is installed outside the sintering furnace, a heat preservation furnace body is arranged inside the sintering furnace, a heat preservation cover, a lifting connecting rod and a hand wheel are installed on the heat preservation furnace body, the heat preservation cover is connected to the sintering furnace through the lifting connecting rod, one end of the lifting connecting rod is fixed on the heat preservation cover, the other end of the lifting connecting rod passes through the sintering furnace and is connected to the hand wheel, a scale mark is arranged on the lifting connecting rod, a sealing assembly is arranged at the edge of the sintering furnace, and the sealing assembly forms a dynamic seal with the upper opening of the sintering furnace;

[0007] The sealing assembly includes multiple sealing rings and elastic support members; the sealing ring assembly is distributed in sequence along the circumferential direction of the heat preservation furnace body and is connected to the inner wall of the sintering furnace through the elastic support members.

[0008] Specifically, the lifting connecting rod is connected to the sintering furnace through a threaded structure. When the hand wheel rotates, it drives the lifting connecting rod to move along the axial direction of the thread. A locking mechanism is arranged on the hand wheel. The locking mechanism includes a locking nut and a limiting block. The locking nut is sleeved on the rotating shaft of the hand wheel, and the limiting block is fixed on the top of the sintering furnace.

[0009] Further, the sealing assembly includes three sealing rings, namely a first sealing ring, a second sealing ring and a third sealing ring. The first sealing ring is in direct contact with the inner wall of the sintering furnace, the third sealing ring fits with the sealing surface of the sintering furnace, the second sealing ring is located between the first sealing ring and the third sealing ring, and a heat-conducting isolation sheet is arranged between two adjacent sealing rings.

[0010] Specifically, the elastic support member is a corrugated elastic sheet. One end of the corrugated elastic sheet is fixed on the inner wall of the sintering furnace, and the other end of the corrugated elastic sheet is connected to the outside of the sealing assembly.

[0011] Further, a plurality of heat insulation layers are arranged on the inner side of the heat insulation cover. The plurality of heat insulation layers are respectively a first heat insulation layer, a second heat insulation layer and a third heat insulation layer from outside to inside. The first heat insulation layer is made of a high-reflectivity metal material, the second heat insulation layer is made of a ceramic fiber material, and the third heat insulation layer is made of a graphite coating.

[0012] Specifically, the control mechanism includes a position sensor and a controller. The position sensor is arranged on the lifting connecting rod and is used to detect the real-time position of the heat insulation cover. The controller is electrically connected to the position sensor and the hand wheel and is used to automatically adjust the opening and closing degree of the heat insulation cover.

[0013] The present invention realizes the precise opening and closing of the heat insulation cover through the lifting connecting rod and the hand wheel. Combined with the multiple sealing rings and elastic support members in the plurality of heat insulation layers and the sealing assembly, it effectively prevents heat leakage and the intrusion of external gas, significantly improves the heat insulation effect. At the same time, the arranged control mechanism automatically controls the rotation of the hand wheel according to the feedback signal of the position sensor, thereby realizing the precise opening and closing of the heat insulation cover, reducing manual participation, improving the safety of the device, and meeting the requirements of modern industry for efficient and reliable sintering equipment. Description of the Drawings

[0014] The present invention is further described with reference to the accompanying drawings, but the content in the drawings does not constitute any limitation to the present invention.

[0015] Figure 1 is the front view of an openable heat insulation device for a vacuum high-temperature sintering furnace of the present invention.

[0016] Figure 2 is the structural schematic diagram of the heat insulation cover in an openable heat insulation device for a vacuum high-temperature sintering furnace of the present invention.

[0017] Figure 3 is the structural schematic diagram of the sealing assembly in an openable heat insulation device for a vacuum high-temperature sintering furnace of the present invention.

[0018] From Figures 1 to 3 it includes:

[0019] 1. Sintering furnace;

[0020] 2. Control mechanism;

[0021] 3. Heat preservation furnace body;

[0022] 4. Heat preservation cover;

[0023] 5. Lifting connecting rod;

[0024] 6. Handwheel;

[0025] 7. Scale mark;

[0026] 8. Sealing assembly;

[0027] 9. Elastic support;

[0028] 10. Locking mechanism;

[0029] 11. First sealing ring;

[0030] 12. Second sealing ring;

[0031] 13. Third sealing ring;

[0032] 14. Heat conduction isolation sheet;

[0033] 15. First heat insulation layer;

[0034] 16. Second heat insulation layer;

[0035] 17. Third heat insulation layer;

[0036] 18. Position sensor;

[0037] 19. Controller;

[0038] 20. Locking nut;

[0039] 21. Limit block. Specific embodiments

[0040] The present invention will be further described in conjunction with the following embodiments.

[0041] Embodiment 1:

[0042] As Figures 1-3 shown, an openable heat preservation device for a vacuum high-temperature sintering furnace includes a sintering furnace 1, a control mechanism 2 is installed outside the sintering furnace 1, a heat preservation furnace body 3 is arranged inside the sintering furnace 1, a heat preservation cover 4, a lifting connecting rod 5 and a handwheel 6 are installed on the heat preservation furnace body 3, the heat preservation cover 4 is connected to the sintering furnace 1 through the lifting connecting rod 5, one end of the lifting connecting rod 5 is fixed on the heat preservation cover 4, the other end of the lifting connecting rod 5 passes through the sintering furnace 1 and is connected to the handwheel 6, a scale mark 7 is arranged on the lifting connecting rod 5, and a sealing assembly 8 is arranged on the edge of the sintering furnace 1, and the sealing assembly 8 forms a dynamic seal with the upper opening of the sintering furnace 1.

[0043] The heat preservation cover 4 is connected to the furnace body of the sintering furnace 1 through the lifting connecting rod 5. One end of the lifting connecting rod 5 is fixed on the heat preservation cover 4, and the other end passes through the heat preservation furnace body 3 and is connected to the handwheel 6. A scale mark 7 is provided on the lifting connecting rod 5 to display the opening and closing position of the heat preservation cover 4. The operator can intuitively understand the current position of the heat preservation cover 4 by observing the scale mark 7 and adjust its opening and closing degree according to the process requirements. The handwheel 6 drives the lifting connecting rod 5 to move up and down by rotation, so as to realize the opening or closing of the heat preservation cover 4. The lifting connecting rod 5 is connected to the heat preservation furnace body 3 through a threaded structure. When the handwheel 6 rotates, the lifting connecting rod 5 moves axially along the thread, so as to accurately control the position of the heat preservation cover 4. This design not only improves the operation convenience but also ensures the stability of the heat preservation cover 4 at different positions.

[0044] A sealing component 8 is provided at the edge of the sintering furnace 1. The sealing component 8 forms a dynamic seal with the upper opening of the sintering furnace 1. The sealing component 8 is made of high-temperature resistant flexible materials, such as silicone rubber or graphite composite materials, and can maintain good sealing performance in a high-temperature environment. When the heat preservation cover 4 is lifted or lowered, the sealing component 8 can always keep in close contact with the upper opening of the sintering furnace 1 to prevent heat leakage or external gas from entering the inside of the heat preservation furnace body 3. In addition, the design of the sealing component 8 has a certain elastic deformation ability and can adapt to sintering furnaces 1 of different sizes, thus enhancing the versatility of the device. This dynamic seal design not only improves the sealing performance of the device but also extends the service life of the sealing component 8. This multi-layer seal design can effectively prevent heat leakage and external gas intrusion, thus significantly improving the sealing performance of the device. To further enhance the sealing effect, sealing washers are provided on the inner sides of the first sealing ring 11 and the third sealing ring 13. The sealing washers are in close fit with the sealing surface of the main body of the sintering furnace 1 to ensure good sealing performance even in a high-temperature environment. In addition, an elastic compensation piece is provided on the outer side of the second sealing ring 12. The elastic compensation piece abuts against the corrugated elastic piece to compensate for the deformation of the sealing ring caused by thermal expansion, thus avoiding seal failure caused by thermal stress concentration.

[0045] A heat-conducting isolation sheet 14 is provided between two adjacent sealing rings. The surface of the heat-conducting isolation sheet 14 is coated with a high-temperature resistant coating. The contact surface between the high-temperature resistant coating and the sealing ring forms a micron-level rough structure to enhance the heat insulation effect. The material selection of the high-temperature resistant coating needs to comprehensively consider its heat resistance, wear resistance and chemical stability. For example, ceramic matrix composite materials or cermet coatings can be selected. In practical applications, the thickness and roughness of the high-temperature resistant coating need to be optimized according to specific working conditions to ensure that it can work stably in a high-temperature environment for a long time.

[0046] The elastic support member 9 is a corrugated elastic sheet. One end of the corrugated elastic sheet is fixed on the inner wall of the sintering furnace 1, and the other end of the corrugated elastic sheet is connected to the outer side of the sealing assembly 8. A cooling channel is provided at the trough of the corrugated elastic sheet, which is used to reduce the temperature of the elastic support member 9, thereby extending its service life. The design of the cooling channel needs to be optimized according to the actual working conditions. For example, the cross-sectional shape of the cooling channel can be circular or rectangular to ensure that the cooling medium can flow evenly and take away heat.

[0047] Multiple insulation layers are provided on the inner side of the heat preservation cover 4. The multiple insulation layers are the first insulation layer 15, the second insulation layer 16, and the third insulation layer 17 from the outside to the inside. The first insulation layer 15 is made of a high reflectivity metal material, such as aluminum foil or stainless steel foil, which is used to reflect the heat radiated by the heating element outward and reduce the heat radiation loss. The second insulation layer 16 is made of ceramic fiber material and has excellent heat insulation performance. Its low thermal conductivity can effectively reduce heat conduction. The third insulation layer 17 is coated with graphite, which can absorb the residual heat and reduce heat conduction to avoid heat accumulation. The three insulation layers work together to significantly improve the heat preservation effect and extend the service life of the heat preservation cover 4 at the same time. The design of this multiple insulation layer not only enhances the heat preservation performance but also provides higher durability for the device.

[0048] A locking mechanism 10 is provided on the handwheel 6. The locking mechanism 10 includes a locking nut 20 and a limit block 21. The locking nut 20 is sleeved on the rotating shaft of the handwheel 6, and the limit block 21 is fixed on the sintering furnace 1. After the handwheel 6 rotates to the target position, the handwheel 6 is fixed by tightening the locking nut 20 to prevent the position of the heat preservation cover 4 from shifting due to vibration or external force. The limit block 21 is used to limit the rotation range of the handwheel 6 to avoid over-rotation and damage to the lifting link 5 or the heat preservation cover 4. The combined use of the locking mechanism 10 and the limit block 21 improves the safety and reliability of the device and ensures that the heat preservation cover 4 remains stable at a specific position.

[0049] To further improve the operation convenience and accuracy, the openable and closable heat preservation device further includes a position sensor 18 and a controller 19. The position sensor 18 is provided on the lifting link 5 and is used to detect the real-time position of the heat preservation cover 4. The controller 19 is electrically connected to the position sensor 18 and the handwheel 6 and is used to automatically adjust the opening and closing degree of the heat preservation cover 4. When the position of the heat preservation cover 4 needs to be adjusted, the controller 19 automatically controls the rotation of the handwheel 6 according to the feedback signal of the position sensor 18, so as to realize the precise opening and closing of the heat preservation cover 4.

[0050] The controller 19 also has a manual mode, which allows the operator to manually adjust the position of the heat preservation cover 4 as needed. The introduction of the position sensor 18 and the controller 19 realizes the intelligent control of the heat preservation cover 4. By real-time monitoring the position of the heat preservation cover 4 and automatically adjusting it, the convenience and accuracy of the operation are improved. The design of the manual mode provides flexibility for special process requirements, making the device more adaptable to diverse production needs.

[0051] In practical applications, the operation process of the openable heat preservation device is as follows: First, the operator determines the target position of the heat preservation cover 4 according to the process requirements, and rotates the lifting link 5 through the handwheel 6 to adjust the heat preservation cover 4 to the target position. The scale mark 7 on the lifting link 5 can help the operator accurately judge the opening and closing degree of the heat preservation cover 4. When the heat preservation cover 4 is closed, it jointly forms a heat insulation layer with the heat insulation layer around the heating body, slowing down the heat loss in the heating body and playing a heat preservation role. During the whole process, the position sensor 18 real-time monitors the position of the heat preservation cover 4 and transmits the data to the controller 19. If it is necessary to automatically adjust the position of the heat preservation cover 4, the controller 19 will automatically control the rotation of the handwheel 6 according to the feedback signal of the position sensor 18, so as to realize the precise opening and closing of the heat preservation cover 4.

[0052] In summary, the openable heat preservation device provided by the present invention realizes the precise opening and closing of the heat preservation cover 4 through the lifting link 5 and the handwheel 6. Combined with the joint action of the multi-layer heat insulation layer and the multiple sealing rings and elastic support members 9 in the sealing assembly 8, it effectively prevents heat leakage and the intrusion of external gases, significantly improving the heat preservation effect. At the same time, the set control mechanism 2 automatically controls the rotation of the handwheel 6 according to the feedback signal of the position sensor 18, so as to realize the precise opening and closing of the heat preservation cover 4, reducing manual participation and enhancing the safety of the device, meeting the requirements of modern industry for efficient and reliable sintering equipment.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An openable and closable heat preservation device for a vacuum high-temperature sintering furnace, characterized in that: The invention comprises a sintering furnace, wherein a control mechanism is installed on the outside of the sintering furnace, an insulation furnace body is arranged inside the sintering furnace, an insulation cover, a lifting connecting rod and a hand wheel are installed on the insulation furnace body, the insulation cover is connected to the sintering furnace through the lifting connecting rod, one end of the lifting connecting rod is fixed on the insulation cover, the other end of the lifting connecting rod passes through the sintering furnace and is connected to the hand wheel, a scale mark is arranged on the lifting connecting rod, a sealing assembly is arranged on the edge of the sintering furnace, and the sealing assembly forms a dynamic seal with the upper opening of the sintering furnace; The sealing assembly includes a plurality of sealing rings and elastic supporting members; the sealing ring assemblies are sequentially distributed along the circumference of the heat-insulating furnace body and are connected to the inner wall of the sintering furnace through the elastic supporting members.

2. The retractable heat preservation device for a vacuum high temperature sintering furnace according to claim 1, characterized in that: The lifting connecting rod is connected to the sintering furnace through a thread structure. When the hand wheel rotates, the lifting connecting rod is driven to move along the axial direction of the thread. A locking mechanism is arranged on the hand wheel.

3. The retractable heat preservation device for a vacuum high temperature sintering furnace according to claim 2, characterized in that: The sealing assembly includes three sealing rings, namely a first sealing ring, a second sealing ring and a third sealing ring. The first sealing ring is in direct contact with the inner wall of the sintering furnace, the third sealing ring is in contact with the sealing surface of the sintering furnace, the second sealing ring is located between the first sealing ring and the third sealing ring, and a heat-conducting isolation plate is arranged between two adjacent sealing rings.

4. The retractable heat preservation device for a vacuum high temperature sintering furnace according to claim 3, characterized in that: The elastic support member is a corrugated elastic sheet, one end of which is fixed on the inner wall of the sintering furnace, and the other end of which is connected to the outer side of the sealing assembly.

5. The retractable heat preservation device for a vacuum high temperature sintering furnace according to claim 4, characterized in that: The inner side of the thermal insulation cover is provided with multiple thermal insulation layers, which are respectively a first thermal insulation layer, a second thermal insulation layer and a third thermal insulation layer from the outside to the inside. The first thermal insulation layer adopts a high-reflectivity metal material, the second thermal insulation layer adopts a ceramic fiber material, and the third thermal insulation layer adopts a graphite coating.

6. The retractable heat preservation device for a vacuum high temperature sintering furnace according to claim 5, characterized in that: The control mechanism includes a position sensor and a controller. The position sensor is arranged on the lifting connecting rod and is used to detect the real-time position of the thermal insulation cover. The controller is electrically connected to the position sensor and the hand wheel and is used to automatically adjust the opening and closing degree of the thermal insulation cover.

7. The retractable heat preservation device for a vacuum high temperature sintering furnace according to claim 6, characterized in that: The locking mechanism comprises a locking nut and a limiting block, wherein the locking nut is sleeved on the rotating shaft of the hand wheel, and the limiting block is fixed on the top of the sintering furnace.

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