Furnace door opening and closing device and sintering furnace

Abstract

This invention discloses a furnace door opening and closing device and a sintering furnace, relating to the field of industrial furnace technology. It includes a furnace body fixing frame, a furnace door fixing frame, a lifting mechanism, a height locking mechanism, and a translation mechanism. The furnace body fixing frame is used to fix the furnace body, and the furnace door fixing frame is horizontally slidably connected to the upper part of the furnace body fixing frame. The lifting mechanism is fixed to the furnace door fixing frame, and its output component is connected to the furnace door. The lifting mechanism is used to drive the furnace door to move vertically. The height locking mechanism can lock the position of the furnace door and the furnace door fixing frame when the furnace door is raised to a first position after detaching from the furnace body. The output component of the translation mechanism is connected to the furnace door fixing frame, and the translation mechanism can drive the furnace door fixing frame to move horizontally and drive the furnace door to move horizontally until it separates from the top opening of the furnace body. Therefore, this device can reduce maintenance costs and improve the safety and stability of the sintering furnace.

Description

Technical Field

[0001] This invention relates to the field of industrial furnace technology, and in particular to a furnace door opening and closing device and a sintering furnace. Background Technology

[0002] Vertical sintering furnaces are key process equipment in powder metallurgy and metal ceramics manufacturing processes. They are widely used in the sintering and forming of various precision parts and functional ceramics. The furnace door structure, as the core opening and closing component of the furnace body, directly affects the stability of the atmosphere inside the furnace, temperature uniformity, operational safety, and the quality of the final product.

[0003] Currently, the opening and closing methods of existing vertical sintering furnace doors are relatively simple, mainly consisting of bottom opening and top opening. The drive structures adapted to these opening and closing methods mostly employ either screw-driven lifting mechanisms or large-diameter hydraulic cylinder rotation mechanisms. However, both of these drive structures and corresponding opening and closing methods have many insurmountable drawbacks in practical industrial applications, severely restricting the operational reliability, economic efficiency, and product adaptability of vertical sintering furnaces.

[0004] Among them, the furnace door opening and closing method using a screw lifting structure occupies a large amount of space around the furnace body, resulting in limited effective working space inside the furnace and making it unsuitable for the sintering requirements of large or special-sized workpieces; while the furnace door opening and closing method using a large-diameter hydraulic cylinder rotation structure has a large rotation stroke, and the hydraulic cylinder actuator is prone to damage during long-term and frequent opening and closing operations, resulting in rotation jamming, malfunction, or even failure to open and close normally; at the same time, uneven force on the furnace door during rotation can easily lead to deviation in the fit between the furnace door and the furnace body, further aggravating sealing loss and the probability of equipment failure, and failing to meet the working conditions requirements of high-precision sintering production. Summary of the Invention

[0005] The purpose of this invention is to provide a furnace door opening and closing device and a sintering furnace to solve the problems existing in the prior art, reduce maintenance costs, and improve the safety and stability of the sintering furnace.

[0006] To achieve the above objectives, the present invention provides the following solution: This invention provides a furnace door opening and closing device, including a furnace body fixing frame, a furnace door fixing frame, a lifting mechanism, a height locking mechanism, and a translation mechanism. The furnace body fixing frame is used to fix the furnace body, and the furnace door fixing frame is horizontally slidably connected to the upper part of the furnace body fixing frame. The lifting mechanism is fixed to the furnace door fixing frame, and the output component of the lifting mechanism is connected to the furnace door. The lifting mechanism is used to drive the furnace door to move in a vertical direction. The height locking mechanism can lock the position of the furnace door and the furnace door fixing frame when the furnace door is raised to a first position after detaching from the furnace body. The output component of the translation mechanism is connected to the furnace door fixing frame, and the translation mechanism can drive the furnace door fixing frame to move horizontally and drive the furnace door to move horizontally until it separates from the top opening of the furnace body.

[0007] In some embodiments, the height locking mechanism includes a first limiting part disposed on the furnace door fixing frame, and a second limiting part disposed on the end face of the furnace door. A fixing rod can be inserted into the first limiting part and the second limiting part to achieve position locking between the furnace door and the furnace door fixing frame.

[0008] In some embodiments, the height locking mechanism includes a locking pin and an elastic reset member. Under the action of the elastic reset member, the locking pin can be engaged in the locking groove of the second limiting part to achieve position locking between the furnace door and the furnace door fixing frame.

[0009] In some embodiments, a furnace door locking mechanism is also included, which can lock the furnace door at the position of the furnace body opening.

[0010] In some embodiments, the furnace door locking mechanism includes a locking ring and a driving device. The locking ring is rotatable and fits snugly against the upper edge of the furnace body opening. The driving device is mounted on the furnace door fixing frame. The output component of the driving device is connected to the locking ring to drive the locking ring to rotate bidirectionally. The inner wall surface of the locking ring is provided with a plurality of first protrusions at equal intervals in the circumferential direction. The first protrusions protrude radially outward from the inner wall of the locking ring. A groove is formed between two adjacent first protrusions. The number of grooves is the same as the number of second protrusions radially outward from the bottom edge of the furnace door. Each second protrusion can be inserted into each of the grooves. The driving device drives the locking ring to rotate, which can cause the second protrusions to rotate under the first protrusions to restrict the furnace door from moving upward relative to the locking ring.

[0011] In some embodiments, a plurality of rollers are also included, which are disposed on the outer wall of the furnace body. The rollers contact the bottom of the locking ring to support the locking ring and enable the locking ring to rotate relative to the furnace body about the axis of the top opening of the furnace body.

[0012] In some embodiments, a plurality of lifting devices are fixedly provided on the upper surface of the furnace door, and the output end of the lifting mechanism is fixedly connected to the lifting devices.

[0013] In some embodiments, a control device is also included, which is fixedly mounted on the furnace body frame. The lifting mechanism, the translation mechanism, the height locking mechanism, and the furnace door locking mechanism are all signal-connected to the control device.

[0014] In some embodiments, the driving device includes a hydraulic cylinder and a pusher bracket. One end of the hydraulic cylinder is hinged to the furnace body fixing frame, and the other end is hinged to the pusher bracket. The pusher bracket is fixed to the outer side wall of the locking ring. The hydraulic cylinder drives the locking ring to rotate bidirectionally by pushing the pusher bracket.

[0015] The present invention also provides a sintering furnace, including a furnace door, a furnace body, and a furnace door opening and closing device as described in any one of the above.

[0016] The present invention achieves the following technical effects compared to the prior art: This invention incorporates a height locking mechanism into the device. When the furnace door detaches from the furnace body and rises to the first position under the drive of the lifting mechanism, the height locking mechanism instantly locks the relative position of the furnace door and the furnace door fixing frame. This effectively prevents the furnace door from accidentally falling or shaking during horizontal translation, significantly improving the safety of the furnace door opening and closing operation. It also ensures the smoothness of the furnace door's translational movement, avoiding positioning deviations caused by door shaking. Furthermore, the lifting mechanism and translational mechanism of this device are used to realize the vertical lifting and horizontal movement of the furnace door, respectively. This clear division of labor not only improves the coordination of lifting and translational movements but also reduces the overall failure rate of the device, simplifies subsequent inspection and maintenance procedures, and lowers maintenance costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the furnace door opening and closing device in one embodiment of Example 1; Figure 2 This is a side view of the furnace door opening and closing device in one embodiment of Example 1; Figure 3 This is a schematic diagram of the furnace door locking state in one embodiment of Example 1; Figure 4 This is a structural schematic diagram of the furnace door unlocked state in one embodiment of Example 1; Figure 5 This is a schematic diagram of the height locking mechanism in one embodiment of Example 1.

[0019] Wherein: 1-furnace body fixing frame; 2-furnace door locking mechanism; 3-furnace door fixing frame; 4-lifting mechanism; 5-height locking mechanism; 6-second limiting part; 7-translation mechanism; 8-fixing rod; 9-oil cylinder; 10-pushing bracket; 11-first protrusion; 12-second protrusion; 13-locking ring; 14-roller; 15-furnace body; 16-locking pin; 17-elastic reset component. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1 This invention provides a furnace door opening and closing device, such as... Figure 1-5As shown, the device includes a furnace body fixing frame 1, a furnace door fixing frame 3, a lifting mechanism 4, a height locking mechanism 5, and a translation mechanism 7. The furnace body fixing frame 1 is used to fix the furnace body, and the furnace door fixing frame 3 is horizontally slidably connected to the upper part of the furnace body fixing frame 1. The lifting mechanism 4 is fixed to the furnace door fixing frame 3, and the output component of the lifting mechanism 4 is connected to the furnace door. The lifting mechanism 4 is used to drive the furnace door to move vertically. The height locking mechanism 5 can lock the position of the furnace door and the furnace door fixing frame 3 when the furnace door is lifted to the first position after separating from the furnace body 15. The output component of the translation mechanism 7 is connected to the furnace door fixing frame 3, and the translation mechanism 7 can drive the furnace door fixing frame 3 to move horizontally and drive the furnace door to move horizontally until it separates from the top opening of the furnace body. This embodiment adds a height locking mechanism 5 to the device. The height locking mechanism 5, when the furnace door is driven by the lifting mechanism 4 to detach from the furnace body and rise to the first position, can immediately lock the relative position of the furnace door and the furnace door fixing frame 3, effectively preventing the furnace door from accidentally falling or shaking during horizontal translation, significantly improving the safety of the furnace door opening and closing operation, while ensuring the smoothness of the furnace door translation operation and avoiding positioning deviation caused by furnace door shaking; at the same time, the lifting mechanism 4 and the translation mechanism 7 of this device are used to realize the vertical lifting action and horizontal movement of the furnace door, respectively, with clear division of labor, which not only improves the coordination of lifting and translation operations, but also reduces the overall failure rate of the device, while simplifying the later inspection and maintenance process and reducing maintenance costs.

[0023] In some embodiments of this example, the height locking mechanism 5 includes a first limiting part, which is disposed on the furnace door fixing frame 3. A second limiting part 6 is disposed on the end face of the furnace door. The fixing rod 8 can be inserted into the first limiting part and the second limiting part 6 to achieve position locking between the furnace door and the furnace door fixing frame 3. By adopting the plug-in locking structure of the first limiting part and the second limiting part 6 in conjunction with the fixing rod 8, the locking and unlocking of the furnace door can be completed simply by inserting and pulling the fixing rod 8. There is no need for complex transmission components. The action is intuitive and the response is fast, which can significantly improve the overall operation efficiency of opening and closing the furnace door. At the same time, when the furnace door rises to the designated position, the relative positioning and locking of the furnace door and the furnace door fixing frame can be quickly achieved. The locking accuracy is high, which effectively avoids the furnace door from shaking, shifting or accidentally falling during the translation process.

[0024] In some embodiments of this example, the height locking mechanism 5 includes a locking pin 16 and an elastic reset member 17. Under the action of the elastic reset member 17, the locking pin 16 can be engaged in the locking groove of the second limiting part 6 to achieve position locking between the furnace door and the furnace door fixing frame 3. Under the elastic force of the elastic reset member 17, when the furnace door rises to the preset first position, the locking pin can be automatically engaged in the locking groove of the second limiting part 6 under the drive of the elastic reset member. The furnace door position can be automatically locked without the operator manually inserting or removing the fixing rod 8 or performing additional operations. This not only simplifies the operation steps and improves the overall efficiency of opening and closing the furnace door, but also avoids safety hazards caused by the operator missing the locking steps, further improving operational safety.

[0025] In some embodiments of this example, the furnace door opening and closing device further includes a furnace door locking mechanism 2, which can lock the furnace door at the furnace body opening position. When the furnace door is closed to the furnace body opening position, the furnace door locking mechanism 2 can firmly lock the furnace door to prevent the furnace door from loosening, shifting or accidentally opening during the operation of the industrial furnace, ensuring the sealing performance between the furnace door and the furnace body opening, preventing the leakage of high-temperature flue gas and heat in the furnace, and ensuring the stability of the internal temperature, pressure and other operating conditions of the furnace. This not only improves the production efficiency and product quality of the industrial furnace, but also avoids equipment failure caused by furnace door loosening.

[0026] In some embodiments of this example, the furnace door locking mechanism 2 includes a locking ring 13 and a driving device. The locking ring 13 is rotatable and fits snugly against the upper edge of the furnace body opening. The driving device is mounted on the furnace door fixing frame 3. The output component of the driving device is connected to the locking ring 13 to drive the locking ring 13 to rotate bidirectionally. The inner wall surface of the locking ring 13 is provided with a plurality of first protrusions 11 at equal intervals in the circumferential direction. The first protrusions 11 protrude radially outward from the inner wall of the locking ring 13, and a groove is formed between two adjacent first protrusions 11. The number of grooves is the same as the number of second protrusions 12 protruding radially outward from the bottom edge of the furnace door. Each of the second protrusions 12 can be inserted into the corresponding groove, and the driving device drives the locking ring 13 to rotate, so that the second protrusion 12 can rotate under the first protrusion 11 to restrict the furnace door from moving upward relative to the locking ring 13; the locking ring 13 is set to fit against the upper edge of the furnace body opening, and the first protrusion 11, the groove and the second protrusion 12 at the bottom of the furnace door are designed to correspond to each other with equal circumferential spacing. After the furnace door is closed, each of the second protrusions 12 is precisely inserted into the corresponding groove. After the driving device drives the locking ring 13 to rotate, the first protrusion 11 just covers the bottom of the second protrusion 12, forming a mechanically limited position that is evenly distributed in the circumferential direction. This structure ensures that the locking force between the locking ring 13 and the furnace door is evenly distributed circumferentially, eliminating localized stress concentration. This effectively prevents deformation and loosening of the furnace door due to uneven stress, while reliably restricting upward movement of the furnace door. Even under conditions of pressure fluctuations within the furnace chamber and severe equipment vibration, it maintains a stable fit between the furnace door and the furnace opening, ensuring locking reliability. Furthermore, the drive device directly rotates the locking ring 13 bidirectionally to complete the locking and unlocking actions, resulting in a high degree of automation. No manual insertion, removal, or tightening by operators is required, significantly simplifying the operation and shortening the locking time after the furnace door closes and the unlocking time before opening, making it suitable for industrial production scenarios involving frequent furnace door opening and closing. Simultaneously, the rotation of the locking ring 13 is smooth, with rapid drive response, and seamlessly integrates with the existing lifting and translation mechanisms of the device, without affecting the overall efficiency of the furnace door opening and closing process.

[0027] In some embodiments of this example, the furnace door opening and closing device further includes several rollers 14. The rollers 14 are disposed on the outer wall of the furnace body. The rollers 14 contact the bottom of the locking ring 13 to support the locking ring 13 and enable the locking ring 13 to rotate relative to the furnace body around the axis of the top opening of the furnace body. The rollers 14 are disposed close to the bottom of the locking ring 13 and provide upward support force. The weight of the locking ring 13 and the pressure transmitted by the furnace door can be evenly distributed to the several rollers 14 and then transmitted to the outer wall of the furnace body through the rollers 14. This prevents the locking ring 13 from deforming or sinking due to long-term vertical load. It also prevents the contact surface between the locking ring 13 and the upper edge of the furnace body opening from wearing due to excessive local stress. This effectively protects the structural integrity of the locking ring 13 and the furnace body and extends their service life.

[0028] In some embodiments of this example, several lifting devices are fixedly provided on the upper surface of the furnace door, and the output end of the lifting mechanism 4 is fixedly connected to the lifting devices. The lifting devices are set on the upper surface of the furnace door. When the lifting mechanism 4 drives the furnace door to rise and fall in the vertical direction through the lifting devices, the rising and falling trajectory of the furnace door can be more accurate and stable, effectively avoiding scratches and interference between the side of the furnace door and the furnace door fixing frame 3, the furnace body and other components.

[0029] In some embodiments of this example, the furnace door opening and closing device also includes a control device, which is fixedly mounted on the furnace body mounting frame 1. The lifting mechanism 4, the translation mechanism 7, the height locking mechanism 5, and the furnace door locking mechanism 2 are all signal-connected to the control device. The control device can precisely control the lifting height of the lifting mechanism 4, the translation distance of the translation mechanism 7, the locking / unlocking timing of the height locking mechanism 5, and the movement amplitude of the furnace door locking mechanism 2, ensuring that the actions of each mechanism are accurate and in place, and avoiding positioning deviations. At the same time, the operating status of each mechanism is monitored in real time through signal feedback, and action deviations are corrected in a timely manner to prevent mechanism jamming or misalignment, further improving the overall stability of the device operation and the accuracy of action repeatability positioning.

[0030] In some embodiments of this example, the driving device includes a hydraulic cylinder 9 and a pusher bracket 10. One end of the hydraulic cylinder 9 is hinged to the furnace body fixing frame 1, and the other end is hinged to the pusher bracket 10. The pusher bracket 10 is fixed to the outer wall of the locking ring 13. The hydraulic cylinder 9 drives the locking ring 13 to rotate bidirectionally by pushing the pusher bracket 10. The hydraulic cylinder 9 can extend and retract to drive the pusher bracket 10 to move bidirectionally, thereby driving the locking ring 13 to rotate bidirectionally, precisely corresponding to the two actions of locking and unlocking the furnace door. When the hydraulic cylinder extends, it pushes the pusher bracket 10 to rotate the locking ring 13 in the forward direction, so that the first protrusion 11 covers the second protrusion 12, completing the furnace door locking. Figure 3 As shown in state A; when the hydraulic cylinder retracts, it pulls and pushes the bracket 10, causing the locking ring 13 to rotate in the opposite direction, separating the first protrusion 11 from the second protrusion 12, thus unlocking the furnace door. Figure 4 As shown in state B. The action response is rapid and the reversal is convenient. Moreover, the rotation angle and speed of the locking ring 13 can be precisely controlled by adjusting the extension and retraction speed of the hydraulic cylinder, ensuring that the locking and unlocking actions are precise and controllable, and adapting to the process requirements of opening and closing the furnace door.

[0031] Example 2 This embodiment also provides a sintering furnace, including a furnace door, a furnace body 15, and a furnace door opening and closing device as described in Embodiment 1. This embodiment adds a height locking mechanism 5 to the device. When the furnace door is driven by the lifting mechanism 4 to detach from the furnace body and rise to the first position, the height locking mechanism 5 can immediately lock the relative position of the furnace door and the furnace door fixing frame 3. This effectively prevents the furnace door from accidentally falling or shaking during horizontal translation, significantly improving the safety of the furnace door opening and closing operation. It also ensures the stability of the furnace door's translational movement, avoiding positioning deviations caused by furnace door shaking. Furthermore, the lifting mechanism 4 and the translation mechanism 7 of this device are used to realize the vertical lifting and lowering of the furnace door and the horizontal movement of the furnace door, respectively. This clear division of labor not only improves the coordination of lifting and translational movements but also reduces the overall failure rate of the device, simplifies subsequent inspection and maintenance procedures, and reduces maintenance costs.

[0032] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A furnace door opening and closing device, characterized in that: It includes a furnace body fixing frame, a furnace door fixing frame, a lifting mechanism, a height locking mechanism, and a translation mechanism. The furnace body fixing frame is used to fix the furnace body, and the furnace door fixing frame is horizontally slidably connected to the upper part of the furnace body fixing frame. The lifting mechanism is fixed to the furnace door fixing frame, the output component of the lifting mechanism is connected to the furnace door, and the lifting mechanism is used to drive the furnace door to move in the vertical direction; The height locking mechanism can lock the position of the furnace door and the furnace door fixing frame when the furnace door is raised to the first position after being separated from the furnace body; The output component of the translation mechanism is connected to the furnace door fixing frame, and the translation mechanism can drive the furnace door fixing frame to move horizontally and drive the furnace door to move horizontally to separate from the top opening of the furnace body.

2. The furnace door opening and closing device according to claim 1, characterized in that: The height locking mechanism includes a first limiting part, which is disposed on the furnace door fixing frame. A second limiting part is disposed on the end face of the furnace door. A fixing rod can be inserted into the first limiting part and the second limiting part to achieve position locking between the furnace door and the furnace door fixing frame.

3. The furnace door opening and closing device according to claim 2, characterized in that: The height locking mechanism includes a locking pin and an elastic reset member. Under the action of the elastic reset member, the locking pin can be engaged in the locking groove of the second limiting part to achieve position locking between the furnace door and the furnace door fixing frame.

4. The furnace door opening and closing device according to claim 1, characterized in that: It also includes a furnace door locking mechanism, which can lock the furnace door at the position of the furnace body opening.

5. The furnace door opening and closing device according to claim 4, characterized in that: The furnace door locking mechanism includes a locking ring and a driving device. The locking ring is rotatable and fits snugly against the upper edge of the furnace body opening. The driving device is mounted on the furnace door fixing frame. The output component of the driving device is connected to the locking ring to drive the locking ring to rotate bidirectionally. The inner wall surface of the locking ring is provided with a plurality of first protrusions at equal intervals in the circumferential direction. The first protrusions protrude radially outward from the inner wall of the locking ring. A groove is formed between two adjacent first protrusions. The number of grooves is the same as the number of second protrusions radially outward from the bottom edge of the furnace door. Each second protrusion can be inserted into each of the grooves. The driving device drives the locking ring to rotate, which can cause the second protrusions to rotate under the first protrusions to restrict the furnace door from moving upward relative to the locking ring.

6. The furnace door opening and closing device according to claim 5, characterized in that: It also includes several rollers, which are disposed on the outer wall of the furnace body. The rollers contact the bottom of the locking ring to support the locking ring and enable the locking ring to rotate relative to the furnace body about the axis of the top opening of the furnace body.

7. The furnace door opening and closing device according to claim 1, characterized in that: Several lifting devices are fixedly installed on the upper surface of the furnace door, and the output end of the lifting mechanism is fixedly connected to the lifting devices.

8. The furnace door opening and closing device according to claim 1, characterized in that: It also includes a control device, which is fixedly mounted on the furnace body frame. The lifting mechanism, the translation mechanism, the height locking mechanism, and the furnace door locking mechanism are all signal-connected to the control device.

9. The furnace door opening and closing device according to claim 6, characterized in that: The driving device includes a hydraulic cylinder and a pushing bracket. One end of the hydraulic cylinder is hinged to the furnace body fixing frame, and the other end is hinged to the pushing bracket. The pushing bracket is fixed to the outer side wall of the locking ring. The hydraulic cylinder drives the locking ring to rotate in both directions by pushing the pushing bracket.

10. A sintering furnace, characterized in that: It includes a furnace door, a furnace body, and a furnace door opening and closing device as described in any one of claims 1-9.

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