Anti-deformation reinforcing device for ring furnace inner cover

Abstract

The utility model relates to industrial furnace heat treatment equipment technical field discloses a kind of annular furnace inner cover anti-deformation reinforcing device, including bottom plate one and the fixed plate one of top of bottom plate one is attached, bottom plate one is connected by bolt one thread with fixed plate one, and fixed plate one top is fixedly connected with reinforcing rib and cooling cavity, cooling cavity outer wall is fixedly connected with heat conduction fixed plate, fixedly connected with support column between adjacent heat conduction fixed plate, and support column bottom is fixedly connected with fixed plate one.The utility model provides rigid support by internal heat insulation fixed plate cooperation support column, effectively prevent inner cover collapse deformation under high temperature environment, indirectly water-cooling heat dissipation is carried out using external heat conduction fixed plate cooperation cooling cavity simultaneously, avoid direct cooling to lead to thermal stress damage, significantly prolong the service life of equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of industrial furnace heat treatment equipment, and in particular to a deformation-resistant reinforcement device for the inner shroud of an annular furnace. Background Technology

[0002] As a highly efficient continuous heating device, the ring furnace is widely used in industries such as metallurgy, casting, and machining for heat treatment of various metal workpieces. In the structure of the ring furnace, the inner cover is one of the core components, which mainly serves to isolate the heating elements, protect the workpieces, and maintain a specific atmosphere inside the furnace. It needs to withstand extremely high temperatures for a long time during operation.

[0003] However, under such continuous high-temperature operating conditions, the metal material of the inner cover will inevitably undergo physical property degradation and high-temperature softening. As the service time increases, under the combined action of its own weight and the thermal stress generated by alternating hot and cold temperatures, the inner cover will collapse, shrink, or twist and deform inward. Once this deformation occurs, it will not only compress the space for the internal workpiece and affect production efficiency, but in severe cases, it will also cause the inner cover structure to crack, leading to furnace gas leakage, thereby destroying the stability of the heat treatment process.

[0004] To alleviate the problem of high-temperature deformation of the inner cover, the existing conventional approach is to try to cool it down or provide simple internal support. However, if direct water spray cooling is used, the surface of the inner cover, which is red-hot, will generate a huge thermal shock due to rapid cooling, resulting in great thermal stress inside the material, which in turn can cause chilling cracks or even brittle fracture, thus accelerating the damage to the equipment. If only a simple internal frame support is used, the support structure itself will also lose strength due to rapid heat transfer and eventually deform and fail along with the inner cover. Currently, there is a lack of a comprehensive protective device on the market that can provide stable physical shaping support and can dissipate heat and cool down in a safe and gentle way.

[0005] Therefore, this utility model proposes a deformation-resistant reinforcement device for the inner shroud of an annular furnace to address the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems in the prior art, the inner shroud of the annular furnace will soften and collapse inward under long-term high-temperature operation, and conventional cooling methods such as direct spraying will cause cracks or fractures on the surface of high-temperature workpieces due to severe thermal stress, resulting in shortened equipment service life and high maintenance costs. The present invention aims to provide an annular furnace inner shroud anti-deformation reinforcement device with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a deformation-resistant reinforcement device for the inner hood of an annular furnace, comprising: a base plate, a fixing plate attached to the top of the base plate, the base plate and the fixing plate being connected by bolts; a reinforcing rib and a cooling cavity are fixedly connected to the top of the fixing plate, the outer wall of the reinforcing rib being fixedly connected to the cooling cavity; and a heat-conducting fixing plate, a support column, a protective cover and a heat-insulating fixing plate.

[0008] The cooling chamber is fixedly connected to the heat-conducting fixing plate on its outer wall, and the supporting column is fixedly connected between adjacent heat-conducting fixing plates. The bottom outer wall of the supporting column is fixedly connected to the bolt and the bottom is fixedly connected to the fixing plate. The protective cover is attached to the outer wall of the heat-conducting fixing plate, the heat-insulating fixing plate is attached to the inner wall of the protective cover, and the supporting column is fixedly connected between adjacent heat-insulating fixing plates.

[0009] Furthermore, the bottom outer wall of the support column is fixedly connected to the bolt and the bottom is fixedly connected to the fixing plate, thereby forming a stable clamping support structure through the cooperation of the heat insulation fixing plate and the heat conduction fixing plate with the support column.

[0010] Preferably, a water inlet is fixedly connected to the outside of the cooling cavity. The water inlet penetrates the outer wall of the cooling cavity and communicates with the inside of the cooling cavity, for delivering cooling medium into the cooling cavity.

[0011] Preferably, a vent hole is fixedly connected to the top of the cooling chamber, the vent hole penetrates the top of the cooling chamber and communicates with the interior of the cooling chamber, and is used to balance the air pressure inside and outside the cooling chamber and discharge steam.

[0012] Preferably, the top of the base plate is provided with a threaded hole, and the bottom of the fixing plate is provided with a threaded hole corresponding to the base plate. The outer wall of the bolt is threadedly connected to the threaded holes of the base plate and the fixing plate to achieve the fastening of the base part.

[0013] Preferably, the reinforcing ribs are in the form of right-angled triangular plates, and multiple reinforcing ribs are evenly distributed around the outer wall of the cooling cavity to enhance the stability of the connection between the cooling cavity and the fixing plate.

[0014] Preferably, the heat-conducting fixing plate has an arc-shaped plate structure, and multiple heat-conducting fixing plates are distributed circumferentially along the outer wall of the cooling cavity to ensure that the outer wall of the protective cover can be fully covered and uniform heat conduction can be achieved.

[0015] Preferably, the heat insulation fixing plate has an arc-shaped plate structure, and multiple heat insulation fixing plates are distributed circumferentially along the inner wall of the protective cover to form a ring support structure, so as to provide shaping support for the protective cover from the inside.

[0016] Preferably, the support column has a cylindrical structure and is made of metal to provide sufficient vertical load-bearing capacity.

[0017] Preferably, the cooling chamber is an annular hollow shell structure, and the interior of the cooling chamber contains cooling water to serve as a heat exchange medium for absorbing heat.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model solves the problem of the inner cover of the ring furnace collapsing and deforming inward due to material softening under high temperature environment by setting a rigid cage frame composed of heat insulation fixing plate and support column on the inner side of the protective cover. It achieves the effect of providing strong radial support from the inside, forcibly maintaining the ring geometry of the inner cover, effectively preventing plastic deformation and ensuring the processing accuracy of the product.

[0020] 2. This utility model solves the problem that traditional direct water cooling or spray cooling can easily cause severe thermal stress on the surface of high-temperature workpieces, leading to chilling cracks, by using a heat-conducting fixing plate to adhere to the outer wall of the protective cover and transfer heat to the water in the cooling chamber through indirect cooling. It achieves the effect of effectively protecting the material structure of the workpiece from damage while realizing efficient heat dissipation and cooling, and significantly extending the service life of the inner cover of the ring furnace.

[0021] 3. This utility model solves the problem that high-temperature heat is transferred to the internal support frame through the contact surface, causing the support components to lose strength due to overheating. It effectively blocks the heat flow to the internal support column, ensuring that the support structure maintains excellent mechanical strength and load-bearing stability under long-term high-temperature operation. Attached Figure Description

[0022] Figure 1 This is a perspective view of a deformation-resistant reinforcement device for the inner shroud of an annular furnace proposed in this utility model.

[0023] Figure 2 This is a front view of a deformation-resistant reinforcement device for the inner shroud of an annular furnace proposed in this utility model;

[0024] Figure 3 This is a right view of a deformation-resistant reinforcement device for the inner shroud of an annular furnace proposed in this utility model.

[0025] Figure 4 This is a cross-sectional view of the cooling chamber in an anti-deformation reinforcement device for an annular furnace shroud proposed in this utility model.

[0026] Legend:

[0027] 1. Base plate; 2. Fixing plate; 3. Bolts; 4. Reinforcing ribs; 5. Cooling chamber; 6. Water inlet; 7. Vent; 8. Protective cover; 9. Heat insulation fixing plate; 10. Heat conduction fixing plate; 11. Support column. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] Example:

[0030] Please refer to Figures 1 to 4 This utility model provides a deformation-resistant reinforcement device for the inner shroud of an annular furnace, which aims to solve the problem in the prior art that the inner shroud of an annular furnace softens and deforms under high-temperature environments, making safe and effective cooling difficult. Figure 1 and Figure 2As shown, a deformation-resistant reinforcement device for annular furnace inner shroud includes a base plate 1 and a fixing plate 2 attached to the top of the base plate 1. The base plate 1 serves as the bottom mounting foundation for the entire device, while the fixing plate 2 supports the upper structure and provides connection points. The top of the base plate 1 has multiple threaded holes, and the bottom of the fixing plate 2 has threaded holes corresponding to those on the base plate 1. Bolts 3 are threaded to the threaded holes on the base plate 1 and fixing plate 2 to secure them. A cooling chamber 5 is fixedly connected to the top of the fixing plate 2, and multiple reinforcing ribs 4 are also fixedly connected thereto. The reinforcing ribs 4 are right-angled triangular plate structures, vertically fixed to the top of the fixing plate 2, and their outer walls are fixedly connected to the outer wall of the cooling chamber 5. The reinforcing ribs 4 enhance the structural strength of the connection between the cooling chamber 5 and the fixing plate 2. The cooling chamber 5 is an annular hollow shell structure containing cooling water, and multiple heat-conducting fixing plates are fixedly connected to the outer wall of the cooling chamber 5. 10. The heat-conducting fixing plate 10 has an arc-shaped plate structure. Multiple heat-conducting fixing plates 10 are distributed circumferentially along the outer wall of the cooling cavity 5. Multiple support columns 11 are fixedly connected between adjacent heat-conducting fixing plates 10. The bottom outer wall of the support column 11 is fixedly connected to bolt 3 and the bottom of the support column 11 is fixedly connected to fixing plate 2. The support column 11 is used to connect and support each plate assembly. A protective cover 8 is attached to the outer wall of the heat-conducting fixing plate 10. The protective cover 8 is the workpiece to be reinforced in the annular furnace inner cover. Multiple heat-insulating fixing plates 9 are attached to the inner wall of the protective cover 8. The heat-insulating fixing plates 9 have an arc-shaped plate structure. Multiple heat-insulating fixing plates 9 are distributed circumferentially along the inner wall of the protective cover 8 and form an annular support structure. Multiple support columns 11 are fixedly connected between adjacent heat-insulating fixing plates 9. The bottom outer wall of the support column 11 is fixedly connected to bolt 3 and the bottom of the support column 11 is fixedly connected to fixing plate 2. The heat-insulating fixing plates 9 are used to physically support the protective cover 8 from the inside to prevent collapse and deformation.

[0031] To address the technical problems of uneven heat dissipation and structural damage caused by direct water cooling in the inner shroud of the annular furnace under high-temperature operating conditions, this embodiment adds a fluid interaction component to the structure of the cooling chamber 5 as part of the annular furnace inner shroud anti-deformation reinforcement device. Please refer to the following for details. Figure 4A water inlet 6 is fixedly connected to one side of the cooling chamber 5. The water inlet 6 is tubular and extends horizontally, penetrating the solid outer wall of the cooling chamber 5 and extending directly into the internal cavity. The inner diameter of the water inlet 6 is adapted to the external water supply pipeline. The water inlet 6 is used to introduce external low-temperature cooling water into the cooling chamber 5. A vent 7 is fixedly connected vertically upward at the top of the cooling chamber 5. The vent 7 is tubular and penetrates the top wall of the cooling chamber 5, communicating with the internal cavity. The vent 7 serves as a gas exchange channel to balance the internal and external air pressure of the cooling chamber 5. When the cooling water inside the cooling chamber 5 is heated and evaporates to produce water vapor, the vent 7 can promptly discharge the water vapor to prevent excessive pressure inside the cooling chamber 5. During heat transfer, the outer wall of the protective cover 8 is tightly fitted to the inner arc surface of the heat-conducting fixing plate 10. The high-temperature heat of the protective cover 8 is transferred to the heat-conducting fixing plate 10 through the contact surface. The heat-conducting fixing plate 10 is fixedly connected to the outer wall of the cooling cavity 5. The heat-conducting fixing plate 10 quickly conducts the absorbed heat to the outer wall of the cooling cavity 5. The cooling water in the cooling cavity 5 dissipates the heat from the wall of the cooling cavity 5 through convection heat exchange. This indirect cooling method of multi-layer medium conduction avoids direct spraying of cooling water onto the surface of the protective cover 8, effectively preventing thermal stress cracks caused by excessive local temperature difference in the protective cover 8. At the same time, the heat-insulating fixing plate 9 located inside the protective cover 8 forms a stable rigid cage frame with the base plate 1 and fixing plate 2 through the support column 11. The outer arc surface of the heat-insulating fixing plate 9 tightly abuts against the inner wall of the protective cover 8. When the material of the protective cover 8 softens due to heat and tends to collapse inward, the heat-insulating fixing plate 9 provides a reverse support force to maintain the annular geometry of the protective cover 8. The heat-insulating material properties of the heat-insulating fixing plate 9 block the large amount of heat transfer to the internal support column 11, ensuring that the support column 11 will not reduce its mechanical strength due to overheating.

[0032] Based on the above embodiments, in order to further improve the stability and ease of assembly and disassembly of the device, the top surface of the base plate 1 is precision machined with multiple internal threaded holes, and the bottom surface of the fixing plate 2 is provided with through holes at positions corresponding to the base plate 1. The bolt 3 passes through the through holes of the fixing plate 2 and is screwed into the threaded holes of the base plate 1. The bolt head presses the upper surface of the fixing plate 2 to lock the base plate 1 and the fixing plate 2 into one unit. The reinforcing rib 4 is preferably a right-angled triangular plate structure cut from a steel plate of uniform thickness. The horizontal right-angled side of the reinforcing rib 4 is fixedly connected to the top plane of the fixing plate 2 by welding, and the vertical right-angled side of the reinforcing rib 4 is fixedly connected to the outer cylindrical surface of the cooling cavity 5 by welding. Multiple reinforcing ribs 4 are evenly distributed in a ring array around the central axis of the cooling cavity 5. The triangular reinforcing ribs 4 can effectively disperse the lateral shear force on the cooling cavity 5. The heat-conducting fixing plate 10 is processed into a concave arc-shaped plate structure, and the curvature of the inner arc surface of the heat-conducting fixing plate 10 is half. The diameter of the heat-conducting fixing plate 10 is strictly matched with the outer radius of the protective cover 8. Multiple heat-conducting fixing plates 10 are closely arranged along the circumference of the outer wall of the cooling cavity 5 to ensure that the heat-conducting fixing plates 10 can fully cover the hot area of ​​the outer wall of the protective cover 8. The heat-insulating fixing plate 9 is processed into an outwardly convex arc-shaped plate structure. The curvature radius of the outer arc surface of the heat-insulating fixing plate 9 is strictly matched with the inner radius of the protective cover 8. Multiple heat-insulating fixing plates 9 are spliced ​​together along the circumference of the inner wall of the protective cover 8 to form a complete rigid inner ring. The support column 11 is a solid cylinder made of high-temperature alloy steel. The support column 11 stands vertically on the fixing plate 12 and is inserted between adjacent heat-conducting fixing plates 10 and adjacent heat-insulating fixing plates 9. The support column 11 is connected to each layer of plate by bolts or welding to form a stable node connection. The cooling cavity 5 is the core component of heat exchange. The overall structure of the cooling cavity 5 is a double-walled annular hollow metal shell. The annular cavity volume formed inside the cooling cavity 5 is sufficient to hold a sufficient amount of cooling water. The flowing cooling water continuously removes the heat transferred by the heat-conducting fixing plate 10.

[0033] Working Principle: Before using this annular furnace inner shroud anti-deformation reinforcement device for formal operation, the device assembly and workpiece positioning must first be completed. The operator places the base plate 1 stably on the predetermined work platform, aligns and stacks the fixing plate 2 on top of the base plate 1, and screws the rotating bolts 3 through the holes at the bottom of the fixing plate 2 and into the threaded holes at the top of the base plate 1, thereby tightly locking and fixing the base part. To further enhance the overall rigidity of the structure, a right-angled triangular reinforcing rib 4 is welded to the top of the fixing plate 2. The reinforcing rib 4 firmly connects the fixing plate 2 to the outer wall of the cooling chamber 5, ensuring cooling under high temperature and heavy load environments. The cooling chamber 5 will not tilt or shift. Then, the workpiece to be processed, i.e., the protective cover 8, is placed on the installation position of the device. At this time, the protective cover 8 is located in the annular gap formed between the heat-conducting fixing plate 10 and the heat-insulating fixing plate 9. The position of the protective cover 8 is adjusted so that the inner wall is tightly attached to the outer arc surface of the heat-insulating fixing plate 9 and the outer wall is tightly attached to the inner arc surface of the heat-conducting fixing plate 10. The initial positioning of the protective cover 8 is completed through this sandwich-type clamping structure. After confirming that the installation is correct, an appropriate amount of cooling water is injected into the cavity inside the cooling chamber 5 through the water inlet 6 connected to the outside of the cooling chamber 5 until the predetermined liquid level is reached. At this time, the device is in standby state.

[0034] When the ring furnace starts heating, the protective cover 8 is exposed to strong heat radiation in a high-temperature environment. The temperature of the metal material of the protective cover 8 gradually increases and its physical properties deteriorate or soften. During this process, the heat insulation fixing plate 9 located in the inner layer plays a key role in shaping and supporting. The heat insulation fixing plate 9 is a rigid ring surface made of multiple arc plates spliced ​​together, which tightly abuts against the inner wall of the protective cover 8. When the protective cover 8 tends to collapse inward due to its own weight or thermal stress, the heat insulation fixing plate 9 can provide a reverse radial support force, thereby forcibly maintaining the ring geometry of the protective cover 8 and preventing plastic deformation. At the same time, the heat insulation fixing plate 9 transmits the radial pressure it receives to the support column 11 connected to it. The support column 11, as a vertical frame, further transmits the load to the fixing plate 2 and the bottom plate 1 at the bottom, thereby ensuring the mechanical stability of the entire support system. In addition, the heat insulation performance of the heat insulation fixing plate 9 effectively blocks the rapid radiation and transfer of high-temperature heat to the internal support column 11, preventing the support column 11 from weakening due to overheating and ensuring the structural reliability under long-term high-temperature operation.

[0035] Simultaneously, the device's heat dissipation and cooling system works to protect the workpiece material. The high-temperature heat accumulated on the outer wall of the protective cover 8 is rapidly transferred to the tightly fitted heat-conducting fixing plate 10 through heat conduction. The heat-conducting fixing plate 10 not only acts as a heat transfer bridge but also increases the contact area with the cooling cavity 5 and the protective cover 8 through its curved surface, maximizing heat transfer efficiency. The heat-conducting fixing plate 10 utilizes its excellent thermal conductivity to conduct heat radially outward and transfer it to the metal outer wall of the cooling cavity 5. The cooling water contained inside the cooling cavity 5 acts as a heat-absorbing medium, continuously absorbing the heat transferred from the wall of the cooling cavity 5. The cooling water temperature rises and local boiling occurs, utilizing the high specific heat capacity and high latent heat of vaporization of water to efficiently... The heat is carried away, thereby cooling the protective cover 8. This indirect cooling method, achieved through the heat-conducting fixing plate 10, avoids direct contact between the low-temperature cooling water and the high-temperature surface of the protective cover 8. This effectively prevents the protective cover 8 from developing thermal stress cracks or structural damage due to rapid temperature differences, and extends the service life of the protective cover 8. During the cooling process, if water vapor is generated in the cooling chamber 5, causing the air pressure to rise, the excess gas and water vapor will automatically be discharged outward through the vent 7 located at the top of the cooling chamber 5. The vent 7 keeps the air pressure inside and outside the cooling chamber 5 balanced at all times, preventing the cooling chamber 5 from deforming or bursting due to excessive internal pressure. The water inlet 6 can continuously replenish cold water as needed, forming a continuous heat exchange cycle.

Claims

1. A deformation-resistant reinforcement device for an inner shroud of an annular furnace, comprising a base plate (1) and a fixing plate (2) attached to the top of the base plate (1), wherein the base plate (1) and the fixing plate (2) are threadedly connected by bolts (3); the top of the fixing plate (2) is fixedly connected with a reinforcing rib (4) and a cooling cavity (5), wherein the outer wall of the reinforcing rib (4) is fixedly connected to the cooling cavity (5); Its features are, A heat-conducting fixing plate (10) is fixedly connected to the outer wall of the cooling cavity (5). A support column (11) is fixedly connected between adjacent heat-conducting fixing plates (10). The bottom outer wall of the support column (11) is fixedly connected to the bolt (3) and the bottom is fixedly connected to the fixing plate (2). A protective cover (8) is attached to the outer wall of the heat-conducting fixing plate (10). A heat-insulating fixing plate (9) is attached to the inner wall of the protective cover (8). A support column (11) is fixedly connected between adjacent heat-insulating fixing plates (9). The bottom outer wall of the support column (11) is fixedly connected to the bolt (3) and the bottom is fixedly connected to the fixing plate (2).

2. The anti-deformation reinforcement device for the inner shroud of an annular furnace according to claim 1, characterized in that, The cooling cavity (5) is fixedly connected to a water inlet (6), which penetrates the outer wall of the cooling cavity (5) and communicates with the interior of the cooling cavity (5).

3. The anti-deformation reinforcement device for the inner shroud of an annular furnace according to claim 2, characterized in that, A vent hole (7) is fixedly connected to the top of the cooling chamber (5). The vent hole (7) passes through the top of the cooling chamber (5) and communicates with the interior of the cooling chamber (5).

4. The anti-deformation reinforcement device for the inner shroud of an annular furnace according to claim 1, characterized in that, The top of the base plate (1) is provided with a threaded hole, and the bottom of the fixing plate (2) is provided with a threaded hole corresponding to the base plate (1). The outer wall of the bolt (3) is threadedly connected to the threaded holes of the base plate (1) and the fixing plate (2).

5. The anti-deformation reinforcement device for the inner shroud of an annular furnace according to claim 1, characterized in that, The reinforcing rib (4) has a right-angled triangular plate structure, and multiple reinforcing ribs (4) are evenly distributed around the outer wall of the cooling cavity (5).

6. The anti-deformation reinforcement device for the inner shroud of an annular furnace according to claim 1, characterized in that, The heat-conducting fixing plate (10) has an arc-shaped plate structure, and multiple heat-conducting fixing plates (10) are distributed circumferentially along the outer wall of the cooling cavity (5).

7. The anti-deformation reinforcement device for the inner shroud of an annular furnace according to claim 1, characterized in that, The heat insulation fixing plate (9) has an arc-shaped plate structure, and multiple heat insulation fixing plates (9) are distributed circumferentially along the inner wall of the protective cover (8) to form a ring support structure.

8. The anti-deformation reinforcement device for the inner shroud of an annular furnace according to claim 1, characterized in that, The support column (11) has a cylindrical structure and is made of metal.

9. The anti-deformation reinforcement device for the inner shroud of an annular furnace according to claim 1, characterized in that, The cooling chamber (5) is an annular hollow shell structure, and the cooling chamber (5) contains cooling water.

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