Heat accumulating type gas heating furnace

Abstract

The utility model provides a heat accumulating type gas heating furnace which comprises a heating furnace main body, the heating furnace main body is formed by connecting two groups of side plates and a group of top plates, one group of side plates of the heating furnace main body is detachably and fixedly connected with a plurality of groups of maintenance plates, the maintenance plates are made of heat insulation materials, and each group of maintenance plates is provided with a connecting assembly. The top of the connecting assembly penetrates through the overhauling plate and extends into the heating furnace body, an adjustable conversion assembly is installed at the top of the connecting assembly, and meanwhile a conversion control mechanism used for controlling the conversion assembly to rotate is further arranged on one side of the connecting assembly and fixedly installed on the overhauling plate. And the switching control mechanism is connected with a control system for controlling the heating furnace. By arranging the fire uniformizing cover, sprayed flames are more uniform, the coverage area of the flames is larger, uniform radiation of the temperature in the combustion chamber is further facilitated, the density of the combustion nozzles needing to be installed in the combustion chamber is reduced, the equipment cost is further reduced, and the economical efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal processing, in particular to a heat storage type gas heating furnace. Background Art

[0002] In the metallurgical industry, a heating furnace is a device that heats materials or workpieces to the rolling and forging temperature. A regenerative heating furnace is a type of heating furnace that is currently widely used. It uses an independently set regenerative chamber or regenerative burner to preheat the air or gas, making the heating more stable and uniform, saving energy. To ensure uniform temperature in the combustion chamber, multiple groups of burners need to be evenly installed in the regenerative heating furnace. By setting up multiple groups of burners, the fuel and air are evenly distributed, thereby improving combustion efficiency and reducing the fuel for complete combustion. It can also better control the temperature distribution in the combustion chamber to avoid uneven calcination of workpieces caused by local overheating or overcooling.

[0003] Most of the burners in existing heating furnaces are fixedly installed inside. After long-term use, the burners will inevitably be damaged. If one or more groups of burners are damaged during the processing, it is difficult to replace them in time. Uneven temperature will gradually appear in the combustion chamber, resulting in incomplete processing and affecting the subsequent forging effect.

[0004] After searching, it was found that the Chinese patent with publication number CN 220062560 U proposed a chamber-type regenerative gas heating furnace, including a furnace door device, a furnace mouth guard plate, a regenerative burner, a furnace body device, a blower, an induced draft fan, a reversing valve and a Y-shaped duct. An opening is provided on one side of the furnace body device, a furnace mouth guard plate is fixed to the lower end of the opening, and two regenerative burners are provided on the front and rear sides of the furnace body device, and the front and rear corresponding regenerative burners form a group, and a furnace door device is installed on the furnace body device to close the opening of the furnace body device, and a Y-shaped duct is installed on each regenerative burner, one opening of the Y-shaped duct is connected to the inlet of the blower through the duct, and the other opening of the Y-shaped duct is connected to the outlet of the induced draft fan through the duct, and a reversing valve is provided at the connection between the Y-shaped duct and the induced draft fan and the blower. The heating furnace can still be used and worked. The chamber-type regenerative gas heating furnace has a simple structure, is easy to operate, can save a lot of energy, and can effectively preheat the air.

[0005] In the above technical solution, two groups of burners are used alternately to heat the combustion chamber respectively, but the two groups of burners are installed at two locations in the combustion chamber at intervals. The alternating use of the two groups of burners will cause the position of the combustion point to change, thereby causing local temperature fluctuations in the combustion chamber, which is not conducive to the uniform distribution of temperature in the combustion chamber. Moreover, since the flames around the burners are more concentrated, the temperature at the burners gradually decreases radiating toward the surroundings. The columnar flames ejected by the existing burners have a small combustion range. In order to ensure the temperature balance in the combustion chamber, the density of the burners that need to be installed is relatively large, which increases the equipment cost and is less economical. Summary of the Utility Model

[0006] The purpose of the present utility model is to address the deficiencies of the prior art and provide a regenerative gas heating furnace. By setting up a flame equalizing hood, the problem that the flame range ejected by the existing burner is small, resulting in a large density of burners to be installed and high equipment costs, is solved.

[0007] To achieve the above object, the present utility model provides the following technical solution: A regenerative gas heating furnace includes a heating furnace main body, which is formed by connecting two groups of side plates and one group of top plates. A plurality of maintenance plates are detachably and fixedly connected to one of the side plates of the heating furnace main body. The maintenance plates are made of heat-insulating materials. Each maintenance plate is provided with a connection component. The top of the connection component penetrates through the maintenance plate and extends into the heating furnace main body. An adjustable conversion component is installed at the top of the connection component. At the same time, a conversion control mechanism for controlling the rotation of the conversion component is also provided on one side of the connection component. The conversion control mechanism is fixedly installed on the maintenance plate, and the conversion control mechanism is connected to the control system for controlling the heating furnace.

[0008] Preferably, the connection component includes a tee pipe with a connection component group interface. Two of the interfaces of the tee pipe are respectively called a gas pipe interface and an air pipe interface. A mixing chamber is fixedly connected to the other interface of the tee pipe.

[0009] Preferably, the mixing chamber has a spherical cavity structure. An air outlet is provided on the side wall of the mixing chamber. A positioning block is also fixedly connected to the side wall of the mixing chamber. Preferably, there are two groups of positioning blocks, and the two groups of positioning blocks are symmetrically distributed on the outer surface of the mixing chamber with the tee pipe as the center.

[0010] Preferably, the conversion component includes two conversion hoods. The two conversion hoods can be combined to form a sphere with an inner diameter equal to the outer diameter of the mixing chamber. A burner nozzle is fixedly connected to the outer side wall of the conversion hood. A flame equalizing hood is fixedly connected to the top of the burner nozzle for ejecting a uniform flame.

[0011] Preferably, the conversion hood includes a hood head with a hemispherical structure. A burner interface is provided on the side wall of the hood head. When the hood head covers the mixing chamber, the burner interface and the air outlet are on the same meridian.

[0012] Preferably, a limiting hole is also provided on the side wall of the hood head. The limiting hole is adapted to the positioning block. A first fitting block is fixedly connected to one side of one of the hood heads, and a first card slot adapted to the first fitting block is provided at the corresponding position of the other hood head that is combined with it.

[0013] Preferably, one side of the hood is fixedly connected to a hood tail with a semi-straight cylinder structure, and a toothed ring is fixedly connected to the hood tail. When the conversion component is installed on the connection component and the connection component is installed on the inspection plate, the tail end of the toothed ring penetrates through the inspection plate and extends to the outside of the heating furnace body, and one side of the toothed ring is the conversion control mechanism.

[0014] Preferably, the output end of the conversion control mechanism is fixedly connected to a conversion gear that cooperates with the toothed ring.

[0015] Preferably, a second fitting block is provided on one side of the hood tail, and a second card slot adapted to the second fitting block is provided at a position corresponding to the second fitting block on the other side of the hood tail.

[0016] Preferably, the equalizing hood has an asymmetric spindle-shaped cavity structure. A plurality of groups of flame spraying holes are provided on the side wall of the equalizing hood, and a plurality of groups of equalizing baffles are provided inside the equalizing hood. The equalizing baffles are arranged between adjacent two groups of the flame spraying holes and are fixedly connected to the inner wall of the equalizing hood.

[0017] The beneficial effects of the present utility model are as follows:

[0018] By providing a conversion component, two groups of burner nozzles can be switched and used with each other. When one group of burner nozzles is damaged, it is convenient to switch to the other group in time, avoiding the situation of uneven processing caused by untimely replacement after the burner is damaged. At the same time, since the conversion component uses a rotary switching method, the combustion point is fixed, avoiding the uneven temperature in the combustion chamber caused by the non-fixed combustion point, and further avoiding the situation of uneven processing, effectively improving the processing quality.

[0019] By providing an equalizing hood, the ejected flame is more uniform and the flame coverage area is larger, which is conducive to the uniform radiation of the temperature in the combustion chamber, reducing the density of the burners to be installed in the combustion chamber, thereby reducing the equipment cost and effectively improving the economy.

[0020] In summary, the present utility model has the advantages that the damaged burner can be replaced in time, the combustion point position of the replaced burner is fixed, which is conducive to maintaining the temperature balance in the combustion chamber, and at the same time increasing the combustion area, which is conducive to reducing the equipment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 is a schematic diagram of the cooperation structure of the connection component and the conversion component in the present utility model;

[0023] Figure 3 is a schematic diagram of the three-dimensional structure of the connection component in the present utility model;

[0024] Figure 4 This is a partially sectional perspective structural schematic diagram of the connection component and the conversion component in the present utility model;

[0025] Figure 5 is Figure 4 the enlarged perspective structural schematic diagram at position A in;

[0026] Figure 6 This is a perspective structural schematic diagram of the conversion cover body in the present utility model.

[0027] In the figure: 1, main body of the heating furnace; 2, inspection plate; 3, connection component; 4, conversion control mechanism; 5, conversion component; 6, tee pipe; 7, gas pipe interface; 8, air pipe interface; 9, mixing chamber; 10, positioning block; 11, air outlet; 12, conversion cover body; 13, burner nozzle; 14, flame equalizing cover; 15, flame equalizing baffle; 16, flame spraying hole; 17, cover head; 18, cover tail; 19, toothed ring; 20, burner interface; 21, first fitting block; 22, second fitting block; 23, limiting hole; 24, conversion gear. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0031] Embodiment 1

[0032] As Figures 1-6 shown, this embodiment provides a regenerative gas heating furnace, including a heating furnace main body 1. The heating furnace main body 1 is formed by connecting two groups of side plates and a group of top plates. A plurality of maintenance plates 2 are detachably and fixedly connected to one of the side plates of the heating furnace main body 1. The maintenance plates 2 are made of heat-insulating materials. A connecting component 3 is installed on each maintenance plate 2. The top of the connecting component 3 penetrates through the maintenance plate 2 and extends into the heating furnace main body 1. An adjustable conversion component 5 is installed at the top of the connecting component 3. At the same time, a conversion control mechanism 4 for controlling the rotation of the conversion component 5 is provided on one side of the connecting component 3. The conversion control mechanism 4 is fixedly installed on the maintenance plate 2 and is connected to the control system for controlling the heating furnace. The connecting component 3 includes a tee pipe 6 having three sets of interfaces of the connecting component 3. Two of the interfaces of the tee pipe 6 are respectively called a gas pipe interface 7 and an air pipe interface 8. The ports of the gas pipe interface 7 and the air pipe interface 8 are provided with flanges for facilitating connection with the gas pipe and the air pipe. The gas pipe interface 7 and the air pipe interface 8 are respectively used for conveying gas and air and sending the conveyed gases into a mixing chamber 9 for mixing, thereby facilitating fuel ignition. The other interface of the tee pipe 6 is fixedly connected with a mixing chamber 9. The mixing chamber 9 has a spherical cavity structure, and its function is to mix gas and air. The mixing chamber 9 is provided in a spherical structure to facilitate cooperation with the conversion component 5 and to facilitate the adjustment of the conversion component 5. An air outlet 11 is provided on the side wall of the mixing chamber 9. A positioning block 10 is also fixedly connected to the side wall of the mixing chamber 9. Preferably, there are two groups of positioning blocks 10, and the two groups of positioning blocks 10 are symmetrically distributed on the outer surface of the mixing chamber 9 with the tee pipe 6 as the center. The positioning block 10 can be used to position and guide the conversion component 5, facilitating the quick positioning and installation between the conversion component 5 and the connecting component 3, and also facilitating the directional adjustment of the conversion component 5.

[0033] According to Figures 2 to 4As shown, the conversion component 5 includes two sets of conversion hoods 12. The two sets of conversion hoods 12 can be assembled to form a sphere with an inner diameter equal to the outer diameter of the mixing chamber 9. A burner nozzle 13 is fixedly connected to the outer side wall of the conversion hood 12, and a flame equalizing hood 14 is fixedly connected to the top of the burner nozzle 13 for ejecting a uniform flame. The conversion hood 12 includes a hood head 17 with a hemispherical structure. A burner interface 20 is provided on the side wall of the hood head 17. The port of the burner interface 20 is provided with a flange for facilitating connection with the burner nozzle 13. When the hood head 17 covers the mixing chamber 9, the burner interface 20 and the air outlet 11 are located on the same meridian. When the hood head 17 rotates relative to the mixing chamber 9, the burner interface 20 will pass through the air outlet 11 and coincide with it completely at a certain point. At this time, the burner nozzle 13 is connected to the inside of the mixing chamber 9, and the burner nozzle 13 is in a normal use state. A limiting hole 23 is also provided on the side wall of the hood head 17. The limiting hole 23 is adapted to the positioning block 10. The limiting hole 23 is a keyway structure with one end open, but a compensation slot hole for the limiting hole 23 is provided on the other side of the hood head 17 opposite to the limiting hole 23. When the two hood heads 17 are assembled and cover the mixing chamber 9, the limiting hole 23 and its compensation slot hole are correspondingly assembled into a whole and surround the positioning block 10 therein. After one end of the positioning block 10 abuts against one end of the tooth ring 19, by rotating the conversion hood 12, the positioning block 10 can be rotated relative to the tooth ring 19 until the other end of the positioning block 10 abuts against the other end of the replenishment slot hole of the tooth ring 19. At this time, the rotation angle of the conversion hood 12 is 180 degrees, and the positions of the two burner nozzles 13 are exchanged. The cooperation connection between the limiting hole 23 and the positioning block 10 can play a guiding and limiting role for the conversion hood 12, limit the rotation direction of the conversion hood 12, and enable the burner interface 20 to always move on the same meridian as the air outlet 11, facilitating the coincidence of the burner interface 20 and the air outlet 11, so as to accurately switch the positions of the two burner nozzles 13. A first fitting block 21 is fixedly connected to one side of one set of hood heads 17, and a first card slot adapted to the first fitting block 21 is provided at the corresponding position of the other set of hood heads 17 that is assembled with it.

[0034] According to Figures 4 to 6As shown, one side of the hood 17 is fixedly connected to a hood tail 18 with a semi-straight cylinder structure. A toothed ring 19 is fixedly connected to the hood tail 18. When the conversion assembly 5 is installed on the connection assembly 3 and the connection assembly 3 is installed on the inspection plate 2, the tail end of the toothed ring 19 penetrates through the inspection plate 2 and extends to the outside of the heating furnace body 1. One side of the toothed ring 19 is a conversion control mechanism 4. The output end of the conversion control mechanism 4 is fixedly connected to a conversion gear 24 that is cooperatively connected with the toothed ring 19. The hood tail 18 can be cooperatively connected with the conversion control mechanism 4, facilitating the rotation adjustment of the conversion assembly 5 through the conversion control mechanism 4, and facilitating the switching use of the two groups of burner nozzles 13. A second fitting block 22 is provided on one side of the hood tail 18, and a second card slot adapted to the second fitting block 22 is provided at a position corresponding to the second fitting block 22 on the other side of the hood tail 18. When the two hoods 17 are assembled and cover the outside of the mixing chamber 9, by appropriately pressing the two hoods 17, the first fitting block 21 can be inserted into the first card slot, and the second fitting block 22 can be inserted into the corresponding second card slot to achieve quick snap connection and fixation between the two hoods 17, facilitating the installation and disassembly of the two hoods 17. The equalizing hood 14 has an asymmetrical spindle-shaped cavity structure. A number of groups of flame spraying holes 16 are provided on the side wall of the equalizing hood 14. A number of groups of equalizing baffles 15 are provided inside the equalizing hood 14. The equalizing baffles 15 are arranged between adjacent two groups of flame spraying holes 16 and are fixedly connected to the inner wall of the equalizing hood 14. The equalizing hood 14 is a closed cavity except for the flame spraying holes 16. After the gas passes through the burner nozzle 13 and enters the inside of the equalizing hood 14, the air flow is separated and guided by the equalizing baffles 15 and finally sprayed out from the flame spraying holes 16. At the same time, since the gas burner nozzle 13 is ignited after passing through, the ignited gas is in a combustion state when sprayed out from the flame spraying holes 16, that is, the flame sprayed out from the flame spraying holes 16 is uniform. By setting the equalizing hood 14, when the air flow is concentrated in the equalizing hood 14, the internal air pressure increases. When sprayed out through the flame spraying holes 16, the air flow is uniform and stable, the area of the sprayed flame increases, the flame flow is stable and the flame tongue is longer, optimizing the flame quality, making the temperature in the combustion chamber more uniform, reducing the situation of excessive local temperature fluctuation, and effectively improving the calcination quality.

[0035] Working steps

[0036] Step 1: First, install the burner nozzles 13 with the soaking hoods 14 onto the corresponding burner interfaces 20 respectively through bolts. Then, cover the two sets of conversion hoods 12 outside the mixing chamber 9 and merge and fix them. When the conversion hood 12 is covered outside the mixing chamber 9, it is necessary to make the limit holes 23 sleeved outside the positioning blocks 10. When the two sets of conversion hoods 12 are joined together, it is necessary to align the limit holes 23 on one set of conversion hood 12 with the compensation slot holes corresponding to the limit holes 23 on the other set of conversion hood 12. After the two sets of conversion hoods 12 are positioned respectively through the positioning blocks 10, by pressing the two conversion hoods 12, the first fitting blocks 21 can be embedded into the corresponding first card slots, and the second fitting blocks 22 can be embedded into the corresponding second card slots, thereby completing the splicing of the two sets of conversion hoods 12 and completing the installation between the conversion assembly 5 and the connection assembly 3.

[0037] Step 2: After the conversion assembly 5 and the connection assembly 3 are installed, the connection assembly 3 can be passed through the reserved hole on the inspection plate 2 to penetrate the inspection plate 2. A heat insulation gasket should be nested in the reserved hole on the inspection plate 2. The heat insulation gasket can pre-fix the connection assembly 3 and seal the inspection plate 2. Subsequently, connect and fix the gas pipeline and the air pipeline to the gas pipe interface 7 and the air pipe interface 8 respectively. Then, make the conversion gear 24 cooperate and connect with the toothed ring 19, and ensure that the conversion control mechanism 4 can control the rotation of the conversion assembly 5.

[0038] Step 3: Under the working state, one set of burner nozzles 13 is connected to the air outlet 11. The gas pipeline conveys gas, and the air pipeline conveys air. The gas enters the mixing chamber 9 through the three-way pipe 6 for mixing. The mixed fuel gas enters the burner nozzle 13 connected to it through the air outlet 11 and is ignited. The ignited flame fluid gathers in the soaking hood 14. After being stabilized by the soaking hood 14 and split and guided by the soaking baffle 15, the thinner flames are evenly ejected from the flame spraying holes 16 to calcine the workpiece. Controlled by the control system, during the flame calcination interval, the conversion control mechanism 4 drives the conversion gear 24 to rotate. The rotation of the conversion gear 24 drives the toothed ring 19 to rotate. The rotation of the toothed ring 19 drives the entire conversion assembly 5 to rotate along the positioning block 10 until the conversion assembly 5 rotates 180 degrees around the mixing chamber 9 and then stops, completing the switching of the positions of the two sets of burner nozzles 13. During the entire calcination process, the conversion control mechanism 4 can control the rotation and switching of the two sets of burner nozzles 13 until the calcination ends.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A regenerative gas heating furnace, comprising a heating furnace main body, the heating furnace main body is formed by connecting two groups of side plates and a group of top plates, a plurality of inspection plates are detachably and fixedly connected to one of the side plates of the heating furnace main body, the inspection plates are made of heat-insulating materials, and a connecting component is installed on each inspection plate, the top of the connecting component penetrates through the inspection plate and extends into the heating furnace main body, and is characterized in that, An adjustable conversion component is installed on the top of the connection component. At the same time, a conversion control mechanism for controlling the rotation of the conversion component is also arranged on one side of the connection component. The conversion control mechanism is fixedly installed on the inspection plate, and the conversion control mechanism is connected to the control system of the heating furnace.

2. The regenerative gas heating furnace according to claim 1, characterized in that, The connection component includes a tee pipe with connection component group interfaces. Two of the interfaces of the tee pipe are respectively called a gas pipe interface and an air pipe interface, and a mixing chamber is fixedly connected to the other interface of the tee pipe.

3. The regenerative gas heating furnace according to claim 2, wherein The mixing chamber has a spherical cavity structure. An air outlet is provided on the side wall of the mixing chamber. A positioning block is also fixedly connected to the side wall of the mixing chamber. There are two groups of positioning blocks, and the two groups of positioning blocks are symmetrically distributed on the outer surface of the mixing chamber with the tee pipe as the center.

4. The regenerative gas heating furnace according to claim 3, characterized in that, The conversion component includes two conversion covers. The two conversion covers can be assembled to form a sphere with an inner diameter equal to the outer diameter of the mixing chamber. A burner nozzle is fixedly connected to the outer side wall of the conversion cover. A flame equalizing cover is fixedly connected to the top of the burner nozzle for spraying uniform flames.

5. A regenerative gas heating furnace according to claim 4, characterized in that, The conversion cover includes a hemispherical cover head. A burner interface is provided on the side wall of the cover head. When the cover head covers the mixing chamber, the burner interface and the air outlet are on the same meridian.

6. The regenerative gas heating furnace according to claim 5, characterized in that, A limiting hole is also provided on the side wall of the cover head. The limiting hole is adapted to the positioning block. A first fitting block is fixedly connected to one side of one group of the cover heads, and a first card slot adapted to the first fitting block is provided at the corresponding position of the other cover head that is assembled with it.

7. The regenerative gas heating furnace according to claim 6, wherein, One side of the cover head is fixedly connected to a cover tail with a semi-cylindrical structure. A toothed ring is fixedly connected to the cover tail. When the conversion component is installed on the connection component and the connection component is installed on the inspection plate, the tail end of the toothed ring penetrates through the inspection plate and extends to the outside of the heating furnace body, and one side of the toothed ring is the conversion control mechanism.

8. The regenerative gas heating furnace according to claim 7, characterized in that, A conversion gear that is cooperatively connected with the toothed ring is fixedly connected to the output end of the conversion control mechanism.

9. The regenerative gas heating furnace according to claim 8, characterized in that, A second fitting block is provided on one side of the cover tail, and a second card slot adapted to the second fitting block is provided at the corresponding position on the other side of the cover tail.

10. A regenerative gas heating furnace according to claim 9, characterized in that, The flame equalizing cover has an asymmetric spindle-shaped cavity structure. A number of flame spraying holes are provided on the side wall of the flame equalizing cover. A number of flame equalizing baffles are arranged inside the flame equalizing cover. The flame equalizing baffles are arranged between adjacent two groups of the flame spraying holes and are fixedly connected to the inner wall of the flame equalizing cover.

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