An infrared radiation heater

Abstract

The present invention provides an infrared radiation heater, comprising a frame, the frame comprising four side panels, the four side panels enclosing a through installation space with four sides closed; a gland, the gland is arranged at the bottom opening of the frame, and the gland is provided with a main air inlet; a guide plate, the guide plate is arranged at the inner top wall of the gland, and an air flow gap is provided between the guide plate and each inner wall of the gland for medium gas to flow around; a porous uniform radiation plate, the porous uniform radiation plate is provided with a plurality of evenly arranged combustion through holes, the porous uniform radiation plate is arranged in the through installation space and located above the guide plate; a heat storage radiation plate, the heat storage radiation plate is arranged in the through installation space and located above the porous uniform radiation plate. The defects of uneven heating and low heat utilization rate of radiation heaters in the prior art are solved.

Description

Technical Field

[0001] The invention relates to the technical field of steelmaking and continuous casting production, in particular to an infrared radiation heater. Background Art

[0002] The baking machine is one of the important equipment for baking metal products in the metallurgical field. During operation, the metal products are baked and heated to the temperature required by the process to meet the requirements of metal smelting.

[0003] At present, the main method for baking and heating metal products is to use infrared radiation heating devices. However, the existing infrared radiation heating equipment has uneven heating temperature, which may cause the metal products to deform due to uneven temperature during the baking and heating process, affecting the quality and yield of the finished products; and the thermal efficiency of the existing infrared radiation heaters is also low. Summary of the invention

[0004] In view of the above-mentioned defects of the prior art, an object of the present invention is to provide an infrared radiation heater for solving the problems of uneven heating and low thermal efficiency of the infrared radiation heater in the prior art.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides an infrared radiation heater, including a frame, the frame including four side panels, the four side panels enclosing a through installation space with four sides closed; a pressure cover, the pressure cover is arranged at the bottom opening of the frame, and the pressure cover is provided with a main air inlet hole; a guide plate, the guide plate is arranged at the inner top wall of the pressure cover, and an air flow gap is provided between the guide plate and the inner walls of the pressure cover for allowing medium gas to flow around; a porous uniform emission plate, the porous uniform emission plate is provided with a plurality of evenly arranged combustion through holes, the porous uniform emission plate is arranged in the through installation space and located above the guide plate; a heat storage radiation plate, the heat storage radiation plate is arranged in the through installation space and located above the porous uniform emission plate.

[0006] Preferably, a first sealing gasket is provided between the pressure cover and the porous uniform radiation plate, the first sealing surface of the first sealing gasket is made of graphite, and the second sealing surface of the first sealing gasket is made of aluminum silicate fiber felt, wherein the first sealing surface is in contact with the pressure cover, and the second sealing surface is in contact with the porous uniform radiation plate.

[0007] Preferably, the guide plate is made of mirror-finished stainless steel.

[0008] Preferably, a guide assembly is provided on a side of the guide plate close to the pressure cover, and the guide assembly includes a guide tube and a guide cap, wherein the guide tube is fixedly arranged on the guide plate, and the guide cap includes a connecting rod, a conical cap body is provided on the top of the connecting rod, and the bottom of the connecting rod is welded and fixed to the guide tube by a silver-based brazing material, an elastic element is sandwiched between the conical cap body and the guide tube, and the elastic element is in a compressed state; wherein the conical cap body corresponds to the main air inlet hole on the pressure cover; the melting point of the silver-based brazing material is 600°C to 800°C.

[0009] Preferably, an open groove is provided on the circumferential surface of the flow guide tube, the connecting rod is inserted into the flow guide tube, and the bottom of the connecting rod is fixed to the inside of the flow guide tube by welding with a silver-based brazing material.

[0010] Preferably, four ceramic installation strips are arranged around the inner periphery of the installation space, the four ceramic installation strips enclose a installation groove, and the heat storage radiation plate is installed in the installation groove.

[0011] Preferably, a second sealing gasket is provided between the ceramic mounting strip and the porous scattering plate, and the material of the second sealing gasket is aluminum silicate fiber felt.

[0012] Preferably, the porous uniform radiation plate is provided with a groove, the guide plate is provided with an avoidance notch corresponding to the groove, the pressure cover is provided with a sealing cover corresponding to the groove, a third sealing gasket is provided between the groove and the sealing cover, and the sealing cover and the part of the porous uniform radiation plate covered by the sealing cover form a ventilation space enclosed on all sides; the sealing cover is also provided with a pair of air inlet holes.

[0013] Preferably, the gland is detachably connected to the bottom opening of the frame.

[0014] Preferably, buckles are provided on the left and right sides of the frame, a spring sheet is provided on the pressure cover, and two ends of the spring sheet are respectively clamped in the buckles on the left and right sides of the frame.

[0015] As described above, the infrared radiation heater of the present invention has the following beneficial effects:

[0016] The infrared radiation heater of the present invention can make the medium gas flow evenly to the multiple combustion holes on the porous uniform radiation plate for stable combustion through the arrangement of the guide plate, and through the arrangement of the guide plate, the heat radiation generated by the combustion in the combustion holes will be reflected to the porous uniform radiation plate through the guide plate to reduce the temperature fluctuation amplitude of the porous uniform radiation plate and improve the utilization rate of heat. In addition, through the multiple combustion holes evenly arranged on the porous uniform radiation plate, the porous uniform radiation plate can diffuse the high-temperature smoke generated by the combustion more evenly, so that the metal product device can be heated more evenly, and the manufacturing quality of the process metal product and the yield rate of the metal product are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a first view of the infrared radiation heater provided by the present invention.

[0018] Figure 2 Shown is a second view of the infrared radiation heater provided by the present invention.

[0019] Figure 3 Shown is an internal cross-sectional view of the infrared radiation heater provided by the present invention.

[0020] Figure 4 Shown is a cross-sectional view of the multi-aperture diffuser provided by the present invention.

[0021] Figure 5 Shown is an exploded view of the infrared radiation heater provided by the present invention.

[0022] Figure 6 Shown is a structural explosion diagram of the guide plate provided by the present invention.

[0023] Description of Reference Numerals

[0024] 10 Framework

[0025] 101 Through-mount space

[0026] 11 Buckle

[0027] 20 Gland

[0028] 201 Main air intake

[0029] 202 Airflow clearance

[0030] 203 Auxiliary air intake

[0031] 21 Deflector

[0032] 210 Avoid the gap

[0033] 211 Third sealing gasket

[0034] 212 Guide tube

[0035] 213 Open slot

[0036] 214 Spring

[0037] 215 guide cap

[0038] 2151 Connecting rod

[0039] 2152 Conical cap

[0040] 30 Multi-hole diffuser

[0041] 31 First gasket

[0042] 301 Burning Through Hole

[0043] 3011 Conical flare

[0044] 302 Connecting pin

[0045] 303 Groove

[0046] 40 Thermal radiation panels

[0047] 41 Ceramic mounting strip

[0048] 410 tongue and groove

[0049] 42 Second sealing gasket

[0050] 22 Spring Leaf DETAILED DESCRIPTION

[0051] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0052] In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0054] See also Figures 1 to 6 It should be noted that the illustrations provided in this embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, and the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0055] The present invention provides an infrared radiation heater, such as Figures 1 to 4 As shown, the radiation heater includes a frame 10, and the frame 10 includes four side panels, and the four side panels enclose a through installation space 101 which is closed on all sides; a gland 20 is arranged at the bottom opening of the frame 10, and a main air inlet 201 is arranged on the gland 20, and a guide plate 21 is arranged on the inner top wall of the gland 20, and an air flow gap 202 is arranged between the guide plate 21 and each inner wall of the gland 20 for the medium gas to flow around; a porous uniform radiation plate 30 is arranged in the through installation space 101 of the frame 10, and the porous uniform radiation plate 30 is located above the guide plate 21, and a plurality of uniformly arranged combustion through holes 301 are arranged on the porous uniform radiation plate 30, and a heat storage radiation plate 40 is also arranged in the through installation space 101, and the heat storage radiation plate 40 is located above the porous uniform radiation plate 30.

[0056] When the infrared radiation heater of the present invention is used, Figure 3As shown, the mixture of fuel gas and combustion-supporting gas is introduced into the air flow gap 202 between the inner wall of the pressure cover 20 and the guide plate 21 through the main air inlet hole 201 on the pressure cover 20, and the mixture of fuel gas and combustion-supporting gas will flow to the top of the guide plate 21 more evenly through the air flow gap 202 between the four side edges of the guide plate 21 and the inner walls around the pressure cover 20, and then enter the multiple combustion holes 301 evenly arranged on the porous uniform radiation plate 30 for combustion, and the high-temperature gas generated by the combustion will be more evenly emitted through the multiple combustion holes 301 on the porous uniform radiation plate 30 to evenly heat the heat storage radiation plate 40, so that the heat storage radiation plate 40 can radiate heat more evenly to heat and bake the metal products; at the same time, through the setting of the guide plate, the heat radiation generated by the combustion in the combustion holes can be reflected backward through the guide plate to the porous uniform radiation plate, so as to reduce the temperature fluctuation amplitude of the porous uniform radiation plate and improve the heat utilization rate.

[0057] Specifically, in this embodiment, the guide plate 21 is made of mirror stainless steel, and the porous uniform radiation plate 30 is made of cordierite mullite. This design and selection of materials are characterized by high temperature resistance and longer service life.

[0058] Further, such as Figure 4 As shown, in this embodiment, a conical expansion opening 3011 is provided at the upper end of the combustion through hole 301, i.e., the end away from the guide plate. The design of the conical expansion opening 3011 helps to diffuse and distribute the high-temperature flue gas more evenly in the upper area of ​​the porous uniformly emitting plate 30.

[0059] Further, such as Figure 5 and Figure 6As shown, in the present embodiment, a guide assembly is provided on one side of the guide plate 21 close to the gland 20, specifically, the guide assembly includes a guide tube 212 and a guide cap 215, wherein the guide tube 212 is fixedly arranged on the guide plate 21, the guide cap 215 includes a connecting rod 2151 and a conical cap body 2152 arranged on the top of the connecting rod, the bottom of the connecting rod 2151 of the guide cap 215 is welded and fixed to the guide tube 212 by a silver-based brazing material, an elastic element is sandwiched between the conical cap body 2152 and the guide tube 212, and the elastic element is in a compressed state; specifically, the conical cap body 2152 corresponds to the main air inlet 201 on the gland 20, and the melting point of the silver-based brazing material is 600°C to 800°C. By setting this guide component, when the fuel gas and the combustion-supporting gas are passed from the main air inlet 201 to between the gland 20 and the guide plate 21, the conical cap body 2152 of the guide cap 215 can guide the fuel gas and the combustion-supporting gas (medium gas) to flow evenly around the guide plate 21, so that the introduced medium gas flows relatively evenly from the air flow gap 202 between the four side edges of the guide plate 21 and the inner walls around the gland 20 to the top of the guide plate 21, further improving the radiation efficiency of the infrared radiation heater. The uniformity of the injection temperature; when tempering occurs, the temperature of the guide plate 21 rises, the silver-based brazing material will melt, the guide cap 215 is disconnected from the guide tube 212, and the elastic element resumes the free extension state, so that the elastic element will pop out the guide cap 215 backward (i.e., in the direction close to the gland), and the conical cap body 2152 of the guide cap 215 will just block the main air inlet 201 on the gland, so it can timely block the air inlet, prevent the flame from spreading, and improve the safety of the operation.

[0060] Preferably, Figure 6 As shown, in this embodiment, the elastic element is a spring 214. The guide cap 215 and the guide tube 212 are used as brazing base materials, preferably stainless steel 304, with a melting point temperature of about 1400°C.

[0061] The brazing material is made of selected silver-based brazing material, the melting point of which is between 600 and 800°C, which not only ensures the welding strength but also a firm connection when tempering does not occur; when tempering occurs, it can also ensure the fusing effect, and the flame temperature is much higher than the melting point of the welding material, so that the fire-blocking slingshot, i.e. the guide component, can quickly act to realize the fire-blocking function and protect other equipment from being affected.

[0062] Specifically, in this embodiment, a silver-based brazing material of model BAg25CuZnSn can be selected, and the chemical composition (mass fraction) / % of the BAg25CuZnSn is: Ag24.0-26.0, Cu39.0-41.0, Zn31.0-35.0, Sn1.5-2.5. The liquidus line, that is, the melting point of the BAg25CuZnSn is 760°C.

[0063] Further, such as Figure 6 As shown, in this embodiment, the connecting rod 2151 of the guide cap 215 is inserted into the guide tube 212, and the bottom of the connecting rod 2151 is fixed to the inside of the guide tube by welding with a silver-based brazing material. Accordingly, an open groove 213 is provided on the circumference of the guide tube 212, and the opening groove 213 is provided to facilitate welding of the connecting rod 2151 and the inside of the guide plate. Through this structural design, that is, inserting the connecting rod 2151 into the guide tube 212 can reduce the height of the guide assembly.

[0064] Furthermore, in order to prevent the combustion of the mixed gas of the fuel gas and the combustion-supporting gas in the combustion space 210 from causing the burning flame to jump out of the frame 10 from the gap between the gland 20 and the porous diffuser 30, preferably, as Figure 5 As shown, in the present embodiment, a first sealing gasket 31 is provided between the pressure cover 20 and the porous uniform radiation plate 30, and the first sealing surface of the first sealing gasket 31 is made of graphite, and the second sealing surface of the first sealing gasket 31 is made of aluminum silicate fiber felt. The first sealing surface of the first sealing gasket 31 is in contact with the pressure cover 20, and the second sealing surface of the first sealing gasket 31 is in contact with the porous uniform radiation plate 30. This structural design is characterized in that it can better improve the sealing performance.

[0065] Further, such as Figure 4 As shown, in this embodiment, four ceramic mounting strips 41 are arranged around the inner periphery of the mounting space 101, and the four ceramic mounting strips 41 enclose a mounting groove, and the heat storage radiation plate 40 is installed in the mounting groove. This structural design can insulate the heat storage radiation plate 40, reduce the heat loss of the infrared heat storage radiation plate 40, and improve the heat utilization rate.

[0066] Furthermore, in order to install the heat storage radiation plate 40 more stably, in the present embodiment, a group of two ceramic mounting strips 41 opposite to each other among the four ceramic mounting strips are provided with a mortise and tenon 410, and correspondingly, tenons are provided at both ends of the heat storage radiation plate 40, and the tenons at both ends of the heat storage radiation plate 40 are respectively inserted into the mortise and tenon of the corresponding two ceramic mounting strips 41.

[0067] Further, such as Figure 4 As shown, in this embodiment, a second sealing pad 42 is provided between the ceramic mounting bar 41 and the porous scattering plate 30. Specifically, the second sealing pad 42 is made of aluminum silicate fiber felt. This structural design can prevent the heat between the ceramic mounting bar and the porous scattering plate 40 from escaping from the surroundings of the frame.

[0068] Specifically, Figure 5As shown, in this embodiment, two multi-hole diffuser plates 30 are provided, and the two multi-hole diffuser plates 30 are connected together by a connecting pin 302 .

[0069] Furthermore, in order to increase the heating efficiency of the infrared radiation heater, a combustion-supporting gas may be added to the infrared radiation heater as required during use. Figure 5 As shown, a groove 303 is provided on the porous uniform radiation plate 30, and correspondingly, a relief notch 210 corresponding to the groove 301 on the porous uniform radiation plate 30 is provided on the guide plate 21, a sealing cover corresponding to the groove 303 is provided on the pressure cover 20, and a third sealing gasket 211 is provided between the sealing cover and the groove 301, and the sealing cover and the part of the porous uniform radiation plate 30 covered by the sealing cover form a ventilation space sealed all around, and specifically, the sealing cover is also provided with a secondary air inlet 203. During operation, since the sealing cover is tightly fitted with the groove 31 on the porous uniform radiation plate 30, a closed space is formed between the sealing cover and the part of the porous uniform radiation plate 30 covered by the sealing cover. During the baking operation, the gas can be directly introduced through the auxiliary air inlet 203 on the sealing cover as needed, that is, the gas is directly introduced into the ventilation space formed by the sealing cover and the part of the porous diffuser plate 30 covered by the sealing cover, and then enters the gas through holes on the porous diffuser plate 30 for combustion. Through this structural design, when the temperature of the edge area of ​​the infrared radiation heater is low, the gas can be directly introduced through the auxiliary air inlet 203 to increase the combustion at the edge of the porous diffuser plate, so that the temperature of the edge and the middle area of ​​the porous diffuser plate is more uniform.

[0070] Specifically, in the present embodiment, the heat storage radiation plate 40 is made of silicon carbide, which has the characteristics of high temperature resistance and longer service life.

[0071] Furthermore, in order to facilitate the later maintenance of the infrared radiation heater, preferably, in this embodiment, the pressure cover 20 is detachably connected to the bottom opening of the frame 10. Specifically, as Figure 2 As shown, buckles 11 are provided on the left and right sides of the frame 10, and a spring sheet 22 is provided on the pressure cover 20. The two ends of the spring sheet 22 are respectively clamped in the buckles 11 on the left and right sides of the frame.

[0072] In summary, the infrared radiation heater of the present invention has high heat utilization rate, reduces heat loss, and can radiate heat more evenly to heat and bake metal products and devices; the setting of the guide component can improve the uniformity of medium gas distribution during normal operation. When tempering occurs, the brazing part is quickly heated and melted, and the spring pushes the guide cap to separate from the guide tube, so that the guide cap blocks the air inlet and prevents the flame from spreading, improving the safety of operation, and has a simple structure, low manufacturing cost, and high economy. Therefore, the present invention can effectively overcome the various defects in the prior art and has a high industrial utilization value.

[0073] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. An infrared radiation heater, characterized in that: include: A frame, the frame comprising four side panels, the four side panels enclosing a through-mounting space that is closed on all sides; A gland, which is arranged at the bottom opening of the frame and has a main air inlet hole; A guide plate, wherein the guide plate is arranged at the inner top wall of the gland, and an air flow gap is provided between the guide plate and each inner wall of the gland for allowing the medium gas to flow around; A porous scattering plate, on which a plurality of evenly arranged combustion through holes are provided, and the porous scattering plate is arranged in the through-installation space and above the guide plate; A heat storage radiation plate is arranged in the through installation space and above the multi-hole uniform radiation plate.

2. An infrared radiation heater according to claim 1, characterized in that: A first sealing gasket is provided between the pressure cover and the porous uniform radiation plate, wherein the first sealing surface of the first sealing gasket is made of graphite, and the second sealing surface of the first sealing gasket is made of aluminum silicate fiber felt, wherein the first sealing surface is in contact with the pressure cover, and the second sealing surface is in contact with the porous uniform radiation plate.

3. The infrared radiation heater according to claim 1, characterized in that: The guide plate is made of mirror-finished stainless steel.

4. The infrared radiation heater according to claim 1, characterized in that: A guide assembly is provided on one side of the guide plate close to the gland, and the guide assembly includes a guide tube and a guide cap, wherein the guide tube is fixedly arranged on the guide plate, and the guide cap includes a connecting rod, a conical cap body is provided on the top of the connecting rod, and the bottom of the connecting rod is welded and fixed to the guide tube by a silver-based brazing material, an elastic element is sandwiched between the conical cap body and the guide tube, and the elastic element is in a compressed state; wherein the conical cap body corresponds to the main air inlet hole on the gland; and the melting point of the silver-based brazing material is 600°C to 800°C.

5. The infrared heater according to claim 4, characterized in that: An open groove is arranged on the peripheral surface of the flow guide tube, the connecting rod is inserted in the flow guide tube, and the bottom of the connecting rod is fixed to the inside of the flow guide tube by welding with a silver-based brazing material.

6. The infrared radiation heater according to claim 1, characterized in that: Four ceramic installation strips are arranged around the inner periphery of the installation space, and the four ceramic installation strips enclose a installation groove, and the heat storage radiation plate is installed in the installation groove.

7. The infrared radiation heater according to claim 5, characterized in that: A second sealing gasket is provided between the ceramic mounting strip and the porous scattering plate, and the material of the second sealing gasket is aluminum silicate fiber felt.

8. The infrared radiation heater according to claim 1, characterized in that: The porous uniform radiation plate is provided with a groove, the guide plate is provided with an avoidance notch corresponding to the groove, the pressure cover is provided with a sealing cover corresponding to the groove, a third sealing gasket is provided between the groove and the sealing cover, and the sealing cover and the part of the porous uniform radiation plate covered by the sealing cover form a ventilation space closed on all sides; the sealing cover is also provided with a pair of air inlet holes.

9. The infrared radiation heater according to claim 1, characterized in that: The pressure cover is detachably connected to the bottom opening of the frame.

10. The infrared radiation heater according to claim 9, characterized in that: Buckles are arranged on the left and right sides of the frame, a spring sheet is arranged on the pressure cover, and two ends of the spring sheet are respectively clamped in the buckles on the left and right sides of the frame.

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