Metal strip material and honeycomb heating body with same

Abstract

The utility model discloses a metal belt material and a honeycomb heating body with the same, and the metal belt material comprises a characteristic belt which is provided with a plurality of wave crest parts and wave trough parts, the wave crest parts and the wave trough parts are alternately arranged, first fire holes are formed between the adjacent wave crest parts, and second fire holes are formed between the adjacent wave trough parts; the partition structure comprises a first partition piece and / or a second partition piece, the first partition piece is arranged at the lower end of each first fire hole, and the first partition piece divides the lower end of each first fire hole into at least two small holes; a second partition piece is arranged at the lower end of each second fire hole and divides the lower end of each second fire hole into at least two small holes. The burner is simple in structure, convenient to manufacture, high in porosity and capable of reducing the tempering probability and improving the heat intensity of the fire holes.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a metal strip and a honeycomb heating element having the same. Background Art

[0002] Infrared burners on the market are significantly larger than atmospheric burners, but the heat load of infrared gas stoves is generally lower than that of atmospheric stoves. Within a certain range, a higher heat load is more suitable for stir-frying. The metal strips used in existing infrared burners are typically made of single or multiple layers of thin metal strips that are stacked, coiled, or wound, which poses a risk of flashback during ignition and combustion.

[0003] To address the flashback issue, Chinese invention patent ZL200710028113.2 discloses a metal strip with infrared radiation function for use in gas burners. This strip incorporates a mesh or fiber structure at the bottom of the honeycomb heating layer to prevent flashback. However, the pores in the mesh or fiber structure are too small, creating significant resistance when the gas passes through the underside of the strip, limiting the thermal intensity of the strip's fire holes. Consequently, to increase the heat load of infrared gas stoves, a larger metal strip must be used, increasing costs and hindering the widespread adoption of infrared gas stoves. Summary of the Invention

[0004] The present invention aims to at least partially address one of the problems existing in the prior art. To this end, the present invention provides a metal strip material that is simple in structure and easy to manufacture, has a high porosity, can reduce the probability of tempering, and improves the thermal intensity of the fire hole. The present invention also provides a honeycomb heating element.

[0005] According to the metal strip provided above, it is achieved through the following technical solutions:

[0006] A metal strip comprises: a characteristic strip having a plurality of alternately arranged crests and troughs, with first fire holes formed between adjacent crests and second fire holes formed between adjacent troughs; a barrier structure comprising a first barrier sheet and / or a second barrier sheet, wherein a first barrier sheet is provided at the lower end of each of the first fire holes, and the first barrier sheet separates the lower end of the first fire hole into at least two small holes; and a second barrier sheet is provided at the lower end of each of the second fire holes, and the second barrier sheet separates the lower end of the second fire hole into at least two small holes.

[0007] In some embodiments, the first barrier piece is formed by partially punching or rolling the lower end of the trough portion forward, and the upper and lower outer edges of the first barrier piece are cut and separated from the trough portion to form an opening;

[0008] The second barrier piece is formed by partially punching or rolling the lower end of the peak portion backward, and upper and lower outer edges of the second barrier piece are cut and separated from the peak portion to form an opening.

[0009] In some embodiments, adjacent first barrier sheets are located on the same or different vertical planes, and adjacent second barrier sheets are located on the same or different vertical planes.

[0010] In some embodiments, a first hollow protrusion is provided on the first barrier sheet and / or the second barrier sheet, and the first hollow protrusion divides one of the small holes into at least two microholes.

[0011] In some embodiments, a vent is formed on a side of the first hollow protrusion, an upper end of the first hollow protrusion is closed or open, and a lower end of the first hollow protrusion is closed or open.

[0012] In some embodiments, the barrier structure further includes a third barrier plate and / or a fourth barrier plate arranged vertically, wherein a third barrier plate is provided in the middle of each first fire hole, and the third barrier plate separates the middle of the first fire hole into at least two small holes; and a fourth barrier plate is provided in the middle of each second fire hole, and the fourth barrier plate separates the middle of the second fire hole into at least two small holes.

[0013] In some embodiments, the third spacer is formed by partially punching the middle portion of the trough portion forward, and the upper and lower outer edges of the third spacer are cut and separated from the trough portion to form an opening; the fourth spacer is formed by partially punching the middle portion of the crest portion backward, and the upper and lower outer edges of the fourth spacer are cut and separated from the crest portion to form an opening.

[0014] In some embodiments, adjacent third spacers are located on the same or different vertical planes, and the third spacer and the adjacent first spacer / the second spacer are located on the same or different vertical planes; adjacent fourth spacers are located on the same or different vertical planes, and the fourth spacer and the adjacent second spacer / the first spacer are located on the same or different vertical planes.

[0015] In some embodiments, a second hollow protrusion is provided on the third barrier sheet and / or the fourth barrier sheet, and the second hollow protrusion divides one of the small holes into at least two microholes.

[0016] In some embodiments, a vent is provided on a side surface of the second hollow protrusion, an upper end of the second hollow protrusion is closed or open, and a lower end of the second hollow protrusion is closed or open.

[0017] In some embodiments, a plurality of rows of first slit groups are provided on the characteristic band, which are located above the barrier structure and spaced apart in an upper and lower manner. Each row of the first slit groups includes a plurality of first slits spaced apart along the length direction of the characteristic band. Each first slit is arranged horizontally, and the first slits adjacent to each other in an upper and lower manner are staggered.

[0018] In some embodiments, the characteristic band includes a plurality of alternating flat segments and corrugated segments, and the corrugated segments have a plurality of alternating crests and troughs.

[0019] In some embodiments, multiple rows of second slit groups are arranged at intervals in the upper and lower directions on the planar segment, and each row of the second slit groups includes a plurality of second slits arranged at intervals along the length direction of the planar segment, each second slit is arranged horizontally, and the upper and lower adjacent second slits are arranged in an staggered manner.

[0020] In some embodiments, a wide flat band is further included, which is arranged on the back side of the characteristic band and connected to each of the trough portions, or the wide flat band is arranged on the front side of the characteristic band and connected to each of the peak portions.

[0021] In some embodiments, multiple rows of second slit groups are arranged at intervals in the upper and lower directions on the wide flat belt, and each row of the second slit groups includes a plurality of second slits arranged at intervals along the length direction of the wide flat belt, each second slit is arranged horizontally, and the upper and lower adjacent second slits are arranged in an staggered manner.

[0022] According to a honeycomb heating element provided above, it is realized by the following technical solution: a honeycomb heating element, which includes a honeycomb body, which is formed by winding a metal strip as described above, and pores for gas to pass through are formed between adjacent winding circles, and the porosity of the upper end of the pore is greater than the porosity of the lower end of the pore.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] The metal strip material of the present invention is provided with a plurality of staggered first fire holes and second fire holes on the characteristic strip, and a first partition plate is provided at the lower end of the first fire hole to separate it into at least two small holes, and / or a second partition plate is provided at the lower end of the second fire hole to separate it into at least two small holes. It has a simple structure and is easy to manufacture, has a high porosity, can reduce the probability of tempering, improve the thermal intensity of the fire hole, is conducive to the full combustion of gas under high load conditions, and makes the honeycomb heating element heat up faster and the heat exchange more sufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an exploded view of the first metal strip in Example 1 of the present utility model;

[0026] Figure 2 This is a bottom view of the first metal strip in Example 1 of the present utility model;

[0027] Figure 3 This is a schematic diagram of the honeycomb coiling process in Example 1 of the present invention;

[0028] Figure 4 This is a schematic structural diagram of the honeycomb body in Example 1 of the present utility model;

[0029] Figure 5 This is a partial bottom view of the second metal strip in Example 1 of the present utility model;

[0030] Figure 6 This is a partial bottom view of the third metal strip in Example 1 of the present utility model;

[0031] Figure 7 This is a partial bottom view of the fourth metal strip in Example 1 of the present utility model;

[0032] Figure 8 This is a partial bottom view of the fifth metal strip in Example 1 of the present utility model;

[0033] Figure 9 This is a schematic structural diagram of the metal strip in Example 2 of the present utility model;

[0034] Figure 10 This is a schematic structural diagram of the metal strip in Example 3 of the present utility model;

[0035] Figure 11 This is a schematic structural diagram of the metal strip in Example 4 of the present utility model;

[0036] Figure 12 This is a bottom view of the metal strip in Example 4 of the present utility model;

[0037] Figure 13 This is a schematic diagram of the honeycomb coiling process in Example 4 of the present invention;

[0038] Figure 14 This is a schematic structural diagram of the honeycomb body in Example 4 of the present utility model;

[0039] Figure 15 This is an exploded view of the metal strip in Example 5 of the present utility model;

[0040] Figure 16 It is a structural schematic diagram of the metal strip in Example 5 of the present utility model.

[0041] In the figure: 1-characteristic band, 101-flat section, 102-corrugated section, 11-peak portion, 12-trough portion, 13-first fire hole, 131-small hole, 132-micropore, 14-second fire hole, 15-first gap; 21-first spacer, 211-first hollow protrusion, 22-second spacer, 23-third spacer, 231-second hollow protrusion, 24-fourth spacer; 3-wide flat band, 31-second gap; 4-honeycomb body, 41-center through hole. DETAILED DESCRIPTION

[0042] The following examples illustrate the present invention, but the present invention is not limited by these examples. Modifications to the specific embodiments of the present invention or equivalent replacements of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed in the present invention.

[0043] Example 1

[0044] This embodiment provides a honeycomb heating element, comprising a honeycomb body 4 having a central through-hole 41, formed by coiling a metal strip. Of course, the honeycomb heating element may also include an inner retaining ring and / or an outer retaining ring. The inner retaining ring is disposed within the central through-hole of the honeycomb body 4 and connected to the radially inner side of the honeycomb body 4, while the outer retaining ring is sleeved outside the honeycomb body 4 and connected to the radially outer side of the honeycomb body 4.

[0045] The metal strip includes a characteristic strip 1 and a barrier structure, wherein the characteristic strip 1 is preferably a corrugated strip, and of course it can also be a semi-hexagonal corrugated strip, a rectangular strip or various serrated strips. The characteristic strip 1 has a plurality of alternatingly arranged and oppositely oriented crests 11 and troughs 12, a first fire hole 13 is formed between adjacent crests 11, and a second fire hole 14 is formed between adjacent troughs 12.

[0046] The barrier structure is integrally formed with the characteristic strip 1 and includes a vertically arranged first barrier piece 21 and / or second barrier piece 22. A first barrier piece 21 is positioned below each first fire hole 13. Its opposite ends are connected to the two adjacent peaks 11 or troughs 12, respectively. The first barrier piece 21 divides the lower end of each first fire hole 13 into at least two small holes 131, thereby ensuring that the porosity at the upper end of each first fire hole 13 in the metal strip is higher than that at the lower end. A second barrier piece 22 is positioned below each second fire hole 14. Its opposite ends are connected to the two adjacent troughs 12 or two adjacent peaks 11, respectively. The second barrier piece 22 divides the lower end of each second fire hole 14 into at least two small holes 131, thereby ensuring that the porosity at the upper end of each second fire hole 14 in the metal strip is higher than that at the lower end.

[0047] When the characteristic strip 1 provided with the first baffle 21 and / or the second baffle 22 is coiled to form a honeycomb body 4, the honeycomb body 4 has a central through hole 41, and pores for gas to pass through are formed between adjacent coils. Since the lower end of each first fire hole 13 of the characteristic strip 1 is provided with the first baffle 21 for dividing the first fire hole 13 into at least two small holes 131, and / or the lower end of each second fire hole 14 of the characteristic strip 1 is provided with the second baffle for dividing the second fire hole 14 into at least two small holes, the porosity of the upper end of the honeycomb body 4 is greater than that of the lower end of the pores. Compared with ZL20071002811 3.2 discloses a honeycomb heating element. While ensuring anti-backfire performance, the overall porosity of the honeycomb is higher, which is more conducive to the introduction of air (compared with the solution of adding a mesh body, a fiber body or a metal mesh at the bottom of the honeycomb body), which is conducive to the complete combustion of the gas under high load conditions, so that the honeycomb body heats up faster and the heat exchange is more sufficient; secondly, compared with a simple corrugated belt, the first spacer 21 and / or the second spacer 22 on the characteristic belt 1 prevent the trough portion 12 on each coil from being concave with the peak portion 11 of the adjacent coil to a certain extent, thereby forming more stable pores between the coils.

[0048] Specifically, the first baffle 21 is formed by partially punching or rolling the lower end of the trough portion 12 forward, and the upper and lower outer edges of the first baffle 21 are cut and separated from the trough portion 12 to form an opening for the passage of gas. This facilitates rapid processing and manufacturing while making the porosity of the lower end of the first fire hole 13 lower than that of the upper end, thereby reducing the probability of backfire and reducing the heat from the high-temperature combustion zone on the upper side of the honeycomb body 4 to the lower side of the honeycomb body 4) to block the combustion flame from moving toward the lower side of the honeycomb body, thereby improving the anti-backfire performance of the honeycomb body. The second baffle 22 is formed by partially punching or rolling the lower end of the peak portion 11 backward, and the upper and lower outer edges of the second baffle 22 are cut and separated from the peak portion 11 to form an opening for the passage of gas. This facilitates rapid processing and manufacturing while making the porosity of the lower end of the second fire hole 14 lower than that of the upper end, thereby reducing the probability of backfire and reducing the heat conduction from the high-temperature combustion zone on the upper side of the honeycomb body 4 to the lower side of the honeycomb body 4) to block the combustion flame from moving to the lower side of the honeycomb body, thereby improving the anti-backfire performance of the honeycomb body.

[0049] Specifically, adjacent first barrier pieces 21 may be located on the same vertical plane or on different vertical planes. Adjacent second barrier pieces 22 may be located on the same vertical plane or on different vertical planes. Each second barrier piece 22 may be located on the same vertical plane as the adjacent first barrier piece 21 or on different vertical planes.

[0050] The specific structure of the metal strip includes but is not limited to any of the following:

[0051] refer to Figure 1-4 In the first type, the metal strip includes a characteristic strip 1 and a barrier structure. The characteristic strip 1 is preferably a corrugated strip having a plurality of alternating, oppositely oriented peaks 11 and troughs 12. First flame holes 13 are formed between adjacent peaks 11, and second flame holes 14 are formed between adjacent troughs 12. The barrier structure includes a vertically arranged second barrier piece 22 and a vertically arranged third barrier piece 23. A second barrier piece 22 is provided at the lower end of each second flame hole 14. The opposite ends of the second barrier piece 22 are integrally connected to the characteristic strip 1. The second barrier piece 22 separates the lower end of the second flame hole 14 into at least two small holes 131. A third barrier piece 23 is provided in the middle of each first flame hole 13. The opposite ends of the third barrier piece 23 are integrally connected to the characteristic strip 1. The third barrier piece 23 separates the middle portion of the first flame hole 13 into at least two small holes 131.

[0052] Furthermore, the third barrier piece 23 is formed by punching forward from a portion of the middle portion of the trough 12. The upper and lower outer edges of the third barrier piece 23 are cut away from the trough 12 to form an opening. Adjacent second barrier pieces 22 are located on the same vertical plane, and adjacent third barrier pieces 23 are located on the same vertical plane. Each second barrier piece 22 and adjacent third barrier pieces 23 are located on the same vertical plane. Of course, the second barrier pieces 22 and third barrier pieces 23 can also be located on different vertical planes.

[0053] When the characteristic strip 1 provided with the second spacer sheet 22 and the third spacer sheet 23 is wound to form a honeycomb body 4, see Figure 3-4 A central through-hole 41 is formed at the center of the honeycomb body 4. Pores for gas flow are formed between adjacent coils. The porosity at the upper end of the pores is greater than that at the lower end. Because the second and third baffles 22 and 23 are located at the lower and middle portions of the characteristic band 1, respectively, the pores at the upper and lower ends of the honeycomb body 4 are more stable when the characteristic band 1 is coiled to form the honeycomb body 4.

[0054] refer to Figure 5 The second type differs from the first type of metal strip in that the barrier structure also includes a vertically arranged first barrier piece 21. A first barrier piece 21 is positioned below each first flame hole 13. Opposite ends of the first barrier piece 21 are integrally connected to the characteristic strip 1. The first barrier piece 21 divides the lower end of the first flame hole 13 into at least two small holes 131. Furthermore, adjacent first barrier pieces 21 are positioned on the same vertical plane, while each second barrier piece 22 is positioned on a different vertical plane from the adjacent first barrier piece 21 and the adjacent third barrier piece 23. Of course, the first barrier piece 21 and the third barrier piece 23 can also be designed to be positioned on the same vertical plane.

[0055] When the characteristic strip 1 provided with the first spacer piece 21, the second spacer piece 22 and the third spacer piece 23 is coiled to form a honeycomb body 4, the porosity at the lower end of the formed honeycomb body 4 is lower and the anti-tempering performance is better than the first type.

[0056] refer to Figure 6 The third type is different from the first or second metal strip material in that the barrier structure also includes a vertically arranged fourth barrier piece 24, and a fourth barrier piece 24 is provided in the middle of each second fire hole 14. The opposite ends of the fourth barrier piece 24 are respectively integrally connected with the characteristic strip 1, and the fourth barrier piece 24 separates the middle part of the first fire hole 13 into at least two small holes 131.

[0057] Furthermore, the fourth barrier piece 24 is formed by punching a portion of the middle portion of the corrugated portion 11 backwards, and the upper and lower outer edges of the fourth barrier piece 24 are cut away from the corrugated portion 11 to form an opening. Adjacent fourth barrier pieces 24 are located on the same vertical plane, while each second barrier piece 22 is located on a different vertical plane from the adjacent fourth barrier piece 24 and the adjacent third barrier piece 23. Of course, the second barrier pieces 22 and fourth barrier pieces 24 can also be designed to be located on the same vertical plane.

[0058] When the characteristic strip 1 provided with the second spacer piece 22 , the third spacer piece 23 and the fourth spacer piece 24 is coiled to form a honeycomb body 4 , the upper and lower ends of the pores of the formed honeycomb body 4 are more stable compared to the first or second type.

[0059] refer to Figure 7 The fourth type of metal strip differs from the first type in that each second spacer 22 is provided with a first hollow protrusion 211. The first hollow protrusion 211 is formed by partially stamping or rolling the second spacer 22 in the rearward / forward direction. The first hollow protrusion 211 divides one of the small holes 131 into at least two micropores 132, thereby lowering the porosity at the lower end of the honeycomb body 4. The third spacer 23 is provided with a second hollow protrusion 231. The second hollow protrusion 231 is formed by partially stamping or rolling the third spacer 23 in the rearward / forward direction. The second hollow protrusion 231 divides one of the small holes 131 into at least two micropores 132, thereby lowering the porosity in the central portion of the honeycomb body 4. In other embodiments, the first hollow protrusion 211 on the second spacer 22 or the second hollow protrusion 231 on the third spacer 23 may be omitted. Of course, a first hollow protrusion 211 may be added to the first spacer 21, in which case the first hollow protrusion 211 is formed by partially stamping or rolling the second spacer 22 outward, or a second hollow protrusion 231 may be provided on the fourth spacer 24, in which case the second hollow protrusion 231 is formed by partially stamping or rolling the fourth spacer 24 outward.

[0060] Furthermore, the upper and lower end surfaces of the first hollow protrusion 211 are respectively flush with the upper and lower end surfaces of the second baffle 22. A vent is formed on the side of the first hollow protrusion 211, which is connected to the adjacent first fire hole 13. The upper and lower ends of the first hollow protrusion 211 are open, so that the gas at the lower end of the first hollow protrusion 211 can flow into the first hollow protrusion 211 and then flow out from the top of the first hollow protrusion 211. Of course, the lower end surface of the first hollow protrusion 211 can also be designed to be higher than the lower end surface of the second baffle 22. In this case, the lower end of the first hollow protrusion 211 can be designed to be closed; the upper end surface of the first hollow protrusion 211 can also be designed to be lower than the upper end surface of the second baffle 22. In this case, the upper end of the first hollow protrusion 211 can be designed to be closed.

[0061] Furthermore, the upper and lower end surfaces of the second hollow protrusion 231 are respectively flush with the upper and lower end surfaces of the third baffle 23. A vent is formed on the side of the second hollow protrusion 231, which is connected to the adjacent second fire hole 14. The upper and lower ends of the second hollow protrusion 231 are open, so that the gas at the lower end of the second hollow protrusion 231 can flow into the second hollow protrusion 231 and then flow out from the top of the second hollow protrusion 231. Of course, the lower end surface of the second hollow protrusion 231 can also be designed to be higher than the lower end surface of the third baffle 23, in which case the lower end of the second hollow protrusion 231 can be designed to be closed; the upper end surface of the second hollow protrusion 231 can also be designed to be lower than the upper end surface of the third baffle 23, in which case the upper end of the second hollow protrusion 231 can be designed to be closed.

[0062] refer to Figure 8 , the fifth type, which differs from the fourth type of metal strip in that the lower end face of the first hollow protrusion 211 is designed to be higher than the lower end face of the second partition piece 22, the upper end face of the first hollow protrusion 211 can be lower than or flush with the lower end face of the second partition piece 22, and the upper and lower ends of the first hollow protrusion 211 are open; the lower end face of the second hollow protrusion 231 is higher than the lower end face of the third partition piece 23, the upper end face of the second hollow protrusion 231 can be lower than or flush with the lower end face of the third partition piece 23, and the upper and lower ends of the second hollow protrusion 231 are open.

[0063] The sixth type of metal strip differs from the first type in that the characteristic strip 1 is provided with at least two rows of first slit groups spaced vertically above the baffle structure, and the wide flat strip 3 is provided with at least three or four rows of second slit groups spaced vertically. This first slit group increases thermal resistance, reducing heat transfer from the high-temperature combustion zone on the upper side of the honeycomb body 4 to the lower side, thereby blocking the combustion flame from migrating to the lower side and further improving the honeycomb's anti-flashback performance.

[0064] The adjacent crest portions 11 and trough portions 12 share a pair of sub-features. Each row of the first slit group includes a plurality of first slits 15 spaced apart along the length direction of the feature band 1. Each first slit 15 is arranged transversely and passes through at least one pair of sub-features transversely, and the upper and lower adjacent first slits 15 are arranged in an alternating manner.

[0065] Example 2

[0066] refer to Figure 9 This embodiment differs from Example 1 in the specific structure of characteristic band 1. Specifically, characteristic band 1 comprises a plurality of alternating planar segments 101 and corrugated segments 102. Corrugated segments 102 have a plurality of alternating peaks 11 and troughs 12. First flame holes 13 are formed between adjacent peaks 11, and second flame holes 14 are formed between adjacent troughs 12. A third barrier 23 is integrally formed in the center of each first flame hole 13, dividing it into two smaller holes 131. A second barrier 22 is integrally formed at the lower end of each second flame hole 14, dividing it into two smaller holes.

[0067] When the characteristic strip 1, equipped with the second and third spacer sheets 22 and 23, is coiled to form a honeycomb body 4, pores for gas flow are formed between adjacent coils. The flat sections 101 and the corrugated sections 102 are positioned on different coils, so that one coil of the honeycomb body 4 comprises flat sections 101 and another comprises corrugated sections 102, alternating radially. This results in a honeycomb body 4 with high porosity, resistance to tempering, high thermal strength of the fire holes, and ease of fabrication. Furthermore, the flat sections 101 separate radially adjacent corrugated sections 102, preventing concavity in the troughs 12 and peaks 11 of each coil. This results in more stable pores between the coils, with the porosity at the top of the pores being higher than that at the bottom.

[0068] Example 3

[0069] refer to Figure 10 This embodiment differs from Example 2 in that at least two rows of first slit groups are provided on each corrugated segment 102, spaced vertically above the baffle structure, and at least three or four rows of second slit groups are spaced vertically on each planar segment 101. Providing the first and second slit groups on the characteristic band 1 increases thermal resistance, reduces heat transfer from the high-temperature combustion zone on the upper side of the honeycomb body 4 to the lower side, and thereby blocks the combustion flame from migrating to the lower side, further enhancing the anti-flashback performance of the honeycomb body. In other embodiments, all first slit groups on each corrugated segment 102 or all second slit groups on each planar segment 101 may be omitted.

[0070] The adjacent crest portions 11 and trough portions 12 share a pair of sub-features. Each row of first slit groups includes a plurality of first slits 15 spaced apart along the length direction of the corrugated section 102. Each first slit 15 is arranged transversely and passes through at least one pair of sub-features transversely, and the upper and lower adjacent first slits 15 are arranged in an alternating manner.

[0071] Each row of the second slit groups includes a plurality of second slits 31 spaced apart along the length direction of the plane segment 101 . Each second slit 31 is arranged transversely, and upper and lower adjacent second slits 31 are arranged in a staggered manner.

[0072] Example 4

[0073] refer to Figure 11-14 The difference between this embodiment and embodiment 1 is that the metal strip also includes a wide flat strip 3, and a wide flat strip 3 welded to each crest portion 11 is provided on the front of the characteristic strip 1, or a wide flat strip 3 welded to each trough portion 12 is provided on the back of the characteristic strip 1.

[0074] In this embodiment, the wide flat belt 3 is welded and fixed to the back of the characteristic belt 1 as an example. After the barrier structure is processed and manufactured on the characteristic belt 1, the wide flat belt 3 is welded to each trough portion 12 on the characteristic belt 1, so that the characteristic belt 1 with the barrier structure and the wide flat belt 3 are connected as a whole. Figure 11-12 Then the two belts are wound together to form a honeycomb body 4, see Figure 13-14 A central through hole 41 is formed at the center of the honeycomb body 4, and gaps for gas flow are formed between adjacent coils. This ensures high porosity, low tempering, and high thermal strength of the fire holes. Furthermore, the troughs 12 and peaks 11 of each coil are prevented from collapsing, thereby forming more stable gaps between the coils. The porosity at the top of these gaps is higher than that at the bottom.

[0075] Example 5

[0076] refer to Figure 15-16 This embodiment differs from Example 4 in that at least two rows of first slit groups are provided on the characteristic band 1, spaced vertically above the baffle structure, and at least three or four rows of second slit groups are spaced vertically on the wide flat band 3. This arrangement, through the first slit groups on the characteristic band 1 and the second slit groups on the wide flat band 3, increases thermal resistance, reduces heat transfer from the high-temperature combustion zone on the upper side of the honeycomb body 4 to the lower side of the honeycomb body 4, and thereby blocks the combustion flame from migrating toward the lower side of the honeycomb body, further enhancing the anti-flashback performance of the honeycomb body. In other embodiments, the entire first slit group on the characteristic band 1 or the entire second slit group on the wide flat band 3 may be omitted.

[0077] Adjacent peaks 11 and troughs 12 share a pair of sub-features. Each row of first slit groups includes a plurality of first slits 15 spaced apart along the length of the feature strip 1. Each first slit 15 is arranged transversely and extends transversely through at least one sub-feature, with upper and lower adjacent first slits 15 arranged in a staggered arrangement. Each row of second slit groups includes a plurality of second slits 31 spaced apart along the length of the planar segment 101. Each second slit 31 is arranged transversely, with upper and lower adjacent second slits 31 arranged in a staggered arrangement.

[0078] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A metal strip, characterized in that: include: The characteristic band (1) has a plurality of wave crests (11) and wave troughs (12) arranged alternately, a first fire hole (13) is formed between adjacent wave crests (11), and a second fire hole (14) is formed between adjacent wave troughs (12); A barrier structure, comprising a first barrier sheet (21) and / or a second barrier sheet (22), wherein the first barrier sheet (21) is provided at the lower end of each of the first fire holes (13), and the first barrier sheet (21) divides the lower end of the first fire hole (13) into at least two small holes (131); A second baffle plate (22) is provided at the lower end of each of the second fire holes (14), and the second baffle plate (22) divides the lower end of the second fire hole (14) into at least two small holes (131).

2. A metal strip according to claim 1, characterized in that: The first baffle plate (21) is formed by partially punching or rolling the lower end of the trough portion (12) forward, and the upper and lower outer edges of the first baffle plate (21) are cut and separated from the trough portion (12) to form an opening; The second baffle plate (22) is formed by partially punching or rolling the lower end of the crest portion (11) backwards, and the upper and lower outer edges of the second baffle plate (22) are cut and separated from the crest portion (11) to form an opening.

3. A metal strip according to claim 1 or 2, characterized in that: Adjacent first barrier sheets (21) are located on the same or different vertical planes, and adjacent second barrier sheets (22) are located on the same or different vertical planes.

4. A metal strip according to claim 1, characterized in that: A first hollow protrusion (211) is provided on the first barrier sheet (21) and / or the second barrier sheet (22), and the first hollow protrusion (211) divides one of the small holes (131) into at least two micro holes.

5. A metal strip according to claim 4, characterized in that: A vent is formed on the side of the first hollow protrusion (211), the upper end of the first hollow protrusion (211) is closed or open, and the lower end of the first hollow protrusion (211) is closed or open.

6. A metal strip according to claim 1, characterized in that: The barrier structure further comprises a third barrier sheet (23) and / or a fourth barrier sheet (24) arranged vertically, wherein a third barrier sheet (23) is provided in the middle of each first fire hole (13), and the third barrier sheet (23) divides the middle of the first fire hole (13) into at least two small holes (131); A fourth baffle plate (24) is provided in the middle of each of the second fire holes (14), and the fourth baffle plate (24) divides the middle of the second fire hole (14) into at least two small holes (131).

7. A metal strip according to claim 6, characterized in that: The third baffle plate (23) is formed by partially punching the middle portion of the trough portion (12) forward, and the upper and lower outer edges of the third baffle plate (23) are cut and separated from the trough portion (12) to form an opening; The fourth baffle plate (24) is formed by partially punching the middle portion of the crest portion (11) backwards, and the upper and lower outer edges of the fourth baffle plate (24) are cut and separated from the crest portion (11) to form an opening.

8. A metal strip according to claim 6 or 7, characterized in that: The adjacent third barrier pieces (23) are located on the same or different vertical planes, and the third barrier piece (23) and the adjacent first barrier piece (21) / the second barrier piece (22) are located on the same or different vertical planes; The adjacent fourth barrier pieces (24) are located on the same or different vertical planes, and the fourth barrier piece (24) and the adjacent second barrier piece (22) / the first barrier piece (21) are located on the same or different vertical planes.

9. A metal strip according to claim 6, characterized in that: A second hollow protrusion (231) is provided on the third barrier sheet (23) and / or the fourth barrier sheet (24), and the second hollow protrusion (231) divides one of the small holes (131) into at least two micro holes.

10. A metal strip according to claim 9, characterized in that: A vent is provided on the side of the second hollow protrusion (231); the upper end of the second hollow protrusion (231) is closed or open; and the lower end of the second hollow protrusion (231) is closed or open.

11. A metal strip according to claim 10, characterized in that: The characteristic band (1) is provided with a plurality of rows of first slit groups located above the barrier structure and spaced apart from each other in the upper and lower directions, each row of the first slit groups comprising a plurality of first slits (15) spaced apart from each other in the length direction of the characteristic band (1), each first slit (15) being arranged transversely, and the first slits (15) adjacent to each other in the upper and lower directions being arranged in a staggered manner.

12. A metal strip according to any one of claims 1 or 4 or 6 or 9-11, characterized in that: The characteristic band (1) comprises a plurality of alternately arranged flat sections (101) and corrugated sections (102), wherein the corrugated sections (102) have a plurality of alternately arranged wave crests (11) and wave troughs (12).

13. A metal strip according to claim 12, characterized in that: A plurality of rows of second slit groups are arranged at intervals in the upper and lower directions on the plane section (101), each row of the second slit groups comprises a plurality of second slits (31) arranged at intervals along the length direction of the plane section (101), each second slit (31) is arranged transversely, and upper and lower adjacent second slits (31) are arranged in a staggered manner.

14. A metal strip according to any one of claims 1 or 4 or 6 or 9-11, characterized in that: It also includes a wide flat band (3), which is arranged on the back side of the characteristic band (1) and connected to each of the trough portions (12), or the wide flat band (3) is arranged on the front side of the characteristic band (1) and connected to each of the peak portions (11).

15. A metal strip according to claim 14, characterized in that: The wide flat belt (3) is provided with a plurality of rows of second slit groups spaced apart from each other in the upper and lower directions, each row of the second slit groups comprising a plurality of second slits (31) spaced apart from each other in the length direction of the wide flat belt (3), each second slit (31) being arranged transversely, and the second slits (31) adjacent to each other in the upper and lower directions being arranged in a staggered manner.

16. A honeycomb heating element, characterized in that: It comprises a honeycomb body (4), which is formed by winding a metal strip as described in any one of claims 1 to 15, with pores for gas to pass through formed between adjacent windings, and the porosity of the upper end of the pore is greater than the porosity of the lower end of the pore.

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