Horizontal hot air circulation double-sided vertical jet flow continuous air flotation heat treatment furnace for strips

Abstract

The utility model relates to a horizontal hot air circulation double-sided vertical jet flow continuous air flotation heat treatment furnace for strips, and relates to the technical field of heat treatment furnaces. The hot air furnace comprises a furnace body, a strip conveying chamber allowing strips to penetrate through is arranged in the furnace body, heating chambers are arranged in the furnace body and located on the two sides of the strip conveying chamber respectively, the heating chambers are communicated with the strip conveying chamber, hot air conveying pieces are arranged in the heating chambers, and the hot air conveying pieces are used for conveying hot air into the strip conveying chamber; the strip heating device has the effect of optimizing the strip heating uniformity.

Description

Technical Field

[0001] The present application relates to the technical field of heat treatment furnaces, and in particular to a horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials. Background Art

[0002] Currently, the heat treatment of metal strip materials usually adopts a roller hearth type or walking beam type heating furnace. The furnace body is a hollow sealed structure. An air flow injection pipe and a roller hearth type structure or a walking beam type structure are provided inside the furnace body. The strip material is conveyed into the furnace body by using the roller hearth type structure or the walking beam type structure. When the strip material is inserted into the furnace body along the length direction of the heating furnace, hot air is injected onto the surface of the strip material through the air flow injection pipe, thereby realizing the heating of the strip material.

[0003] However, the relative position of the above-mentioned air flow injection pipe inside the furnace body is fixed, and it is generally installed on one side inside the furnace body. Due to its fixed position, it is easy to cause limitations in the flow direction of the air flow output from the air flow injection pipe and the position acting on the surface of the strip material, resulting in uneven temperature on the surface of the strip material, especially on the upper and lower surfaces of the strip material, and affecting the heating effect of the strip material. Utility Model Content

[0004] In order to optimize the double-sided heating effect of the strip material by the heat treatment furnace, the present application provides a horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials.

[0005] A horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials provided by the present application adopts the following technical solutions:

[0006] A horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials includes a furnace body. A strip material transmission chamber for the strip material to pass through is provided inside the furnace body. Heating chambers are respectively provided inside the furnace body and on both sides of the strip material transmission chamber. The heating chambers are communicated with the strip material transmission chamber, and a hot air conveying member is provided in the heating chamber for conveying hot air into the strip material transmission chamber.

[0007] By adopting the above technical solutions, heating chambers are respectively arranged on both sides of the strip material transmission chamber to convey hot air to the strip material in the strip material transmission chamber. It can be seen that the present application increases the contact area between the strip material and the hot air through the position and quantity of the heating chambers, thereby realizing double-sided heating of the strip material and improving the heating uniformity effect of the hot air on the strip material in the strip material transmission chamber.

[0008] Preferably, the hot air conveying member includes a fan and a heating element. The air outlet of the fan is communicated with the heating chamber. The heating element is arranged in the heating chamber for heating the air in the heating chamber. A partition plate is provided between the heating chamber and the strip material transmission chamber. Air outlet holes are penetrated through the side wall of the partition plate. The air outlet is communicated with the heating chamber and the strip material transmission chamber.

[0009] By adopting the above technical solution, air is conveyed into the heating chamber by a blower, and then the air in the heating chamber is heated by a heating element. The heated air will enter the strip transmission chamber through the air outlet holes.

[0010] Preferably, the air inlet of the blower is communicated with the strip transmission chamber.

[0011] By adopting the above technical solution, the blower recovers the hot air from the strip transmission chamber through the air inlet of the blower, and then pumps it back into the heating chamber for heating, and then outputs it to the strip transmission chamber through the air outlet holes, realizing the hot air circulation. On the one hand, this operation reheats the air in the strip transmission chamber based on its waste heat, improving the energy conservation and environmental protection effect. On the other hand, by using the pumping of the air inlet of the blower and the output of the air outlet holes, the air flow mobility in the strip transmission chamber is promoted, further improving the heat conduction efficiency and the temperature uniformity in the strip transmission chamber.

[0012] Preferably, the straight lines connected by the air outlet holes on each partition board are wavy.

[0013] By adopting the above technical solution, since the air outlet holes are distributed in a wavy shape, the projections of the aforementioned air outlet holes in the vertical direction are not on the same straight line, that is, the hot air output from the air outlet holes to the surface of the strip will not act on the surfaces of the strip in the same length direction. In this way, the heating uniformity of the surface in the width direction of the strip can be optimized.

[0014] Preferably, the projections of the air outlet holes on two oppositely arranged partition boards in the direction perpendicular to the surface of the strip have an overlapping part.

[0015] Preferably, a heat insulation layer is provided around the heating chamber, and the heat insulation layer is located between the heating chamber and the furnace body.

[0016] By adopting the above technical solution, the heat insulation layer is provided to keep the temperature in the heating chamber, reducing the heat dissipation to the outside of the furnace body, thereby improving the heating efficiency of the heating element for the heating chamber and optimizing the constant temperature effect of the heating chamber.

[0017] Preferably, two heating chambers located on both sides in the vertical direction of the strip transmission chamber belong to the same heating diversion cavity, and there are multiple heating diversion cavities corresponding to the length direction of the furnace body inside the furnace body.

[0018] By adopting the above technical solution, multiple heating diversion cavities are arranged in the length direction, so that when the strip is transmitted along the length direction of the furnace body inside the furnace body, it can be heated by the combined action of all the heating diversion cavities, and finally the heating uniformity of the strip can be optimized.

[0019] Preferably, the cross-section of the peripheral wall of the heating chamber and the cross-section of the partition board are both corrugated.

[0020] By adopting the above technical solution, the corrugated cross-section of the peripheral wall of the heating chamber increases the contact area between the heating chamber and the inner wall of the furnace body, as well as the contact area between the air inside the heating chamber and the inner wall of the heating chamber. The corrugated cross-section of the partition increases the contact area between the partition and the hot air. On the one hand, the corrugated cross-section strengthens the structural strength of the heating chamber and the partition, and on the other hand, the corrugated cross-section plays a role in guiding and equalizing the hot air, so that the hot air is more evenly distributed in the heating chamber and then evenly discharged from the heating chamber through the air outlet holes on the partition.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. Heating chambers are respectively arranged on both sides of the strip transmission chamber to convey hot air to the strip in the strip transmission chamber. It can be seen that the present application increases the contact area between the strip and the hot air through the position and quantity of the heating chambers, thereby realizing double-sided heating of the strip and improving the heating uniformity effect of the hot air on the strip in the strip transmission chamber;

[0023] 2. The fan recovers the hot air from the strip transmission chamber through the fan air inlet, and then pumps it back into the heating chamber for heating, and then outputs it to the strip transmission chamber through the air outlet holes, realizing hot air circulation. This operation, on the one hand, reheats the air in the strip transmission chamber based on the waste heat, improving the energy conservation and environmental protection effect. On the other hand, by using the pumping of the fan air inlet and the output of the air outlet holes, the air flow mobility in the strip transmission chamber is promoted, further improving the heat conduction efficiency and the temperature uniformity of the strip transmission chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strips disclosed in an embodiment of the present application.

[0025] Figure 2 is Figure 1 the sectional view taken along the line A-A in

[0026] Figure 3 is a schematic diagram for embodying the distribution structure of the air outlet holes on the partition in an embodiment of the present application.

[0027] Figure 4 is a schematic diagram for embodying the projection in the strip transmission chamber of the straight line connecting the air outlet holes on two partitions belonging to the same heating and guiding cavity in an embodiment of the present application.

[0028] Description of the reference numerals: 1, furnace body; 11, strip transmission chamber; 12, heating and guiding cavity; 121, heating chamber; 122, partition; 1221, air outlet hole; 123, hot air conveying member; 1231, fan; 13, heat insulation layer; 14, track. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following further describes the present application in detail with reference to the accompanying Figures 1-4 drawings.

[0030] An embodiment of the present application discloses a horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials. Referring to Figure 1 and Figure 2 , the horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials includes a furnace body 1. Inside the furnace body 1, a strip material transmission chamber 11 is provided along its length direction. The strip material is conveyed into the strip material transmission chamber 11 from one end port of the furnace body 1 and moves along the length direction of the strip material transmission chamber 11 until it is output from the other end port of the furnace body 1; in other embodiments, tracks 14 for supporting the strip material inside the furnace body 1 may be provided along the length direction of the inner wall of the furnace body 1, and the tracks 14 are located on both sides of the strip material transmission chamber 11. In addition, a plurality of heating and guiding chambers 12 are further provided along the length direction inside the furnace body 1, and the heating and guiding chambers 12 are used to heat the strip material in the strip material transmission chamber 11.

[0031] Referring to Figure 2 , Figure 3 and Figure 4 , specifically, each heating and guiding chamber 12 includes heating chambers 121 located on both sides of the strip material transmission chamber 11. A partition 122 is provided between the heating chambers 121 and the strip material transmission chamber 11. The heating chambers 121 are jointly enclosed by corrugated plates and the partition 122, that is, the cross-section of the heating chambers 121 is corrugated, and the cross-section of the partition 122 is also corrugated. Air outlet holes 1221 for communicating the heating chambers 121 with the strip material transmission chamber 11 are formed through the side walls of the partition 122. The line segments connected by the air outlet holes 1221 on each partition 122 are wavy, and the projections of the line segments connected by the air outlet holes 1221 on the two partitions 122 belonging to the same heating and guiding chamber 12 in the vertical direction are as shown in Figure 4 , that is, the two line segments have an overlapping part, that is, the projections of the air outlet holes 1221 on the two partitions 122 belonging to the same heating and guiding chamber 12 in the vertical direction have an overlapping part.

[0032] A hot air conveying member 123 is provided inside each heating chamber 121. The hot air conveying member 123 includes a fan 1231 and a heating member. In the embodiment of the present application, the fan 1231 may specifically be a cross-flow fan, and the fan 1231 is installed at the end of the corresponding heating chamber 121. The air inlet of the fan 1231 is communicated with the strip material transmission chamber 11, and the air outlet of the fan 1231 is communicated with the corresponding heating chamber 121. The heating member is inserted and installed in the heating chamber 121 along the direction perpendicular to the length direction of the furnace body 1, and the heating member may specifically be an electric heater or a natural gas burner; to reduce the heat dissipation in the heating chamber 121, a heat insulation layer 13 is provided outside the heating chamber 121, that is, between the outer peripheral wall of the heating chamber 121 and the inner wall of the furnace body 1.

[0033] The implementation principle of a horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials in an embodiment of the present application is as follows: The strip material is inserted into the furnace body 1 from the port of the furnace body 1. An external conveyor belt or a conveyor belt or other conveying structures can be arranged in the track 14 to convey the strip material. The air in the strip material transmission chamber 11 is extracted into the heating chamber 121 by the fan 1231, and the air in the heating chamber 121 is heated by the heating element, and the heated air is output into the strip material transmission chamber 11 through the air outlet holes 1221 to synchronously heat both sides of the strip material, and all the heating diversion chambers 12 arranged along the length direction of the furnace body 1 are used to jointly heat the strip material, optimizing the heating uniformity of the strip material.

[0034] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials, comprising a furnace body (1), characterized in that: Inside the furnace body (1), there is a strip transmission chamber (11) for the strip to pass through. Inside the furnace body (1) and on both sides of the strip transmission chamber (11), there are heating chambers (121) respectively. The heating chambers (121) are communicated with the strip transmission chamber (11), and there is a hot air conveying member (123) in the heating chambers (121) for conveying hot air into the strip transmission chamber (11).

2. The horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials according to claim 1, wherein: The hot air conveying member (123) includes a blower (1231) and a heating member. The air outlet of the blower (1231) is communicated with the heating chamber (121), and the heating member is arranged in the heating chamber (121) to heat the air in the heating chamber (121). There is a partition (122) between the heating chamber (121) and the strip transmission chamber (11), and air outlet holes (1221) are penetrated through the side wall of the partition (122). The air outlet is communicated with the heating chamber (121) and the strip transmission chamber (11).

3. The horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials according to claim 2, characterized in that: The air inlet of the blower (1231) is communicated with the strip transmission chamber (11).

4. The horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials according to claim 2, wherein: The straight line connected by the air outlet holes (1221) on each partition (122) is wavy.

5. The horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials according to claim 2, wherein: The projections of the air outlet holes (1221) on two oppositely arranged partitions (122) in the direction perpendicular to the strip surface have an overlapping part.

6. The horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials according to claim 1, wherein: A heat insulation layer (13) is provided around the heating chamber (121), and the heat insulation layer (13) is located between the heating chamber (121) and the furnace body (1).

7. The horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials according to claim 1, characterized in that: The two heating chambers (121) on both sides in the vertical direction of the strip transmission chamber (11) belong to the same heating diversion cavity (12), and there are multiple heating diversion cavities (12) corresponding to the length direction inside the furnace body (1).

8. The horizontal hot air circulation double-sided vertical jet continuous air-floating heat treatment furnace for strip materials according to claim 2, characterized in that: The cross-section of the peripheral wall of the heating chamber (121) and the cross-section of the partition (122) are both corrugated.

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