A heating furnace with a cold and hot air circulation damper device

Abstract

The present invention provides a heating furnace with a hot and cold air circulation damper device, comprising an on-site heating main unit, a heating chamber fixedly installed on the inner wall of the on-site heating main unit, a hot air box fixed at the bottom of the on-site heating main unit, a plurality of nozzles arranged at the bottom of the hot air box, return side pipes opened on both sides of the bottom of the hot air box, a return channel connected to the return side pipe inside the hot air box, and a plurality of smoke exhaust ports arranged at the top of the on-site heating main unit; the return middle pipe is opened at the center of the hot air box, the heat exhaust bin is arranged between the air outlet of the heating chamber and the air inlet of the hot air box, and the three are connected. The present invention sets a return middle pipe with a spacing distribution at the center of the bottom end of the hot air box, so that the overflow generated in the middle of the hot air box does not need to travel a long distance to enter the return side pipes on both sides, but can quickly enter the return air box to collect the overflowing hot air into the hot air box as soon as possible, thereby reducing the heating efficiency of the road surface affected by the hot air overflow.

Description

Technical Field

[0001] The present invention relates to a special device used in the field of in-situ heat regeneration. More specifically, the present invention is to design a high-efficiency hot air furnace with cold and hot air mixing regulation and central uniform return air effect. Background Art

[0002] In-situ heat regeneration is an important means of low-carbon maintenance in the highway sector. Its construction process has made a huge contribution to resource recycling. At the same time, in-situ heat regeneration equipment should also have corresponding energy-saving and emission reduction effects to better achieve carbon reduction goals. Pavement heating is the most important process link in in-situ heat regeneration construction. Its heating effect and heating efficiency directly affect the subsequent construction efficiency. At present, there are many heating methods in China, namely combustion chamber infrared heating, microwave heating and hot air heating. These heating methods each have their own advantages and disadvantages. However, from the perspective of on-site construction environment and heating effect, hot air heating with comprehensive effects is the most suitable for the current domestic situation.

[0003] Although the overall performance of the existing hot air heating furnace can meet the construction requirements, its interior is simple and the layout is not very reasonable, which makes the hot air out of the heating chamber unevenly distributed and the hot air is not returned in time after heating, resulting in turbulence at the bottom of the hot air box, affecting the hot air heating effect. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to greatly improve the hot blast stove by adding some devices and changing some design structures.

[0005] In order to solve the above technical problems, the present invention includes:

[0006] The utility model relates to a heating furnace with a cold and hot air circulation regulating damper device.

[0007] It includes an in-situ heating main unit, a heating chamber fixedly installed on the inner wall of the in-situ heating main unit, a hot air box fixed at the bottom of the in-situ heating main unit, a plurality of nozzles arranged at the bottom of the hot air box, return side pipes opened on both sides of the bottom of the hot air box, a return channel connected to the return side pipe inside the hot air box, and a plurality of smoke exhaust ports arranged on the top of the in-situ heating main unit;

[0008] The reflux middle pipe is opened in the center of the hot air box, and several groups are arranged at intervals along the bottom long section of the reflux middle pipe. They have the same function as the reflux channel, and are both used for the reflux of hot air.

[0009] The return air box is fixed at the center of the upper end of the hot air box. The upper end of the return middle pipe and the upper ends of the two groups of return channels are centrally connected to the return air box.

[0010] The air distribution box is fixed on the upper part of the return air box, and the air distribution box is connected with the return air box, the smoke exhaust port and the heating chamber;

[0011] The heat exhaust chamber is arranged between the air outlet of the heating chamber and the air inlet of the hot air box, and the three are connected;

[0012] The hot and cold air regulating mechanism is installed at the bottom of the heat exhaust bin and is used to fully mix the return air and the hot air discharged from the heating chamber.

[0013] In the heating furnace, an air inlet filter plate is provided at the air inlet of the heating chamber, and the air inlet filter plate is connected to the air distribution box.

[0014] The heating furnace, wherein the hot and cold air adjustment mechanism includes a bottom bar, an inner ring body, an outer ring body, an inner bar and a bottom air trough, the inner ring body is installed inside the heat exhaust bin, the outer ring body is sleeved on the outside of the inner ring body, the bottom air trough is opened in the bent portion of the lower half of the outer ring body, the bottom bar is fixed to the lower part of the bent portion of the outer ring body, and several groups of inner bar are annularly fixed on the center part of the inner wall of the inner ring body.

[0015] The heating furnace is described, wherein the inner wall of the inner ring body is provided with openings distributed in an annular manner and having the same number as the inner bar, and there is an angle between the inner bar and the inner ring body, and the connection part between the inner bar and the inner ring body is at the edge of the opening of the inner ring body.

[0016] In the heating furnace, the bottom of the inner ring body is provided with inwardly bent protrusions, and the bent protrusions are distributed in a ring shape.

[0017] The heating furnace, wherein the number of the annular protrusions is equal to the number of the bottom air troughs, and the annular protrusions are placed on the surface of the bottom bending portion of the outer ring body, and an angle is set at the connection between the bottom bar and the bottom of the outer ring body.

[0018] In the heating furnace, the maximum diameter of the inner ring body is smaller than the inner diameter of the outer ring body, and the inner ring body and the outer ring body are connected by a bracket.

[0019] In the heating furnace, the bottom bending portion of the outer ring body is further provided with an adjusting slot, and the lower end surface of the bottom bending protrusion of the inner ring body is fixed with a bolt passing through the adjusting slot.

[0020] The heating furnace is characterized in that a reinforced side plate is installed inside the reflux middle tube by bolts, a reinforced center plate is arranged between two groups of reinforced side plates, and a bypass plate installed by bolts is installed in the space between the reinforced side plate and the reinforced center plate.

[0021] In the heating furnace, several groups of flow-around plates adopt an arc-shaped plate structure and are distributed in a stepped manner.

[0022] The present invention provides a heating furnace with a hot and cold air circulation regulating damper device, which has a return middle pipe distributed at intervals at the center of the bottom end of the hot air box. The overflow generated in the middle of the hot air box does not need to travel a long distance to enter the return side pipes on both sides, but can quickly enter the return air box to collect the overflow hot air into the hot air box as soon as possible, thereby reducing the heating efficiency of the road surface caused by the overflow of hot air.

[0023] The hot and cold air regulating mechanism can generate vortex in the passing wind, so that the hot and cold air are better mixed, and the mixing effect of the hot and cold air is enhanced. The hot and cold air regulating mechanism can also adjust the size of the air outlet, which is convenient for adjustment according to the wind pressure at the burner position when the equipment is assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an appearance diagram of the present invention;

[0025] Figure 2 A bottom view of the present invention;

[0026] Figure 3 It is an internal front view of the present invention;

[0027] Figure 4 This is an internal diagram of the heat exhaust bin of the present invention;

[0028] Figure 5 This is a bottom view of the outer ring body of the present invention;

[0029] Figure 6 This is a diagram of the interior of the reflux tube of the present invention.

[0030] 1. In-situ heating main unit; 2. Smoke exhaust port; 3. Hot air box; 4. Nozzle; 5. Return center pipe; 6. Return channel; 7. Return side pipe; 8. Return air box; 9. Air distribution box; 10. Air inlet filter plate; 11. Heat exhaust bin; 12. Bottom stop bar; 13. Inner ring body; 14. Outer ring body; 15. Inner stop bar; 16. Bottom air trough; 17. Adjustment slide; 18. Reinforced side panels; 19. Reinforced center panel; 20. Orbital plate; 21. Heating chamber. DETAILED DESCRIPTION

[0031] The present invention provides a heating furnace with a cold and hot air circulation damper device. To make the objectives, technical solutions, and effects of the present invention more clear and explicit, the present invention is further described below in detail. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0032] The present invention provides a heating furnace with a cold and hot air circulation damper device, comprising a local heating main unit 1, a heating chamber 21 fixedly mounted on the inner wall of the local heating main unit 1, and a hot air box 3 fixed on the bottom of the local heating main unit 1. Figures 1-6As shown, there are several groups of nozzles 4 arranged at the bottom of the hot air box 3, return side pipes 7 opened on both sides of the bottom of the hot air box 3, return channels 6 connected to the return side pipes 7 inside the hot air box 3, and several groups of smoke exhaust ports 2 set at the top of the local heat heating main unit 1; the return middle pipe 5 is opened at the center of the hot air box 3, and several groups are set at intervals along the long cross-section of the bottom of the return middle pipe 5, and have the same function as the return channels 6, which is to return the hot air. The return air box 8 is fixed to the center of the upper end of the hot air box 3, and the upper end of the return middle pipe 5 and the upper ends of the two groups of return channels 6 are centrally connected to the return air box 8; the branch air box 9 is fixed to the upper part of the return air box 8, and the branch air box 9 is connected to the return air box 8, the smoke exhaust port 2 and the heating chamber 21. The return air box 8 will be subject to three groups of airflows, namely the airflow discharged from the return channels 6 on both sides of the hot air box 3 and the airflow introduced upward from the return middle pipe 5. After the return air box 8 concentrates the airflow, it passes through the fan on the top of the return air box 8. The air is discharged into the interior of the air distribution box 9. An air inlet filter plate 10 is provided at the air inlet of the heating chamber 21, and the air inlet filter plate 10 is connected to the air distribution box 9. The air distribution box 9 can discharge the airflow into the heating chamber 21 through the air inlet filter plate 10, and can also discharge the airflow directly to the connected smoke exhaust port 2 and be discharged from the device. A part of the airflow is used for the subsequent use of hot and cold air, thereby realizing the circulation of the airflow; the heat exhaust bin 11 is provided between the air outlet of the heating chamber 21 and the air inlet of the hot air box 3, and the three are connected;

[0033] The hot and cold air regulating mechanism is installed at the bottom of the heat exhaust bin 11, and is used to fully mix the return air and the hot air discharged from the heating chamber 21. The hot and cold air regulating mechanism includes a bottom bar 12, an inner ring body 13, an outer ring body 14, an inner bar 15 and a bottom air trough 16. The inner ring body 13 is installed inside the heat exhaust bin 11, and the outer ring body 14 is sleeved on the outside of the inner ring body 13. The bottom air trough 16 is opened at the bent portion of the lower half of the outer ring body 14. The bottom bar 12 is fixed to the lower part of the bent portion of the outer ring body 14. Several groups of inner bars 15 are annularly fixed to the center of the inner wall of the inner ring body 13; the inner wall of the inner ring body 13 is provided with openings distributed in an annular manner and the same number as the inner bars 15, and there is a sandwich between the inner bar 15 and the inner ring body 13. The bottom of the outer ring body 14 is provided with an angle, and the maximum diameter of the inner ring body 13 is smaller than the inner diameter of the outer ring body 14, and the inner ring body 13 and the outer ring body 14 are connected by a bracket. The bottom bending part of the outer ring body 14 is also provided with an adjusting slot 17, and the lower end surface of the bottom bending projection of the inner ring body 13 is fixed with a bolt passing through the adjusting slot 17. The heat exhaust bin 11 is divided into two parts, the upper part The hot and cold air regulating mechanism is placed between the upper and lower parts of the heat exhaust bin 11 as a whole, and the last part of the airflow discharged from the air distribution box 9 will flow into the gap between the inner ring body 13 and the outer ring body 14. The airflow directly passes through the opening on the surface of the inner ring body 13 and moves to the inside of the inner ring body 13. The airflow is divided into two parts here, one part moves toward the center of the inner ring body 13, and the other part moves downward through the bottom air groove 16. Under the blocking of the bottom bar 12 and the inner bar 15, the two parts of the airflow will form a vortex, so that the airflow from the gap between the outer ring body 14 and the inner ring body 13 will be mixed with the airflow discharged downward from the heating chamber 21 in a vortex shape. The outlet fan of the heating chamber 21 increases the speed of the air flow. After the hot air flow contacts the return air flow, it is transferred downward to the hot air box 3 and acts on the road surface at the filling nozzle 4. It is worth noting that the outer ring body 14 and the inner ring body 13 are not completely fixed. The bent portion at the bottom of the inner ring body 13 is inserted into the inner part of the adjusting slot 17 by bolts. The outer ring body 14 and the inner ring body 13 are combined. The bolts are moved inside the adjusting slot 17 to adjust the relative position of the inner ring body 13 and the outer ring body 14. In this way, the bent protrusion at the bottom of the inner ring body 13 will adjust the contact surface with the bottom air slot 16, thereby clearing the channel for the downward air flow. After the position adjustment of the inner ring body 13 and the outer ring body 14 is completed, they can be fixed with bolts.

[0034] The interior of the return middle pipe 5 is installed with reinforced side panels 18 by bolts, a reinforced center panel 19 is provided between the two groups, and a detour plate 20 installed by bolts is installed in the space between the reinforced side panels 18 and the reinforced center panel 19. Several groups of detour plates 20 adopt an arc-shaped plate structure and are distributed in a stepped manner. After being affected by wind, the detour plates 20 with an arc-shaped plate structure will direct the horizontal wind upward, thereby accelerating the flow rate of the airflow. Moreover, due to its stepped distribution, it will not affect the normal airflow movement inside the return middle pipe 5, and can increase the wind receiving area.

[0035] Of course, the reinforced side panels 18, the reinforced center panel 19 and the plurality of detour plates 20 can together form a spoiler structure. The two reinforced side panels 18 are located on both sides, the reinforced center panel 19 is arranged between the two reinforced side panels 18, and the plurality of detour plates 20 are staggered up and down on the spoiler structure. During use, the heating chamber in the hot air furnace is heated, and the detour plates 20 installed at the air inlet position of the heating chamber can guide the horizontally blowing wind upward. The staggered distribution of multiple groups of detour plates 20 can increase the air receiving area and enhance the spoiler effect.

[0036] Of course, the above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above-mentioned embodiments. It should be noted that all equivalent substitutions and obvious deformation forms made by any technician familiar with this field under the guidance of this specification fall within the substantive scope of this specification and should be protected by the present invention.

Claims

1. A heating furnace with a hot and cold air circulation damper device, comprising an in-situ heating main unit (1), a heating chamber (21) fixedly mounted on the inner wall of the in-situ heating main unit (1), a hot air box (3) fixed at the bottom of the in-situ heating main unit (1), a plurality of groups of nozzles (4) arranged at the bottom of the hot air box (3), return side pipes (7) opened on both sides of the bottom of the hot air box (3), a return channel (6) inside the hot air box (3) communicating with the return side pipe (7), and a plurality of groups of smoke exhaust ports (2) arranged at the top of the in-situ heating main unit (1); It is characterized in that The return middle pipe (5) is opened in the center of the hot air box (3), and a plurality of groups of return middle pipes (5) are arranged at intervals along the bottom long cross section of the return middle pipe (5). The return middle pipes (5) have the same function as the return channel (6), and are both used for the return of hot air. The return air box (8) is fixed to the center of the upper end of the hot air box (3), and the upper end of the return middle pipe (5) and the upper ends of the two groups of return channels (6) are centrally connected to the return air box (8); The air distribution box (9) is fixed to the upper part of the return air box (8), and the air distribution box (9) is connected to the return air box (8), the smoke exhaust port (2) and the heating chamber (21); The heat exhaust chamber (11) is arranged between the air outlet of the heating chamber (21) and the air inlet of the hot air box (3), and the three are in communication; A hot and cold air regulating mechanism is installed at the bottom of the heat exhaust chamber (11) and is used to fully mix the return air and the hot air discharged from the heating chamber (21); The hot and cold air regulating mechanism comprises a bottom stop bar (12), an inner ring body (13), an outer ring body (14), an inner stop bar (15) and a bottom air trough (16); the inner ring body (13) is installed inside the heat exhaust bin (11); the outer ring body (14) is sleeved on the outside of the inner ring body (13); the bottom air trough (16) is opened at the bent portion of the lower half of the outer ring body (14); the bottom stop bar (12) is fixed to the lower part of the bent portion of the outer ring body (14); and a plurality of groups of inner stop bars (15) are annularly fixed to the center of the inner wall of the inner ring body (13); The inner wall of the inner ring body (13) is provided with openings distributed in an annular manner and having the same number as the inner stop bar (15), and an angle is formed between the inner stop bar (15) and the inner ring body (13), and the connection portion between the inner stop bar (15) and the inner ring body (13) is located at the edge of the opening of the inner ring body (13); the bottom of the inner ring body (13) is provided with inwardly bent protrusions, and the bent protrusions are distributed in an annular manner; The number of the annular protrusions is equal to the number of the bottom air slots (16), and the annular protrusions are placed on the surface of the bottom bending portion of the outer ring body (14), and an angle is set at the connection between the bottom stop bar (12) and the bottom of the outer ring body (14); A portion of the air flow discharged from the air distribution box (9) will flow into the gap between the inner ring body (13) and the outer ring body (14); the air flow in the gap between the outer ring body (14) and the inner ring body (13) will mix and contact with the air flow discharged downward from the heating chamber (21) in a vortex shape.

2. A heating furnace with a cold and hot air circulation damper device according to claim 1, characterized in that: An air inlet filter plate (10) is provided at the air inlet of the heating chamber (21), and the air inlet filter plate (10) is connected to the air distribution box (9).

3. A heating furnace with a cold and hot air circulation damper device according to claim 1, characterized in that: The maximum diameter of the inner ring body (13) is smaller than the inner diameter of the outer ring body (14), and the inner ring body (13) and the outer ring body (14) are connected via a bracket.

4. A heating furnace with a cold and hot air circulation damper device according to claim 3, characterized in that: The bottom bending portion of the outer ring body (14) is further provided with an adjusting slot (17), and the lower end surface of the bottom bending protrusion of the inner ring body (13) is fixed with a bolt passing through the adjusting slot (17).

5. A heating furnace with a cold and hot air circulation damper device according to claim 1, characterized in that: A reinforced side plate (18) is installed inside the return middle pipe (5) by means of bolts, a reinforced center plate (19) is provided between the two sets of reinforced side plates (18), and a bypass plate (20) installed by means of bolts is installed in the space between the reinforced side plates (18) and the reinforced center plate (19).

6. A heating furnace with a cold and hot air circulation damper device according to claim 5, characterized in that: The plurality of groups of flow-around plates (20) adopt an arc-shaped plate structure and are distributed in a stepped manner.

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