Circulating constant temperature device of tunnel furnace

Abstract

The utility model belongs to the technical field of tunnel furnace bodies, and particularly relates to a tunnel furnace circulating constant temperature device which comprises a tunnel furnace body and a material conveying channel transversely penetrating through the tunnel furnace body. A plurality of air spraying pipes communicating with the hollow structure are arranged on the opposite sides of the two air guiding plates in a rectangular array mode, one end of each air spraying pipe faces the material conveying channel, and a heat supply mechanism communicating with the two second air guiding plates and used for supplying heat is installed outside the tunnel furnace body; the two second air deflectors symmetrically distributed above and below the conveying channel are additionally arranged, hot air generated by the heat supply mechanism is directly sprayed to workpieces in the conveying channel through the air spraying pipes on the second air deflectors, so that a high-temperature environment is conveniently formed in the conveying channel, and a combustion chamber in the tunnel furnace does not need to be integrally heated.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel furnace bodies, and in particular relates to a circulating constant temperature device for a tunnel furnace. Background Art

[0002] The tunnel furnace body is a long furnace, usually composed of a furnace body, feeding and discharging devices, a combustion chamber, an exhaust gas treatment system, a thermal control system and auxiliary equipment.

[0003] The existing thermal control system is set in the combustion chamber. Due to the large space of the combustion chamber, the temperature in the combustion chamber rises slowly, and a large amount of energy is required to increase the temperature. In addition, the waste heat in the existing combustion chamber is directly discharged through the exhaust pipe, resulting in large heat loss and too low energy utilization. Utility Model Content

[0004] The utility model aims to provide a tunnel furnace circulating constant temperature device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tunnel furnace circulating constant temperature device, comprising: a tunnel furnace body and a material conveying channel that transversely penetrates the tunnel furnace body, second air guide plates with hollow structures are installed above and below the material conveying channel, and the opposite sides of the two air guide plates are arranged in a rectangular array with multiple air injection pipes connected to the hollow structure, one end of each of the air injection pipes faces the material conveying channel, and a heating mechanism connected to the two second air guide plates for heating is installed on the outside of the tunnel furnace body.

[0006] Preferably, a first air guide plate with a hollow structure is installed on the opposite side of the two second air guide plates, and the opposite side of the two first air guide plates has a plurality of collecting tubes connected to the hollow structure in a rectangular array, one end of the plurality of collecting tubes respectively passes through the second air guide plate on the same side and extends to one side of the material conveying channel, a circulation tube is connected between the two first air guide plates, and the other end of the circulation tube is connected to the air inlet end of the heating mechanism.

[0007] Preferably, the heating mechanism includes an air supply shell, an air outlet pipe and a heating box, one end of the air outlet pipe and one end of the circulation pipe are symmetrically arranged on the air supply shell, a fan blade is rotatably installed in the air supply shell, one end of the air outlet pipe and one end of the circulation pipe are both arranged in the tangential direction of the edge of the fan blade, one end of the air outlet pipe facing away from the air supply shell is respectively connected to two second air guide plates, and the heating box is arranged on the air outlet pipe.

[0008] Preferably, the interior of the heating box is further provided with a plurality of heating rods distributed in a rectangular array, and the plurality of heating rods are all perpendicular to the air flow direction. A temperature sensor for temperature detection is provided at one end of the air outlet duct close to the heating box, and the temperature sensor is arranged on the side of the heating box away from the air supply shell.

[0009] Preferably, a driving member for rotationally driving the fan blades is also installed on the top of the air supply housing, and the driving member is a motor.

[0010] Preferably, coaxial openings are penetrated on both symmetrical sides of the tunnel furnace body, the material conveying channel is formed in the two openings, and a plurality of rotatable conveying rollers are provided at equal distances on the axis line between the two openings.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] (1) The utility model adds two second air guide plates symmetrically distributed above and below the material conveying channel. The hot air generated by the heating mechanism is directly sprayed onto the workpiece in the material conveying channel through the injection pipes on the second air guide plates, thereby forming a high-temperature environment in the conveying channel without heating the combustion chamber in the tunnel furnace as a whole.

[0013] (2) The utility model adds two symmetrically distributed first air guide plates, and the waste heat can be directly collected in the material conveying channel through the collection pipe on the second air guide plate, and then reintroduced into the heating mechanism through the circulation pipe, thereby realizing the waste heat circulation constant temperature of the tunnel furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a side view of the first air guide plate, the second air guide plate, the air outlet pipe and the circulation pipe of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the second air guide plate, the collecting pipe and the air injection pipe of the utility model;

[0017] Figure 4 A three-dimensional diagram of the first air guide plate and the second air guide plate of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the heating mechanism of the utility model;

[0019] Figure 6 This is a schematic diagram of the structure of the air outlet pipe, circulation pipe, fan blades and air supply housing of the utility model;

[0020] In the figure: 1. Motor; 2. Air supply housing; 3. Heating box; 4. Air outlet pipe; 5. Tunnel furnace body; 6. Opening; 7. Conveying roller; 8. First air guide plate; 9. Collecting pipe; 10. Second air guide plate; 11. Jet pipe; 12. Circulation pipe; 13. Temperature sensor; 14. Heating rod; 15. Fan blade. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] refer to Figure 1 As shown, the utility model provides a tunnel furnace circulating constant temperature device, comprising: a tunnel furnace body 5 and a material conveying channel that transversely penetrates the tunnel furnace body 5, second air guide plates 10 with hollow structures are installed above and below the material conveying channel, and the opposite sides of the two air guide plates are arranged in a rectangular array with multiple air injection pipes 11 connected to the hollow structure, and one end of each air injection pipe 11 faces the material conveying channel, and a heating mechanism connected to the two second air guide plates 10 for heating is installed on the outside of the tunnel furnace body 5.

[0023] Combination Figure 1 As shown, coaxial openings 6 are penetrated on both symmetrical sides of the tunnel furnace body 5 , a material conveying channel is formed in the two openings 6 , and a plurality of rotatable conveying rollers 7 are provided at equal distances on the axis line between the two openings 6 .

[0024] As mentioned above, when using the tunnel furnace body 5, the second air guide plate 10, the feed channel, the jet pipe 11 and the heating mechanism provided by the utility model, the feed channel is formed between the two openings 6 and the multiple conveying rollers 7 on the tunnel furnace 5 body. When the heating mechanism is started, the heated hot air is directly transported to the feed channel through the second air guide plate 10 and the multiple jet pipes 11, so that the workpiece is transported through the feed channel with hot air to achieve drying of the workpiece. Through the above arrangement, there is no need to heat the space inside the tunnel furnace body 5 as a whole, thereby reducing the heating power of the equipment. At the same time, multiple collecting pipes 9 are used to facilitate the direct spraying of hot air on the workpiece, thereby improving the efficiency of hot air drying the workpiece.

[0025] In the present utility model, combined with Figure 1-4As shown, in this embodiment, the two second air guide plates 10 are each installed with a first air guide plate 8 with a hollow structure on the opposite side, and the two first air guide plates 8 have a plurality of collecting tubes 9 connected to the hollow structure in a rectangular array on the opposite side, and one end of the plurality of collecting tubes 9 respectively passes through the second air guide plate 10 on the same side and extends to one side of the material conveying channel, and a circulation tube 12 is connected between the two first air guide plates 8, and the other end of the circulation tube 12 is connected to the air inlet end of the heating mechanism.

[0026] As mentioned above, when using the first air guide plate 8 provided by the utility model, the first air guide plate 8 is connected to the heating mechanism through the circulation pipe 12. When the heating mechanism is started, the waste heat in the feed channel enters the first air guide plate 8 through the collecting pipe 9, and enters the heating mechanism again through the circulation pipe 12, thereby realizing the recycling of waste heat of the equipment. The sum of the cross-sections of multiple collecting pipes 9 is greater than the cross-section of the circulation pipe 12.

[0027] In the present utility model, combined with Figure 5 As shown, the heating mechanism of this embodiment includes an air supply shell 2, an air outlet pipe 4 and a heating box 3. One end of the air outlet pipe 4 and one end of the circulation pipe 12 are symmetrically arranged on the air supply shell 2. A fan blade 15 is rotatably installed in the air supply shell 2. One end of the air outlet pipe 4 and one end of the circulation pipe 12 are both arranged in the tangential direction of the edge position of the fan blade 15. One end of the air outlet pipe 4 facing away from the air supply shell 2 is respectively connected to two second air guide plates 10, and the heating box 3 is arranged on the air outlet pipe 4.

[0028] As mentioned above, when using the heating mechanism provided by the utility model, the air supply shell 2 in the heating mechanism provides an installation position for the fan blades 15. When the fan blades 15 rotate, it is convenient for the external air to enter the air supply shell 2 through the circulation pipe 12, and be discharged to the outside through the air outlet pipe 4 through the fan blades 15. During this process, the gas will pass through the heating box 3, and the heating box 3 will heat the passing gas, so that the equipment can provide hot air in the feeding channel, which is convenient for drying the workpiece.

[0029] Further, in order to heat the gas passing through the heating box 3, refer to Figure 5 As shown, the interior of the heating box 3 is also provided with a plurality of heating rods 14 distributed in a rectangular array, and the plurality of heating rods 14 are perpendicular to the air flow direction. A temperature sensor 13 for temperature detection is provided at one end of the air outlet duct 4 close to the heating box 3, and the temperature sensor 13 is arranged on the side of the heating box 3 away from the air supply housing 2. The gas passing through the heating box 3 is heated by the heating rods 14, and the temperature of the heated gas is detected by the temperature sensor 13. When the temperature is greater than the threshold, the heating rods 14 reduce the heating power, and when the temperature is less than the threshold, the heating rods 14 increase the heating power.

[0030] Further, in order to facilitate driving the fan blades 15 to rotate, refer to Figure 5-6 As shown, a driving member for rotating the fan blades 15 is also installed on the top of the air supply housing 2, and the driving member is a motor 1. The motor 1 can drive the fan blades 15 to rotate in the air supply housing 2. When the fan blades 15 rotate, external gas enters the air supply housing 2 through the circulation pipe 12, and is discharged to the outside through the fan blades 15 and the air outlet pipe.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tunnel furnace circulating constant temperature device, characterized in that: include: A tunnel furnace body (5) and a material conveying channel transversely passing through the tunnel furnace body (5), second air guide plates (10) with hollow structures are installed above and below the material conveying channel, and opposite sides of the two air guide plates are provided with a plurality of air injection pipes (11) in a rectangular array connected to the hollow structure, one end of each of the air injection pipes (11) faces the material conveying channel, and a heating mechanism connected to the two second air guide plates (10) for supplying heat is installed outside the tunnel furnace body (5).

2. A tunnel furnace circulating constant temperature device according to claim 1, characterized in that: A first air guide plate (8) with a hollow structure is installed on the opposite side of the two second air guide plates (10), and a plurality of collecting tubes (9) connected to the hollow structure are arranged in a rectangular array on the opposite side of the two first air guide plates (8), one end of each of the plurality of collecting tubes (9) respectively passes through the second air guide plate (10) on the same side and extends to one side of the material conveying channel, a circulation tube (12) is connected between the two first air guide plates (8), and the other end of the circulation tube (12) is connected to the air inlet end of the heating mechanism.

3. A tunnel furnace circulating constant temperature device according to claim 2, characterized in that: The heating mechanism comprises an air supply housing (2), an air outlet pipe (4) and a heating box (3); one end of the air outlet pipe (4) and one end of the circulation pipe (12) are symmetrically arranged on the air supply housing (2); a fan blade (15) is rotatably installed in the air supply housing (2); one end of the air outlet pipe (4) and one end of the circulation pipe (12) are both arranged in the tangential direction of the edge position of the fan blade (15); one end of the air outlet pipe (4) facing away from the air supply housing (2) is respectively connected to two second air guide plates (10); and the heating box (3) is arranged on the air outlet pipe (4).

4. A tunnel furnace circulating constant temperature device according to claim 3, characterized in that: The interior of the heating box (3) is further provided with a plurality of heating rods (14) distributed in a rectangular array, and the plurality of heating rods (14) are all perpendicular to the airflow direction; a temperature sensor (13) for temperature detection is provided at one end of the air outlet pipe (4) close to the heating box (3), and the temperature sensor (13) is arranged on a side of the heating box (3) away from the air supply housing (2).

5. The tunnel furnace circulating constant temperature device according to claim 3, characterized in that: A driving member for rotationally driving the fan blades (15) is also installed on the top of the air supply housing (2), and the driving member is a motor (1).

6. The tunnel furnace circulating constant temperature device according to claim 1, characterized in that: The tunnel furnace body (5) is symmetrically provided with coaxial openings (6) on both sides, the material conveying channel is formed in the two openings (6), and a plurality of rotatable conveying rollers (7) are provided at equal distances on the axis line between the two openings (6).

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