Hot blast stove for grain dryer

Abstract

The hot blast stove for the grain drying machine comprises a stove body, a grate is arranged in the stove body, a frame body is arranged on one side of the stove body, a rectangular plate is connected to one side of the frame body, the rectangular plate is connected with the grate, a moving groove is formed in the frame body, straight teeth are arranged on the two side walls of the moving groove, and two fixing blocks are installed on one side of the stove body. A rotating shaft is rotationally arranged between the two fixing blocks, and a half-tooth gear is matched with the rotating shaft and meshed with the straight teeth. In the continuous rotation process of the half-tooth gear, the grate moves up and down in a circulating and reciprocating mode, the grate generates shaking force to effectively remove coal ash, and therefore the ash deposition phenomenon in a hearth is reduced, the cleanliness and heat transfer efficiency of the hearth are guaranteed, the service life of a furnace body is prolonged, and the continuity and stability of drying operation are remarkably improved. And the frequency and difficulty of manual cleaning are reduced, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of grain drying equipment, in particular to a hot blast stove for a grain dryer. Background Art

[0002] In the grain drying industry, as a key equipment, the performance of the hot blast stove directly affects the drying efficiency and grain quality. Traditional hot blast stoves mostly adopt coal combustion heating method. Coal burns on the grate to generate heat, and then heats the air in the spiral tube to realize the grain drying process. However, in the existing technology, for the hot blast stove disclosed in the Chinese authorized utility model patent (publication number: CN209639259U) for a grain dryer, the coal ash naturally falls through the ash dropping holes of the grate, but this method often causes coal ash to remain on the grate and is difficult to completely remove. These residual coal ashes will not only affect the heat transfer efficiency in the furnace chamber, but also may cause problems such as furnace chamber blockage and uneven heat distribution, thereby affecting the grain drying effect and quality. And the staff needs to regularly clean the coal ash on the grate, which not only increases the labor intensity, but also may cause certain wear and damage to the equipment. Therefore, a hot blast stove for a grain dryer is proposed to overcome the above defects. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a hot blast stove for a grain dryer, which solves the problem that it is difficult for the coal ash on the grate to completely fall by making the grate move up and down cyclically through a semi-toothed gear.

[0004] The utility model is realized through the following technical solutions:

[0005] The utility model provides a hot blast stove for a grain dryer, which includes a furnace body. There is a grate arranged inside the furnace body. There is a frame body arranged on one side of the furnace body. One side of the frame body is connected with a rectangular plate, and the rectangular plate is connected with the grate. A moving groove is formed inside the frame body, and straight teeth are arranged on both side walls of the moving groove. Two fixing blocks are installed on one side of the furnace body, and a rotating shaft rotates between the two fixing blocks. A semi-toothed gear is fitted on the rotating shaft, and the semi-toothed gear meshes with the straight teeth.

[0006] A wedge block is installed inside the furnace body. The wedge block is located at the bottom of the grate. One side of the wedge block is connected with a guide plate, and a guide groove is formed at the top of the guide plate.

[0007] Preferably, a smoke outlet pipe penetrates through the top of the furnace body, and a spiral tube penetrates between the two side plates of the furnace body.

[0008] Preferably, limiting grooves are formed inside both side plates of the furnace body, and sliding rods are connected inside the two limiting grooves.

[0009] Preferably, sliders are installed on both sides of the grate, and two slide rods respectively penetrate through the corresponding sliders.

[0010] Preferably, a motor is installed on one side of the furnace body, and the output end of the motor is connected to one end of the rotating shaft.

[0011] Preferably, two sealing gaskets are installed on one side of the frame body.

[0012] The utility model has the following beneficial effects:

[0013] 1. Under the combined action of the semi-toothed gear and the frame body, during the continuous rotation of the semi-toothed gear, the grate moves up and down in a cyclic manner, and the grate generates a shaking force to effectively remove the coal ash, thereby reducing the ash accumulation phenomenon in the furnace chamber, ensuring the cleanliness and heat transfer efficiency of the furnace chamber, further extending the service life of the furnace body, significantly improving the continuity and stability of the drying operation, reducing the frequency and difficulty of manual cleaning, lowering the labor intensity of the staff, and at the same time reducing the wear and damage to the equipment caused by frequent cleaning, thereby reducing the equipment maintenance cost;

[0014] 2. Under the combined action of the wedge-shaped block and the guide plate, when the coal ash falls, it slides up through the wedge-shaped block to the top of the guide plate, and at this time, it is diverted through the guide groove on the guide plate to the side of the furnace body bottom near the furnace door, which is convenient for cleaning the coal ash. Furthermore, it can ensure that the coal ash does not scatter randomly in the furnace, but concentrates and flows to the area near the furnace door, which is convenient for collection and cleaning. The staff can carry out the ash cleaning work more quickly and conveniently, reducing the time and labor intensity required for ash cleaning, reducing the pollution inside the equipment, helping to maintain the clean state of the furnace body, and improving the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall structural schematic diagram of the furnace body;

[0016] Figure 2 is the internal structural schematic diagram of the furnace body;

[0017] Figure 3 is the structural schematic diagram of the furnace body and the frame body;

[0018] Figure 4 is the structural schematic diagram of the frame body.

[0019] In the figure: 1. Furnace body; 101. Smoke outlet pipe; 102. Spiral pipe; 103. Limit groove; 2. Grate; 3. Slider; 4. Slide rod; 5. Frame body; 501. Moving groove; 502. Sealing gasket; 6. Rectangular plate; 7. Straight teeth; 8. Fixed block; 9. Rotating shaft; 10. Semi-toothed gear; 11. Motor; 12. Wedge-shaped block; 13. Guide plate; 1301. Guide groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0021] Referring to Figures 1-4 , a hot blast stove for a grain dryer, comprising a furnace body 1. A smoke outlet pipe 101 penetrates through the top of the furnace body 1. A spiral pipe 102 penetrates between the two side plates of the furnace body 1. Limiting grooves 103 are respectively opened in the two side plates of the furnace body 1. Slide rods 4 are connected in the two limiting grooves 103. Sliders 3 are respectively installed on both sides of the grate 2. The two slide rods 4 respectively penetrate through the corresponding sliders 3. When the grate 2 moves, the slider 3 slides on the slide rod 4 to limit the grate 2. A motor 11 is installed on one side of the furnace body 1. The output end of the motor 11 is connected to one end of a rotating shaft 9. By setting the motor 11, the rotating shaft 9 can be driven to rotate. A grate 2 is arranged inside the furnace body 1. A frame body 5 is arranged on one side of the furnace body 1. Two sealing gaskets 502 are installed on one side of the frame body 5. The sealing gasket 502 is made of graphite composite material and is in contact with the furnace body 1, so as to seal the rectangular plate 6 when it moves in one side plate of the furnace body 1. One side of the frame body 5 is connected with a rectangular plate 6. The rectangular plate 6 is connected with the grate 2. A moving groove 501 is opened inside the frame body 5. Straight teeth 7 are arranged on both side walls of the moving groove 501. Two fixed blocks 8 are installed on one side of the furnace body 1. A rotating shaft 9 rotates between the two fixed blocks 8. A semi-tooth gear 10 is engaged with the rotating shaft 9. The semi-tooth gear 10 is engaged with the straight teeth 7. When the furnace body 1 is in use, coal is placed on the grate 2. At this time, air is introduced into the spiral pipe 102. The hot air generated by the coal burning in the furnace body 1 heats the spiral pipe 102 and is discharged from the other end of the spiral pipe 102, while the generated flue gas is discharged from the smoke outlet pipe 101. At this time, the motor 11 is started to drive the rotating shaft 9 to rotate, so that the semi-tooth gear 10 rotates. Since the semi-tooth gear 10 has half teeth, after the semi-tooth gear 10 rotates one week, it can cooperate with the straight teeth 7 in the moving groove 501 to drive the frame body 5 to reciprocate up and down once. During the continuous rotation of the semi-tooth gear 10, the frame body 5 is driven to make the grate 2 reciprocate up and down through the rectangular plate 6. The grate 2 generates a shaking force to effectively remove the coal ash, thereby reducing the ash accumulation phenomenon in the furnace chamber.

[0022] Inside the furnace body 1, a wedge block 12 is installed. A furnace door is provided on one side of the furnace body 1, and the position of the furnace door corresponds to the downward-sloping position of the guide plate 13. The wedge block 12 is located at the bottom of the grate 2. One side of the wedge block 12 is connected to the guide plate 13. The top of the guide plate 13 is an inclined surface, and a guide groove 1301 is provided at the top of the guide plate 13. When the coal ash falls, it slides up through the wedge block 12 to the top of the guide plate 13. At this time, it is diverted through the guide groove 1301 on the guide plate 13 to the side of the furnace body 1 near the furnace door at the bottom. At this time, opening the furnace door can facilitate the cleaning of the coal ash, and thus it can be ensured that the coal ash will not be scattered randomly in the furnace.

[0023] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A hot air furnace for a grain dryer, characterized in that: include: A furnace body (1), wherein a grate (2) is arranged inside the furnace body (1), a frame (5) is arranged on one side of the furnace body (1), a rectangular plate (6) is connected to one side of the frame (5), the rectangular plate (6) is connected to the grate (2), a movable groove (501) is opened inside the frame (5), both side walls of the movable groove (501) are provided with spur teeth (7), two fixed blocks (8) are installed on one side of the furnace body (1), a rotating shaft (9) is rotatable between the two fixed blocks (8), a half-tooth gear (10) is matched on the rotating shaft (9), and the half-tooth gear (10) is meshed with the spur teeth (7); A wedge block (12) is installed inside the furnace body (1), and the wedge block (12) is located at the bottom of the grate (2). A guide plate (13) is connected to one side of the wedge block (12), and a guide groove (1301) is provided on the top of the guide plate (13).

2. A hot air furnace for a grain dryer according to claim 1, characterized in that: A smoke outlet pipe (101) passes through the top of the furnace body (1), and a spiral tube (102) passes through between the two side plates of the furnace body (1).

3. The hot air furnace for a grain dryer according to claim 1, characterized in that: Limiting grooves (103) are provided in both side plates of the furnace body (1), and sliding rods (4) are connected to the two limiting grooves (103).

4. A hot air furnace for a grain dryer according to claim 3, characterized in that: Slide blocks (3) are installed on both sides of the grate (2), and the two slide bars (4) respectively penetrate the corresponding slide blocks (3).

5. The hot air furnace for a grain dryer according to claim 1, characterized in that: A motor (11) is installed on one side of the furnace body (1), and an output end of the motor (11) is connected to one end of a rotating shaft (9).

6. A hot air furnace for a grain dryer according to claim 5, characterized in that: Two sealing pads (502) are installed on one side of the frame (5).

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