A sintering machine with slight negative pressure ignition

Abstract

The utility model relates to the technical field of sintering machines, and discloses a sintering machine with micro-negative pressure ignition. The device connects three groups of ventilation boxes through the ventilation duct on the back of the ignition bellows, and cooperates with the bypass air ducts on both sides to adjust the ventilation volume at any time. The ventilation duct and bypass air duct set obliquely are both provided with opening and closing valves to avoid ash accumulation and ensure the airtightness of the ignition bellows. The hydraulic cylinder drives the driving rack to move forward and backward, drives the transmission gear to roll synchronously forward and backward, and converts the forward and backward translation force into vertical lifting, drives the stacking plate to rise, and the ignition plate is tilted. The accumulated material after burning can slide down to the discharge trough. The two groups of driving grooves on the inner wall of the discharge frame on the bottom of the discharge cover are slidably connected with the ash discharge valve and the dust collection box. The box door that slides up and down cooperates with the ash discharge valve to realize double-layer ash discharge protection, reduce the inhalation of cold air, and timely ash discharge ensures the air permeability of the original sintering material layer. The negative pressure stability is strong, the ignition is uniform, and the solid-gas separation discharge has good sintering quality.

Description

Technical Field

[0001] The utility model relates to the technical field of sintering machines, in particular to a sintering machine with slight negative pressure ignition. Background Art

[0002] The sintering machine provides enough heat to the surface of the sintering material through sintering ignition, so that the solid carbon in it ignites and burns. At the same time, the surface sintering material is dried, burned and sintered under the action of high-temperature flue gas, producing a certain liquid phase to bond into blocks, forming a sintered ore with a certain strength, and the sintering process is carried out from top to bottom with the help of forced ventilation. The ignition effect directly affects the normal progress of the sintering process and the quality of the sintered ore. If the ignition negative pressure is too high, the flame of the ignition furnace will be inward, and cold air will be sucked in from all sides of the ignition furnace, reducing the furnace temperature. The ignition effect of the trolley edge is poor, and the combustible components of the ignition fuel are sucked into the material layer too early. The surface ignition heat is insufficient, and the excessive air volume drawn in destroys the permeability of the original material layer, increases the resistance of the material layer, and increases the amount of ash entering the wind box branch pipe.

[0003] There are still some problems with the currently widely used sintering machines with micro-negative pressure ignition, such as the low-negative pressure ignition bellows valve device for sintering machines with publication number CN204705188U. This device controls the opening and closing angle of the flap through a side-axis valve. Compared with the traditional butterfly valve, the exhaust force surface has less resistance. However, in actual use, when there is a lot of material falling on the sintering machine trolley, the opening and closing angle cannot be accurately controlled, the ventilation volume is difficult to control, and the ignition negative pressure inside the furnace is unstable, which is not conducive to the normal production of sintered ore. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a sintering machine with micro-negative pressure ignition, which has the advantages of strong negative pressure stability, uniform ignition, solid-gas separation and discharge, and good sintering quality, thus solving the above technical problems.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sintering machine with micro-negative pressure ignition, comprising an ignition bellows, a ventilation box fixedly installed at the bottom of the ignition bellows, a pressure sensor fixedly installed on the inner wall of the ventilation box, a fixed seat fixedly installed at the bottom of the ventilation box, a hydraulic cylinder fixedly installed on the back of the fixed seat, a transmission mechanism fixedly connected to the output end of the hydraulic cylinder and passing through the surface of the fixed seat, a ventilation duct fixedly installed on the back of the ventilation box, an end of the ventilation duct away from the ventilation box is fixedly connected to the ignition bellows, an ignition plate is slidably connected to the bottom surface of the inner wall of the ignition bellows, a stacking plate is rotatably connected to the top surface of the ignition plate, a discharge mechanism is fixedly installed on the front of the ignition bellows, and bypass air ducts are fixedly installed on both sides of the ignition bellows.

[0008] As the preferred technical scheme of the utility model, the transmission mechanism includes a pushing rack, a pushing gear, a pushing rod, a transmission gear and a transmission rod. The front and top surfaces of the fixed seat are provided with through grooves. The output end of the hydraulic cylinder is fixedly connected with the pushing rack and passes through the through groove on the front surface of the fixed seat. The top surface of the pushing rack is meshed with the pushing gear and are perpendicular to each other. A pushing rod is fixedly connected at the center of the pushing gear and passes through the two side surfaces of the pushing gear. Transmission gears are fixedly connected at both ends of the pushing rod. Two groups of transmission gears are provided. The rear end of each group of transmission gears is meshed with a transmission rod and passes through the through groove on the top surface of the fixed seat. The two groups of transmission rods have the same length, and the top end of the transmission rod is fixedly connected to the stacking plate.

[0009] As the preferred technical solution of the utility model, the ignition bellows is a square structure, a sliding groove is fixedly installed on the front side of the ignition bellows, a box door is slidably connected to the inner wall of the sliding groove, a window is fixedly installed at the center of the box door, the stacking plate is provided with a plurality of groups of discharge holes, the rear end of the stacking plate is rotatably connected to the ignition plate, the area of ​​the ignition plate is smaller than the area of ​​the stacking plate, and a discharge groove is provided on the bottom surface of the ignition bellows, which runs through the inner wall of the ignition bellows.

[0010] As the preferred technical solution of the utility model, the discharge mechanism includes a discharge hood, a discharge frame and an ash discharge valve. The discharge hood is fixedly installed on the front of the ignition bellows. The discharge hood is a wedge-shaped structure and is made of high-temperature resistant transparent material. The bottom surface of the discharge hood is fixedly connected to the discharge frame. The inner wall of the discharge frame is provided with two groups of push grooves. The inner wall of the push groove is slidably connected to the ash discharge valve and the dust collection box.

[0011] As the preferred technical solution of the utility model, two groups of upper vents are provided at one end of the ventilation duct close to the ignition wind box, and each group of upper vents is provided with an opening and closing valve, and three groups of lower vents are provided at one end of the ventilation duct close to the ventilation box, and the ventilation box is provided with three groups.

[0012] As a preferred technical solution of the utility model, the ventilation duct and the bypass air duct both form an angle with the surface of the ignition wind box, and the two groups of bypass air ducts are both provided with opening and closing valves.

[0013] Compared with the prior art, the utility model provides a sintering machine with slight negative pressure ignition, which has the following beneficial effects:

[0014] 1. The utility model sets a box door that slides up and down on the front of the ignition bellows, which is convenient for operators to discharge and stack materials. A ventilation duct is fixedly installed on the back of the ignition bellows to connect three sets of ventilation boxes, and bypass air ducts are fixedly installed on both sides to adjust the ventilation volume at any time according to the combustion state. The inclined ventilation duct and bypass air duct are both provided with opening and closing valves to avoid the accumulation of burning ashes in the duct and ensure the airtightness of the ignition bellows. When the stacking plate rises, the ignition plate connected to the rotation is driven to tilt, and the accumulated materials after burning can slide down It falls to the discharge chute, and a wedge-shaped discharge cover is fixedly installed on the front of the ignition bellows, which is made of high-temperature resistant transparent material. The discharge operation is more flexible after observing the sintering status. The bottom of the discharge cover is fixedly connected to a discharge frame, and two sets of push grooves on the inner wall of the discharge frame are slidably connected to the ash discharge valve and the dust collection box. The box door cooperates with the ash discharge valve to achieve double-layer ash discharge protection, ensuring that the negative pressure of the ignition bellows is maintained below -7kpa, increasing the surface ignition heat, reducing the inhalation of cold air, and timely ash discharge ensures the air permeability of the original sintering material layer, strong negative pressure stability and uniform ignition.

[0015] 2. The utility model arranges through grooves on the front and top surfaces of the fixed seat, so that the hydraulic cylinder drives the pushing rack to translate back and forth, and the top surface of the pushing rack meshes with the pushing gear and is perpendicular to each other. A pushing rod is fixedly connected to the center of the pushing gear, and transmission gears are fixedly connected to both ends of the pushing rod, so that the pushing rack can translate back and forth to drive the pushing gear, the pushing rod and two sets of transmission gears to roll back and forth synchronously. A transmission rod is meshed at the rear end of the transmission gear, and the two sets of transmission rods are perpendicular to the fixed seat. In cooperation with the two sets of transmission gears, the force of the forward and backward translation is converted into vertical lifting, which drives the stacking plate to lift vertically and causes the accumulated material after combustion to fall automatically. At this time, the ignition plate slides from a parallel state to an inclined state, and the closed discharge ensures the effective air volume of the original material layer, and the solid-gas separation discharge has a good sintering quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a detailed diagram of the transmission mechanism of the utility model structure;

[0018] Figure 3 This is a detailed diagram of the discharge mechanism of the utility model structure;

[0019] Figure 4 This is a plan view of the overall structure of the utility model.

[0020] Among them: 1. Ignition bellows; 2. Ventilation box; 3. Fixed seat; 4. Hydraulic cylinder; 5. Ventilation duct; 6. Ignition plate; 7. Stacking plate; 8. Bypass air duct; 9. Push rack; 10. Push gear; 11. Transmission gear; 12. Transmission rod; 13. Box door; 14. Discharge cover; 15. Discharge frame; 16. Ash discharge valve. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] See also Figure 1-4 A sintering machine with micro-negative pressure ignition comprises an ignition wind box 1, a ventilation box 2 fixedly installed at the bottom of the ignition wind box 1, a pressure sensor fixedly installed on the inner wall of the ventilation box 2, a fixed seat 3 fixedly installed at the bottom of the ventilation box 2, a hydraulic cylinder 4 fixedly installed on the back of the fixed seat 3, a transmission mechanism fixedly connected to the output end of the hydraulic cylinder 4 and running through the surface of the fixed seat 3, a ventilation duct 5 fixedly installed on the back of the ventilation box 2, and one end of the ventilation duct 5 away from the ventilation box 2 is fixedly connected to the ignition wind box 1, an ignition plate 6 is slidably connected to the bottom surface of the inner wall of the ignition wind box 1, a stacking plate 7 is rotatably connected to the top surface of the ignition plate 6, a discharge mechanism is fixedly installed on the front of the ignition wind box 1, and bypass air ducts 8 are fixedly installed on both sides of the ignition wind box 1.

[0025] Furthermore, the transmission mechanism includes a pushing rack 9, a pushing gear 10, a pushing rod, a transmission gear 11 and a transmission rod 12. The front and top surfaces of the fixed seat 3 are both provided with through grooves. The output end of the hydraulic cylinder 4 is fixedly connected with the pushing rack 9 and passes through the through groove on the front surface of the fixed seat 3, so that the hydraulic cylinder drives the pushing rack 9 to translate forward and backward. The top surface of the pushing rack 9 is meshed with the pushing gear 10 and is perpendicular to each other. A pushing rod is fixedly connected at the center of the pushing gear 10 and passes through the surfaces on both sides of the pushing gear 10. The two ends of the pushing rod are fixedly connected with the transmission gears 11, so that the pushing rack 9 is driven to translate forward and backward. The pushing gear 10, the pushing rod and the two sets of transmission gears 11 roll forward and backward synchronously. There are two sets of transmission gears 11. A transmission rod 12 is meshed at the rear end of each set of transmission gears 11 and passes through the through groove on the top surface of the fixed seat 3. The two sets of transmission rods 12 have the same length. The top ends of the transmission rods 12 are fixedly connected to the stacking plate 7. The two sets of transmission rods 12 are perpendicular to the fixed seat 3. In conjunction with the two sets of transmission gears 11, the force of the forward and backward translation is converted into vertical lifting, which drives the stacking plate 7 to rise and fall vertically, so that the accumulated materials after combustion fall automatically, which not only ensures the airtightness, but also ensures the smooth discharge of the accumulated materials, thereby increasing the effective air volume of the material layer.

[0026] Furthermore, the ignition bellows 1 is a square structure, and a sliding groove is fixedly installed on the front side of the ignition bellows 1. The inner wall of the sliding groove is slidably connected to a box door 13. The box door 13 slides up and down for the convenience of the operator to discharge and stack materials, and also ensures the airtightness of the ignition bellows 1. A window is fixedly installed at the center of the box door 13 for real-time observation of the sintering state. The stacking plate 7 is provided with a plurality of groups of discharge holes. The rear end of the stacking plate 7 is rotatably connected to the ignition plate 6. The area of ​​the ignition plate 6 is smaller than that of the stacking plate 7. A discharge groove is provided on the bottom surface of the ignition bellows 1 and runs through the inner wall of the ignition bellows 1. When the stacking plate 7 is raised, the rotatably connected ignition plate 6 is driven to tilt, and the accumulated material after combustion can slide down to the discharge groove.

[0027] Furthermore, the discharging mechanism includes a discharging hood 14, a discharging frame 15 and an ash discharge valve 16. The discharging hood 14 is fixedly installed on the front of the ignition bellows 1 to ensure that the negative pressure inside the bellows is stable during the discharging operation. The discharging hood 14 is a wedge-shaped structure and is made of high-temperature resistant transparent material. The bottom surface of the discharging hood 14 is fixedly connected to the discharging frame 15. The inner wall of the discharging frame 15 is provided with two groups of push grooves. The inner wall of the push groove is slidably connected to the ash discharge valve 16 and the dust collecting box. The box door 13 cooperates with the ash discharge valve 16 to realize double-layer ash discharge protection, ensuring that the negative pressure of the ignition bellows 1 is maintained below -7kpa, increasing the surface ignition heat, reducing the inhalation of cold air, and timely ash discharge ensures the air permeability of the sintering original material layer, thereby improving the output and quality of the sintered ore.

[0028] Furthermore, two groups of upper vents are provided at one end of the ventilation duct 5 close to the ignition wind box 1, and each group of upper vents is provided with an opening and closing valve, so as to adjust the ventilation volume at any time according to the combustion state. Three groups of lower vents are provided at one end of the ventilation duct 5 close to the ventilation box 2, and the ventilation box 2 is provided with three groups.

[0029] Furthermore, the ventilation duct 5 and the bypass air duct 8 form an angle with the surface of the ignition wind box 1. The inclined ventilation duct 5 and the bypass air duct 8 prevent the accumulation of burning ashes in the duct, thereby affecting the ventilation effect. Both sets of bypass air ducts 8 are provided with opening and closing valves.

[0030] When in use, slide upward to open the box door 13, lay the solid charcoal and sintered material flat on the top surface of the stacking plate 7, slide downward to close the box door 13, start the hydraulic cylinder 4, and drive the push gear 10 to move forward, so that the meshing push gear 10 drives the push rod and the transmission gear 11 to roll synchronously, driving the two sets of transmission rods 12 to move downward while the stacking plate 7 fixedly connected to the top of the transmission rod 12 drives the material to drop to the bottom surface of the inner wall of the ignition bellows 1, and close the hydraulic cylinder 4. At this time, the ignition plate 6 slides forward from an inclined state to fit with the bottom surface of the inner wall of the ignition bellows 1, and the ignition plate 6 is started for ignition, and the ventilation duct 5 and the bypass air duct 8 are opened synchronously to ensure that the static pressure in the box is a slight negative pressure, and the ignition flame neither spreads outward nor retracts inward. The static pressure in the control box is below -50pa, and the negative pressure of the three groups of ventilation boxes 2 at the bottom of the corresponding ignition bellows 1 is stabilized at below -7kpa. During the sintering process of the material, the exhaust gas generated is discharged through the bypass air duct 8, and the accumulated material passes through the multiple groups of discharge holes on the surface of the stacking plate 7 and automatically falls into the ignition plate 6, so as to separate the exhaust gas and the accumulated material. The hydraulic cylinder 4 is started again to drive the push gear 9 to translate backward, so that the meshing push gear 10 drives the push rod and the transmission gear 11 to roll synchronously, and drives the two groups of transmission rods 12 to translate upward. At the same time, the stacking plate 7 fixedly connected to the top of the transmission rod 12 drives the material to rise. At this time, the ignition plate 6 slides backward from the parallel state to the inclined state, and the box door 13 slides upward and the ash discharge valve 16 is pushed forward synchronously. The separated accumulated material automatically slides into the discharge chute and then falls into the dust box, completing the unified collection of the accumulated material.

[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 sintering machine with micro-negative pressure ignition, comprising an ignition wind box (1), a ventilation box (2) fixedly mounted at the bottom of the ignition wind box (1), a pressure sensor fixedly mounted on the inner wall of the ventilation box (2), and a fixing seat (3) fixedly mounted at the bottom of the ventilation box (2), characterized in that: A hydraulic cylinder (4) is fixedly mounted on the back of the fixed seat (3); the output end of the hydraulic cylinder (4) is fixedly connected to a transmission mechanism and penetrates the surface of the fixed seat (3); a ventilation duct (5) is fixedly mounted on the back of the ventilation box (2); one end of the ventilation duct (5) away from the ventilation box (2) is fixedly connected to the ignition wind box (1); an ignition plate (6) is slidably connected to the bottom surface of the inner wall of the ignition wind box (1); a stacking plate (7) is rotatably connected to the top surface of the ignition plate (6); a discharge mechanism is fixedly mounted on the front of the ignition wind box (1); bypass air ducts (8) are fixedly mounted on both sides of the ignition wind box (1).

2. A sintering machine with slight negative pressure ignition according to claim 1, characterized in that: The transmission mechanism comprises a pushing rack (9), a pushing gear (10), a pushing rod, a transmission gear (11) and a transmission rod (12). The front and top surfaces of the fixed seat (3) are both provided with through grooves. The output end of the hydraulic cylinder (4) is fixedly connected with the pushing rack (9) and passes through the through groove on the front surface of the fixed seat (3). The top surface of the pushing rack (9) meshes with the pushing gear (10) and is perpendicular to each other. The center of the pushing gear (10) is fixedly connected with a pushing rod and passes through the two side surfaces of the pushing gear (10). Both ends of the pushing rod are fixedly connected with transmission gears (11). Two groups of transmission gears (11) are provided. The rear end of each group of transmission gears (11) meshes with a transmission rod (12) and passes through the through groove on the top surface of the fixed seat (3). The two groups of transmission rods (12) have the same length. The top end of the transmission rod (12) is fixedly connected to the stacking plate (7).

3. A sintering machine with slight negative pressure ignition according to claim 1, characterized in that: The ignition wind box (1) is of a square structure. A sliding groove is fixedly installed on the front of the ignition wind box (1). A box door (13) is slidably connected to the inner wall of the sliding groove. A window is fixedly installed at the center of the box door (13). The stacking plate (7) is provided with a plurality of groups of discharge holes. The rear end of the stacking plate (7) is rotatably connected to the ignition plate (6). The area of ​​the ignition plate (6) is smaller than that of the stacking plate (7). A discharge groove is provided on the bottom surface of the ignition wind box (1) and penetrates the inner wall of the ignition wind box (1).

4. A sintering machine with slight negative pressure ignition according to claim 1, characterized in that: The discharge mechanism comprises a discharge cover (14), a discharge frame (15) and an ash discharge valve (16); the discharge cover (14) is fixedly mounted on the front of the ignition bellows (1); the discharge cover (14) is a wedge-shaped structure and is made of a high-temperature resistant transparent material; the bottom surface of the discharge cover (14) is fixedly connected to the discharge frame (15); the inner wall of the discharge frame (15) is provided with two groups of push grooves; the inner wall of the push groove is slidably connected to the ash discharge valve (16) and the dust collection box.

5. The sintering machine with slight negative pressure ignition according to claim 1, characterized in that: The ventilation duct (5) is provided with two groups of upper ventilation openings at one end close to the ignition wind box (1), and each group of upper ventilation openings is provided with an opening and closing valve. The ventilation duct (5) is provided with three groups of lower ventilation openings at one end close to the ventilation box (2), and the ventilation box (2) is provided with three groups.

6. The sintering machine with slight negative pressure ignition according to claim 1, characterized in that: The ventilation duct (5) and the bypass air duct (8) both form an angle with the surface of the ignition wind box (1), and the two groups of bypass air ducts (8) are both provided with opening and closing valves.

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