Vibrating type trolley grid plate

Abstract

The utility model discloses a vibrating type trolley grid plate, which can adapt to the granularity of lump ore to be dried by independently forming vent holes, and can have larger amplitude by using smaller exciting force when being combined with a dryer vibrating device to work, thereby effectively removing sticky materials on the trolley grid plate and ensuring that the vent holes of the grid plate are free of sticky materials. The air passing area of the trolley grid plate is guaranteed, the resistance of drying air passing through the grid plate is reduced, the drying effect is improved, and drying energy consumption is reduced. In addition, the vibrating type trolley grid plate further has the advantages of being simple in structure, good in lump ore drying effect, high in lump ore drying efficiency, low in production and maintenance cost and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel metallurgy processing equipment, concretely relates to a vibrating type trolley grate, belongs to the steel metallurgy processing equipment technical field. BACKGROUND

[0002] As the irreplaceable structural and functional material in the industrialization process, the consumption of steel accounts for more than 95% of the total metal consumption for a long time. The pig iron raw material required by the steel industry is mainly provided by blast furnace smelting, and the improvement and cost reduction of blast furnace smelting technology have a profound significance for promoting the development of steel enterprises. The basic link of blast furnace intensified smelting is fine material operation, and the common charging materials of blast furnace include sinter, pellet and natural lump ore. The so-called reasonable blast furnace burden structure is to find the most suitable matching ratio of different types of iron ore by adjusting the proportion of sinter, pellet and natural lump ore in the charging iron ore, so that the economic and technical indicators of the blast furnace smelting under the burden structure are relatively ideal, and the unit pig iron smelting consumption cost is relatively lowest.

[0003] At present, the charging lump ore is generally high in viscosity and high in powder content, especially the overseas imported lump ore, which generally has a moisture content of about 6% and a powder content of more than 20%. Due to water transportation, long transportation distance, multiple logistics links, open-air storage in the turnover process, increased damage during unloading and loading, etc., the powder content of lump ore is even as high as more than 30%. At the same time, the increase of water content in lump ore causes a large amount of powder to adhere to the surface of lump ore, and the vibrating screen screen plate is often blocked during screening, so that the screening effect cannot be achieved, and the powder adhering to the surface of lump ore finally enters the blast furnace, affecting the blast furnace permeability, increasing the blast furnace smelting cost, and affecting the stable and smooth operation of the blast furnace. Therefore, the reduction of moisture content of lump ore has important significance for reducing the cost of iron making and enhancing the stability of the furnace condition. Therefore, many steel enterprises begin to increase the lump ore drying system (such as trolley drying system), and the lump ore drying process is to dry the lump ore first, and the moisture content before drying is 6~7%, and the moisture content after drying is 2~3%, and then the screening is carried out. The advantages of this process method are obvious drying effect, which can effectively reduce the powder content of charging lump ore, thereby reducing the smelting cost of blast furnace. However, the gap between the existing louvers structure grate plates is large, which is not suitable for the particle size of the dried lump ore; and the cast trolley grate plate which can adapt to the particle size of the dried lump ore has high cost and large weight; and due to the high water content, high powder content and large viscosity of lump ore, the conventional trolley grate plate is easy to be blocked, and when the trolley is vibrated together, the grate plate and the trolley body are fixedly connected and vibrated together with the trolley body, and the amplitude is small under the same excitation force. SUMMARY

[0004] In view of the problems of large gap, small amplitude and poor dust cleaning effect of the existing shutter structure of the trolley grate, the utility model provides a vibrating trolley grate, which connects the grate plate body and the trolley through the fixed distance fixing mechanism with a special structure, so that the plate body and the trolley body have a movable gap, and then the plate body and the trolley body can move relatively. When the grate and the trolley body vibrate together, the amplitude of the grate plate body is larger under the action of the same exciting force, and then the dust cleaning effect is better, which can effectively prevent the occurrence of material blockage and leakage, and at the same time ensure the passability of the drying hot air, and then improve the drying efficiency of the lump ore.

[0005] In order to realize the above technical purpose, the technical scheme adopted by the utility model is as follows:

[0006] A vibrating trolley grate, which comprises a plate body and a fixed distance fixing mechanism. Ventilation holes and mounting holes are formed in the plate body. The plate body is installed on the trolley body through the mounting holes and the fixed distance fixing mechanism, and the fixed distance fixing mechanism can make the plate body and the trolley body have a movable gap, and then the plate body and the trolley body can move relatively.

[0007] As a preferred, the fixed distance fixing mechanism comprises a bolt and a fixed distance sleeve. An axial through hole is formed in the inside of the fixed distance sleeve, and the bolt passes through the axial through hole of the fixed distance sleeve and the bolt hole of the trolley body in sequence and then fixes the fixed distance sleeve on the trolley body. The plate body is sleeved on the outside of the fixed distance sleeve through the mounting hole, and the axial height of the fixed distance sleeve is greater than the thickness of the plate body, and the outer diameter of the fixed distance sleeve is smaller than the hole diameter of the mounting hole.

[0008] As a preferred, the fixed distance fixing mechanism further comprises a bolt protection sleeve. The bolt protection sleeve is a groove type structure, and a slot hole is formed in the middle of the groove bottom, and the bolt passes through the slot hole of the bolt protection sleeve, the axial through hole of the fixed distance sleeve and the bolt hole of the trolley body in sequence and then fixes the bolt protection sleeve and the fixed distance sleeve on the trolley body. The groove depth of the bolt protection sleeve is greater than the height of the cap end of the bolt.

[0009] As a preferred, the movable gap comprises an axial gap and a circumferential gap. In the static state that the lower surface of the plate body is attached to the surface of the trolley body, the gap reserved between the upper surface of the plate body and the upper end of the fixed distance sleeve is the axial gap, and the gap reserved between the inner wall of the mounting hole and the outer wall of the fixed distance sleeve is the circumferential gap.

[0010] As a preferred, the axial width of the axial gap is not greater than 4mm, preferably not greater than 2mm.

[0011] As a preferred, the axial width of the circumferential gap is not greater than 5mm, preferably not greater than 3mm.

[0012] Preferably, the plate body is a quadrilateral plate structure.

[0013] Preferably, the opening rate of the ventilation hole on the plate body is 20-40%, preferably 25-35%.

[0014] Preferably, the ventilation hole is a tapered through hole with a narrow upper end and a wide lower end in the thickness direction of the plate body.

[0015] Preferably, the narrow end of the ventilation hole has a diameter of no more than 8mm, preferably 4-7mm, and the wide end has a diameter of 9-15mm, preferably 10-12mm.

[0016] Preferably, the radial cross section of the ventilation hole is one or more of circular, square, triangular, straight strip-shaped or curved strip-shaped, preferably straight strip-shaped or curved strip-shaped.

[0017] In the utility model, ventilation holes are independently formed on the plate body of the grate plate, and the size of the ventilation holes can be determined according to the particle size of the lump ore to be dried. In addition, mounting holes are also formed on the plate body of the grate plate, and the distance fixing mechanism installs the plate body on the trolley body through the mounting holes. It should be noted that the distance fixing mechanism can provide a certain movement gap between the plate body and the trolley body, so that the plate body and the trolley body can move relative to each other. That is, when the plate body of the grate plate vibrates together with the trolley body, the amplitude of the plate body of the grate plate will be larger under the action of the same excitation force, thereby effectively removing the dust attached to the plate body or the fine material stuck in the ventilation hole, ensuring that the grate plate hole is free of material, thereby ensuring the hot air passing area of the trolley grate plate, reducing the resistance of the drying hot air passing through the grate plate, improving the drying effect, and reducing the drying energy consumption.

[0018] In the utility model, the distance fixing mechanism includes a bolt and a distance sleeve, the plate body is sleeved outside the distance sleeve through the mounting hole, and then the bolt is sequentially inserted through the axial through hole of the distance sleeve and the bolt hole of the trolley body to fix the distance sleeve on the trolley body. The axial height of the distance sleeve is greater than the thickness of the plate body, and the outer diameter of the distance sleeve is smaller than the hole diameter of the mounting hole. That is, the bolt is fixedly connected between the distance sleeve and the trolley through the distance sleeve, and the plate body is movably connected between the distance sleeve through the mounting hole, so that a movement gap (axial gap and circumferential gap) is reserved between the plate body and the trolley, and between the plate body mounting hole and the distance sleeve. Due to the existence of the movement gap, the plate body can move relative to the trolley when the phase of the trolley changes, so that the amplitude of the plate body is larger. It should be noted that in order to prevent material from being stuck, the gap width of the movement gap should be smaller than the minimum particle size of the material. In addition, the grate plate and the dryer trolley grate plate vibrator work together, and the material removal effect is better.

[0019] In the utility model, the bolt protection sleeve of the groove type structure is further arranged at the nut end of the bolt (including screw rod, nut, gasket and nut etc.). The slot of the bolt protection sleeve is upward, and the cap end of the bolt is completely surrounded in the groove. The bolt protection sleeve can effectively protect the bolt head, reduce the scouring of the material when the trolley is unloaded, and reduce the abrasion.

[0020] In the utility model, in the thickness direction of the plate body, the ventilation hole is the tapered through hole of upper narrow and lower wide, because the ventilation hole size of the grate plate body surface (contact surface with the material) is smaller, the leakage of the material is avoided, the ventilation hole size of the grate plate body bottom surface is larger, when the ventilation hole of the grate plate body is blocked, the scattered material is also easier to fall off. In addition, in the horizontal plane of the plate body, the radial section of the ventilation hole is one or more of circular, square, triangular, straight strip or curved strip, preferably straight strip or curved strip. The structure of the radial section of the ventilation hole can be reasonably designed according to the actual working condition.

[0021] Compared with the prior art, the utility model has the beneficial technical effects as follows:

[0022] 1: the vibration type trolley grate of the utility model is independently provided with a ventilation hole, can adapt to the particle size of the block ore to be dried, and when combined with the drying machine vibration device, a smaller exciting force can make the trolley grate have a larger amplitude, can effectively remove the material sticking to the trolley grate, ensure that the grate ventilation hole is free of material sticking, ensure the air passing area of the trolley grate, reduce the resistance of the drying air passing through the grate, improve the drying effect, and reduce the drying energy consumption.

[0023] 2: the vibration type trolley grate also has the advantages of simple structure, good block ore drying effect, high block ore drying efficiency and low production and maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure diagram of the grate plate of the prior art louver structure.

[0025] Figure 2 It is the structure diagram of the trolley grate of the utility model.

[0026] Figure 3 It is the enlarged schematic view of the plate body connected with the trolley body through the fixed distance fixing mechanism of the utility model.

[0027] Figure 4 It is the cross section structure schematic view of the grate plate with tapered ventilation hole of the utility model.

[0028] The drawings show that: 1: plate body; 101: ventilation hole; 102: mounting hole; 2: fixed distance fixing mechanism; 201: bolt; 202: fixed distance sleeve; 203: bolt protection sleeve; 3: trolley body. DETAILED DESCRIPTION

[0029] The technical scheme of the utility model is illustrated below, and the range of protection requested by the utility model includes but is not limited to the following embodiments.

[0030] A vibrating trolley grating, comprising a plate body 1 and a fixed-distance fixing mechanism 2. Ventilation holes 101 and mounting holes 102 are formed on the plate body 1. The plate body 1 is mounted on a trolley body 3 through the mounting holes 102 and the fixed-distance fixing mechanism 2, and the fixed-distance fixing mechanism 2 can make the plate body 1 have a movable gap with the trolley body 3, so that the plate body 1 can move relative to the trolley body 3.

[0031] Preferably, the fixed-distance fixing mechanism 2 comprises a bolt 201 and a fixed-distance sleeve 202. An axial through hole is formed in the fixed-distance sleeve 202, and the bolt 201 is fixed on the trolley body 3 by sequentially penetrating the axial through hole of the fixed-distance sleeve 202 and the bolt hole of the trolley body 3. The plate body 1 is sleeved on the outside of the fixed-distance sleeve 202 through the mounting holes 102, the axial height of the fixed-distance sleeve 202 is greater than the thickness of the plate body 1, and the outer diameter of the fixed-distance sleeve 202 is less than the hole diameter of the mounting hole 102.

[0032] Preferably, the fixed-distance fixing mechanism 2 further comprises a bolt protection sleeve 203. The bolt protection sleeve 203 is a groove structure, and a slot hole is formed in the middle of the groove bottom. The bolt 201 is fixed on the trolley body 3 by sequentially penetrating the slot hole of the bolt protection sleeve 203, the axial through hole of the fixed-distance sleeve 202 and the bolt hole of the trolley body 3. The groove depth of the bolt protection sleeve 203 is greater than the height of the cap end of the bolt 201.

[0033] Preferably, the movable gap comprises an axial gap and a circumferential gap. In the static state that the lower surface of the plate body 1 is attached to the surface of the trolley body 3, the gap between the upper surface of the plate body 1 and the upper end of the fixed-distance sleeve 202 is the axial gap, and the gap between the inner wall of the mounting hole 102 and the outer wall of the fixed-distance sleeve 202 is the circumferential gap.

[0034] Preferably, the axial width of the axial gap is not greater than 4mm, preferably not greater than 2mm.

[0035] Preferably, the axial width of the circumferential gap is not greater than 5mm, preferably not greater than 3mm.

[0036] Preferably, the plate body 1 is a quadrilateral plate structure. The mounting hole 102 is formed near the edge of the plate body 1, and the ventilation hole 101 is formed in the middle region of the plate body 1.

[0037] Preferably, the opening rate of the ventilation hole 101 on the plate body 1 is 20-40%, preferably 25-35%.

[0038] Preferably, in the thickness direction of the plate 1, the ventilation hole 101 is a tapered through hole that is narrow at the top and wide at the bottom.

[0039] Preferably, the narrow end diameter of the ventilation hole 101 is no greater than 8 mm, and more preferably 4-7 mm. The wide end diameter is 9-15 mm, and more preferably 10-12 mm.

[0040] Preferably, the radial cross-section of the ventilation hole 101 is one or more of the following: circular, square, triangular, straight, or curved, with straight or curved being the most preferred. Example 1

[0041] like Figures 2-4 As shown, a vibrating trolley grate includes a grate body 1 and a spacer fixing mechanism 2. Ventilation holes 101 and mounting holes 102 are provided on the grate body 1. The grate body 1 is mounted on a trolley body 3 via the mounting holes 102 and the spacer fixing mechanism 2. The spacer fixing mechanism 2 allows for a movable gap between the grate body 1 and the trolley body 3, thereby enabling relative movement between them. Example 2

[0042] The embodiment 1 is repeated, except that the distance fixing mechanism 2 includes a bolt 201 and a distance sleeve 202. The distance sleeve 202 has an axial through hole inside. The bolt 201 passes through the axial through hole of the distance sleeve 202 and the bolt hole of the trolley body 3 in sequence, fixing the distance sleeve 202 to the trolley body 3. The plate 1 is sleeved on the outside of the distance sleeve 202 through the mounting hole 102, and the axial height of the distance sleeve 202 is greater than the thickness of the plate 1, while the outer diameter of the distance sleeve 202 is smaller than the diameter of the mounting hole 102. Example 3

[0043] The embodiment 2 is repeated, except that the fixed-distance fixing mechanism 2 further includes a bolt protective sleeve 203. The bolt protective sleeve 203 has a groove-shaped structure with a slot in the center of its groove bottom. The bolt 201 passes sequentially through the slot of the bolt protective sleeve 203, the axial through hole of the fixed-distance sleeve 202, and the bolt hole of the trolley body 3, thus fixing the bolt protective sleeve 203 and the fixed-distance sleeve 202 onto the trolley body 3. The groove depth of the bolt protective sleeve 203 is greater than the height of the bolt 201 cap. Example 4

[0044] Repeat Example 3, except that the movable gap includes axial gap and circumferential gap. In the static state where the lower surface of plate 1 is in contact with the surface of trolley body 3, the gap reserved between the upper surface of plate 1 and the upper end of spacer sleeve 202 is the axial gap, and the gap reserved between the inner wall of mounting hole 102 and the outer wall of spacer sleeve 202 is the circumferential gap. Example 5

[0045] Example 4 is repeated, except that the axial width of the axial gap is not more than 2.5 mm. Example 6

[0046] Example 5 is repeated, except that the axial width of the circumferential gap is not more than 3.5 mm. Example 7

[0047] Example 6 is repeated, except that the plate body 1 is a quadrilateral plate structure. The mounting hole 102 is formed near the edge of the plate body 1, and the ventilation hole 101 is formed in the middle region of the plate body 1. Example 8

[0048] Example 7 is repeated, except that the opening rate of the ventilation hole 101 on the plate body 1 is 30%. Example 9

[0049] Example 8 is repeated, except that the ventilation hole 101 is a tapered through hole with a narrow upper part and a wide lower part in the thickness direction of the plate body 1. Example 10

[0050] Example 9 is repeated, except that the narrow end aperture of the ventilation hole 101 is 7 mm, and the wide end aperture is 10 mm. Example 11

[0051] Example 10 is repeated, except that the radial cross section of the ventilation hole 101 is circular. Example 12

[0052] Example 10 is repeated, except that the radial cross section of the ventilation hole 101 is square. Example 13

[0053] Example 9 is repeated, except that the radial cross section of the ventilation hole 101 is a straight strip shape. Example 14

[0054] Example 9 is repeated, except that the radial cross section of the ventilation hole 101 is a curved strip shape.

Claims

1. A vibratory table car grate, characterized by: The vibrating trolley grate comprises a plate body (1) and a fixed distance fixing mechanism (2); ventilation holes (101) and mounting holes (102) are formed on the plate body (1); the plate body (1) is mounted on the trolley body (3) through the mounting holes (102) and the fixed distance fixing mechanism (2), and the fixed distance fixing mechanism (2) can make the plate body (1) and the trolley body (3) have a movable gap, so that the plate body (1) and the trolley body (3) can move relatively.

2. A vibratory table pallet according to claim 1, characterised in that: The fixed distance fixing mechanism (2) comprises a bolt (201) and a fixed distance sleeve (202); an axial through hole is formed in the fixed distance sleeve (202), the bolt (201) passes through the axial through hole of the fixed distance sleeve (202) and the bolt hole of the trolley body (3) in sequence and then fixes the fixed distance sleeve (202) on the trolley body (3); the plate body (1) is sleeved on the outside of the fixed distance sleeve (202) through the mounting hole (102), and the axial height of the fixed distance sleeve (202) is greater than the thickness of the plate body (1), and the outer diameter of the fixed distance sleeve (202) is smaller than the hole diameter of the mounting hole (102).

3. A vibratory table pallet according to claim 2, characterised in that: The fixed distance fixing mechanism (2) further comprises a bolt protection sleeve (203); the bolt protection sleeve (203) is a groove type structure, a slot hole is formed in the middle of the groove bottom, the bolt (201) passes through the slot hole of the bolt protection sleeve (203), the axial through hole of the fixed distance sleeve (202) and the bolt hole of the trolley body (3) in sequence and then fixes the bolt protection sleeve (203) and the fixed distance sleeve (202) on the trolley body (3); the groove depth of the bolt protection sleeve (203) is greater than the height of the cap end of the bolt (201).

4. A vibrating table pallet according to claim 2 or 3, characterised in that: The movable gap comprises an axial gap and a circumferential gap; in the static state that the lower surface of the plate body (1) is attached to the surface of the trolley body (3), the gap reserved between the upper surface of the plate body (1) and the upper end of the fixed distance sleeve (202) is the axial gap, and the gap reserved between the inner wall of the mounting hole (102) and the outer wall of the fixed distance sleeve (202) is the circumferential gap.

5. A vibratory table pallet according to claim 4, characterised in that: The axial width of the axial gap is not greater than 4mm; and / or The axial width of the circumferential gap is not greater than 5mm.

6. A vibratory table pallet according to claim 5, wherein: The axial width of the axial gap is not greater than 2mm; and / or The axial width of the circumferential gap is not greater than 3mm.

7. A vibratory table pallet according to any one of claims 1-3, 5-6, characterized in that: The plate body (1) is a quadrilateral plate structure; the mounting hole (102) is formed on the periphery of the plate body (1) near the edge, and the ventilation hole (101) is formed in the middle region of the plate body (1).

8. A vibratory table pallet according to any one of claims 1-3, 5-6, characterized in that: The opening rate of the ventilation hole (101) on the plate body (1) is 20-40%.

9. A vibratory table pallet according to claim 8, characterised in that: The opening rate of the ventilation hole (101) on the plate body (1) is 25-35%.

10. A vibratory table pallet according to any one of claims 1-3, 5-6, 9, characterized in that: In the thickness direction of the plate body (1), the ventilation hole (101) is a tapered through hole with a narrow upper end and a wide lower end.

11. A vibratory table pallet according to claim 10, wherein: The narrow end hole diameter of the ventilation hole (101) is not greater than 8mm; The wide end hole diameter is 9-15mm.

12. A vibratory table pallet according to claim 11, characterised in that: The narrow end hole diameter of the ventilation hole (101) is 4-7mm; The wide end hole diameter is 10-12mm.

13. The vibratory table pallet of any of claims 1-3, 5-6, 9, 11-12, wherein: The radial cross section of the ventilation hole (101) is one or more of a circular shape, a square shape, a triangular shape, a straight strip shape and a curved strip shape.

14. A vibratory table pallet according to claim 13, characterised in that: The radial cross section of the ventilation hole (101) is a straight strip shape or a curved strip shape.

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