Flexible grid plate for trolley

Abstract

The utility model discloses a flexible grid plate for a trolley. The flexible grid plate comprises a grid plate frame and flexible grid sections, the grate plate frame is of a frame structure with an opening in the middle, and the flexible grate bars are of a metal chain structure. And the plurality of flexible grid sections are flatly paved in the middle opening of the grid plate frame in a mutually parallel manner and are fully distributed in the middle opening. The flexible grid plate has the advantages that the deformation quantity and the ring hole diameter are suitable and controllable, the flexible grid plate can well adapt to the granularity of lump ore, and due to the fact that the grid plate is of a flexible structure, sticky materials on the grid plate of the trolley can be automatically removed when the grid plate overturns in the discharging process, it is guaranteed that the grid plate is free of the sticky materials, the air passing area of the trolley is guaranteed, and the resistance of drying air passing through the grid plate is reduced; drying effect is improved and energy consumption of the dryer is reduced. In addition, the flexible grid plate further has the advantages of being simple in overall structure, convenient to install and maintain, low in input cost, relative in weight and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a trolley for steel metallurgical processing, in particular to a flexible grate plate for trolley, belong to steel metallurgical processing equipment technical field. BACKGROUND

[0002] Steel as the industrialization process irreplaceable structural, functional material, its consumption occupies more than 95% of total metal consumption in quite a long time. The pig iron raw material needed by steel industry is mainly provided by blast furnace smelting, and the improvement of blast furnace smelting technology and the reduction of cost have a far-reaching significance for promoting the development of steel enterprises. The basic link of blast furnace intensified smelting is fine material operation, and the common blast furnace charging material includes sinter, pellet and natural lump ore. The so-called reasonable blast furnace burden structure is to find the most suitable matching ratio of different kinds 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. Research shows that the cost expenditure of iron ore and other raw material links accounts for about 60% of the total cost of pig iron, the market price of lump ore is basically the same as that of fine ore, and the cost price is far lower than that of sinter and pellet, so increasing the proportion of lump ore is an effective measure to reduce the cost of blast furnace raw material. In addition, under the condition of the same pig iron scale, replacing part of sinter or pellet with lump ore is equivalent to reducing about 42 kg of standard coal consumption (replacing sinter) or about 18 kg of standard coal consumption (replacing pellet) per ton of lump ore, so by increasing the proportion of lump ore, establishing a new economic burden structure and reducing the energy consumption and pollutants in the preparation process of sinter and pellet, an important technical measure for low carbon, emission reduction and clean production is realized.

[0003] At present, the block ore into the furnace generally has large viscosity and high powder content, especially the imported block ore from overseas generally has moisture of about 6% and powder content of more than 20%. Due to water transportation, long transportation distance, many logistics links, open-air storage in the turnover process, increased damage in loading and unloading, etc., the block ore even has powder content of more than 30%. At the same time, the increase of moisture in the block ore causes a large amount of powder to adhere to the surface of the block ore, and the screen deck of the vibrating screen is often blocked during screening, which cannot play a screening effect, so that the powder adhering to the surface of the block ore finally enters the blast furnace, affecting the permeability of the blast furnace, increasing the smelting cost of the blast furnace, and affecting the stable and smooth operation of the blast furnace. Therefore, the reduction of moisture content of the block ore has important significance for reducing the ironmaking cost and enhancing the stability of the furnace condition. Therefore, many steel enterprises begin to increase the block ore drying system (such as the pallet drying system). This block ore drying process is to dry the block ore first, and the moisture content before drying is 6-7%, and the moisture content after drying is 2-3%, and then the block ore is screened. The advantage of this process is that the drying effect is obvious, which can effectively reduce the powder content of the block ore into the furnace, thereby reducing the smelting cost of the blast furnace. However, the existing louvre structure has large gap between the screen decks, which is not suitable for the particle size of the dried block ore. The cast pallet screen deck can adapt to the particle size of the dried block ore, but has high cost and large weight. Moreover, due to high moisture and powder content and large viscosity of the block ore, the conventional pallet screen deck is easy to be blocked, and when the pallet is vibrated together, the amplitude is small under the same excitation force. Practical new type content

[0004] In view of the problems in the prior art, such as the conventional pallet screen deck being easy to be blocked, the difficulty in cleaning the material after being blocked, and the influence on the drying effect of the block ore, the utility model provides a flexible screen deck for a pallet, which can well adapt to the particle size of the block ore, and the flexible structure of the screen deck can automatically clean the adhered material on the pallet screen deck during overturning in the unloading process, so that the screen deck is free of adhered material, the air passing area of the pallet is ensured, the resistance of the drying air passing through the screen deck is reduced, the drying effect is improved, and the energy consumption of the dryer is reduced. In addition, the utility model also has the advantages of simple structure, low investment cost, and relatively light weight.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical scheme:

[0006] A flexible screen deck for a pallet, which comprises a screen deck frame and flexible screen strips. The screen deck frame is a frame structure with an opening in the middle, and the flexible screen strips are metal chain structures. A plurality of flexible screen strips are installed in the opening in the middle of the screen deck frame in a parallel manner and cover the opening.

[0007] As a preferred embodiment, the flexible screen strip comprises a plurality of metal round rings connected in series. The hole diameter of any metal round ring is not greater than 8mm, and is preferably 3-6mm.

[0008] As a preference, the maximum gap between any two adjacent flexible grate bars and the maximum gap between the flexible grate bars at the outer side edges and the grate frame are not more than 8mm, preferably 3-6mm.

[0009] As a preference, the grate frame is a quadrilateral frame structure formed by connecting four frame beams end to end. At least two frame beams of the quadrilateral frame structure are arranged in parallel with each other.

[0010] As a preference, the grate frame is a trapezoidal frame structure with an opening in the middle. Mounting holes are formed on the pair of frame beams of the trapezoidal frame structure that are parallel to each other. The grate frame is arranged on the trolley through the mounting holes and bolts.

[0011] As a preference, grate bar positioning posts are arranged on both frame beams of the grate frame that do not have mounting holes. Both ends of all flexible grate bars are connected to the grate frame through the grate bar positioning posts.

[0012] As a preference, a pressing plate is further arranged on each grate bar positioning post. The pressing plate is in an L-shaped structure, one end of which is connected to the grate frame and the other end of which extends above the grate bar positioning post. Preferably, a positioning nut is connected to the top end of the grate bar positioning post after it passes through the pressing plate.

[0013] As a preference, the flexible grate bars include long chain grate bars and short chain grate bars, which are arranged in an alternating long-short-long or short-long-short manner in the opening in the middle of the grate frame.

[0014] As a preference, a support bar is further arranged in the opening in the middle of the grate frame, which is located below the flexible grate bars and in vertical or intersecting contact with the flexible grate bars.

[0015] As a preference, a positioning ring or tube is further arranged on the support bar at a position corresponding to each flexible grate bar. Each flexible grate bar needs to pass through the corresponding positioning ring or tube.

[0016] As a preference, the strip body of each flexible grate bar passing through the positioning ring or tube is a circular column, and the length of the circular column is greater than the axial length of the positioning ring or tube.

[0017] In the utility model, the flexible grate strip of the plate surface of the flexible grate bearing main body is metal chain structure, compared with the grate plate of the existing shutter structure, the chain hole of the flexible grate strip of the chain structure is more suitable for the grain size of the furnace block ore, and the chain surface is smooth and does not form a connected plane, so that it is difficult to accumulate dust; further, since the relative movable connection relationship between each metal ring of the chain, even if the surface has a small amount of dust, in the process of running and unloading the trolley, through the vibration of the chain with the trolley, the collision and friction between the chain and the chain, the collision and friction between the metal rings in the chain and the metal rings, a small amount of adhered dust is also easily cleaned, thereby effectively maintaining the permeability of the through hole of the flexible grate strip, thereby ensuring the air passing area of the grate plate, reducing the resistance of the drying air passing through the grate plate, greatly improving the drying effect, and reducing the energy consumption of the dryer. That is, the trolley changes in phase during the working process, and the flexible grate plate turns over with the trolley body by more than 90 degrees in the unloading area, and the flexible grate plate turns over in the turning process, and the material can be automatically removed. It should be noted that the flexible grate plate and the dryer trolley grate plate vibrator work together, and the cleaning effect is better.

[0018] In the utility model, the ring hole diameter of the metal ring of the flexible grate strip and the gap between the flexible grate strips are not greater than the minimum particle size of the block ore to be dried, and after the flexible grate strip is installed in the middle opening of the grate frame, the deformation amount also needs to meet the requirement of not causing the block ore with the minimum particle size to scatter. Whether it is the ring hole diameter of the metal ring or the gap between the flexible grate strips or its deformation amount can be reasonably selected and adjusted according to the actual working condition.

[0019] In the utility model, the frame structure of the grate frame is generally a closed quadrilateral frame structure formed by four frame beams connected end to end, and the specific size and shape can be changed according to the needs of the trolley. Generally, the grate frame is mainly a trapezoidal frame structure with a middle opening. A mounting hole is formed in a pair of frame beams of the grate frame. The grate frame is arranged on the trolley through the mounting hole and the bolt.

[0020] In the utility model, a plurality of pairs of grate positioning columns are arranged on the two frame beams of the grate frame, and each pair of grate positioning columns is connected with a flexible grate strip, that is, the two ends of any flexible grate strip are installed on the grate frame through the grate positioning column. It should be noted that the distance between any pair of grate positioning columns corresponds to the length of the flexible grate strip arranged therebetween, so that the deformation amount (mainly the falling arc) of the flexible grate strip is within the set range. Further, the distance between any pair of grate positioning columns is adjustable (for example, the grate positioning column is connected with the grate frame through the sliding groove and the fixed sliding block).

[0021] In the utility model, the pressing plate is L-shaped structure, one end of the pressing plate is connected with the grate frame, and the other end extends above the grate positioning column (as shown in the figure). Figure 3 The top end of the grate positioning column is connected with a positioning nut after penetrating through the pressing plate upwards.

[0022] In the utility model, the flexible grate includes long chain grate and short chain grate, and the long chain grate and the short chain grate are arranged in long-short-long or short-long-short mode in the middle opening of the grate frame.

[0023] In the utility model, the supporting strip is arranged in the middle opening of the grate frame and is located below the flexible grate and vertically or crosswise contacts with the flexible grate.

[0024] Compared with the prior art, the utility model has the beneficial technical effects as follows:

[0025] 1: The deformation amount and the aperture of the flexible grate are controllable, the flexible grate can well adapt to the particle size of the lump ore, the flexible grate can automatically remove the adhered material on the grate frame during the overturning in the unloading process, the grate frame is ensured to be free of adhered material, the grate frame is ensured to have the passing area, the resistance of the drying air passing through the grate frame is reduced, the drying effect is improved, and the energy consumption of the dryer is reduced.

[0026] 2: The flexible grate has simple overall structure, is convenient to install and maintain, has low investment cost, and has relatively small weight. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the structural schematic view of the flexible grate of the utility model.

[0028] Figure 2 It is the structural schematic view of the grate frame of the utility model.

[0029] Figure 3 It is the enlarged schematic view of the connecting place of the flexible grate strip and the grate frame of the utility model.

[0030] Figure 4 It is the structural schematic view of the support strip of the utility model being provided with the positioning ring or the circular tube.

[0031] Figure 5 It is the installation distribution schematic view of the flexible grate on the trolley of the utility model.

[0032] Reference signs: 1: grate frame; 101: mounting hole; 102: grate strip positioning column; 103: pressing plate; 104: support strip; 105: positioning ring or circular tube; 2: flexible grate strip. DETAILED DESCRIPTION

[0033] The technical scheme of the utility model is illustrated below, and the scope of protection requested by the utility model includes but is not limited to the following embodiments.

[0034] A flexible grate for a trolley, which comprises a grate frame 1 and a flexible grate strip 2. The grate frame 1 is a frame structure with an opening in the middle, and the flexible grate strip 2 is a metal chain structure. A plurality of the flexible grate strips 2 are installed in parallel with each other in the opening in the middle of the grate frame 1 and cover the opening.

[0035] As a preferred, the flexible grate strip 2 comprises a plurality of metal rings connected in series. The aperture of the ring hole of any one metal ring is not greater than 8mm, preferably 3-6mm.

[0036] As a preferred, in all the flexible grate strips 2: the maximum gap between any two adjacent flexible grate strips 2 and the maximum gap between the flexible grate strip 2 at the outer edge and the grate frame 1 are not greater than 8mm, preferably 3-6mm.

[0037] As a preferred, the grate frame 1 is a quadrilateral frame structure formed by connecting four frame beams end to end. At least two frame beams of the quadrilateral frame structure are arranged in parallel with each other.

[0038] As a preferred, the grate frame 1 is a trapezoidal frame structure with an opening in the middle. The mounting hole 101 is formed on the pair of frame beams parallel to each other of the trapezoidal frame. The grate frame 1 is arranged on the trolley through the mounting hole 101 and the bolt.

[0039] Preferably, grate bar positioning posts 102 are provided on both frame beams of the grate frame 1 where there are no mounting holes 101. Both ends of all flexible grate bars 2 are connected to the grate frame 1 through the grate bar positioning posts 102.

[0040] Preferably, each of the grate bar positioning posts 102 is also provided with a pressure plate 103. The pressure plate 103 has an L-shaped structure, with one end connected to the grate frame 1 and the other end extending above the grate bar positioning post 102. Preferably, the top end of the grate bar positioning post 102 passes upward through the pressure plate 103 and is connected to a positioning nut.

[0041] Preferably, the flexible grate bar 2 includes long chain grate bars and short chain grate bars, which are arranged alternately in the middle opening of the grate frame 1 in a long-short-long or short-long-short manner.

[0042] Preferably, a support strip 104 is also provided in the central opening of the grate frame 1. The support strip 104 is located below the flexible grate bar 2 and is in perpendicular or cross contact with the flexible grate bar 2.

[0043] Preferably, a positioning ring or tube 105 is provided on the support bar 104 at the position corresponding to each flexible grate bar 2. Each flexible grate bar 2 must pass through its corresponding positioning ring or tube 105.

[0044] Preferably, the strip 2 through the positioning ring or circular tube 105 is a circular column, and the length of the circular column is greater than the axial length of the positioning ring or circular tube 105.

[0045] Example 1

[0046] like Figures 1-4 As shown, a flexible grate for a trolley includes a grate frame 1 and flexible grate bars 2. The grate frame 1 is a frame structure with an opening in the center, and the flexible grate bars 2 are metal chain structures. Multiple flexible grate bars 2 are laid flat in the central opening of the grate frame 1 in a parallel manner and fill the central opening.

[0047] Example 2

[0048] The embodiment 1 is repeated, except that the flexible grate 2 comprises a plurality of metal rings connected in series. The diameter of the hole in any one of the metal rings is 6 mm.

[0049] Example 2

[0050] Repeat Example 1, except that in all the flexible grate bars 2, the maximum gap between any two adjacent flexible grate bars 2 and the maximum gap between the flexible grate bar 2 located at the outer edge and the grate frame 1 is 5mm.

[0051] Example 3

[0052] Example 2 is repeated, except that the grate frame 1 is a quadrilateral frame structure formed by connecting four frame beams end to end. At least two frame beams of the quadrilateral frame structure are arranged in parallel with each other.

[0053] Example 4

[0054] Example 3 is repeated, except that the grate frame 1 is a trapezoidal frame structure with an opening in the middle. Mounting holes 101 are formed in a pair of frame beams of the trapezoidal frame structure that are parallel to each other. The grate frame 1 is arranged on the trolley through the mounting holes 101 and bolts.

[0055] Example 5

[0056] Example 4 is repeated, except that grate strip positioning columns 102 are arranged on both frame beams of the grate frame 1 that do not have mounting holes 101. Both ends of all flexible grate strips 2 are connected to the grate frame 1 through the grate strip positioning columns 102.

[0057] Example 6

[0058] Example 5 is repeated, except that a pressing plate 103 is further arranged on each grate strip positioning column 102. The pressing plate 103 has an L-shaped structure, one end of the pressing plate 103 is connected to the grate frame 1, and the other end extends above the grate strip positioning column 102.

[0059] Example 7

[0060] Example 6 is repeated, except that a positioning nut is connected to the top end of the grate strip positioning column 102 after passing through the pressing plate 103.

[0061] Example 8

[0062] Example 7 is repeated, except that the flexible grate strips 2 include long chain grate strips and short chain grate strips, and the long chain grate strips and the short chain grate strips are arranged in an alternating manner in the long-short-long manner in the opening in the middle of the grate frame 1.

[0063] Example 9

[0064] Example 8 is repeated, except that a support strip 104 is further arranged in the opening in the middle of the grate frame 1, and the support strip 104 is located below the flexible grate strips 2 and vertically contacts the flexible grate strips 2.

[0065] Example 10

[0066] Example 9 is repeated, except that a positioning ring or tube 105 is further arranged on the support strip 104 at a position corresponding to each flexible grate strip 2. Each flexible grate strip 2 needs to pass through the corresponding positioning ring or tube 105.

[0067] Example 11

[0068] Example 10 is repeated, except that the strip body of each flexible strip 2 that passes through the positioning ring or tube 105 is a circular strip post having a length greater than the axial length of the positioning ring or tube 105.

Claims

1. A flexible grating plate for a bogie, characterized by: The flexible grid plate comprises a grid plate frame (1) and a flexible grid bar (2); the grid plate frame (1) is a frame structure with an open middle part, and the flexible grid bar (2) is a metal chain structure; a plurality of the flexible grid bars (2) are installed in parallel with each other in the open middle part of the grid plate frame (1) and cover the open middle part.

2. The flexible screen according to claim 1, characterized in that: The flexible grid bar (2) comprises a plurality of metal round rings connected in series; the aperture of the ring hole of any one metal round ring is not greater than 8 mm.

3. The flexible screen according to claim 2, wherein: The aperture of the ring hole of any one metal round ring is 3-6 mm.

4. The flexible screen according to claim 1, wherein: In all the flexible grid bars (2), the maximum gap between any two adjacent flexible grid bars (2) and the maximum gap between the flexible grid bar (2) at the outer edge and the grid plate frame (1) are not greater than 8 mm.

5. The flexible grid according to claim 4, wherein: In all the flexible grid bars (2), the maximum gap between any two adjacent flexible grid bars (2) and the maximum gap between the flexible grid bar (2) at the outer edge and the grid plate frame (1) are 3-6 mm.

6. The flexible grid according to claim 1, wherein: The grid plate frame (1) is a quadrilateral frame structure formed by connecting four frame beams end to end; at least two of the four frame beams of the quadrilateral frame structure are arranged in parallel with each other.

7. The flexible grid according to claim 1, wherein: The grid plate frame (1) is a trapezoidal frame structure with an open middle part; a mounting hole (101) is formed on a pair of frame beams parallel to each other of the trapezoidal frame structure; the grid plate frame (1) is arranged on the trolley through the mounting hole (101) and bolts.

8. The flexible grid according to claim 7, wherein: A grid bar positioning column (102) is arranged on each of the two frame beams of the grid plate frame (1) which are not provided with the mounting hole (101); both ends of all the flexible grid bars (2) are connected to the grid plate frame (1) through the grid bar positioning column (102).

9. The flexible grid according to claim 8, wherein: A pressing plate (103) is further arranged on each of the grid bar positioning columns (102); the pressing plate (103) is an L-shaped structure, one end of the pressing plate (103) is connected to the grid plate frame (1), and the other end of the pressing plate (103) extends above the grid bar positioning column (102).

10. The flexible grid according to claim 9, wherein: A positioning nut is connected to the top end of the grid bar positioning column (102) after penetrating through the pressing plate (103).

11. The flexible grid of claim 8, wherein: The flexible grid bar (2) comprises long chain grid bars and short chain grid bars, and the long chain grid bars and the short chain grid bars are arranged in an alternating manner of long-short-long or short-long-short in the open middle part of the grid plate frame (1).

12. The flexible grid according to any one of claims 1-11, wherein: A support bar (104) is further arranged in the open middle part of the grid plate frame (1), and the support bar (104) is located below the flexible grid bar (2) and vertically or transversely contacts the flexible grid bar (2).

13. The flexible screen according to claim 12, wherein: A positioning round ring or round tube (105) is further arranged on the support bar (104) at a position corresponding to each flexible grid bar (2); each flexible grid bar (2) needs to penetrate through the corresponding positioning round ring or round tube (105).

14. The flexible grid according to claim 13, wherein: The bar body of each flexible grid bar (2) penetrating through the positioning round ring or round tube (105) is a circular column, and the length of the circular column is greater than the axial length of the positioning round ring or round tube (105).

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