CN218764556U

CN218764556U - Improved generation sintering pallet grid section

Info

Publication number: CN218764556U
Application number: CN202223105084.4U
Authority: CN
Inventors: 边明茹
Original assignee: Gansu Western Heavy Industry Co ltd Of Jisco
Current assignee: Gansu Western Heavy Industry Co ltd Of Jisco
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-03-28
Anticipated expiration: 2032-11-23

Abstract

The utility model discloses an improved generation sintering pallet grid section relates to iron and steel smelting equipment technical field. The utility model discloses a grid section, grid section include string leg, main part and support location end, and the bottom at main part both ends all is fixed with the string leg, and the both ends of main part all are fixed with support location end, and the wind-guiding groove has all been seted up to the inside at main part top both ends, and the inside middle part in main part top is provided with the clearance, supports the both sides on location end top and has seted up first clearance location face and second clearance location face respectively. The utility model discloses a set up the air channel with the locating surface of the support location end of sintering pallet grid section, increased the gas permeability of pallet grid section both ends upside ore, avoided the wind-guiding blind area, improved the quality and the output of pallet both ends sintering deposit, it is trapezoidal to change the square change in string leg cross-section into simultaneously, has increased grid section intensity, and string leg and body combination position set up the circular arc transition and avoid stress concentration.

Description

Improved generation sintering pallet grid section

Technical Field

The utility model belongs to the technical field of steel smelting equipment, especially, relate to an improved generation sintering pallet grid section.

Background

The grate bars are main wearing parts on a sintering machine trolley of a steel enterprise, and have large quantity and high manufacturing cost; a plurality of rows of closely adjacent grid bars are generally arranged at the bottom of the sintering pallet, a heat insulation pad is arranged between each grid bar and a main beam of the sintering pallet, the mixed materials are stacked on the grid bars, and sintering hot air passes through gaps between the grid bars in the sintering process; when one grid section is broken and partially falls off, local leakage can be caused; after the grate bars are broken and partially detached, the rest part of the grate bars can be loosened, when the trolley runs to the annular curved rail of the sintering machine to turn, the loosened grate bars can slide and incline, so that a plurality of adjacent grate bars are loosened and scattered in an avalanche mode, the bottom of the trolley of the sintering machine is hollowed out, the trolley needs to be stopped, the furnace grate bars need to be replenished again, and the normal operation of the sintering machine is seriously influenced; the quality of the grate structure not only influences the service life of the grate structure, but also influences the service life of the trolley.

The grid section of current product is including hanging the leg, the main part, support location end and wind-guiding groove, support the location end and set up at the main part both ends, the grid section is installed on the platform truck girder that has the heat insulating mattress, the clearance locating surface of grid section support location end, the clearance size between the mutual contact assurance grid section main part of each other, guarantee sintering hot-blast ventilation and sintering ore grain and do not fall into the grid section below, it has its advantage, the use has played its effect on the sintering machine platform truck, but still there is the following problem at present:

the sintering machine trolley grate is cast by adopting heat-resistant high-chromium cast iron RTCr26Ni, and the national standard comprises the following chemical components: 1.6 to 2.2 percent of C, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, 25 to 27 percent of Cr and 0.8 to 1.2 percent of Ni, and the unstable quality and the service life of the product is only 1 year due to large component range.

The cross section of the hanging leg of the grate bar is square, the connecting surface of the upper end of the hanging leg and the lower end of the main body is a straight surface, the structure has defects, stress is generated after processing and casting, the grid bar is easy to break, and the service life of the grate bar is shortened.

The lightening holes of the grate bar hanging legs are difficult to mold and remove sand during casting, so that the casting process difficulty and cost are increased, and the quality is reduced.

The C-shaped groove part of the grate bar hanging leg is in surface contact with the contact surface of the heat insulation pad, so that the contact area of the grate bar is large, the heat conduction amount is large, the service life of a heat insulation sheet and a trolley is shortened, the movement between the grate bar and the trolley is not facilitated, and the degree of freedom is insufficient.

The clearance positioning surface of the grate bar supporting and positioning end has large contact area and no ventilation groove, so that the ventilation effect of the upper part of the grate bar supporting and positioning end is poor, and the yield and the quality of sinter are influenced;

to this end, an improved sintering pallet grid has been devised to provide another solution to the above mentioned technical problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an improved generation sintering pallet grid section to solve the problem that proposes among the above-mentioned background art.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme: the improved sintering trolley grate comprises a grate, wherein the grate comprises hanging legs, a main body and supporting and positioning ends, the hanging legs are fixed to the bottoms of the two ends of the main body, the supporting and positioning ends are fixed to the two ends of the main body, and air guide grooves are formed in the two ends of the top of the main body.

Furthermore, a gap is formed in the middle of the inside of the top end of the main body, and a first gap positioning surface and a second gap positioning surface are respectively formed in two sides of the top end of the supporting and positioning end.

Furthermore, ventilation grooves are formed in the inner portions, far away from one end of each of the first gap positioning surface and the second gap positioning surface, and each ventilation groove comprises a vertical ventilation groove and a transverse ventilation groove, the vertical ventilation grooves are communicated with the transverse ventilation grooves, and the transverse ventilation grooves are connected with the air guide grooves.

Further, the cross section of the hanging leg is trapezoidal.

Furthermore, the joint part of the trapezoidal top and the main body is provided with an arc connecting surface.

Further, a heat insulation pad is fixed at the bottom end of the supporting and positioning end, and a trolley beam is arranged on the inner side of the bottom end of the heat insulation pad.

Furthermore, a first side surface is arranged on one side of each hanging leg, the first side surface is a 90-degree arc, the first side surface is in line contact with the heat insulation pad, a second side surface is arranged on the other side of each hanging leg, the second side surface is square, and round corners are arranged at two ends, far away from the first side surface, of the second side surface.

The utility model discloses following beneficial effect has:

1. the utility model discloses the locating surface of the support location end of sintering pallet grid section sets up the ventilation groove, has increased the gas permeability of the upside ore in pallet grid section both ends, has avoided the wind-guiding blind area, has improved the quality and the output of pallet both ends sintering deposit;

2. the square section of the hanging leg of the utility model is changed into a trapezoid, thereby increasing the strength of the grid section, and the combination part of the hanging leg and the body is provided with a circular arc transition to avoid stress concentration; the holes in the middle of the hanging legs are replaced by solid holes, so that the casting quality and efficiency are improved;

3. the utility model discloses change the shank side into 90 degrees circular arcs, be line contact with the heat insulating mattress contact surface, the heat that the heat insulating mattress was given to after the contact surface reduces, has improved the life-span of heat insulating mattress and platform truck body.

Drawings

FIG. 1 is a front view of the grid of the present invention;

FIG. 2 is a left side view of the grid of the present invention;

FIG. 3 is a cross-sectional view of the grate hanging leg of the present invention;

fig. 4 is a top view of the combination of two grate bars of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

2. grid section; 21. hanging legs; 211. a trapezoid shape; 212. round corners; 213. a first side surface; 214. a second side surface; 22. a main body; 23. supporting a positioning end; 231. a first gap locating surface; 232. a second gap locating surface; 2311. a ventilation slot; 23111. a vertical ventilation slot; 23112. a transverse ventilation slot; 24. a wind guide groove; 25. a circular arc connecting surface; 3. a trolley beam; 4. a heat insulating pad; 5. a gap.

Detailed Description

Referring to fig. 1-4, the utility model relates to an improved sintering pallet grid, which comprises a grid 2, wherein the grid 2 comprises hanging legs 21, a main body 22 and supporting and positioning ends 23, the bottom of the two ends of the main body 22 are respectively fixed with the hanging legs 21, the two hanging legs 21 are symmetrically fixed, the two ends of the main body 22 are respectively fixed with the supporting and positioning ends 23, and the insides of the two ends of the top of the main body 22 are respectively provided with an air guide groove 24; the middle part of the inside of the top end of the main body 22 is provided with a gap 5, two sides of the top end of the supporting and positioning end 23 are respectively provided with a first gap positioning surface 231 and a second gap positioning surface 232, and the first gap positioning surface 231 and the second gap positioning surface 232 are symmetrical and the tops of the first gap positioning surface 231 and the second gap positioning surface 232 are in mutual contact, so that the size of the gap 5 between the main bodies 22 of the improved grid 2 is ensured through the mutual contact between the first gap positioning surface 231 and the second gap positioning surface 232; the first gap positioning surface 231 and the second gap positioning surface 232 are provided with ventilation grooves 2311 in the ends far away from each other, each ventilation groove 2311 consists of a vertical ventilation groove 23111 and a transverse ventilation groove 23112, the vertical ventilation grooves 23111 are communicated with the transverse ventilation grooves 23112, and the transverse ventilation grooves 23112 are connected with an air guide groove 24, so that air sucked by a fan increases the air permeability of ore on the upper side of the supporting and positioning end 23 of the trolley grate bar 2 along the direction shown by an arrow, an air guide blind area is avoided, and the quality and the yield of sintering ore at two ends of the trolley are improved; the cross section of the hanging leg 21 is trapezoidal 211, so that the strength of the grate bar 2 can be increased, the weight is reduced, and the arc connecting surface 25 of R30-R50 is arranged at the joint of the top of the trapezoidal 211 and the main body 22, so that stress concentration is avoided; the hanging legs 21 are solid integrally, so that the difficulty of sand removal and molding is avoided, and the casting quality and efficiency are improved; the bottom end of the supporting and positioning end 23 is fixed with a heat insulation pad 4, the inner side of the bottom end of the heat insulation pad 4 is provided with a trolley beam 3, one side of the hanging leg 21 is provided with a first side surface 213, the first side surface 213 is in a 90-degree arc shape, the first side surface 213 is in line contact with the heat insulation pad 4, after the contact surface is reduced, the heat dissipation area of one grid section 2 is increased, the ventilation area is increased, the heat dissipation effect is good, the heat transferred to the heat insulation pad 4 is reduced, the service lives of the heat insulation pad 4 and the trolley body are prolonged, the other side of the hanging leg 21 is provided with a second side surface 214, the second side surface 214 is in a square shape, and two ends of one side, away from the first side surface 213, of the second side surface 214 are provided with fillets 212 with the size of R3-R5 for transition.

Preferably, both ends of the second side surface 214 on the side away from the first side surface 213 are provided with rounded corners 212 with a size R3.

Preferably, the grid 2 is made of heat-resistant high-chromium cast iron, and the chemical component range is controlled as follows: 2.0 to 2.2 percent of C, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, 25 to 27 percent of Cr, 1.0 to 1.2 percent of Nie, and trace rare earth elements are added; after the chemical component range is changed, the grate bar has stable performance and improved hardness, the service life reaches 3 years at present, the overhaul time is shortened, and the cost is reduced.

Claims

1. The utility model provides an improved generation sintering pallet grid section which characterized in that: the novel grate comprises a grate bar (2), wherein the grate bar (2) comprises hanging legs (21), a main body (22) and supporting and positioning ends (23), the hanging legs (21) are fixed at the bottoms of the two ends of the main body (22), the supporting and positioning ends (23) are fixed at the two ends of the main body (22), and air guide grooves (24) are formed in the two ends of the top of the main body (22).

2. An improved pallet grate as claimed in claim 1 wherein: the middle part of the inside of the top end of the main body (22) is provided with a gap (5), and two sides of the top end of the supporting and positioning end (23) are respectively provided with a first gap positioning surface (231) and a second gap positioning surface (232).

3. An improved pallet grate as claimed in claim 2 wherein: the first gap positioning surface (231) and the second gap positioning surface (232) are both provided with ventilation grooves (2311) in the inner parts at the ends far away from each other, each ventilation groove (2311) is composed of a vertical ventilation groove (23111) and a transverse ventilation groove (23112), the vertical ventilation groove (23111) is communicated with the transverse ventilation groove (23112), and the transverse ventilation groove (23112) is connected with the air guide groove (24).

4. An improved pallet grate as claimed in claim 1 wherein: the cross section of the hanging leg (21) is trapezoidal (211).

5. An improved sintering pallet grate bar as in claim 4 wherein: and an arc connecting surface (25) is arranged at the joint of the top of the trapezoid (211) and the main body (22).

6. An improved pallet grate as claimed in claim 1 wherein: the bottom end of the supporting and positioning end (23) is fixed with a heat insulation pad (4), and the inner side of the bottom end of the heat insulation pad (4) is provided with a trolley beam (3).

7. An improved pallet grate as claimed in claim 6 wherein: the heat insulation pad is characterized in that a first side surface (213) is arranged on one side of the hanging leg (21), the first side surface (213) is a 90-degree arc, the first side surface (213) is in line contact with the heat insulation pad (4), a second side surface (214) is arranged on the other side of the hanging leg (21), the second side surface (214) is square, and round corners (212) are arranged at two ends of one side, far away from the first side surface (213), of the second side surface (214).