CN209829234U

CN209829234U - Grate for fixed sieve and fixed sieve

Info

Publication number: CN209829234U
Application number: CN201920180843.2U
Authority: CN
Inventors: 毛志宏
Original assignee: Benxi Iron And Steel (group) Mining Co Ltd; Bengang Steel Plates Co Ltd
Current assignee: Benxi Iron And Steel (group) Mining Co Ltd; Bengang Steel Plates Co Ltd
Priority date: 2019-02-01
Filing date: 2019-02-01
Publication date: 2019-12-24
Anticipated expiration: 2029-02-01

Abstract

The utility model provides a grate bar of fixed sieve on one hand, including the grate bar body, the grate bar body includes the wearing parts of top, and welds the installation department below the wearing parts, the upper surface of wearing parts is the sifter, the fixed sieve crossbeam is connected to the installation department both sides, the width of wearing parts is greater than the installation department, the grate bar body cross-section is T type symmetrical structure; the utility model discloses another aspect provides a fixed sieve, fixed sieve includes a plurality of above-mentioned grates and crossbeam one, crossbeam two, one side bottom welding couple of grate installation department, the couple matches with the shape phase of crossbeam one, and this couple articulates on crossbeam one, the opposite side bottom welding of grate installation department is on crossbeam two. The grate and the fixed sieve of the structure of the utility model have the characteristics of difficult blockage, wear resistance, long service life and convenient maintenance.

Description

Grate for fixed sieve and fixed sieve

Technical Field

The utility model relates to a mining equipment technical field, concretely relates to fixed sieve grate and fixed sieve.

Background

The fixed sieve is used as pre-screening equipment and is mainly applied to coarse crushing and medium crushing; if a fixed sieve such as a grizzly screen and a bar screen is arranged in front of the crusher, products under the sieve can be crushed again without the crusher, so that the ore amount entering the crusher can be reduced, and the processing capacity of the crusher is improved. At the present stage, the screen surface of the fixed screen is a bar screen, the cross section of the screen bar is usually square or inverted trapezoid, and the screen bar of the fixed screen is usually in a single body type, namely, one screen bar is processed by a directly cast blank. By adopting the processing technology, the cost is relatively low, but the technological performance cannot be ensured, especially the domestic heat treatment technology is immature, the wear resistance, impact toughness and weldability of the screen bar cannot be ensured at the same time, and the service life of the main wear part is less than 3 months without considering the technology; while the following problems generally exist during the use of fixed screens: the screen surface of the fixed screen is easy to block, and the grading effect is poor; after the inverted trapezoidal screen bars are used for a period of time, due to abrasion, screen holes become wide, the screening effect is influenced, replacement is needed in advance, and the service life of spare parts is short; during maintenance, the maintenance operation time of the welded sieve bars is long, and meanwhile due to the requirement of welding performance, the wear resistance of the sieve bars is often extremely poor, and the replacement period of main wear parts of the sieve surface is short.

SUMMERY OF THE UTILITY MODEL

The technical task of the utility model is to provide a fixed sieve grate to the not enough of prior art above to and use the fixed sieve of this grate, have difficult jam, wear-resisting, long service life, overhaul convenient characteristics.

The utility model provides an aspect provides a fixed sieve grate, including the grate body, the grate body includes the wearing parts of top to and the installation department of welding below the wearing parts, the upper surface of wearing parts is the sifter, fixed sieve crossbeam is connected to the installation department both sides, the width of wearing parts is greater than the installation department, grate body cross-section is T type symmetrical structure.

Further, the sections of the wear-resistant part and the mounting part are square.

Further, the wear-resisting part adopts the preparation of multipurpose antifriction plate, the installation department adopts the carbon steel preparation.

The utility model discloses another aspect provides a fixed sieve, fixed sieve includes a plurality of above-mentioned grates and crossbeam one, crossbeam two, one side bottom welding couple of grate installation department, the couple matches with the shape phase of crossbeam one, and this couple articulates on crossbeam one, the opposite side bottom welding of grate installation department is on crossbeam two.

Furthermore, the grid bars are arranged in parallel and fixed on the first cross beam and the second cross beam at equal intervals.

Furthermore, a baffle is arranged on the first cross beam on two sides of the grate bar hanging end and used for limiting the grate bar hanging end to move left and right.

The utility model has the advantages that:

1. the fixed sieve grate adopts a T-shaped structure, and the width of the upper part is larger than that of the lower part, so that the ore passing effect can be ensured, the fixture block is avoided, and the separation efficiency is further ensured;

2. the T-shaped sieve bars can also avoid the change of sieve pores caused by abrasion, the cross section of the upper part of the grate bar is square, and the size of the strip-shaped sieve pores can not change when the grate bar is normally abraded, so that the bad influence of spare part abrasion on the production process can be avoided;

3. the grate in the structure of the utility model is divided into a wear-resistant part at the upper part and an installation part at the lower part, the upper part adopts a multipurpose wear-resistant plate, the wear-resistant performance is good, and the service life of spare parts can be effectively prolonged; the lower part adopts high-quality carbon steel with good welding performance and good toughness, so that the process of welding the grate bars on the cross beam can be omitted when the grate bars are installed on the fixed screen, and the grate bar hanging process can be further selected, so that the grate bar hook does not need to be cast, the welding process can be completely adopted, the embarrassment that a plurality of kinds of spare parts need to be prepared due to the diversity of screening equipment is avoided, and the overhauling efficiency is ensured; meanwhile, the hanging process can avoid danger caused by welding in a closed space during maintenance, and the maintenance time is reduced.

4. The utility model discloses antifriction plate is chooseed for use on the castor bean strip upper portion of structure, but the lower part adopts carbon steel of relatively low price, has guaranteed the wearability of castor bean strip, and impact toughness and weldability have practiced thrift the cost for the whole castor bean strips that adopt the antifriction plate simultaneously.

Drawings

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

FIG. 2 is a schematic view of the cross-sectional structure of the grid of the present invention;

FIG. 3 is a schematic top view of the fixed screen of the present invention;

fig. 4 is a schematic view of the installation structure of the grate of the fixed screen of the utility model.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Examples

The utility model discloses the fixed sieve grate of structure, as shown in fig. 1, 2, including grate body 1, the grate body includes wearing parts 2 of top to and the welding is at installation department 3 of wearing parts below, the upper surface of wearing parts is the sifter, fixed sieve crossbeam is connected to the installation department both sides, the width of wearing parts is greater than the installation department, grate body cross-section is T type symmetrical structure.

Further, for normal wearing and tearing, the size change can not take place for the sieve mesh of bar, the cross-section of wearing parts and installation department is square.

Furthermore, in order to ensure the wear resistance and the welding performance of the grate bars, the wear-resistant part is made of a multipurpose wear-resistant plate, and the mounting part is made of carbon steel.

The fixed sieve with the structure of the utility model is shown in figures 3 and 4, and comprises a plurality of grate bars, a first cross beam 4 and a second cross beam 5, wherein a hook 6 is welded at the bottom of one side of the grate bar mounting part, the hook is matched with the first cross beam in shape, the hook is connected with the first cross beam in a hanging manner, and the bottom of the other side of the grate bar mounting part is welded on the second cross beam; the fixed screen also comprises guardrails 8 arranged at two sides of the fixed screen body.

Furthermore, the grate bars are arranged in parallel and fixed on the first cross beam and the second cross beam at equal intervals, and when two ends of the grate bars are fixed with the first cross beam and the second cross beam, a part of positions are reserved for convenient maintenance.

Furthermore, a baffle 7 is arranged on a cross beam I on two sides of the grid bar hanging end, and the baffle is used for limiting the grid bar hanging end to move left and right and is matched with the dead weight of the grid bar to fix the grid bar.

In this embodiment, the screen bar size is calculated according to the operating conditions, i.e., the machine hour efficiency, the ore fall, the ore hardness, the ore particle size, the blanking point, the beam position, and the like. Selecting a proper screen bar size by an empirical formula, wherein the maximum efficiency of a certain ore crushing operation area is 950T/H, the maximum granularity is 330mm, the fall is 2.2M, selecting screen bars of 80mm multiplied by 120mm multiplied by 4600mm according to the empirical formula (the data is the result after the material optimization), the upper wear-resistant part is widened by 20mm compared with the lower mounting part, the upper wear-resistant part adopts a square section of 40mm multiplied by 100mm, and the lower mounting part adopts a square section of 80mm multiplied by 80 mm; guaranteed the ore and passed through the effect, avoided the fixture block, further guaranteed branch efficiency, when also guaranteeing normal wearing and tearing simultaneously, the size change can not take place for the sieve mesh of bar to this avoids spare parts wearing and tearing to production technology's influence.

When the fixed sieve is used, the inclination angle of the fixed sieve is set according to the properties (viscosity, humidity and the like) of ores, and after a grate bar is subjected to a machine test for 18 months by the fixed sieve in a certain ore crushing operation area, the grate bar can still be used and is not worn to the limit; in sum, the service life of spare parts of the fixed sieve grid bars is prolonged by about 15 months.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fixed sieve grate is characterized in that: including the castor bean strip body, the castor bean strip body includes the wearing parts of top to and the installation department of welding below the wearing parts, the upper surface of wearing parts is the sifter, fixed sieve crossbeam is connected to the installation department both sides, the width of wearing parts is greater than the installation department, castor bean strip body cross-section is T type symmetrical structure.

2. A stationary screen grate according to claim 1, characterized in that: the sections of the wear-resistant part and the mounting part are square.

3. A stationary screen grate according to claim 1, characterized in that: the wear-resisting portion is made of a multipurpose wear-resisting plate, and the mounting portion is made of carbon steel.

4. A fixed screen, its characterized in that: the fixed screen comprises a plurality of grates as defined in any one of claims 1 to 3, a first cross beam and a second cross beam, hooks are welded to the bottom of one side of the grate mounting portion, the hooks are matched with the first cross beam in shape, the hooks are connected to the first cross beam in a hanging manner, and the bottom of the other side of the grate mounting portion is welded to the second cross beam.

5. A fixed screen as claimed in claim 4, wherein: the grate bars are arranged in parallel and fixed on the first cross beam and the second cross beam at equal intervals.

6. A fixed screen as claimed in claim 4, wherein: and the first cross beams on two sides of the grate bar hanging end are provided with baffle plates, and the baffle plates are used for limiting the grate bar hanging end to move left and right.