Movable grate sieve

Abstract

The utility model discloses a movable grate screen, which relates to the technical field of coke grading screening and comprises a main body frame, and a plurality of fixed grate bars are longitudinally arranged on the main body frame at intervals in parallel; one end of the movable frame is rotationally connected with the main body frame, a plurality of movable grid sections which are arranged in parallel at intervals are longitudinally arranged on the movable frame, and each movable grid section is arranged between the adjacent fixed grid sections; and the telescopic piece is arranged on the supporting seat, is rotationally connected with the other end of the movable frame, and can enable the movable frame to reciprocate in the vertical direction. The movable grate bar screen solves the technical problem of high risk of manual cleaning by post personnel, and achieves the technical effect of reducing the risk of manual cleaning of blockage.

Description

Technical Field

[0001] This utility model relates to the field of coke grading and screening technology, and in particular to a movable grate screen. Background Technology

[0002] In the smelting process of blast furnace ironmaking, metallurgical coke, as a key reducing agent and heat energy provider, has a decisive impact on blast furnace operating efficiency and product quality due to its quality and supply stability. After being processed in the coke oven, metallurgical coke needs to be cut into sizes that meet the requirements of blast furnace smelting by a coke cutter, and then screened and graded to ensure that the metallurgical coke entering the blast furnace has uniform particle size and meets the requirements of the smelting process.

[0003] However, in actual operation, grate screens face many challenges, the most prominent of which is clogging. Due to differences in the physical properties of metallurgical coke (such as particle size, hardness, and moisture content) and improper maintenance, metallurgical coke easily accumulates and clogs the grate screen surface, which not only affects screening efficiency but may also lead to interruptions in subsequent processes, seriously affecting the continuity and stability of the production line.

[0004] Traditional solutions to the problem of clogged grate screens rely on manual cleaning by personnel. However, this method poses numerous safety hazards and health risks. When cleaning clogged metallurgical coke, personnel must stand directly on the screen surface, which is often covered with slippery metallurgical coke dust, making it extremely easy to slip, fall, or suffer injuries.

[0005] Therefore, how to provide a movable grate screen to reduce the risk of clogging during manual cleaning is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a movable grate screen that solves the technical problem of high risk associated with manual cleaning by personnel.

[0007] To achieve the above objectives, this utility model provides a movable grate screen, comprising:

[0008] The main frame has multiple fixed gratings arranged longitudinally and spaced parallel to each other.

[0009] A movable frame, one end of which is rotatably connected to the main frame, and multiple movable gratings arranged longitudinally and spaced parallel on the movable frame, each movable grating being disposed between adjacent fixed gratings;

[0010] The telescopic component is located on the support base and is rotatably connected to the other end of the movable frame, allowing the movable frame to reciprocate in the vertical direction.

[0011] Preferably, the fixed grate bars are mounted on the main frame via a first support block, and the movable grate bars are mounted on the movable frame via a second support block.

[0012] Preferably, the main frame and the movable frame are rotatably connected by a hinge shaft.

[0013] Preferably, the output end of the telescopic component is provided with a first connecting sleeve, and the movable frame is provided with a second connecting sleeve, wherein the first connecting sleeve and the second connecting sleeve are connected by a rotating shaft.

[0014] Preferably, the connection between the rotating shaft and the main frame is a detachable connection.

[0015] Preferably, the telescopic component is a hydraulic cylinder or an electric push rod.

[0016] Preferably, a limit switch is provided on the telescopic member to limit the movement stroke of the output end of the telescopic member.

[0017] Preferably, both the fixed grate bar and the movable grate bar have a wear-resistant layer on their surfaces.

[0018] Compared to the aforementioned background technology, the movable grate screen provided in this application of the present utility model has the following characteristics: when the telescopic component retracts downward, the movable frame descends a certain distance, and the metallurgical coke accumulated on the screen surface of the grate screen falls through the gap between the descending movable grate bars. Then, the telescopic component returns to its initial position so that the movable frame is in its initial position, thereby reducing the risk of blockage due to manual cleaning. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 A schematic diagram of the movable grate screen structure provided in an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the connection of the fixed grate bars provided in an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the connection of the movable grate bars provided in an embodiment of the present utility model.

[0023] in:

[0024] 1-Main frame, 2-Fixed grate bar, 3-Modible frame, 4-Modible grate bar, 5-Telescopic component, 6-First support block, 7-Second support block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] See Figures 1-3 This application provides a movable grate screen, comprising a main frame 1, with multiple fixed grate bars 2 arranged longitudinally and spaced parallel to each other on the main frame 1; a movable frame 3, one end of which is rotatably connected to the main frame 1, with multiple movable grate bars 4 arranged longitudinally and spaced parallel to each other on the movable frame 3, each movable grate bar 4 being disposed between adjacent fixed grate bars 2; and a telescopic member 5, disposed on a support base (not shown in the attached figure), rotatably connected to the other end of the movable frame 3, which allows the movable frame 3 to reciprocate in the vertical direction.

[0028] In other words, the main frame 1 is the supporting structure of the entire screening equipment. The main frame 1 has multiple fixed grate bars 2 arranged longitudinally and parallel to each other. The movable frame 3 is connected to the main frame 1 by a rotating connection. The movable frame 3 also has multiple movable grate bars 4 arranged longitudinally and parallel to each other. The movable grate bars and fixed grate bars are arranged alternately to enhance the screening effect and make the screen more flexible, so as to adapt to materials of different particle sizes and properties. The size and spacing of the fixed grate bars 2 and the movable grate bars 4 are determined according to the particle size and requirements of the material to be screened.

[0029] The telescopic component 5 is mounted on the support base and located on the outside of the movable frame 3. The telescopic component 5 is connected to the other end (i.e., the bottom) of the movable frame 3 by a rotatable connection. When the telescopic component 5 is working, it can push or pull the movable frame 3 to reciprocate in the vertical direction.

[0030] In summary, the movable grate screen provided in this application allows the movable frame 3 to descend a certain distance when the telescopic member 5 retracts downwards, causing the metallurgical coke accumulated on the screen surface to fall through the gaps between the descending movable grate bars 4. Then, the telescopic member 5 returns to its initial position so that the movable frame 3 is in its initial position, thereby reducing the risk of blockage due to manual cleaning.

[0031] Based on the above embodiments, the fixed grate bar 2 is set on the main frame 1 through the first support block 6, the movable grate bar 4 is set on the movable frame 3 through the second support block 7, and the main frame 1 and the movable frame 3 are rotatably connected by a hinge shaft.

[0032] Specifically, the main frame 1 is fixedly provided with multiple parallel and spaced fixed grate bars 2 via the first support block 6. The movable frame 3 is rotatably connected to the main frame 1 via a hinge shaft, allowing it to reciprocate in the vertical direction. The movable frame 3 is fixedly provided with multiple parallel and spaced movable grate bars 4 via the second support block 7. The movable grate bars 4 and the fixed grate bars 2 are arranged alternately to enhance the screening effect and adapt to materials of different particle sizes and properties. The hinge shaft is used to connect the main frame 1 and the movable frame 3, allowing the movable frame 3 to rotate relative to the main frame 1 in the vertical direction.

[0033] Based on the above embodiments, a first connecting sleeve is provided at the output end of the telescopic component 5, and a second connecting sleeve is provided on the movable frame 3. The first connecting sleeve and the second connecting sleeve are connected by a rotating shaft.

[0034] Specifically, the first connecting sleeve is fixedly connected to the output end of the telescopic component 5, which can be achieved by welding, threaded connection, pin connection, etc. The second connecting sleeve is fixedly connected to the movable frame 3, which can also be achieved by welding, threaded connection, pin connection, etc.

[0035] The shaft is inserted into the inner hole of the first and second connecting sleeves and fixed by appropriate locking devices (such as nuts, locking pins, etc.) to ensure the reliability and stability of the connection.

[0036] Based on the above embodiments, the connection between the rotating shaft and the main frame 1 is a detachable connection. That is, under normal circumstances, the rotating shaft is fixed to the main frame 1 with fixing bolts. When metallurgical coke accumulates on the screen surface of the grate screen, the fixing bolts are removed.

[0037] Based on the above embodiments, the telescopic component 5 is a hydraulic cylinder or an electric push rod; a limit switch is provided on the telescopic component 5 to limit the movement stroke of the output end of the telescopic component 5; and a wear-resistant layer is provided on the surfaces of both the fixed grate bar 2 and the movable grate bar 4.

[0038] In other words, the telescopic component 5 is either a hydraulic cylinder or an electric push rod, both of which have good driving force and stability, and can meet the reciprocating motion requirements of the screening equipment. The hydraulic cylinder generates driving force by compressing and releasing hydraulic oil, and has the characteristics of great power and smooth movement. The electric push rod achieves reciprocating motion by being driven by an electric motor, and has the characteristics of simple structure and easy control. Therefore, it can be selected according to actual needs.

[0039] A limit switch is provided on the telescopic component 5 to limit the movement stroke of the output end of the telescopic component 5. The limit switch is a commonly used position detection device. When the telescopic component 5 moves to the preset position, the limit switch will send a signal to stop the telescopic component 5 from moving or change the direction of movement. In this embodiment, the control of the sinking distance of the movable frame is 100mm.

[0040] A wear-resistant layer is provided on the surface of both the fixed grate bar 2 and the movable grate bar 4. The wear-resistant layer is a material with high strength and wear resistance, which can protect the surface of the grate bar from material wear and corrosion. By setting the wear-resistant layer, the service life of the grate bar can be extended, maintenance and replacement costs can be reduced, and screening efficiency and accuracy can be improved.

[0041] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0042] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A movable grate screen, characterized in that, include: The main frame (1) has multiple fixed grating bars (2) arranged longitudinally and spaced in parallel. The movable frame (3) is rotatably connected to the main frame (1) at one end. Multiple movable grating bars (4) are arranged longitudinally and spaced parallel to each other on the movable frame (3). Each movable grating bar (4) is arranged between adjacent fixed grating bars (2). The telescopic component (5) is set on the support base and is rotatably connected to the other end of the movable frame (3), which allows the movable frame (3) to reciprocate in the vertical direction.

2. The movable grate screen according to claim 1, characterized in that, The fixed grate bar (2) is mounted on the main frame (1) via the first support block (6), and the movable grate bar (4) is mounted on the movable frame (3) via the second support block (7).

3. The movable grate screen according to claim 2, characterized in that, The main frame (1) and the movable frame (3) are rotatably connected by a hinge shaft.

4. The movable grate screen according to claim 1, characterized in that, The output end of the telescopic component (5) is provided with a first connecting sleeve, and the movable frame (3) is provided with a second connecting sleeve. The first connecting sleeve and the second connecting sleeve are connected by a rotating shaft.

5. The movable grate screen according to claim 4, characterized in that, The connection between the rotating shaft and the main frame (1) is a detachable connection.

6. The movable grate screen according to claim 1, characterized in that, The telescopic component (5) is a hydraulic cylinder or an electric push rod.

7. The movable grate screen according to claim 1, characterized in that, A limit switch is provided on the telescopic member (5) to limit the movement stroke of the output end of the telescopic member (5).

8. The movable grate screen according to claim 1, characterized in that, The surfaces of both the fixed grate bar (2) and the movable grate bar (4) are provided with a wear-resistant layer.

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