A slag iron screening device for a cast iron machine head wheel
By designing a slag and iron separation device that combines movable and fixed screen plates on the head wheel of a cast iron mill, the problems of low slag and iron separation efficiency and production continuity in traditional cast iron production have been solved, achieving efficient and automated slag and iron separation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUANGSHI XINXING PIPES CO LTD
- Filing Date
- 2025-08-28
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional cast iron production suffers from low slag-iron separation efficiency, incomplete screening, high labor intensity, and traditional screening equipment cannot adapt to insufficient iron content or fluctuations in the slag-iron ratio during the initial casting stage, affecting production continuity and equipment adaptability.
A slag and iron screening device for cast iron die head wheels was designed. It adopts a combination of movable and fixed screen plates. The movable screen plate is driven to tilt by an electro-hydraulic actuator to achieve multi-stage screening. Combined with gravity flow, it can adapt to fluctuations in the slag and iron ratio and insufficient iron content in the early stage of casting, and reduce manual intervention.
It achieves efficient separation of slag and iron, improves screening efficiency and accuracy, ensures production continuity, reduces manual intervention, and improves the level of automation.
Smart Images
Figure CN224525207U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of iron casting machine manufacturing technology, specifically a slag and iron screening device for the head wheel of an iron casting machine, which is suitable for efficient screening and collection of iron slag in pig iron blocks during the casting process of an iron casting machine. Background Technology
[0002] In the cast iron production process, pig iron blocks after casting by the casting machine are often mixed with incompletely separated slag and iron particles. Traditional processes rely heavily on manual labor or forklifts for secondary screening, resulting in low iron-slag separation efficiency, incomplete screening, and high labor intensity. Currently, qualified iron blocks and waste slag are mixed and piled up in the pig iron silo, requiring secondary screening on a fixed screening device using a forklift, which wastes resources and increases subsequent processing costs. Furthermore, in the initial minutes of casting, the iron quantity is insufficient, resulting in an excessive proportion of flaky iron blocks. These flaky iron blocks are defective and cannot pass through the sieve. Traditional screening equipment, with its fixed structure and poor flexibility, cannot adapt to the conditions of insufficient iron quantity or fluctuating slag-iron ratios in the initial casting stage, affecting production continuity and equipment adaptability. To address these industry pain points, there is an urgent need to develop a screening device with adjustable screening angle, precise slag-iron separation, and easy operation to improve screening efficiency, reduce manual intervention, and meet the demands of modern cast iron production for high efficiency and intelligence. Summary of the Invention
[0003] The purpose of this invention is to address the problems existing in the prior art by providing a slag and iron screening device for cast iron head wheels.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A slag and iron screening device for cast iron head wheels includes an I-beam vertical frame and an inclined frame disposed on the inclined surface of the I-beam vertical frame. A fixed screen plate is disposed along the lower side of the inclined surface of the inclined frame. A primary slag and iron chute is disposed at the bottom of the end of the fixed screen plate. A first collection box is disposed at the lower end of the primary slag and iron chute. A secondary slag and iron chute is disposed at the bottom of the upper end of the fixed screen plate. A second collection box is disposed at the lower end of the secondary slag and iron chute. A movable screen plate is disposed along the upper side of the inclined surface of the inclined frame. A rotating shaft is disposed under the movable screen plate. The rotating shaft includes a square middle part and a round end. The end of the rotating shaft passes through double-sided reinforcing side plates disposed at the edge of the inclined frame and is connected to one end of a connecting rod. The other end of the connecting rod is connected to an electro-hydraulic actuator, which is mounted on the I-beam vertical frame.
[0005] When the slag-iron ratio in the sample is too high, or when the proportion of flaky iron blocks is too high due to insufficient molten iron in the early stages of casting, the flaky iron blocks cannot pass through the sieve holes, and the fixed screening system cannot meet the requirements of continuous production. The electro-hydraulic actuator designed in this utility model connects to the movable sieve plate, which can be tilted at a certain angle on the screening surface, allowing the unqualified flaky iron blocks to flow into the No. 2 collection box in a timely manner. This can adapt to the working conditions of insufficient iron content or fluctuation in the slag-iron ratio in the early stages of casting, improve the flexibility of the screening equipment, and ensure continuous production. In addition, the slag-iron screening device of this utility model is directly connected to the cast iron machine head wheel in production, eliminating the need for manual or loader-driven secondary screening of the iron material after production. The movable sieve plate and the fixed sieve plate work together to allow unqualified iron blocks and slag of different particle sizes to flow into the collection box separately, while qualified iron blocks slide into the receiving car, achieving efficient separation, reducing manual intervention, and significantly improving the slag-iron sorting accuracy and automation level.
[0006] Furthermore, when the movable sieve plate is parallel to the inclined frame, the end of the movable sieve plate is seamlessly connected to the upper end of the fixed sieve plate.
[0007] The fixed screen plate and the movable screen plate form a continuous screening working surface, and the slag and iron are separated efficiently by gravity flow.
[0008] Furthermore, the movable sieve plate is evenly distributed with first sieve holes, and the fixed sieve plate is evenly distributed with second sieve holes. The shapes of the first sieve holes and the second sieve holes can be circular, square, or strip-shaped.
[0009] Furthermore, the size of the first sieve aperture is larger than the size of the second sieve aperture.
[0010] The differentiated screen aperture design of the movable screen plate and the fixed screen plate enables multi-stage screening and coordinated control. The movable screen plate is used to screen out substandard iron blocks and some slag, while the fixed screen plate is used to filter out the remaining slag mixed in with qualified iron blocks. The screen aperture size of the movable screen plate and the fixed screen plate is designed according to the critical particle size of the substandard iron blocks and slag.
[0011] Furthermore, a support plate is provided at the center of the fixed screen plate. The support plate is welded to the inclined frame and has several bolt holes. The support plate is bolted to the center of the fixed screen plate.
[0012] The fixed screen plate is bolted to the support plate at its center, which further ensures the stability of the fixed screen plate on the inclined frame.
[0013] Furthermore, several clamps are evenly distributed along the lower side of the movable screen plate along the center line and are bolted to the movable screen plate. The clamps are provided with square holes, and the middle part of the rotating shaft passes through the square holes.
[0014] The central part of the rotating shaft has a square structure and a square hole through the clamp. During the rotation of the rotating shaft and the movable screen plate, the square structure design prevents relative sliding between the rotating shaft and the movable screen plate. The clamp is designed as a quick-disassembly structure. When the movable screen plate needs to be replaced, the rotating shaft can be pulled out to replace the movable screen plate in time.
[0015] Furthermore, an adjustable limiting rod is provided on the secondary slag and iron chute. When the movable screen plate is tilted onto the secondary slag and iron chute, the limiting rod contacts the edge of the movable screen plate.
[0016] The electro-hydraulic actuator tilts the movable screen plate, and the tilt angle of the movable screen plate is infinitely adjustable by the stroke of the electro-hydraulic actuator. The purpose of setting the limit rod is to form a rigid stop with the edge of the screen plate, thereby limiting the rotation angle of the movable screen plate and preventing mechanical damage caused by overload.
[0017] Furthermore, the inclined frame is provided with a baffle at the top of the inclined surface. The baffle is welded to the inclined frame. When the movable screen plate is parallel to the baffle, the end of the baffle is located below the upper end of the movable screen plate.
[0018] The baffle restricts the movable screen plate from rotating clockwise, forming a rigid stop and also providing some support.
[0019] Furthermore, the horizontal included angle of the inclined frame is 30°-60°.
[0020] Iron blocks and slag fall onto the inclined frame under gravity. The inclined frame is set at an angle of 30°-60° to the horizontal plane, which helps to prevent the iron blocks and slag from rolling too fast or too slow on the movable and fixed screen plates, so that the iron blocks and slag pass through the movable and fixed screen plates for screening in sequence. The unqualified iron blocks and some slag screened by the movable screen plate flow into the No. 2 collection box through the secondary slag and iron chute, while the remaining slag screened by the fixed screen plate flows into the No. 1 collection box through the primary slag and iron chute. After two-stage sorting of "coarse screening + fine screening", the slag and iron separation accuracy is improved.
[0021] Compared with the prior art, the beneficial effects of this utility model are: 1. The slag and iron screening device designed in this utility model uses the iron blocks to roll down the inclined surface under their own gravity for screening, thereby achieving efficient separation of iron blocks and molten slag, reducing the risk of material accumulation. At the same time, the movable screen plate has a dynamic tilt angle adjustment function, which can adapt to the working conditions of insufficient iron content or fluctuation of slag and iron ratio in the early stage of casting, ensuring production continuity and equipment adaptability, and improving screening efficiency. 2. The fixed screen plate and the movable screen plate form a continuous screening working surface, and the screen hole size is designed differently to realize two-stage separation of "coarse screening + fine screening", which improves the slag and iron separation accuracy. 3. The electro-hydraulic actuator is connected to the movable sieve plate. When the proportion of slag and iron in the sample is too high or the proportion of sheet iron blocks is too high due to insufficient molten iron in the early stage of casting, the electro-hydraulic actuator can be driven to tilt the movable sieve plate at a certain angle, so as to discharge unqualified iron blocks or slag and iron in time and reduce manual intervention. 4. Mechatronics drive, with coordinated control of electro-hydraulic actuators and mechanical limit components, can complete the screen plate tilt angle switching within 5 seconds, significantly reducing manual intervention and adapting to the needs of continuous production; 5. Modular maintenance design with quick-disassembly clamp locking device allows screen plates to be replaced without stopping the machine, shortening maintenance time. Attached Figure Description
[0022] Figure 1 : Axonometric view of the overall structure of the slag and iron screening device of this utility model; Figure 2 Top view of the overall structure of the slag and iron screening device of this utility model; Figure 3 Isometric view of the movable sieve plate of this utility model; Figure 4 Axonometric drawing of the fixed sieve plate of this utility model; In the diagram: 1. I-beam vertical frame; 2. Movable screen plate; 201. First screen hole; 202. Rotating shaft; 203. Clamp; 3. Fixed screen plate; 301. Second screen hole; 4. Electro-hydraulic actuator; 5. Primary slag and iron chute; 6. Secondary slag and iron chute; 7. No. 1 collection box; 8. No. 2 collection box; 9. Connecting rod; 10. Limiting rod; 11. Baffle. Detailed Implementation
[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0024] The specific implementation adopts the following technical solution, which will be further explained below with reference to the accompanying drawings.
[0025] A slag and iron screening device for cast iron head wheels includes an I-beam vertical frame 1 and an inclined frame disposed on the inclined surface of the I-beam vertical frame 1. A fixed screen plate 3 is disposed along the lower side of the inclined surface of the inclined frame. The four corners of the fixed screen plate 3 are bolted to the inclined frame. A primary slag and iron chute 5 is provided at the bottom of the end of the fixed screen plate 3. A first collection box 7 is disposed at the lower end of the primary slag and iron chute 5. A secondary slag and iron chute 6 is provided at the bottom of the upper end of the fixed screen plate 3. The lower end of the secondary slag and iron chute 6 is provided with a second collection box 8. The inclined frame is provided with a movable screen plate 2 along the upper side of the inclined surface. The movable screen plate 2 is provided with a rotating shaft 202. The rotating shaft 202 includes a square middle part and a round end. The end of the rotating shaft 202 passes through the double-sided reinforcing side plates provided at the edge of the inclined frame and is connected to one end of the connecting rod 9. The other end of the connecting rod 9 is connected to the electro-hydraulic push rod 4. The electro-hydraulic push rod 4 is installed on the I-beam vertical frame 1.
[0026] When the slag-iron ratio in the sample is too high, or when the proportion of flaky iron blocks is too high due to insufficient molten iron in the early stage of casting, the flaky iron blocks cannot pass through the sieve holes, and the fixed screening system cannot meet the requirements of continuous production. The electro-hydraulic push rod 4 of this utility model is connected to the movable sieve plate 2. The movable sieve plate 2 can be tilted at a certain angle on the screening surface, so that the unqualified flaky iron blocks can flow into the second collection box 8 in time. It can adapt to the working conditions of insufficient iron or fluctuation of slag-iron ratio in the early stage of casting, improve the flexibility of screening equipment, and ensure continuous production. In addition, the slag-iron screening device of this utility model is directly connected to the cast iron machine head wheel in production, without relying on manual labor or forklifts to perform secondary screening of the iron material after production. The movable sieve plate 2 and the fixed sieve plate 3 cooperate with each other, so that unqualified iron blocks and slag of different particle sizes flow into the collection box respectively, and qualified iron blocks slide into the receiving car, realizing efficient separation, reducing manual intervention, and significantly improving the slag-iron sorting accuracy and automation level.
[0027] Furthermore, when the electro-hydraulic actuator 4 drives the movable screen plate 2 to be parallel to the inclined frame, the end of the movable screen plate 2 is seamlessly connected to the upper end of the fixed screen plate 3.
[0028] The fixed screen plate 3 and the movable screen plate 2 form a continuous screening working surface, and the slag and iron are separated efficiently by gravity flow.
[0029] Furthermore, the movable sieve plate 2 has a first sieve hole 201 evenly distributed on it, and the fixed sieve plate 3 has a second sieve hole 301 evenly distributed on it. The shapes of the first sieve hole 201 and the second sieve hole 301 can be circular, square, or strip-shaped. The size of the first sieve hole 201 is larger than the size of the second sieve hole 301.
[0030] The differentiated screen aperture design of the movable screen plate 2 and the fixed screen plate 3 enables multi-stage screening and coordinated control. The movable screen plate 2 is used to screen out substandard iron blocks and some slag, while the fixed screen plate 3 is used to filter out the remaining slag mixed in with qualified iron blocks. The screen aperture size of the movable screen plate 2 and the fixed screen plate 3 is designed according to the critical particle size of substandard iron blocks and slag.
[0031] A support plate is installed below the center of the fixed screen plate 3. The support plate is welded to the inclined frame and has several bolt holes. The support plate is bolted to the center of the fixed screen plate. The bolt connection between the center of the fixed screen plate 3 and the support plate further ensures the stability of the fixed screen plate on the inclined frame.
[0032] Furthermore, several clamps 203 bolted to the movable screen plate 2 are evenly distributed along the lower side of the center line of the movable screen plate 2. The clamps 203 are provided with square holes, and the middle part of the rotating shaft 202 passes through the square holes.
[0033] The central part of the rotating shaft 202 has a square structure and passes through the square hole of the clamp 203. During the rotation of the rotating shaft 202 and the movable screen plate 2, the square structure design prevents relative sliding between the rotating shaft 202 and the movable screen plate 2. The clamp 203 is designed as a quick-disassembly structure. When the movable screen plate 2 needs to be replaced, the rotating shaft 202 can be pulled out to replace the movable screen plate 2 in time.
[0034] Furthermore, an adjustable limiting rod 10 is provided on the secondary slag and iron chute 6. When the movable screen plate 2 is tilted onto the secondary slag and iron chute 6, the limiting rod 10 contacts the edge of the movable screen plate 2.
[0035] The electro-hydraulic actuator 4 is driven to tilt the movable screen plate 2, and the tilt angle of the movable screen plate 2 can be infinitely adjusted by the stroke of the electro-hydraulic actuator 4. The purpose of setting the limit rod 10 is to form a rigid stop with the edge of the movable screen plate 2 by the limit rod 10, so that the rotation angle of the movable screen plate 2 is limited and mechanical damage caused by overload is prevented. The limit rod 10 is set at different positions on the secondary slag and iron chute 6 according to actual needs.
[0036] Furthermore, the inclined frame is provided with a baffle 11 at the top of the inclined surface. The baffle 11 is welded to the inclined frame. When the movable screen plate 2 is parallel to the baffle 11, the end of the baffle 11 is located below the upper end of the movable screen plate 2.
[0037] The baffle 11 constrains the movable screen plate 2 to rotate clockwise, forming a rigid stop and also providing some support.
[0038] Furthermore, the angle between the inclined frame and the horizontal is 30°-60°.
[0039] Iron blocks and slag fall onto the inclined frame under gravity. The inclined frame is set at an angle of 30°-60° to the horizontal plane, which helps to prevent the iron blocks and slag from rolling too fast or too slow on the movable screen plate 2 and the fixed screen plate 3. This allows the iron blocks and slag to pass through the movable screen plate 2 and the fixed screen plate 3 for screening. The unqualified iron blocks and some slag screened out by the movable screen plate 2 flow into the second collection box 8 through the secondary slag and iron chute 6. The remaining slag screened out by the fixed screen plate 3 flows into the first collection box 7 through the primary slag and iron chute 5. After two-stage sorting of "coarse screening + fine screening", the slag and iron separation accuracy is improved.
[0040] The working steps of the above embodiments are as follows: 1. Activate the control switch of the electro-hydraulic actuator 4 to keep the movable screen plate 2 in a working position parallel to the inclined frame; the iron blocks produced by the iron casting machine first slide onto the movable screen plate 2. The iron blocks with qualified dimensions flow through the movable screen plate 2 and the fixed screen plate 3 and then slide into the receiving car; the iron blocks with unqualified dimensions and some slag pass through the movable screen plate 2 and fall into the second collection box 8. Then the remaining slag falls through the screen holes of the fixed screen plate 3 into the first collection box 7. 2. When the flow rate of molten iron is insufficient or the slag content exceeds the standard, operate the electro-hydraulic push rod 4 to tilt the movable screen plate 2. The substandard sheet iron blocks or residual slag particles will slide into the No. 2 collection box 8 along the secondary slag and iron chute 6 under the blocking effect of the screen plate. 3. The tilting action of the movable screen plate 2 is mechanically stopped by the limit rod 10 to ensure that the tilting is within a certain range and to prevent the rotating shaft 202 from being overloaded; 4. To replace the screen plate, loosen the quick-release clamp 203 and pull out the rotating shaft 202 to remove the movable screen plate 2. The replacement takes little time.
[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A slag and iron screening device for cast iron head wheels, comprising an I-beam vertical frame (1) and an inclined frame disposed on the inclined surface of the I-beam vertical frame (1), characterized in that, The inclined frame is provided with a fixed screen plate (3) along the lower side of the inclined surface. The bottom side of the end of the fixed screen plate (3) is provided with a first-stage slag and iron chute (5). The lower end of the first-stage slag and iron chute (5) is provided with a first collection box (7). The bottom side of the upper end of the fixed screen plate (3) is provided with a second-stage slag and iron chute (6). The lower end of the second-stage slag and iron chute (6) is provided with a second collection box (8). The inclined frame is provided with a movable screen plate (2) along the upper side of the inclined surface. The movable screen plate (2) is provided with a rotating shaft (202). The rotating shaft (202) includes a square middle part and a round end. The end of the rotating shaft (202) passes through the double-sided reinforced side plate provided at the edge of the inclined frame and is connected to one end of the connecting rod (9). The other end of the connecting rod (9) is connected to the electro-hydraulic push rod (4). The electro-hydraulic push rod (4) is installed on the I-beam vertical frame (1).
2. The slag and iron screening device for cast iron head wheels according to claim 1, characterized in that, When the movable sieve plate (2) is parallel to the inclined frame, the end of the movable sieve plate (2) is seamlessly connected to the upper end of the fixed sieve plate (3).
3. The slag and iron screening device for cast iron head wheels according to claim 1, characterized in that, The movable sieve plate (2) has a first sieve hole (201) evenly distributed on it, and the fixed sieve plate (3) has a second sieve hole (301) evenly distributed on it. The shape of the first sieve hole (201) and the second sieve hole (301) can be circular, square or strip-shaped.
4. The slag and iron screening device for cast iron head wheels according to claim 3, characterized in that, The size of the first sieve hole (201) is larger than the size of the second sieve hole (301).
5. The slag and iron screening device for cast iron head wheels according to claim 1, characterized in that, The movable screen plate (2) has several clamps (203) evenly distributed along the lower side of the center line and bolted to the movable screen plate (2). The clamps (203) are provided with square holes, and the middle part of the rotating shaft (202) passes through the square holes.
6. The slag and iron screening device for cast iron head wheels according to claim 1, characterized in that, An adjustable limiting rod (10) is provided on the secondary slag and iron chute (6). When the movable screen plate (2) is tilted onto the secondary slag and iron chute (6), the limiting rod (10) contacts the edge of the movable screen plate (2).
7. The slag and iron screening device for cast iron head wheels according to claim 1, characterized in that, The inclined frame is provided with a baffle (11) at the top of the inclined surface. The baffle (11) is welded to the inclined frame. When the movable sieve plate (2) is parallel to the baffle (11), the end of the baffle (11) is located below the upper end of the movable sieve plate (2).
8. The slag and iron screening device for cast iron head wheels according to claim 1, characterized in that, The horizontal angle of the inclined frame is 30°-60°.