Air-blowing type metallurgical raw material screening and conveying dual-purpose device

Abstract

An air-blowing type metallurgical raw material screening and conveying dual-purpose device comprises a hopper body, a screening device, an air-blowing device, a baffle device and a supporting device, a funnel-shaped feeding opening is formed in the top of the hopper body, and a discharging opening and a lime powder conveying pipe connector are formed in the bottom of the hopper body; the screening device is arranged in the hopper body and moves and is fixed in a positioning pulley mode. An electromagnetic valve and a double-shaft air cylinder are adopted in the air blowing device to control a blowing pipe assembly to blow the screen; a double-shaft air cylinder in the baffle device controls reciprocating motion of a wedge-shaped baffle, and the wedge-shaped baffle is arranged over the screen when other raw materials are conveyed. A cylinder support is arranged on the lower portion of the double-shaft cylinder and is of a steel frame structure. Clamping devices are arranged on the two sides of the double-shaft air cylinder and used for fixing the double-shaft air cylinder. According to the utility model, lime blocks can be screened and conveyed and other non-metal raw materials can be conveyed in the metallurgical industry, and meanwhile, the screen can be purged at regular time, so that the problem of blockage of the screen is solved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of screening devices, in particular to an air-blowing dual-purpose device for screening and conveying metallurgical raw materials. Background Art

[0002] Converter steelmaking is one of the important process flows in the metallurgical industry. In order to remove impurities such as phosphorus and sulfur in molten steel and control the process temperature, a variety of non-metallic materials need to be added to the converter. Among them, lime is widely used in converter steelmaking as a slag-forming agent. Due to the unstable particle size and unstable transportation process during the use of lime, a large amount of lime powder exists in the lime raw material. However, during the raw material transportation process, the lime powder is not all put into the converter, but is sucked away by the conveying and dust removal system, resulting in low effective utilization of the lime raw material and affecting the steelmaking component ratio. At the same time, due to the large amount of lime powder inhaled in the dust removal system, the system load increases, affecting the service life of the entire system.

[0003] At present, most screening organizations on the market adopt the method of timely replacement of screens to avoid the problem of screen clogging, which leads to frequent screen replacement and increased labor costs. Summary of the invention

[0004] The utility model aims to provide a mechanical device for conveying various non-metallic materials required by steel-making converters, so as to solve the problem of clogging of existing screens.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an air-blowing metallurgical raw material screening and conveying dual-purpose device. The device comprises:

[0006] The hopper body is composed of five parts: screening device, air blowing device, baffle device and supporting device.

[0007] Preferably, the hopper body has a funnel-shaped feed port on the top for receiving raw materials from the upper belt; and a discharge port and a lime powder conveying pipe interface at the bottom. The discharge port is used to transfer the screened lime and other raw materials. The lime powder conveying pipe interface bypasses the lower belt and is connected to the conveying pipe, which leads to the lime powder hopper for storage.

[0008] Preferably, the screening device has a screen structure, and the screen is welded with round steel bars at equal intervals, and the distance design depends on the screening requirements of the lime blocks. A directional pulley guide is provided in the hopper to facilitate the positioning and replacement of the screen. A manual pull rod is provided on the right side of the screen for manual replacement of the screen.

[0009] Preferably, the air blowing device is used to clean the residual white ash particles in the screen. The air blowing device is composed of a compressed air pipe, a solenoid valve, a switch controller, a central blow pipe, side-by-side blow pipes, equally spaced blow ports, a push-pull device and a double-axis cylinder. The air compressor is used to produce compressed air, and the compressed air pipe is used to transport compressed air. A central blow pipe and five side-by-side blow pipes are designed to be arranged side by side horizontally to form a blow pipe assembly. Equally spaced blow ports are set on the side-by-side blow pipes to transport compressed air during operation to purge the residual white ash particles in the screen. The solenoid valve and the switch controller are used to control the supply time of compressed air in the blow pipe assembly. The double-axis cylinder is used to control the reciprocating motion of the blow pipe assembly. A control cabinet is used to control the directional operation of the double-axis cylinder.

[0010] Preferably, the baffle device is used to transport other non-metallic raw materials except lime. The baffle device is composed of a wedge-shaped baffle, a push-pull device and a cylinder.

[0011] Preferably, the wedge-shaped baffle is located between the double-axis cylinder and the hopper body when it stops working, and acts on the upper surface of the screen when it works. The double-axis cylinder and the cylinder main shaft connecting plate are used to control the reciprocating motion of the wedge-shaped baffle. A control cabinet is used to control the directional operation of the double-axis cylinder.

[0012] Preferably, the supporting device is used to support the functional components in the device. A cylinder bracket is arranged at the bottom of the double-axis cylinder, and the cylinder bracket is a steel frame structure. Clamping devices are arranged on both sides of the double-axis cylinder to fix the double-axis cylinder.

[0013] Preferably, a support seat is provided on the outer side of the hopper body for the blow pipe assembly and the wedge-shaped baffle when they stop working, and a support plate is provided on the other side of the blow pipe assembly and the wedge-shaped baffle, and the support plate and the clamping device share a cylinder bracket.

[0014] The beneficial effects of the utility model.

[0015] Compared with the prior art, the utility model can be used for conveying a variety of non-metallic raw materials for converter steelmaking. At the current stage, it is mainly used for lime screening. If there are other raw materials that need to be screened in the next stage, the screening device can be used to achieve the screening effect. If the raw materials do not need to be screened, the wedge-shaped baffle is applied above the screen. Therefore, the device is versatile. The device is provided with a detachable screen, a detachable wedge-shaped baffle, and a detachable blowpipe assembly, so that the components can be replaced in time according to the degree of wear of the components. The device is provided with an air blowing device, which can purge the screen to ensure that the screen is unobstructed and increase the service life of the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall axial side structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the axial structure of the hopper body.

[0018] Figure 3 This is a schematic diagram of the axonometric structure of the screening device.

[0019] Figure 4 This is a schematic diagram of the axonometric structure of the air blowing device.

[0020] Figure 5 This is a schematic diagram of the axonometric structure of the baffle device.

[0021] Figure 6 This is a schematic diagram of the axonometric structure of the support device.

[0022] Figure markings: 101-funnel-shaped feed inlet; 102-discharge port; 103-lime powder delivery pipe interface; 201-screen; 202-manual pull rod; 203-positioning pulley; 204-blow pipe assembly support plate; 205-wedge-shaped baffle; 301-air pressure pipe; 302-solenoid valve; 303-double-axis cylinder; 304-push-pull device; 305-central blow pipe; 306-side-by-side blow pipes; 307-equally spaced blow ports; 401-wedge-shaped baffle; 402-double-axis cylinder; 403-cylinder main shaft connecting plate; 501-baffle bracket; 502-clamping device; 503-cylinder bracket. DETAILED DESCRIPTION

[0023] The utility model mainly includes a hopper body 100, and a funnel-shaped feed port 101 is arranged on the top of the hopper body so that the upper belt raw materials can fall more fully on the screen or baffle surface. A discharge port 102 and a lime powder conveying pipe interface 103 are arranged at the lower part of the hopper body 100. A wedge-shaped baffle 205 and a blowpipe assembly support plate 204 are arranged on the side of the hopper body 100 to reduce the influence of the weight of the wedge-shaped baffle and the blowpipe assembly on the cylinder push rod. A positioning pulley 203 is arranged inside the hopper body 100 for directional movement of the screen.

[0024] A screening device 200 is installed inside the hopper body 100. The screen 201 can be directional moved in the positioning pulley 203. When the screen moves to the inside of the hopper, the screen 201 is fixed. A manual pull rod 202 is provided on the right side of the screen to facilitate more convenient replacement after the screen is worn. The inside of the screen 201 is an equidistant round rod structure with a spacing of 5 mm to separate the lime below 5 mm.

[0025] An air blowing device 300 is provided at the bottom of the screening device, and the device is composed of a compressed air pipe 301, a solenoid valve 302, a double-axis cylinder 303, a push-pull device 304, a central blow pipe 305, side-by-side blow pipes 306 and equidistant blow ports 307. Compressed air is connected to the compressed air pipe 301 and the solenoid valve 302 through the central blow pipe 305 and the side-by-side blow pipes 306. The left side of the solenoid valve is connected to the compressed air pipe, and the right side is connected to the blow pipe assembly. The blow pipe assembly adopts a horizontal side-by-side design, consisting of a central blow pipe 305 and five side-by-side blow pipes 306, and a number of equidistant blow ports 307 are arranged on the side-by-side blow pipes 306. The outside of the central blow pipe 305 is connected to the cylinder main shaft connecting plate 403, and the double-axis cylinder 303 is fixed to the cylinder bracket 503 using a clamping device 502. When the double-axis cylinder 303 stops working, the blowpipe assembly is placed above the baffle bracket 501 and the blowpipe assembly support plate 204. When working, the double-axis cylinder 203 pushes the air blowing assembly to move inside the hopper body. When the blowpipe assembly touches the right inner surface of the hopper body, it stops working.

[0026] A baffle device 400 is provided on the upper part of the screening device. The baffle uses a wedge-shaped baffle 401, which is thick on the left and thin on the right, so as to facilitate the removal of the remaining white ash on the screen. The left side of the wedge-shaped baffle 401 is connected to the cylinder main shaft connecting plate 403 by bolts, and the double-axis cylinder 402 is fixed to the cylinder bracket by a clamping device 502. When the double-axis cylinder 402 stops working, the wedge-shaped baffle 401 is placed on the baffle bracket 501 and the wedge-shaped baffle 205. When working, the double-axis cylinder 402 pushes the wedge-shaped baffle to move inside the hopper. When the wedge-shaped baffle touches the inner surface of the right side of the hopper, it stops working.

[0027] The double-axis cylinder 303 and the double-axis cylinder 402 are fixed on the cylinder bracket 503 by using the clamping device 502. The cylinder bracket 503 is located at the lower part of the double-axis cylinder 303 and the double-axis cylinder 402, and is welded by square tubes. It is mainly used for supporting the double-axis cylinder 303 and the double-axis cylinder 402, the wedge baffle 401, the central blowpipe 305 and the five parallel blowpipes 306.

[0028] The utility model is arranged between the upper belt conveyor 601 and the lower belt conveyor 602 in the raw material conveying system of the steel-making converter.

[0029] When the raw material is lime, the lime is transported to the funnel-shaped feed port 101 through the upper belt conveyor 601. After passing through the funnel-shaped feed port 101, the lime falls on the screen 201 for screening. At this time, the screen 201 sieves the lime powder into the lime powder conveying pipe interface 103 and flows into the hopper; the lime blocks fall along the upper surface of the screen 201 through the discharge port 102 to the lower belt conveyor 602. Before the lime raw material is transported, the air blowing device is manually controlled to purge the screen 201. The control cabinet controls the cylinder 303 to push the air blowing device to the inside of the hopper, turn on the air compressor, open the solenoid valve 302, and the compressed air quickly enters the blowpipe assembly (a central blowpipe 305 and five parallel blowpipes 306), and starts to purge the lime embedded between the screens 201. After the lime is transported, the purge continues for 1 minute. After the purging is completed, the electromagnetic valve 302 is closed, and the control cabinet controls the cylinder 303 to pull the air blowing device (a central blowing pipe 305 and five parallel blowing pipes 306) out to the air blowing device support seat (204 and 501). The lower layer belt conveyor 602 transports the screened lime to the next process.

[0030] When the raw material is other non-metallic materials, before the raw material is conveyed, the control cabinet controls the double-axis cylinder 402 to push the wedge-shaped baffle 401 into the hopper and place it directly above the screen 201. The raw material is conveyed to the funnel-shaped feed port 101 through the upper belt conveyor 601, and after passing through the funnel-shaped feed port 101, it falls on the surface of the wedge-shaped baffle 401, and then falls on the lower belt conveyor 602 through the discharge port 102, and the lower belt conveyor 602 conveys the raw material to the next process.

[0031] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An air-blowing metallurgical raw material screening and conveying dual-purpose device, characterized in that: include: Hopper body: The top is provided with a feed port, the bottom is provided with a discharge port and a lime powder conveying pipe interface; Screening device: It is set inside the hopper body and is moved and fixed by positioning pulleys; Air blowing device: electromagnetic valve and double-axis cylinder control the blowpipe assembly to blow the screen; Baffle device: The double-axis cylinder controls the reciprocating motion of the wedge-shaped baffle, which is placed directly above the screen when conveying the remaining raw materials; Support device: A cylinder bracket is arranged at the bottom of the double-axis cylinder, which is a steel frame structure; clamping devices are arranged on both sides of the double-axis cylinder to fix the double-axis cylinder.

2. The air-blowing metallurgical raw material screening and conveying device according to claim 1 is characterized in that The feeding port of the hopper body is funnel-shaped.

3. The air-blowing metallurgical raw material screening and conveying device according to claim 2 is characterized in that A wedge-shaped baffle and a blow pipe assembly support seat are arranged on the side of the hopper body.

4. The air-blowing metallurgical raw material screening and conveying device according to claim 1 is characterized in that A manual pull rod is set on the right side of the screen to facilitate regular replacement of the screen.

5. The air-blowing metallurgical raw material screening and conveying device according to claim 4 is characterized in that The screen is made of circular steel bars welded at equal intervals.

6. The air-blowing metallurgical raw material screening and conveying device according to claim 1 is characterized in that The air blowing device is composed of an air pressure pipe, a solenoid valve, a switch controller, a central blowing pipe, parallel blowing pipes, equally spaced blowing ports, a push-pull device and a double-axis cylinder.

7. The air-blowing metallurgical raw material screening and conveying device according to claim 6 is characterized in that The blowpipe assembly adopts a horizontal side-by-side design, consisting of a central blowpipe and five side-by-side blowpipes, and a number of blow ports are arranged on the side-by-side blowpipes.

8. The air-blowing metallurgical raw material screening and conveying device according to claim 6 is characterized in that A solenoid valve and a switch controller are used to control the compressed air supply time in the blowpipe assembly.

9. The air-blowing metallurgical raw material screening and conveying device according to claim 6 is characterized in that A double-axis cylinder and a push-pull device are used to control the reciprocating motion of the blowpipe assembly.

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