Automatic control device and method for crushing and screening steel slag with different particle sizes

Abstract

The application discloses an automatic control device and method for steel slag crushing and screening with different particle sizes, and relates to the technical field of steel slag crushing.The device comprises a crushing box, a screening box is installed below the crushing box, a roller shaft crushing assembly and a displacement driving assembly are installed on the crushing box, and the roller shaft crushing assembly is displaced under the driving of the displacement driving assembly; a screening plate assembly and an eccentric wheel assembly are installed on the screening box, and the screening plate assembly vibrates under the driving of the eccentric wheel assembly.The working method comprises crushing particle size adjustment operation, screening particle size adjustment operation and circulating operation.The displacement driving assembly drives the roller shaft crushing assembly to displace, so that the distance between two oppositely arranged roller shafts is adjusted, the crushing effect of the steel slag is adjusted, the electric telescopic cylinder drives the screening plate assembly, and the steel slag with different particle sizes is screened out.The automatic control of the steel slag crushing and screening with different particle sizes is realized.

Description

Technical Field

[0001] This invention relates to the field of steel slag crushing technology, and in particular to an automated control device and method for crushing and screening steel slag of different particle sizes. Background Technology

[0002] Steel slag is an industrial solid waste generated during the steelmaking process in the iron and steel industry. It contains abundant resources and is classified into converter slag, open-hearth furnace slag, and electric furnace slag according to furnace type. It is mainly composed of oxides of calcium, iron, silicon, magnesium, and small amounts of aluminum, manganese, and phosphorus. Steel slag accounts for approximately 15% of steel production. In 2020, the annual discharge of steel slag was approximately 160 million tons, accounting for about 24% of the total solid waste from the iron and steel industry. The comprehensive utilization rate is less than 40%. Therefore, the treatment and resource utilization of steel industry waste slag are receiving increasing attention.

[0003] Steel slag aggregate has advantages such as high strength, rough surface, good wear resistance and durability, high density, and good stability. Compared with ordinary crushed stone, it also has the characteristic of resistance to low-temperature cracking. At present, steel slag is mainly used as coarse and fine aggregate, primarily for the preparation of cement concrete or steel slag asphalt concrete, and is widely used for backfilling in road engineering.

[0004] However, steel slag produced in steelmaking has an inconsistent particle size, which does not meet the requirements for aggregate particle size distribution. Therefore, it cannot be directly used in concrete preparation and requires further crushing and screening. Existing steel slag crushing and screening devices, such as patent CN220443939U, while integrating crushing and screening, do not offer automatic control over the crushed and screened particle sizes. When producing steel slag of different sizes, multiple processing equipment still need to work together, increasing the crushing process and production costs, and hindering the large-scale utilization of steel slag.

[0005] Therefore, the automatic control of steel slag crushing particle size can be achieved by adjusting the spacing between the crushing rollers during steel slag crushing; the automatic control of steel slag screening particle size can be achieved by adjusting the mesh size of the screen during steel slag screening; and the automated production of steel slag with different particle sizes can be achieved by coordinating the crushing box, screening box and elevator to perform cyclic crushing and screening of steel slag that does not meet the aggregate particle size distribution requirements. These are all problems that urgently need to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide an automated control device and method for crushing and screening steel slag of different particle sizes, which solves the problems of existing steel slag crushing and screening devices that cannot automatically adjust the crushing particle size of steel slag, cannot automatically adjust the screening particle size of steel slag, and cannot realize the cyclic crushing and screening operation of steel slag.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] This invention provides an automated control device for crushing and screening steel slag of different particle sizes, including a crushing box, a screening box installed below the crushing box, a roller crushing assembly and a displacement driving assembly installed on the crushing box, the roller crushing assembly being displaced under the drive of the displacement driving assembly; the roller crushing assembly crushes steel slag of different particle sizes when it is displaced under the drive of the displacement driving assembly; a screening plate assembly and an eccentric wheel assembly are installed on the screening box, the screening plate assembly vibrating under the drive of the eccentric wheel assembly; the size of the screen holes on the screening plate assembly is controlled by an electric telescopic cylinder, thereby screening out steel slag of different particle sizes by controlling the size of the screen holes on the screening plate assembly through the electric telescopic cylinder.

[0009] Specifically, the crushing box also includes a first box body, on which horizontal and vertical grooves are symmetrically formed on the inner wall;

[0010] The roller crushing assembly includes symmetrically arranged rollers. The two ends of the rollers are equipped with first wedges through bearings. The first wedges are slidably connected in the horizontal groove. One end of the roller passes through the side wall of the first housing and is connected to a wheel.

[0011] Specifically, the displacement drive assembly includes a hydraulic telescopic cylinder and a second wedge. The hydraulic telescopic cylinder is installed on the top of the first housing, and the second wedge is slidably connected in the vertical slide groove. The output end of the hydraulic telescopic cylinder is connected to the second wedge in a transmission manner. The first wedge and the second wedge abut together. When the second wedge moves downward along the vertical slide groove under the drive of the hydraulic telescopic cylinder, the second wedge pushes the first wedge to move along the horizontal slide groove.

[0012] Specifically, the screening box includes a second box body, on which rotating holes are symmetrically opened, and a first discharge port is also opened on the side wall of the second box body;

[0013] The screening plate assembly includes a first screening plate frame and a second screening plate. Screen holes are provided on both the first screening plate frame and the second screening plate. Round tubes are symmetrically installed on the side wall of the first screening plate frame and are rotatably connected in the rotating holes.

[0014] A first sliding groove is provided on the inner wall of the first sieve plate frame, and the second sieve plate is slidably connected in the first sliding groove. Multiple springs abut between one side of the inner wall of the first sieve plate frame and one side of the outer wall of the second sieve plate.

[0015] A push pin is slidably connected inside the circular tube located on the opposite side of the spring. One end of the push pin abuts against the side wall of the second sieve plate, and the other end is connected to the output end of the electric telescopic cylinder. The electric telescopic cylinder is installed on the outer wall of the second housing.

[0016] One end of the first screen frame overlaps the first discharge port.

[0017] Specifically, the eccentric wheel assembly includes a motor and an eccentric wheel. The motor is mounted on the outer wall of the second housing, and the eccentric wheel is rotatably connected inside the second housing. The eccentric wheel is driven by the output end of the motor, and the eccentric wheel corresponds to the first sieve plate frame.

[0018] Specifically, a bucket elevator is provided at the first discharge port for transporting steel slag back to the crushing box for re-crushing.

[0019] The present invention also provides a working method for an automated control device for crushing and screening steel slag with different particle sizes as described above, comprising the following steps:

[0020] S1, Crushing particle size adjustment operation: The hydraulic telescopic cylinder drives the second wedge to move downward along the vertical slide groove. When the second wedge moves downward along the vertical slide groove, it pushes the first wedge to move along the horizontal slide groove toward the center of the first box. The first wedge drives the roller to move synchronously.

[0021] S2, Screening particle size adjustment operation: When the electric telescopic cylinder is working, it drives the ejector pin to move along the axial direction of the circular tube. When the ejector pin moves, the second screen plate slides along the first slide groove under the action of the ejector pin and the spring, and the screen holes on the second screen plate and the screen holes on the first screen plate frame are misaligned.

[0022] S3, Circular Processing Operation: An external motor drives a rotating wheel via a belt. When the rotating wheel rotates, it drives the roller shaft to rotate. The steel slag is crushed by the roller shaft as it passes between two oppositely arranged roller shafts. The crushed steel slag falls onto the screening plate assembly. Steel slag with a particle size smaller than the screen hole size on the screening plate assembly falls directly from the bottom of the screening box into the external collection device. Steel slag with a particle size not smaller than the screen hole size on the screening plate assembly falls from the first discharge port into the bucket elevator and is transported back to the middle of the two oppositely arranged roller shafts by the bucket elevator for repeated crushing and screening.

[0023] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0024] The present invention drives the displacement of the roller crushing component by a displacement driving component, thereby adjusting the distance between two oppositely arranged rollers and thus adjusting the crushing effect of steel slag.

[0025] This invention improves the screening effect of steel slag by driving the screening plate assembly to move through the eccentric wheel assembly.

[0026] The present invention uses an electric telescopic cylinder to drive the second screening plate to move within the first groove on the first screening plate frame, thereby enabling the screen holes on the first screening plate frame and the second screening plate to move in a staggered manner, thus achieving automatic adjustment of the screen hole size. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the steel slag crushing and screening device of the present invention;

[0029] Figure 2 This is a top view of the crushing chamber of the present invention;

[0030] Figure 3 This is a cross-sectional view at point AA of the present invention;

[0031] Figure 4 This is a schematic diagram of the screening box structure of the present invention;

[0032] Figure 5 This is a cross-sectional view of the screening box of the present invention;

[0033] Figure 6 This is a schematic diagram of the sieve plate assembly structure of the present invention.

[0034] Explanation of reference numerals in the attached diagram: 1. Crushing box; 2. Screening box;

[0035] 11. Roller crushing assembly; 111. Roller; 112. First wedge; 113. Rotor;

[0036] 12. Displacement drive assembly; 121. Hydraulic telescopic cylinder; 122. Second wedge block;

[0037] 13. First housing; 131. Horizontal slide rail; 132. Vertical slide rail;

[0038] 23. Second housing; 231. First discharge port;

[0039] 24. Electric telescopic cylinder;

[0040] 21. Screening plate assembly; 211. First screen plate frame; 212. Second screen plate; 213. Circular tube; 214. First chute; 215. Spring;

[0041] 22. Eccentric wheel assembly; 221. Motor; 222. Eccentric wheel. Detailed Implementation

[0042] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] Example 1: As Figure 1-6 As shown, an automated control device for crushing and screening steel slag of different particle sizes includes a crushing box 1, a screening box 2 installed below the crushing box 1, a roller crushing assembly 11 and a displacement driving assembly 12 installed on the crushing box 1, the roller crushing assembly 11 being displaced under the drive of the displacement driving assembly 12; the roller crushing assembly 11 being displaced under the drive of the displacement driving assembly 12 to crush steel slag of different particle sizes; a screening plate assembly 21 and an eccentric wheel assembly 22 installed on the screening box 2, the screening plate assembly 21 vibrating under the drive of the eccentric wheel assembly 22; the size of the screen holes on the screening plate assembly 21 is controlled by an electric telescopic cylinder 24, thereby screening out steel slag of different particle sizes by controlling the size of the screen holes on the screening plate assembly 21 by the electric telescopic cylinder 24.

[0044] Specifically, the crushing box 1 also includes a first box body 13, on which horizontal grooves 131 and vertical grooves 132 are symmetrically opened on the inner wall of the first box body 13;

[0045] The roller crushing assembly 11 includes symmetrically arranged rollers 111. The two ends of the rollers 111 are equipped with first wedges 112 through bearings. The first wedges 112 are slidably connected in the horizontal chute 131. One end of the rollers 111 passes through the side wall of the first housing 13 and is connected to a wheel 113.

[0046] When the first wedge 112 slides in the horizontal chute 131, it causes the distance between the two symmetrically arranged rollers 111 to change, thereby achieving the crushing of steel slag with different particle sizes.

[0047] Specifically, an elongated hole is provided on the side wall of the first housing 13 for the end of the shaft 111 to move.

[0048] Specifically, the displacement drive assembly 12 includes a hydraulic telescopic cylinder 121 and a second wedge 122. The hydraulic telescopic cylinder 121 is installed on the top of the first housing 13, and the second wedge 122 is slidably connected in the vertical slide groove 132. The output end of the hydraulic telescopic cylinder 121 is connected to the second wedge in a transmission manner. The first wedge 112 and the second wedge 122 abut together. When the second wedge 122 moves downward along the vertical slide groove 132 under the drive of the hydraulic telescopic cylinder 121, the second wedge 122 pushes the first wedge 112 to move along the horizontal slide groove 131.

[0049] The second wedge 122 is driven by the hydraulic telescopic cylinder 121 to slide in the vertical slide groove 132, which in turn drives the corresponding first wedge 112 to slide in the horizontal slide groove 131, thereby realizing the automatic control of the distance between the two symmetrically arranged rollers 111, which makes it easier for the device to crush steel slag of different particle sizes.

[0050] Specifically, the screening box 2 includes a second box body 23, with symmetrical rotating holes on the side wall of the second box body 23, and a first discharge port 231 on the side wall of the second box body 23.

[0051] The screening plate assembly 21 includes a first screening plate frame 211 and a second screening plate 212. Screen holes are provided on both the first screening plate frame 211 and the second screening plate 212. A round tube 213 is symmetrically installed on the side wall of the first screening plate frame 211, and the round tube 213 is rotatably connected in the rotating hole.

[0052] A first sliding groove 214 is provided on the inner wall of the first sieve plate frame 211, and the second sieve plate 212 is slidably connected in the first sliding groove 214. A plurality of springs 215 are abutting between one side of the inner wall of the first sieve plate frame 211 and one side of the outer wall of the second sieve plate 212.

[0053] A push pin is slidably connected inside the circular tube 213 located on the opposite side of the spring 215. One end of the push pin abuts against the side wall of the second sieve plate 212, and the other end is connected to the output end of the electric telescopic cylinder 24. The electric telescopic cylinder 24 is installed on the outer wall of the second housing 23.

[0054] One end of the first screen frame 211 overlaps the first discharge port 231.

[0055] Both the first screen frame 211 and the second screen plate 212 are provided with screen holes, and the second screen plate 212 is slidably connected to the first screen frame 211 through the first sliding groove 214. Therefore, the screen holes on the first screen frame 211 and the second screen plate 212 have overlapping parts. The size of the hole formed by the overlapping combination of the two screen holes determines the particle size of the screened steel slag.

[0056] When the electric telescopic cylinder 24 is working, it pushes the second screen plate 212 to slide along the first sliding groove 214 on the first screen plate frame 211 via a push pin. A spring 215 located on the other side of the second screen plate 212 serves to reset the second screen plate 212. The electric telescopic cylinder 24 automatically adjusts the size of the overlapping mesh openings on the first screen plate frame 211 and the second screen plate 212, enabling the separation of steel slag with different particle sizes.

[0057] Specifically, the eccentric wheel assembly 22 includes a motor 221 and an eccentric wheel 222. The motor 221 is mounted on the outer wall of the second housing 23, and the eccentric wheel 222 is rotatably connected to the inside of the second housing 23. The eccentric wheel 222 is driven to the output end of the motor 221, and the eccentric wheel 222 corresponds to the first sieve plate frame 211.

[0058] Specifically, a bucket elevator is provided at the first discharge port 231 for transporting steel slag back to the crushing box 1 for re-crushing. The bucket elevator is not shown in the diagram.

[0059] Steel slag that falls off the overlapping screen holes on the first screen frame 211 and the second screen plate 212 is transported out by an external belt conveyor or temporarily piled up for use in concrete preparation. Steel slag that does not fall off the first screen frame 211 and the second screen plate 212 enters the elevator through the first discharge port 231 and is transported back to the crushing box 1 for re-crushing.

[0060] Example 2: This example provides a working method for an automated control device for crushing and screening steel slag with different particle sizes as described in Example 1, including the following steps:

[0061] S1, Crushing particle size adjustment operation: The hydraulic telescopic cylinder 121 drives the second wedge block 122 to move downward along the vertical slide 132. When the second wedge block 122 moves downward along the vertical slide 132, it pushes the first wedge block 112 to move along the horizontal slide 131 toward the center of the first box 13. The first wedge block 112 drives the roller 111 to move synchronously.

[0062] S2, Screening particle size adjustment operation: When the electric telescopic cylinder 24 is working, it drives the ejector pin to move along the axial direction of the round tube 213. When the ejector pin moves, the second screen plate 212 slides along the first slide groove 214 under the action of the ejector pin and the spring 215. The screen holes on the second screen plate 212 and the screen holes on the first screen plate frame 211 are misaligned.

[0063] S3, cyclic processing operation: An external motor drives the rotating wheel 113 to rotate via a belt. When the rotating wheel 113 rotates, it drives the roller 111 to rotate. When the steel slag passes between the two oppositely arranged rollers 111, it is crushed by the rollers 111. The crushed steel slag falls onto the screening plate assembly 21. Steel slag with a particle size smaller than the screen hole size on the screening plate assembly 21 falls directly from the bottom of the screening box 2 into the external collection device. Steel slag with a particle size not smaller than the screen hole size on the screening plate assembly 21 falls from the first discharge port 231 into the bucket elevator and is transported back to the middle of the two oppositely arranged rollers 111 by the bucket elevator for crushing and screening again.

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0065] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An automated control device for crushing and screening steel slag of different particle sizes, characterized in that: The system includes a crushing box (1), a screening box (2) installed below the crushing box (1), a roller crushing assembly (11) and a displacement driving assembly (12) installed on the crushing box (1), the roller crushing assembly (11) being displaced under the drive of the displacement driving assembly (12); the roller crushing assembly (11) being displaced under the drive of the displacement driving assembly (12) to crush steel slag of different particle sizes; a screening plate assembly (21) and an eccentric wheel assembly (22) installed on the screening box (2), the screening plate assembly (21) vibrating under the drive of the eccentric wheel assembly (22); the size of the screen holes on the screening plate assembly (21) is controlled by an electric telescopic cylinder (24), and steel slag of different particle sizes is screened out by controlling the size of the screen holes on the screening plate assembly (21) through the electric telescopic cylinder (24); The crushing box (1) also includes a first box body (13), on which horizontal grooves (131) and vertical grooves (132) are symmetrically opened on the inner wall of the first box body (13). The roller crushing assembly (11) includes symmetrically arranged rollers (111). The two ends of the rollers (111) are equipped with first wedges (112) through bearings. The first wedges (112) are slidably connected in the horizontal slide groove (131). One end of the rollers (111) passes through the side wall of the first housing (13) and is connected to a wheel (113). The displacement drive assembly (12) includes a hydraulic telescopic cylinder (121) and a second wedge (122). The hydraulic telescopic cylinder (121) is installed on the top of the first housing (13). The second wedge (122) is slidably connected in the vertical slide groove (132). The output end of the hydraulic telescopic cylinder (121) is connected to the second wedge. The first wedge (112) and the second wedge (122) abut together. When the second wedge (122) moves downward along the vertical slide groove (132) under the drive of the hydraulic telescopic cylinder (121), the second wedge (122) pushes the first wedge (112) to move along the horizontal slide groove (131).

2. The automated control device for crushing and screening steel slag of different particle sizes according to claim 1, characterized in that: The screening box (2) includes a second box body (23), and rotating holes are symmetrically opened on the side wall of the second box body (23). A first discharge port (231) is also opened on the side wall of the second box body (23). The sieve plate assembly (21) includes a first sieve plate frame (211) and a second sieve plate (212). The first sieve plate frame (211) and the second sieve plate (212) are both provided with sieve holes. A round tube (213) is symmetrically installed on the side wall of the first sieve plate frame (211). The round tube (213) is rotatably connected in the rotating hole. The inner wall of the first sieve frame (211) is provided with a first sliding groove (214), and the second sieve plate (212) is slidably connected in the first sliding groove (214). Multiple springs (215) are abutted between one side of the inner wall of the first sieve frame (211) and one side of the outer wall of the second sieve plate (212). A push pin is slidably connected inside the round tube (213) located on the opposite side of the spring (215). One end of the push pin abuts against the side wall of the second sieve plate (212), and the other end is connected to the output end of the electric telescopic cylinder (24). The electric telescopic cylinder (24) is installed on the outer wall of the second housing (23). One end of the first screen frame (211) overlaps the first discharge port (231).

3. The automated control device for crushing and screening steel slag of different particle sizes according to claim 2, characterized in that: The eccentric wheel assembly (22) includes a motor (221) and an eccentric wheel (222). The motor (221) is mounted on the outer wall of the second housing (23). The eccentric wheel (222) is rotatably connected inside the second housing (23). The eccentric wheel (222) is driven to the output end of the motor (221). The eccentric wheel (222) corresponds to the first sieve plate frame (211).

4. The automated control device for crushing and screening steel slag of different particle sizes according to claim 2, characterized in that: A bucket elevator is provided at the first discharge port (231) for transporting steel slag back to the crushing box (1) for re-crushing.

5. A method for operating an automated control device for crushing and screening steel slag of different particle sizes as described in any one of claims 1-4, characterized in that, Includes the following steps: S1, Crushing particle size adjustment operation: The hydraulic telescopic cylinder (121) drives the second wedge (122) to move downward along the vertical slide (132). When the second wedge (122) moves downward along the vertical slide (132), it pushes the first wedge (112) to move along the horizontal slide (131) towards the center of the first box (13). The first wedge (112) drives the roller (111) to move synchronously. S2, Screening particle size adjustment operation: When the electric telescopic cylinder (24) is working, it drives the ejector pin to move axially along the round tube (213). When the ejector pin moves, the second screen plate (212) slides along the first slide groove (214) under the action of the ejector pin and the spring (215). The screen holes on the second screen plate (212) and the screen holes on the first screen plate frame (211) are misaligned. S3, cyclic processing operation: The external motor drives the rotating wheel (113) to rotate through the belt. When the rotating wheel (113) rotates, it drives the roller (111) to rotate. When the steel slag passes between the two oppositely arranged rollers (111), it is crushed by the rollers (111). The crushed steel slag falls on the screening plate assembly (21). The steel slag with a particle size smaller than the screen hole size on the screening plate assembly (21) falls directly from the bottom of the screening box (2) into the external collection device. The steel slag with a particle size not smaller than the screen hole size on the screening plate assembly (21) falls from the first discharge port (231) into the bucket elevator and is transported back to the middle of the two oppositely arranged rollers (111) by the bucket elevator for crushing and screening again.

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