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

Abstract

The invention discloses an automatic control device and method for crushing and screening steel slag 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, and a roller shaft crushing assembly and a displacement driving assembly are installed on the crushing box; the roll shaft crushing assembly is driven by the displacement driving assembly to move; a screening plate assembly and an eccentric wheel assembly are installed on the screening box, and the screening plate assembly is driven by the eccentric wheel assembly to vibrate. The working method comprises crushing particle size adjusting operation, screening particle size adjusting operation and circular processing operation, a displacement driving assembly drives a roll shaft crushing assembly to move, so that the distance between two oppositely-arranged roll shafts is adjusted, and the steel slag crushing effect is adjusted; and the screening plate assembly is driven by the electric telescopic cylinder, so that steel slag with different particle sizes is screened out. And automatic control over crushing and screening of the steel slag with different particle sizes is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of steel slag crushing, and in particular to an automatic control device and method for crushing and screening steel slag with different particle sizes. Background Art

[0002] Steel slag is an industrial solid waste discharged during the steelmaking process of the steel industry. The steel slag raw materials contain rich resources. According to the furnace type, it is divided into converter slag, open-hearth slag and electric furnace slag. It is mainly composed of calcium, iron, silicon, magnesium and a small amount of aluminum, manganese, phosphorus and other oxides. The amount of steel slag produced accounts for about 15% of the steel production. In 2020, the annual discharge of steel slag is about 160 million tons, accounting for about 24% of the total solid waste of the steel industry, and the comprehensive utilization rate is less than 40%. Therefore, the treatment and resource utilization of waste slag in steel enterprises are also receiving more and more attention.

[0003] Steel slag aggregate has the advantages of high strength, rough surface, good wear resistance and durability, large volume, good stability, etc. Compared with ordinary crushed stone, it also has the characteristics of low temperature cracking resistance. At present, steel slag is used in large quantities as coarse and fine aggregate, mainly used to prepare cement concrete or steel slag asphalt concrete, and can be widely used for backfilling in road projects.

[0004] However, the particle sizes of steel slag produced by steelmaking are different and do not meet the requirements of aggregate particle size gradation. Therefore, it cannot be directly used to prepare concrete, and the steel slag needs to be further crushed and screened. However, the existing steel slag crushing and screening devices, such as patent CN220443939U, although realizing the integrated setting of steel slag crushing and screening, cannot realize the automatic control of the crushed particle size and screening particle size of the steel slag. When it is necessary to produce steel slag of different particle sizes, it is still necessary to use a variety of production and processing equipment to work together, which increases the steel slag crushing process and production costs, and affects the large-scale utilization of steel slag.

[0005] Therefore, by adjusting the distance between each roller crushing assembly when crushing the slag, automatic control of the crushing particle size of the slag can be achieved; by adjusting the mesh size of the screen when screening the slag, automatic control of the screening particle size of the slag can be achieved; and by the cooperation of the crushing box, screening box and elevator, the slag that does not meet the aggregate particle size grading requirements can be cyclically crushed and screened, thereby realizing the automated production of slag with different particle sizes, which has become a difficult problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0006] The purpose of the present invention is to provide an automatic control device and method for crushing and screening steel slag of different particle sizes, so as to solve the problems that the existing steel slag crushing and screening device cannot automatically adjust the crushing particle size of the steel slag, cannot automatically adjust the screening particle size of the steel slag and cannot realize the cyclic crushing and screening operation of the steel slag.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] The present invention provides an automatic control device for crushing and screening steel slag with different particle sizes, comprising a crushing box, a screening box is installed below the crushing box, a roller crushing assembly and a displacement driving assembly are installed on the crushing box, the roller crushing assembly is displaced under the drive of the displacement driving assembly; the roller crushing assembly can crush steel slag with different particle sizes when 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 vibrates under the drive of the eccentric wheel assembly; the size of the sieve holes on the screening plate assembly is controlled by an electric telescopic cylinder, and the size of the sieve holes on the screening plate assembly is controlled by the electric telescopic cylinder to screen out steel slag with different particle sizes.

[0009] Specifically, the crushing box further comprises a first box body, and a horizontal slide groove and a vertical slide groove are symmetrically provided on the inner wall of the first box body;

[0010] The roller crushing assembly includes a symmetrically arranged roller, with first wedges installed at both ends of the roller through bearings, the first wedges are slidably connected in the horizontal slide, and one end of the roller passes through the side wall of the first box body and is connected to a rotating wheel.

[0011] Specifically, the displacement drive assembly includes a hydraulic telescopic cylinder and a second wedge block, the hydraulic telescopic cylinder is installed on the top of the first box body, the second wedge block is slidably connected in the vertical slide groove, the output end of the hydraulic telescopic cylinder is transmission-connected to the second wedge block, the first wedge block and the second wedge block are abutted together, and when the second wedge block moves downward along the vertical slide groove driven by the hydraulic telescopic cylinder, the second wedge block pushes the first wedge block to move along the horizontal slide groove.

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

[0013] The sieve plate assembly comprises a first sieve plate frame and a second sieve plate, the first sieve plate frame and the second sieve plate are both provided with sieve holes, and round tubes are symmetrically mounted on the side wall of the first sieve plate frame, and the round tubes are rotatably connected in the rotating holes;

[0014] A first slide groove is provided on the inner wall of the first screen plate frame, the second screen plate is slidably connected in the first slide groove, and a plurality of springs are abutted between an inner wall of one side of the first screen plate frame and an outer wall of one side of the second screen plate;

[0015] A thimble is slidably connected in the circular tube on the opposite side of the spring, one end of the thimble abuts against the side wall of the second sieve plate, and the other end is transmission-connected to the output end of the electric telescopic cylinder; the electric telescopic cylinder is installed on the outer wall of the second box body;

[0016] One end of the first screen plate frame is overlapped on 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 box body, the eccentric wheel is rotatably connected to the inside of the second box body, the eccentric wheel is transmission-connected to the output end of the motor, and the eccentric wheel corresponds to the first screen plate frame.

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

[0019] The present invention also provides a working method of the above-mentioned automatic control device for crushing and screening steel slag with different particle sizes, comprising the following steps:

[0020] S1, crushing particle size adjustment operation: the hydraulic telescopic cylinder drives the second wedge block to move downward along the vertical slide groove, and when the second wedge block moves downward along the vertical slide groove, it pushes the first wedge block to move along the horizontal slide groove toward the center of the first box body, and the first wedge block drives the roller shaft 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 round 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, cyclic processing operation: an external motor drives the wheel to rotate through a belt, and the rotation of the wheel drives the roller to rotate, and the slag is squeezed and crushed by the roller when passing through the middle of two oppositely arranged rollers; the crushed slag falls on the screening plate assembly, and the slag with a particle size smaller than the sieve hole size on the screening plate assembly directly falls from the bottom of the screening box into the external collecting device, and the slag with a particle size not smaller than the sieve 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 rollers through the bucket elevator for re-crushing and screening.

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

[0024] The present invention drives the roller crushing assembly to move by means of a displacement driving assembly, thereby adjusting the distance between two rollers that are arranged opposite to each other, thereby adjusting the crushing effect of the steel slag.

[0025] The present invention drives the screening plate assembly to move through the eccentric wheel assembly, thereby improving the screening effect of the steel slag.

[0026] The present invention drives the second screen plate to move in the first slide groove on the first screen plate frame through an electric telescopic cylinder, so that the screen holes on the first screen plate frame and the second screen plate can achieve dislocation movement, thereby realizing automatic adjustment of the screen hole size. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0029] Figure 2 A top view of the crushing box of the present invention;

[0030] Figure 3 It is a cross-sectional view taken along line AA of the present invention;

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

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

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

[0034] Description of reference numerals: 1. Crushing box; 2. Screening box;

[0035] 11. roller crushing assembly; 111. roller; 112. first wedge; 113. rotating wheel;

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

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

[0038] 23. second box body; 231. first discharge port;

[0039] 24. Electric telescopic cylinder;

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

[0041] 22. eccentric wheel assembly; 221. motor; 222. eccentric wheel. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 used to limit the present invention.

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

[0044] Specifically, the crushing box 1 further comprises a first box body 13, and a horizontal slide groove 131 and a vertical slide groove 132 are symmetrically provided on the inner wall of the first box body 13;

[0045] The roller crushing assembly 11 includes a symmetrically arranged roller 111, and first wedge blocks 112 are installed at both ends of the roller 111 through bearings. The first wedge block 112 is slidably connected in the horizontal slide groove 131, and one end of the roller 111 passes through the side wall of the first box body 13 and is connected to a rotating wheel 113.

[0046] When the first wedge 112 slides in the horizontal chute 131 , the distance between the two symmetrically arranged rollers 111 changes, thereby crushing slag into different particle sizes.

[0047] Specifically, an oblong hole for the end of the shaft 111 to move is formed on the side wall of the first box body 13 .

[0048] Specifically, the displacement drive assembly 12 includes a hydraulic telescopic cylinder 121 and a second wedge block 122. The hydraulic telescopic cylinder 121 is installed on the top of the first box body 13. The second wedge block 122 is slidably connected in the vertical slide groove 132. The output end of the hydraulic telescopic cylinder 121 is transmission-connected to the second wedge block. The first wedge block 112 and the second wedge block 122 are abutted against each other. When the second wedge block 122 moves downward along the vertical slide groove 132 driven by the hydraulic telescopic cylinder 121, the second wedge block 122 pushes the first wedge block 112 to move along the horizontal slide groove 131.

[0049] The hydraulic telescopic cylinder 121 drives the second wedge block 122 to slide in the vertical slide groove 132, driving the corresponding first wedge block 112 to slide in the horizontal slide groove 131, thereby realizing automatic control of the distance between the two symmetrically arranged rollers 111, so as to facilitate the device to crush steel slag of different particle sizes.

[0050] Specifically, the screening box 2 includes a second box body 23, and the side wall of the second box body 23 is symmetrically provided with rotation holes, and the side wall of the second box body 23 is also provided with a first discharge port 231;

[0051] The sieve plate assembly 21 comprises 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 circular tube 213 is symmetrically mounted on the side wall of the first sieve plate frame 211. The circular tube 213 is rotatably connected in the rotating hole.

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

[0053] A thimble is slidably connected in the circular tube 213 on the opposite side of the spring 215, one end of the thimble abuts against the side wall of the second sieve plate 212, and the other end is transmission-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 box body 23;

[0054] One end of the first screen plate frame 211 is overlapped on the first discharge port 231 .

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

[0056] When the electric telescopic cylinder 24 is working, the second screen plate 212 is pushed by the ejector pin to slide along the first slide groove 214 on the first screen plate frame 211, wherein the spring 215 arranged on the other side of the second screen plate 212 resets the second screen plate 212. The electric telescopic cylinder 24 is used to automatically adjust the size of the overlapping holes on the first screen plate frame 211 and the second screen plate 212, so as to screen out steel slag of different particle sizes.

[0057] Specifically, the eccentric wheel assembly 22 includes a motor 221 and an eccentric wheel 222. The motor 221 is installed on the outer wall of the second box body 23. The eccentric wheel 222 is rotatably connected to the inside of the second box body 23. The eccentric wheel 222 is transmission-connected to the output end of the motor 221. The eccentric wheel 222 corresponds to the first screen plate frame 211.

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

[0059] The steel slag that falls through the overlapping sieve holes on the first sieve plate frame 211 and the second sieve plate 212 is transported out through an external belt device or temporarily piled up for preparing concrete. The steel slag that does not fall through the first sieve plate frame 211 and the second sieve plate 212 enters the elevator through the first discharge port 231 and is transported back to the crushing box 1 through the elevator for re-crushing.

[0060] Embodiment 2: This embodiment provides a working method of the automatic control device for crushing and screening steel slag of different particle sizes as described in Embodiment 1, comprising the following steps:

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

[0062] S2, sieve 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 sieve plate 212 slides along the first slide groove 214 under the action of the ejector pin and the spring 215, and the sieve holes on the second sieve plate 212 and the sieve holes on the first sieve plate frame 211 are misaligned;

[0063] S3, cyclic processing operation: the external motor drives the rotating wheel 113 to rotate through the belt, and the rotating wheel 113 drives the roller 111 to rotate when rotating, and the steel slag is squeezed and crushed by the roller 111 when passing through the middle of the two oppositely arranged rollers 111; the crushed steel slag falls on the screening plate assembly 21, and the steel slag with a particle size smaller than the sieve hole size on the screening plate assembly 21 directly falls from the bottom of the screening box 2 into the external collecting device, and the steel slag with a particle size not smaller than the sieve 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 through the bucket elevator for re-crushing and screening.

[0064] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0065] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An automatic control device for crushing and screening steel slag of different particle sizes, characterized by: The invention comprises a crushing box (1), a screening box (2) being installed below the crushing box (1), a roller crushing assembly (11) and a displacement drive assembly (12) being installed on the crushing box (1), the roller crushing assembly (11) being displaced under the drive of the displacement drive assembly (12); when the roller crushing assembly (11) is displaced under the drive of the displacement drive assembly (12), steel slag of different particle sizes is crushed; a screening plate assembly (21) and an eccentric wheel assembly (22) are installed on the screening box (2), the screening plate assembly (21) vibrates under the drive of the eccentric wheel assembly (22); the size of the sieve holes on the screening plate assembly (21) is controlled by an electric telescopic cylinder (24), and the size of the sieve holes on the screening plate assembly (21) is controlled by the electric telescopic cylinder (24) to screen out steel slag of different particle sizes.

2. The automatic control device for crushing and screening steel slag of different particle sizes according to claim 1 is characterized in that: The crushing box (1) further comprises a first box body (13), wherein a horizontal slide groove (131) and a vertical slide groove (132) are symmetrically provided on the inner wall of the first box body (13); The roller crushing assembly (11) comprises a symmetrically arranged roller (111), with first wedge blocks (112) installed at both ends of the roller (111) via bearings, the first wedge block (112) being slidably connected in the horizontal slide groove (131), and one end of the roller (111) passing through the side wall of the first box body (13) being connected to a rotating wheel (113).

3. The automatic control device for crushing and screening steel slag of different particle sizes according to claim 2 is characterized in that: The displacement drive assembly (12) comprises a hydraulic telescopic cylinder (121) and a second wedge block (122). The hydraulic telescopic cylinder (121) is installed on the top of the first box body (13). The second wedge block (122) is slidably connected in the vertical slide groove (132). The output end of the hydraulic telescopic cylinder (121) is transmission-connected to the second wedge block. The first wedge block (112) and the second wedge block (122) are abutted against each other. When the second wedge block (122) moves downward along the vertical slide groove (132) driven by the hydraulic telescopic cylinder (121), the second wedge block (122) pushes the first wedge block (112) to move along the horizontal slide groove (131).

4. The automatic control device for crushing and screening steel slag of different particle sizes according to claim 2 is characterized in that: The screening box (2) comprises a second box body (23), the side wall of the second box body (23) is symmetrically provided with rotating holes, and the side wall of the second box body (23) is also provided with a first discharge port (231); The sieve plate assembly (21) comprises a first sieve plate frame (211) and a second sieve plate (212), wherein the first sieve plate frame (211) and the second sieve plate (212) are both provided with sieve holes, and round tubes (213) are symmetrically mounted on the side walls of the first sieve plate frame (211), wherein the round tubes (213) are rotatably connected in the rotating holes; A first slide groove (214) is provided on the inner wall of the first screen plate frame (211), the second screen plate (212) is slidably connected in the first slide groove (214), and a plurality of springs (215) are abutted between an inner wall of one side of the first screen plate frame (211) and an outer wall of one side of the second screen plate (212); A thimble is slidably connected in the circular tube (213) located on the opposite side of the spring (215); one end of the thimble abuts against the side wall of the second sieve plate (212), and the other end is drivingly 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 box body (23); One end of the first screen plate frame (211) is overlapped on the first discharge port (231).

5. The automatic control device for crushing and screening steel slag of different particle sizes according to claim 4 is characterized in that: The eccentric wheel assembly (22) comprises 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 to the interior of the second housing (23); the eccentric wheel (222) is transmission-connected to the output end of the motor (221); the eccentric wheel (222) corresponds to the first screen plate frame (211).

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

7. A working method using the automatic control device for crushing and screening steel slag of different particle sizes according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, crushing particle size adjustment operation: the hydraulic telescopic cylinder (121) works to drive the second wedge block (122) to move downward along the vertical slide groove (132), and when the second wedge block (122) moves downward along the vertical slide groove (132), it pushes the first wedge block (112) to move along the horizontal slide groove (131) toward the center of the first box body (13), and the first wedge block (112) drives the roller shaft (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 circular tube (213). When the ejector pin moves, the second sieve plate (212) slides along the first slide groove (214) under the action of the ejector pin and the spring (215), and the sieve holes on the second sieve plate (212) and the sieve holes on the first sieve plate frame (211) are misaligned; S3, cyclic processing operation: the external motor drives the rotating wheel (113) to rotate through the belt, and the rotating wheel (113) drives the roller (111) to rotate when rotating, and the steel slag is squeezed and crushed by the roller (111) when passing through the middle of the two rollers (111) arranged opposite to each other; the crushed steel slag falls on the screening plate assembly (21), and the steel slag with a particle size smaller than the size of the sieve holes on the screening plate assembly (21) directly falls from the bottom of the screening box (2) into the external collecting device, and the steel slag with a particle size not smaller than the size of the sieve holes 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 rollers (111) arranged opposite to each other through the bucket elevator to be crushed and screened again.

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