A crushing and screening device for iron powder production

Abstract

This utility model discloses an iron powder production crushing and screening device, relating to the field of iron powder production technology. It includes a crushing and screening box, a crushing unit, a screening and filtering unit, and a reflux unit. The crushing and screening unit are installed inside the crushing and screening box, and the reflux unit is installed outside the crushing and screening box. The crushing unit includes a motor, a connecting rod, a limiting cylinder, a grinding cone, a conical groove, and a circular protrusion. The motor is fixedly connected to the upper center of the crushing and screening box, and the output shaft of the motor is fixedly connected to the upper end of the connecting rod. The connecting rod is rotatably connected to the upper end of the crushing and screening box, and the limiting cylinder is slidably connected to the outer side of the connecting rod. This iron powder production crushing and screening device can achieve adjustable crushing precision. Combined with the circular protrusion on the surface, it improves crushing efficiency, increases raw material utilization, and significantly reduces screen replacement and maintenance time.

Description

Technical Field

[0001] This utility model relates to the field of iron powder production, and in particular to an iron powder crushing and screening device. Background Technology

[0002] In the preparation of iron concentrate, after the first reduction, the iron powder from the first reduction is sent to the steel strip furnace for a second reduction. It reacts with the hydrogen produced by the ammonia decomposition equipment to reduce the trace oxygen and carbon in the iron powder from the first reduction. At a high temperature of over 900℃, the purpose of deoxidation and decarburization is achieved to improve the iron purity. The reduced iron powder is in block form and needs to be crushed into appropriate particle size before it can be turned into finished products for packaging.

[0003] Among the existing technologies, the iron powder production crushing and screening device proposed in the authorization announcement number CN220111168U includes a collection box and a recycling box; the collection box is used to support the components of this device, the recycling box is connected to the side of the collection box, the collection box is provided with a raw material crushing component and an iron powder particle screening component, and a secondary crushing component is provided inside the collection box.

[0004] Existing traditional crushing devices mostly adopt a planar grinding structure, resulting in a small grinding contact area and low crushing efficiency. At the same time, they lack a precise gap adjustment mechanism, making it impossible to adjust the crushed particle size according to needs and failing to meet the production requirements of iron powder of different specifications. Existing screening equipment uses a planar screen design, which is prone to material accumulation and blockage. The screen replacement process is complicated and time-consuming, which seriously affects production efficiency. The lack of an automatic recovery system for unqualified particles leads to raw material waste. Therefore, we propose an iron powder production crushing and screening device. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide an iron powder production crushing and screening device that can achieve adjustable crushing precision. With the help of the circular protrusions on the surface, the crushing efficiency is improved. At the same time, it can improve the utilization rate of raw materials and significantly reduce the replacement and maintenance time of the screen, which can effectively solve the problems in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an iron powder production crushing and screening device, comprising a crushing and screening box, a crushing unit, a screening and filtering unit, and a reflux unit;

[0007] Crushing and screening box: The inner side is equipped with a crushing unit and a screening and filtering unit, and the outer side of the crushing and screening box is equipped with a reflux unit;

[0008] The crushing unit includes a motor, a connecting rod, a limiting cylinder, a grinding cone, a conical groove, and circular protrusions. The motor is fixedly connected to the upper center of the crushing and screening box. The output shaft of the motor is fixedly connected to the upper end of the connecting rod. The connecting rod is rotatably connected to the upper end of the crushing and screening box. The limiting cylinder is slidably connected to the outer side of the connecting rod. The grinding cone is fixedly connected to the lower end of the limiting cylinder. A conical groove is fixedly connected to the inner center of the crushing and screening box. Multiple circular protrusions are provided on the outer side of the grinding cone and on the inner side of the conical groove.

[0009] The device integrates crushing and screening functions through a crushing and screening box. In the crushing unit, a motor drives a connecting rod to rotate a grinding cone. The grinding cone and the circular protrusions on the surface of the conical groove mutually compress and crush the iron powder. The conical structure causes the gap between the grinding cone and the conical groove to tighten downwards, and the circular protrusions on the surface gradually compress and crush the iron powder.

[0010] Furthermore, the crushing unit also includes a telescopic rod, a self-locking electric telescopic rod, a connecting plate, and a feed inlet. The self-locking electric telescopic rod is fixedly connected to the upper right side of the inner side of the crushing and screening box, and a telescopic rod is fixedly connected to the upper left side of the inner side of the crushing and screening box. A limit cylinder is rotatably connected to the middle of the inner side of the connecting plate. The right end of the connecting plate is fixedly connected to the lower end of the self-locking electric telescopic rod, and a telescopic rod is fixedly connected to the left end of the connecting plate. A feed inlet is provided on the left side of the outer side of the crushing and screening box.

[0011] The self-locking electric telescopic rod works in conjunction with the telescopic rod to adjust the height of the connecting plate, thereby controlling the gap between the grinding cone and the conical groove; the feed inlet enables continuous feeding, the electric adjustment has high precision, and the self-locking function keeps the gap stable, adapting to different particle size crushing needs.

[0012] Furthermore, the screening and filtering unit includes a second connecting rod, a second limiting cylinder, a fixed plate, and a scraper. The second connecting rod is fixedly connected to the middle of the lower outer side of the grinding cone. The second limiting cylinder is slidably connected to the outer side of the second connecting rod. The fixed plate is fixedly connected to the lower inner side of the crushing and screening box. The fixed plate is rotatably connected to the upper outer side of the second limiting cylinder. The scraper is fixedly connected to the outer side of the second limiting cylinder.

[0013] The second connecting rod rotates with the grinding cone, driving the second limiting cylinder and the scraper to scrape the surface of the conical filter screen. The fixed plate provides support, the scraper prevents the screen from clogging, and the rotation linkage design reduces additional power consumption.

[0014] Furthermore, the screening and filtering unit also includes a conical filter screen and a conical collecting hopper. The conical filter screen is threadedly connected to the lower inner side of the crushing and screening box, and the conical collecting hopper is threadedly connected to the lower outer side of the crushing and screening box. A solenoid valve is installed at the lower inner end of the conical collecting hopper.

[0015] The conical filter screen filters qualified iron powder into a conical collection hopper, and the discharge is controlled by a solenoid valve; the threaded connection facilitates disassembly and replacement of the conical filter screen, the conical screen extends the material residence time, the solenoid valve enables precise material control, and the modular design facilitates maintenance.

[0016] Furthermore, the reflux unit includes a cylindrical cylinder, a second motor, an auger, and a reflux cylinder. The cylindrical cylinder is fixedly connected to the right end of the crushing and screening box. An auger is rotatably connected to the inner side of the cylindrical cylinder. The second motor is fixedly connected to the upper end of the cylindrical cylinder. The output shaft of the second motor is fixedly connected to the auger. The lower end of the cylindrical cylinder is connected to the inner conical groove and the upper side of the conical filter screen of the crushing and screening box. One end of the reflux cylinder is connected to the upper side of the cylindrical cylinder, and the other end of the reflux cylinder is connected to the upper part of the inner conical groove of the crushing and screening box.

[0017] A circular cylinder is fixed to the right end of the crushing and screening box, with an auger installed inside and a second motor fixed to the top. The lower end of the circular cylinder is connected to the crushing and screening box, and the upper end is connected to the upper part of the conical groove via a return cylinder. The second motor drives the auger to send the substandard iron powder back to the conical groove for secondary crushing via the return cylinder. The closed-loop return improves the utilization rate of raw materials, and the auger conveying is efficient and prevents clogging.

[0018] Furthermore, it also includes support legs, with three support legs fixedly connected to the lower outer side of the crushing and screening box.

[0019] Three support legs are fixed to the lower outer side of the crushing and screening box. The support legs provide stable support for the equipment. The three-point support ensures stability, facilitates the installation and fixing of the equipment, and leaves room for operation at the bottom.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This iron powder production crushing and screening device has the following advantages:

[0021] 1. This iron powder production crushing and screening device adopts a conical grinding structure. The grinding cone is driven by a motor to crush the iron powder by mutual squeezing with the circular protrusions of the conical groove. The self-locking electric telescopic rod and the telescopic rod work together to control the grinding gap, so as to achieve adjustable crushing accuracy. In conjunction with the circular protrusions on the surface, the crushing efficiency is improved.

[0022] 2. This iron powder production crushing and screening device features an innovative combination of a conical filter screen and a rotating scraper. The screen aperture is replaceable, and the scraper speed is synchronized with the grinding process, effectively preventing screen clogging. The auger reflux system automatically sends substandard particles back to the grinding area. Combined with a solenoid valve, this improves raw material utilization and significantly reduces screen replacement and maintenance time. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the internal cross-sectional structure of this utility model.

[0025] Figure 3 This utility model Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0026] Explanation of reference numerals in the attached drawings: 1. Crushing and screening box; 2. Support leg; 3. Crushing unit; 31. Motor 1; 32. Connecting rod 1; 33. Telescopic rod; 34. Self-locking electric telescopic rod; 35. Connecting plate; 36. Limiting cylinder 1; 37. Grinding cone; 38. Conical groove; 39. Circular protrusion; 310. Feed inlet; 4. Screening and filtering unit; 41. Connecting rod 2; 42. Limiting cylinder 2; 43. Fixing plate; 44. Scraper; 45. Conical filter screen; 46. Conical collection hopper; 5. Return unit; 51. Circular cylinder; 52. Motor 2; 53. Screwdriver; 54. Return cylinder. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-3 This embodiment provides a technical solution, which includes a crushing and screening box 1, a crushing unit 3, a screening and filtering unit 4, and a reflux unit 5.

[0029] Crushing and screening box 1: The inner side is equipped with crushing unit 3 and screening and filtering unit 4, and the outer side of crushing and screening box 1 is equipped with reflux unit 5.

[0030] Crushing Unit 3: Includes motor 31, connecting rod 32, limiting cylinder 36, grinding cone 37, conical groove 38, and circular protrusions 39. Motor 31 is fixedly connected to the upper middle part of crushing and screening box 1. The output shaft of motor 31 is fixedly connected to the upper end of connecting rod 32. Connecting rod 32 is rotatably connected to the upper end of crushing and screening box 1. Limiting cylinder 36 is slidably connected to the outer side of connecting rod 32. Grinding cone 37 is fixedly connected to the lower end of limiting cylinder 36. Conical groove 38 is fixedly connected to the middle part of the inner side of crushing and screening box 1. Multiple circular protrusions 39 are provided on the outer side of grinding cone 37 and multiple circular protrusions 39 are provided on the inner side of conical groove 38.

[0031] The device integrates crushing and screening functions through the crushing and screening box 1. In the crushing unit 3, the motor 31 drives the connecting rod 32 to rotate the grinding cone 37. The grinding cone 37 and the circular protrusions 39 on the surface of the conical groove 38 mutually crush the iron powder. The conical structure makes the gap between the grinding cone 37 and the conical groove 38 tighten downward, and the iron powder is gradually crushed by the circular protrusions 39 on the surface.

[0032] The crushing unit 3 also includes a telescopic rod 33, a self-locking electric telescopic rod 34, a connecting plate 35, and a feed inlet 310. The self-locking electric telescopic rod 34 is fixedly connected to the upper right side of the inner side of the crushing and screening box 1, and the telescopic rod 33 is fixedly connected to the upper left side of the inner side of the crushing and screening box 1. The limiting cylinder 36 is rotatably connected to the middle of the inner side of the connecting plate 35. The right end of the connecting plate 35 is fixedly connected to the lower end of the self-locking electric telescopic rod 34, and the telescopic rod 33 is fixedly connected to the left end of the connecting plate 35. The feed inlet 310 is provided on the left side of the outer side of the crushing and screening box 1.

[0033] The self-locking electric telescopic rod 34 and the telescopic rod 33 work together to adjust the height of the connecting plate 35, thereby controlling the gap between the grinding cone 37 and the conical groove 38; the feed inlet 310 enables continuous feeding, the electric adjustment has high precision, and the self-locking function keeps the gap stable, adapting to different particle size crushing needs.

[0034] The screening and filtering unit 4 includes a connecting rod 41, a limiting cylinder 42, a fixing plate 43, and a scraper 44. The connecting rod 41 is fixedly connected to the middle of the lower outer side of the grinding cone 37. The limiting cylinder 42 is slidably connected to the outer side of the connecting rod 41. The fixing plate 43 is fixedly connected to the lower inner side of the crushing and screening box 1. The fixing plate 43 is rotatably connected to the upper outer side of the limiting cylinder 42. The scraper 44 is fixedly connected to the outer side of the limiting cylinder 42.

[0035] The connecting rod 41 rotates with the grinding cone 37, driving the limiting cylinder 42 and the scraper 44 to scrape the surface of the conical filter screen 45. The fixed plate 43 provides support, and the scraper 44 prevents the screen from clogging. The rotation linkage design reduces additional power consumption.

[0036] The screening and filtering unit 4 also includes a conical filter screen 45 and a conical collection hopper 46. The conical filter screen 45 is threadedly connected to the lower inner side of the crushing and screening box 1, and the conical collection hopper 46 is threadedly connected to the lower outer side of the crushing and screening box 1. A solenoid valve is installed at the lower inner side of the conical collection hopper 46.

[0037] The conical filter screen 45 filters qualified iron powder into the conical collection hopper 46, and the solenoid valve controls the discharge; the threaded connection makes it easy to disassemble and replace the conical filter screen 45, the conical screen extends the material residence time, the solenoid valve achieves precise material control, and the modular design facilitates maintenance.

[0038] The reflux unit 5 includes a cylindrical cylinder 51, a second motor 52, an auger 53, and a reflux cylinder 54. The cylindrical cylinder 51 is fixedly connected to the right end of the crushing and screening box 1. The auger 53 is rotatably connected to the inner side of the cylindrical cylinder 51. The second motor 52 is fixedly connected to the upper end of the cylindrical cylinder 51. The output shaft of the second motor 52 is fixedly connected to the auger 53. The lower end of the cylindrical cylinder 51 is connected to the upper side of the inner conical groove 38 and the conical filter screen 45 of the crushing and screening box 1. One end of the reflux cylinder 54 is connected to the upper side of the cylindrical cylinder 51, and the other end of the reflux cylinder 54 is connected to the upper part of the inner conical groove 38 of the crushing and screening box 1.

[0039] A circular cylinder 51 is fixed to the right end of the crushing and screening box 1, with an auger 53 installed inside and a motor 52 fixed to the upper end. The lower end of the circular cylinder is connected to the crushing and screening box, and the upper end is connected to the upper part of the conical groove 38 via a return cylinder 54. The motor 52 drives the auger 53 to send the substandard iron powder back to the conical groove 38 for secondary crushing via the return cylinder 54. The closed-loop return improves the utilization rate of raw materials, and the auger 53 is efficient and anti-clogging.

[0040] It also includes support legs 2. Three support legs 2 are fixedly connected to the lower outer side of the crushing and screening box 1. The three support legs 2 provide stable support for the equipment. The three-point support ensures stability, facilitates the installation and fixing of the equipment, and leaves room for bottom operation.

[0041] The working principle of the wastewater treatment device for environmental protection provided by this utility model is as follows: During operation, iron powder raw material is first fed into the feed inlet 310. The motor 31 is started to drive the connecting rod 32 to rotate the grinding cone 37. The circular protrusions 39 on its surface and the protrusions of the conical groove 38 are used to crush the iron powder by mutual squeezing. At the same time, the gap of the grinding cone 37 is adjusted by the self-locking electric telescopic rod 34 and the telescopic rod 33 to control the crushing particle size. The crushed material falls into the conical filter screen 45. The connecting rod 41 drives the limiting cylinder 42 and the scraper 44 to rotate and scrape the screen surface to prevent blockage. Qualified iron powder passes through the screen and enters the conical collection hopper 46, and the discharge is controlled by the solenoid valve. The powder that does not meet the standard enters through the lower end of the circular cylinder 51. The motor 52 is started to drive the auger 53 to transport it back to the upper part of the conical groove 38 through the return cylinder 54 for secondary crushing to ensure that the raw material is fully utilized. Throughout the process, the support leg 2 provides stable support, and the equipment realizes a continuous closed-loop operation of crushing, screening and return.

[0042] It is worth noting that, in the above embodiments, the input terminals of the self-locking motor 31, the self-locking electric telescopic rod 34, and the motor 52 are electrically connected to the output terminal of an external power supply through an external PLC controller. The motor 31 and the motor 52 are servo motors, and the external PLC controller controls the operation of the motor 31, the self-locking electric telescopic rod 34, and the motor 52 using methods commonly used in the prior art.

[0043] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A mill crusher screening device for iron powder production, characterized by: It includes a crushing and screening box (1), a crushing unit (3), a screening and filtering unit (4), and a reflux unit (5); Crushing and screening box (1): The inner side is equipped with a crushing unit (3) and a screening and filtering unit (4), and the outer side of the crushing and screening box (1) is equipped with a reflux unit (5); The crushing unit (3) includes a motor (31), a connecting rod (32), a limiting cylinder (36), a grinding cone (37), a conical groove (38), and a circular protrusion (39). The upper middle part of the crushing and screening box (1) is fixedly connected to the motor (31). The output shaft of the motor (31) is fixedly connected to the upper end of the connecting rod (32). The connecting rod (32) is rotatably connected to the upper end of the crushing and screening box (1). The outer side of the connecting rod (32) is slidably connected to the limiting cylinder (36). The lower end of the limiting cylinder (36) is fixedly connected to the grinding cone (37). The inner middle part of the crushing and screening box (1) is fixedly connected to the conical groove (38). The outer side of the grinding cone (37) is provided with multiple circular protrusions (39). The inner side of the conical groove (38) is provided with multiple circular protrusions (39).

2. A disintegrating screen device for iron powder production according to claim 1, characterized in that: The crushing unit (3) also includes a telescopic rod (33), a self-locking electric telescopic rod (34), a connecting plate (35), and a feed inlet (310). The self-locking electric telescopic rod (34) is fixedly connected to the upper right side of the inner side of the crushing and screening box (1). The telescopic rod (33) is fixedly connected to the upper left side of the inner side of the crushing and screening box (1). The limiting cylinder (36) is rotatably connected to the middle of the inner side of the connecting plate (35). The right end of the connecting plate (35) is fixedly connected to the lower end of the self-locking electric telescopic rod (34). The telescopic rod (33) is fixedly connected to the left end of the connecting plate (35). The feed inlet (310) is provided on the left side of the outer side of the crushing and screening box (1).

3. A disintegrating screen device for iron powder production according to claim 2, characterized in that: The screening and filtering unit (4) includes a connecting rod (41), a limiting cylinder (42), a fixing plate (43), and a scraper (44). The connecting rod (41) is fixedly connected to the middle of the lower outer side of the grinding cone (37). The limiting cylinder (42) is slidably connected to the outer side of the connecting rod (41). The fixing plate (43) is fixedly connected to the lower inner side of the crushing and screening box (1). The fixing plate (43) is rotatably connected to the upper outer side of the limiting cylinder (42). The scraper (44) is fixedly connected to the outer side of the limiting cylinder (42).

4. A disintegrating screen device for iron powder production according to claim 3, characterized in that: The screening and filtering unit (4) also includes a conical filter screen (45) and a conical collection hopper (46). The conical filter screen (45) is threadedly connected to the lower inner side of the crushing and screening box (1), and the conical collection hopper (46) is threadedly connected to the lower outer side of the crushing and screening box (1). A solenoid valve is installed on the lower inner side of the conical collection hopper (46).

5. A disintegrating screen device for iron powder production according to claim 1, characterized in that: The reflux unit (5) includes a cylindrical cylinder (51), a second motor (52), an auger (53), and a reflux cylinder (54). The cylindrical cylinder (51) is fixedly connected to the right end of the crushing and screening box (1). The auger (53) is rotatably connected to the inner side of the cylindrical cylinder (51). The second motor (52) is fixedly connected to the upper end of the cylindrical cylinder (51). The output shaft of the second motor (52) is fixedly connected to the auger (53). The lower end of the cylindrical cylinder (51) is connected to the inner conical groove (38) and the upper side of the conical filter screen (45) of the crushing and screening box (1). One end of the reflux cylinder (54) is connected to the upper side of the cylindrical cylinder (51), and the other end of the reflux cylinder (54) is connected to the upper part of the inner conical groove (38) of the crushing and screening box (1).

6. A disintegrating screen device for iron powder production according to claim 1, characterized in that: It also includes support legs (2), and three support legs (2) are fixedly connected to the lower outer side of the crushing and screening box (1).

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