Pulverizer with screen convenient to replace

Abstract

The utility model relates to the technical field of crushers, in particular to a crusher with a screen convenient to replace, which comprises a mounting frame and a crushing box mounted on the mounting frame, openings are formed in the front side and the rear side of the crushing box, a feeding hopper is mounted at the top end of the crushing box, a discharging hopper is mounted at the bottom of the crushing box, and supporting rods are mounted on two sides of the mounting frame respectively. The outer surfaces of the two supporting rods are slidably connected with box doors capable of moving left and right correspondingly, and the box doors are matched with the smashing box. According to the device, through cooperation of a supporting plate, an inclined plate, a protruding plate, a hoop rod and a fastening bolt, mounting and dismounting of a screen become simple and convenient, when the screen is damaged or screens with different hole diameters need to be replaced, replacement operation can be rapidly completed, the working efficiency is improved, the box door is of a slidable structure, and the box door is convenient to use. And opening, closing and fixing are realized through parts such as a bolt plate, a positioning rod and a fixing plate, so that a worker can conveniently open the box door to inspect internal parts of the equipment, and the maintainability of the equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of pulverizer technology, and in particular to a pulverizer with an easy-to-replace screen. Background Technology

[0002] In modern industrial production and many other fields, crushers play a crucial role, especially in ore crushing during mining to facilitate subsequent mineral processing. Traditional crushers typically consist of a machine body, crushing device, power system, and screens. However, most existing crushers present significant inconveniences in screen replacement. Firstly, screens are often fixed inside the machine body via complex bolt connections, welding, or embedding. When screens wear out or break after prolonged use and require replacement, operators must expend considerable time and effort disassembling various connecting parts. This not only demands specialized tool usage skills but also often presents significant difficulties due to limited operating space and rusted connecting parts, greatly impacting production efficiency. Secondly, the cumbersome nature of screen replacement prevents companies from responding promptly to urgent production changes requiring rapid adjustments to screen specifications to accommodate different material particle size requirements, thus delaying production cycles and increasing costs.

[0003] A search of Chinese utility model patent CN213528886U reveals a pulverizer with an easily replaceable screen, comprising a base, a motor, and a pulverizing chamber. Two sets of threaded holes are provided on one side of the pulverizing chamber, with a limiting groove between them. The pulverizing chamber also has a limiting groove, and a mounting frame is movably mounted on it. A handle is fixed to the middle of the side of the mounting frame away from the pulverizing chamber. A groove is provided on one side of the upper surface of the limiting groove, and a mounting groove is provided on the upper surface of the mounting frame. A screen is mounted on the mounting frame, and the pulverizing chamber and the mounting frame are fixed together by a screw bolt. One end of the screw bolt passes through the through hole and is installed inside the threaded hole. After the screen is completely detached from the pulverizing chamber, it can be easily and conveniently removed from the mounting frame for replacement because it is fixed by the mounting groove on the mounting frame.

[0004] The above-mentioned device has the following technical defects:

[0005] Although the screen in the above-mentioned device is mounted on the mounting frame via a mounting groove, the high-speed rotation of the crushing roller during the crushing process causes strong vibrations inside the crushing chamber. This vibration can easily cause the screen to shift within the mounting groove, affecting its normal screening function. For example, it can cause the screen to warp, allowing some substandard material to flow out through the gaps in the warped area, thus reducing screening quality. Furthermore, warped screen edges can easily collide with the crushing mechanism, affecting its normal operation and creating a series of safety hazards.

[0006] In conclusion, existing crushers with easily replaceable screens still have significant technical shortcomings. Therefore, it is necessary to provide a new type of crusher with easily replaceable screens. Utility Model Content

[0007] This utility model addresses the shortcomings of existing technologies by providing a pulverizer with an easy-to-replace screen, effectively solving the technical defects of existing pulverizers with easy-to-replace screens.

[0008] To solve the above problems, the technical solution adopted by this utility model is: a crusher with easy screen replacement, including a mounting frame and a crushing box mounted on the mounting frame. The crushing box has openings on the front and rear sides, a feed hopper is installed at the top of the crushing box, and a discharge hopper is installed at the bottom of the crushing box. Support rods are installed on both sides of the mounting frame, and the outer surfaces of the two support rods are slidably connected to left and right movable box doors. The box doors are adapted to the crushing box. A crushing mechanism is installed inside the crushing box, and a transmission mechanism for driving the crushing mechanism is installed on the mounting frame. A detachable screen is installed inside the crushing box.

[0009] Preferably, the transmission mechanism includes a motor mounted on a mounting frame, a first pulley fixedly connected to the output end of the motor, and a second pulley for driving the crushing mechanism mounted on the outer surface of the crushing box, wherein the first pulley and the second pulley are connected by a transmission belt.

[0010] Preferably, two bolt plates are hinged to the left and right sides of the two boxes respectively, and four positioning rods are evenly distributed on the outer surfaces of the left and right sides of the crushing box. The bolt plates are respectively provided with slots that are adapted to the positioning rods, and fixing plates for limiting the bolt plates are respectively installed on the outer surfaces of the left and right sides of the boxes.

[0011] Preferably, a fixing frame is fixedly connected to the bottom end of the door, the fixing frame is slidably connected to the outer surface of the support rod, at least two pulleys are installed on the inner wall of the fixing frame, the pulleys are slidably connected to the outer surface of the support rod, a stop bar is installed on the left and right sides of the mounting frame respectively, and at least two limiting plates are installed on the side of the fixing frame near the stop bar, the limiting plates are provided with grooves that are adapted to the stop bar.

[0012] Preferably, support plates are installed on the front and rear sides of the crushing mechanism, the two support plates are fixed to the inner wall of the crushing box, the top of the two support plates are respectively fixed to an inclined plate that tilts towards one side of the crushing mechanism, the bottom of the two inclined plates are fixed to one-quarter of the width of the support plate, a screen is installed at the bottom of the crushing mechanism, and a convex plate is installed on both sides of the top of the screen, the convex plate is installed at the angle between the inclined plate and the support plate.

[0013] Preferably, one of the two support plates has multiple hinge blocks installed at its bottom, and the inner walls of the multiple hinge blocks are respectively hinged with semi-circular hoops. The other end of the hoops abuts against the bottom surface of the other support plate, and the outer surface of the hoops contacts the bottom surface of the screen. The end of the hoops away from the hinge blocks is threadedly connected to the support plate by fastening bolts.

[0014] Preferably, the plurality of the hoops are connected by crossbars.

[0015] This utility model has a novel structure, ingenious design, and is simple and convenient to operate. Compared with the prior art, it has the following advantages:

[0016] 1. This device, through the cooperation of support plates, inclined plates, convex plates, hoops, and fastening bolts, makes the installation and disassembly of the screen simple and convenient. When the screen is damaged or needs to be replaced with a screen of a different aperture, the replacement operation can be completed quickly, reducing equipment maintenance time and improving work efficiency. The two sides of the top of the screen are engaged with the angle between the support plate and the inclined plate by the convex plates, and the bottom of the screen is fixed by the hoops, which further increases the stability of the device and avoids the screen from warping in the working pool, thus further improving the safety of the device.

[0017] 2. The door of this device adopts a sliding structure and is opened and closed and fixed by components such as bolt plates, positioning rods and fixing plates, which makes it convenient for staff to open the door to inspect, repair and clean the crushing mechanism, screen and other components inside the equipment, thus improving the maintainability of the equipment. Attached Figure Description

[0018] Figure 1 This is a perspective view of a crusher with an easy-to-replace screen according to the present invention.

[0019] Figure 2 This is a schematic diagram of the door structure of a crusher with an easy-to-replace screen, according to the present invention.

[0020] Figure 3 This is a schematic diagram of the screen installation structure of a crusher that facilitates screen replacement, according to the present invention.

[0021] 1-Mounting frame, 2-Grinding box, 3-Box door, 4-Feed hopper, 5-Discharge hopper, 6-Motor, 7-Support rod, 8-Stop bar, 9-Positioning rod, 10-First pulley, 11-Second pulley, 12-Bolt plate, 13-Fixing plate, 14-Pull handle, 15-Fixing frame, 16-Pulley, 17-Limiting plate, 18-Grinding mechanism, 19-Inclined plate, 20-Support plate, 21-Screen, 22-Hinge block, 23-Holding rod, 24-Fasting bolt. Detailed Implementation

[0022] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] like Figure 1-3 As shown, this utility model provides a crusher with an easy-to-replace screen, including a mounting frame 1 and a crushing box 2 mounted on the mounting frame 1. The crushing box 2 has openings on both the front and rear sides. A feed hopper 4 is installed at the top of the crushing box 2, and a discharge hopper 5 is installed at the bottom of the crushing box 2. Support rods 7 are respectively installed on both sides of the mounting frame 1. The outer surfaces of the two support rods 7 are respectively slidably connected to left and right movable box doors 3. The box doors 3 are adapted to the crushing box 2. A crushing mechanism 18 is installed inside the crushing box 2. A transmission mechanism for driving the crushing mechanism 18 is installed on the mounting frame 1. A detachable screen 21 is installed inside the crushing box 2.

[0024] The transmission mechanism includes a motor 6 mounted on a mounting frame 1. A first pulley 10 is fixedly connected to the output end of the motor 6. A second pulley 11 for driving the crushing mechanism 18 is mounted on the outer surface of the crushing box 2. The first pulley 10 and the second pulley 11 are connected by a transmission belt.

[0025] Two bolt plates 12 are hinged to the left and right sides of the two boxes 3 respectively. Four positioning rods 9 are evenly distributed on the outer surfaces of the left and right sides of the crushing box 2. The bolt plates 12 are respectively provided with slots that are adapted to the positioning rods 9. Fixing plates 13 for limiting the bolt plates 12 are respectively installed on the outer surfaces of the left and right sides of the boxes 3.

[0026] A fixing frame 15 is fixedly connected to the bottom end of the door 3. The fixing frame 15 is slidably connected to the outer surface of the support rod 7. At least two pulleys 16 are installed on the inner wall of the fixing frame 15. The pulleys 16 are slidably connected to the outer surface of the support rod 7. Stop bars 8 are installed on the left and right sides of the mounting frame 1 respectively. At least two limiting plates 17 are installed on the side of the fixing frame 15 near the stop bars 8. The limiting plates 17 have grooves that are adapted to the stop bars 8.

[0027] Support plates 20 are installed on the front and rear sides of the crushing mechanism 18. The two support plates 20 are fixed to the inner wall of the crushing box 2. The top of the two support plates 20 are respectively fixed to the inclined plates 19 that are inclined towards one side of the crushing mechanism 18. The bottom of the two inclined plates 19 is fixed at one-quarter of the width of the support plate 20. A screen 21 is installed at the bottom of the crushing mechanism 18. The top two sides of the screen 21 are respectively installed with protruding plates. The protruding plates are installed at the angle between the inclined plates 19 and the support plates 20.

[0028] One of the two support plates 20 has multiple hinge blocks 22 installed at its bottom. The inner walls of the multiple hinge blocks 22 are respectively hinged with semi-circular hoops 23. The other end of the hoop 23 abuts against the bottom surface of the other support plate 20. The outer surface of the hoop 23 contacts the bottom surface of the screen 21. The end of the hoop 23 away from the hinge block 22 is threadedly connected to the support plate 20 by a fastening bolt 24.

[0029] The plurality of the clamps 23 are connected by crossbars.

[0030] The working principle of the above device is as follows:

[0031] Material enters the crushing chamber 2 from the feed hopper 4. The motor 6 starts, and its output drives the first pulley 10 to rotate. The first pulley 10 drives the second pulley 11 to rotate via a transmission belt, thereby driving the crushing mechanism 18 to crush the material. The crushed material falls onto the screen 21. Material smaller than the screen aperture passes through the screen 21 and is discharged through the discharge hopper 5. Material larger than the screen aperture remains on the screen 21 and continues to be crushed by the crushing mechanism 18 until it can pass through the screen 21.

[0032] When it is necessary to open the box door 3 to replace the screen 21 or to perform internal maintenance, first release the limiting position of the bolt plate 12 and the positioning rod 9. The outer surface of the bolt plate 12 and the fixing plate 13 on the side away from the center of the crushing box will then contact each other, thus preventing the bolt plate 12 from obstructing the left and right movement of the box door 3 when it is moved. The fixing bracket 15 at the bottom of the box door 3 slides on the support rod 7 via the pulley 16, opening the box door 3 to both sides. After the box door 3 is fully opened, it can be tilted at a certain angle along the center of the support shaft. The tilted box door 3 is then restricted in position by the limiting plate 17 on the fixing bracket 15 cooperating with the stop bars 8 on both sides of the mounting bracket 1. When closing the box door 3, push the box door 3 towards the center, so that the slot on the bolt plate 12 engages with the positioning rod 9 on the outer surface of the crushing box 2, thereby achieving the purpose of closing the box door 3.

[0033] When installing the screen 21, place it between two support plates 20, with the convex plates on both sides of the top of the screen 21 positioned at the angle between the inclined plate 19 and the support plate 20. At this point, the bottom surface of the convex plate contacts the upper surface of the support plate 20, and the upper surface of the convex plate contacts the outer surface of the inclined plate 19, thus achieving initial positioning of the screen 21. Then, using a hoop 23 hinged to the bottom of one support plate 20, press the other end of the hoop 23 against the bottom surface of the other support plate 20, ensuring the outer surface of the hoop 23 contacts the bottom surface of the screen 21. Finally, secure the hoop 23 to the support plate 20 using bolts 24. Multiple hoops 23 are connected by crossbars to enhance stability. To disassemble the screen 21, simply unscrew the bolts 24 and loosen the hoop 23 to remove the screen 21.

[0034] The device features a special screen installation structure. The combination of support plate 20, inclined plate 19, convex plate, hoop 23, and fastening bolts 24 makes the installation and disassembly of screen 21 simple and convenient. When screen 21 is damaged or needs to be replaced with a screen of different aperture, the replacement operation can be completed quickly, reducing equipment maintenance time and improving work efficiency.

[0035] In this device, the crushed material can be effectively screened by the cooperation of the inclined plate 19 and the screen 21. Material smaller than the screen aperture can pass through the screen 21 smoothly and be discharged, while material larger than the screen aperture can continue to be crushed under the action of the crushing mechanism 18, ensuring that the particle size of the product meets the requirements.

[0036] In this device, the box door 3 adopts a sliding structure and is opened, closed and fixed by components such as bolt plate 12, positioning rod 9 and fixing plate 13, which makes it convenient for staff to open the box door 3 to inspect, repair and clean the crushing mechanism 18, screen 21 and other components inside the equipment, thus improving the maintainability of the equipment.

[0037] The fixing bracket 15 at the bottom of the box door 3 slides on the support rod 7 via pulleys 16, ensuring smooth and stable movement. Multiple clamps 23 are connected by crossbars, providing stable support when fixing the screen 21, ensuring the screen 21 remains in a stable position during operation. Furthermore, the multiple clamps 23 are connected by crossbars to form a single unit, allowing them to be fully opened at once, further improving operator efficiency.

[0038] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A pulverizer with an easy-to-replace screen, comprising a mounting frame (1) and a pulverizing box (2) mounted on the mounting frame (1), the pulverizing box (2) having openings on both the front and rear sides, a feed hopper (4) mounted on the top of the pulverizing box (2), and a discharge hopper (5) mounted on the bottom of the pulverizing box (2), characterized in that: Support rods (7) are installed on both sides of the mounting frame (1). The outer surfaces of the two support rods (7) are slidably connected to the left and right movable door (3). The door (3) is adapted to the crushing box (2). The crushing box (2) is equipped with a crushing mechanism (18). The mounting frame (1) is equipped with a transmission mechanism for driving the crushing mechanism (18). The crushing box (2) is equipped with a detachable screen (21).

2. The pulverizer with easily replaceable screen as described in claim 1, characterized in that: The transmission mechanism includes a motor (6) mounted on a mounting frame (1), the output end of the motor (6) is fixedly connected to a first pulley (10), and a second pulley (11) for driving the crushing mechanism (18) is mounted on the outer surface of the crushing box (2). The first pulley (10) and the second pulley (11) are connected by a transmission belt.

3. A pulverizer with an easily replaceable screen as described in claim 1, characterized in that: Two bolt plates (12) are hinged to the left and right sides of the two boxes (3). Four positioning rods (9) are evenly distributed on the outer surfaces of the left and right sides of the crushing box (2). The bolt plates (12) are respectively provided with slots that are compatible with the positioning rods (9). Fixing plates (13) for limiting the bolt plates (12) are respectively installed on the outer surfaces of the left and right sides of the boxes (3).

4. A pulverizer with an easily replaceable screen as described in claim 3, characterized in that: The bottom end of the box door (3) is fixedly connected to a fixing frame (15). The fixing frame (15) is slidably connected to the outer surface of the support rod (7). At least two pulleys (16) are installed on the inner wall of the fixing frame (15). The pulleys (16) are slidably connected to the outer surface of the support rod (7). Stop bars (8) are installed on the left and right sides of the mounting frame (1). At least two limiting plates (17) are installed on the side of the fixing frame (15) near the stop bar (8). The limiting plate (17) has a groove that matches the stop bar (8).

5. A pulverizer with an easily replaceable screen as described in claim 1, characterized in that: Support plates (20) are installed on the front and rear sides of the crushing mechanism (18). The two support plates (20) are fixed to the inner wall of the crushing box (2). The top of the two support plates (20) is fixed to the inclined plate (19) that is inclined towards the crushing mechanism (18). The bottom of the two inclined plates (19) is fixed at one-quarter of the width of the support plate (20). A screen (21) is installed at the bottom of the crushing mechanism (18). A convex plate is installed on both sides of the top of the screen (21). The convex plate is installed at the angle between the inclined plate (19) and the support plate (20).

6. A pulverizer with an easily replaceable screen as described in claim 5, characterized in that: One of the two support plates (20) has multiple hinge blocks (22) installed at its bottom. The inner walls of the multiple hinge blocks (22) are respectively hinged with semi-circular hoops (23). The other end of the hoops (23) abuts against the bottom surface of the other support plate (20). The outer surface of the hoops (23) contacts the bottom surface of the screen (21). The end of the hoops (23) away from the hinge block (22) is threadedly connected to the support plate (20) by a fastening bolt (24).

7. A pulverizer with an easily replaceable screen as described in claim 6, characterized in that: The multiple hoops (23) are connected by crossbars.

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