A screening device for a ball mill

Abstract

This utility model relates to the field of ball mill screening, and more particularly to a screening device for ball mills. Most current ball mill screening devices involve adding a drum screen to the tail end of the ball mill to separate impurities in the mortar. However, the centrifugal force generated during drum screen operation causes impurities in the mortar to adhere tightly to the screen surface, reducing the effective flow area of ​​the mortar. Furthermore, the drum screen easily causes a reverse reaction of calcium compounds in the mortar, forming calcium carbonate scale, requiring frequent shutdowns for cleaning. This new screening device for ball mills includes a base; two support frames are fixedly connected to the base, and a ball mill is rotatably connected to the two support frames. A housing is fixedly connected to the base. The vibration of the screen frame dislodges impurities from the screen holes, and a scraper further removes the impurities, resulting in better impurity cleaning, preventing screen clogging, increasing the mortar flow area, and improving the screening efficiency.

Description

Technical Field

[0001] This utility model relates to the field of ball mill screening, and more particularly to a screening device for ball mills. Background Technology

[0002] In the soda ash production process, a large amount of recycled sand is generated, which needs to be ground by adding a ball mill. The ground slurry is then discharged. However, the grinding efficiency of the ball mill cannot reach 100%, so it is necessary to separate the impurities in the slurry.

[0003] Most current ball mill screening devices involve adding a drum screen at the tail end of the ball mill to separate impurities in the slurry. The centrifugal force generated during the operation of the drum screen causes impurities in the slurry to adhere tightly to the surface of the screen frame, resulting in a reduction in the effective flow area of ​​the slurry. Furthermore, the drum screen easily causes the calcium compounds in the slurry to undergo a reverse reaction to form calcium carbonate scale, leading to frequent shutdowns for cleaning. Utility Model Content

[0004] To address the shortcomings or defects of the existing technology, this utility model provides a screening device for a ball mill. The device uses the vibration of the screen frame to remove impurities from the screen holes and a scraper to remove the impurities, which can better clean the impurities, avoid screen blockage, increase the flow area of ​​mortar, and improve the screening efficiency of mortar.

[0005] The technical solution is as follows: A screening device for a ball mill includes a base, two support frames fixedly connected to the base, a ball mill rotatably connected to the two support frames, a housing fixedly connected to the base, a slurry outlet at the bottom of the housing, a slag outlet on the side of the housing, a drive motor fixedly connected to the housing, a screen frame slidably connected to the housing, four buffer springs connecting the screen frame to the housing, the screen frame being inclined, two limiting grooves on the inner wall of the housing, inclined panels fixedly connected to each of the two limiting grooves on the housing, a vibration assembly on the housing, and a slag scraping assembly on the housing.

[0006] As a further preferred embodiment, the vibration assembly includes a rotating shaft, which is rotatably connected to the housing. A driving pulley is rotatably connected to the housing, and driven pulleys are fixedly connected to both ends of the rotating shaft. A belt is fitted between one of the driven pulleys and the driving pulley. Fixed posts are fixedly connected to both driven pulleys. A long rod and a short rod are slidably connected to the housing. The short rod and the long rod are respectively fixedly connected to the screen frame. A groove frame is fixedly connected to the bottom of both the short rod and the long rod. Movable grooves are opened on both groove frames, and the two fixed posts are respectively located in the movable grooves on the two groove frames.

[0007] As a further preferred embodiment, the slag scraping assembly includes a bidirectional lead screw, which is rotatably connected to the housing. One end of the bidirectional lead screw is fixedly connected to the output shaft of the drive motor, and the other end is fixedly connected to the drive pulley. A slide table is slidably connected to the housing, and the slide table is threadedly connected to the bidirectional lead screw. A sleeve rod is fixedly connected to the slide table, and a slide rod is slidably connected to the sleeve rod. A tension spring connects the sleeve rod and the slide rod. A connecting rod is fixedly connected to the slide rod, and limit posts are slidably connected to both ends of the connecting rod. Compression springs are connected between each end of the connecting rod and the two limit posts. The two limit posts are located in two limit grooves on the housing and contact the two inclined panels. A scraper is slidably connected to the connecting rod, and the scraper contacts the screen frame. Two return springs connect the scraper to the connecting rod.

[0008] This utility model has the following advantages: the drive motor drives the screen frame to vibrate, and the vibration of the screen frame will cause impurities in the screen holes to fall out of the screen holes. At the same time, the scraper scrapes off the impurities on the screen frame. In this way, the screen frame vibration causes impurities to fall out of the screen holes, and the scraper scrapes off the impurities, which can better clean the impurities, avoid screen blockage, make the mortar flow area larger, and improve the mortar screening efficiency. Attached Figure Description

[0009] Figure 1 A three-dimensional structural diagram of this utility model.

[0010] Figure 2 This utility model Figure 1 A magnified three-dimensional structural diagram of A in the middle.

[0011] Figure 3 A partial three-dimensional structural diagram of the vibration component of this utility model.

[0012] Figure 4 This utility model presents a partial three-dimensional structural diagram of the slag scraping component.

[0013] Figure 5 This utility model presents a partial cross-sectional three-dimensional structural diagram of the slag scraping component.

[0014] Figure 6 This utility model presents a partially disassembled three-dimensional structural diagram of the slag scraping component.

[0015] Figure 7 A three-dimensional structural diagram of the inclined panel of this utility model.

[0016] Figure 8 A three-dimensional structural diagram of the screen frame of this utility model.

[0017] The labels in the attached diagram are as follows: 1-base, 2-support frame, 3-ball mill, 4-box, 5-drive motor, 6-screen frame, 7-buffer spring, 8-sloping panel, 91-rotating shaft, 92-driving pulley, 93-driven pulley, 94-belt, 95-fixed column, 96-short rod, 97-long rod, 98-groove frame, 101-double-acting screw, 102-slide table, 103-sleeve rod, 104-slide rod, 105-tension spring, 106-connecting rod, 107-limiting column, 108-compression spring, 109-scraper, 110-reset spring. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Example 1

[0020] A screening device for a ball mill, such as Figures 1-8 As shown, the device includes a base 1, on which two support frames 2 are welded. A ball mill 3 is rotatably connected to the two support frames 2. A housing 4 is bolted to the base 1. The bottom of the housing 4 has a slurry outlet, and the side of the housing 4 has a slag outlet. A drive motor 5 is bolted to the housing 4. A screen frame 6 is slidably connected to the housing 4. Four buffer springs 7 are connected to the screen frame 6 and the housing 4 via hooks. The screen frame 6 is inclined. The inner wall of the housing 4 has two limiting grooves. An inclined panel 8 is welded into each of the two limiting grooves on the housing 4. The housing 4 is equipped with a vibration assembly and a slag scraping assembly.

[0021] The vibration assembly includes a rotating shaft 91, which is rotatably connected to the housing 4. A driving pulley 92 is rotatably connected to the housing 4. Both ends of the rotating shaft 91 are connected to driven pulleys 93 via flat keys. A belt 94 is fitted between one of the driven pulleys 93 and the driving pulley 92. Fixed posts 95 are welded to both driven pulleys 93. A long rod 97 and a short rod 96 are slidably connected to the housing 4. The short rod 96 and the long rod 97 are respectively fixedly connected to the screen frame 6. A groove frame 98 is welded to the bottom of both the short rod 96 and the long rod 97. Movable grooves are opened on both groove frames 98. The two fixed posts 95 are respectively located in the movable grooves on the two groove frames 98.

[0022] The slag scraping assembly includes a bidirectional lead screw 101, which is rotatably connected to the housing 4. One end of the bidirectional lead screw 101 is fixedly connected to the output shaft of the drive motor 5, and the other end is fixedly connected to the drive pulley 92. A slide table 102 is slidably connected to the housing 4, and the slide table 102 is threadedly connected to the bidirectional lead screw 101. A sleeve rod 103 is fixedly connected to the slide table 102, and a slide rod 104 is slidably connected to the sleeve rod 103. A tension spring 1 is connected between the sleeve rod 103 and the slide rod 104 via a hook. 05. A connecting rod 106 is welded to the slide rod 104. Both ends of the connecting rod 106 are slidably connected to limit posts 107. Both ends of the connecting rod 106 are connected to the two limit posts 107 by hooks and compression springs 108. The two limit posts 107 are located in two limit grooves on the housing 4. The two limit posts 107 are in contact with the two inclined panels 8. A scraper 109 is slidably connected to the connecting rod 106. The scraper 109 is in contact with the screen frame 6. Two return springs 110 are connected to the scraper 109 and the connecting rod 106 by hooks.

[0023] Initially, the two inclined plates 8 press against the two limiting posts 107 respectively, and the compression spring 108 is in a compressed state. The two limiting grooves on the housing 4 press against the two limiting posts 107 respectively, and the tension spring 105 is in a compressed state. The ground mortar flows from the outlet of the ball mill 3 into the screen frame 6, which screens the mortar. After screening, the mortar is discharged from the outlet at the bottom of the housing 4. Then, the drive motor 5 starts, and the output shaft of the drive motor 5 drives the bidirectional lead screw 101 to rotate. The rotation of the bidirectional lead screw 101 drives the active pulley 92 to rotate. The rotation of the active pulley 92 drives the belt 94, the rotating shaft 91, and the two driven pulleys 93 to rotate. The rotation of the two driven pulleys 93 drives the two fixed posts 94 to rotate. When both fixed posts 95 rotate, they drive the two slot frames 98 to move up and down reciprocally. The reciprocating movement of the two slot frames 98 drives the short rod 96 and the long rod 97 to move up and down reciprocally, which in turn drives the screen frame 6 to move up and down reciprocally. This causes the screen frame to vibrate, and the four buffer springs 7 are continuously compressed and rebounded. The vibration of the screen frame causes impurities inside the screen frame to detach. Simultaneously, the rotation of the bidirectional lead screw 101 drives the slide table 102 to move. The movement of the slide table 102 drives the sleeve rod 103, slide rod 104, connecting rod 106, scraper 109, and two limiting posts 107 to move. The tension spring 105 rebounds, the slide rod 104 moves downward, and the slide table 102 continues to move. The movement causes the slide bar 104, connecting rod 106, scraper 109, and two limiting posts 107 to move upward under the action of the upper limit groove in the housing 4. The tension spring 105 will be compressed again, the scraper 109 will disengage from the screen frame, the compression spring 108 will rebound, and the two limiting posts 107 will move away from each other. Then the slide table 102 will move in the opposite direction. The reverse movement of the slide table 102 will cause the sleeve rod 103, slide bar 104, connecting rod 106, scraper 109, and two limiting posts 107 to move in the opposite direction. The two limiting posts 107 will move upward under the action of the upper limit groove in the housing 4. The upward movement of the two limiting posts will cause the scraper, connecting rod, and slide bar to move upward, and the tension spring 105 will be compressed again. As the slide table 102 continues to move, the sleeve rod 103, slide rod 104, connecting rod 106, scraper 109, and two limiting posts 107 will all move downwards and reset under the action of the upper limit groove of the box body 4. The two inclined plates 8 will squeeze the two limiting posts 107 respectively and move them closer to each other. The compression spring 108 will be compressed again, and the scraper 109 will contact the screen frame 6. This process repeats, and the scraper 109 will scrape off the impurities on the screen frame. The impurities will be discharged from the slag outlet on the side of the box body 4. In this way, the screen frame vibration causes the impurities to leave the screen holes, and the scraper 109 scrapes off the impurities, which can better clean the impurities, avoid screen blockage, make the mortar flow area larger, and improve the mortar screening efficiency.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screening device for a ball mill, characterized in that It includes a base (1), on which two support frames (2) are fixedly connected. A ball mill (3) is rotatably connected to the two support frames (2). A box body (4) is fixedly connected to the base (1). A drive motor (5) is fixedly connected to the box body (4). A screen frame (6) is slidably connected to the box body (4). Four buffer springs (7) are connected between the screen frame (6) and the box body (4). Two limiting grooves are opened on the inner wall of the box body (4). An inclined plate (8) is fixedly connected to each of the two limiting grooves on the box body (4). A vibration component is provided on the box body (4). A slag scraping component is provided on the box body (4).

2. A screening device for a ball mill as described in claim 1, characterized in that, The bottom of the box (4) has a slurry outlet, and the side of the box (4) has a slag outlet.

3. A screening device for a ball mill as claimed in claim 1, characterized in that The screen frame (6) is set at an angle.

4. A screening device for a ball mill as claimed in claim 1, characterized in that The vibration assembly includes a rotating shaft (91), which is rotatably connected to the housing (4). A driving pulley (92) is rotatably connected to the housing (4). Driven pulleys (93) are fixedly connected to both ends of the rotating shaft (91). A belt (94) is fitted between one of the driven pulleys (93) and the driving pulley (92). Fixed columns (95) are fixedly connected to both driven pulleys (93). A long rod (97) is slidably connected to the housing (4). A short rod (96) is slidably connected to the housing (4). The short rod (96) and the long rod (97) are fixedly connected to both ends of the screen frame (6). A groove frame (98) is fixedly connected to the bottom of the short rod (96) and the long rod (97).

5. A screening device for a ball mill as claimed in claim 4, characterised in that, Both of the slots (98) have movable slots, and the two fixed columns (95) are located in the movable slots on the two slots (98).

6. A screening device for a ball mill as claimed in claim 4, characterized in that The slag scraping assembly includes a bidirectional lead screw (101), which is rotatably connected to the housing (4). One end of the bidirectional lead screw (101) is fixedly connected to the output shaft of the drive motor (5), and the other end of the bidirectional lead screw (101) is fixedly connected to the active pulley (92). A slide table (102) is slidably connected to the housing (4), and the slide table (102) is threadedly connected to the bidirectional lead screw (101). A sleeve rod (103) is fixedly connected to the slide table (102), and a slide rod (104) is slidably connected to the sleeve rod (103). A tension spring (104) is connected between the sleeve rod (103) and the slide rod (104). 05), a connecting rod (106) is fixedly connected to the slide rod (104). Both ends of the connecting rod (106) are slidably connected to limit posts (107). Both ends of the connecting rod (106) are connected to the two limit posts (107) with compression springs (108). The two limit posts (107) are located in the two limit grooves on the box body (4). The two limit posts (107) are in contact with the two inclined panels (8). A scraper (109) is slidably connected to the connecting rod (106). The scraper (109) is in contact with the screen frame (6). Two return springs (110) are connected between the scraper (109) and the connecting rod (106).

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