A variable amplitude screening apparatus

Abstract

The utility model relates to a kind of screening equipment of variable amplitude, it is related to the technical field of vibrating screen, it includes front support, rear support, machine body, the machine body is obliquely arranged between front support and rear support, the front support and rear support are symmetrically provided with two, fixed bearing seat is installed on the rear support, eccentric shaft is rotatably arranged between the fixed bearing seat, the end wall of the machine body is installed with screen body bearing seat, the screen body bearing seat is interconnected with eccentric shaft;The side wall of the machine body is provided with abutting block, vertical spring is arranged between the abutting block and front support.This application can produce variable amplitude, so that the amplitude of feeding end is large, which is beneficial to the rapid dispersion of materials, the amplitude of discharge end is small, which is beneficial to improve the screening precision and the overall screening effect.

Description

Technical Field

[0001] This utility model relates to the technical field of vibrating screens, and in particular to a screening device with variable amplitude. Background Technology

[0002] Currently, vibrating screens are used in ore mining to screen ores. Vibrating screens operate by utilizing the reciprocating rotary vibration generated by a vibrator. Typically, vibrating screens use one or more vibration sources to generate amplitude in the screen body to screen materials. However, only one amplitude is generated, making it impossible to produce multiple amplitudes on a single machine. Furthermore, there is a relatively thick material layer at the feed end of the vibrating screen, while the material layer at the discharge end is thinner. Operating with a single amplitude limits the improvement of screening efficiency, thus requiring further improvement. Utility Model Content

[0003] In order to enable the screening equipment to generate variable amplitude, so that the amplitude at the feed end is large, which is conducive to the rapid dispersion of materials, and the amplitude at the discharge end is small, which is conducive to improving screening accuracy and improving the overall screening effect, this application provides a screening equipment with variable amplitude.

[0004] The screening equipment with variable amplitude provided in this application adopts the following technical solution:

[0005] A variable amplitude screening device includes a front support, a rear support, and a machine body. The machine body is inclinedly arranged between the front and rear supports. Two front and two rear supports are symmetrically arranged. A fixed bearing seat is installed on the rear support. An eccentric shaft is rotatably arranged between the fixed bearing seats. A screen body bearing seat is installed on the end wall of the machine body. The screen body bearing seat is connected to the eccentric shaft. An abutment block is provided on the side wall of the machine body. A vertical spring is provided between the abutment block and the front support.

[0006] By adopting the above technical solution, the rear support is located at the higher end of the machine body, i.e., the feed end, and the front support is located at the lower end of the machine body, i.e., the discharge end. During operation, the external motor drives the eccentric shaft to rotate via the synchronous belt, while the front support is fixed. The fixed bearing seat reduces the friction on the eccentric shaft. The eccentric shaft drives the machine body to swing, and the screen body bearing seat reduces the friction between the eccentric shaft and the machine body. Because the eccentric shaft is close to the feed end of the machine body, the eccentric motion amplitude generated at the feed end of the machine body is relatively large, which is conducive to the rapid dispersion of materials after they fall into the machine body. As the materials are continuously transported in the machine body under gravity, the discharge end is far from the eccentric support point. At the same time, the vertical spring and the abutment block abut against the discharge end of the machine body to buffer the machine body. Therefore, the amplitude generated at the lower end of the machine body is small, which is conducive to improving the screening accuracy. Thus, on a single screening machine, the amplitude gradually changes from large to small as the ore is continuously transported. By adopting the method of placing the vibration source at the rear, a screening process with variable amplitude is realized, which improves the screening efficiency while reducing the height of the screen body.

[0007] Preferably, a set of balance blocks are symmetrically fixed on the eccentric shaft.

[0008] By adopting the above technical solution, the centrifugal force generated by the eccentric shaft is balanced, thereby reducing the dynamic load on the foundation.

[0009] Preferably, the eccentric shaft includes a connecting shaft, an adjusting shaft, an adjusting rod, and a locking element. The connecting shaft is rotatably mounted on a fixed bearing seat. The adjusting shaft is positioned between the adjusting rods. The screen body bearing seat is mounted on the adjusting shaft. The length direction of the adjusting shaft is parallel to the length direction of the connecting shaft. The adjusting rod is fixedly mounted at both ends of the adjusting shaft. The adjusting rod passes through the connecting shaft and is slidably connected to it. The locking element is used to fix the adjusting rod to the connecting shaft.

[0010] By adopting the above technical solution, the linear distance between the adjusting rod and the connecting shaft can be changed by driving the adjusting rod to slide between them and using locking parts to fix the adjusting rod and the connecting shaft. This allows for adjustment and control of the machine body's swing amplitude to meet different feeding and screening conditions, while also facilitating disassembly and assembly.

[0011] Preferably, the locking component includes a locking nut and a washer. Two locking nuts are sleeved on the adjusting rod, and the locking nuts are threadedly connected to the outer wall of the adjusting rod. One locking nut abuts against one side of the connecting shaft, and the other locking nut abuts against the other side of the connecting shaft. The washer is disposed between the locking nut and the connecting shaft.

[0012] By adopting the above technical solution, rotating the locking nut will move the locking nut and the connecting shaft away from each other, which will drive the adjusting rod to slide between the adjusting rod and the connecting shaft. Then, rotating the locking nut will cause the washer to press against the connecting shaft. The operation is convenient and quick. The adjusting rod and the connecting shaft can be disengaged from each other, which is convenient for disassembly and maintenance of the equipment and reduces maintenance costs and difficulties.

[0013] Preferably, the front bracket is provided with a diagonal brace, and a diagonal spring is provided between the abutment block and the diagonal brace.

[0014] By adopting the above technical solution, when the eccentric shaft drives the machine body to swing and screen, the machine body swings in a circular motion. The inclined spring deforms between the inclined support block and the abutment block. The inclined spring can buffer and support the machine body from different directions, which is beneficial to the vibration of the machine body, further protects the equipment and improves the screening efficiency.

[0015] Preferably, a slider is slidably mounted on the inclined support block, a rotating block is rotatably mounted on the abutment block, the inclined spring is disposed between the slider and the rotating block, and a sliding assembly is provided on the inclined support block, the sliding assembly being used to drive the slider to slide and fix the slider.

[0016] Preferably, the sliding assembly includes a lead screw and a handle, the inclined support block has a sliding groove, the slider is slidably disposed in the sliding groove, the lead screw is rotatably disposed in the sliding groove, the lead screw and the slider are threadedly connected, and one end of the lead screw passes through the inclined support block and is connected to the handle.

[0017] By adopting the above technical solution, rotating the handle drives the lead screw to rotate, which can control the slider to slide along the length of the groove. When the slider slides, it drives the inclined spring to rotate. The rotation between the rotating block and the abutting block can adjust the tilt angle of the inclined spring between the inclined support block and the abutting block. The direction of the inclined spring can be adjusted according to the actual eccentric shaft amplitude to maximize the support and buffering effect of the inclined spring, which is conducive to extending the service life of the inclined spring.

[0018] Preferably, the inclined spring is fixedly provided with connecting blocks at both ends, and the surfaces of the slider and the rotating block are provided with connecting grooves for the connecting blocks to be inserted, and the connecting blocks and the connecting grooves are mutually compatible.

[0019] By adopting the above technical solution, the connecting block and the connecting groove cooperate with each other, which facilitates the disassembly and assembly of the oblique spring, so as to facilitate the replacement of the oblique spring and extend the service life of the equipment.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. By setting up a front support, a rear support, a machine body, a fixed bearing seat, an eccentric shaft, a screen body bearing seat, abutting blocks, and vertical springs, during operation, an external motor drives the eccentric shaft to rotate via a synchronous belt, while the front support fixes the eccentric shaft to drive the machine body to swing. Since the eccentric shaft is close to the feed end of the machine body, the eccentric motion amplitude generated at the feed end of the machine body is relatively large, which is conducive to the rapid dispersion of materials after they fall into the machine body. As the materials are continuously transported in the machine body under gravity, the discharge end is far from the eccentric support point, and the vertical spring and abutting block abut against the discharge end of the machine body to buffer the machine body. Therefore, the amplitude generated at the lower end of the machine body is small, which is conducive to improving the screening accuracy. By adopting the method of rear-positioning the vibration source, a screening process with variable amplitude is realized, which improves the screening efficiency while reducing the height of the screen body.

[0022] 2. By setting up a connecting shaft, adjusting shaft, adjusting rod, locking nut, and washer, rotating the locking nut moves it away from the connecting shaft, which drives the adjusting rod to slide between the connecting shaft. Rotating the locking nut again causes the washer to press against the connecting shaft, thus changing the linear distance between the adjusting shaft and the connecting shaft. This allows for adjustment and control of the machine's swing amplitude to meet different feeding and screening conditions, while also facilitating disassembly and assembly.

[0023] 3. By setting up inclined support blocks and inclined springs, when the eccentric shaft drives the machine body to swing and screen, the machine body swings in a circular motion. The inclined springs deform between the inclined support blocks and the abutment blocks. The inclined springs can buffer and support the machine body from different directions, which is beneficial to the vibration of the machine body, further protects the equipment and improves the screening efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a screening device with variable amplitude provided in an embodiment of this application.

[0025] Figure 2 yes Figure 1 Enlarged view of section A in the middle.

[0026] Figure 3 yes Figure 1 Enlarged view of section B.

[0027] Explanation of reference numerals in the attached drawings: 1. Machine body; 11. Front support; 12. Rear support; 21. Fixed bearing seat; 22. Screen body bearing seat; 3. Eccentric shaft; 31. Connecting shaft; 32. Adjusting shaft; 33. Adjusting rod; 341. Locking nut; 342. Shim; 4. Abutment block; 41. Vertical spring; 42. Rotating block; 5. Balance block; 6. Diagonal support block; 61. Diagonal spring; 62. Sliding block; 71. Lead screw; 711. Slide groove; 72. Handle; 8. Connecting block; 81. Connecting groove. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0029] This application discloses a screening device with variable amplitude. (Refer to...) Figure 1 and Figure 2 It includes a front support 11, a rear support 12, and a machine body 1. The machine body 1 is inclined between the front support 11 and the rear support 12. The rear support 12 is located at the higher end of the machine body 1, which is the feeding end, and the front support 11 is located at the lower end of the machine body 1, which is the discharging end. There are two symmetrically arranged front supports 11 and two rear supports 12. In actual application, the front supports 11 and the rear supports 12 are fixed to the ground or a wall. A fixed bearing seat 21 is fixedly installed on the rear support 12, and an eccentric shaft 3 is rotatably arranged between the fixed bearing seats 21. The length direction of the eccentric shaft 3 is along the width direction of the machine body 1.

[0030] Reference Figures 1 to 3The end wall of the machine body 1 is equipped with a screen body bearing seat 22. The screen body bearing seat 22 is located at the higher end of the machine body 1. There are two screen body bearing seats 22 symmetrically arranged. The screen body bearing seat 22 is rotatably connected to the eccentric shaft 3. The side wall of the machine body 1 is fixedly provided with an abutment block 4. A vertical spring 41 is provided between the abutment block 4 and the front support 11. Several vertical springs 41 are provided. During operation, the external motor drives the eccentric shaft 3 to rotate via the pulley. The fixed bearing seat 21 reduces the friction force on the eccentric shaft 3. The eccentric shaft 3 drives the machine body 1 to swing. The screen body bearing seat 22 reduces the friction force between the eccentric shaft 3 and the machine body 1. Since the eccentric shaft 3 is close to the feed end of the machine body 1, the eccentric motion amplitude generated at the feed end of the machine body 1 is relatively large, which is conducive to the rapid dispersion of materials after they fall into the machine body 1. As the materials are continuously transported in the machine body 1 under gravity, the discharge end is far from the eccentric fulcrum. At the same time, the vertical spring 41 and the abutment block 4 abut against the discharge end of the machine body 1 to buffer the machine body 1. Therefore, the amplitude generated at the lower end of the machine body 1 is small, which is conducive to improving the screening accuracy.

[0031] Reference Figure 1 and Figure 2 The eccentric shaft 3 includes a connecting shaft 31, an adjusting shaft 32, an adjusting rod 33, and a locking element. The connecting shaft 31 is rotatably mounted on a fixed bearing seat 21. The adjusting shaft 32 is positioned between the adjusting rods 33. The screen body bearing seat 22 is mounted on the adjusting shaft 32. The length direction of the adjusting shaft 32 is parallel to the length direction of the connecting shaft 31. The adjusting rod 33 is integrally mounted at both ends of the adjusting shaft 32. The length direction of the adjusting rod 33 is perpendicular to the length direction of the adjusting shaft 32. The adjusting rod 33 passes through the connecting shaft 31 and is slidably connected to it. The locking element includes a locking nut 341 and a washer 342. Two locking nuts 341 are sleeved on the adjusting rods 33. The inner wall of the locking nut 341 is threadedly connected to the outer wall of the adjusting rod 33. One locking nut 341 abuts against one side of the connecting shaft 31, and the other locking nut 341 abuts against the other side of the connecting shaft 31. The washer 342 is positioned between the locking nut 341 and the connecting shaft 31. Rotating the locking nut 341 moves the locking nut 341 away from the connecting shaft 31, which drives the adjusting rod 33 to slide between the adjusting rod 33 and the connecting shaft 31. Rotating the locking nut 341 again causes the shim 342 to press against the connecting shaft 31, which can change the linear distance between the adjusting shaft 32 and the connecting shaft 31, thereby adjusting and controlling the swing amplitude of the machine body 1 to meet different feeding and screening conditions. At the same time, it facilitates the disassembly and maintenance of the equipment, reducing maintenance costs and difficulties.

[0032] Reference Figure 2 A balance block 5 is fixedly installed on the connecting shaft 31 to balance the centrifugal force generated by the eccentric shaft 3, thereby reducing the dynamic load on the foundation.

[0033] Reference Figure 1 and Figure 3The front support 11 is integrally equipped with a diagonal brace 6, and two diagonal braces 6 are symmetrically arranged. A diagonal spring 61 is installed between the abutment block 4 and the diagonal brace 6. When the eccentric shaft 3 drives the machine body 1 to swing and screen, the machine body 1 swings in a circular motion. The diagonal spring 61 deforms between the diagonal brace 6 and the abutment block 4. The diagonal spring 61 can buffer and support the machine body 1 from different directions, which is beneficial to the vibration of the machine body 1, further protects the equipment and improves the screening efficiency.

[0034] Reference Figure 3 A slider 62 is slidably mounted on the diagonal support block 6, and a rotating block 42 is rotatably mounted on the abutment block 4 via a pin. A diagonal spring 61 is disposed between the slider 62 and the rotating block 42. A sliding assembly is provided on the diagonal support block 6, which includes a lead screw 71 and a handle 72. A slide groove 711 is provided on the diagonal support block 6, and the slider 62 is slidably mounted in the slide groove 711. The slider 62 and the slide groove 711 are mutually adapted to each other. The lead screw 71 is rotatably mounted in the slide groove 711, and the lead screw 71 is threadedly connected to the slider 62. One end of the lead screw 71 passes through the diagonal support block 6 and is connected to the handle 72. Rotating the handle 72 drives the lead screw 71 to rotate, which controls the slider 62 to slide along the length of the groove 711 within the groove 711. When the slider 62 slides, it drives the inclined spring 61 to rotate. The rotation between the rotating block 42 and the abutting block 4 can adjust the tilt angle of the inclined spring 61 between the inclined support block 6 and the abutting block 4. The direction of the inclined spring 61 can be adjusted according to the actual amplitude of the eccentric shaft 3 to maximize the support and buffering effect of the inclined spring 61, which is beneficial to extending the service life of the inclined spring 61.

[0035] Reference Figure 3 The inclined spring 61 is fixedly provided with connecting blocks 8 at both ends. The surfaces of the slider 62 and the rotating block 42 are provided with connecting grooves 81 for the connecting blocks 8 to be inserted. The connecting blocks 8 and the connecting grooves 81 are mutually compatible and cooperate with each other, which facilitates the disassembly and replacement of the inclined spring 61 and extends the service life of the equipment.

[0036] The implementation principle of a variable amplitude screening device according to an embodiment of this application is as follows: During operation, an external motor drives the eccentric shaft 3 to rotate via a synchronous belt, while the front support 11 is fixed. The fixed bearing seat 21 reduces the friction force on the eccentric shaft 3. The eccentric shaft 3 drives the machine body 1 to swing, and the screen body bearing seat 22 reduces the friction force between the eccentric shaft 3 and the machine body 1. Since the eccentric shaft 3 is close to the feed end of the machine body 1, the eccentric motion amplitude generated at the feed end of the machine body 1 is relatively large, which is conducive to the rapid dispersion of materials after they fall into the machine body 1. As the materials are continuously transported in the machine body 1 under gravity, the discharge end is far from the eccentric fulcrum. At the same time, the vertical spring 41 and the abutment block 4 abut against the discharge end of the machine body 1 to buffer the machine body 1. Therefore, the amplitude generated at the lower end of the machine body 1 is small, which is conducive to improving the screening accuracy. Thus, the amplitude gradually changes from large to small as the ore is continuously transported on a single screening device. By adopting the method of placing the vibration source at the rear, a variable amplitude screening process is realized, which improves the screening efficiency while reducing the height of the screen body.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A screening device with variable amplitude, characterized in that: The machine includes a front support (11), a rear support (12), and a body (1). The body (1) is inclined between the front support (11) and the rear support (12). There are two symmetrically arranged front supports (11) and rear supports (12). A fixed bearing seat (21) is installed on the rear support (12). An eccentric shaft (3) is rotatably arranged between the fixed bearing seats (21). A screen body bearing seat (22) is installed on the end wall of the body (1). The screen body bearing seat (22) is connected to the eccentric shaft (3). An abutment block (4) is provided on the side wall of the body (1). A vertical spring (41) is provided between the abutment block (4) and the front support (11).

2. The screening equipment with variable amplitude according to claim 1, characterized in that: A set of balance blocks (5) are symmetrically fixed on the eccentric shaft (3).

3. The screening equipment with variable amplitude according to claim 1, characterized in that: The eccentric shaft (3) includes a connecting shaft (31), an adjusting shaft (32), an adjusting rod (33), and a locking member. The connecting shaft (31) is rotatably mounted on a fixed bearing seat (21). The adjusting shaft (32) is positioned between the adjusting rods (33). The screen body bearing seat (22) is mounted on the adjusting shaft (32). The length direction of the adjusting shaft (32) is parallel to the length direction of the connecting shaft (31). The adjusting rod (33) is fixedly mounted at both ends of the adjusting shaft (32). The adjusting rod (33) passes through the connecting shaft (31) and is slidably connected to the connecting shaft (31). The locking member is used to fix the adjusting rod (33) to the connecting shaft (31).

4. The screening equipment with variable amplitude according to claim 3, characterized in that: The locking component includes a locking nut (341) and a washer (342). Two locking nuts (341) are sleeved on the adjusting rod (33). The locking nuts (341) are threadedly connected to the outer wall of the adjusting rod (33). One locking nut (341) abuts against one side of the connecting shaft (31), and the other locking nut (341) abuts against the other side of the connecting shaft (31). The washer (342) is disposed between the locking nut (341) and the connecting shaft (31).

5. The screening equipment with variable amplitude according to claim 1, characterized in that: The front bracket (11) is provided with a diagonal brace (6), and a diagonal spring (61) is provided between the abutment block (4) and the diagonal brace (6).

6. The screening device with variable amplitude according to claim 5, characterized in that: A slider (62) is slidably mounted on the inclined support block (6), a rotating block (42) is rotatably mounted on the abutment block (4), an inclined spring (61) is mounted between the slider (62) and the rotating block (42), and a sliding component is mounted on the inclined support block (6). The sliding component is used to drive the slider (62) to slide and to fix the slider (62).

7. The screening device with variable amplitude according to claim 6, characterized in that: The sliding assembly includes a lead screw (71) and a handle (72). A groove (711) is provided on the inclined support block (6). The slider (62) is slidably disposed in the groove (711). The lead screw (71) is rotatably disposed in the groove (711). The lead screw (71) and the slider (62) are threadedly connected. One end of the lead screw (71) passes through the inclined support block (6) and is connected to the handle (72).

8. The screening device with variable amplitude according to claim 6, characterized in that: The inclined spring (61) has two fixed connecting blocks (8) at its two ends. The surfaces of the slider (62) and the rotating block (42) are provided with connecting grooves (81) for the connecting blocks (8) to be inserted. The connecting blocks (8) and the connecting grooves (81) are mutually compatible.

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