Vibrating screen

Abstract

The utility model relates to the technical field of screening devices, in particular to a vibrating screen. Comprising a rack, a screen box is arranged on the rack, a spring is arranged between the screen box and the rack, the screen box inclines relative to the ground, a vibration exciter driven by a motor is arranged on the screen box, supporting plates are arranged on the two sides of the screen box, each supporting plate is provided with a plurality of hollow-out parts, supporting wheels comprise circular truncated cone wheels, the circular truncated cone wheels are rotationally connected with a center shaft, and the center shaft is provided with a plurality of hollow-out parts. One end of the center shaft is provided with an external thread part, the external thread part is in threaded connection with the side wall of the screen box, the circular truncated cone wheel is located in the hollow part, the axis of the circular truncated cone wheel is perpendicular to the side wall of the screen box, and the top of the end, close to the side wall of the screen box, of the circular truncated cone wheel is higher than the top face of the supporting plate; the top of the end, away from the side wall of the screen box, of the circular truncated cone wheel is lower than the top face of the supporting plate, and a pressing assembly for pressing the screen plate on the supporting plate is further arranged on the side wall of the screen box. According to the utility model, the screen plate can be inserted into the screen box in a labor-saving manner.

Description

Technical Field

[0001] This utility model relates to the field of screening device technology, and in particular to a vibrating screen. Background Technology

[0002] Vibrating screens are widely used screening equipment. They utilize the principle of vibration by a vibrating motor to throw materials onto the screen surface, causing them to move forward in a straight line. Combined with a properly matched screen mesh, this achieves the purpose of screening. Existing mining vibrating screens have an inclined screen box with an open lower end. When changing screen plates, the plates need to be inserted into the screen box from the lower end. Because the screen box is long and the screen plates are heavy, the friction between the screen plates and the support plates on both sides of the screen box is significant, making insertion difficult. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a vibrating screen in response to the above-mentioned technical deficiencies.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a vibrating screen, including a frame, a screen box is provided on the frame and a spring is provided between the two, the screen box is inclined to the ground, a vibrator driven by a motor is provided on the screen box, support plates are provided on both sides of the screen box, each support plate is provided with several hollow parts, the support roller includes a frustum wheel, the frustum wheel is rotatably connected to a central shaft, one end of the central shaft is provided with an external thread, the external thread is threaded to the side wall of the screen box, the frustum wheel is located in the hollow part and its axis is perpendicular to the side wall of the screen box, the top of the end of the frustum wheel near the side wall of the screen box is higher than the top surface of the support plate, the top of the end of the frustum wheel away from the side wall of the screen box is lower than the top surface of the support plate, and a pressing assembly is also provided on the side wall of the screen box to press the screen plate against the support plate.

[0005] Preferably, the clamping assembly includes a tensioning plate with multiple through holes, a top plate on one side of the tensioning plate, and a clamping plate on the other side of the tensioning plate. The side wall of the screen box has multiple elongated holes, with the through holes positioned higher than the elongated holes. Fastening bolts pass through the through holes and elongated holes and connect with nuts. After the nuts are tightened, the side of the top plate away from the tensioning plate contacts the side wall of the screen box, and the side of the clamping plate away from the tensioning plate contacts the screen plate.

[0006] Preferably, a pressure pad is provided on the outer side of the elongated hole.

[0007] Preferably, the screen plate has folded edges on both sides in the width direction, the angle between the folded edges and the screen plate is an acute angle, and the pressing plate is located inside the folded edges.

[0008] Preferably, a liner is provided at the lower end of the sieve box.

[0009] Preferably, a clamp is provided at the end of the external thread portion away from the frustum wheel, and the clamp is located on the outside of the screen box.

[0010] Preferably, a baffle coaxial with the truncated disc wheel is provided at one end near the external thread.

[0011] Compared with the prior art, the present invention has the following advantages: support plates are provided on both sides of the screen box, and several hollow parts are provided on each support plate. The truncated wheel is located in the hollow part and its axis is perpendicular to the side wall of the screen box. Rotating the external thread part can move the truncated wheel, thereby allowing it to lift or lower the screen plate. Due to the presence of the truncated wheel, it is easier to remove the old screen plate and insert the new screen plate. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of a vibrating screen.

[0014] Figure 2 for Figure 1 A magnified view of point I in the middle.

[0015] Figure 3 for Figure 1 Enlarged view of section II.

[0016] Figure 4 for Figure 1 Enlarged view of section III.

[0017] Figure 5 This is a schematic diagram of the support roller structure.

[0018] In the diagram: 1. Frame; 2. Screen box; 21. Long hole; 22. Liner plate; 23. Pressure pad; 3. Motor; 4. Support plate; 41. Hollowed-out part; 5. Fastening bolt; 6. Support roller; 61. Clamping head; 62. External thread part; 63. Round table roller; 631. Baffle plate; 64. Central shaft; 7. Tensioning plate; 71. Top plate; 72. Pressure plate; 8. Screen plate; 81. Folded edge. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] Detailed implementation method: combined with Figure 1-5 As shown, a vibrating screen includes a frame 1, on which a screen box 2 is mounted and a spring is connected. The screen box 2 is inclined to the ground. A vibrator driven by a motor 3 is mounted on the screen box 2, causing the screen box 2 to vibrate. Support plates 4 are mounted on both sides of the screen box 2. Each support plate 4 has several hollow sections 41, preferably two to four hollow sections 41 evenly spaced on each support plate 4. A support roller 6 includes a frustum-shaped truncated cone roller 63, which is rotatably connected to a central shaft 64. One end of 64 is provided with an external thread 62, which is threaded to the side wall of the screen box 2. The frustum wheel 63 is located inside the hollow part 41 and its axis is perpendicular to the side wall of the screen box 2. Tightening the external thread 62 can move the frustum wheel 63 closer to or away from the side wall of the screen box 2. The top of the end of the frustum wheel 63 that is closer to the side wall of the screen box 2 is higher than the top surface of the support plate 4, and the top of the end of the frustum wheel 63 that is away from the side wall of the screen box 2 is lower than the top surface of the support plate 4. The side wall of the screen box 2 is also provided with a clamping assembly that presses the screen plate 8 onto the support plate 4. When the screen plate 8 is inserted into place, tightening the external thread 62 makes the frustum wheel 63 contact the side wall of the screen box 2. At this time, the distance between the outer surfaces of the two corresponding frustum wheels 63 on opposite sides of the screen box 2 and the plane where the top surface of the support plate 4 intersects is greater than the width of the screen plate 8, so that the bottom surface of the screen plate 8 can contact the top surface of the support plate 4.

[0021] In this embodiment, the pressing assembly includes a tensioning plate 7 with multiple through holes. A top plate 71 is provided on one side of the tensioning plate 7, and a pressing plate 72 is provided on the other side of the tensioning plate 7. Multiple elongated holes 21 are provided on the side wall of the screen box 2. The position of the through holes is higher than the position of the elongated holes 21. The fastening bolts 5 pass through the through holes and elongated holes 21 and are connected to the nuts. After the nuts are tightened, the side of the top plate 71 away from the tensioning plate 7 contacts the side wall of the screen box 2, and the side of the pressing plate 72 away from the tensioning plate 7 contacts the screen plate 8, thereby pressing the screen plate 8 onto the support plate 4.

[0022] In this embodiment, a pressure pad 23 is provided on the outer side of the elongated hole 21. The pressure pad 23 is provided with a through hole, through which the fastening bolt 5 passes and is connected to the nut. The side of the pressure pad 23 that contacts the nut is inclined to the side of the screen box 2 and gradually moves away from the side of the screen box 2 from bottom to top.

[0023] In this embodiment, the screen plate 8 has flanges 81 on both sides in the width direction, and the angle between the flanges 81 and the screen plate 8 is an acute angle. The pressing plate 72 is located inside the flanges 81. Due to the presence of the flanges 81, the two sides of the screen plate 8 in the width direction will not slide out from under the pressing plate 72 in the width direction.

[0024] In this embodiment, a liner 22 is provided at the lower end of the screen box 2. The top surface of the liner 22 is higher than the bottom surface of the lower end of the screen plate 8 and preferably not higher than the top surfaces of both sides of the lower end of the screen plate 8. After the screen plate 8 is inserted into place (at this time, the nuts on the fastening bolts 5 have not yet been tightened, and the frustum wheel 63 has not yet retracted to contact the side wall of the screen box 2), the liner 22 can act as a barrier to prevent the screen plate 8 from slipping. The liner 22 is detachably connected to the screen box 2, and can be replaced when the liner 22 is worn.

[0025] In this embodiment, a chuck 61 is provided at the end of the external threaded portion 62 away from the frustum wheel 63. The chuck 61 is preferably hexagonal in shape. The chuck 61 is located on the outside of the sieve box 2, which makes it convenient to use a tool to hold the chuck 61 to rotate the external threaded portion 62.

[0026] In this embodiment, a baffle 631 coaxial with the end of the frustum wheel 63 near the external threaded portion 62 is provided, and the baffle 631 can play a limiting role.

[0027] Working principle: When it is necessary to replace the screen plate 8, first loosen the nut on the fastening bolt 5, then rotate the external thread part 62 to move the round wheel 63 away from the screen box 2, lifting the old screen plate 8 upwards. Then lift the lower end of the old screen plate 8 upwards so that the bottom surface of that end is higher than the top surface of the liner plate 22. Then pull the old screen plate 8 outwards, and then insert the new screen plate 8 into the original position of the old screen plate 8. Then rotate the external thread part 62 to make it contact the side wall of the screen box 2, and then tighten the nut on the fastening bolt 5. Due to the presence of the support roller 6, it is relatively easy to pull out the old screen plate 8 and insert the new screen plate 8.

[0028] This document uses specific embodiments to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A vibrating screen, comprising a frame (1), a screen box (2) mounted on the frame (1) and a spring disposed between the two, the screen box (2) being inclined to the ground, an exciter driven by a motor (3) mounted on the screen box (2), and support plates (4) disposed on both sides of the screen box (2), characterized in that: Each support plate (4) is provided with several hollow parts (41), and the support roller (6) includes a truncated disc (63). The truncated disc (63) is rotatably connected to the central shaft (64). One end of the central shaft (64) is provided with an external thread (62). The external thread (62) is threadedly connected to the side wall of the sieve box (2). The truncated disc (63) is located inside the hollow part (41) and its axis is perpendicular to the side wall of the sieve box (2). The top of the end of the truncated disc (63) close to the side wall of the sieve box (2) is higher than the top surface of the support plate (4). The top of the end of the truncated disc (63) away from the side wall of the sieve box (2) is lower than the top surface of the support plate (4). The side wall of the sieve box (2) is also provided with a pressing assembly that presses the sieve plate (8) onto the support plate (4).

2. A vibrating screen according to claim 1, characterized in that: The clamping assembly includes a tension plate (7), which has multiple through holes. A top plate (71) is provided on one side of the tension plate (7), and a clamping plate (72) is provided on the other side of the tension plate (7). Multiple elongated holes (21) are provided on the side wall of the sieve box (2). The position of the through holes is higher than the position of the elongated holes (21). Fastening bolts (5) pass through the through holes and elongated holes (21) and are connected to nuts. After the nuts are tightened, the side of the top plate (71) away from the tension plate (7) contacts the side wall of the sieve box (2), and the side of the clamping plate (72) away from the tension plate (7) contacts the sieve plate (8).

3. A vibrating screen according to claim 2, characterized in that: A pressure pad (23) is provided on the outside of the elongated hole (21).

4. A vibrating screen according to claim 2, characterized in that: The sieve plate (8) has folded edges (81) on both sides in the width direction. The angle between the folded edges (81) and the sieve plate (8) is an acute angle. The pressing plate (72) is located inside the folded edges (81).

5. A vibrating screen according to any one of claims 1-4, characterized in that: The lower end of the sieve box (2) is provided with a liner (22).

6. A vibrating screen according to any one of claims 1-4, characterized in that: A chuck (61) is provided at the end of the external threaded part (62) away from the truncated disc wheel (63), and the chuck (61) is located on the outside of the sieve box (2).

7. A vibrating screen according to any one of claims 1-4, characterized in that: The frustum wheel (63) has a baffle (631) coaxial with the external thread (62) at one end.

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