Material screening device

Abstract

The utility model discloses a material screening device which comprises a screening box, a plurality of layers of screening nets with different hole diameters are arranged on the inner wall of the screening box, the hole diameters of all the layers of screening nets are sequentially reduced from top to bottom, a vibrator and at least three elastic mechanisms enabling the screening box to be in a suspended state are arranged at the position of the screening box, each elastic mechanism comprises a pull rod, a spring, a spring seat and a hook, the spring seat is arranged at the end part of the pull rod, a through hole for the hook to pass through is formed in the spring seat, a flange is arranged at the end part of the hook, the spring is sleeved at the hook, and two ends of the spring are respectively propped against the spring seat and the flange. The material screening device has the beneficial effects of being convenient to use and preventing the to-be-separated materials from being scattered when making contact with the upper-layer screen.

Description

Technical Field

[0001] This utility model relates to the field of screening equipment technology, specifically to a material screening device. Background Technology

[0002] In industries such as metallurgy, building stone, scrap metal recycling, and glass recycling, it is usually necessary to sort the crushed materials so that the particle size of the materials meets certain requirements.

[0003] However, existing screening devices typically employ a frame-mounted screen box structure, making it difficult to adjust the screen box height. When the distance between the material outlet and the screen mesh is too large, the material contacts the upper screen mesh at a high speed, easily causing spillage. Furthermore, because existing screening devices are supported by the ground, they occupy considerable operating space, making them inconvenient to use. Utility Model Content

[0004] To overcome the above-mentioned shortcomings in the prior art, this utility model provides a material screening device that is easy to use and prevents spillage when the material to be separated comes into contact with the upper screen.

[0005] The technical solution of this utility model is as follows: a material screening device, including a screen box, the inner wall of which is provided with several layers of screens with different apertures, and the aperture of each layer of screens decreases from top to bottom. A vibrator is provided in the screen box, and at least three elastic mechanisms for suspending the screen box. Each elastic mechanism includes a pull rod, a spring, a spring seat, and a hook. The spring seat is provided at the end of the pull rod, and the spring seat is provided with a through hole for the hook to pass through. The end of the hook is provided with a flange, and the spring is sleeved on the hook with both ends abutting against the spring seat and the flange, respectively.

[0006] Preferably, the vibrator is rotatably connected to the screen box, so that the movement trajectory of the eccentric block of the vibrator is adjustable in direction.

[0007] In any of the above embodiments, it is preferred that an mounting plate is provided on the inner wall of the screen box, and each screen is fixedly connected to the mounting plate by fastening bolts.

[0008] In any of the above embodiments, it is preferred that each mounting plate is hinged to the screen box via a pin shaft, and the screen box is provided with an arc-shaped adjustment hole, and each mounting plate is fixed to the adjustment hole.

[0009] In any of the above embodiments, it is preferred that a baffle is provided at each layer of the screen or the mounting plate on the side away from the discharge end.

[0010] In any of the above schemes, it is preferred that the discharge directions of adjacent two layers of screens are staggered.

[0011] In any of the above embodiments, it is preferred that each layer of the screen has a plurality of mounting seats at its frame, and each mounting seat has a plurality of straight screen bars evenly distributed thereon, with the ends of the screen bars at each mounting seat suspended above the next mounting seat along the discharge direction.

[0012] In any of the above embodiments, it is preferred that the surface of each of the screen bars is smooth.

[0013] In any of the above embodiments, it is preferred that a support rod is provided between each of the screen bars and the mounting base.

[0014] In any of the above embodiments, it is preferred that the pull rod has two rod segments, one end of each rod segment has an external thread with opposite directions of rotation, and the two rod segments are connected by an adjusting nut.

[0015] The material screening device of this utility model uses an elastic mechanism to hang the screen box at the bottom of the discharge port, which does not occupy ground space and is therefore convenient to use. By hanging it, the distance between the upper screen and the material outlet is reduced, thus preventing the spillage of the material to be separated when it comes into contact with the upper screen. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment of the material screening device of this utility model.

[0017] Figure 2 This is a schematic diagram of one embodiment of any elastic mechanism of the material screening device of this utility model.

[0018] Figure 3 This is a schematic diagram of an embodiment of the connection between the mounting plate and the screen box of the material screening device of this utility model.

[0019] Figure 4 This is a schematic diagram of another embodiment of the connection between the mounting plate and the screen box of the material screening device of this utility model.

[0020] Figure 5 This is a schematic diagram of a preferred embodiment of the screen of the material screening device of this utility model.

[0021] Figure 6 This is a schematic diagram of an embodiment of the mounting plate of the material screening device of this utility model.

[0022] Figure 7 This is a schematic diagram of a preferred embodiment of the connection between the vibrator and the screen box in the material screening device of this utility model.

[0023] Explanation of the labels in the diagram:

[0024] 101-Pull rod; 102-Adjusting nut; 103-Mounting plate; 104-Screen; 105-Connecting plate; 106-Screen box; 107-Hook; 108-Spring seat; 109-Spring; 110-Pin; 111-Adjusting hole; 112-Support rod; 113-Mounting base; 114-Screen bar; 115-Baffle plate; 116-Internal threaded hole. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] The material screening device provided in this application can be applied to industries such as metallurgy, building stone, scrap metal recycling, and glass recycling. Through this screening device, materials of different particle sizes can be sorted to meet industry standards.

[0028] Example 1:

[0029] like Figure 1 , 2 In the embodiment shown in Figure 3, the screen box 106 is used to install various functional components. Specifically, the screen box 106 can be welded from steel plates. To increase the strength of the screen box 106, several reinforcing ribs can be provided on the outer wall of the screen box 106. Each screen 104 is installed on the inner wall of the screen box 106, and the aperture of each layer of screen 104 decreases from top to bottom. During use, according to the particle size requirements of the target material, the conveying equipment is placed at the discharge port of each layer of screen 104. Excessively fine slag passes through the bottom layer of screen 104 and falls through the notch at the bottom of the screen box 106. The arrangement of multiple layers of screens 104 can prevent the material from accumulating at the upper layer of screens 104 when the feeding speed is too fast. The vibrator can be connected to the screen box 106 via a connecting plate 105. The vibrator can be in the form of an eccentric block driven by a motor.

[0030] To ensure the stability of the screen box 106, at least three elastic mechanisms are provided. Under the action of each elastic mechanism, the screen box 106 is suspended below the outlet of the material to be separated. Specifically, each elastic mechanism includes a pull rod 101, a spring 109, a spring seat 108, and a hook 107. The through hole at the spring seat 108 is used for the hook 107 to pass through. One end of the hook 107 is provided with a flange. The spring 109 is sleeved on the outer wall of the hook 107, and the two ends of the spring 109 abut against the spring seat 108 and the flange, respectively. During operation, the springs 109 of each elastic mechanism provide elastic force to support the screen box 106, making it easy for the screen box 106 to obtain a large angle of vibration. In order to ensure that the suspended screen box 106 has six degrees of freedom of movement and to prevent wear between the pull rod 101 and the spring seat 108 of each elastic mechanism, and between the hook 107 and the spring seat 108, the two ends of the pull rod 101 are connected to the outlet of the material to be separated and the spring seat 108 respectively by hanging, and the hook 107 is fitted with the through hole at the spring seat 108 with clearance.

[0031] In order to make the tilt angle of the screen 104 adjustable, the pull rod 101 is provided with two rod segments, and the ends of each rod segment are provided with external threads with opposite directions of rotation. The two rod segments are connected by adjusting nuts 102.

[0032] In order to make the screen box 106 vibrate more vertically, the vibrator should be set on the opposite side of the discharge direction of each screen 104, so that when the eccentric block of the vibrator rotates, the eccentric block generates a larger torque on the screen box 106.

[0033] When in use, the vibrator causes the screen box 106 to vibrate the screen 104, which separates the material falling into the screen 104.

[0034] Example 2:

[0035] Based on Example 1, such as Figure 7 In the embodiment shown, the vibrator is rotatably connected to the screen box 106. Specifically, the connecting plate 105 is provided with a plurality of internal threaded holes 116, and the vibrator is provided with an adjustment plate with mounting holes. In use, after the tilt angle of the screen 104 is determined, the angle of the adjustment plate is adjusted so that the movement trajectory of the eccentric block of the vibrator can be adjusted, thereby allowing the vibration amplitude of the screen box 106 to be adjusted according to the density of the material to be separated.

[0036] Example 3:

[0037] Based on Example 1 or 2, such as Figure 1 , 3In the illustrated embodiment, an mounting plate 103 is provided on the inner wall of the sieve box 106, wherein each sieve 104 is fixedly connected to the mounting plate 103 by fastening bolts. Specifically, both the mounting plate 103 and the frame of the sieve 104 are provided with mutually mating mounting holes. In use, the mounting holes on the mounting plate 103 and the frame of the sieve 104 are aligned, and the sieve 104 is fixedly connected to the mounting plate 103 by fastening bolts, thereby facilitating the installation and replacement of the sieve 104.

[0038] Example 4:

[0039] Based on Example 3, such as Figure 1 , 3 In the embodiment shown, one end of each mounting plate 103 at the screen box 106 is hinged to the screen box 106 via a pin shaft 110. The screen box 106 is provided with an arc-shaped adjustment hole 111. Therefore, the angle between the screen 104 and the horizontal plane can be adjusted by adjusting the angle between each mounting plate 103 and the horizontal plane. In specific use, the angle between the screen 104 and the horizontal plane can be selected according to the feeding speed of the material to be separated and the regularity of the surface of the material to be separated, so as to prevent the material to be separated from accumulating at the screen 104.

[0040] like Figure 6 In the illustrated embodiment, a baffle 115 is provided at each layer of screen 104 or mounting plate 103, on the side away from the discharge end. The baffle 115 can prevent material from being spilled in the opposite direction of the discharge direction when the angle between the screen 104 and the horizontal plane is small.

[0041] Example 5:

[0042] Based on any of the embodiments 1-4, such as Figure 4 In the illustrated embodiment, the discharge directions of adjacent screen layers 104 are staggered. This facilitates the collection of materials of different particle sizes screened from opposite directions, leaving sufficient space for material collection. Simultaneously, when material falls from below the middle of one screen layer 104 into the next, the residence time of the material on the next screen layer 104 is increased, thereby improving the screening effect.

[0043] Example 6:

[0044] Based on any of the embodiments 1-5, such as Figure 5In the illustrated embodiment, to ensure the screening speed of each layer of screen 104 and prevent the mesh-like openings from trapping materials, the openings of each layer of screen 104 are arranged in a slit-like manner. Specifically, each layer of screen 104 has several mounting seats 113 at its frame, and several screen bars 114 are evenly arranged at each mounting seat 113. One end of each screen bar 114 can be welded to the corresponding mounting seat 113. Multiple mounting seats 113 can reduce the length of the screen bars 114. When falling materials impact the tail end of the screen bars 114, the torque exerted by the materials on the screen bars 114 can be reduced, preventing deformation of the screen bars 114. Along the discharge direction, the end of the screen bar 114 at any mounting seat 113 is suspended above the next mounting seat 113, thereby ensuring that the falling materials smoothly slide to the screen bar 114 at the next mounting seat 113.

[0045] When in use, the material to be separated falls into the screen bar 114. Material with a hole diameter smaller than the gap of the screen bar 114 falls from the gap to the next screen 104, while material with a hole diameter larger than the gap of the screen bar 114 slides down the screen bar 114 in the downward discharge direction.

[0046] In order to reduce the friction when the material slides at the screen bar 114, the screen bar 114 at each screen 104 is smoothly set.

[0047] like Figure 5 In the embodiment shown, a support rod 112 is provided between each screen bar 114 and the mounting base 113. When the material falls and comes into contact with the screen bar 114, the support rod 112 can prevent the torque caused by the material contacting the screen bar 114 from causing it to deform.

[0048] The above-described embodiments are merely preferred embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be covered within the protection scope of this utility model.

Claims

1. A material screening device, comprising a screen box (106), characterized in that, The inner wall of the sieve box (106) is provided with several layers of sieves (104) with different apertures, and the aperture of each layer of sieves (104) decreases from top to bottom. The sieve box (106) is provided with a vibrator and at least three elastic mechanisms to suspend the sieve box (106). Each elastic mechanism includes a pull rod (101), a spring (109), a spring seat (108), and a hook (107). The spring seat (108) is located at the end of the pull rod (101). The spring seat (108) is provided with a through hole for the hook (107) to pass through. The end of the hook (107) is provided with a flange. The spring (109) is sleeved on the hook (107) and its two ends abut against the spring seat (108) and the flange, respectively.

2. The material screening device as described in claim 1, characterized in that, The vibrator is rotatably connected to the sieve box (106), so that the movement trajectory of the eccentric block of the vibrator is adjustable in direction.

3. The material screening device as described in claim 1 or 2, characterized in that, An installation plate (103) is provided on the inner wall of the sieve box (106), and each sieve (104) is fixedly connected to the installation plate (103) by fastening bolts.

4. The material screening device as described in claim 3, characterized in that, Each mounting plate (103) is hinged to the screen box (106) via a pin shaft (110). The screen box (106) is provided with an arc-shaped adjustment hole (111), and each mounting plate (103) is fixed at the adjustment hole (111).

5. The material screening device as described in claim 4, characterized in that, Each layer of screen (104) or mounting plate (103) is provided with a baffle (115) on the side away from the discharge end.

6. The material screening device as described in claim 5, characterized in that, The discharge directions of two adjacent layers of screens (104) are staggered.

7. The material screening device according to any one of claims 1, 2, and 6, characterized in that, Each layer of screen (104) has several mounting seats (113) at its frame. Several straight screen bars (114) are evenly distributed at each mounting seat (113). The ends of the screen bars (114) at each mounting seat (113) along the discharge direction are suspended above the next mounting seat (113).

8. The material screening device as described in claim 7, characterized in that, The surfaces of each sieve bar (114) are set to be smooth.

9. The material screening device as described in claim 7, characterized in that, A support rod (112) is provided between each screen bar (114) and the mounting base (113).

10. The material screening device as described in claim 1, characterized in that, The pull rod (101) has two rod segments, one end of which is provided with external threads in opposite directions, and the two rod segments are connected by an adjusting nut (102).

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