A screening device

Abstract

The utility model relates to the technical field of stone screening, and specifically to a screening device. The specific technical scheme is: a screening device, including a screening box with an opening at the top, a first conveyor belt is provided in the screening box through a first upper support shaft and a first lower support shaft sleeve, a second conveyor belt is provided below the first conveyor belt through a second upper support shaft and a second lower support shaft sleeve, a first sieve plate is symmetrically provided on the first conveyor belt, a second sieve plate is symmetrically provided on the second conveyor belt, the first conveyor belt and the second conveyor belt are staggered, and one end of the first conveyor belt is inclined toward the second conveyor belt, and the end of the second conveyor belt located below the first conveyor belt is inclined toward the bottom of the screening box. The utility model can realize automatic multi-stage screening of rubble waste, and is convenient for classifying and collecting rubble waste of various sizes after screening.

Description

Technical Field

[0001] The utility model relates to the technical field of stone screening, in particular to a screening device. Background Art

[0002] Stone, also known as stone material, refers to rock used as material. Rough stone is unformed stone in its natural state after mining. After the rough stone is crushed, a large amount of rough stone waste will be generated. The requirements for the size of rough stone waste are different in different scenarios. Therefore, the rough stone waste needs to be screened before use.

[0003] For example, a Chinese utility model patent (CN218925331U) discloses a stone screener, which records: "Large-sized stones will pass through the limiting plate corresponding to the first discharge hole and the first discharge hole in turn, slide from the first discharge pipe to the outside, and then slide from the first discharge pipe to the outside. Smaller-sized stones will hit one of the limiting plates and then fall onto the second conveyor belt. The stones are transported from the second discharge pipe to the outside through the second conveyor belt." It also points out that "most of the existing sand and gravel screening devices are manual screening, and the screening is slow. The general practice now is to place a sieve at an angle first and perform manual screening. This method is difficult to screen the stones well, and requires a lot of labor, and the stones cannot be graded after selection." Technical deficiencies.

[0004] In summary, it can be seen that the following technical problems exist in the prior art: Currently, when screening rough stone waste in stone, the screen plate is usually placed at an angle and screened manually. The screening process is time-consuming and labor-intensive and it is inconvenient to perform multi-stage screening. For this reason, the present application proposes a new screening device. Summary of the invention

[0005] In view of the shortcomings of the prior art, the utility model provides a screening device which, through the overall structural coordination design, can realize automatic multi-stage screening of rubble waste materials, and facilitate the classification and collection of rubble waste materials of various sizes after screening. Compared with manual screening by manually tilting the screen plate, the screening efficiency is effectively improved and labor costs are saved.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The utility model discloses a screening device, comprising a screening box with an opening at the top, a first conveyor belt being provided in the screening box via a first upper support shaft and a first lower support shaft sleeve, a second conveyor belt being provided below the first conveyor belt via a second upper support shaft and a second lower support shaft sleeve, a first screen plate being symmetrically provided on the first conveyor belt, a second screen plate being symmetrically provided on the second conveyor belt, the first conveyor belt and the second conveyor belt being staggered, and one end of the first conveyor belt being inclined toward the second conveyor belt, and an end of the second conveyor belt being located below the first conveyor belt being inclined toward the bottom of the screening box.

[0008] Preferably, the first conveyor belt is driven by a low-speed motor 2 arranged on the outer wall of the screening box, and the second conveyor belt is driven by a low-speed motor 3 arranged on the outer wall of the screening box.

[0009] Preferably, the inner bottom of the screening box is provided with a first aggregate box, a second aggregate box and a third aggregate box, respectively. The first aggregate box is located below the second lower support shaft, the second aggregate box is located below the first upper support shaft, and the third aggregate box is located below the second upper support shaft.

[0010] Preferably, the top of the screening box is respectively provided with a first top plate and a second top plate, the first top plate and the second top plate are arranged separately, and the first top plate and the second top plate are rotatably connected on the corresponding sides thereof, the first rotating shaft and the second rotating shaft are respectively provided with a first closing plate and a second closing plate, one end of the first rotating shaft and the second rotating shaft are respectively provided with a first spur gear and a second spur gear meshing with the first spur gear, the second rotating shaft is provided with a first bevel gear at one end of the second spur gear, a low-speed motor 1 is provided on the outer wall of the screening box, a second bevel gear is fixed to the output end of the low-speed motor 1, and the second bevel gear meshes with the first bevel gear.

[0011] Preferably, a limiting guide frame is provided on the inner side of the first conveyor belt and the second conveyor belt, and the limiting guide frame is fixed to the screening box, and the inner side of each limiting guide frame is slidably connected to a movable frame up and down, and the screening box is rotatably connected to a first support rod and a second support rod corresponding to the two movable frames one by one, and one end of the first support rod and the second support rod is fixed with a first eccentric shaft and a second eccentric shaft, respectively, and the other ends of the first eccentric shaft and the second eccentric shaft are movably connected to the two movable frames.

[0012] Preferably, a transmission belt is connected between the first support rod and the second support rod, a third spur gear is fixed to one end of the second support rod extending outside the screening box, a driving motor is fixed outside the screening box, a fourth spur gear is fixed to the output end of the driving motor and is meshingly connected to the third spur gear.

[0013] Preferably, a material taking plate is rotatably connected to the lower side wall of the screening box and is located beside the first material collecting box, the second material collecting box and the third material collecting box.

[0014] Preferably, a connecting seat is fixed on the outer wall of the material picking plate near its top end, and a limiting seat is fixed on the outer side of the screening box and at a position corresponding to the connecting seat. A pull rod is slidably connected to the inner side of the limiting seat, and the lower end of the pull rod extends into the connecting seat and is slidably connected to the connecting seat, and a spring is fixed between the pull rod and the limiting seat.

[0015] The utility model has the following beneficial effects:

[0016] The screening device provided by the utility model, through the overall structural coordination design, such as the staggered inclined arrangement of the first conveyor belt and the second conveyor belt and the arrangement of the screen plate on the conveyor belt, can realize automatic multi-stage screening of rubble waste materials, and facilitate the classification and collection of rubble waste materials of various sizes after screening. Compared with manual screening by manually tilting the screen plate, the screening efficiency is effectively improved and labor costs are saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure inside the screening box;

[0019] Figure 3 It is a structural schematic diagram of the upper end of the screening box;

[0020] Figure 4 It is a structural schematic diagram of the lower end of the screening box;

[0021] Figure 5 It is a schematic diagram of the structure of extending the upper end of the outer box;

[0022] Figure 6 It is a schematic diagram of the structure between the first conveyor belt and the second conveyor belt;

[0023] In the figure: 1, screening box; 2, first upper support shaft; 3, first lower support shaft; 4, second upper support shaft; 5, second lower support shaft; 6, first conveyor belt; 7, second conveyor belt; 8, first sieve plate; 9, second sieve plate; 10, first material collection box; 11, second material collection box; 12, third material collection box; 13, first top plate; 14, second top plate; 15, first rotating shaft; 16, second rotating shaft; 17, first flat gear; 18, second flat gear; 19, first bevel gear; 20, extended outer box; 21. Low-speed motor one; 22. Second bevel gear; 23. Low-speed motor two; 24. Low-speed motor three; 25. Limiting guide frame; 26. Movable frame; 27. First eccentric shaft; 28. First support rod; 29. ​​Second eccentric shaft; 30. Second support rod; 31. Third flat gear; 32. Transmission belt; 33. Driving motor; 34. Fourth flat gear; 35. Feeding plate; 36. Connecting seat; 37. Limiting seat; 38. Pull rod; 39. Spring; 40. First closing plate; 41. Second closing plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0026] Example 1

[0027] refer to Figure 1-Figure 6The utility model discloses a screening device, comprising a screening box 1 with an opening at the top, a first conveyor belt 6 is sleeved by a first upper support shaft 2 and a first lower support shaft 3 in the screening box 1, a second conveyor belt 7 is sleeved by a second upper support shaft 4 and a second lower support shaft 5 below the first conveyor belt 6, a first sieve plate 8 is symmetrically arranged on the first conveyor belt 6, a second sieve plate 9 is symmetrically arranged on the second conveyor belt 7, the first conveyor belt 6 and the second conveyor belt 7 are staggered, and one end of the first conveyor belt 6 is inclined toward the second conveyor belt 7, and the end of the second conveyor belt 7 located below the first conveyor belt 6 is inclined toward the bottom of the screening box 1. It should be noted that: through the position design between the first upper support shaft 2, the first lower support shaft 3, the second upper support shaft 4 and the second lower support shaft 5, the first conveyor belt 6 and the second conveyor belt 7 are both arranged at an inclination. When the rubble waste falls onto the first conveyor belt 6 and the second conveyor belt 7, in order to facilitate the screening of the rubble waste, the first sieve plate 8 is symmetrically fixed on the outer side of the first conveyor belt 6, and the second sieve plate 9 is symmetrically fixed on the outer side of the second conveyor belt 7. The first sieve plate 8 and the second sieve plate 9 are used to achieve multi-stage screening of the rubble waste. The outer sides of the first sieve plate 8 and the second sieve plate 9 are both fitted with the inner side of the screening box 1 to prevent the rubble waste from being stuck between the conveyor belt and the screening box 1. The first sieve plate and the second sieve plate are perpendicular to the first conveyor belt and the second conveyor belt, and are arranged along the width direction of the conveyor belt. Preferably, their length is the same as the width of the conveyor belt.

[0028] Furthermore, in order to avoid the electrical equipment being exposed outside the screening box 1, an extended outer box 20 is fixed to the outer side of the screening box 1, one end of the first lower support shaft 3 and the second lower support shaft 5 both pass through the screening box 1 and extend into the extended outer box 20, a low-speed motor 23 is fixed in the extended outer box 20 and located at one end of the first lower support shaft 3, and the output end of the low-speed motor 23 is fixed to the first lower support shaft 3, a low-speed motor 3 is fixed in the extended outer box 20 and located at one end of the second lower support shaft 5, and the output end of the low-speed motor 3 24 is fixed to the second lower support shaft 5, and the first lower support shaft 3 and the second lower support shaft 5 are driven to rotate by the low-speed motor 23 and the low-speed motor 3 24, so as to conveniently drive the first conveyor belt 6 and the second conveyor belt 7 to move, and then conveniently drive the first screen plate 8 and the second screen plate 9 to move, and the movement of the first screen plate 8 and the second screen plate 9 facilitates the upward transportation of waste materials of different sizes and finally drops downward.

[0029] Furthermore, in order to facilitate the classification and collection of waste materials of different sizes during the screening process, the inner bottom of the screening box 1 is respectively provided with a first collecting box 10, a second collecting box 11 and a third collecting box 12, wherein the first collecting box 10 is located below the second lower support shaft 5, the second collecting box 11 is located below the first upper support shaft 2, and the third collecting box 12 is located below the second upper support shaft 4, so that the waste materials pushed by the first screen plate 8 fall into the second collecting box 11 for collection, and the waste materials pushed by the second screen plate 9 fall into the third collecting box 12 for collection, and the waste materials of the smallest size after screening naturally fall into the first collecting box 10 for collection.

[0030] In order to facilitate the closure of the top of the screening box 1, the top of the screening box 1 is provided with a first top plate 13 and a second top plate 14, respectively. The first top plate 13 and the second top plate 14 are provided separately, and the hole formed by the separation is the feed inlet. Of course, the top of the screening box can be provided to be closed, and a through hole is provided on the top as the feed inlet. The first rotating shaft 15 and the second rotating shaft 16 are rotatably connected to the corresponding sides of the first top plate 13 and the second top plate 14, respectively, and the first rotating shaft 15 and the second rotating shaft 16 are provided with a first sealing plate 40 and a second sealing plate 41, respectively.

[0031] When screening begins, in order to facilitate opening of the first sealing plate 40 and the second sealing plate 41 so that a fixed-size feed port is formed between the first sealing plate 40 and the second sealing plate 41, one end of the first rotating shaft 15 and the second rotating shaft 16 are respectively provided with a first spur gear 17 and a second spur gear 18 meshing with the first spur gear 17, the first spur gear 17 and the second spur gear 18 are arranged on the same side and above the extended outer box 20, the second rotating shaft 16 is provided with a first bevel gear 19 at one end of the second spur gear 18, a low-speed motor 21 is provided on the outer wall of the screening box 1, that is, the low-speed motor 21 is provided on the top of the extended outer box 20, and a second bevel gear 22 is fixed to the output end of the low-speed motor 21, and the second bevel gear 22 meshes with the first bevel gear 19.

[0032] Furthermore, in order to facilitate opening the screening box 1 and taking out the first material collection box 10, the second material collection box 11 and the third material collection box 12, a material collection plate 35 is rotatably connected to the lower side wall of the screening box 1 and located beside the first material collection box 10, the second material collection box 11 and the third material collection box 12. In order to facilitate the limiting and fixing of the material collection plate 35, a connecting seat 36 is fixed on the outer side wall of the material collection plate 35 near its top, and a limiting seat 37 is fixed on the outer side of the screening box 1 and at a position corresponding to the connecting seat 36. A pull rod 38 is slidably connected to the inner side of the limiting seat 37, and the lower end of the pull rod 38 extends into the connecting seat 36 and is slidably connected to the connecting seat 36. A spring 39 is also fixed between the pull rod 38 and the limiting seat 37.

[0033] Example 2

[0034] The screening device provided in Example 1 is further optimized, specifically, as Figure 1 , Figure 2 and Figure 6 As shown, in the process where the rubble waste falls through the feed port onto the first conveyor belt 6 and the second conveyor belt 7 and is screened by the first screen plate 8 and the second screen plate 9, in order to improve the screening efficiency, a limiting guide frame 25 is provided on the inner side of the first conveyor belt 6 and the second conveyor belt 7, and the limiting guide frame 25 is fixed to the screening box 1, and the inner side of each limiting guide frame 25 is connected with a movable frame 26 for sliding up and down, and the screening box 1 is rotatably connected with a first support rod 28 and a second support rod 30 corresponding to the two movable frames 26, respectively, and the first support rod 28 and the second support rod 30 are located in the screening box 1. One end thereof is fixed with a first eccentric shaft 27 and a second eccentric shaft 29, respectively, and the other ends of the first eccentric shaft 27 and the second eccentric shaft 29 are movably connected with the two movable frames 26, respectively.

[0035] Furthermore, a transmission belt 32 is connected between the ends of the first support rod 28 and the second support rod 30 extending outside the screening box, and the transmission belt 32 is located in the extended outer box 20. A third flat gear 31 is fixed to the end of the second support rod 30 extending outside the screening box 1, and a driving motor 33 is fixed outside the screening box 1. A fourth flat gear 34 is fixed to the output end of the driving motor 33 and meshes with the third flat gear 31. The driving motor 33, the third flat gear 31 and the fourth flat gear 34 are all located in the extended outer box 20.

[0036] In the present utility model, the disclosed low-speed motor 1 21, low-speed motor 23, low-speed motor 3 24 and drive motor 33 can adopt the existing known models on the market. For those skilled in the art, the forward and reverse operation of the low-speed motor 1 21, low-speed motor 23, low-speed motor 3 24 and drive motor 33 and the power supply to the low-speed motor 1 21, low-speed motor 23, low-speed motor 3 24 and drive motor 33 are all conventional technical means, and their principles are not described in detail here.

[0037] When the utility model is used, when screening begins, the low-speed motor 21 is started to drive the second bevel gear 22 to rotate, and the second rotating shaft 16 is driven to rotate through the meshing of the second bevel gear 22 and the first bevel gear 19, and then the first rotating shaft 15 is driven to rotate synchronously through the meshing of the first flat gear 17 and the second flat gear 18, thereby driving the first closing plate 40 and the second closing plate 41 to perform mirror motion, so that a fixed-size feeding port is formed between the first closing plate 40 and the second closing plate 41, and rough stone waste is conveniently put in for screening through the feeding port;

[0038] At the same time as the input, the driving motor 33 is started to drive the fourth flat gear 34 to rotate, and the second support rod 30 is driven to rotate through the meshing between the fourth flat gear 34 and the third flat gear 31, and then the first support rod 28 is driven to rotate synchronously with the second support rod 30 through the transmission of the transmission belt 32, and then the second eccentric shaft 29 and the first eccentric shaft 27 are driven to rotate at the same time, thereby driving the two movable frames 26 to perform lifting and reciprocating motions under the guidance of the limiting guide frame 25, so that the first conveyor belt 6 and the second conveyor belt 7 are driven to vibrate slightly at the same time, so as to achieve accelerated screening;

[0039] At this time, the larger-sized rubble waste is screened by the first screen plate 8 and accumulated on the upper end of the first screen plate 8, while the normal-sized and smaller-sized rubble waste passes through the first screen plate 8 and falls to the outside of the second conveyor belt 7 and is screened by the second screen plate 9. At this time, the normal-sized rubble waste is accumulated on the upper end of the second screen plate 9, so that the smaller-sized rubble waste finally passes through the second screen plate 9 and falls into the first collecting box 10 for collection. Figure 2 As shown;

[0040] Finally, the low-speed motor 23 and the low-speed motor 3 24 are started to drive the first lower support shaft 3 and the second lower support shaft 5 to rotate, and then drive the first conveyor belt 6 and the second conveyor belt 7 to move, thereby driving the first screen plate 8 and the second screen plate 9 to move, so that the larger and normal-sized rough stone waste are pushed upward and finally fall into the second collection box 11 and the third collection box 12 for classification and collection. After pulling the pull rod 38 to slide it out of the connecting seat 36, it is convenient to open the material collection plate 35, and then it is convenient to take out the first collection box 10, the second collection box 11 and the third collection box 12.

[0041] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A screening device, comprising a screening stand (1) with an opening at the top, characterized in that: A first conveyor belt (6) is sleeved in the screening box (1) via a first upper support shaft (2) and a first lower support shaft (3); a second conveyor belt (7) is sleeved below the first conveyor belt (6) via a second upper support shaft (4) and a second lower support shaft (5); a first sieve plate (8) is symmetrically arranged on the first conveyor belt (6); a second sieve plate (9) is symmetrically arranged on the second conveyor belt (7); the first conveyor belt (6) and the second conveyor belt (7) are staggered, and one end of the first conveyor belt (6) is inclined toward the second conveyor belt (7); and one end of the second conveyor belt (7) located below the first conveyor belt (6) is inclined toward the bottom of the screening box (1).

2. A screening device according to claim 1, characterized in that: The first conveyor belt (6) is driven by a low-speed motor 2 (23) arranged on the outer wall of the screening box (1), and the second conveyor belt (7) is driven by a low-speed motor 3 (24) arranged on the outer wall of the screening box (1).

3. A screening device according to claim 1, characterized in that: The inner bottom of the screening box (1) is respectively provided with a first aggregate box (10), a second aggregate box (11) and a third aggregate box (12); the first aggregate box (10) is located below the second lower support shaft (5); the second aggregate box (11) is located below the first upper support shaft (2); and the third aggregate box (12) is located below the second upper support shaft (4).

4. A screening device according to claim 1, characterized in that: The top of the screening box (1) is provided with a first top plate (13) and a second top plate (14), respectively. The first top plate (13) and the second top plate (14) are arranged apart from each other. The first rotating shaft (15) and the second rotating shaft (16) are rotatably connected to the corresponding sides of the first top plate (13) and the second top plate (14), respectively. The first rotating shaft (15) and the second rotating shaft (16) are provided with a first sealing plate (40) and a second sealing plate (41), respectively. A first spur gear (17) and a second spur gear (18) meshing with the first spur gear (17) are respectively provided at one end of the two rotating shafts (16); a first bevel gear (19) is provided at one end of the second spur gear (18); a low-speed motor (21) is provided on the outer wall of the screening box (1); a second bevel gear (22) is fixed to the output end of the low-speed motor (21); and the second bevel gear (22) meshes with the first bevel gear (19).

5. A screening device according to claim 1, characterized in that: A limiting guide frame (25) is arranged on the inner side of the first conveyor belt (6) and the second conveyor belt (7), and the limiting guide frame (25) is fixed to the screening box (1). The inner side of each limiting guide frame (25) is slidably connected to a movable frame (26) up and down. The screening box (1) is rotatably connected to a first support rod (28) and a second support rod (30) corresponding to the two movable frames (26). A first eccentric shaft (27) and a second eccentric shaft (29) are fixed to one end of the first support rod (28) and the second support rod (30), respectively. The other ends of the first eccentric shaft (27) and the second eccentric shaft (29) are movably connected to the two movable frames (26).

6. A screening device according to claim 5, characterized in that: A transmission belt (32) is connected between the first support rod (28) and the second support rod (30); a third spur gear (31) is fixed to one end of the second support rod (30) extending outside the screening box (1); a driving motor (33) is fixed outside the screening box (1); a fourth spur gear (34) is fixed to the output end of the driving motor (33) and is meshingly connected to the third spur gear (31).

7. A screening device according to claim 3, characterized in that: A material taking plate (35) is rotatably connected to the lower side wall of the screening box (1) and is located beside the first material collecting box (10), the second material collecting box (11) and the third material collecting box (12).

8. A screening device according to claim 7, characterized in that: A connecting seat (36) is fixed on the outer wall of the material-removing plate (35) near its top end, and a limiting seat (37) is fixed on the outer side of the screening box (1) and at a position corresponding to the connecting seat (36). A pull rod (38) is slidably connected to the inner side of the limiting seat (37). The lower end of the pull rod (38) extends into the connecting seat (36) and is slidably connected to the connecting seat (36), and a spring (39) is fixed between the pull rod (38) and the limiting seat (37).

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