Dry sand vibrating screen

Abstract

The utility model discloses a dry sand vibrating screen which comprises a placing base, a screening box is arranged above the placing base, the top of the screening box is connected with a filling hopper in a penetrating mode, the top of the placing base is fixedly connected with a crushing box, and a material returning mechanism is arranged on the crushing box. The material returning mechanism comprises two rotating shafts which are rotatably connected to one side of the crushing box in a penetrating mode, crushing rollers are fixedly arranged on the two rotating shafts in a sleeving mode, a connecting pipe is connected to one side of the crushing box in a penetrating mode, and a conveying pipe is fixedly connected to one end of the connecting pipe. According to the dry sand vibrating screen, sand materials which cannot pass through the second screening holes due to the large size in the screening box can be crushed and conveyed through the arranged material returning mechanism, so that the crushed sand materials can enter the screening box again to be vibrated and screened, and the situation that large-particle sand materials are mixed in the screened sand materials can be effectively prevented; and subsequent concrete processing is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of vibrating screens, in particular to a dry sand vibrating screen. Background Art

[0002] The term concrete refers to cement as a gelling material, sand and stone as aggregates, mixed with water in a certain proportion and stirred. Dry sand is an indispensable raw material for concrete. It is a necessary material in building decoration, small hardware, various decorative pulls, etc. The original sand and gravel raw materials contain a lot of impurities, so the sand and gravel need to be screened to meet the needs of concrete processing. The vibrating screen is a filtering mechanical separation equipment used for mud solid phase treatment, consisting of a screen and a vibrator.

[0003] The authorization announcement number CN 219616039 U discloses a dry sand vibrating screen for concrete processing, including a sand material outlet and a bottom plate, the bottom of the sand material outlet is directly opposite to the screen, and the edge of the screen is fixedly connected with a side plate. The practical advantages of the new type are: the block sand and other sand materials that cannot pass through the screen holes slide down along the screen and are put into the crusher. The motor on the crusher drives the crushing auger to rotate, crushing the block sand into fine sand and falling below the crusher, that is, the second concrete sand material area, and this sand material is distinguished from the sand material sieved out by the screen through the partition; the device can crush the agglomerated sand material while screening the sand on the vibrating screen, and distinguish it from the sand material sieved out by the screen, which can be used as concrete raw material, saving materials, and the device has high integration and compact structure, and can crush the agglomerated sand material while screening the sand, with efficient processing and convenient subsequent utilization, solving the problems existing in the prior art.

[0004] However, the vibrating screen has the following shortcomings: when in use, the device can vibrate and screen dry sand, and can crush larger sand at the same time. However, since the sand is often not aligned for screening after being crushed, larger sand is still mixed inside. If it is used directly, it will affect the quality of the finished concrete product and the use effect is not good.

[0005] Therefore, the utility model provides a dry sand vibrating screen to solve the above problems. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a dry sand vibrating screen to solve the above problems.

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: a dry sand vibrating screen, including a placement base, a screening box is arranged above the placement base, a filling hopper is connected through the top of the screening box, a crushing box is fixedly connected to the top of the placement base, and a material return mechanism is arranged on the crushing box;

[0008] The material return mechanism includes two rotating shafts that are rotatably connected to one side of the crushing box, and crushing rollers are fixedly sleeved on the two rotating shafts. A connecting pipe is connected to one side of the crushing box, and one end of the connecting pipe is fixedly connected to a conveying pipe. The conveying pipe is connected to the inside of the connecting pipe, and a feeding pipe is connected to the top of the conveying pipe. The feeding pipe is located above the filling hopper, and the top of the conveying pipe is fixedly connected to a first motor, and the output shaft of the first motor is fixedly connected to a conveying auger, and the bottom end of the conveying auger rotates and extends into the conveying pipe.

[0009] Preferably, both side outer walls of the screening box are fixedly connected with vibration motors, two symmetrically distributed inclined plates are fixedly connected inside the screening box, corresponding inclined plates are provided with drop-out openings, and one side inner wall of the screening box is fixedly connected with a guide plate, and the combination of the vibration motor, inclined plate, drop-out opening and guide plate can facilitate the rolling of dry sand in the screening box, making it easier to screen the dry sand.

[0010] Preferably, the corresponding inclined plate is provided with a plurality of first screening holes, which are equidistantly distributed, and the corresponding inclined plate is provided with a plurality of second screening holes, which are equidistantly distributed, and the size of the second screening holes is smaller than the first screening holes. By using the first screening holes and the second screening holes in combination, dry sand can be conveniently screened and the screening efficiency is higher.

[0011] Preferably, a protective cover is fixedly connected to the outer wall of one side of the crushing box, one end of the two rotating shafts are rotated to extend into the protective cover, and a second motor is fixedly connected to the outer wall of one side of the protective cover, and the output shaft of the second motor is connected to the corresponding rotating shaft. The protective cover and the second motor are used in combination to conveniently control the connected rotating shaft to rotate.

[0012] Preferably, a linkage gear is fixedly sleeved on the two rotating shafts, and two synchronous gears are rotatably connected in the protective cover, the two synchronous gears are meshed with each other, and the two synchronous gears are respectively meshed with corresponding linkage gears. The linkage gear and the synchronous gear are used in combination to facilitate the synchronous and reverse rotation of the two rotating shafts, thereby facilitating the two crushing rollers to crush the dry sand.

[0013] Preferably, two ear plates are fixedly connected to the outer walls on both sides of the screening box, four upright frames are fixedly connected to the top of the base, two strong springs are fixedly connected to the top of the four upright frames, and the tops of the strong springs are respectively connected to the corresponding ear plates. The ear plates, upright frames and strong springs are used in combination to conveniently support the screening box and facilitate its vibration.

[0014] Preferably, a collecting pool is fixedly connected to the top of the placing base, and a partition is fixedly connected to the top of the placing base. The collecting pool can conveniently collect dry sand of required size, and the partition can prevent larger dry sand from falling into the collecting pool.

[0015] Beneficial Effects

[0016] The utility model provides a dry sand vibrating screen. Compared with the prior art, it has the following beneficial effects:

[0017] (1) The dry sand vibrating screen can crush and transport the sand in the screening box that is too large to pass through the second screening hole through the return mechanism, so that the sand fragments can re-enter the screening box for vibration screening, thereby effectively preventing the screened sand from being mixed with large particles of sand, which is convenient for subsequent concrete processing.

[0018] (2) The dry sand vibrating screen can facilitate the rolling and movement of sand materials by means of the inclined plate and the guide plate arranged in the screening box, and can improve the screening efficiency of sand materials by means of the first screening hole and the second screening hole, thereby achieving better use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the external structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the back structure of the utility model;

[0021] Figure 3 It is a cross-sectional structural schematic diagram of the utility model;

[0022] Figure 4 It is a partial sectional assembly diagram of the material return mechanism in the utility model.

[0023] In the figure: 1. placing base; 2. screening box; 3. filling hopper; 4. crushing box; 5. rotating shaft; 6. crushing roller; 7. connecting pipe; 8. conveying pipe; 9. discharge pipe; 10. first motor; 11. conveying auger; 12. vibration motor; 13. inclined plate; 14. discharge port; 15. guide plate; 16. first screening hole; 17. second screening hole; 18. protective cover; 19. second motor; 20. linkage gear; 21. synchronous gear; 22. ear plate; 23. stand; 24. strong spring; 25. collection tank; 26. partition. 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] Embodiment 1:

[0026] See also Figures 1 to 4 A dry sand vibrating screen comprises a placing base 1, a screening box 2 is arranged above the placing base 1, a filling hopper 3 is connected through the top of the screening box 2, a crushing box 4 is fixedly connected to the top of the placing base 1, and a material return mechanism is arranged on the crushing box 4;

[0027] The material return mechanism includes two rotating shafts 5 that are rotatably connected to one side of the crushing box 4, and crushing rollers 6 are fixedly sleeved on the two rotating shafts 5. A connecting pipe 7 is connected to one side of the crushing box 4, and one end of the connecting pipe 7 is fixedly connected to a conveying pipe 8. The conveying pipe 8 is connected to the inside of the connecting pipe 7, and a feeding pipe 9 is connected to the top of the conveying pipe 8. The feeding pipe 9 is located above the filling bucket 3. The top of the conveying pipe 8 is fixedly connected to a first motor 10, and the output shaft of the first motor 10 is fixedly connected to a conveying auger 11. The bottom end of the conveying auger 11 rotates and extends into the conveying pipe 8.

[0028] Embodiment 2:

[0029] See also Figures 1 to 4This embodiment provides a technical solution based on the first embodiment: the outer walls of both sides of the screening box 2 are fixedly connected with a vibration motor 12, the screening box 2 is fixedly connected with two symmetrically distributed inclined plates 13, the corresponding inclined plates 13 are provided with a drop opening 14, and the inner wall of one side of the screening box 2 is fixedly connected with a guide plate 15; the corresponding inclined plates 13 are provided with a plurality of first screening holes 16, the plurality of first screening holes 16 are equidistantly distributed, the corresponding inclined plates 13 are provided with a plurality of second screening holes 17, the plurality of second screening holes 17 are equidistantly distributed, and the size of the second screening holes 17 is smaller than the first screening holes 16; the outer wall of one side of the crushing box 4 is fixedly connected with a protective cover 18, one end of the two rotating shafts 5 are rotated to extend into the protective cover 18, and the protective cover 1 A second motor 19 is fixedly connected to the outer wall of one side of 8, and the output shaft of the second motor 19 is connected to the corresponding rotating shaft 5; a linkage gear 20 is fixedly sleeved on the two rotating shafts 5, and two synchronous gears 21 are rotatably connected in the protective cover 18, the two synchronous gears 21 are meshed with each other, and the two synchronous gears 21 are respectively meshed with the corresponding linkage gears 20; two ear plates 22 are fixedly connected to the outer walls of both sides of the screening box 2, four vertical frames 23 are fixedly connected to the top of the placement base 1, and two strong springs 24 are fixedly connected to the top of the four vertical frames 23, and the tops of the strong springs 24 are respectively connected to the corresponding ear plates 22; a collecting tank 25 is fixedly connected to the top of the placement base 1, and a partition 26 is fixedly connected to the top of the placement base 1.

[0030] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] Working principle: When in use, the operator adds sand into the screening box 2 through the filling hopper 3, so that it falls onto the inclined plate 13. At this time, the two vibration motors 12 are started, and the vibration motor 12 drives the screening box 2 to vibrate, so that the sand on the inclined plate 13 rolls and moves accordingly. Some smaller sand falls directly through the first screening hole 16, and then moves to the inclined plate 13 below through the guide plate 15, and then passes through the second screening hole 17 for secondary screening. At the same time, larger sand and gravel cannot pass through the second screening hole 17 and will fall into the crushing box 4 along the slope of the inclined plate 13. At this time, the second screening hole 17 is started. The motor 19 and the second motor 19 drive the connected rotating shaft 5 to rotate. The rotating shaft 5 drives the other rotating shaft 5 to rotate synchronously in the opposite direction through the meshing relationship between the linkage gear 20 and the synchronous gear 21. Thus, the two crushing rollers 6 keep rotating synchronously in the opposite direction to crush the larger sand materials. The sand materials that have completed the crushing work will enter the conveying pipe 8 through the connecting pipe 7. At this time, the first motor 10 is started. The first motor 10 drives the conveying auger 11 to rotate. The conveying auger 11 conveys the sand materials in the conveying pipe 8 upward until it falls into the filling hopper 3 through the discharge pipe 9 for circulation screening.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] In the description of this article, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dry sand vibrating screen, comprising a base (1), characterized in that: A screening box (2) is arranged above the placing base (1), a filling hopper (3) is connected through the top of the screening box (2), a crushing box (4) is fixedly connected to the top of the placing base (1), and a material return mechanism is arranged on the crushing box (4); The material return mechanism comprises two rotating shafts (5) rotatably connected to one side of the crushing box (4), and crushing rollers (6) are fixedly sleeved on the two rotating shafts (5). A connecting pipe (7) is connected to one side of the crushing box (4), and one end of the connecting pipe (7) is fixedly connected to a conveying pipe (8), and the conveying pipe (8) is communicated with the inside of the connecting pipe (7). A feeding pipe (9) is connected to the top of the conveying pipe (8), and the feeding pipe (9) is located above the filling hopper (3). The top of the conveying pipe (8) is fixedly connected to a first motor (10), and the output shaft of the first motor (10) is fixedly connected to a conveying auger (11), and the bottom end of the conveying auger (11) rotates and extends into the conveying pipe (8).

2. A dry sand vibrating screen according to claim 1, characterized in that: Vibration motors (12) are fixedly connected to the outer walls of both sides of the screening box (2), two symmetrically distributed inclined plates (13) are fixedly connected inside the screening box (2), and corresponding inclined plates (13) are provided with drop openings (14), and a guide plate (15) is fixedly connected to the inner wall of one side of the screening box (2).

3. A dry sand vibrating screen according to claim 2, characterized in that: The corresponding inclined plate (13) is provided with a plurality of first screening holes (16), the plurality of the first screening holes (16) are distributed at equal intervals, and the corresponding inclined plate (13) is provided with a plurality of second screening holes (17), the plurality of the second screening holes (17) are distributed at equal intervals, and the size of the second screening holes (17) is smaller than that of the first screening holes (16).

4. A dry sand vibrating screen according to claim 1, characterized in that: A protective cover (18) is fixedly connected to an outer wall of one side of the crushing box (4), one end of each of the two rotating shafts (5) rotates and extends into the protective cover (18), and a second motor (19) is fixedly connected to an outer wall of one side of the protective cover (18), and an output shaft of the second motor (19) is connected to the corresponding rotating shaft (5).

5. A dry sand vibrating screen according to claim 4, characterized in that: A linkage gear (20) is fixedly sleeved on each of the two rotating shafts (5), and two synchronous gears (21) are rotatably connected in the protective cover (18). The two synchronous gears (21) are meshed with each other, and the two synchronous gears (21) are respectively meshed with the corresponding linkage gears (20).

6. The dry sand vibrating screen according to claim 1, characterized in that: Two ear plates (22) are fixedly connected to the outer walls on both sides of the screening box (2), four vertical frames (23) are fixedly connected to the top of the placement base (1), and two strong springs (24) are fixedly connected to the tops of the four vertical frames (23), and the tops of the strong springs (24) are respectively connected to the corresponding ear plates (22).

7. The dry sand vibrating screen according to claim 1, characterized in that: The top of the placement base (1) is fixedly connected to a collection tank (25), and the top of the placement base (1) is fixedly connected to a partition plate (26).

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