Sand screening machine facilitating classified screening

Abstract

The utility model discloses a sand screening machine convenient for classified screening, which relates to the technical field of sand screening machines and comprises a multi-stage screening component consisting of an outer screening drum, a connecting rod and an inner screening drum. Secondary screening holes and primary screening holes are formed in the outer side of the outer screen drum and the outer side of the inner screen drum respectively, and the mesh number of the primary screening holes is smaller than that of the secondary screening holes, so that screening of stones with different particle sizes is achieved. Multi-stage screening operation of materials can be achieved by arranging the structure of the inner screen drum and the outer screen drum, meanwhile, by arranging the connecting column and the self-weight impact hammer, when the connecting column rotates to be inclined upwards along with the outer screen drum, the self-weight impact hammer slides along the outer wall of the connecting column to impact the outer wall of the inner screen drum to achieve knocking vibration on the inner screen drum, and therefore the screening efficiency is improved. In this way, the gravel clamped on the inner sides of the primary screening holes are loosened and separated from the primary screening holes, the primary screening holes are prevented from being blocked, and therefore the device can keep the long-time efficient screening effect.

Description

Technical Field

[0001] The utility model relates to the technical field of sand screening machines, in particular to a sand screening machine which is convenient for graded screening. Background Art

[0002] The drum sand screening machine is a screening equipment that grades and screens material particles and particle sizes. It is often used in sand plants, stone plants and other scenarios. Its working principle is as follows: After the crushed stone enters the drum, on the one hand, it is screened as the drum rotates, and on the other hand, the stone with large particle size flows forward along the slope of the drum, and the small stone is screened out through the sieve holes on the drum, and then transported out manually or transported away by an external conveyor belt.

[0003] Most of the existing drum sand screening machines can only filter out two different levels of sand and gravel. If multiple levels of sand and gravel are required, a screening device needs to be added, which leads to certain limitations of the existing sand and gravel screening devices. Based on this, a sand screening machine that is convenient for graded screening is provided. Utility Model Content

[0004] The purpose of the present invention is to provide a sand screening machine which is convenient for graded screening in order to solve the problems in the above background.

[0005] To achieve the above object, the utility model provides the following technical solution: a sand screening machine that is convenient for graded screening, comprising a multi-stage screening assembly, wherein the multi-stage screening assembly is composed of an outer screen cylinder, a connecting rod, and an inner screen cylinder;

[0006] The inner sieve drum is distributed inside the outer sieve drum, and the connecting rods are provided in two groups, and each group of connecting rods includes a plurality of connecting rods. The two groups of connecting rods are symmetrically fixed to the inner sides of both ends of the outer sieve drum and fixedly connected to the outer wall of the inner sieve drum, so as to realize the connection between the inner sieve drum and the outer sieve drum;

[0007] The outer sides of the outer sieve drum and the inner sieve drum are respectively provided with secondary screening holes and primary screening holes, and the mesh number of the primary screening holes is smaller than the mesh number of the secondary screening holes, thereby achieving the screening of stones of different particle sizes;

[0008] A connecting column is fixedly connected between the inner side of the outer sieve drum and the outer side of the inner sieve drum, and a deadweight impact hammer is slidably sleeved on the outer side of the connecting column. When the connecting column rotates with the outer sieve drum to tilt downward, the deadweight impact hammer slides along the outer wall of the connecting column and impacts the inner wall of the outer sieve drum to achieve knocking vibration on the outer sieve drum. When the connecting column rotates with the outer sieve drum to tilt upward, the deadweight impact hammer slides along the outer wall of the connecting column and impacts the outer wall of the inner sieve drum to achieve knocking vibration on the inner sieve drum.

[0009] A support assembly is further provided below the multi-stage screening assembly, and the support assembly is used to provide rotation support for the multi-stage screening assembly.

[0010] As a further solution of the present invention: the connecting columns and self-weight impact hammers are arranged in multiple groups along the horizontal direction, each group of the connecting columns and self-weight impact hammers includes multiple connecting columns and self-weight impact hammers, and the multiple connecting columns and self-weight impact hammers in each group of the connecting columns and self-weight impact hammers are evenly distributed along the circumferential direction.

[0011] As a further solution of the present invention: the deadweight impact hammer is composed of an inner iron core and an outer rubber layer, the inner iron core is further sleeved on the outside of the connecting column, and the outer rubber layer covers the outside and upper and lower ends of the inner iron core.

[0012] As a further solution of the present invention: the support assembly includes a base, a rotating base, a roller, and a linkage shaft;

[0013] The rotating base is provided with four and is distributed in a matrix and fixed on the top of the base. The rollers are rotatably connected to the inner side of the rotating base and form a group of two. The two ends of the outer wall of the outer sieve drum are symmetrically fixedly connected to the limiting ring rail. The two groups of rollers are symmetrically distributed with the outer sieve drum as the center and roll in contact with the inner wall of the limiting ring rail.

[0014] The linkage shaft is respectively connected between two rollers of the two groups of rollers.

[0015] As a further solution of the present invention: the two ends of the inner screen drum protrude outside the two ends of the limiting ring rail respectively, and no primary screening holes are provided outside the inner area of the limiting ring rail and the part outside the limiting ring rail.

[0016] As a further solution of the present invention: a plurality of inner sieve cylinders can be provided, wherein the inner diameters of the plurality of inner sieve cylinders increase in sequence, the plurality of inner sieve cylinders are sequentially connected from the inside to the outside, and the lengths decrease in sequence, and the two ends of the inner sieve cylinder located on the innermost side protrude from the two ends of the outer inner sieve cylinders;

[0017] The number of primary screening holes on the plurality of inner screen cylinders increases from the inside to the outside;

[0018] A connecting column and a deadweight impact hammer are provided between two adjacent inner screen cylinders.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] By setting up the inner and outer sieve drum structures, multi-stage screening operations of materials can be achieved. At the same time, by setting connecting columns and deadweight impact hammers, when the connecting column rotates with the outer sieve drum to tilt upward, the deadweight impact hammer slides along the outer wall of the connecting column to impact the outer wall of the inner sieve drum to achieve knocking vibration on the inner sieve drum, thereby loosening the sand and gravel stuck on the inner side of the primary screening hole and separating it from the primary screening hole, avoiding blockage of the primary screening hole, so that the device can maintain a long-term high-efficiency screening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 This is a structural diagram of the utility model from another perspective;

[0023] Figure 3 It is a side sectional view of the multi-stage screening assembly of the utility model;

[0024] Figure 4 This is an end cross-sectional view of the multi-stage screening assembly of the present invention.

[0025] In the figure: 1. Multi-stage screening assembly; 101. Outer screen drum; 102. Connecting rod; 103. Inner screen drum; 104. Secondary screening hole; 105. Primary screening hole; 106. Limiting ring rail; 2. Support assembly; 201. Base; 202. Rotating base; 203. Roller; 204. Linkage shaft; 3. Connecting column; 4. Deadweight impact hammer. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figures 1 to 4 In an embodiment of the present invention, a sand screening machine for grading and screening includes a multi-stage screening assembly 1, which is composed of an outer screen drum 101, a connecting rod 102, and an inner screen drum 103;

[0028] The inner sieve drum 103 is distributed inside the outer sieve drum 101. Two groups of connecting rods 102 are provided, and each group of connecting rods 102 includes multiple connecting rods 102. The two groups of connecting rods 102 are symmetrically fixed to the inner sides of both ends of the outer sieve drum 101 and fixedly connected to the outer wall of the inner sieve drum 103, so as to realize the connection between the inner sieve drum 103 and the outer sieve drum 101.

[0029] The outer sides of the outer sieve drum 101 and the inner sieve drum 103 are respectively provided with secondary screening holes 104 and primary screening holes 105. The mesh number of the primary screening holes 105 is smaller than that of the secondary screening holes 104, thereby achieving the screening of stones of different particle sizes.

[0030] A connecting column 3 is further fixedly connected between the inner side of the outer sieve drum 101 and the outer side of the inner sieve drum 103. A deadweight impact hammer 4 is slidably sleeved on the outer side of the connecting column 3. When the connecting column 3 rotates with the outer sieve drum 101 to tilt downward, the deadweight impact hammer 4 slides along the outer wall of the connecting column 3 and impacts the inner wall of the outer sieve drum 101 to achieve percussion vibration on the outer sieve drum 101. When the connecting column 3 rotates with the outer sieve drum 101 to tilt upward, the deadweight impact hammer 4 slides along the outer wall of the connecting column 3 and impacts the outer wall of the inner sieve drum 103 to achieve percussion vibration on the inner sieve drum 103.

[0031] A support assembly 2 is further provided below the multi-stage screening assembly 1, and the support assembly 2 is used to provide rotation support for the multi-stage screening assembly 1;

[0032] The support assembly 2 includes a base 201, a rotating base 202, a roller 203, and a linkage shaft 204;

[0033] Four rotating bases 202 are provided and arranged in a matrix and fixed on the top of the base 201. The rollers 203 are rotatably connected to the inner side of the rotating base 202 and are grouped in pairs. The outer wall of the outer sieve drum 101 is symmetrically fixedly connected to the limiting ring rail 106 at both ends. The two groups of rollers 203 are symmetrically distributed around the outer sieve drum 101 and roll in contact with the inner wall of the limiting ring rail 106.

[0034] The linkage shaft 204 is connected between two rollers 203 of the two groups of rollers 203 .

[0035] In this embodiment, it should be noted that the linkage shaft 204 is connected to the external motor through a coupling, and the external motor drives the roller 203 to rotate, thereby driving the entire multi-stage screening assembly 1 to rotate, thereby achieving the screening operation. Since this structure is a prior art, it is not described in detail.

[0036] When this sand screening machine is in operation, the material to be screened is guided to the inside of the inner screen drum 103 through the conveying device (it should be supplemented that: when the entire device is placed, the entire device is in an inclined state, and the feed end of the inner screen drum 103 is higher than the discharge end). At this time, the material with a particle size smaller than the aperture of the primary screening hole 105 will pass through the primary screening hole 105 and fall into the inner side of the outer screen drum 101. After that, the material with a particle size smaller than the secondary screening hole 104 will pass through the secondary screening hole 104 and fall to the outside of the outer screen drum 101. The intercepted materials move toward the front end along the inclined inner walls of the inner screen drum 103 and the outer screen drum 101 respectively, so that three different levels of sand and gravel are screened out;

[0037] At the same time, during the rotation of the multi-stage screening assembly 1, the connecting column 3 and the deadweight impact hammer 4 rotate synchronously in a circular motion. When the connecting column 3 rotates with the outer screen drum 101 to tilt downward, the deadweight impact hammer 4 slides along the outer wall of the connecting column 3 and impacts the inner wall of the outer screen drum 101 to achieve a knocking vibration on the outer screen drum 101, thereby loosening the sand and gravel stuck inside the secondary screening hole 104 and separating it from the secondary screening hole 104, thereby avoiding clogging of the secondary screening hole 104.

[0038] When the connecting column 3 rotates with the outer sieve drum 101 to tilt upward, the deadweight impact hammer 4 slides along the outer wall of the connecting column 3 and impacts the outer wall of the inner sieve drum 103 to achieve knocking vibration on the inner sieve drum 103, thereby loosening the sand and gravel stuck on the inner side of the primary screening hole 105 and separating it from the primary screening hole 105, avoiding blockage of the primary screening hole 105, so that the device can maintain a long-term high-efficiency screening effect.

[0039] Please refer to Figures 1 to 4 , multiple groups of connecting columns 3 and self-weight impact hammers 4 are arranged in the horizontal direction, each group of connecting columns 3 and self-weight impact hammers 4 includes multiple connecting columns 3 and self-weight impact hammers 4, and the multiple connecting columns 3 and self-weight impact hammers 4 in each group of connecting columns 3 and self-weight impact hammers 4 are evenly distributed along the circumferential direction;

[0040] The deadweight impact hammer 4 is composed of an inner iron core and an outer rubber layer. The inner iron core is sleeved on the outer side of the connecting column 3, and the outer rubber layer is coated on the outer side and the upper and lower ends of the inner iron core.

[0041] In this embodiment: this structure can provide sufficient hammer vibration force for the outer sieve drum 101 and the inner sieve drum 103, thereby achieving a good anti-clogging effect;

[0042] The outer rubber layer can prevent the deadweight impact hammer 4 from causing hard impact on the outer sieve drum 101 and the inner sieve drum 103 .

[0043] Please refer to Figures 1 to 4 , the two ends of the inner sieve drum 103 protrude outside the two ends of the limiting ring rail 106 respectively, and the inner sieve drum 103 is located in the inner area of the limiting ring rail 106 and the outer side of the limiting ring rail 106 without a primary screening hole 105;

[0044] Multiple inner sieve drums 103 can be provided, with inner diameters of the multiple inner sieve drums 103 increasing in sequence, being connected in sequence from the inside to the outside, and lengths decreasing in sequence, with both ends of the innermost inner sieve drum 103 protruding from both ends of the outer inner sieve drums 103;

[0045] The mesh sizes of the primary screening holes 105 on the multiple inner screen cylinders 103 increase from the inside to the outside;

[0046] A connecting column 3 and a deadweight impact hammer 4 are provided between two adjacent inner screen drums 103 .

[0047] In this embodiment, the number of inner sieve drums 103 can be set according to the classification requirements. For example, two inner sieve drums 103 can achieve four different levels of sand and gravel screening, and three inner sieve drums 103 can achieve five different levels of sand and gravel screening.

[0048] When loading, the material is fed from the feeding end of the innermost inner sieve drum 103, and the feeding ends of the other inner sieve drums 103 can be kept flush with the outer sieve drum 101, and the discharge ends of all the inner sieve drums 103 are sequentially protruding from the inside to the outside, so that the discharge positions are sequentially staggered, which is convenient for later material collection and diversion;

[0049] By arranging the connecting column 3 and the deadweight impact hammer 4 between two adjacent inner sieve drums 103, not only the fixation of multiple inner sieve drums 103 can be achieved, but also the anti-clogging effect during the operation of the inner sieve drum 103 is guaranteed.

[0050] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sand screening machine for grading and screening, comprising a multi-stage screening assembly (1), characterized in that: The multi-stage screening assembly (1) is composed of an outer screen drum (101), a connecting rod (102), and an inner screen drum (103); The inner sieve drum (103) is distributed inside the outer sieve drum (101), and two groups of connecting rods (102) are provided, and each group of connecting rods (102) includes a plurality of connecting rods (102). The two groups of connecting rods (102) are symmetrically fixed to the inner sides of both ends of the outer sieve drum (101) and fixedly connected to the outer wall of the inner sieve drum (103), so as to realize the connection between the inner sieve drum (103) and the outer sieve drum (101); The outer sides of the outer sieve drum (101) and the inner sieve drum (103) are respectively provided with secondary screening holes (104) and primary screening holes (105), and the mesh number of the primary screening holes (105) is smaller than the mesh number of the secondary screening holes (104), thereby achieving the screening of stones of different particle sizes; A connecting column (3) is fixedly connected between the inner side of the outer sieve drum (101) and the outer side of the inner sieve drum (103); a deadweight impact hammer (4) is slidably sleeved on the outer side of the connecting column (3); when the connecting column (3) rotates with the outer sieve drum (101) to tilt downward, the deadweight impact hammer (4) slides along the outer wall of the connecting column (3) to impact the inner wall of the outer sieve drum (101) to achieve percussion vibration on the outer sieve drum (101); when the connecting column (3) rotates with the outer sieve drum (101) to tilt upward, the deadweight impact hammer (4) slides along the outer wall of the connecting column (3) to impact the outer wall of the inner sieve drum (103) to achieve percussion vibration on the inner sieve drum (103); A support assembly (2) is also provided below the multi-stage screening assembly (1), and the support assembly (2) is used to provide rotational support for the multi-stage screening assembly (1).

2. A sand screening machine for easy classification and screening according to claim 1, characterized in that: The connecting columns (3) and the self-weight impact hammers (4) are arranged in multiple groups along the horizontal direction, each group of the connecting columns (3) and the self-weight impact hammers (4) includes multiple connecting columns (3) and the self-weight impact hammers (4), and the multiple connecting columns (3) and the self-weight impact hammers (4) in each group of the connecting columns (3) and the self-weight impact hammers (4) are evenly distributed along the circumferential direction.

3. A sand screening machine for easy classification and screening according to claim 1, characterized in that: The deadweight impact hammer (4) is composed of an inner iron core and an outer rubber layer. The inner iron core is sleeved on the outer side of the connecting column (3), and the outer rubber layer is coated on the outer side and upper and lower ends of the inner iron core.

4. A sand screening machine for easy classification and screening according to claim 1, characterized in that: The support assembly (2) comprises a base (201), a rotating base (202), a roller (203), and a linkage shaft (204); The rotating base (202) is provided with four and is distributed in a matrix and fixed on the top of the base (201); the rollers (203) are rotatably connected to the inner side of the rotating base (202) and are arranged in pairs; the outer wall of the outer sieve drum (101) is symmetrically fixedly connected to the limiting ring rail (106); the two groups of rollers (203) are symmetrically distributed around the outer sieve drum (101) and are rollingly fitted with the inner wall of the limiting ring rail (106); The linkage shaft (204) is respectively connected between two rollers (203) of the two groups of rollers (203).

5. A sand screening machine for grading and screening according to claim 4, characterized in that: The two ends of the inner sieve drum (103) protrude outside the two ends of the limiting ring rail (106), and the inner sieve drum (103) is located inside the limiting ring rail (106) and outside the limiting ring rail (106) without a primary screening hole (105).

6. A sand screening machine for easy classification and screening according to claim 5, characterized in that: The inner sieve cylinder (103) can be provided in plurality, the inner diameters of the plurality of inner sieve cylinders (103) are increased in sequence, are connected in sequence from the inside to the outside, and have decreased in length in sequence, and the two ends of the inner sieve cylinder (103) located on the innermost side protrude from the two ends of the outer inner sieve cylinder (103); The mesh sizes of the primary screening holes (105) on the plurality of inner screen cylinders (103) increase from the inside to the outside; A connecting column (3) and a deadweight impact hammer (4) are provided between two adjacent inner screen cylinders (103).

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