CN104353608B - Whirling vibration screening machine - Google Patents

Abstract

The invention relates to a rotary vibrating screening machine, which includes a cylindrical screen box. The screening machine also includes: a rotating mechanism, which includes a rotating shaft and a driving mechanism for driving the rotating shaft. The rotating shaft is rotatably Set on the elastic support, the screen box is set and fixed on the rotating shaft; the vibration mechanism that drives the elastic support to vibrate; the multi-stage screening mechanism, including multi-stage screening groups that are inclined from top to bottom. The screening group is fixed between the screen box and the rotating shaft; the diameter of the sieve holes in the multi-stage screening group decreases gradually from top to bottom; the downward-sloping ends of the screening groups at all levels are respectively equipped with screens for the oversize and undersize. Corresponding discharge port; the upper end of the screen box is provided with a feed port for evenly spreading the material on the upper end surface of the screen group at the highest position. The invention has a simple structure, can carry out multi-stage screening according to production needs, effectively improves production efficiency and uniformity of screened particles, and reduces production cost.

Description

Rotary Vibrating Screening Machine

technical field

The invention relates to a solid material screening machine, in particular to a rotary vibration screening machine.

Background technique

The screening machine is a vibrating screening mechanical equipment that uses the relative movement between the bulk material and the screen surface to make some particles pass through the screen holes, and divide sand, gravel, crushed stone and other materials into different grades according to the particle size. During the sieving process, the particles in the material whose particle size is smaller than the sieve size pass through the sieve surface and fall under the sieve, which is called undersize. Particles with a particle size larger than the sieve size remain on the sieve and are called oversize. Classifying sieves are widely used in the screening of various particles, small blocks, powders and other materials, and have wide adaptability. equipment.

Existing vibratory screening mechanical equipment includes a vibrating shaft, on which a sieve plate is elastically connected, and a vibrating motor is installed on the sieve plate, and the vibration of the vibrating motor causes the sieve plate to vibrate, thereby realizing the screening of materials. Because the vibration frequency of the vibrating motor is too frequent, there is a disadvantage of low screening efficiency when screening materials with large particle size differences, and only a single separation can be performed, resulting in low production efficiency. Although there are a series of improvements made to it in the follow-up, such as setting a plurality of screening machines in parallel through belt conveyors (Chinese patent document CN103316842A), but its floor area is large, the investment is large, and the production cost is increased; it is designed to be cylindrical. The multistage rotary grading screen in the multistage filter area (Chinese patent document CN202490762U) then increases the working load of the motor due to the gravity effect of the material itself; It will increase the maintenance cost and increase the investment cost.

Therefore, how to provide a multi-stage screening machine with simple structure, low energy consumption and low maintenance cost without affecting the screening efficiency has become an urgent problem to be solved by those skilled in the art.

Contents of the invention

In view of the above shortcomings, the technical problem to be solved by the present invention is to provide a rotary vibration screening machine with high screening efficiency, simple structure, energy consumption and low maintenance cost.

In order to achieve the above object, the present invention is achieved through the following technical solutions:

A rotary vibration screening machine, including a cylindrical screen box, the screening machine also includes the following components:

A rotating mechanism, the rotating mechanism includes a rotating shaft and a driving mechanism for driving the rotating shaft to rotate, the rotating shaft is rotatably arranged on the elastic support, and the screen box is sleeved and fixed on the rotating shaft;

The screening machine also includes a vibration mechanism that drives the elastic support to vibrate;

Multi-stage screening mechanism, including multi-stage screening groups that are inclined from top to bottom, this multi-stage screening group is fixed between the screen box and the rotating shaft; the screening group at the highest position is from the side near the rotating shaft The side close to the screen box is gradually inclined downward, and the inclination direction of the adjacent sieve groups is opposite; other sieve groups except the sieve group at the lowest position are all equipped with a device at the lowest end of the inclination direction to discharge the oversize. The outlet of the sieve box and the discharge port for discharging the undersize to the next stage of the screening group, the lowest position of the screening group is provided with a sieve at the lowest end of the inclination direction to discharge the oversize and the undersize respectively. The outlet of the box; the diameter of the sieve holes in the multi-stage sieve group decreases gradually from top to bottom;

The upper end of the sieve box is provided with a feed port for evenly spreading the material on the upper end surface of the sieve group at the highest position.

The aforementioned multi-stage screening mechanism has n stages, and n is a positive integer greater than 1.

Preferably, any primary screening group is composed of a sieve plate with a mesh and a partition, the partition is arranged below the sieve plate of the same level of screening group, and the plate surface of the partition plate is the same as the plate surface of the sieve plate. parallel.

Preferably, the upper side of the feed inlet is provided with an annular sprinkler for spraying water on the material at the feed inlet; the annular sprinkler is sheathed and fixed on the rotating shaft.

Further, the sieve plate is composed of a sieve with meshes and a sieve frame, and the sieve is arranged on the upper side of the sieve frame.

Further, the inclination angle of the sieve plate is 10°-25°.

Further, the upper surface of the partition facing the sieve plate is set as a smooth surface that facilitates the sliding of materials.

Further, the elastic support includes an elastic support assembly and a support for supporting the rotating shaft and forming a rotation fit with the rotating shaft. The support is fixed on the base through the elastic support assembly; the screen box and the support cooperate to form a multi-stage screen An enclosed space within which a sub-organization is enclosed.

Further, the vibration mechanism includes a vibration motor and an eccentric assembly fixed on the base; the eccentric assembly is fixed on the support and forms a rotational cooperation with the support, and the vibration motor drives the eccentric assembly to rotate through a belt. Further, an annular sprinkler is installed directly above the feeding pan.

Further, the eccentric assembly includes a hollow cylinder and a weight; the weight is fixed on the inner wall of the cylinder; the vibration motor drives the cylinder to rotate through a belt.

Further, the driving mechanism in the rotating mechanism includes a rotating motor; the rotating motor drives the rotating shaft to rotate through a belt.

The beneficial effects of the present invention are:

1) The sieve plate group in the present invention is provided with a plurality of screens with different apertures, which can complete the screening of various particle sizes, thereby greatly improving production efficiency.

The multi-stage screening group is fixedly arranged between the screen box and the rotating shaft, and is arranged in an inclined shape from top to bottom. The first-stage screening group at the highest position is gradually inclined from the side close to the rotating shaft to the side close to the screen box. It is inclined downward, while the inclination direction of the adjacent second-stage screening group is opposite. It gradually slopes downward from the side close to the screen box to the side close to the rotating shaft; On the outside of the screen box, in the first-stage sieve group, the undersize material falling from the sieve plate into the partition plate slides to the inclined end of the partition plate during the vibration of the screen box, and falls into the screen of the second-stage sieve group. On the plate, it enters the second-stage screening process; similarly, the undersize material falling into the partition in the second-stage screening group slides down to the end of the partition during the vibration of the screen box and just falls into the third-stage screening group. On the sieve plate, enter the third-stage screening process, and then continue to slide down in this way until the multi-stage particle size screening is completed.

In the present invention, the screening group at the highest position gradually slopes downward from the side close to the rotating shaft to the side close to the screen box, and the multi-stage screening mechanism in which adjacent screening groups tilt in opposite directions ensures that the screen box works smoothly. Continuity ensures high screening efficiency.

2) When the rotating motor drives the rotating shaft to rotate through the belt, the rotating shaft drives the screen box and the multi-stage screening mechanism to rotate; at this time, the vibration motor also drives the cylinder to rotate through the belt, and the inner wall of the cylinder is fixed with a weight block, so that when the vibration motor drives the cylinder to rotate through the belt, the weight rotates with the cylinder, causing the cylinder to jump or vibrate. Since the cylinder is fixedly connected to the bracket, the bracket also vibrates accordingly; thus , The rotating motor and the vibrating motor cooperate with each other to make the screen box and the multi-stage screening mechanism vibrate while rotating.

The above structural form of the present invention greatly reduces the working load of the motor and reduces energy consumption costs; in addition, since each stage of the sieve plate vibrates while rotating, the materials can be fully dispersed along the upper surface of the sieve plate It ensures the uniformity of the particle size distribution of the screening material along the surface of the sieve plate, and improves the efficiency of material screening.

2), the sieve in the present invention is covered with sieve holes, which increases the effective contact between the material and the sieve holes, and further improves the production efficiency; a sieve frame is provided below the sieve, which can increase the structural strength of the sieve, ensuring that the sieve is It can work stably and reliably during the vibration process and improve the service life of the screen. The upper surface of the partition is set to be smooth and parallel to the surface of the sieve plate, which is conducive to making the undersize that passes through the sieve holes fall to the upper surface of the corresponding partition and quickly slide down to the sieve plate of the next stage of screening group .

3) In the present invention, the sieve plates and partitions in the same level of screening group are all set at an inclination angle of 10° to 25°, within this angle range, the sliding speed of the material can be effectively controlled within a suitable range. If the inclination angle increases, the material will slide faster due to gravity, which is not conducive to the full screening of the material; if the inclination angle is too small, it will cause the sieve material and the sieve material to slide too slowly, which will easily cause the material to accumulate. reduce screening efficiency.

4), the present invention is provided with annular sprinkler at the upper end of feed inlet, can effectively control the generation of dust, protects the environment; Sieve plate and clapboard) for effective cleaning.

5) The base and the bracket of the present invention are connected by an elastic support assembly. During the rotary vibration process of the rotary vibration screening machine, due to the elastic buffering effect, the base has a better vibration damping effect and reduces the load on the base.

6) According to the needs of different production occasions, the present invention can conveniently add more screening groups in the screen box without replacing the screening machine equipment, thereby saving equipment costs and having wider applicability in industrial production.

Description of drawings

Fig. 1, 2 are structural representations of the present invention.

Figure 3 is a front view of the screen.

Figure 4 is a schematic structural view of the screen frame.

The meanings of the marks in the figure are as follows:

1-screen box 2-rotating motor 3-rotating shaft

4-Bearing 5-Inlet 6-Ring water sprayer

7-bracket 8-vibration motor 9-weight

10-cylinder 11-base 12-elastic support assembly

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the rotary vibrating screening machine in this embodiment is a three-stage screening machine, that is, the screening machine contains three-stage screening groups.

The rotating shaft 3 is rotatably fixed on the support 7 (the support 7 is not completely drawn in Figs. 1 and 2), that is, as shown in Fig. It forms a rotation fit with the bracket 7; the bracket 7 is fixed on the base 11 through the elastic support component 12. The rotating motor 2 is fixed on the upper end of the bracket 7. Of course, the rotating motor 2 can also be fixed on other fixing seats, as long as it is ensured that the rotating motor 2 can continuously and reliably drive the rotating shaft 3 to rotate.

The rotating motor 2 is connected to the rotating shaft 3 through a belt, and the belt is sleeved on the uppermost end of the rotating shaft 3, that is, the rotating motor 2 drives the rotating shaft 3 to rotate through the belt.

The multi-stage screening group is fixedly arranged between the screen box 1 and the rotating shaft 3. The specific description of the screening group is as follows:

The first-stage screening group includes sieve plate S1 and partition plate G1, wherein the higher end of the continuously inclined sieve plate S1 is fixedly connected to the rotating shaft 3, and the lower end is fixedly connected to the inner wall of the screen box 1. The sieve plate S1 The end of the lower end of the sieve plate is provided with an inclined discharge port P1 for discharging the sieve material, while the continuously inclined partition G1 has a smooth surface and is parallel to the plate surface of the sieve plate S1, and the higher end of the partition G1 is also fixed Connected to the rotating shaft 3, the end of the lower end of the partition G1 is provided with a discharge port for discharging the undersize of the sieve plate S1 to the second-stage sieve group;

The second-stage screening group includes sieve plate S2 and partition plate G2, wherein the higher end of the continuously inclined sieve plate S2 is fixedly connected to the inner wall of the screen box 1, and the lower end of the rotating shaft 3 is provided with a sieve plate S2 The vertical discharge pipe for discharging the oversize, the vertical discharge pipe is sleeved on the outside of the rotating shaft 3, and the bottom opening of the vertical discharge pipe leading to the lower side of the support 7 forms a vertical discharge port P2; continuous inclination The surface of the partition G2 is smooth and parallel to the surface of the sieve plate S2. The higher end of the partition G2 is also fixedly connected to the inner wall of the screen box 1. The end of the lower end of the partition G2 is provided with a The undersize is discharged to the discharge port of the third stage screening group;

The third-stage screening group includes a sieve plate S3 and a partition G3, wherein the higher end of the continuously inclined sieve plate S3 is fixedly connected to the vertical discharge pipe in the second-stage sieving group, and the lower end of the sieve plate S3 There is a vertical discharge port P3 at the end to discharge the oversize, and the vertical discharge port P3 is set close to the inner wall of the screen box 1 and facing the bottom of the screen box 1; the continuously inclined partition G3 has a smooth surface and is in line with the screen plate S3 The plate surfaces are parallel, and the higher end of the partition G3 is also fixedly connected to the vertical discharge pipe in the second-stage screening group. The vertical discharge port P4; the inclination angles of the sieve plates and partition plates in the three sets of screening groups are kept between 10° and 25°.

Therefore, the rotating shaft 3 drives the rotation of the above three sets of screening groups during the rotation process, and the bracket 7 is used to support the screen box 1 and the rotating shaft 3 without rotation.

As shown in Figures 1 and 2, the present invention is also provided with a vibrating mechanism at the bottom of the support 7, and the vibrating mechanism includes a vibrating motor 8, and the vibrating motor 8 and the cylinder 10 are connected together by a belt. Weight 9, when the vibration motor 8 drives the cylinder 10 to rotate through the belt, the weight 9 rotates with the cylinder 10 to cause the vibration of the cylinder 10, which in turn causes the vibration of the bracket 7, so that the rotation mechanism in the present invention Working together with the vibrating mechanism, the screening group in the rotary vibrating screening machine vibrates while rotating.

The vibrating mechanism can be set as two or more as shown in Figure 1, or as one as shown in Figure 2, as long as it can ensure the uniformity and constantness of the vibration process.

The working process of the present invention will be described in detail below in conjunction with the accompanying drawings.

When starting to work, the annular water sprayer 6 sprays water on the material, the material is wetted, and the material enters the rotary vibrating screening machine through the feed port 5 and rotates and vibrates at the same time. The material first falls on the screen surface of the sieve plate S1 and passes through After a sufficient material screening process, the material whose particle size is larger than the sieve hole of the sieve plate S1 remains on the sieve surface and is discharged from the discharge port P1, and the material whose particle size is smaller than the sieve hole size of the sieve plate S1 falls through the sieve hole to the Separator G1, and slide down to the sieve plate S2 along the smooth surface of the separator G1;

After entering the second-stage screening group, after sufficient material screening process, the material whose particle size is larger than the mesh size of the sieve plate S2 remains on the screen surface and is discharged from the discharge port P2, and the particle size is smaller than the mesh size of the sieve plate S2. The material falls through the sieve hole to the partition G2, and slides down the smooth surface of the partition G2 to the sieve plate S3;

After entering the third stage sieve group, after sufficient material sieving process, the material whose particle size is larger than the sieve hole size of the sieve plate S2 remains on the sieve surface and is discharged from the discharge port P3, and the particle size is smaller than the sieve plate S2 sieve size. The material falls through the sieve hole to the partition G3, slides down the smooth surface of the partition G3, and then is discharged from the discharge port P4.

The screening machine in this embodiment finally realizes 4 particle size classifications of materials.

As shown in Figures 3 and 4, a screen frame J is provided under the screen W, which can effectively increase the structural strength of the screen, ensure that the screen can work stably and reliably during the vibration process, and improve the service life of the screen.

The present invention can also add more levels of screening groups according to actual production needs, so as to complete the screening of more granularity levels for materials.

Claims (10)

1. a rotary vibration screening machine, comprising a cylindrical sieve box (1), is characterized in that this screening machine also includes the following components: The rotating mechanism includes a rotating shaft (3) and a driving mechanism for driving the rotating shaft (3), the rotating shaft (3) is rotatably arranged on an elastic support, and the screen box (1) is sleeved and fixed on the rotating shaft ( 3) on; The screening machine also includes a vibration mechanism that drives the elastic support to vibrate; Multi-stage screening mechanism, including multi-stage screening groups inclined from top to bottom, this multi-stage screening group is fixed between the screen box (1) and the rotating shaft (3); the screening group at the highest position From the side close to the rotating shaft (3) to the side close to the screen box (1), it gradually inclines downward, and the inclination directions of adjacent screening groups are opposite; The lowest end of the screen is equipped with a discharge port for discharging the oversize material out of the screen box (1) and a discharge port for discharging the undersize material to the next stage of the screen group. The screen group at the lowest position is at the lowest The end is provided with an outlet for discharging the oversize and undersize out of the sieve box (1); the diameter of the sieve holes in the multi-stage sieve group decreases gradually from top to bottom; The upper end of the sieve box (1) is provided with a feed port (5) for uniformly spreading materials on the upper end surface of the sieve group at the highest position. 2. The rotary vibrating sieving machine according to claim 1, characterized in that: any first-level screening group is composed of a sieve plate and a partition with mesh, and the partition is arranged on the sieve plate of the same-level screening group. Below, and the plate surface of the separator is parallel to the plate surface of the sieve plate. 3. The rotary vibrating screening machine according to claim 1, characterized in that: the upper side of the feed port (5) is provided with an annular water sprayer (6) for spraying water to the material at the feed port; The annular water sprayer (6) is sheathed and fixed on the rotating shaft (3). 4. The rotary vibrating screening machine according to claim 2, characterized in that: the sieve plate is made of a screen (W) with meshes and a sieve frame (J), and the screen (W) is arranged on The upper side of the screen frame (J). 5. The rotary vibration screening machine according to claim 2, characterized in that: the inclination angle of the sieve plate is 10°-25°. 6. The rotary vibrating screening machine according to claim 2, characterized in that: the upper surface of the partition plate facing the sieve plate is set as a smooth surface to facilitate the sliding of materials. 7. The rotary vibrating screening machine according to any one of claims 1 to 6, characterized in that: the elastic support includes an elastic support assembly (12) and is used to support the rotating shaft (3) and form a rotation with the rotating shaft (3). A matching bracket (7), the bracket (7) is fixed on the base (11) through an elastic support assembly (12); the screen box (1) and the bracket (7) cooperate to form a multi-stage screening mechanism enclosed space within it. 8. The rotary vibration screening machine according to claim 7, characterized in that: the vibration mechanism includes a vibration motor (8) and an eccentric assembly fixed on the base (11); the eccentric assembly is fixed on the bracket (7) and form rotational cooperation with the bracket (7), the vibration motor (8) drives the eccentric assembly to rotate through a belt. 9. The rotary vibrating screening machine according to claim 8, characterized in that: the eccentric assembly comprises a hollow cylinder (10) and a weight (9); the weight (9) is fixed on the cylinder (10) ) on the inner wall surface; the vibration motor (8) drives the cylinder (10) to rotate through a belt. 10. The rotary vibration screening machine according to claim 7, characterized in that: the driving mechanism in the rotary mechanism includes a rotary motor (2); the rotary motor (2) drives the rotating shaft (3) to rotate through a belt.