CN212216190U

CN212216190U - High-efficient compound double-deck shale shaker

Info

Publication number: CN212216190U
Application number: CN202020717776.6U
Authority: CN
Inventors: 刘锡水; 高瑶; 陶伟伟; 郝其昌
Original assignee: Maanshan Tiangong Technology Co ltd
Current assignee: Maanshan Tiangong Technology Co ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2020-12-25
Anticipated expiration: 2030-05-06

Abstract

The utility model discloses a high-efficient compound double-deck shale shaker belongs to shale shaker technical field. The vibrating screen comprises a main screen frame, a floating screen frame, a vibration exciter, a shearing spring, a driving device, a support, an upper screen plate and a lower flexible screen plate; the floating screen frame is fixedly connected with the main screen frame through a shearing spring, the lower-layer flexible screen plate is arranged between the lower-layer fixed beam and the floating beam, the driving device is arranged on the supporting frame positioned on one side of the vibrating screen, the vibration exciter is arranged in the vibration exciter mounting hole, and the driving device is connected with the vibration exciter through a coupling. The utility model is a composite double-layer structure, which is a complex of a circular vibrating screen and a relaxation screen; the upper-layer sieve plate adopts a traditional fixed sieve plate, and the lower-layer flexible sieve plate adopts a flexible polyurethane sieve plate. The utility model has the characteristics of large treatment capacity, high efficiency and fine fraction screening etc.

Description

High-efficient compound double-deck shale shaker

The technical field is as follows:

the utility model belongs to the technical field of the shale shaker, a fine fraction screening machinery of circle sieve, relaxation sieve that shakes is related to, concretely relates to high-efficient compound double-deck shale shaker.

Background art:

the vibration screening machine is the main equipment for crushing and grading raw material ores or grading and sorting products in various mines, and particularly in the dry screening process flow, the material with the grading particle size of less than 5mm is very difficult to screen, and the screening efficiency is low. The traditional circular vibrating screen and the traditional linear screen can not well solve the problems. Due to the reasons of large fine powder amount, unstable water content, mud content or high viscosity of materials and the like, the sieve is often stuck, i.e. sieve pores are blocked, stuck and hardened by the fine materials, so that the sieve plate becomes a blind plate, the sieving efficiency is greatly reduced or even stopped, the sieve plate can only be manually cleaned by stopping the machine, the sieving function is recovered, time and labor are wasted, the working efficiency is not high, and the yield is greatly reduced.

The flip-flow screen can well solve the screening problem of fine-grained or easily blocked materials. The relaxation sieve plate can generate acceleration of 30-50 g (gravity acceleration) at the relaxation moment, and the flexible sieve plate has a self-cleaning characteristic, so that the material is bounced and loosened, and the sieve is easier to pass through. Therefore, the flip-flow screen does not block holes and is efficient. However, the relaxation sieve is suitable for sieving thin material layers, if the thickness of the amount of the materials which are accumulated on the sieve surface and do not pass through the sieve is too large, the relaxation performance of the relaxation sieve is lost, the sieving efficiency is sharply reduced, and the normal sieving can be recovered only by reducing the treatment amount. Meanwhile, the sieve plate is expensive, the thickness of the sieve plate is usually 4-6 mm, and if the crushed materials are directly thrown into the tension sieve plate, rapid abrasion and damage of the flexible sieve plate can be caused. Therefore, the single-layer screen has small treatment capacity and low cost performance.

The invention content is as follows:

the utility model discloses aim at solving the high-efficient screening of the finer fraction (< 5mm) of mineral, provide a high-efficient compound double-deck shale shaker. The utility model discloses can improve screening production efficiency, energy-conserving increase, effectively improve unit throughput simultaneously, provide the fine powder sieve machine of high price/performance ratio.

The utility model provides a pair of high-efficient compound double-deck shale shaker includes main reel 1, unsteady reel 2, two vibration exciters 3 that the structure is the same, shearing spring 4, drive arrangement 5, support 6, upper screen deck 1.5 and lower floor's flexible sieve 2.4.

The main screen frame 1 comprises two side plates 1.1 which are arranged in bilateral symmetry, a plurality of lower-layer fixed beams 1.2 which are identical in structure, a plurality of upper-layer screen plate beams 1.3 which are identical in structure, an upper-layer material receiving plate 1.4a, a lower-layer material receiving plate 1.4b, four supporting heads 1.6 which are identical in structure, two vibration exciter mounting holes 1.7 which are identical in structure and a plurality of floating beam placing windows 1.8 which are identical in size.

The fixed beam 1.2, the upper-layer sieve plate beam 1.3, the upper-layer material receiving plate 1.4a, the lower-layer material receiving plate 1.4b, the upper-layer sieve plate 1.5 and the support head 1.6 are fixedly arranged on the side plate 1.1; the upper-layer sieve plate 1.5 is arranged on the upper part of the upper-layer sieve plate beam 1.3.

Two ends of the upper layer material receiving plate 1.4a and the lower layer material receiving plate 1.4b are fixed on the side plate 1.1 by bolts, the upper layer material receiving plate 1.4a, the lower layer material receiving plate 1.4b and the side plate 1.1 enclose three vertical surfaces (three vertical surfaces in four vertical surfaces, an outlet must be reserved) of a screen frame, the upper layer material receiving plate 1.4a and the lower layer material receiving plate 1.4b are positioned at the head of the vibrating screen according to the material flowing direction, and a coarse discharge port is positioned at the tail of the vibrating screen; the upper-layer sieve plate 1.5 is connected with the upper-layer material receiving plate 1.4a, and the lower-layer flexible sieve plate 2.4 is lapped with the lower-layer material receiving plate 1.4 b; the upper layer receiving plate 1.4a and the lower layer receiving plate 1.4b ensure that the material entering the screen frame can only fall on the screen plate and can not leak out of the screen frame.

The two vibration exciter mounting holes 1.7 with the same structure are respectively arranged at the center of mass of the middle part of the side plate 1.1, and the two vibration exciters 3 with the same structure are arranged in the vibration exciter mounting holes 1.7; the floating beam placing window 1.8 is arranged at the lower part of the side plate 1.1.

The floating screen frame 2 comprises a floating beam 2.1, channel steel 2.2 and a reinforcing plate 2.3; the floating beam 2.1 is arranged in a floating beam placing window 1.8, the floating beam 2.1 is fixedly connected to two piece of channel steel 2.2 which are arranged in bilateral symmetry through bolts, and a reinforcing plate 2.3 is arranged in the middle of the channel steel 2.2; the floating screen frame 2 is a rigid whole, and the floating screen frame 2 is fixedly connected with the main screen frame 1 through a shearing spring 4.

The floating beam 2.1 and the lower layer fixed beam 1.2 are arranged at intervals, the lower layer flexible sieve plate 2.4 is arranged between the lower layer fixed beam 1.2 and the floating beam 2.1, one side of the lower layer flexible sieve plate 2.4 is fixed on the floating beam 2.1, and the other side of the lower layer flexible sieve plate 2.4 is fixed on the lower layer fixed beam 1.2.

The driving device 5 is arranged on the supporting frame on one side of the vibrating screen, and the driving device 5 is connected with the vibration exciter 3 through a coupler. The support 6 is used for supporting and fixing the vibrating screen, and the support 6 comprises a clamping seat 6.1, a damping spring 6.2 and a supporting leg 6.3; the support heads 1.6 are bolted to the side plates 1.1, and the four support heads 1.6 are the supports that support the entire screen frame. The supporting head 1.6 is placed in the clamping seat 6.1 and pressed by a pressing plate and a bolt, and the installation angle can be adjusted by loosening the bolt. The clamping seat 6.1 is placed on the supporting leg 6.3 through the damping spring 6.2. The screening machine stands on the foundation through the four elastic supports; the whole screening machine can vibrate near the balance position, and due to the action of the damping spring 6.2, too large vibration cannot be transmitted to the foundation.

The utility model discloses the problem that exists in the present actual screening has been solved well. The utility model is a composite double-layer structure, which is a complex of a circular vibrating screen and a relaxation screen; the upper-layer sieve plate adopts a traditional fixed sieve plate, and the lower-layer flexible sieve plate adopts a flexible polyurethane sieve plate. The upper-layer sieve plate is used for grading coarse particles which are not easy to block holes, and a wear-resistant durable (cast) polyurethane sieve plate or other fixed sieve plates are adopted to shunt materials with larger particle size fractions from the upper layer, so that the processing capacity is improved; the flexible polyurethane sieve plate adopted by the lower-layer sieve flexible plate utilizes the good self-cleaning capability of the lower-layer sieve flexible plate during relaxation to sieve fine-grained materials efficiently without blocking holes, prolongs the service life of the relaxation sieve plate and well solves the problem of fine-grained sieving.

An eccentric block is fixedly arranged on a vibration exciter mandrel in the vibration exciter, and the driving device transmits a rotating torque to drive the eccentric block to rotate so as to generate an exciting force and enable the whole screen frame to generate circular vibration. The upper layer sieve plate beam and the upper layer sieve plate are fixed on the main sieve frame and do circular vibration together with the main sieve frame, the common circular vibration sieve is the same as the common circular vibration sieve, and the lower layer floating sieve frame is another rigid whole and is elastically connected with the main sieve frame to form another mass body of the sieving machine, so the sieving machine is double-mass vibration.

Because the elastic connection through shear spring between unsteady reel and the main reel, under circular vibration and shear spring dual function, produced relative amplitude between unsteady reel and the main reel, two vibrations of a drive production main reel, unsteady reel, two reels are with the relative vibration of same frequency. The vibrating displacement of the floating beam relative to the lower-layer fixed beam enables the lower-layer flexible sieve plate to generate tensioning and loosening motion (the stretching sieve principle of the machine type), and materials on the sieve plate obtain high acceleration (30-50 times of gravity acceleration) perpendicular to the sieve surface, so that the materials are not easy to block holes and are easier to pass through the sieve.

The utility model discloses an appearance is with double-deck circle sieve appearance of shaking is almost, and drive arrangement gives the vibration exciter with power transmission, and the vibration exciter drives whole screen frame and does the circular vibration. When the material to be screened is fed to the upper material receiving plate, the material moves to the upper sieve plate for screening under the action of circular vibration, the material larger than the sieve mesh is left on the upper sieve plate by the upper sieve plate, and the material moves to an outlet through the inclined sieve plate under the action of circular vibration, so that the large-grain-level material is prevented from falling onto the lower stretching sieve plate, the thickness of the upper material layer of the lower flexible sieve plate is reduced, the load and the abrasion of the lower flexible sieve plate are reduced, the service life of the sieve plate is prolonged, and the handling capacity of the whole machine is improved; meanwhile, due to the material distribution effect of the upper-layer sieve plate, the material distribution on the lower-layer flexible sieve plate is uniform, and the purpose of efficiently sieving the thin material layer is achieved. The utility model discloses in the actual production application, accomplished the task of large treatment capacity, high efficiency, fine grit level screening.

Description of the drawings:

FIG. 1 is a schematic structural view of a high-efficiency composite double-layer vibrating screen of the present invention;

FIG. 2 is a left side view of the structure of FIG. 1;

FIG. 3 is a schematic structural view of the main frame of the present invention;

FIG. 4 is a schematic structural view of the floating frame of the present invention;

fig. 5 is a schematic view of the inner structure of the active screen frame of the present invention cut along the center line;

fig. 6 is a schematic view of the working principle of the middle and lower layer flexible sieve plate of the present invention;

fig. 7 is a schematic structural view of a vibration exciter of the present invention;

fig. 8 is a schematic structural view of a driving device according to the present invention;

fig. 9 is a schematic structural diagram of the middle support of the present invention.

In the figure: 1: a main screen frame; 2: a floating screen frame; 3: a vibration exciter; 4: a shear spring; 5: a drive device; 6: a support; 1.1: a side plate; 1.2: a lower fixed beam; 1.3: an upper deck beam; 1.4 a: an upper receiving plate; 1.4 b: a lower receiving plate; 1.5: an upper layer sieve plate; 1.6: a support head; 1.7: a vibration exciter mounting hole; 1.8: the floating beam is provided with a window; 2.1: a floating beam; 2.2: channel steel; 2.3: a reinforcing plate; 2.4: a lower flexible screen deck; 3.1: a mandrel; 3.2 eccentric block; 3.3: a bearing; 3.4: a bearing cartridge; 3.5: a middle catcher; 3.6: an intermediate shaft; 3.7: a middle shield; 3.8: an inner shield; 3.9: an outer shroud; 5.1: a motor; 5.2: a small belt pulley; 5.3: a belt; 5.4: a belt guard; 5.5: a large belt pulley; 5.6: a transmission shaft seat; 5.7: a drive shaft; 5.8: the transmission supporting leg; 5.9: a coupling; 6.1: a card holder; 6.2: a damping spring; 6.3: and (7) supporting legs.

The specific implementation mode is as follows:

the present invention will be further described with reference to the accompanying drawings.

The utility model discloses a main reel 1, unsteady reel 2, vibration exciter 3, drive arrangement 5, support 6, shearing spring 4, upper screen 1.5 and lower floor's flexible sieve 2.4. The appearance is similar with double-deck circle sieve that shakes, and its biggest difference lies in that the lower floor is the relaxation sieve, the utility model discloses a two plastid shale shakers.

The upper layer is a common fixed sieve plate, the upper sieve plate 1.5 is fixed on the upper sieve plate beam 1.3 and the side plate 1.1, and the upper sieve plate 1.5 and the upper receiving plate 1.4a form the upper layer part. The material to be screened is fed to the joint of the upper material receiving plate 1.4a and the upper screen plate 1.5, and the material moves to the upper screen plate 1.5 for screening under the action of circular vibration. Materials larger than the sieve pores move downwards on the sieve plate along the inclined sieve surface and are discharged from the sieve tail; the materials smaller than the sieve pores of the upper layer sieve plate fall to the lower layer, one part of the materials moves to the lower layer flexible sieve plate 2.4 through the lower layer material receiving plate 1.4b, the majority of the materials directly fall to the lower layer flexible sieve plate 2.4, and the lower layer flexible sieve plate 2.4 is used for sieving with finer particle grade.

The floating beams 2.1 and the lower layer fixed beams 1.2 are arranged at intervals, wherein the first layer, the third layer, the fifth layer and the seventh layer are provided with the lower layer fixed beams, and the second layer, the fourth layer and the sixth layer are provided with the floating beams. The lower flexible screen deck 2.4 is mounted on floating beams 2.1 and lower fixed beams 1.2, as is the case with the flip-flow screen.

The main screen frame is a rigid whole, and is also the main vibrating body of the vibrating screen. When the screen frame is assembled, the side plates 1.1 are erected firstly, then the lower-layer fixed beams 1.2 and the upper-layer screen plate beams 1.3 are installed in a one-to-one correspondence mode, and the main screen frame is a stable frame body. After the frame body is corrected, the upper layer receiving plate 1.4a and the lower layer receiving plate 1.4b are installed.

The second vibrating mass of the present vibrating screen is a floating frame 2. When the floating beam is installed, the floating beam 2.1 is placed in the floating beam placing window 1.8 located on the side plate, and then the floating beam is assembled on the channel steel 2.2 through bolts. All floating beams are fixedly connected to the two channel steels to form a rigid whole, and the channel steels 2.2 of the floating screen frame 2 are fixedly connected with the side plates 1.1 of the main screen frame 1 through the shearing springs 4. The distance between the lower layer fixed beam and the floating beam needs to be adjusted, so that the error of the lower layer fixed beam and the floating beam is less than +/-0.5 mm.

The vibration exciter 3 is arranged in a vibration exciter mounting hole 1.7 on the side plate and is rigidly and tightly connected with the screen frame. The vibration exciter is the heart of the screening machine and is a combination of two vibration exciters which are symmetrically arranged. Each vibration exciter consists of a mandrel 3.1, an eccentric block 3.2, a bearing 3.3, a bearing box 3.4 and a middle catcher 3.5. A vibration exciter is arranged on each side plate 1.1, the two vibration exciters are connected through an intermediate shaft 3.6, a safety shield, two intermediate shields 3.7, two inner shields 3.8 and two outer shields 3.9 are arranged outside the vibration exciters. The spindle 3.1 is connected with the shaft coupling of the driving part. The vibration exciter 3 is arranged at the center of mass of the middle part of the side plate 1.1, the two eccentric blocks form a pair, the included angle is adjustable, and the vibration force of the vibration exciter 3 is adjusted.

The driving device 5 is the same as the circular vibrating screen, and the coupler can be a universal joint coupler and the like in the required occasions. The driving device 5 comprises a motor 5.1, a small belt pulley 5.2, a belt 5.3, a belt shield 5.4, a large belt pulley 5.5, a transmission shaft seat 5.6, a transmission shaft 5.7, a transmission supporting leg 5.8 and a coupling 5.9; the driving device 5 is connected with a mandrel 3.1 of the vibration exciter 3 through a coupling 5.9.

The damping spring 6.2 of the four-piece support of the vibrating screen is a rubber cylindrical spring besides a steel spiral spring; the support legs are 6.3 parts of front support legs and rear support legs, and the height of the support legs is different, so that a proper screen surface inclination angle is realized. The inclination angle of the common sieve surface is 18-22 degrees.

The vibrating screen has two amplitudes, one is the amplitude of the main screen frame, the amplitude is usually 3-4 mm, and the amplitude is mainly regulated and controlled through the size of an exciting force (eccentric mass moment). The other is the relative amplitude of the floating frame relative to the main screen frame, which is usually 5-7 mm. The relative amplitude can be controlled and adjusted through the rigidity of the shear spring, the exciting force and the rotating speed, and the operation parameters of the equipment are further optimized according to the actual screening requirement.

Claims

1. A high-efficiency composite double-layer vibrating screen is characterized by comprising a main screen frame (1), a floating screen frame (2), two vibration exciters (3) with the same structure, a shearing spring (4), a driving device (5), a support (6), an upper screen plate (1.5) and a lower flexible screen plate (2.4); the main screen frame (1) comprises two side plates (1.1) which are arranged in bilateral symmetry, a plurality of lower-layer fixed beams (1.2) with the same structure, a plurality of upper-layer screen plate beams (1.3) with the same structure, an upper-layer material receiving plate (1.4a), a lower-layer material receiving plate (1.4b), four supporting heads (1.6) with the same structure, two vibration exciter mounting holes (1.7) with the same structure and a plurality of floating beam placing windows (1.8) with the same size; the fixed beam (1.2), the upper-layer sieve plate beam (1.3), the upper-layer material receiving plate (1.4a), the lower-layer material receiving plate (1.4b), the upper-layer sieve plate (1.5) and the support head (1.6) are fixedly arranged on the side plate (1.1); the upper-layer sieve plate (1.5) is arranged at the upper part of the upper-layer sieve plate beam (1.3); the two vibration exciter mounting holes (1.7) with the same structure are respectively arranged at the center of mass of the middle part of the side plate (1.1), and the two vibration exciters (3) with the same structure are arranged in the vibration exciter mounting holes (1.7); the floating beam placing window (1.8) is arranged at the lower part of the side plate (1.1); the floating screen frame (2) comprises a floating beam (2.1), channel steel (2.2) and a reinforcing plate (2.3); the floating beam (2.1) is arranged in the floating beam placing window (1.8), the floating beam (2.1) is fixedly connected to the two channel steels (2.2) which are arranged in bilateral symmetry through bolts, and the middle of each channel steel (2.2) is provided with the reinforcing plate (2.3); the floating screen frame (2) is a rigid whole, and the floating screen frame (2) is fixedly connected with the main screen frame (1) through a shearing spring (4); the floating beams (2.1) and the lower-layer fixed beams (1.2) are arranged at intervals, a plurality of lower-layer flexible sieve plates (2.4) are arranged between the lower-layer fixed beams (1.2) and the floating beams (2.1), one side of each lower-layer flexible sieve plate (2.4) is fixed on the corresponding floating beam (2.1), and the other side of each lower-layer flexible sieve plate (2.4) is fixed on the corresponding lower-layer fixed beam (1.2); the driving device (5) is arranged on a supporting frame positioned on one side of the vibrating screen, and the driving device (5) is connected with the vibration exciter (3) through a coupler; the support (6) is used for supporting and fixing the vibrating screen, the support (6) comprises a clamping seat (6.1), a damping spring (6.2) and a supporting leg (6.3), and the supporting head (1.6) is placed in the clamping seat (6.1).

2. The high-efficiency composite double-layer vibrating screen is characterized in that two ends of the upper material receiving plate (1.4a) and the lower material receiving plate (1.4b) are fixed on the side plate (1.1) through bolts, the upper material receiving plate (1.4a) and the lower material receiving plate (1.4b) and the side plate (1.1) enclose three vertical surfaces of a screen frame, according to the material flowing direction, the upper material receiving plate (1.4a) and the lower material receiving plate (1.4b) are positioned at the head of the vibrating screen, and a coarse discharge port is positioned at the tail of the vibrating screen; the upper layer sieve plate (1.5) is connected with the upper layer material receiving plate (1.4a), and the lower layer flexible sieve plate (2.4) is lapped with the lower layer material receiving plate (1.4 b).