CN116571436A - Three-layer vibrating screen - Google Patents

Abstract

The invention discloses a three-layer vibrating screen, which includes a screen frame, a screen body installed in the screen frame, and vibrating screen legs installed on both sides of the screen frame to form an inclined support for the screen frame on the ground, and A vibration device installed on the screen frame to make the screen body vibrate in a straight line. The frame is connected to the screen body. The vibration device includes a front exciter group and a rear exciter group installed on both sides of the frame, and the installation A motor set outside the frame that drives the front vibrator group and the rear vibrator group to rotate. The vibrating device also includes a linkage shaft that connects the front vibrator group and the rear vibrator group opposite to each other. Linkage arms are connected between the front exciter group and the rear exciter group and the screen frame; the three-layer vibrating screen adopts inclined screening and multi-exciter design, which can achieve better vibration screening for multi-layer screen bodies Effect.

Description

Three-layer vibrating screen

technical field

The invention relates to a three-layer vibrating screen.

Background technique

The vibrating screen works by using the reciprocating rotation vibration generated by the vibration of the vibrator. The upper rotating weight of the vibrator causes the screen surface to produce plane circular vibration, while the lower rotating weight causes the screen surface to produce conical rotary vibration. Its vibration track is a complex space curve. The projection of the curve on the horizontal plane is a circle, while the projection on the vertical plane is an ellipse. The vibration amplitude can be changed by adjusting the excitation force of the upper and lower rotating weights. And adjusting the spatial phase angle of the upper and lower weights can change the curve shape of the motion track of the screen surface and change the motion track of the material on the screen surface.

In the existing sand and gravel treatment, double-layer vibrating screens are often used to screen sand and gravel, but when faced with the need for more refined screening, three or even four layers of vibrating screens are also used. The current three-layer vibrating screen is shown in a horizontal screening machine with a frequency converter disclosed in the application number 201521046335.3, which discloses "comprising a screen box, a motor, an electric control cabinet with a frequency converter, The base, the gravity sensing device, the vibration box is arranged on one side of the box body of the screen box, the vibration box is sealed by rubber strips and bolts, and the same three gears are arranged in the vibration box, and the gears mesh with each other , each gear is also provided with a counterweight and a weight hole, the weight is placed in the weight hole, the number of the weight hole is greater than the number of the weight, and it is set on the other side of the screen box and the symmetrical position of the vibration box There is a counterweight box, an electric control cabinet with a frequency converter and a motor interconnected to drive the vibration box to run, and the gravity sensing device is set on the base of the screen box." It can only be sieved from below, and the vibration device is installed on the side of the screen frame, so the vibration effect is poor.

Another example is the dual-drive synchronous eccentricity adjustable exciter vibrating screen disclosed in the application number 202122151158.7, which discloses that "the vibrating screen includes a screen body, a screen, a base, two sets of double eccentric mass exciters and two synchronous The driving motor rotates in reverse, and the left and right sides of the screen body protrude upwards with supporting frames respectively. Two sets of double eccentric exciters are respectively connected to the supporting frames on both sides. The connecting line of the shaft center and the horizontal plane form an included angle of 60 degrees. The two driving motors are respectively connected to the eccentric blocks of the coaxial exciter through universal couplings, and the corresponding eccentric blocks of the two sets of exciters are also connected Connected by a universal coupling, the bottom surface of the sieve body is inclined at an angle of 20 degrees to the plane, the screen mesh is laid on the bottom surface of the sieve body, and the two sides of the sieve body pass through two sets of shock-absorbing springs connected with the base", although this vibrating screen adopts an inclined design, it adopts a single exciter structure, and the motor and the vibrator are installed at the same level, and the motor is easy to form vibration together with the vibrating screen. , and it is difficult for a single exciter structure to form a better vibration effect, and it is difficult to form an effective screening for a multi-layer sieve body.

Contents of the invention

Aiming at the deficiencies in the prior art, the object of the present invention is to provide a three-layer vibrating screen which adopts inclined screening and multi-vibrator design, and can achieve better vibrating screening effect on multi-layer screen bodies.

The technical solution adopted by the present invention to solve its technical problems is:

A three-layer vibrating screen, including a screen frame, a screen body installed in the screen frame, and vibrating screen legs installed on both sides of the screen frame to form an inclined support for the screen frame on the ground, and installed in the screen frame The vibrating device on the screen body forms a linear vibration on the screen body. The frame is connected to the screen body. The vibrating device includes a front exciter group and a rear exciter group installed on both sides of the frame, and a vibrator installed outside the frame. 1. A motor unit that drives the front vibrator group and the rear vibrator group to rotate. The vibrating device also includes a linkage shaft that connects the front vibrator group and the rear vibrator group opposite to each other. The front vibrator A linkage arm is connected between the exciter group and the rear exciter group and the screen frame.

As a preference, both the front exciter group and the rear exciter group are composed of two eccentric blocks forming relative rotation and an outer shell installed outside the eccentric block, and the two eccentric blocks forming relative rotation have a height difference, The outer casing is inclined.

Preferably, a gear linkage is adopted between two eccentric blocks that form relative rotation on the same side.

Preferably, the motor set includes two drive motors with height difference formed, and the two drive motors are respectively connected with the front exciter set and the rear exciter set by belt pulleys.

As a preference, the vibrating screen legs include a ground shock-absorbing seat installed at the bottom of the screen frame, a ground shock-absorbing spring mounted on the ground shock-absorbing seat, connected with the screen frame, and hinged to the ground shock-absorbing seat. Between the screen frame and the connecting arms on both sides of the ground damping spring.

Preferably, the vibrating screen legs also include a sieve body damping seat installed at the top of the screen frame, a sieve body shock absorbing spring installed on the sieve body shock absorbing seat, and connected to the sieve body, and connected to the The sieve body connection seat between the sieve body damping spring and the sieve body.

Preferably, the screen body connecting seat is provided with two groups, and a height difference is formed, and the height difference formed by the two driving motors is consistent with the height difference formed by the screen body connecting seat.

Preferably, the front vibrator group, the rear vibrator group and the linkage arm are all inclined, and the inclined direction formed is opposite to the inclined direction formed by the screen body.

Preferably, the linkage arm is connected to the middle of the sieve body and is located between two sets of sieve body connecting seats. The sieve body has three layers of screens. All are located above the three-layer screen.

The beneficial effects of the present invention are:

Compared with the existing horizontally designed three-layer vibrating screen, this scheme adopts an inclined design to change the screening effect, thereby forming different screening outlets, and based on the design of the three-layer screen body, it is proposed to form one front and one back The double exciter with height difference is used to screen the three-layer screen body. Compared with the existing single-layer or double-layer inclined vibrating screen, the screen force is greater. At the same time, considering the increase in the screen force, it will react to the motor. The force of the vibrating screen will also increase, so the design of an external motor is adopted, and the vibrator is driven by the pulley to perform vibration work, so as to ensure the normal operation of the vibrating screen under the condition of high vibration force.

Description of drawings

Fig. 1 is the side structure schematic diagram of a kind of three-layer vibrating screen of the present invention;

Fig. 2 is a schematic view of the side structure of a screen frame of a kind of three-layer vibrating screen of the present invention;

Fig. 3 is the enlarged schematic view of the vibration device structure of a kind of three-layer vibrating screen of the present invention;

Fig. 4 is the front structure schematic diagram of a kind of three-layer vibrating screen of the present invention;

Fig. 5 is a structural schematic diagram of a motor unit of a three-layer vibrating screen according to the present invention.

Detailed ways

The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention. In the following paragraphs the invention is described more specifically by way of example with reference to the accompanying drawings. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

In describing the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal" etc. indicate an orientation or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two elements.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example

As shown in Figures 1 to 5, a three-layer vibrating screen includes a screen frame 1, a screen body 2 installed in the screen frame 1, and screen frames installed on both sides of the screen frame 1 to ground the screen frame 1. The vibrating screen legs 3 that form an inclined support, and the vibrating device 4 installed on the screen frame 1 to make the sieve body 2 vibrate in a straight line, the sieve body 2 is connected with a frame 5, and the vibrating device 4 includes a 5 the front vibrator group 41 and the rear vibrator group 42 on both sides, and the motor group 43 installed outside the frame 5 to drive the front vibrator group 41 and the rear vibrator group 42 to rotate, the vibrating device 4. It also includes a linkage shaft 44 that connects the front exciter group 41 and the rear exciter group 42 opposite to each other. The front vibrator group 41 and the rear exciter group 42 are connected Link arm 45 is arranged.

In this embodiment, the design of double exciters is adopted, which can greatly improve the vibration force on the screen body 2, so that the sand, gravel, and soil poured into the screen body 2 can be quickly For sieving, it should be noted that due to the inclined and three-layer design of the sieve body 2 used in this scheme, it must quickly sieve the sand and gravel soil, otherwise the sand and gravel soil on the upper screen surface is difficult to enter The lowest layer is difficult to achieve the screening effect, so this scheme uses double exciters to generate a large vibration force on the sieve body 2 at the same time, so as to realize the screening of the three-layer sieve body 2.

The front exciter group 41 and the rear exciter group 42 are all made up of two eccentric masses 6 that form relative rotation, and an outer casing 7 installed outside the eccentric mass 6. The two eccentric masses 6 that form relative rotation have a height Potential difference, the outer casing 7 is inclined.

It should be noted that in this solution, two relatively rotating eccentric masses 6 are used to form a linear vibration force, and the direction of the vibration force formed by the front exciter group 41 and the rear exciter is consistent. Synchronous operation, resulting in greater vibration force.

Gear linkage is adopted between the two eccentric blocks 6 that form relative rotation on the same side, and the motor group 43 includes two drive motors formed with a height difference. Adopt belt pulley to connect between vibrator group 42.

Considering the design of double exciters, the externally designed motor unit 43 is used in this project to provide the power source through the linkage structure of the pulley. This linkage method can well isolate the screen body 2 from the motor unit 43. Active force, thereby greatly improving the service life of the motor unit 43.

The vibrating screen leg 3 includes a ground damping seat 31 mounted on the bottom of the screen frame 1, a ground shock absorbing spring 32 mounted on the ground shock absorbing seat 31, connected with the screen frame 1, and hinged on the ground. Between the shock absorbing seat 31 and the screen frame 1, the connecting arms 33 located on both sides of the ground shock absorbing spring 32, the vibrating screen leg 3 also includes a screen body shock absorbing seat 34 installed on the top of the screen frame 1, and The sieve body damping spring 35 that is installed on the sieve body damping seat 34 and is connected with the sieve body 2, and the sieve body connecting seat 36 that is connected between the sieve body damping spring 35 and the sieve body 2, the sieve body Two groups of connecting seats 36 are provided, and a height difference is formed, and the height difference formed by the two drive motors is consistent with the height difference formed by the screen body connecting seats 36 .

In this scheme, the ground damping structure used belongs to the existing conventional technical means, the main purpose is to make the entire screen frame 1 horizontally supported on the ground position, similarly, the adopted screen body 2 damping structure also belongs to the existing conventional The main purpose of the technical means is to make the entire screen body 2 obliquely supported on the screen frame 1. In addition, the purpose of the height difference formed by the two drive motors is to make the screen body 2 obliquely support.

The front exciter set 41 , the rear exciter set 42 and the linkage arm 45 are all inclined, and the inclined direction formed is opposite to the inclined direction formed by the sieve body 2 .

It should be noted that the vibration force generated in this solution is not the vibration force in the vertical direction, but the vibration force opposite to the inclination direction of the screen body 2, so that the screen body 2 can form up and down vibration when it is tilted.

The linkage arm 45 is connected to the middle of the screen body 2, and is located between two groups of screen body connecting seats 36. The screen body 2 has three layers of screens, the front exciter group 41 and the rear exciter group 42 And linkage shaft 44 all are positioned at the top of three-layer screen cloth.

In this embodiment, the design of the three-layer screen is adopted, of course, it can also be added as a four-layer screen, and the setting of the exciter can be increased at the same time, but the inclination angle of the screen needs to be reduced, and the three-layer screen generally The inclination angle of 40° is used, and the inclination angle of four layers of screens needs to be within 30°. Of course, generally speaking, three layers of screens will form four outlets, so three layers of screens can meet the requirements of most gravel. screening requirements.

The beneficial effects of the present invention are:

Compared with the existing horizontally designed three-layer vibrating screen, this scheme adopts an inclined design to change the screening effect, thereby forming different screening outlets, and based on the design of the three-layer screen body, it is proposed to form one front and one back The double exciter with height difference is used to screen the three-layer screen body. Compared with the existing single-layer or double-layer inclined vibrating screen, the screen force is greater. At the same time, considering the increase in the screen force, it will react to the motor. The force of the vibrating screen will also increase, so the design of an external motor is adopted, and the vibrator is driven by the pulley to perform vibration work, so as to ensure the normal operation of the vibrating screen under the condition of high vibration force.

The above-mentioned embodiments of the present invention do not limit the protection scope of the present invention. Under the premise of the above-mentioned basic technical ideas, other modifications, replacements or changes made to the above-mentioned structure of the present invention in various forms shall fall within the protection scope of the present invention.

Claims (9)

1. The three-layer vibrating screen comprises a screen frame, a screen body arranged in the screen frame, vibrating screen supporting legs arranged on two sides of the screen frame and used for forming inclined support on the ground, and a vibrating device arranged on the screen frame and used for enabling the screen body to linearly vibrate, and is characterized in that: the screen body is connected with a frame, the vibrating device comprises a front vibration exciter set and a rear vibration exciter set which are arranged on two sides of the frame, and a motor set which is arranged outside the frame and drives the front vibration exciter set and the rear vibration exciter set to rotate, the vibrating device also comprises a linkage shaft which is used for connecting the front vibration exciter set and the rear vibration exciter set which are opposite on two sides, and a linkage arm is connected between the front vibration exciter set and the rear vibration exciter set and the screen frame.

2. The three-layer vibrating screen of claim 1, wherein: the front vibration exciter set and the rear vibration exciter set are composed of two eccentric blocks forming relative rotation and an outer shell body arranged outside the eccentric blocks, wherein the two eccentric blocks forming relative rotation have high-low level differences, and the outer shell body is obliquely arranged.

3. The three-layer vibrating screen of claim 2, wherein: the frame is internally provided with a rotating shaft for connecting the vibration exciter groups at two sides, and two eccentric blocks which are positioned at the same side and form relative rotation are in gear linkage.

4. A three-layer vibrating screen according to any of claims 1-3, characterized in that: the motor group comprises two driving motors with high and low level differences, and the two driving motors are respectively connected with the front vibration exciter group and the rear vibration exciter group by belt pulleys.

5. The three-layer vibrating screen as recited in claim 4, wherein: the vibrating screen support leg comprises a ground damping seat arranged at the bottom of the screen frame, a ground damping spring arranged on the ground damping seat and connected with the screen frame, and connecting arms hinged between the ground damping seat and the screen frame and positioned on two sides of the ground damping spring.

6. The three-layer vibrating screen as recited in claim 5, wherein: the vibrating screen support leg further comprises a screen body damping seat arranged at the top of the screen frame, a screen body damping spring arranged on the screen body damping seat and connected with the screen body, and a screen body connecting seat connected between the screen body damping spring and the screen body.

7. The three-layer vibrating screen as recited in claim 6, wherein: the screen body connecting seat is provided with two groups of high-low level differences, and the high-low level differences formed by the two driving motors are consistent with the high-low level differences formed by the screen body connecting seat.

8. The three-layer vibrating screen of any of claims 1-7, wherein: the front vibration exciter group, the rear vibration exciter group and the linkage arm are all obliquely arranged, and the formed oblique direction is opposite to the oblique direction formed by the screen body.

9. The three-layer vibrating screen of claim 8, wherein: the linkage arm is connected to the middle position of the screen body and is positioned between the two groups of screen body connecting seats, the screen body is provided with three layers of screens, and the front vibration exciter group, the rear vibration exciter group and the linkage arm are all positioned above the three layers of screens.