CN113731795B - Vibrating screen - Google Patents

Abstract

The application discloses a vibrating screen, which belongs to the field of mechanical equipment and solves the problems of high labor cost and unreliable pressing of the screen mesh of the vibrating screen. Including screen box, screen tensioning mechanism, screen support and screen pressing mechanism. A screen mesh inlet is provided on the first side of the screen box. The screen mesh holder is arranged in the inner cavity of the screen box and its two sides parallel to the feeding direction of the screen mesh are respectively fixed with the second side and the third side of the screen box, and the second side and the third side are adjacent to the first side. . The position of the screen inlet end of the screen supporter corresponds to the screen inlet. The screen pressing mechanism is arranged above the screen holder, and its two sides are respectively arranged on the second side and the third side of the screen box. Provides a hold down force. The screen tensioning mechanism is arranged at the end of the screen support, and is used for pressing the end of the screen corresponding to the end after the screen is laid on the placement surface of the screen support. The application has low labor cost and good pressing effect.

Description

a vibrating screen

technical field

The present application relates to the technical field of mechanical equipment, and in particular, to a vibrating screen.

Background technique

The vibrating screen uses the principle of vibrating motor excitation, so that the material is thrown up on the screen surface, and at the same time moves forward in a straight line to achieve the purpose of screening. The screening efficiency of the vibrating screen is high, and it is widely used. In the chemical, metallurgical and food industries.

In actual use, after the screen mesh of the existing vibrating screen is replaced, the fixation and compression of the screen mesh are mainly realized by hook plates, wooden wedges, bolts, etc. The whole operation process is cumbersome and difficult, resulting in high labor costs. And the screen is easy to loosen, which will affect the screening efficiency and even shorten the service life of the screen.

SUMMARY OF THE INVENTION

By providing a vibrating screen, the embodiments of the present application solve the problems of high pressing labor cost and unreliable pressing of the screen mesh of the existing vibrating screen.

The embodiment of the present invention provides a vibrating screen, the vibrating screen includes a screen box, a screen tensioning mechanism, a screen support and a screen pressing mechanism; a screen inlet is provided on the first side of the screen box; The screen holder is arranged in the inner cavity of the screen box, and its two sides parallel to the screen feeding direction are respectively fixed with the second side and the third side of the screen box, and the second side and the The third side is adjacent to the first side; the position of the screen inlet end of the screen support is corresponding to the screen inlet; the screen pressing mechanism is arranged on the screen support. Above, and its two sides are respectively arranged on the second side and the third side of the screen box, for when the screen is laid on the placement surface of the screen holder, the screen is provided with a lower surface. The pressing force of pressing; the screen tensioning mechanism is arranged at the end of the screen support, and is used for pressing the corresponding end of the screen after the screen is laid on the placement surface of the screen support. the ends of the screen.

In a possible implementation, the screen tensioning mechanism includes a transmission mechanism, a first rubber roller, a second rubber roller, a third rubber roller, a first gear, a second gear, a third gear and a fourth gear The transmission mechanism is arranged on the fourth side of the screen box; the first rubber roller, the second rubber roller and the third rubber roller are all arranged in the inner cavity of the screen box, and all the The highest part of the second rubber roller is parallel to the placement surface of the screen holder; the rotating shaft of the first rubber roller is fixed with the driven end of the transmission mechanism after passing through the second side surface; A gear is sleeved on the rotating shaft of the first rubber roller; the second gear is located below the first gear and meshes with the first gear, and is sleeved on one end of the rotating shaft of the second rubber roller ; the third gear is sleeved on the other end of the rotating shaft of the second rubber roller; the two ends of the rotating shaft of the second rubber roller are respectively connected to the second side and the third side in rotation; the fourth The gear meshes with the third gear and is located above the third gear; the fourth gear is sleeved on the rotating shaft of the third rubber roller, and the rotating shaft of the third rubber roller is rotatably connected to the the third side; the first rubber roller and the third rubber roller are coaxially arranged and have the same shape; the first rubber roller, the second rubber roller and the third rubber roller can press the screen The end of the net tray corresponds to the end of the screen.

In a possible implementation, the transmission mechanism includes a first sprocket, a second sprocket, a chain and a motor; the motor is arranged on the fourth side surface; the first sprocket is sleeved on the The rotating shaft of the motor, the second sprocket is sleeved on the rotating shaft of the first rubber roller; the chain is sleeved on the first sprocket and the second sprocket at the same time.

In a possible implementation manner, the screen pressing mechanism includes a quadrilateral link structure, a telescopic structure, a linkage pressing plate, a guide plate, an elastic element and an eccentric wheel set; the inner cavity of the screen box is fed along the screen. Two groups of the eccentric wheel groups are arranged in the direction, and the two groups of the eccentric wheel groups are respectively arranged on the second side and the third side; one is respectively provided on the second side and the third side The quadrilateral connecting rod structure is located in the outer cavity of the screen box and is connected with the corresponding eccentric wheel set; a telescopic structure is provided at the corresponding position of each quadrilateral connecting rod structure , the fixed end of the telescopic structure is arranged on the second side or the third side, and the telescopic end is hinged with the hinge seat on the upper surface of the quadrilateral link structure; the four corners of the screen support are respectively arranged One of the guide plates, and the guide plates are fixed with the support plate of the screen support; the elastic element is arranged between each of the guide plates and the linked pressure plate, so that the linked pressure plate and the The eccentric set is always tangent.

In a possible implementation manner, the quadrilateral link structure includes a base plate, a plurality of connecting rods and a plurality of rotating shafts; one end of the plurality of connecting rods is hinged on the base plate, and the other ends are both connected with one of the rotating shafts Hinged; the other end of the rotating shaft is connected with the eccentric wheel set.

In a possible implementation manner, the telescopic structure includes an oil cylinder; the fixed end of the oil cylinder is disposed on the second side or the third side at a corresponding position, and the telescopic end is connected to the upper part of the quadrilateral connecting rod structure. The hinged seat on the surface is hinged.

In a possible implementation, the elastic element includes a compression spring.

In a possible implementation, the vibrating screen further includes a vertical rod; one end of the vertical rod is movably arranged in the mounting hole on the guide plate, and the other end passes through the guide plate and is connected to the linkage pressure plate .

In a possible implementation, the vibrating screen further includes a boss and a groove; the groove is provided below each guide plate, and the groove is provided on the placement surface of the screen support The boss is arranged on the bottom surface of the linkage pressing plate and corresponds to the position of the groove.

In a possible implementation manner, the vibrating screen further includes a plurality of ball screws; a plurality of the ball screws are arranged in a rectangular array on the placement surface of the screen support, and the steel balls of the ball screws are close to each other. the screen.

One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

An embodiment of the present invention provides a vibrating screen, the vibrating screen includes a screen box, a screen tensioning mechanism, a screen support and a screen pressing mechanism. A screen mesh inlet is provided on the first side of the screen box. The screen mesh holder is arranged in the inner cavity of the screen box and its two sides parallel to the screen feeding direction are respectively fixed with the second side and the third side of the screen box, and the second side and the third side are adjacent to the first side. . The position of the screen inlet end of the screen supporter corresponds to the screen inlet. The screen pressing mechanism is arranged above the screen holder, and its two sides are respectively arranged on the second side and the third side of the screen box. Provides a hold down force. The screen mesh tensioning mechanism is arranged at the end of the screen mesh support, and is used for pressing the end of the screen mesh corresponding to the end after the screen mesh is laid on the placement surface of the screen mesh support. In practical applications, the screen mesh enters the screen box from the screen mesh inlet and is laid on the placement surface of the screen mesh support. When the screen mesh reaches the designated position, the screen mesh tensioning mechanism starts to work to compress the end of the screen mesh to prevent Tension the screen. Then the screen pressing mechanism starts to work to press the screen to prevent the screen from loosening. The vibrating screen of the embodiment of the present application does not require manual operation when compressing the screen, has a high degree of automation, and reduces labor costs. In addition, the screen is not easy to loosen, which improves the screening efficiency and prolongs the service life of the screen.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is a schematic structural diagram one of a vibrating screen provided by an embodiment of the application;

Fig. 2 is the structural representation two of the vibrating screen provided by the embodiment of the application;

3 is a schematic structural diagram three of the vibrating screen provided by the embodiment of the application;

4 is a schematic structural diagram 1 of a screen tensioning mechanism provided in an embodiment of the present application;

FIG. 5 is a second structural schematic diagram of the screen tensioning mechanism provided by the embodiment of the application;

6 is a schematic structural diagram of a quadrilateral connecting rod structure provided by an embodiment of the present application;

Fig. 7 is a partial enlarged view one of Fig. 2;

FIG. 8 is a partial enlarged view 2 of FIG. 2 .

Icon: 1-screen box; 11-first side; 111-screen inlet; 12-second side; 13-third side; 14-fourth side; 2-screen tensioning mechanism; 21-transmission mechanism; 211-first sprocket; 212-second sprocket; 213-chain; 214-motor; 22-first rubber roller; 23-second rubber roller; 24-third rubber roller; 25-first gear; 26 -Second gear; 27-Third gear; 28-Fourth gear; 3-Screen support; 31-Support plate; 4-Bearing; 5-Screen pressing mechanism; Base plate; 512- connecting rod; 513- shaft; 52- telescopic structure; 53- linkage pressure plate; 54- guide plate; 55- elastic element; 56- eccentric wheel set; 6- ball screw; 7- vertical rod; 8- Boss; 9-groove.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by ” etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, It is constructed and operated in a particular orientation and is therefore not to be construed as a limitation of the present invention. The terms "first", "second", "third", and "fourth" are used for descriptive purposes only and should not be construed to indicate or imply relative importance. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be It is directly connected, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present invention according to specific situations.

As shown in FIGS. 1 to 8 , an embodiment of the present invention provides a vibrating screen, which includes a screen box 1 , a screen tensioning mechanism 2 , a screen support 3 and a screen pressing mechanism 5 . The screen mesh holder 3 is used to place the screen mesh during the screen mesh replacement process, so as to avoid the screen mesh from falling.

Continuing to refer to FIG. 2 , the first side surface 11 of the screen box 1 is provided with a screen mesh inlet 111 . In practical applications, the height of the screen mesh inlet 111 is set low, so that when the screen mesh enters the screen box 1, the screen mesh inlet 111 can play a flattening effect on the screen mesh, making the screen mesh more flat, and the screen mesh mesh. The placement surface of the holder 3 can fit better.

In practical application, the screen mesh holder 3 is arranged in the inner cavity of the screen box 1 and its two sides parallel to the feeding direction of the screen mesh are respectively fixed with the second side 12 and the third side 13 of the screen box 1. The second side 12 and the third side 13 are adjacent to the first side 11 . The position of the screen inlet end of the screen support 3 corresponds to the screen inlet 111 . The screen pressing mechanism 5 is arranged above the screen holder 3, and its two sides are respectively arranged on the second side 12 and the third side 13 of the screen box 1, for laying the screen on the placement surface of the screen holder 3. After the screen is installed, a pressing force is provided to the screen to press down. In the process of screening materials, the screen will vibrate continuously due to the excitation of the motor. Therefore, after the replacement of the screen is completed, the screen needs to be pressed tightly to avoid the screen being loosened due to continuous vibration during the working process. The mesh pressing mechanism 5 can compress the screen, avoid the loosening of the screen, ensure the screening efficiency of the screen, and further prolong the service life of the screen.

Specifically, the screen tensioning mechanism 2 is provided at the end of the screen support 3 for pressing the end of the screen corresponding to the end after the screen is laid on the placement surface of the screen support 3 . In practical applications, the screen tensioning mechanism 2 can compress the end of the screen corresponding to the end of the screen support 3, so as to avoid the screen from loosening due to the uncompressed end of the screen, and improve the screen quality of the screen. Separating efficiency, extending the service life of the screen, thereby reducing the cost of use.

The embodiment of the present invention provides a vibrating screen, the vibrating screen includes a screen box 1 , a screen mesh tensioning mechanism 2 , a screen mesh support 3 and a screen mesh pressing mechanism 5 . A screen inlet 111 is provided on the first side 11 of the screen box 1 . The screen mesh holder 3 is arranged in the inner cavity of the screen box 1 and its two sides parallel to the screen feeding direction are respectively fixed with the second side 12 and the third side 13 of the screen box 1. The second side 12 and the third side 13 is adjacent to the first side surface 11 . The position of the screen inlet end of the screen support 3 corresponds to the screen inlet 111 . The screen pressing mechanism 5 is arranged above the screen holder 3, and its two sides are respectively arranged on the second side 12 and the third side 13 of the screen box 1, for laying the screen on the placement surface of the screen holder 3. After the screen is installed, a pressing force is provided to the screen to press down. The screen tensioning mechanism 2 is arranged at the end of the screen support 3, and is used for pressing the end of the screen corresponding to the end after the screen is laid on the placement surface of the screen support 3. In practical application, the screen mesh enters the screen box 1 from the screen mesh inlet 111 and is laid on the placement surface of the screen mesh support 3. When the screen mesh reaches the designated position, the screen mesh tensioning mechanism 2 starts to work to tighten the end of the screen mesh. Press down to tension the screen. Then the screen pressing mechanism 5 starts to work to press the screen to prevent the screen from loosening. The vibrating screen of the embodiment of the present application does not require manual operation when compressing the screen, has a high degree of automation, and reduces labor costs. In addition, the screen is not easy to loosen, which improves the screening efficiency and prolongs the service life of the screen.

In practical application, the screen tensioning mechanism 2 includes a transmission mechanism 21, a first rubber roller 22, a second rubber roller 23, a third rubber roller 24, a first gear 25, a second gear 26, a third gear 27 and a first Four gears 28.

Continuing to refer to FIG. 1 , the transmission mechanism 21 is arranged on the fourth side surface 14 of the screen box 1 . The first rubber roller 22 , the second rubber roller 23 and the third rubber roller 24 are all arranged in the inner cavity of the screen box 1 , and the highest point of the second rubber roller 23 is parallel to the placement surface of the screen support 3 . Since the screen mesh will enter the gap between the first rubber roller 22 , the second rubber roller 23 and the third rubber roller 24 from the placement surface of the screen mesh holder 3 during the advancing process, the highest height of the second rubber roller 23 is When the screen mesh is placed parallel to the placement surface of the screen mesh holder 3, the screen mesh can enter the gap between the first rubber roller 22, the second rubber roller 23 and the third rubber roller 24 more smoothly and be compressed. When the second rubber roller When the highest point of 23 is higher than the placement surface of the screen support 3, the screen is not easy to enter the gap between the first rubber roller 22, the second rubber roller 23 and the third rubber roller 24, which increases the difficulty of pressing the screen. .

Specifically, the rotating shaft of the first rubber roller 22 is fixed to the driven end of the transmission mechanism 21 after passing through the second side surface 12 . The first gear 25 is sleeved on the rotating shaft of the first rubber roller 22 . The second gear 26 is located below the first gear 25 and meshes with the first gear 25 , and is sleeved on one end of the rotating shaft of the second rubber roller 23 . The third gear 27 is sleeved on the other end of the rotating shaft of the second rubber roller 23 ; the two ends of the rotating shaft of the second rubber roller 23 are rotatably connected to the second side 12 and the third side 13 respectively. The fourth gear 28 meshes with the third gear 27 and is located above the third gear 27 . The fourth gear 28 is sleeved on the rotating shaft of the third rubber roller 24 , and the rotating shaft of the third rubber roller 24 is rotatably connected to the third side surface 13 . The first rubber roller 22 and the third rubber roller 24 are arranged coaxially and have the same shape. The first rubber roller 22 , the second rubber roller 23 and the third rubber roller 24 can press the ends of the screen meshes corresponding to the ends of the mesh mesh support 3 .

In practical application, since the rotating shaft of the first rubber roller 22 is fixed with the driven end of the transmission mechanism 21 , when the transmission mechanism 21 rotates, it will drive the first rubber roller 22 to rotate, and the first gear 25 is sleeved on the first rubber roller 22 Therefore, when the first rubber roller 22 rotates, it will drive the first gear 25 to rotate, the first gear 25 rotates to drive the second gear 26 to rotate, the second gear 26 rotates to drive the second rubber roller 23 to rotate, and the second rubber roller 23 rotates The third gear 27 is driven to rotate, the third gear 27 drives the fourth gear 28 to rotate, and the rotation of the fourth gear 28 drives the third rubber roller 24 to rotate, so that the first rubber roller 22, the second rubber roller 23 and the third rubber roller 24 can rotate. Simultaneously rotate and squeeze the screen. When the screen replacement is completed and needs to be pressed, the end of the screen corresponding to the end of the screen support 3 will be pressed by the first rubber roller 22, the second rubber roller 23 and the third rubber roller 24 to advance to a proper position, and then The transmission mechanism 21 stops moving, and the first rubber roller 22, the second rubber roller 23 and the third rubber roller 24 press the end of the screen to ensure that the screen will not loosen during the working process and improve the screen quality of the screen. Separating efficiency, extending the service life of the screen, thereby reducing the cost of use.

Continuing to refer to FIG. 4 , the transmission mechanism 21 includes a first sprocket 211 , a second sprocket 212 , a chain 213 and a motor 214 . The motor 214 is disposed on the fourth side surface 14 . The first sprocket 211 is sleeved on the rotating shaft of the motor 214 , and the second sprocket 212 is sleeved on the rotating shaft of the first rubber roller 22 . The chain 213 is sleeved on the first sprocket 211 and the second sprocket 212 at the same time. When the screen is replaced and needs to be pressed, the motor 214 rotates in the forward direction to drive the first sprocket 211 to rotate, and the first sprocket 211 rotates to drive the second sprocket 212 to rotate, thereby driving the first rubber roller 22 to rotate. The rotation of 22 drives the first gear 25 to rotate, the rotation of the first gear 25 drives the rotation of the second gear 26, the rotation of the second gear 26 drives the rotation of the second rubber roller 23, the rotation of the second rubber roller 23 drives the rotation of the third gear 27, the rotation of the third gear The rotation of 27 drives the fourth gear 28 to rotate, and the rotation of the fourth gear 28 drives the rotation of the third rubber roller 24, thereby realizing the simultaneous rotation of the first rubber roller 22, the second rubber roller 23 and the third rubber roller 24, so that the first rubber roller The roller 22, the second rubber roller 23 and the third rubber roller 24 squeeze the screen at the same time, so that the screen moves to the proper position, then the motor 214 stops working, the first rubber roller 22, the second rubber roller 23 and the third rubber roller The roller 24 compresses the end of the screen to ensure that the screen will not loosen during the working process, thereby improving the screening efficiency of the screen and prolonging the service life of the screen. When the screen mesh needs to be recovered, it can be realized by reversing the motor 214. The whole operation process is simple, does not require manual operation, is simple and fast, reduces labor costs, and improves work efficiency. Of course, the transmission mechanism 21 may also include a first pulley, a second pulley, a belt and a motor 214 . The motor 214 is disposed on the fourth side surface 14 . The first pulley is sleeved on the rotating shaft of the motor 214 , and the second pulley is sleeved on the rotating shaft of the first rubber roller 22 . The belt is sleeved on the first pulley and the second pulley at the same time.

In practical application, the screen pressing mechanism 5 includes a quadrilateral link structure 51 , a telescopic structure 52 , a linkage pressing plate 53 , a guide plate 54 , an elastic element 55 and an eccentric wheel set 56 . In practical applications, the linkage pressing plate 53 adopts an integral structure, which can improve the pressing effect of the linkage pressing plate 53, ensure that the screen mesh does not loosen and curl during the working process, further prolong the practical life of the screen mesh, and improve the screen mesh. sieving efficiency.

Specifically, the inner cavity of the screen box 1 is provided with two sets of eccentric wheel sets 56 along the screen feeding direction, and the two sets of eccentric wheel sets 56 are respectively disposed on the second side 12 and the third side 13 . A quadrilateral connecting rod structure 51 is respectively disposed on the second side 12 and the third side 13 . The quadrilateral connecting rod structure 51 is located in the outer cavity of the screen box 1 and is connected with its corresponding eccentric wheel group 56 . As shown in FIG. 3 , the quadrilateral connecting rod structure 51 is connected with the eccentric wheel set 56 through the bearing 4 clamped on the side wall of the screen holder 3 . The arrangement of the bearing 4 can reduce the friction coefficient during the rotation of the quadrilateral connecting rod structure 51 , improve the service life of the quadrilateral connecting rod structure 51 , and improve the accuracy of the entire device.

Further, a telescopic structure 52 is provided at a corresponding position of each quadrilateral link structure 51 , the fixed end of the telescopic structure 52 is arranged on the second side 12 or the third side 13 , and the telescopic end is connected to the upper surface of the quadrilateral link structure 51 . The hinged seat is hinged. A guide plate 54 is respectively provided at the four corners of the screen mesh holder 3 , and the guide plate 54 is fixed with the support plate 31 of the screen mesh holder 3 . An elastic element 55 is provided between each guide plate 54 and the linkage pressing plate 53 , so that the linkage pressing plate 53 and the eccentric wheel set 56 are always tangential. As shown in FIG. 7 , one end of the elastic element 55 is connected to the guide plate 54 , and the other end is connected to the linkage pressing plate 53 . In addition, each guide plate 54 is provided with a mounting hole, and the mounting hole extends in the direction perpendicular to the movement of the screen.

When the screen mesh needs to be compressed, the telescopic structure 52 is controlled by a control system. Specifically, the control system may be a remote controller, a computer program, etc., which is not limited in this embodiment. The extension of the telescopic structure 52 drives the quadrilateral link structure 51 to move downward, thereby driving the eccentric wheel group 56 to press down the linkage pressing plate 53, so that the linkage pressing plate 53 presses the screen mesh. When the screen mesh needs to be loosened, the telescopic structure 52 is controlled by the control system, the telescopic structure 52 shortens and drives the quadrilateral link structure 51 to move upward, thereby driving the eccentric wheel set 56 to move upward, and the linkage pressure plate 53 follows the eccentricity under the pulling force of the elastic element 55. The wheel set 56 is moved upwards to relax the screen. The compressing and loosening process of the screen does not require manual operation, the degree of automation is high, the labor cost is reduced, and the compressing and loosening speed is fast, which saves working time and improves working efficiency.

Continuing to refer to FIG. 6 , the quadrilateral link structure 51 includes a base plate 511 , a plurality of links 512 and a plurality of rotating shafts 513 . One end of the plurality of connecting rods 512 is hinged on the base plate 511 , and the other ends are hinged with a rotating shaft 513 . The other end of the rotating shaft 513 is connected to the eccentric wheel set 56 . Specifically, the quadrilateral connecting rod structure 51 includes five connecting rods 512, one end of the five connecting rods 512 is hinged on the base plate 511, and the other ends are hinged with a rotating shaft 513, and the other end of the rotating shaft 513 is clamped on the screen mesh support The bearing 4 on the side wall of 3 is connected to the eccentric wheel set 56 . The arrangement of the bearing 4 can reduce the friction coefficient during the rotation of the rotating shaft 513, increase the service life of the rotating shaft 513, and improve the precision of the entire device. Of course, the connecting rods 512 can also be set to two, three, etc. In comparison, when five connecting rods 512 are set, the pressing force of the eccentric wheel group 56 on the linkage pressing plate 53 is larger, and the pressing force is distributed more evenly , can achieve better compression effect. In addition, since the other end of the rotating shaft 513 is connected to the eccentric wheel set 56, when the quadrilateral link structure 51 moves, it can drive the eccentric wheel set 56 to move, and then the eccentric wheel set 56 can press down the linkage pressure plate 53, so that the linkage pressure plate 53 Able to compress the screen.

Specifically, the telescopic structure 52 includes an oil cylinder. The fixed end of the oil cylinder is arranged on the second side 12 or the third side 13 at the corresponding position, and the telescopic end is hinged with the hinge seat on the upper surface of the quadrilateral link structure 51 . In practical applications, when the screen is replaced and the screen needs to be pressed, the oil cylinder is controlled by the control mechanism, and the telescopic end of the oil cylinder is extended, thereby driving the quadrilateral connecting rod structure 51 to press down, and then driving the eccentric wheel group 56 to press down the linkage Pressing plate 53, so that the linkage pressing plate 53 presses the screen. When the screen needs to be loosened, the oil cylinder is controlled by the control mechanism, and the telescopic end of the oil cylinder is shortened, which drives the quadrilateral connecting rod structure 51 to move upward, thereby driving the eccentric wheel group 56 to move upward, and the linkage pressure plate 53 follows the eccentricity under the pulling force of the elastic element 55. The wheel set 56 moves upwards, thereby realizing the relaxation of the screen. Of course, the telescopic structure 52 can also be an electric push rod or a pneumatic cylinder, the fixed end of the electric push rod or the pneumatic cylinder is arranged on the second side 12 or the third side 13 at the corresponding position, and the telescopic end is connected to the upper surface of the quadrilateral link structure 51 hinged on the hinged seat.

In practice, the elastic element 55 comprises a compression spring. Specifically, one end of the compression spring is connected to the guide plate 54 , and the other end is connected to the linkage pressure plate 53 . Of course, the elastic element 55 can also be a coil spring or a rubber spring. One end of the coil spring or rubber spring is connected to the guide plate 54 , and the other end is connected to the linkage pressure plate 53 . In comparison, the cost of compression springs is relatively low, while compression spring materials are readily available.

Specifically, the vibrating screen also includes a vertical rod 7 . One end of the vertical rod 7 is movably arranged in the installation hole on the guide plate 54 , and the other end passes through the guide plate 54 and is connected to the linkage pressing plate 53 . The vertical rod 7 can ensure that the linkage pressing plate 53 keeps moving in the vertical direction when compressing and loosening the screen mesh, and can play a guiding and positioning role, ensuring that the linkage pressing plate 53 can still maintain the original position after multiple up and down movements. , so that the linkage pressing plate 53 can always press the screen.

Continuing to refer to FIG. 8 , the vibrating screen further includes a boss 8 and a groove 9 . A groove 9 is provided below each guide plate 54 , and the groove 9 is provided on the placement surface of the screen holder 3 . The boss 8 is arranged on the bottom surface of the linkage pressing plate 53 and corresponds to the position of the groove 9 . In practical application, when the linkage pressing plate 53 moves in the direction close to the screen to press the screen, the boss 8 arranged on the bottom surface of the linkage pressing plate 53 will move with the linkage pressing plate 53. When the linkage pressing plate 53 presses the screen, The boss 8 will also press the screen and snap into the groove 9, so that the screen is not easy to come out during the screening process, which improves the pressing effect of the screen and increases the pressure when the linkage pressing plate 53 presses the screen. reliability.

In practical applications, the vibrating screen also includes a plurality of ball screws 6 . A plurality of ball screws 6 are arranged in a rectangular array on the placement surface of the screen mesh holder 3, and the steel balls of the ball screws 6 are close to the screen mesh. As shown in FIG. 7 , the ball screws 6 are respectively installed on the placement surface of the screen mesh holder 3 according to a rectangular array of 6 rows by 37 columns, so as to realize the fixation of the screen mesh holder 3. In addition, the beads on the ball screw 6 The steel balls can reduce the contact area between the placement surface of the screen holder 3 and the screen, thereby reducing the friction during the movement of the screen, thereby reducing the time required for screen replacement and improving the screen replacement efficiency.

Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from other embodiments.

The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still The technical solutions are modified, or some or all of the technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims (9)

1. A vibrating screen is characterized by comprising a screen box (1), a screen tensioning mechanism (2), a screen net support (3) and a screen pressing mechanism (5);

a screen inlet (111) is arranged on the first side surface (11) of the screen box (1);

the screen mesh support (3) is arranged in an inner cavity of the screen box (1), two sides of the screen mesh support parallel to the screen mesh feeding direction are respectively fixed with a second side surface (12) and a third side surface (13) of the screen box (1), and the second side surface (12) and the third side surface (13) are adjacent to the first side surface (11); the position of the screen inlet end of the screen mesh support (3) corresponds to the screen inlet (111);

the screen mesh pressing mechanism (5) is arranged above the screen mesh support (3), and two sides of the screen mesh pressing mechanism are respectively arranged on the second side surface (12) and the third side surface (13) of the screen box (1) and used for providing pressing force for pressing down the screen mesh after the screen mesh is laid on the placing surface of the screen mesh support (3);

the screen tensioning mechanism (2) is arranged at the tail end of the screen support (3) and is used for pressing the end part of the screen corresponding to the tail end after the screen is laid on the placing surface of the screen support (3);

the screen mesh pressing mechanism (5) comprises a quadrilateral connecting rod structure (51), a telescopic structure (52), a linkage pressing plate (53), a guide plate (54), an elastic element (55) and an eccentric wheel set (56);

two groups of eccentric wheel sets (56) are arranged in the inner cavity of the screen box (1) along the feeding direction of the screen mesh, and the two groups of eccentric wheel sets (56) are respectively arranged on the second side surface (12) and the third side surface (13); the second side surface (12) and the third side surface (13) are respectively provided with one quadrilateral connecting rod structure (51), and the quadrilateral connecting rod structure (51) is positioned at the outer cavity of the screen box (1) and is connected with the corresponding eccentric wheel set (56);

the telescopic structure (52) is arranged at the position corresponding to each quadrilateral connecting rod structure (51), the fixed end of the telescopic structure (52) is arranged on the second side surface (12) or the third side surface (13), and the telescopic end is hinged with the hinge seat on the upper surface of the quadrilateral connecting rod structure (51);

the four corners of the screen mesh support (3) are respectively provided with one guide plate (54), and the guide plates (54) are fixed with the support plate (31) of the screen mesh support (3); and an elastic element (55) is arranged between each guide plate (54) and the linkage pressing plate (53) so that the linkage pressing plate (53) and the eccentric wheel set (56) are tangent at all times.

2. The vibrating screen of claim 1, wherein the screen tensioning mechanism (2) comprises a transmission mechanism (21), a first rubber roller (22), a second rubber roller (23), a third rubber roller (24), a first gear (25), a second gear (26), a third gear (27) and a fourth gear (28);

the transmission mechanism (21) is arranged on the fourth side surface (14) of the screen box (1);

the first rubber roller (22), the second rubber roller (23) and the third rubber roller (24) are all arranged in an inner cavity of the screen box (1), and the highest position of the second rubber roller (23) is parallel to a placing surface of the screen mesh support (3);

the rotating shaft of the first rubber roller (22) penetrates through the second side surface (12) and then is fixed with the driven end of the transmission mechanism (21);

the first gear (25) is sleeved on the rotating shaft of the first rubber roller (22);

the second gear (26) is positioned below the first gear (25), is meshed with the first gear (25) and is sleeved at one end of a rotating shaft of the second rubber roller (23);

the third gear (27) is sleeved at the other end of the rotating shaft of the second rubber roller (23);

two ends of a rotating shaft of the second rubber roller (23) are respectively and rotatably connected with the second side surface (12) and the third side surface (13);

the fourth gear (28) is meshed with the third gear (27) and is positioned above the third gear (27);

the fourth gear (28) is sleeved on the rotating shaft of the third rubber roller (24), and the rotating shaft of the third rubber roller (24) is rotatably connected to the third side surface (13);

the first rubber roller (22) and the third rubber roller (24) are coaxially arranged and have the same shape;

the first rubber roller (22), the second rubber roller (23) and the third rubber roller (24) are capable of pressing against the end of the screen corresponding to the end of the screen mesh carrier (3).

3. The vibrating screen of claim 2, wherein the transmission mechanism (21) comprises a first sprocket (211), a second sprocket (212), a chain (213), and a motor (214);

the motor (214) is arranged on the fourth side surface (14);

the first chain wheel (211) is sleeved on the rotating shaft of the motor (214), and the second chain wheel (212) is sleeved on the rotating shaft of the first rubber roller (22);

the chain (213) is sleeved on the first chain wheel (211) and the second chain wheel (212) at the same time.

4. The vibrating screen of claim 1, wherein the quadrilateral linkage arrangement (51) comprises a base plate (511), a plurality of links (512) and a plurality of shafts (513);

one end of each of the connecting rods (512) is hinged to the base plate (511), and the other end of each of the connecting rods is hinged to one rotating shaft (513);

the other end of the rotating shaft (513) is connected with the eccentric wheel set (56).

5. The vibrating screen of claim 1, wherein the telescoping structure (52) comprises an oil cylinder;

the fixed end of the oil cylinder is arranged on the second side face (12) or the third side face (13) in a corresponding position, and the telescopic end of the oil cylinder is hinged to the hinge seat on the upper surface of the quadrilateral connecting rod structure (51).

6. The vibrating screen of claim 1, wherein the resilient element (55) comprises a compression spring.

7. The vibrating screen of claim 1, further comprising a vertical bar (7);

one end of the vertical rod (7) is movably arranged in the mounting hole on the guide plate (54), and the other end of the vertical rod penetrates through the guide plate (54) and then is connected with the linkage pressing plate (53).

8. The vibrating screen of claim 1, further comprising bosses (8) and grooves (9);

the groove (9) is arranged below each guide plate (54), and the groove (9) is arranged on the placing surface of the screen mesh support (3);

the boss (8) is arranged on the bottom surface of the linkage pressing plate (53) and corresponds to the groove (9).

9. The vibrating screen of claim 1, further comprising a plurality of ballscrew screws (6);

the plurality of wave bead screws (6) are arranged on the placing surface of the screen mesh support (3) in a rectangular array mode, and the steel balls of the wave bead screws (6) are close to the screen mesh.

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