CN113102222A - Rotary classifying screen - Google Patents

Abstract

The invention relates to a rotary classifying screen which comprises a rack, wherein a driving device is arranged on the rack; the screen boat comprises a front end and a rear end which are oppositely arranged in the front-rear direction, the front end is connected with the rack in a relatively swinging manner, the rear end is connected with the driving device, so that the screen boat can swing back and forth relative to the rack under the driving of the driving device, and at least two layers of screen meshes are arranged in a chamber of the screen boat; the top cover is movably arranged at the top of the sieve ship and abuts against the sieve screen; the screen door is arranged at the front end of the screen ship in an openable mode to shield or open a ship cavity of the screen ship, and when the screen door opens the ship cavity of the screen ship, the screen can be pulled out from the rear end to the front end of the screen ship through the screen door opening position. Above-mentioned rotary classifying screen, the front end of sieve ship is equipped with the sieve door that can open, can pull out the screen cloth when opening the sieve door to need not lift out the top cap and can change the screen cloth.

Description

Rotary classifying screen

Technical Field

The invention relates to the technical field of screening treatment, in particular to a rotary grading screen.

Background

Traditional rotary classification sieve adopts the wood system framework, needs many people to lift the reel from the upside when needing to change the reel, and this kind of structure change screen cloth is very inconvenient to this kind of structure is not suitable for the cleanliness requirement and gradually improves, the cost of labor market trend that gradually increases.

Disclosure of Invention

Based on this, it is necessary to provide a rotary classifying screen aiming at the problem that the screen cloth of the traditional rotary classifying screen is inconvenient to replace.

A rotary classifying screen comprises a frame, wherein a driving device is arranged on the frame;

the screen boat comprises a front end and a rear end which are oppositely arranged in the front-rear direction, the front end is connected with the rack in a relatively swinging manner, the rear end is connected with the driving device, so that the screen boat can swing back and forth relative to the rack under the driving of the driving device, and at least two layers of screen meshes are arranged in a chamber of the screen boat; the top cover is movably arranged at the top of the sieve ship and abuts against the sieve screen; the screen door is arranged at the front end of the screen ship in an openable mode to shield or open a ship cavity of the screen ship, and when the screen door opens the ship cavity of the screen ship, the screen can be pulled out from the rear end to the front end of the screen ship through the screen door opening position.

Above-mentioned rotary classifying screen, the front end of sieve ship is equipped with the sieve door that can open, can pull out the screen cloth when opening the sieve door to need not lift out the top cap and can change the screen cloth.

In one embodiment, one end of the sieve door is hinged with the sieve boat, and the other end of the sieve door is detachably connected with at least one of the front end of the sieve boat and the top cover.

In one embodiment, the vessel cavity of the sieve vessel is provided with two layers of sieve meshes, two layers of sieve frames and an intermediate pressure frame, the lower layer of sieve frame is arranged at the bottom of the vessel cavity of the sieve vessel, and the intermediate pressure frame is positioned between the two layers of sieve frames, wherein the intermediate pressure frame presses the lower layer of sieve meshes on the lower layer of sieve frame, the upper layer of sieve frame presses the intermediate pressure frame, and the top cover presses the upper layer of sieve meshes on the upper layer of sieve frame.

In one embodiment, two ends of the screen mesh are respectively bent to form a fixed end, two ends of the screen frame are respectively provided with a semi-U-shaped anti-falling end, the screen mesh is in press connection with the screen frame, and the fixed end is supported against the inner side of the anti-falling end.

In one embodiment, the screen includes a plurality of screen sheets detachably joined to each other, and the screen frame includes a plurality of frame bodies detachably joined to each other.

In one embodiment, a first pressing edge, a second pressing edge and a plurality of supporting plates located between the first pressing edge and the second pressing edge are respectively arranged on two sides of the middle pressing frame, the plurality of supporting plates are sequentially arranged along the front-back direction, and the supporting plates are obliquely arranged from the front end to the rear end; the sieve boat is characterized in that a plurality of limiting parts are respectively arranged on two sides of the sieve boat, which are perpendicular to the front-back direction, the limiting parts are sequentially arranged along the front-back direction, the limiting parts extend into a boat cavity of the sieve boat and are positioned below the supporting plate, and when the middle pressing frame moves towards the sieve door, the supporting plate is tangent to the limiting parts so that the middle pressing frame is gradually lifted.

In one embodiment, a resisting device is further arranged in the chamber of the sieve vessel, and comprises a resisting body, an upper resisting part and a lower resisting part, wherein the upper resisting part and the lower resisting part are arranged on the resisting body, and the resisting body is connected to the side wall of the sieve vessel in a position-adjustable manner in a direction perpendicular to the front-back direction; in the front-rear direction, the upper resisting part is in butt joint with the upper screen and the upper screen frame, and the lower resisting part is in butt joint with the lower screen and the lower screen frame.

In one embodiment, a feed inlet is formed in the position, close to the rear end of the sieve vessel, of the top cover, a material distribution net with a plurality of through holes is arranged at one end, close to the sieve vessel, of the feed inlet, and the material distribution net is of a triangular structure arched towards the middle of one side close to the sieve vessel.

In one embodiment, a sliding connection portion is arranged on the rack, the sliding connection portion is provided with a hemispherical mounting hole, a spherical portion is connected to the front end, and the spherical surface of the spherical portion is in fit contact with the spherical surface of the mounting hole.

In one embodiment, the device further comprises a swinging arm, one end of the swinging arm is connected with the bottom of the front end, and the other end of the swinging arm is pivotally connected with the frame; the driving device is eccentrically and rotatably connected with the rear end of the sieve vessel.

Drawings

Fig. 1 is a schematic perspective view of a rotary classifying screen according to an embodiment of the present invention.

Fig. 2 is a side view of the rotary sizing screen shown in fig. 1.

Fig. 3 is a sectional view taken along the line a-a in fig. 2.

Fig. 4 is an enlarged view of the portion X in fig. 3.

FIG. 5 is a schematic view of a top cover of the rotary classifying screen at an angle.

FIG. 6 is a schematic view of another angle of the top cover of the rotary classifying screen.

Fig. 7 is a schematic structural view of the first screen.

Fig. 8 is an enlarged view of the portion Y in fig. 7.

Fig. 9 is a schematic structural view of the first screen frame.

Fig. 10 is a schematic structural view of the intermediate press frame.

Fig. 11 is a top view of the intermediate press frame shown in fig. 10.

Fig. 12 and 13 are schematic views of a connection structure between the front end of the rotary classifying screen and the frame at different angles.

Fig. 14 is a schematic structural view of the sliding coupling portion of fig. 13.

Fig. 15 is a schematic structural view of a pulley housing of the drive device.

Fig. 16 is a schematic structural view of the resisting device.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Aiming at the problem that a screen is inconvenient to replace in a traditional rotary classifying screen, the embodiment of the invention provides a rotary classifying screen. Embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the rotary classifying screen according to an embodiment of the present invention includes a top cover 1, a screen boat 2, a driving device 3, a frame 4, and a swinging device 5, wherein multiple layers of screen cloth (two layers in the example, including a first screen cloth 6 and a second screen cloth 9) are installed in the screen boat 2, the screen boat 2 is installed on the frame 4, and one end of the screen boat 2 is connected to the driving device 3, and the other end of the screen boat is connected to the swinging device 5, and the driving device 3 is configured to swing the screen boat 2 back and forth to drive materials in the screen boat 2 to be screened through the screen cloth.

In the embodiment of the present invention, for convenience of description, the end of the sieve vessel 2 close to the driving device 3 is defined as "rear end", and the end far from the driving device 3 is defined as "front end", but it should be understood that "front end" and "rear end" are only defined for convenience of expressing the position of the classifying screen in the drawing, and when the position of the classifying screen is changed, the "front end" and "rear end" will be changed accordingly. Specifically, in fig. 1, the sieve vessel has two opposite ends in the front-rear direction (left-right direction), where the left end of the sieve vessel 2 in fig. 1 is the front end and the right end of the sieve vessel 2 is the rear end. The front end of the sieve vessel 2 is connected with the frame 4 in a relatively swinging way through a swinging device 5, and the rear end of the sieve vessel 2 is connected with the driving device 3, so that the sieve vessel 2 can swing back and forth relative to the frame 4 under the driving of the driving device 3.

The sieve boat 2 is internally provided with n layers of sieve nets, wherein n is more than or equal to 2, namely at least two layers of sieve nets are arranged, and the sieve boat is internally divided into n +1 discharge areas by the n layers of sieve nets. As shown in fig. 1 and 2, in one example, two layers of screens are arranged in the sieve vessel 2, and the vessel cavity 210 in the sieve vessel 2 is divided into 3 discharge areas. As shown in fig. 2, a first screen 6, a first screen frame 7, an intermediate press frame 8, a second screen 9 and a second screen frame 10 are provided in a vessel cavity 210 of the screen vessel 2. The second screen mesh 9 is in press connection with the second screen frame 10, the second screen frame 10 is obliquely installed at the bottom of the ship cavity 210 of the screen ship 2, the upper end of the second screen mesh 9 is in press connection with the middle press frame 8, the upper end of the middle press frame 8 is in press connection with the first screen frame 7 and the first screen mesh 6 in press connection with the first screen frame 7, the installation direction of the first screen frame 7 is parallel to the installation direction of the second screen frame 10, the upper end of the first screen mesh 6 is tightly pressed through the top cover 1, namely the top cover 1 tightly presses the first screen mesh 6 and the first screen frame 7 on the middle press frame 8, the middle press frame 8 tightly presses the second screen mesh 9 and the second screen frame 10 at the lower end of the screen ship 2 under the upper pressure, and therefore the ship cavity 210 is divided into three screening areas through the two layers of screen meshes and the screen frames. Wherein, first screening area 201 is above first screen cloth 6, there is second screening area 202 between first reel 7 and the second screen cloth 9, second reel 10 below is third screening area 203, each screening area corresponds a discharge gate, namely first screening area 201 connects first discharge gate 206 down, second screening area connects second discharge gate 205 down, third screening area 203 connects third discharge gate 204 down, the effect in screening area is mainly that the material of the different fineness that sieves out with different screen cloth leads different discharge ends.

In one example, the first screen 6 is a coarse screen and the second screen 9 is a fine screen. The first screen 6 is the upper screen of the two screens, and the first screen frame 7 is the upper screen frame and is matched with the first screen 6; the second screen 9 is a lower screen of the two screens, and the second screen frame 10 is a lower screen frame, which is used in cooperation with the second screen 9.

As shown in fig. 1 and 2, in an example, a driving portion 14 is fixedly mounted at the rear end of a sieve boat 2, the driving portion 14 is connected with a driving device 3, the driving device 3 drives the sieve boat 2 to regularly swing back and forth, the front end of the sieve boat 2 is connected with a swinging device 5, the swinging device 5 can swing along with the swinging direction of the sieve boat 2, the sieve boat 2 is obliquely and downwardly mounted from the rear end to the front end, the lower bottom of a boat cavity 210 is also obliquely and downwardly arranged from the rear end to the front end, and the oblique and downwardly mounted is mainly used for facilitating discharge of materials for screening.

A top cover 1 is movably arranged on top of the sieve vessel 2 for positioning the sieve screen in the vessel cavity 210 of the sieve vessel 2. In a specific arrangement, the top cover 1 may be arranged to be mountable to and removable from the top of the sieve vessel 2.

In order to solve the problems described in the background art, in one embodiment, as shown in fig. 1, 2, 12 and 13, a reversible sieve door 12 is provided at the front end of the sieve vessel 2, and the sieve can be taken out after the sieve door 12 is turned over, so that the purpose of replacing the sieve can be achieved without removing the top cover 1.

Specifically, the sieve door 12 includes a door body 1203, and a connecting pin 1201 that hinges the lower end of the door body 1203 and the sieve boat 2, and a clamping assembly 1202 is further installed on the door body 1203, and the clamping assembly 1202 is used for clamping with the top cover 1 and the clamping buckle 105 arranged on the sieve boat 2. It should be noted that the clamping manner can be replaced by other detachable connection manners, as long as the screen door 12 can be detachably connected with the top cover 1 and the screen boat 2. For example, the sieve door 12 and the top cover 1 and the sieve vessel 2 may be connected by bolts.

In other embodiments, the sieve gate 12 is removably connected to the sieve vessel 2. When the screen door 12 is attached to the screening vessel 2, the screen door 12 shields the vessel cavity 210, at which time the screen cannot be replaced. When the sieve door 12 is removed from the sieve vessel 2, the chamber 210 is opened and the chamber 210 is connected to the outside, allowing the sieve to be pulled out.

In one example, as shown in fig. 3, in order to open the top cover 1 more conveniently, a gas spring 13 is installed between the top cover 1 and the sieve vessel 2, a piston rod of the gas spring 13 is connected with one side of the top cover 1, a cylinder body of the gas spring 13 is connected with one side of the sieve vessel 2, the gas spring 13 is mainly used for assisting the top cover 1 to be lifted upwards, and when a sieve screen needs to be replaced, the sieve door 12 is turned over to be opened, a part of the top cover 1 is lifted, and the sieve screen is pulled out.

The principle of the above-mentioned rotary classifying screen for replacing the screen is further described as follows: when the screen cloth needs to be replaced, the clamping components 1202 on the screen door 12 are sequentially opened, the screen door 12 is turned and opened, the top cover 1 is lifted, the air spring 13 can act at the moment, the top cover 1 is lifted by an angle in an auxiliary mode, the first screen cloth 6 is drawn out, if the second screen cloth 9 needs to be replaced, the middle pressing frame 8 is pulled out and does not compress the second screen cloth 9 any more, the second screen cloth can be drawn out at the moment, and when the screen cloth is replaced and installed, the screen cloth can be reversely operated according to the method.

Above-mentioned rotary classifying screen, sieve door 12 can take out the screen cloth after opening to can realize the purpose of changing the screen cloth under the condition that need not to lift off top cap 1, it is comparatively convenient, consume the manpower few.

In the traditional rotary grading screen, most screen meshes are integrally connected, and when the screen meshes are damaged, the whole screen mesh is usually replaced, so that the production cost is high.

In view of the above problems, in one embodiment of the present invention, an improved screen is provided. In the embodiment of the present invention, the first screen 6 and the second screen 9 have the same structure, and only the first screen 6 will be described in detail below as an example.

As shown in fig. 3, 4, 7 and 8, the first screen 6 is assembled in a modular manner, and the first screen 6 is mainly formed by a plurality of screen sheets 603 which are connected in a snap-fit manner. Specifically, one end of each screen sheet 603 is bent downwards to form a first insertion end 601, the other end opposite to the first insertion end 601 is bent to form a U-shaped first slot end 602, and the first insertion end 601 of each screen sheet 603 is used for being inserted into the first slot end 602 of the adjacent screen sheet 603 and sequentially connecting the screen sheets 603 by the method to form the first screen 6; the other two ends of the first screen 6 except the first insertion end 601 and the first slot end 602 on the same plane are bent downward to form a fixed end 604. If the splicing direction of the mesh sheets 603 is defined as a first direction of the first screen 6, both ends of the first screen 6 in a second direction have the above-mentioned fixed ends 604, respectively, and the first direction and the second direction are perpendicular to each other. In one example, the first direction is a length direction of the first screen 6, and the second direction is a width direction of the first screen 6.

As shown in fig. 4 and 9, the screen frame is also assembled in a modular manner, and the first screen frame 7 is described as an example since the first screen frame 7 and the second screen frame 10 are similar in structure. The first screen frame 7 is mainly formed by mutually clamping and embedding a plurality of frame bodies 701, a plurality of accommodating grooves 704 are formed in the top surface of each frame body 701, and a plurality of through holes (not numbered) for discharging materials screened by the screen are formed in the bottom surface of each accommodating groove 704. One end of each frame body 701 is bent downwards to form a second insertion end 702, the other end opposite to the second insertion end is bent to form a U-shaped second slot end 703, each frame body 701 sequentially inserts the second insertion end 702 into the second slot end 703 of the adjacent screen body 703 to form a first screen frame 7, and the other two ends of the first screen frame 7 except the second insertion end 702 and the second slot end 703 on the same plane are bent outwards to form a horizontal edge and then bent upwards to form a half-U-shaped anti-falling end 705. That is, the joining direction of the frame body 701 and the line direction of the both retaining ends 705 are perpendicular to each other, and for example, if the frame bodies 701 are joined in series in the longitudinal direction of the first screen frame 7, the both retaining ends 705 are provided at both ends in the width direction of the first screen frame 7.

The first screen 6 and the first frame 7 are mounted in the same manner as the second screen 9 and the second frame 10, and therefore only the first screen 6 and the first frame 7 will be explained in detail. As shown in fig. 4, the first screen 6 is pressed against the first frame 7, and the fixed ends 604 on both sides are received inside the retaining ends 705 on both sides of the first frame 7, so that the retaining ends 705 can be used to prevent the fixed ends of the first screen 6 from shifting during the swinging process. The fixed end 604 is received inside the retaining end 705 on both sides of the first screen frame 7, the finger-fixed end 604 is received on the side of the retaining end 705 close to the frame 701, and the retaining end 705 restricts the movement of the fixed end 604 away from the frame 701. Therefore, when the fixed ends 604 of the two ends of the first screen 6 are both received inside the two retaining ends 705 of the first frame 7, the first screen 6 is just caught between the two retaining ends 705.

In the embodiment, the modular design enables the screen cloth and the screen cloth not to be integrally replaced when being replaced, so that the replacement cost is reduced. The screen frame and the screen cloth can be more conveniently detached due to the modularized matching between the screen cloth and the screen frame.

In addition, it should be noted that, on the premise of the modularized cooperation between the screen mesh and the screen frame, the screen mesh itself is not limited to the above example when realizing the modularization, for example, the splicing of a plurality of screen mesh sheets 603 can be realized by using a mortise and tenon structure; similarly, the screen frame itself is not limited to the above example when realizing modularization, for example, the plurality of frame bodies 701 can be spliced by using a mortise and tenon structure.

Referring to fig. 3, 5, 6, 9, and 10, in an example, the middle pressing frame 8 is mainly formed by mounting a support 804 at two ends of a plurality of connecting rods 801, respectively, a horizontal first pressing edge 802 is disposed at an upper end of the support 804, a horizontal second pressing edge 803 is disposed at a lower end of the support 804, the first pressing edge 802 and the second pressing edge 803 extend to the same side of the support 804, and a gap is formed therebetween. The middle press frame 8 is supported with the first screen frame 7 in the length direction, the lower end of the first screen frame 7 is pressed on the first pressing edge 802, and the second pressing edges 803 on both sides of the lower end of the middle press frame 8 are pressed on the second screen cloth 9. A support frame 804 is respectively installed at two ends of the connecting rod 801, so that the first pressing edge 802 and the second pressing edge 803 are respectively arranged at two ends of the connecting rod 801. Namely, the two sides of the middle pressing frame 8 are respectively provided with the first pressing edge 802 and the second pressing edge 803.

As shown in fig. 1, 2, 3, and 10, in order to more conveniently pull out the screen, a plurality of support plates 805 are disposed between the first pressing edge 802 and the second pressing edge 803 of the middle pressing frame 8, the support plates 805 are disposed at equal intervals, the support plates 805 are sequentially arranged in the front-rear direction of the sieve vessel 2, and the support plates 805 are inclined from the front end to the rear end. A plurality of bolts 207 are respectively installed on both sides of the sieve vessel 2 perpendicular to the front-rear direction, and are equidistantly arranged along the front-rear direction of the sieve vessel 2. Through the above means, both sides of the middle pressing frame 8 are provided with the bolts 207, one end of the bolt 207 extending into the sieve vessel 2 is tangent to the lower end face of the support plate 805 when the middle pressing frame 8 is pulled out, that is, one end of the bolt 207 extending into the sieve vessel 2 is used when the middle pressing frame 8 is pulled out (when the middle pressing frame 8 moves towards the sieve door 12), the support plate 805 is tangent to the bolt 207 and gradually lifts up the middle pressing frame 8 along with the inclination of the support plate 805, so that the second screen 9 pressed by the middle pressing frame 8 can be easily taken out, and the second screen 9 can be taken out only by manually lifting up the middle pressing frame 8 after the first screen 6 is taken out. When the middle press frame 8 is pulled out, the bolts 207 on both sides are all acted, so that both sides of the middle press frame 8 are lifted.

It should be noted that the bolt 207 functions as a stopper capable of lifting the supporting plate 805, and it may be replaced by a stopper of other structure, such as a pin. The fore-and-aft direction of the sieve vessel 2 is the left-and-right direction in fig. 2, and if the fore-and-aft direction is defined as the longitudinal direction of the sieve vessel, both sides of the sieve vessel 2 perpendicular to the fore-and-aft direction are both sides of the sieve vessel 2 in the width direction.

As shown in fig. 1 and 3, a feed inlet 101 is formed at a position, close to the rear end of the screening vessel 2, at the upper end of the top cover 1, and is used for feeding materials to be screened into a vessel cavity 210. The lower end of the top cover 1 is provided with a press-contact part 103 for pressing the first screen 6. Specifically, the crimping portion 103 is a plate-shaped component disposed on two sides of the top cover 1 and arranged along the length direction of the top cover 1, the lower end of the crimping portion 103 is further provided with a pressure pad 104, the pressure pad 104 may be made of a material with certain elasticity, such as rubber, and the pressure pad 104 is mainly used for preventing the crimping portion 103 from scratching or damaging the first screen 6 when being crimped on the first screen 6, and meanwhile, the friction force at the contact position can be increased to prevent the screens from loosening.

The top cover 1 is further provided with a snap fastener 105 around for connecting with a snap component 1202 arranged on the sieve vessel 2, it should be understood that the connection manner is not limited to the manner shown in the drawings, and any manner that can movably connect the top cover 1 with the sieve vessel 2 can be realized.

Referring to fig. 3 and 5, in order to make the feeding more uniform, a material distribution net 102 is further disposed at the lower end of the feeding port 101, and the material distribution net 102 is provided with a plurality of through holes (not numbered) for feeding. The distribution net 102 is in a triangular structure which is arched towards the middle of one side close to the sieve vessel. The middle arched part can evenly divide the material downwards through the inclination of two sides, so that the material can be prevented from being accumulated on the screen, and the screening is more convenient.

In an example, the distribution net 102 includes a first distribution net 1021 and a second distribution net 1022, each of which is provided with a plurality of through holes, one end of the first distribution net 1021 and one end of the second distribution net 1022 are connected to each other and located below the feed inlet 101, and the other end of the first distribution net 1021 and the other end of the second distribution net 1022 are inclined downwards from the middle connection to the two ends, so that the first distribution net 1021 and the second distribution net 1022 form a triangular structure with a middle arch and two downward slopes, and the distribution net 102 can be connected to the lower end of the top cover 1 by mounting connection plates at the two sides. When materials to be screened enter from the feeding hole 101, the materials are firstly uniformly distributed downwards in an inclined mode through the middle arched part of the distribution net 102, and the materials can be prevented from being stacked on the screen, so that screening is more convenient. In addition, the distribution network 102 may also be an integrally formed intermediate arched structure.

As shown in fig. 2 and 16, in order to prevent the screen cloth and the screen frame from bouncing back and forth during the swinging of the screen vessel 2, a resisting device 11 is also installed in the screening machine. The resisting device 11 includes a resisting body 1101 and a resisting portion 1102 provided on the resisting body 1101, and the resisting portion 1102 may take various forms, and any structure capable of resisting the screen can be used as the resisting portion 1102. Taking the figure as an example, the blocking parts 1102 are supporting legs distributed at four corners of the blocking body 1101, the blocking part 1102 at the upper end is defined as an upper blocking part, and the upper blocking part blocks the junction of the front ends of the first screen 6 and the first screen frame 7, and at this time, the upper blocking part simultaneously blocks the first screen 6 and the first screen frame 7; the lower end abutting part 1102 abuts against the joint of the front ends of the second screen cloth 9 and the second screen frame 10, and the lower end abutting part 1102 is defined as a lower abutting part which abuts against the second screen cloth 9 and the second screen frame 10 at the same time. In the direction perpendicular to the front-back direction, the position of the retaining body 1101 is adjustably connected with two side walls of the sieve vessel 2, where the connection includes any connection manner that can achieve the adjustable connection of the retaining body 1101, for example, by setting an adjustable displacement structure such as a screw rod and the like to perform corresponding adjustment.

By the above means, in the front-rear direction, the blocking body 1101 limits the position of the screen cloth and the screen frame from the two sides, and the screen cloth and the screen frame are prevented from bouncing back and forth in the swinging process of the screen ship 2. When the retaining device 11 is arranged, when the screen cloth needs to be replaced, the clamping components 1202 on the screen door 12 are sequentially opened, the screen door 12 is turned over and opened, the top cover 1 is lifted, the air spring 13 can act at the moment, the top cover 1 is lifted by an angle in an auxiliary mode, the retaining device 11 is detached, the first screen cloth 6 is drawn out, if the second screen cloth 9 needs to be replaced, the middle pressing frame 8 is pulled out and does not compress the second screen cloth 9 any more, the second screen cloth can be drawn out at the moment, and when the replacement is finished, the reverse operation can be carried out according to the method.

As shown in fig. 12, 13, and 14, the swing device 5 includes a connecting portion 501 fixed to the bottom of the front end of the sieve vessel 2, a rotating portion 502, and a swing arm 503 having one end mounted on the rotating portion 502 and the other end connected to the connecting portion 501, the rotating portion 502 is fixed to the frame 4, the swing arm 503 and the rotating portion 502 are connected to each other through a pivot so as to be relatively rotatable, and specifically, the swing arm 503 and the rotating portion 502 are supported and connected through an adapter bearing.

In order to reduce the abrasion of a connecting part (a swinging device 5) caused by the side inclination in the motion process of the sieve vessel 2, the front end of the frame 4 close to the sieve vessel 2 is also provided with a sliding connecting part 504, one end of the sliding connecting part 504 is fixed on the frame 4, the other end of the sliding connecting part is provided with a hemispherical mounting hole 5041, a sliding part 505 matched with the diameter of the sliding connecting part is arranged in the mounting hole 5041, the sliding part 505 can be made of graphite, the lubricating performance is good, the sliding part 505 is almost free of pollution, the sliding part 505 comprises a spherical part 5051, and the spherical part 5051 is in adaptive contact with the spherical surface. In one example, the ball 5051 is a table with two sections, the larger section for contacting the bottom of the sieve vessel 2 and the smaller section placed in the mounting hole 5041 of the sliding connection 504 and having the table ball surface in mating contact with the ball surface of the mounting hole 5041. As shown in fig. 14, the top surface of the ball-type portion 5051 is adapted to connect with the bottom of the screening vessel 2 and the bottom surface of the ball-type portion 5051 is adapted to mate with the mounting hole 5041. When the sieve vessel 2 is inclined in multiple directions during movement, if a rigid support connection is adopted, the components at the front end or the rear end of the sieve vessel 2 are easily deviated or greatly abraded, so that the contact surface of the ball table can be correspondingly supported in a sliding manner by using the spherical surface when the sieve vessel 2 is inclined, and the abrasion of the connection part is effectively reduced. It should be understood that the table herein may also be used directly in a hemispherical configuration, i.e., without taking a smaller cross-section, where the bottom surface of the spherical portion 5051 is spherical rather than planar.

The drive device 3 is used for driving the sieve vessel 2 to swing eccentrically. In one embodiment the drive means 3 is eccentrically rotatably connected to the rear end of the sieve vessel 2. The driving device 3 can drive the sieve vessel 2 to eccentrically swing, and the specific implementation structure is not limited.

In an example, as shown in fig. 1, 2 and 15, the driving device 3 includes a pulley housing 301, and a load-carrying block 302 disposed in the pulley housing 301, the pulley housing 301 defines an accommodating chamber 3011 around an axis, the load-carrying block 302 is disposed in the accommodating chamber 3011, and the load-carrying block 302 is used to mainly counteract a portion of a centrifugal force generated by the sieve vessel 2 during the swinging process, so that the vibration of the classifying screen is smaller.

The driving device 3 further includes a fixing shaft 303 mounted on the frame 4, and a power unit 305, the pulley housing 301 is rotatably sleeved on the fixing shaft 303, and the power unit 305 is in transmission connection with the pulley structure of the pulley housing 301 for driving the pulley housing 301 to rotate around the fixing shaft 303. The rear end of the sieve vessel 2 is provided with a driving part 14, the driving part 14 is provided with a transmission shaft 304, the transmission shaft 304 is connected to the belt wheel shell 301 through an intermediate part 306, and the transmission shaft 304 and the fixed shaft 303 are eccentrically arranged. Thus, when the pulley shell 301 rotates, the driving portion 14 can be driven to eccentrically swing, so that the swing of the whole screening machine is realized.

In other embodiments, the driving shaft of the motor may be directly used to perform an eccentric transmission with the transmission shaft 304, so that the driving device 3 drives the sieve vessel 2 to eccentrically swing.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A rotary classifying screen, comprising:

the device comprises a rack, wherein a driving device is arranged on the rack;

the screen boat comprises a front end and a rear end which are oppositely arranged in the front-rear direction, the front end is connected with the rack in a relatively swinging manner, the rear end is connected with the driving device, so that the screen boat can swing back and forth relative to the rack under the driving of the driving device, and at least two layers of screen meshes are arranged in a chamber of the screen boat;

the top cover is movably arranged at the top of the sieve ship and abuts against the sieve screen;

the screen door is arranged at the front end of the screen ship in an openable mode to shield or open a ship cavity of the screen ship, and when the screen door opens the ship cavity of the screen ship, the screen can be pulled out from the rear end to the front end of the screen ship through the screen door opening position.

2. The rotary sizing screen according to claim 1 wherein one end of the screen door is hinged to the screen boat and the other end of the screen door is removably connected to at least one of the forward end of the screen boat and the top cover.

3. The rotary classifying screen according to claim 1, wherein the vessel cavity of the screening vessel is provided with two layers of screen mesh, two layers of screen frames and an intermediate press frame, the screen frame of the lower layer is installed at the bottom of the vessel cavity of the screening vessel, the intermediate press frame is located between the two layers of screen frames, wherein the intermediate press frame presses the screen mesh of the lower layer against the screen frame of the lower layer, the screen frame of the upper layer against the intermediate press frame, and the top cover presses the screen mesh of the upper layer against the screen frame of the upper layer.

4. The rotary classifying screen according to claim 3, wherein both ends of the screen mesh are respectively bent and formed into fixing ends, both ends of the screen frame are respectively provided with a half U-shaped anti-falling end, the screen mesh is press-connected to the screen frame, and the fixing ends are supported against the inner sides of the anti-falling ends.

5. The rotary sizing screen of claim 4 wherein the screen mesh comprises a plurality of screen mesh pieces removably attached to one another and the screen frame comprises a plurality of frame bodies removably attached to one another.

6. The rotary classifying screen according to claim 3, wherein a first pressing edge, a second pressing edge, and a plurality of support plates located between the first pressing edge and the second pressing edge are respectively disposed on both sides of the middle pressing frame, the plurality of support plates are sequentially arranged along the front-rear direction, and the support plates are disposed obliquely from the front end to the rear end; the sieve boat is characterized in that a plurality of limiting parts are respectively arranged on two sides of the sieve boat, which are perpendicular to the front-back direction, the limiting parts are sequentially arranged along the front-back direction, the limiting parts extend into a boat cavity of the sieve boat and are positioned below the supporting plate, and when the middle pressing frame moves towards the sieve door, the supporting plate is tangent to the limiting parts so that the middle pressing frame is gradually lifted.

7. The rotary classifying screen according to claim 3, wherein a retaining device is further provided in the chamber of the screen boat, the retaining device comprising a retaining body, an upper retaining portion and a lower retaining portion provided on the retaining body, the retaining body being connected to the side wall of the screen boat in a position adjustable manner in a direction perpendicular to the front-rear direction; in the front-rear direction, the upper resisting part is in butt joint with the upper screen and the upper screen frame, and the lower resisting part is in butt joint with the lower screen and the lower screen frame.

8. The rotary classifying screen according to claim 1, wherein a feed inlet is provided on the top cover near the rear end of the screen boat, a material separating net having a plurality of through holes is provided at one end of the feed inlet near the screen boat, and the material separating net is a triangular structure that is arched toward the middle of one side near the screen boat.

9. The rotary classifying screen according to claim 1, wherein a sliding connection portion is provided on the frame, the sliding connection portion is provided with a hemispherical mounting hole, a spherical portion is connected to the front end, and a spherical surface of the spherical portion is in fit contact with a spherical surface of the mounting hole.

10. The rotary sizing screen of claim 1 further comprising a swing arm, one end of said swing arm being connected to the bottom of said front end and the other end of said swing arm being pivotally connected to said frame; the driving device is eccentrically and rotatably connected with the rear end of the sieve vessel.

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