CN216026138U - Rotary screen - Google Patents

Abstract

The utility model relates to a rotary screen, comprising: a frame; a screen body; the driving mechanism comprises a transmission part and a driving part, the transmission part is connected with the screen body to drive the screen body to swing, the transmission part comprises a fixed frame connected with the screen body and a first belt wheel rotatably arranged on the fixed frame, and the driving part comprises a second belt wheel connected with the first belt wheel through a transmission belt; the counterweight part comprises a first counterweight block and a second counterweight block, the first counterweight block and the second counterweight block are respectively connected with the arc-shaped slide rail on the first belt pulley in a sliding manner along the circumferential direction of the first belt pulley, and the first counterweight block and the second counterweight block have a height difference along the axial direction of the first belt pulley so as to be partially overlapped in the axial direction of the first belt pulley. The eccentric effect of the counterweight part is changed by adjusting the positions of the first counterweight block and the second counterweight block in the circumferential direction of the first belt wheel, so that the swing amplitude of the rotary screen can be adjusted.

Description

Rotary screen

Technical Field

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

Background

A rotary screen is an apparatus for realizing multi-stage screening of materials (such as feed and grain), and generally comprises a screen body, wherein a plurality of layers of screen meshes are assembled in the screen body. In traditional rotary screen, only can adapt to single product screening, can not satisfy the parameter switching between the different materials and sieve the switching demand, lead to the screening effect to reach the optimum, complete machine adaptability is poor.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a rotary screen for the problem that the requirements of parameter switching and screening switching between different materials cannot be met simultaneously.

A rotary screen comprising: a frame; the screen body is suspended on the rack; the driving mechanism comprises a transmission part and a driving part, the transmission part is connected with the screen body to drive the screen body to swing, the transmission part comprises a fixed frame connected with the screen body and a first belt wheel rotatably arranged on the fixed frame, and the driving part comprises a second belt wheel connected with the first belt wheel through a transmission belt; the counterweight part comprises a first counterweight block and a second counterweight block, the first counterweight block and the second counterweight block are respectively connected with the arc-shaped slide rail on the first belt pulley in a sliding manner along the circumferential direction of the first belt pulley, and the first counterweight block and the second counterweight block have a height difference along the axial direction of the first belt pulley so as to be partially overlapped in the axial direction of the first belt pulley.

Above-mentioned rotary screen when the material is changed to needs, when the swing range of the different materials of needs adaptation, changes the eccentric effect of counter weight portion through adjusting first balancing weight and the ascending position of second balancing weight in the circumference of first band pulley and overlap degree to the realization is to the adjustment of rotary screen swing range.

In one embodiment, the arc-shaped sliding rail is arranged on one side of the first belt wheel, the arc-shaped sliding rail is concentric with the first belt wheel, a first sliding block and a second sliding block are slidably connected to the arc-shaped sliding rail, the first balancing weight is connected with the first sliding block, and the second balancing weight is connected with the second sliding block.

In one embodiment, the arc-shaped sliding rails are respectively arranged on two sides of the first belt wheel, the arc-shaped sliding rails on the two sides are symmetrical with respect to the center of the wheel of the first belt wheel, and the first balancing weight and the second balancing weight are in one-to-one sliding connection with the two arc-shaped sliding rails.

In one embodiment, during the sliding process of the first balancing weight and the second balancing weight, the edge of the first balancing weight, which faces away from the wheel center of the first belt wheel, does not exceed the edge of the first belt wheel, and the edge of the second balancing weight, which faces away from the wheel center of the first belt wheel, does not exceed the edge of the first belt wheel.

In one embodiment, the first balancing weight and the second balancing weight are respectively in a fan-ring shape, and the arc-shaped edge of the first balancing weight and the arc-shaped edge of the second balancing weight both face away from the wheel center of the first belt wheel.

In one embodiment, the first weight block and the second weight block are consistent in shape and weight.

In one embodiment, the sliding track further comprises a control mechanism, wherein the control mechanism is connected with the first balancing weight and the second balancing weight and used for controlling the positions of the first balancing weight and the second balancing weight on the arc-shaped sliding track.

In one embodiment, the control mechanism includes two control rods respectively connected to the first and second weights, one end of the control rod extends out of the frame, and the other end of the control rod is rotatably connected to the first or second weight.

In one embodiment, the control mechanism comprises a power part and two driving parts synchronously driven by the power part, the moving directions of the two driving parts are always opposite, the moving tracks of the two driving parts are respectively arc-shaped and concentric with the wheel center of the first belt wheel, and the two driving parts are respectively connected with the first balancing weight and the second balancing weight.

In one embodiment, the drive section is a robot.

Drawings

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

Fig. 2 is a schematic cross-sectional view of the rotary screen shown in fig. 1.

Fig. 3 is a schematic structural view of a transmission part of the rotary screen shown in fig. 1.

Fig. 4 is a side view of the transmission portion shown in fig. 3.

Fig. 5 is an assembly view of the first pulley and the weight.

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 utility model 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 utility model.

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.

The embodiment of the utility model provides a rotary screen. The rotary screen is also called a rotary grading screen, a rotary combined screen, a combined rotary screen and the like, and is provided with a screen body capable of swinging, wherein at least two layers of screen meshes are arranged in the screen body, and the screen meshes divide the screen body into a plurality of screening areas from top to bottom. The screen body swings in a reciprocating manner so as to drive materials in the screen body to be screened by the screen, and then the screened materials and impurities are discharged from different screening areas. 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 screen of the embodiment of the present invention includes a feed part 1, a frame 2, an electric assembly 3, an upper screen boat 4, a hanging part 5, a transmission part 6, a lower screen boat 7, a lower rotary door 8, an upper rotary door 9, and a discharge collecting device 19. Wherein the upper sieve vessel 4 and the lower sieve vessel 7 constitute a sieve body which can swing together. The screen body is suspended from the frame 2 by a suspension 5. The transmission part 6 is used for driving the screen body to swing back and forth. The electric assembly 3 is used for controlling the whole machine to realize automatic work.

The upper sieve boat 4 and the lower sieve boat 7 have the same structure, and two layers of sieve nets are respectively arranged in the upper sieve boat and the lower sieve boat. As shown in fig. 2, the upper sieve vessel 4 is taken as an example, and the upper sieve vessel 4 is provided with an upper and a lower layer of sieve mesh 41. The upper sieve vessel 4 has a first sieve area formed above the upper sieve screen 41, a second sieve area formed between the two sieve screens, and a third sieve area formed below the lower sieve screen 41. Each screening zone is connected to a different material channel of the discharge and collection device 19. In this embodiment, the first screening area, the second screening area, and the third screening area are configured as a large impurity screening area 1901, a finished product screening area 1902, and a small impurity screening area 1903, respectively. More specifically, in the case of screening pet food, impurities having a particle size larger than that of the finished food are defined as macro-impurities and may be left in the macro-impurity screening zone 1901; finished feed remains in finished product screening area 1902 and impurities having a particle size less than that of the finished feed are defined as small impurities and can enter small impurity screening area 1903. The two layers of screen cloth in the lower sieve boat 7 are arranged in the same way as the two layers of screen cloth in the upper sieve boat 4, and are not described again.

In the embodiments of the present invention, the terms "front end", "rear end", "upper end" and "lower end" are used for convenience of description. Generally, the front end and the upper end refer to the position of a part or element closer to the starting point of the material in the flow direction of the material. Additionally, the term downstream is used, where downstream is relative, referring to the more posterior of the two locations in the direction of flow of the material.

The feeding part 1 and the discharging and collecting device 19 are respectively arranged at the front end and the rear end of the screen body. In order to facilitate the feeding of the screened material and impurities into the corresponding material channels of the discharge and collection device 19 by the screen. In the present embodiment, as shown in fig. 2, the screen 41 is inclined downward with respect to the horizontal direction in the direction from the front end to the rear end, i.e., in the left-right direction. Herein, when referring to an inclination or an inclined direction, a horizontal direction is referred to unless otherwise specified. Specifically, the right end of the screen 41 is inclined downward such that the right end of the screen 41 is lower than the left end of the screen 41 in the vertical direction. The upper sieve vessel 4 and the lower sieve vessel 7 are respectively inclined downwards, and the sieve body formed by the upper sieve vessel and the lower sieve vessel is inclined downwards. When the screen frame reciprocated swing like this, the material after the screening and impurity can also be carried in corresponding material passageway under the effect of gravity, then improve complete machine efficiency. Lower and upper swing doors 8 and 9 are provided at the front end of the screen body for shielding the screens 41 fitted in the upper and lower sieve boats 4 and 7, respectively. The lower revolving door 8 and the upper revolving door 9 can be opened or closed, and the screen cloth in the corresponding sieve boat can be replaced when the lower revolving door and the upper revolving door are opened.

As shown in fig. 1 and 2, in the present embodiment, the screen body (the upper sieve carrier 4 and the lower sieve carrier 7) is driven to swing back and forth by the driving mechanism. The driving mechanism comprises a transmission part 6 and an external driving part 11, namely the transmission part 6 is powered by the external driving part 11, and then the transmission part 6 drives the upper sieve boat 4 and the lower sieve boat 7 to do swinging motion, so that materials are screened.

As shown in figure 1, the upper sieve boat 4 is arranged above the lower sieve boat 7, a transmission part 6 is arranged between the upper sieve boat 4 and the lower sieve boat 7, and the upper sieve boat 4 and the lower sieve boat 7 are hung on the frame 2 through a hanging part 5. In one example, the suspension part 5 comprises a suspension body 501, the upper end of the suspension body 501 is connected with the upper sieve boat 4, the lower end of the suspension body 501 is connected with the lower sieve boat 7, and a suspension rod 502 is further installed on the suspension body 501, wherein one end of the suspension rod 502 is connected with the suspension body 501, and the other end of the suspension rod 502 is movably connected with the frame 2, so that the suspension rod 502 can swing along with the sieve body. In particular, the other end of the boom 502 may be pivotally connected to the frame 2 or connected to the frame 2 by a flexible member. When specifically setting up, the quantity of the 5 of portion of hanging is 4, 4 the 5 of portion of hanging is located respectively the four corners of screen frame does benefit to the screen frame like this and realizes steady swing.

As shown in fig. 3 to 5, in an embodiment, the transmission part 6 includes a fixed frame 61, wherein the upper sieve boat 4 is installed above the fixed frame 61, the lower sieve boat 7 is installed below the fixed frame 61, and a first pulley 611 is disposed in the fixed frame 61. Namely, the upper sieve boat 4 and the lower sieve boat 7 are respectively arranged at the upper side and the lower side of the fixing frame 61. The driving part 11 includes a transmission motor 1101 and a second pulley 1102, and the transmission motor 1101 provides a driving force to the second pulley 1102. The second pulley 1102 is in driving connection with the first pulley 611 via a transmission belt.

As shown in fig. 5, the weight portion 12 is attached to the first pulley 611 side, and the weight portion 12 is eccentrically disposed with respect to the wheel center of the first pulley 611. In other words, the weight portion 12 is eccentrically connected to the first pulley 611. The transmission motor 1101 during operation drives the second belt pulley 1102 to rotate, the second belt pulley 1102 drives the first belt pulley 611 to rotate, and the first belt pulley 611 swings due to the fact that one side of the first belt pulley is provided with the counterweight 12 and can generate inertia force, so that the upper sieve boat 4 and the lower sieve boat 7 are driven to swing, and materials are screened.

In the present embodiment, the fixing frame 61 of the transmission part 6 and the first pulley 611 are integrated into one part, which is integrally disposed between the upper sieve vessel 4 and the lower sieve vessel 7; before use, the first belt wheel 611 and the second belt wheel 1102 are only required to be in transmission connection through a transmission belt, so that modular design and installation are achieved. The transmission part 6 utilizes the fixed frame 61 to transmit power, and the fixed frame 61 is conveniently connected with the upper sieve boat 4 and the lower sieve boat 7. In particular, the position of the fixing frame 61 connected to the upper and lower sieve boats 4 and 7 is flexible, for example, not limited to the connection at the central position of the upper and lower sieve boats 4 and 7, which facilitates the overall structural arrangement of the rotary sieve. Referring to fig. 2 and 3, in one example, the fixed frame 61 is in the shape of a frame, and is placed between the upper sieve vessel 4 and the lower sieve vessel 7, and can be connected with the upper sieve vessel 4 and the lower sieve vessel 7 by using any suitable position of the fixed frame 61.

On the basis of the inclined arrangement of both the upper and lower sieve vessels 4, 7, the inclination direction of both intersects the radial plane of the first pulley 611. Specifically, as shown in fig. 2, referring to fig. 4 in combination, in the case of the upper sieve vessel 4, the left end of the upper sieve vessel 4 is high and the right end is low, and the radial plane of the first pulley 611 is high at the right end and low at the left end, so that the inclination direction of the upper sieve vessel 4 intersects with the radial plane of the first pulley 611. When the first pulley 611 swings under the action of inertia force, an angle exists between the direction of the swinging force transmitted to the upper sieve vessel 4 and the upper sieve vessel 4, so that the upper sieve vessel 4 bears component forces in different directions, and the upper sieve vessel 4 is more easily swung.

As mentioned in the background, the need for parameter switching and sieve switching between different materials is a pressing issue due to the different swing amplitudes required for different materials. The rotary screen in the traditional technology can not meet the requirements of parameter switching and screening switching among different materials, so that the screening effect cannot reach the optimal value. In this regard, the inventor's research has shown that the essential reason is that the screen body of the conventional rotary screen is fixed with a weight block, and the vibration amplitude of the screen body is determined by setting the weight of the weight block. The balancing weight is set well according to the inherent characteristics of the customer product before the manufacturer leaves the factory, so that the balancing weight can only adapt to the screening of a single product. Aiming at the problems, the utility model provides the following solution in order to adapt to the swing amplitude of different materials.

Specifically, the weight part 12 on the first pulley 611 includes a first weight block 121 and a second weight block 122, the first weight block 121 and the second weight block 122 are respectively connected with the arc-shaped slide rail 13 on the first pulley 611 in a sliding manner along the circumferential direction of the first pulley 611, and the first weight block 121 and the second weight block 122 have a height difference along the axial direction of the first pulley 611 so as to be capable of partially overlapping in the axial direction of the first pulley 611. When the swing amplitude of different materials needs to be adapted, the eccentric effect of the counterweight part is changed by adjusting the positions of the first counterweight block 121 and the second counterweight block 122 in the circumferential direction of the first belt wheel 611, so that the swing amplitude of the rotary screen is adjusted.

As shown in fig. 5, an arc-shaped sliding rail 13 is disposed on one side of the first belt wheel 611, the arc-shaped sliding rail 13 is concentric with the first belt wheel 611, a first sliding block 14 and a second sliding block 15 are respectively disposed at two ends of the arc-shaped sliding rail 13 in a sliding manner, the first balancing weight 121 is connected to the first sliding block 14, and the second balancing weight 122 is connected to the second sliding block 15. By the above means, the first and second weights 121 and 122 can slide along the arc-shaped path, specifically, the first and second weights 121 and 122 can rotate around the wheel center a of the first pulley 611. The size, shape, etc. of the first slider 14 and the second slider 15 are different, so that the first weight block 121 and the second weight block 122 have a height difference. In this way, the first balancing weight 121 and the second balancing weight 122 can rotate around the wheel center a of the first pulley 611, so that the overlapping degree of the first balancing weight 121 and the second balancing weight 122 can be adjusted, the eccentric effect of the balancing weight part is changed, and the swing amplitude of the rotary screen can be adjusted.

In another embodiment, the arc-shaped sliding rails 13 are respectively disposed on two sides of the first belt pulley 611, the arc-shaped sliding rails 13 on the two sides are symmetric with respect to the center a of the first belt pulley 611, and the first balancing weight 121 and the second balancing weight 122 are slidably connected to the two arc-shaped sliding rails 13 in a one-to-one correspondence manner.

Referring to fig. 5, during the sliding of the first and second weights 121 and 122, the edge of the first weight 121 facing away from the wheel center a of the first pulley 611 does not exceed the edge of the first pulley 611, and the edge of the second weight 122 facing away from the wheel center a of the first pulley 611 does not exceed the edge of the first pulley 611. Specifically, the first weight block 121 and the second weight block 122 are respectively in a fan-shaped ring shape, and the arc-shaped edges of the first weight block 121 and the second weight block 122 are back to the wheel center a of the first pulley 611. That is, in the process that the first balancing weight 121 and the second balancing weight 122 rotate around the wheel center a of the first pulley 611, the outer edges of the first balancing weight 121 and the second balancing weight 122 do not exceed the edge of the first pulley 611. Thus, the rotation of the first balancing weight 121 and the second balancing weight 122 has a small influence on the arrangement of other elements in the rotary screen, for example, the requirement on structural modification of the fixing frame 61 carrying the first pulley 611 is small, and how to mount the first pulley 611 is mainly considered by the fixing frame 61. Preferably, the first weight 121 and the second weight 122 have the same shape and weight. Therefore, the swing amplitude change of the rotary screen can be regularly designed.

In order to facilitate the adjustment of the positions of the first counterweight 121 and the second counterweight 122, the rotary screen may further include a control mechanism (not shown) connected to the first counterweight 121 and the second counterweight 122 for controlling the positions of the first counterweight 121 and the second counterweight 122 on the arc-shaped slide rail 13.

In one example, the control mechanism comprises two control rods connected to the first counterweight 121 and the second counterweight 122, respectively, and one end of each control rod extends outside the frame. The other end of the control rod is connected to the first weight 121 or the second weight 122 in a relatively rotatable manner to prevent locking. By the above means, the first weight member 121 and the second weight member 122 can be adjusted in position independently of each other.

In another example, the control mechanism can control the first weight 121 and the second weight 122 to rotate synchronously. For example, the control mechanism includes a power portion and two driving portions synchronously driven by the power portion, the moving directions of the two driving portions are always opposite, the moving tracks of the two driving portions are also respectively arc-shaped and concentric with the wheel center of the first belt wheel, and the two driving portions are respectively connected with the first counterweight 121 and the second counterweight 122. The drive unit may be a robot.

In other embodiments, the first weight member 121 and the second weight member 122 may be fastened by bolts. When the radial positions of the first counterweight block 121 and the second counterweight block 122 need to be adjusted, the bolts are loosened, and then the bolts are reused for fixing after being adjusted to the proper positions.

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 to be construed as limiting the scope of the utility model. 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 utility model, and these changes and modifications are all within the scope of the utility model. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A rotary screen, comprising:

a frame;

the screen body is suspended on the rack;

the driving mechanism comprises a transmission part and a driving part, the transmission part is connected with the screen body to drive the screen body to swing, the transmission part comprises a fixed frame connected with the screen body and a first belt wheel rotatably arranged on the fixed frame, and the driving part comprises a second belt wheel connected with the first belt wheel through a transmission belt;

the counterweight part comprises a first counterweight block and a second counterweight block, the first counterweight block and the second counterweight block are respectively connected with the arc-shaped slide rail on the first belt pulley in a sliding manner along the circumferential direction of the first belt pulley, and the first counterweight block and the second counterweight block have a height difference along the axial direction of the first belt pulley so as to be partially overlapped in the axial direction of the first belt pulley.

2. The rotary screen of claim 1, wherein the arcuate slide track is disposed on one side of the first pulley, the arcuate slide track is concentric with the first pulley, a first slide block and a second slide block are slidably connected to the arcuate slide track, the first counterweight block is connected to the first slide block, and the second counterweight block is connected to the second slide block.

3. The rotary screen of claim 1, wherein the arcuate slide rails are respectively disposed on two sides of the first belt pulley, the arcuate slide rails on the two sides are symmetrical with respect to a wheel center of the first belt pulley, and the first counterweight block and the second counterweight block are slidably connected to the arcuate slide rails in a one-to-one correspondence.

4. The gyratory sieve of claim 1 wherein during sliding movement of the first and second counterweights, an edge of the first counterweight facing away from the center of the first pulley does not extend beyond an edge of the first pulley and an edge of the second counterweight facing away from the center of the first pulley does not extend beyond an edge of the first pulley.

5. The rotary screen of claim 4, wherein the first and second weights each have a sector-ring shape, and wherein the arcuate edge of the first weight and the arcuate edge of the second weight both face away from the center of the first pulley.

6. The rotary screen of claim 1, wherein the first and second weights are identical in shape and weight.

7. The rotary screen of claim 1, further comprising a control mechanism coupled to the first and second weights for controlling the position of the first and second weights on the arcuate slide.

8. The rotary screen of claim 7, wherein the operating mechanism includes two control rods connected to the first and second counterweights, respectively, one end of the control rod extending outside the frame and the other end of the control rod being rotatably connected to the first or second counterweight.

9. The rotary screen of claim 7, wherein the control mechanism comprises a power unit and two driving units driven by the power unit synchronously, the driving units move in opposite directions, the driving units move in an arc and concentric with the wheel center of the first pulley, and the driving units are connected to the first and second counterweights.

10. The rotary screen of claim 9, wherein the drive section is a robot.

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