Conical internal spiral high-frequency vibrating screen

Abstract

A conical internal spiral high-frequency vibrating screen comprises a supporting framework and a screen mesh installed at the bottom of the supporting framework. The support framework comprises a support base and a plurality of support baffle rings formed on the support base, and the plurality of support baffle rings are concentrically arranged at the center of the support base; the supporting base is divided into a plurality of screening channels which are sequentially arranged from outside to inside through the supporting baffle rings, feeding ports used for communicating the adjacent screening channels are formed in the supporting baffle rings, and the screening channel on the outermost circle is provided with an initial material port used for initially stacking materials; compared with the prior art, the screening net is divided into the screening channels which are sequentially communicated only through the feeding ports through the multiple supporting baffle rings, materials are screened through the multiple screening channels, and therefore the screening area of the screening net in the material screening process is greatly increased, the screening net is connected under the action of the supporting framework, and the screening efficiency is improved. The material weight borne by the screen is greatly increased, and the requirement for effective screening of high-weight materials is met.

Description

Technical Field

[0001] This invention relates to the field of screening equipment technology, specifically to a conical internal spiral high-frequency vibrating screen. Background Technology

[0002] In existing technologies, stainless steel screens are typically used to screen materials. During the screening process, materials are screened on the screen through vibration or rotation. Rotary screening, however, is prone to material accumulation on the outer ring of the screen due to centrifugal force during rotation, resulting in low overall screen utilization and affecting screening efficiency. Vibration screening, on the other hand, can easily transmit vibrations to the supporting structure or the ground, causing noise pollution. Furthermore, vibration screening has significant limitations on the weight-bearing capacity of the materials; excessive material weight can easily cause the screen support to break, thus affecting the screening effect.

[0003] Chinese patent CN220027789U discloses a material screening device, including a bottom frame, an outer cover fixed to the top of the bottom frame, a first annular guard and a second annular guard fixed to the bottom frame on the inner side of the outer cover, the first annular guard being located inside the second annular guard and concentrically arranged with the second annular guard, and a hollow frustum fixed at the top center of the bottom frame.

[0004] The aforementioned screening device uses vibration to make the material spiral forward in the feeding channel during the screening process. However, due to the complex path of the aforementioned screening device, the material movement is slow and affects the screening efficiency because it relies solely on vibration to achieve the movement of the material. At the same time, the aforementioned screening device starts feeding from the center of the screen and the screen has no support structure. The screen is difficult to effectively support a certain weight of material, and there is a risk that the middle of the screen may sink, affecting the overall screening effect. Summary of the Invention

[0005] The present invention aims to overcome the defects in the prior art and provide a conical internal spiral high-frequency vibrating screen with a stable structure and good screening effect.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a conical internal spiral high-frequency vibrating screen, comprising a support frame and a screen installed at the bottom of the support frame; the support frame includes a support base and a plurality of support retaining rings formed on the support base, the support base having a conical structure inclined downward from the outside to the inside, and the plurality of support retaining rings being concentrically arranged around the center of the support base; the plurality of support retaining rings divide the support base into a plurality of screening channels arranged sequentially from the outside to the inside, the support retaining rings having inlets for connecting adjacent screening channels, and the outermost screening channel having an initial inlet for receiving materials; a vibrating motor for generating a spiral vibration trajectory for the materials is installed at the bottom of the support base, and the screen is located between the vibrating motor and the support frame.

[0007] As a preferred embodiment of the present invention, the feed inlets on the support ring are staggered, and the plurality of feed inlets from the outside to the inside are progressively advanced layer by layer along the spiral movement direction of the material, and the bottom height of the feed inlets is not higher than the highest height of the screening channel.

[0008] As a preferred embodiment of the present invention, the vibration motor generates a three-dimensional composite excitation force that simultaneously causes horizontal, vertical and tilting vibrations on the support frame.

[0009] As a preferred embodiment of the present invention, the support frame includes a screening chassis and a plurality of support bars arranged around the circumference of the screening chassis, with the screening chassis located in the middle of the support frame.

[0010] As a preferred embodiment of the present invention, the support frame further includes a fixing ring and a number of connecting rings for simultaneously connecting a number of support bars. The fixing ring is connected to the ends of a number of support bars at the same time, the number of connecting rings is located between the fixing ring and the screening chassis, and a number of support retaining rings are disposed on the corresponding number of connecting rings.

[0011] As a preferred embodiment of the present invention, the support retaining ring is formed with a bent structure for increasing the initial feed space.

[0012] In a preferred embodiment of the present invention, the screening channel is an annular channel formed on the support frame, and the screening channel slopes downward from the outside to the inside, with the support retaining ring located on the outer ring of the connecting ring.

[0013] As a preferred embodiment of the present invention, a positioner for centering the support frame and the screen is installed in the middle of the screening chassis.

[0014] As a preferred embodiment of the present invention, the vibration motor is provided with a vibration transmission rod arranged along the length direction of the support bar.

[0015] As a preferred embodiment of the present invention, the cross-section of the supporting frame is circular or non-circular.

[0016] Compared with existing technologies, by setting a support base with a conical structure that slopes downwards from the outside to the inside, the spiral vibration trajectory generated by the vibrating motor on the material is converted into a circular vibration trajectory within the screening channel under the action of the conical structure and the weight of the material itself. Under the action of the feed inlet, the material is fed layer by layer, and the material is screened layer by layer in multiple screening channels. This greatly increases the screening area of ​​the screen during the screening process, improves the screen utilization rate, and the screen is connected by the support frame, which greatly increases the weight of the material that the screen can bear, thus meeting the requirements for effective screening of heavy materials. During the screening process, a vibrating motor drives the material to move in a vibrating manner within the screening channel. Combined with a conical support frame, this ensures that the material remains within the inner ring of the screening channel. When the material accumulates to a certain amount within the screening channel, it enters the next screening channel from the feed inlet under its own gravity, thus ensuring the screening effect of a single screening channel. Attached Figure Description

[0017] Figure 1 This is a top view of the present invention; Figure 2 This is a schematic diagram of the supporting skeleton; Figure 3 This is the main view supporting the skeleton; Figure 4 It is a bottom view of the supporting skeleton; Reference numerals: 1. Support frame; 2. Screen; 3. Support base; 31. Screening chassis; 32. Fixing ring; 33. Connecting ring; 34. Support bar; 35. Initial feed inlet; 4. Support retaining ring; 41. Feed inlet; 42. Bending structure; 5. Screening channel; 6. Positioner; 7. Vibration motor; 71. Vibration transmission rod. Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0019] like Figures 1-4 As shown, a conical internal spiral high-frequency vibrating screen includes a support frame 1 and a screen 2 installed at the bottom of the support frame 1. The support frame 1 includes a support base 3 and a plurality of support retaining rings 4 formed on the support base 3. The plurality of support retaining rings 4 are concentrically arranged around the center of the support base 3. The plurality of support retaining rings 4 divide the support base 3 into a plurality of screening channels 5 arranged sequentially from the outside to the inside. The support retaining rings 4 have inlet ports 41 for connecting adjacent screening channels 5, and the outermost screening channel 5 has an initial feed port 35 for receiving materials. A vibrating motor 7 is installed at the bottom of the support base 3 for driving the materials to move in a high-frequency vibrating motion along the length direction of the screening channel 5. The screen 2 is located between the vibrating motor 7 and the support frame 1.

[0020] The screen 2 is fixedly connected to the lower surface of the support base 3 by welding. Under the action of the screening channel 5, the screen 2 is divided from the outside to the inside. Under the action of the support retaining ring 4, each screening channel 5 is independently divided. At the same time, each support retaining ring 4 has only one single feed port 41. Under the action of the feed port 41, the adjacent screening channels 5 are connected. The material moves under the action of the vibrating motor 7. Under the action of the feed port 41, the material in the outer ring can only enter the adjacent inner ring screening channel 5 through the feed port 41. As the material passes through each feed port 41 in sequence, and after the material passes through multiple screening channels 5 from the outside to the inside in sequence, the movement path of the material on the screen 2 is increased, and the screen 2 effectively screens the material.

[0021] The feed inlets 41 on several support rings 4 advance backward in circles from the outside to the inside along the high-frequency vibration movement direction of the material, and the bottom of the feed inlet 41 is flush with the highest point of the adjacent screening channel 5 on the outer ring.

[0022] The initial feed port 35 of the material is located behind the high-frequency vibration movement direction of the material. Thus, under the action of the vibration motor 7 driving the material to move along the screening channel 5, the material needs to move one circle in the corresponding screening channel 5 before it can enter the inner screening channel 5 through the feed port 41. The feed ports 41 on several support rings 4 are advanced backward circle by circle from the outside to the inside along the high-frequency vibration movement direction of the material, ensuring that the material needs to move one circle in the corresponding screening channel 5 before it can enter the next inner screening channel 5 through the feed port 41, which greatly improves the surface utilization rate of the screen 2.

[0023] The bottom height of the feed inlet 41 is not higher than the maximum height of the screening channel 5, ensuring that there is always a certain amount of material in the screening channel 5 during the screening process. Only when the amount of material in the screening channel 5 exceeds the rated amount will it enter the lower screening channel 5 through the feed inlet 41.

[0024] In actual use, the material is initially fed into the outermost screening channel 5. Under the action of the vibration motor 7, the material is driven to move along the length of the screening channel 5. Under the action of the cone-shaped support frame 1, it is ensured that the material is always in the inner circle of the screening channel 5 during the movement. When the material accumulates to a certain amount in the screening channel 5, the material in the screening channel 5 will enter the next screening channel 5 through the feed port 41.

[0025] The support frame 1 has a tapered structure that slopes downwards from the outside to the inside. Several support rings 4 are vertically set on the support frame 1. Under the action of the tapered support frame 1, the material slides towards the middle of the support frame 1 under its own gravity, ensuring that the material is always in the inner circle of the screening channel 5 during the movement, and also satisfying the requirement that the material enters the inner circle screening channel 5 through the outer circle screening channel 5.

[0026] The support frame 1 includes a screening base 31 and several support bars 34 arranged around the circumference of the screening base 31. The screening base 31 is located in the middle of the support frame 1.

[0027] The screening base 31 is located at the lowest point of the conical support frame 1. Several support bars 34 extend outward along the circumferential direction of the screening base 31. The support bars 34 are inclined according to the conical structure required by the support frame 1. The number of support bars 34 is set according to actual needs, and the support bars 34 are evenly distributed.

[0028] The support frame 1 also includes a fixing ring 32 and a connecting ring 33 for simultaneously connecting a plurality of support bars 34. The fixing ring 32 is connected to the ends of the plurality of support bars 34, the plurality of connecting rings 33 are located between the fixing ring 32 and the screening base 31, and a plurality of support retaining rings 4 are disposed on the corresponding plurality of connecting rings 33.

[0029] The fixing ring 32 is located at the outermost ring of the support frame 1. Both the connecting ring 33 and the fixing ring 32 are circular ring structures, and the connecting ring 33, the fixing ring 32 and the support bar 34 are integrated structures. The connecting ring 33, the fixing ring 32 and the support bar 34 are all fixedly connected to the screen 2 by welding. Under the contact action between the connecting ring 33, the fixing ring 32 and the support bar 34 and the screen 2, effective support for the screen 2 is achieved.

[0030] The screen 2 can effectively support heavy materials under the support of the connecting ring 33, the fixed ring 32 and the support bar 34. The connecting ring 33 and the fixed ring 32 are used to effectively support the support bar 34. The connecting ring 33 is used in conjunction with the support retaining ring 4. The number and position of the connecting ring 33 are set according to the actual number and position of the support retaining ring 4.

[0031] An initial feed opening 35 is formed between the fixed ring 32 and the adjacent support ring 4, and the support ring 4 has a bent structure 42 for increasing the feeding space of the initial feed opening 35. The initial feed opening 35 is located on the outermost ring of the support frame 1. The bent structure 36 is a concave structure formed in the support ring 4. Under the action of the bent structure 36, the distance between the bent structure 36 of the support ring 4 and the fixed ring 32 increases, thereby expanding the material feeding and initial accumulation position. Combined with the screen 2 being stably set under the support of the connecting ring 33, the fixed ring 32 and the support bar 34, it can meet the effective accumulation of heavy materials in the initial feed opening 35.

[0032] The screening channel 5 is an annular channel formed on the support frame 1, and the screening channel 5 is inclined downward from the outside to the inside. The support retaining ring 4 is located on the outer ring of the connecting ring 33. The screen 2 at the bottom of the screen channel 5 is inclined downward from the outside to the inside. Thus, within the screening channel 5 at a certain interval, the inclined screen 2 has a better screening area, which can meet the requirement of screening more materials within the screening channel 5 at a certain interval.

[0033] A positioner 6 is installed in the middle of the screening chassis 31 to center the support frame 1 and the screen 2. The positioning head of the positioner 6 passes through the screening chassis 31 and limits the center of the screening chassis 31 under the action of the positioning head to ensure the stability of the screening chassis 31 during vibration.

[0034] The vibrating motor 7 is provided with a vibration transmission rod 71 arranged along the length of the support bar 34. The vibration transmission rod 71 is used to transmit the vibration frequency transmitted by the vibrating motor 7, and the vibration transmission rod 71 is in contact with the bottom surface of the screen 2. Under the vibration action of the vibration transmission rod 71, the screen 2 is driven to vibrate, thereby controlling the movement direction of the material.

[0035] By controlling the high-frequency reciprocating vibration of the vibration motor 7 along the annular tangential direction, the vibration motor 7 drives the support frame 1 to perform a periodic "clockwise-reset-clockwise" motion, thereby driving the material to move clockwise and satisfying the material's need to move on the screen 2.

[0036] The vibration motor 7 generates a three-dimensional composite excitation force that simultaneously vibrates horizontally, vertically, and tiltingly on the support frame 1. At both ends of the output shaft of the vibration motor 7, a set of adjustable-angle eccentric blocks are installed, namely the upper eccentric block and the lower eccentric block. When the motor is powered on and rotates, the upper and lower eccentric blocks generate centrifugal force due to the uneven mass distribution, which is the excitation force on the support frame 1. The centrifugal forces of the upper and lower eccentric blocks are combined in space to form a three-dimensional composite excitation of "horizontal + vertical + tilting".

[0037] The magnitude of the excitation force can be adjusted by adjusting the weight or relative angle of the eccentric blocks. The smaller the angle between the upper and lower eccentric blocks and the vertical direction, the greater the angle at which the upper and lower eccentric blocks are tilted, resulting in a greater combined excitation force and stronger screening force. Conversely, the larger the angle, the gentler the excitation force, which is suitable for fine screening and thus meets the screening requirements of different materials.

[0038] The horizontal vibration generated by the vibrating motor 7 drives the support frame 1 to perform circumferential vibration, which is used to spread the material on the screen 2, thereby expanding the coverage area of ​​the material on the screen 2 and avoiding local accumulation.

[0039] The vertical vibration generated by the vibrating motor 7 drives the screen to vibrate up and down, generating a "throwing force" that periodically throws the material up, causing the material particles to separate from each other and become loosely layered (large particles on top and small particles on the bottom).

[0040] The tilting vibration generated by the vibrating motor 7 is formed by the angle difference between the upper and lower eccentric blocks, which drives the material to move slowly in the direction set.

[0041] During the movement of materials, the support ring 4 plays a role in supporting, limiting and guiding the materials.

[0042] The vibrating motor 7 is suspended in the air by a bracket, and the vibration transmission rod 71 comes into contact with the screen 2 during vibration, thereby driving the screen 2 to vibrate synchronously.

[0043] The cross-section of the support frame 1 can be circular or non-circular. The structure of the cross-section of the support frame 1 can be set according to actual needs, and can be circular, square or irregular, with a circular structure being preferred.

[0044] In actual use, the entire screen body is installed inside the material cylinder, with the inner wall of the material cylinder abutting against the outer wall of the screen body. After installation, the material to be screened is fed into the initial material inlet 35 and piled up. Under the vibration of the vibrating motor 7, the material moves along the length of the screening channel 5.

[0045] Under the vibration of the vibrating motor 7, the bottom of the pile of material located at the initial feed port 35 is rubbed by the screen 2 and screened on the screen 2 under the vibration of the vibrating motor 7. Under the vibration of the vibrating motor 7, the pile of material is decomposed and moves along the length of the screening channel 5 until the pile of material is evenly spread in the screening channel 5 corresponding to the initial feed port 35.

[0046] Under the limiting and supporting effect of the conical support frame 1 and the support retaining ring 4, the material is always located in the inner circle of the screening channel 5 and abuts against the support retaining ring 4 corresponding to the inner circle of the screening channel 5. During the process of the material moving along the length of the screening channel 5, the material comes into contact with the screen 2 at the screening channel 5, so that the material is fully screened on the screen 2 of the screening channel 5.

[0047] As the material is gradually fed in, the material height in the outermost screening channel 5 gradually increases until the material accumulation in the corresponding screening channel 5 reaches the lowest point of the corresponding feed inlet 41, which means that the material overflows the corresponding feed inlet 41 at this time.

[0048] Material overflowing the corresponding feed inlet 41 enters the next inner screening channel 5 through the feed inlet 41. Similarly, it is vibrated by the vibration motor 7, causing the material to accumulate in the inner circle of the corresponding screening channel 5. During the vibration process, the material is screened on the screen 2 as it moves forward, until the material accumulation in the screening channel 5 reaches the lowest point of the corresponding feed inlet 41. Material overflowing the corresponding feed inlet 41 then enters the next inner screening channel 5 through the feed inlet 41.

[0049] Repeat the above operation until the material enters the screening chassis 31 through the innermost feed port 41, so that the material passes through each screening channel 5 in sequence, thereby greatly increasing the usable area of ​​the screen 2 and achieving effective screening of the material.

[0050] The material can be selected according to actual needs. Assuming the material is wheat, the wheat bran needs to be removed during the screening process. After the wheat passes through each screening channel 5 in sequence, it falls through the screen 2. The bran is supported by the screen 2 or moves into the screening base 31. The vibrating motor 7 vibrates the screen 2, causing the bran to detach from the surface of the screen 2. The suction device is used to suction the bran in the screen 2 and the screening base 31, thus cleaning the entire vibrating screen.

[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0052] Although this document uses numerous reference numerals from the accompanying drawings—such as support frame 1, screen 2, support base 3, screening chassis 31, fixing ring 32, connecting ring 33, support bar 34, initial feed inlet 35, support retaining ring 4, feed inlet 41, bending structure 42, screening channel 5, positioner 6, vibration motor 7, and vibration transmission rod 71—the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A conical internal spiral high-frequency vibrating screen, comprising a support frame (1) and a screen (2) installed at the bottom of the support frame (1); characterized in that, The support frame (1) includes a support base (3) and a plurality of support retaining rings (4) formed on the support base (3). The support base (3) has a cone-shaped structure that slopes downward from the outside to the inside. The plurality of support retaining rings (4) are concentrically arranged at the center of the support base (3). The plurality of support retaining rings (4) divide the support base (3) into a plurality of screening channels (5) arranged sequentially from the outside to the inside. The support retaining rings (4) have inlets (41) for connecting adjacent screening channels (5), and the outermost screening channel (5) has an initial inlet (35) for receiving materials. The bottom of the support base (3) is equipped with a vibration motor (7) for generating a spiral vibration trajectory of the material. The screen (2) is located between the vibration motor (7) and the support frame (1).

2. The conical internal spiral high-frequency vibrating screen according to claim 1, characterized in that, The feed inlets (41) on the support rings (4) are staggered, and the feed inlets (41) from the outside to the inside are progressively advanced layer by layer along the spiral movement direction of the material, and the bottom height of the feed inlet (41) is not higher than the highest height of the screening channel (5).

3. The conical internal spiral high-frequency vibrating screen according to claim 1, characterized in that, The vibration motor (7) generates a three-dimensional composite excitation force that simultaneously vibrates horizontally, vertically, and tiltingly on the support frame (1).

4. The conical internal spiral high-frequency vibrating screen according to claim 1, characterized in that, The support frame (1) includes a screening chassis (31) and a number of support bars (34) arranged around the circumference of the screening chassis (31). The screening chassis (31) is located in the middle of the support frame (1).

5. A conical internal spiral high-frequency vibrating screen according to claim 4, characterized in that, The support frame (1) also includes a fixing ring (32) and a connecting ring (33) for simultaneously connecting a plurality of support bars (34). The fixing ring (32) is connected to the ends of a plurality of support bars (34) at the same time. The connecting ring (33) is located between the fixing ring (32) and the screening chassis (31). A plurality of support retaining rings (4) are set on the corresponding connecting rings (33).

6. A conical internal spiral high-frequency vibrating screen according to claim 5, characterized in that, The initial feed port (35) is located between the fixed ring (32) and the adjacent support ring (4), and the support ring (4) has a bent structure (42) for increasing the feed space of the initial feed port (35).

7. A conical internal spiral high-frequency vibrating screen according to claim 5, characterized in that, The screening channel (5) is an annular channel formed on the support frame (1), and the screening channel (5) is inclined downward from the outside to the inside, and the support retaining ring (4) is located on the outer ring of the connecting ring (33).

8. A conical internal spiral high-frequency vibrating screen according to claim 6, characterized in that, The screening chassis (31) is equipped with a locator (6) for center positioning of the support frame (1) and the screen (2).

9. A conical internal spiral high-frequency vibrating screen according to claim 4, characterized in that, The vibration motor (7) is provided with a vibration transmission rod (71) arranged along the length of the support bar (34).

10. A conical internal spiral high-frequency vibrating screen according to claim 1, characterized in that, The cross-section of the supporting frame (1) is either circular or non-circular.

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