Vibratory centrifuge with screening function

Abstract

This utility model relates to the field of centrifuge technology, and provides a vibrating centrifuge with screening function. It includes a casing and a screen basket rotatably disposed within the casing for material dewatering. It also includes a feed pipe and a screening component. The feed pipe is detachably mounted on the casing and has a discharge port located inside the screen basket. The feed pipe is used to convey material into the screen basket. The screening component is detachably mounted on the feed pipe and located in the middle of the screen basket. After the screen basket rotates, the screening component can catch and screen material falling from a height in the screen basket, allowing large-diameter materials to fall onto the screening component. By detachably mounting the screening component on the feed pipe, large pieces of material fall onto the screening component and are subsequently discharged from the casing, preventing materials exceeding the particle size limit from continuing to move in the screen basket, thus avoiding accelerated wear and abnormal damage to the screen basket.

Description

Technical Field

[0001] This utility model relates to the field of centrifuge technology, specifically to a vibrating centrifuge with sieving function. Background Technology

[0002] In my country, over 90% of coal washing and processing utilizes water washing technology. As the moisture content of coal products is a crucial standard for evaluating their quality and price, the coal dehydration process is becoming increasingly important. With domestic coal preparation plants transitioning towards larger-scale and modular designs, horizontal vibrating centrifuges offer advantages over vertical scraper discharge centrifuges, including larger processing capacity, fewer vulnerable parts, and lower installation space requirements.

[0003] However, the current design limit for the feed particle size of horizontal vibrating centrifuges is 50mm. With the increasing scale of coal washing plants and continuous process upgrades, the application scenarios of horizontal vibrating centrifuges are becoming more diversified, and the upper limit of the feed particle size and processing capacity can no longer meet production needs. During operation, due to the poor crushing effect of the upstream crusher, incompletely crushed materials directly enter the horizontal vibrating centrifuge. As a result, the content of large-sized materials in the material entering the horizontal vibrating centrifuge will be very high, leading to the feed particle size exceeding the limit, causing accelerated wear or abnormal damage to the screen basket. Utility Model Content

[0004] To overcome the above-mentioned defects, this utility model provides a vibrating centrifuge with screening function, which solves the technical problem of wear of the screen basket of horizontal vibrating centrifuge caused by excessive feed particle size in the prior art.

[0005] According to one aspect, at least one embodiment of the present invention provides a vibrating centrifuge with a screening function, comprising a casing and a screen basket rotatably disposed within the casing for dewatering materials, and further comprising: The feed pipe is detachably mounted on the machine housing and has a discharge port located inside the screen basket. The feed pipe is used to convey materials into the screen basket. The screening component is detachably mounted on the feed pipe and located in the middle of the screen basket. After the screen basket drives the material to rotate, the screening component can receive and screen the material falling from the height of the screen basket to collect large-diameter materials.

[0006] Optionally, the screening element includes: Mounting ring, which is detachably mounted on the outer wall of the feed pipe; A comb plate has a mounting through hole in the middle, a mounting ring is located in the mounting through hole, and the outer wall of the comb plate is fixedly connected to the mounting ring. The comb plate is sleeved on the feed pipe through the mounting ring, and the discharge port is located below the comb plate.

[0007] Optionally, the housing is provided with a door, and the housing is provided with a discharge port on the side near the bottom of the door. The comb plate is inclined downward from the side away from the door and extends towards the discharge port. The comb plate can discharge the material out of the housing through the discharge port.

[0008] Optionally, both sides of the comb plate have material passage gaps with the inner sides of the screen basket. After the screen basket rotates, the material passage gaps are used to allow material to pass through, so that the material enters above the comb plate.

[0009] Optionally, the comb plate includes a first plate and a second plate, which are arranged symmetrically about the axis of the mounting through hole. Both the first plate and the second plate are inclined downward from the side wall of the screen basket toward the axis of the mounting ring to gather large-diameter materials screened out.

[0010] Optionally, the mounting ring has an opening, and a connecting block is provided on the outer wall of the mounting ring near the opening in the circumferential direction. A fastener is provided on the connecting block, and the fastener is used to fix the mounting ring to the feed pipe.

[0011] Optionally, the outer wall of the feed pipe is provided with an mounting plate, and the feed pipe is detachably connected to the door body through the mounting plate.

[0012] Optionally, the cross-section of the screen basket is an isosceles trapezoid, and the diameter of the screen basket gradually increases from the side away from the door body to the discharge port.

[0013] Optionally, the fastener is a bolt and nut.

[0014] Optionally, the first plate and the second plate have the same structure, and the first plate includes: A grid of bars, wherein there are a plurality of grid bars arranged at intervals; A connecting strip is disposed on a plurality of the grid bars and is used to fix the grid bars together.

[0015] The beneficial effects of the embodiments of this utility model are as follows: In this invention, material enters the screen basket through the feed pipe for dewatering. The material rotates with the screen basket. When it reaches the top of the screen basket, large pieces of material fall onto the screening components due to their own weight and the vibration of the centrifuge. A small portion of smaller pieces also fall onto the screening components. At this point, the screening components begin to separate the large and smaller pieces. The large pieces remain on the screening components and are discharged through the discharge port, while the smaller pieces return to the screen basket through the gaps in the screening components to continue the dewatering process. This invention utilizes the screening components to screen out and discharge large pieces of material, avoiding the direct impact of large pieces falling onto the screen basket when they reach the top area, and preventing the aggravated wear and abnormal damage to the screen basket caused by tumbling on the inner wall below. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a vibrating centrifuge with screening function in one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the centrifuge screen basket and screen components in the embodiment; Figure 3 for Figure 1 A schematic diagram of the structure of the screening component in the embodiment; Figure 4 for Figure 1 A schematic diagram of the installation structure of the feed pipe and comb plate in the embodiment; Figure 5 for Figure 4 A magnified view of a section at point A in the middle; Figure 6 for Figure 1 The embodiment is shown in the bottom view of the casing discharge port.

[0018] In the diagram: 1. Machine casing; 101. Discharge port; 2. Screen basket; 3. Feed pipe; 301. Discharge port; 4. Screening component; 41. Comb plate; 42. Mounting ring; 411. First plate; 4111. Grid bar; 4112. Connecting bar; 412. Second plate; 5. Door; 6. Fastener; 7. Mounting plate. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0020] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0021] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] like Figures 1-6The diagram illustrates a vibrating centrifuge with screening function according to an embodiment of the present invention. It includes a housing 1 and a screen basket 2 rotatably disposed within the housing 1 for dewatering coal blocks. Taking coal blocks as an example, the centrifuge also includes a feed pipe 3 and a screening component 4. The feed pipe 3 is detachably mounted on the housing 1 using bolts and nuts. The feed inlet of the feed pipe 3 is connected to the discharge section of the vibrating screen, or it can be connected to a conveyor belt transporting the screened coal blocks. The screened coal blocks enter the vibrating centrifuge through the feed pipe 3. Specifically, the feed pipe 3 has a discharge port 301, which is inclinedly inserted into the screen basket 2 and located below the screening component 4. The screening component 4 is detachably mounted on the feed pipe 3 and located in the middle of the screen basket 2. After the screen basket 2 rotates, the coal blocks are carried to a higher position in the screen basket 2 by the centrifugal force. At this time, the coal blocks are carried above the screening component 4. Then, under the action of gravity, large and relatively large coal blocks fall from the higher position of the screen basket 2 and fall onto the screening component 4. Due to the screening function of the screening component 4, coal blocks larger than the upper limit of particle size fall onto and remain on the screening component 4, while coal blocks smaller than the upper limit of particle size fall through the gaps in the screening component 4 into the screen basket 2 to continue dewatering. The above steps are repeated until the dewatering work is completed. It should be noted that both the feed pipe 3 and the screening component 4 are detachable, which facilitates the selection of a suitable screening component 4 and also facilitates the regular cleaning of clogged coal blocks or the replacement of worn parts, reducing maintenance costs.

[0026] Specifically, most small coal pieces will not fall onto the screen 4; only a small portion will be carried onto the screen 4 by larger coal pieces, and then fall back into the screen basket 2 through the gaps in the screen 4 to continue dehydration.

[0027] It is understood that the horizontal centrifuge of this application has the same opening direction as the traditional horizontal centrifuge. The structure of the drive part and transmission part of the horizontal centrifuge will not be described in detail here.

[0028] It should be noted that the feed pipe 3 consists of two cylindrical pipes. The first cylindrical pipe is arranged vertically and detachably installed on the door 5. The housing 1 has an arc-shaped groove to fit the feed pipe. After the door 5 is closed, the feed pipe can fit better against the housing 1, ensuring the overall sealing of the device. Secondly, the second cylindrical pipe is welded obliquely to the first cylindrical pipe, and the discharge port 301 is obliquely inserted into the middle of the screen basket 2 and located below the screening component 4, which facilitates the rapid entry of coal blocks into the screen basket 2.

[0029] Furthermore, such as Figure 3 As shown, in some examples, the screening component 4 includes a mounting ring 42 and a comb plate 41. The mounting ring 42 is detachably mounted on the outer wall of the feed pipe 3. The comb plate 41 has a mounting through hole in the middle, and the mounting ring 42 is disposed in the mounting through hole. The comb plate 41 is sleeved on the feed pipe 3 through the mounting ring 42, and the discharge port 301 is located below the comb plate 41.

[0030] For example, such as Figure 4 As shown, it should be noted that the tooth gaps of the comb plate 41 can be determined according to actual screening requirements. During operation, the screen basket 2 drives the coal blocks to rotate at high speed and generate centrifugal force. During the centrifugal motion of the coal blocks in the screen basket 2, when they move to the area above the comb plate 41, large and relatively large coal blocks will fall onto the comb plate 41 under the action of gravity. According to the particle size screening principle, coal blocks with a particle size smaller than the set value can pass through the tooth gaps of the comb plate 41 because the particle size of the coal blocks is smaller than the tooth gap spacing. Then, under the action of gravity, the coal blocks fall from the tooth gaps and return to the lower surface of the screen basket 2. Again, with the help of the centrifugal force generated by the continuous rotation of the screen basket 2, the dewatering work continues. According to the above screening and dewatering process, the coal blocks can repeat the above steps within a specified time until dewatering is completed, ensuring that small-diameter coal blocks are sufficiently dewatered. In this process, large coal blocks are intercepted by the comb plate 41 and cannot pass through the gaps between the teeth. They are then collected and guided by their own gravity and slide down the surface of the comb plate 41 to the discharge port 101, completing the unloading process. This achieves a continuous process connection between efficient screening, dewatering, and unloading of coarse and fine coal blocks, ensuring the dewatering quality of fine coal blocks and accurately separating and discharging large coal blocks, thus preventing them from accumulating in the screen basket 2 and affecting the equipment's operating efficiency and dewatering effect.

[0031] For example, such as Figure 4 As shown, the mounting ring 42 and the comb plate 41 are welded together. The mounting ring 42 can install the comb plate 41 at any part of the feed pipe 3, but the comb plate 41 can only be inside the screen basket 2. The best position is to place the comb plate 41 in the middle of the inner side of the screen basket 2. Because the mounting ring 42 and the feed pipe 3 are detachably connected, it is convenient to replace the comb plate 41 of different sizes according to different screening requirements.

[0032] Furthermore, a door 5 is provided on the housing 1, and a discharge port 101 is provided on the side of the housing 1 near the door 5. The comb plate 41 is inclined downward from the side away from the door 5 to the discharge port 101, and the coal blocks on the comb plate 41 can be discharged out of the door 5 through the discharge port 101.

[0033] like Figure 2 and Figure 6 As shown, it should be noted that the door body 5 is provided with an observation hole, which is used by the operator to observe the dewatering and screening of the screen basket 2 and the screening component 4. The shape of the observation hole is not limited here. The door body 5 is provided with a cover plate corresponding to the shape of the observation hole. The cover plate is used to seal the observation hole when it is not in use to ensure the airtightness of the device. The lower part of the machine casing 1 is provided with a drain outlet, which is located below the screen basket 2. The drain outlet is used to discharge the water and fine particles thrown out from the screen gap of the screen basket 2 due to centrifugal force, ensuring that the dewatering process is continuous.

[0034] For example, such as Figure 2 As shown, it should be noted that the discharge port 101 is adapted to the shape of the lower part of the casing 1, and an opening is provided below the discharge port 101. A collection bin for collecting all coal pieces is placed below the discharge port 101. Specifically, large coal pieces falling on the comb plate 41 move along the inclined direction of the comb plate 41 to the discharge port 101, and are then collected into the collection bin through the opening below the discharge port 101.

[0035] Furthermore, the discharge port 101 is located in the downward extending direction of the comb plate 41, used for the rapid discharge of large-diameter coal blocks. This prevents large-diameter coal blocks from accumulating on the comb plate 41 for a long time, causing excessive coal accumulation and falling back into the screen basket 2, thus damaging the screen basket 2 again. It also prevents interference with the screening of small-diameter coal blocks. More specifically, when installing the comb plate 41, the comb plate 41 is tilted at 10~30° towards the discharge port 101. The large-diameter coal blocks are driven by the "sliding" component of the longitudinal tilt angle and the vibration force of the vibrating centrifuge, causing the large-diameter coal blocks to accelerate towards the discharge port 101. This facilitates the rapid sliding of large-diameter coal blocks towards and out of the discharge port 101.

[0036] Furthermore, both sides of the comb plate 41 have material passage gaps with the inner sides of the screen basket 2. After the screen basket 2 rotates, the material passage gaps are used for coal blocks to pass through.

[0037] It should be noted that the material passage gap between the two sides of the comb plate 41 and the inner wall of the screen basket 2 allows large-diameter coal blocks entering the screen basket 2 to also pass through the material passage gap and enter the area above the comb plate 41 without affecting the dewatering of the coal blocks.

[0038] The comb plate 41 includes a first plate body 411 and a second plate body 412. The first plate body 411 and the second plate body 412 are arranged symmetrically about the axis of the mounting through hole. Both the first plate body 411 and the second plate body 412 are axially inclined towards the mounting ring 42 to gather the screened coal blocks.

[0039] For example, such as Figure 3 and Figure 4 As shown, the comb plates 41 on both the left and right sides are inclined inward at an angle of 5 to 15 degrees. When large coal blocks are received by the comb plates 41, due to the inward inclination function of the lateral inclination angle, the coal blocks will automatically gather towards the center of the comb plates 41, preventing them from scattering to the sides and returning to the surface of the screen basket 2. If they scatter back to the surface of the screen basket 2, they will re-enter the screening process.

[0040] Furthermore, the mounting ring 42 is circular and has an opening. The mounting ring 42 can be a clamp or two interlocking semi-circular plates. Specifically, taking a semi-circular plate as an example, the two openings of the mounting ring 42 divide the mounting ring 42 into two equal semicircles, and a connecting block is provided at the opening on the outer wall of each semicircle. To ensure that the comb plate 41 and the feed pipe 3 can be relatively fixed, fasteners 6 are provided on the connecting blocks. The fasteners 6 are bolts and nuts. A circular through hole adapted to the bolt is opened on the mounting ring 42 so that the fasteners 6 can lock the comb plate 41 and the feed pipe 3 outlet 301 through the circular through hole. Since the coal blocks fall from the height of the screen basket 2 onto the comb plate 41, the mounting ring 42 and the comb plate 41 are fastened to the feed pipe 3 by fasteners 6. This prevents the comb plate 41 from shifting with the feed pipe 3 during operation of the device, thereby preventing the comb plate 41 from falling into the screen basket 2 and affecting the normal operation of the screen basket 2. In addition, the fasteners 6 make it convenient to replace the comb plate 41 with different tooth gap sizes according to different application scenarios.

[0041] Furthermore, the outer wall of the feed pipe 3 is provided with an installation plate 7, and the top of the door body 5 is provided with a groove for installing the feed pipe 3. The feed pipe 3 is detachably connected to the door body 5 through the installation plate 7.

[0042] For example, such as Figure 4 As shown, it should be noted that the mounting plate 7 is set on the outer wall of the feed pipe 3 along the axial direction of the vertical section of the feed pipe 3, and the mounting plate 7 is rectangular. Several circular through holes are evenly spaced around the mounting plate 7. Additionally, the groove is located at the upper center of the door body 5 and is a U-shaped groove with an upward opening that fits the shape of the feed end of the feed pipe 3. Circular through holes of the same size and corresponding to the circular through holes on the mounting plate 7 are formed around the groove to facilitate the connection of the mounting plate 7 to the door body 5 using bolts and nuts. The mounting plate 7 is also easily replaceable using bolts and nuts.

[0043] Furthermore, the cross-section of the screen basket 2 is an isosceles trapezoid, and the diameter of the screen basket 2 gradually increases from the side away from the door body 5 to the discharge port 101.

[0044] For example, such as Figure 2 As shown, it should be noted that the screen basket 2 is generally truncated cone-shaped, with the larger diameter end close to the door 5. The screen basket 2 is rotatably mounted inside the casing 1 via a rotating seat. The rotating seat is connected to the power output end of the centrifuge's drive unit. The screen basket 2 and the rotating seat can be connected in a detachable manner, such as by bolts or snap-fit, to facilitate replacement of the screen basket 2. Furthermore, the comb plate 41 is also an isosceles trapezoid in shape to ensure that the comb plate 41 can enter the screen basket 2. However, the cross-sectional area of ​​the comb plate 41 is smaller than the cross-sectional area of ​​the screen basket 2, so that a material passage gap is formed between the side walls of the comb plate 41 and the inner side walls of the screen basket 2.

[0045] Furthermore, the first plate 411 and the second plate 412 have the same structure, and the first plate 411 and the second plate 412 are symmetrically distributed along the mounting through holes. The first plate 411 includes grid bars 4111 and connecting bars 4112: the grid bars 4111 are the basic functional components of the first plate 411, and several of them are provided, and they are arranged at regular intervals along a set spacing. These grid bars 4111 are long strips, and the material must have high strength and wear resistance, and their length should be slightly less than the internal radial length of the screen basket 2; the connecting bars 4112 extend in a direction perpendicular to the grid bars 4111 and are placed horizontally on several grid bars 4111, and are connected to the grid bars 4111 by welding. The connecting bars 4112 and the grid bars 4111 are an integral structure, used to fix and connect several grid bars 4111.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vibrating centrifuge with screening function, comprising a casing (1) and a screen basket (2) rotatably disposed within the casing (1) for dewatering materials, characterized in that, Also includes: Feed pipe (3), the feed pipe (3) is detachably mounted on the housing (1), the feed pipe (3) has a discharge port (301), the discharge port (301) is located inside the screen basket (2), the feed pipe (3) is used to convey materials into the screen basket (2); Screening component (4) is detachably mounted on the feed pipe (3) and located in the middle of the screen basket (2). After the screen basket (2) drives the material to rotate, the screening component (4) can receive and screen the material falling from the height of the screen basket (2) to collect large-diameter materials.

2. The vibrating centrifuge with sieving function according to claim 1, characterized in that, The screening component (4) includes: Mounting ring (42), which is detachably mounted on the outer wall of the feed pipe (3); The comb plate (41) has a mounting through hole in the middle, the mounting ring (42) is located in the mounting through hole, and the outer wall of the comb plate (41) is fixedly connected to the mounting ring (42). The comb plate (41) is sleeved on the feed pipe (3) through the mounting ring (42), and the discharge port (301) is located below the comb plate (41).

3. The vibrating centrifuge with sieving function according to claim 2, characterized in that, The housing (1) is provided with a door (5), and the housing (1) is provided with a discharge port (101) on the side near the bottom of the door (5). The comb plate (41) is inclined downward from the side away from the door (5) to the discharge port (101) and extends towards the discharge port (101). The comb plate (41) can discharge the material out of the housing (1) through the discharge port (101).

4. The vibrating centrifuge with sieving function according to claim 2, characterized in that, Both sides of the comb plate (41) have material passage gaps with the inner sides of the screen basket (2). After the screen basket (2) rotates, the material passage gaps are used to pass materials so that the materials enter above the comb plate (41).

5. The vibrating centrifuge with sieving function according to claim 4, characterized in that, The comb plate (41) includes a first plate (411) and a second plate (412). The first plate (411) and the second plate (412) are arranged symmetrically about the axis of the mounting through hole. The first plate (411) and the second plate (412) are both inclined downward from the side wall of the screen basket (2) toward the axis of the mounting ring (42) to gather the large-diameter material screened out.

6. The vibrating centrifuge with sieving function according to claim 5, characterized in that, The mounting ring (42) has an opening, and a connecting block (421) is provided on the outer wall of the mounting ring (42) near the opening. A fastener (6) is provided on the connecting block (421), and the fastener (6) is used to fix the mounting ring (42) to the feed pipe (3).

7. The vibrating centrifuge with sieving function according to claim 3, characterized in that, The feed pipe (3) is provided with an installation plate (7) on its outer wall, and the feed pipe (3) is detachably connected to the door body (5) through the installation plate (7).

8. The vibrating centrifuge with sieving function according to claim 3, characterized in that, The cross-section of the sieve basket (2) is an isosceles trapezoid, and the diameter of the sieve basket (2) gradually increases from the side away from the door body (5) to the discharge port (101).

9. The vibrating centrifuge with sieving function according to claim 6, characterized in that, The fastener (6) is a bolt and nut.

10. The vibrating centrifuge with sieving function according to claim 5, characterized in that, The first plate (411) and the second plate (412) have the same structure. The first plate (411) includes: A grid bar (4111), wherein there are a plurality of grid bars (4111), and the plurality of grid bars (4111) are arranged at intervals; A connecting strip (4112) is disposed on a plurality of the grid strips (4111) and is used to fix the grid strips (4111).

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