Scraper of horizontal centrifuge and horizontal centrifuge

Abstract

A scraper of a horizontal centrifuge comprises a flange plate, an inner cone coaxially aligned with the flange plate, a flow guide cone connected into the inner cone and blades arranged on the periphery of the inner cone and connected with the flange plate and the inner cone, and a discharging port located in the front side of the flow guide cone is formed between the inner cone and the flange plate. The scraper is characterized in that the flange plate is composed of an outer plate, an inwards-concave conical plate and an inner plate which are integrally formed from outside to inside in the radial direction, the outer plate and the inner plate are both arranged in the radial direction of the scraper, the outer plate is close to the small head end of the screen basket, the inwards-concave conical plate is an inwards-concave conical plate, and the inner plate and the outer plate are staggered in the radial direction and are not aligned. The gap between the flange plate and the small end of the sieve basket is reduced, the abrasion of the sieve basket is reduced, the service life of the sieve basket is prolonged, the effective dehydration area of the sieve basket is increased, and the dehydration rate is improved; the width of the discharge port can be effectively increased, the fluidity of coal slime is accelerated, the coal slime handling capacity is improved, energy consumption is reduced, and the service life of a driving motor is prolonged. The utility model further provides a horizontal centrifuge.

Description

Technical Field

[0001] The utility model relates to a scraper of a horizontal centrifuge and a horizontal centrifuge, belonging to the technical field of horizontal centrifuges. Background Art

[0002] Centrifuges are essential equipment for coal washing, and centrifuge basket scrapers are key components of coal washing plants. These scrapers are typically installed inside the centrifuge basket. During operation, material enters the scraper's inner cone through a feed pipe and then flows through the scraper's outlet into the inner cavity of the basket mesh. Under the influence of the centrifugal force, liquids are ejected from the mesh, while solids remain within and are quickly scraped out by the scraper blades. This entire process occurs continuously, achieving continuous solid-liquid separation.

[0003] At present, the scraper of large horizontal scraper centrifuge is a welded structure of flange, inner cone, guide cone, blade and reinforcement ring. The flange of the scraper is round and flat, such as Figure 1 As shown in the figure, after being assembled, the gap L between the flange of the scraper and the end face of the small end of the screen basket is too large, resulting in the following problems:

[0004] 1. The coarse coal slime is thrown out from between the blades to the small end of the screen basket. The inner surface of the small end of the screen basket wears quickly, resulting in a shortened service life of the screen basket.

[0005] 2. The gap L between the flange and the small end of the screen basket is too large, resulting in low utilization of the small end of the screen basket during operation, reducing the effective dehydration area of ​​the screen basket and affecting the dehydration rate.

[0006] 3. During the continuous production process, coal slime can easily enter the gap between the flange and the small end of the screen basket. If the equipment is not cleaned regularly, when the accumulated coal hardens to a certain extent, the equipment's rotation torque will be too large, increasing the equipment's motor load, increasing energy consumption, and shortening the motor's service life. Utility Model Content

[0007] The scraper for a horizontal centrifuge provided by the utility model reduces the gap between the flange and the small end of the screen basket, thereby reducing wear on the screen basket, extending the life of the screen basket, increasing the effective dehydration area of ​​the screen basket, and improving the dehydration rate. It can also effectively increase the width of the discharge port, accelerate the fluidity of the coal slime, increase the coal slime processing capacity, and reduce the load on the drive motor, reducing energy consumption and extending the life of the drive motor. The utility model also provides a horizontal centrifuge.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] The scraper of a horizontal centrifuge includes a flange, an inner cone coaxially aligned with the flange, a guide cone connected to the inner cone, and blades arranged on the outer periphery of the inner cone and connecting the flange and the inner cone. A discharge port located in front of the guide cone is formed between the inner cone and the flange. The characteristic is that the flange consists of an outer plate, a concave conical plate and an inner plate integrally formed from the outside to the inside in the radial direction. The outer plate and the inner plate are both arranged along the radial direction of the scraper. The outer plate is close to the small head end of the screen basket. The concave conical plate is an inwardly recessed conical plate, so that the inner plate and the outer plate are radially staggered and misaligned.

[0010] Preferably, the angle between the conical surface of the concave conical disk and the radial direction of the scraper is 15 to 35 degrees.

[0011] Preferably, the blades are straight plate-shaped blades, the number of blades is 8 to 16, and the angle between the blades and the flange is 55 to 70 degrees.

[0012] Preferably, a wear-resistant rib is welded on the inner side of the blade where it is connected to the inner cone. The wear-resistant rib is located at the discharge port, and one end of the rib is welded to the inner cone.

[0013] A horizontal centrifuge comprises a screen basket and a scraper arranged in the screen basket, wherein the scraper is the scraper of the horizontal centrifuge described above.

[0014] The beneficial effects of the utility model are:

[0015] The horizontal centrifugal scraper of the utility model is composed of an outer disk, a concave cone disk and an inner disk. The concave cone disk is a conical disk that is concave inward, so that the inner disk and the outer disk are radially misaligned. The original flat flange is improved to a concave non-flat flange with a concave cone disk, which is equivalent to moving the outer disk closer to the small end of the screen basket, increasing the axial thickness of the flange, and reducing the gap between the flange and the small end of the screen basket. It not only reduces the probability of coarse coal slime entering the small end of the screen basket, but also reduces the wear of the screen basket and extends the life of the screen basket. The concave cone disk can effectively increase the width of the discharge port, and the reduction of the gap between the flange and the small end of the screen basket can effectively prevent the accumulation of large particles of coal slime at the small end of the screen basket, reduce the load of the drive motor, reduce energy consumption, and extend the service life of the drive motor. The coal slime can quickly flow to the discharge port and enter the screen basket mesh surface under the guidance of the concave cone disk, thereby accelerating the fluidity of the coal slime and improving the coal slime processing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the assembly of the screen basket and the scraper in the prior art.

[0017] Figure 2 This is a schematic diagram of a scraper for a horizontal centrifuge of the present invention.

[0018] Figure 3 A top view of the scraper of a horizontal centrifuge.

[0019] Figure 4 This is a schematic diagram of the assembly of the scraper and screen basket of the horizontal centrifuge of the present invention.

[0020] Figure 5 It is a schematic diagram of a horizontal centrifuge of the present invention. DETAILED DESCRIPTION

[0021] The following combination Figures 2 to 5 The embodiments of the present utility model are described in detail.

[0022] The scraper of the horizontal centrifuge includes a flange 1, an inner cone 2 coaxially aligned with the flange 1, a guide cone 3 connected to the inner cone 2, and a blade 4 arranged on the outer periphery of the inner cone 2 and connecting the flange 1 and the inner cone 2. A discharge port 5 located in front of the guide cone 3 is formed between the inner cone 2 and the flange 1, and is characterized in that: the flange 1 consists of an outer disk 11, a concave conical disk 12 and an inner disk 13 integrally formed from the outside to the inside in the radial direction. The outer disk 11 and the inner disk 13 are both arranged along the radial direction of the scraper, the outer disk 11 is close to the small end of the screen basket, and the concave conical disk 12 is an inwardly concave conical disk, so that the inner disk 12 and the outer disk 11 are radially staggered and misaligned.

[0023] The horizontal centrifugal scraper described above, the flange 1 is composed of an outer disk 11, a concave cone disk 12 and an inner disk 13. The concave cone disk 12 is a conical disk that is concave inward, so that the inner disk 12 and the outer disk 11 are radially misaligned. The original flat flange is improved to a concave non-flat flange with a concave cone disk, which is equivalent to moving the outer disk 12 closer to the small end of the screen basket, increasing the axial thickness of the flange 1, and reducing the gap D between the flange 1 and the small end of the screen basket. This not only reduces the probability of coarse coal slime entering the small end of the screen basket, but also reduces the wear of the screen basket. The service life of the screen basket is extended, and the utilization rate of the small end of the screen basket during operation can be improved, which is equivalent to increasing the effective dehydration area of ​​the screen basket and improving the dehydration rate; the conical surface formed by the concave cone disk 12 can effectively increase the width of the discharge port 5, and the reduction in the gap between the flange 1 and the small end of the screen basket can effectively prevent large particles of coal slime from accumulating at the small end of the screen basket, reduce the load of the drive motor, reduce energy consumption, and extend the service life of the drive motor. Under the guidance of the concave cone disk 12, the coal slime can quickly flow to the discharge port 5 and enter the screen basket mesh surface, thereby accelerating the fluidity of the coal slime and improving the coal slime processing capacity.

[0024] The angle α between the concave conical surface of the inner concave conical disk and the radial direction of the scraper is 15 to 35 degrees. The conical surface angle of the inner concave conical disk is adjusted according to the gap between the outer disk 11 and the small end of the sieve basket, so that the outer disk 11 and the small end of the sieve basket are close to each other but the gap is maintained without contact.

[0025] The blades 4 are straight blades, the number of blades 4 is 8 to 16, and the angle between the blades 4 and the flange 1 is 55 to 70 degrees, which ensures the scraping efficiency of the blades, prevents the coal slime from accumulating on the screen basket surface, and reduces the wear resistance of the blades.

[0026] The blades 4 are welded to the inner side of the inner cone where they connect to the blade 4. Wear-resistant ribs 41 are located at the discharge port 5, with one end welded to the inner cone 2. Welding the wear-resistant ribs 41 to the inner side of the blades 4 and welding one end of the ribs 41 to the inner cone 2 improves the positioning reliability of the ribs 41. When the coal slurry enters the screen basket from the discharge port 5, the wear-resistant ribs 41 and the blades 4 rotate rapidly in sync to stir and break up the coal slurry, making it more evenly distributed. This prevents abnormal vibration caused by imbalance caused by coal accumulation within the screen, improves overall machine performance, and extends the service life of the screen basket. Both the wear-resistant ribs 41 and the blades 4 can be made of alloy materials, offering high wear resistance and a long service life.

[0027] The utility model also provides a horizontal centrifuge, comprising a screen basket 6 and a scraper 7 disposed within the screen basket 6, characterized in that the scraper 7 is the scraper of the horizontal centrifuge described above. In the horizontal centrifuge described above, the gap between the flange 1 and the small end of the screen basket 6 is smaller, resulting in a longer screen basket life, a higher dehydration rate, a larger amount of coal slime processed, lower energy consumption, and a longer drive motor life.

[0028] The above is a complete description of the technical solutions of the embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the embodiments described are only part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

Claims

1. A scraper for a horizontal centrifuge, comprising a flange, an inner cone coaxially aligned with the flange, a guide cone connected to the inner cone, and blades disposed on the outer periphery of the inner cone and connecting the flange and the inner cone, wherein a discharge port is formed between the inner cone and the flange and located in front of the guide cone, and characterized by: The flange is composed of an outer plate, a concave cone plate and an inner plate that are integrally formed from the outside to the inside along the radial direction. The outer plate and the inner plate are both arranged along the radial direction of the scraper. The outer plate is close to the small end of the screen basket. The concave cone plate is a conical plate that is concave inward, so that the inner plate and the outer plate are radially staggered and misaligned.

2. The scraper for a horizontal centrifuge according to claim 1, characterized in that: The angle between the conical surface of the inwardly concave conical disk and the radial direction of the scraper is 15 to 35 degrees.

3. The scraper for a horizontal centrifuge according to claim 1, characterized in that: The blades are straight plate-shaped blades, the number of the blades is 8 to 16, and the angle between the blades and the flange is 55 to 70 degrees.

4. The scraper for a horizontal centrifuge according to claim 3, characterized in that: The inner side of the blade connected to the inner cone is welded with a wear-resistant rib, the wear-resistant rib is located at the discharge port, and one end of the rib is welded to the inner cone.

5. A horizontal centrifuge comprising a screen basket and a scraper disposed in the screen basket, characterized in that: The scraper is the scraper of the horizontal centrifuge according to any one of claims 1 to 4.

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