CN221868851U - Horizontal scraper centrifuge - Google Patents

Abstract

The utility model relates to coal preparation equipment, in particular to a horizontal scraper centrifuge. It includes a fixed machine base, a movable machine base, a differential shaft system, a screen basket cover, a screen basket, a scraper and a feed pipe. One end of the movable machine base is equipped with a screen basket cover, and the screen basket and the scraper are placed in the screen basket cover. The other end of the movable machine base is equipped with a differential shaft system, and the differential shaft system includes a gear box, an input shaft, a screen basket shaft and a scraper shaft. The input shaft is driven by a motor and is connected to two input gear keys of the gear box. The outer end of the scraper shaft is connected to the scraper shaft output gear key of the gear box, and the inner end of the scraper shaft is connected to the scraper. The screen basket shaft is sleeved on the scraper shaft. The two ends of the screen basket shaft are respectively connected to the screen basket shaft output gear of the gear box and the screen basket, and a protective sleeve is provided on the outer cover of the screen basket shaft. The utility model has reliable transmission operation and improves production; the feed particle size range is wide and the application range is wide; the gear box is simple to make, easy to maintain, high reliability, low manufacturing cost and low maintenance cost.

Description

Horizontal scraper centrifuge

Technical Field

The utility model relates to coal preparation equipment, in particular to a horizontal scraper centrifuge.

Background Art

In the coal washing process of coal preparation plants, centrifuges are widely used. Centrifuges are machines that use centrifugal force to accelerate the separation of different materials that need to be separated. Centrifuges are divided into vertical scraper centrifuges and horizontal scraper centrifuges. Horizontal scraper centrifuges are widely used. The screen basket and scraper of the horizontal scraper centrifuge are respectively connected to the planetary cycloid differential. The planetary cycloid differential has high manufacturing cost, difficulty in maintenance, and low utilization rate of the screen basket. The Chinese utility model with authorization announcement number CN204503363U discloses a horizontal scraper centrifuge. The feed of the utility model is easy to be blocked, the water content of the discharge is high, the differential is difficult to maintain, and it is only suitable for 0-3 mm feed.

Utility Model Content

The utility model aims to solve the above technical problems, thereby providing a horizontal scraper centrifuge which is easy to maintain and low in cost.

The utility model solves the technical problem and adopts the following technical solution:

A horizontal scraper centrifuge comprises a fixed machine base, a movable machine base placed on the fixed machine base, a differential shaft system, a screen basket cover, a screen basket, a scraper and a feed pipe, wherein the screen basket cover is installed at one end of the movable machine base, the screen basket and the scraper are placed in the screen basket cover, and the differential shaft system is installed at the other end of the movable machine base, the differential shaft system comprises a gear box, an input shaft, a screen basket shaft and a scraper shaft, the input shaft is driven by a motor and is keyed to two input gears of the gear box, the outer end of the scraper shaft is keyed to the scraper shaft output gear of the gear box, the inner end of the scraper shaft is connected to the scraper, the screen basket shaft is sleeved on the scraper shaft, the two ends of the screen basket shaft are respectively connected to the screen basket shaft output gear of the gear box and the screen basket, and a protective sleeve is provided on the outer sleeve of the screen basket shaft.

Compared with the prior art, the utility model adopting the above technical solution has the following beneficial effects:

The differential shaft system adopts the structure of gear box, input shaft, screen basket shaft and scraper shaft. The gear box drives the screen basket shaft and scraper shaft respectively. The transmission operation is reliable and the output is improved. The feed particle size range is wide and the application range is wide. The gear box is simple to manufacture, easy to maintain, with high reliability, low manufacturing cost and low maintenance cost.

Further, the optimization scheme of the utility model is:

The gear box is installed on the bracket, the outer end of the protective sleeve is connected to the gear box, the inner end of the protective sleeve is connected to the bracket, and a screen basket shaft bearing is provided between the inner end of the protective sleeve and the screen basket shaft.

A transparent cover is installed at the inner end of the protective sleeve, and an oil seal is installed between the transparent cover and the screen basket shaft.

The gearbox is provided with a cooling system, which includes an oil pump, a cooling oil tank, an oil inlet pipe and an oil return pipe. The inlet of the oil pump is connected to the outlet of the cooling oil tank, the outlet of the oil pump is connected to the inlet of the gearbox through the oil inlet pipe, and the bottom outlet of the gearbox is connected to the inlet of the cooling oil tank through the oil return pipe.

The screen basket housing comprises an inner housing and an outer housing, the screen basket is placed in the inner housing, the feed pipe is placed in the screen basket housing and is tilted, the upper end of the feed pipe passes through the top of the outer housing and is equipped with a feed funnel, and the inner end of the feed pipe extends into the screen basket. The material in the feed pipe falls smoothly, avoiding blockage and increasing the output.

The inner end of the feed pipe is provided with an extension plate, and the inner end of the extension plate is close to the small end of the screen basket. The extension plate allows the material to be fed to the small end of the screen basket, thereby improving the utilization rate of the screen basket and reducing the moisture content of the discharge material by 0.5-1%.

The bottom of the inner cover of the screen basket cover is provided with a filtrate outlet pipe, the filtrate outlet pipe runs through the movable machine base and the fixed machine base, and the bottom of the outer cover is provided with a discharge hopper.

Baffles are arranged on both sides of the extension plate.

The scraper includes a base plate, a blade plate, a reinforcement plate, an intermediate support ring and an outer support ring. The multiple blade plates are arranged in a spiral shape. The inner end of the blade plate is fixed to the base plate. The middle part and the outer end of the inner side of the blade plate are respectively provided with an intermediate support ring and an outer support ring. The plate surface on the same side of the blade plate is installed with a reinforcement plate, and the plate surface of the blade plate is affixed with wear-resistant ceramics. The scraper reduces the area of the bonding material. The amplitude of the centrifuge is less than 1 mm when working, reducing the vibration of the equipment.

A vibration isolation spring is arranged between the fixed machine base and the movable machine base.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is an axonometric view of an embodiment of the utility model;

FIG2 is a front view of an embodiment of the utility model;

Fig. 3 is a cross-sectional view taken along line A-A of Fig. 2;

Fig. 4 is a cross-sectional view taken along line B-B of Fig. 3;

FIG5 is an axonometric view of the differential shaft system;

FIG6 is a front view of the differential shaft system;

Fig. 7 is a cross-sectional view taken along line C-C of Fig. 6;

Fig. 8 is a cross-sectional view taken along line D-D of Fig. 6;

Fig. 9 is an axonometric view of the differential shafting, screen basket and scraper connection;

FIG10 is a front view of FIG9 ;

FIG11 is a right side view of FIG10 ;

Fig. 12 is a cross-sectional view taken along line E-E of Fig. 10;

Fig. 13 is an axonometric view of the scraper;

FIG. 14 is an axonometric view of the feed pipe.

In the figure: fixed machine base 1; vibration isolation spring 2; movable machine base 3; bracket 4; gear box 5; scraper shaft input gear 5-1; screen basket input shaft input gear 5-2; scraper shaft output gear 5-3; screen basket shaft output gear 5-4; input shaft 6; motor 7; screen basket shaft 8; screen basket shaft rolling bearing 8-1; scraper shaft 9; scraper connecting seat 9-1; protective sleeve 10; transparent cover 10-1; screen basket cover body 11; inner cover body 11-1; outer cover body 11-2; screen basket 12; scraper 13; seat plate 13-1; knife plate 13-2; reinforcement plate 13-3; middle support ring 13-4; outer support ring 13-5; feed pipe 14; feed funnel 15; extension plate 16; baffle 16-1; filtrate outlet pipe 17; discharge hopper 18; oil pump 19; cooling oil tank 20; oil inlet pipe 21; oil return pipe 22.

DETAILED DESCRIPTION

The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to Figures 1 to 4, this embodiment provides a horizontal scraper centrifuge, which is mainly composed of a fixed machine base 1, a vibration isolation spring 2, a movable machine base 3, a differential shaft system, a screen basket 12, a scraper 13 and a cooling system. The fixed machine base 1 is a welded component, which is arranged horizontally. The movable machine base 3 is installed on the fixed machine base 1. A plurality of vibration isolation springs 2 are installed between the fixed machine base 1 and the movable machine base 3. The vibration isolation springs 2 play a role of vibration isolation and buffering, thereby improving the service life of the equipment.

A differential shaft system is installed on the left side of the movable machine base 3, and the differential shaft system is mainly composed of a bracket 4, a gear box 5, an input shaft 6, a motor 7, a screen basket shaft 8, a scraper shaft 9 and a protective sleeve 10 (as shown in Figures 5 to 8). The bracket 4 is installed at the left end of the movable machine base 3, and the gear box 5 is installed on the bracket 4. A gear set is arranged in the gear box 5, and the gear set is mainly composed of a scraper shaft input gear 5-1, a screen basket shaft input gear 5-2, a scraper shaft output gear 5-3, and a screen basket shaft output gear 5-4. The scraper shaft input gear 5-1 is meshed with the scraper shaft output gear 5-3, the screen basket shaft input gear 5-2 is meshed with the screen basket shaft output gear 5-4, the scraper shaft output gear 5-3 and the screen basket shaft output gear 5-4 are coaxially arranged, and the scraper shaft output gear 5-3 and the screen basket shaft output gear 5-4 have different rotation speeds. The inner end of the input shaft 6 extends into the gear box 5 and is connected to the scraper shaft input gear 5-1 and the screen basket input shaft input gear 5-2 through keys respectively. A driven pulley is installed at the outer end of the input shaft 6, and the driven pulley is connected to the driving pulley of the motor 7 through a transmission belt. The motor 7 is installed on the movable machine base 3, and a protective cover is installed on the outer side of the transmission belt.

The outer end of the scraper shaft 9 is connected to the scraper shaft output gear 5-3 of the gear box 5 by a key. The screen basket shaft 8 is a hollow shaft structure. The screen basket shaft 8 is mounted on the scraper shaft 9. The outer end of the scraper shaft 9 extends out of the screen basket shaft 8. The outer end of the screen basket shaft 8 is key-connected to the screen basket shaft output gear 5-4 of the gear box 5. A screen basket shaft rolling bearing 8-1 is installed between the outer end of the screen basket shaft 8 and the housing of the gear box 5. A protective sleeve 10 is mounted on the outer sleeve of the screen basket shaft 8. The outer end of the protective sleeve 10 is connected to the gear box 5. The inner end of the protective sleeve 10 is connected to the bracket 4. A screen basket shaft rolling bearing 8-1 is installed between the inner end of the protective sleeve 10 and the screen basket shaft 8. A transparent cover 10-1 is installed on the inner end of the protective sleeve 10. An oil seal is installed between the transparent cover 10-1 and the screen basket shaft 8.

A screen basket cover 11 is installed on the right side of the movable base 3. The screen basket cover 11 is composed of an inner cover 11-1 and an outer cover 11-2. The inner cover 11-1 is connected to the outer cover 11-2. The inner cover 11-1 and the outer cover 11-2 are both circular. A cover door is installed at the outer end of the outer cover 11-2. The inner ends of the screen basket shaft 8 and the scraper shaft 9 extend into the inner cover 11-1 (as shown in Figures 9 to 12). The screen basket 12 is placed in the inner cover 11-1. The screen basket 12 is in the shape of a cone. The small end of the screen basket 12 is connected to the screen basket shaft 8 by a key. A scraper 13 is arranged in the screen basket 12, and the scraper 13 is mainly composed of a seat plate 13-1, a knife plate 13-2, a reinforcement plate 13-3, an intermediate support ring 13-4 and an outer support ring 13-5 (as shown in FIG13 ). The seat plate 13-1 is circular, and the seat plate 13-1 is connected to the scraper connecting seat 9-1 by bolts, and the scraper connecting seat 9-1 is connected to the scraper shaft 9 by a key. Multiple blades 13-2 are arranged in a spiral shape. The side of the blade 13-2 away from the center of rotation is arc-shaped. The inner end of the blade 13-2 is provided with a notch structure, which is clamped on the outer circumferential surface of the seat plate 13-1. The inner end of the blade 13-2 is welded to the seat plate 13-1. The middle part and the outer end of the inner side of the blade 13-2 are respectively installed with an intermediate support ring 13-4 and an outer support ring 13-5. The diameter of the outer support ring 13-5 is larger than the diameter of the intermediate support ring 13-4, and the diameter of the outer support ring 13-5 is larger than the diameter of the seat plate 13-1. A reinforcement 13-3 is welded on one side of each blade 13-2. The blade 13-2 cooperates with the inner wall of the screen basket 12, and the plate surface of the blade 13-2 is affixed with wear-resistant ceramics. The structure of the scraper 13 reduces the area of the bonding material. The amplitude of the centrifuge is less than 1 mm when working, which greatly reduces the vibration of the equipment. Whether it is 0-50 mm or 0-3 mm material, the centrifuge is fully applicable.

A feed pipe 14 (as shown in FIG. 14 ) is provided in the screen basket housing 11. The feed pipe 14 is arranged at an angle. The upper end of the feed pipe 14 passes through the top of the outer housing 11-2 and is provided with a feed funnel 15. The inner end of the feed pipe 14 extends into the screen basket 12. The feed pipe 14 is arranged at an angle so that the material in the feed pipe 14 can fall smoothly, avoid blockage, and increase production. An extension plate 16 is provided at the inner end of the feed pipe 14. The inner end of the extension plate 16 is close to the small end of the screen basket 12. Baffles 16-1 are provided on both sides of the extension plate 16. The extension plate 16 allows the material to be fed to the small end of the screen basket 12, thereby improving the utilization rate of the screen basket 12 and reducing the moisture content of the discharge material by 0.5-1%. A filtrate outlet is provided at the bottom of the inner cover body 11-1, and a filtrate outlet pipe 17 is installed at the filtrate outlet. The lower end of the filtrate outlet pipe 17 passes through the movable machine base 3 and the fixed machine base 1. A discharge port is provided at the bottom of the outer cover body 11-2, and a discharge hopper 18 is installed at the discharge port.

In order to dissipate the heat of the lubricating oil in the gearbox 5 and increase the service life of the gearbox 5, the gearbox 5 is provided with a cooling system, which is mainly composed of an oil pump 19, a cooling oil tank 20, an oil inlet pipe 21 and an oil return pipe 22. The cooling oil tank 20 is installed at the bottom of the bracket 4. The cooling oil tank 20 is water-cooled or air-cooled. The oil pump 19 is installed on the movable machine base 3 below the bracket 4. The inlet of the oil pump 19 is connected to the outlet at the bottom of the cooling oil tank 20. The outlet of the oil pump 19 is connected to the inlet of the gearbox 5 through the oil inlet pipe 21. The bottom outlet of the gearbox 5 is connected to the inlet at the top of the cooling oil tank 20 through the oil return pipe 22. The gearbox 5 can be maintenance-free for four years, which greatly reduces the maintenance and repair costs and increases production.

The working process of this embodiment is: start the motor 7, the motor 7 drives the gear set in the gear box 5 to rotate, the scraper shaft output gear 5-3 and the screen basket shaft output gear 5-4 respectively drive the scraper shaft 9 and the screen basket shaft 8 to rotate at high speed, the scraper shaft 9 and the screen basket shaft 8 have different rotation speeds, the material enters the screen basket 12 from the feed funnel 15 and the feed pipe 14, the extension plate 16 feeds the material to the small end of the screen basket 12, improves the utilization rate of the screen basket 12, reduces the moisture content of the discharge by 0.5-1%, and the material solids remain on the screen basket 12, the scraper 13 scrapes the material solids from the small end of the screen basket 12 into the discharge hopper 18 of the outer cover body 11-2, and the liquid is separated and discharged from the filtrate outlet pipe 17 of the inner cover body 11-1.

The differential shaft system of the utility model is simple to manufacture and easy to maintain. The feed pipe makes the feed smooth. The setting of the extension plate at the end of the feed pipe allows the material to be fed to the small end of the screen basket, which improves the utilization rate of the screen basket and reduces the moisture content of the discharge by 0.5-1%. The change in the scraper structure makes it less likely to stick to the material and reduces the vibration of the equipment. The utility model has a wide feed particle size range and a wide range of material applications. The material range is 0-50 mm. When used for 0-3mm feed, the differential speed between the scraper and the screen basket is 4-5 rpm. When used for 3-50mm feed, the differential speed between the scraper and the screen basket is 8-10 rpm. One unit can replace two units, that is, replace one coal slime centrifuge and one fine coal centrifuge, reducing the equipment purchase cost.

The above description is only a preferred feasible embodiment of the present utility model, and does not limit the scope of rights of the present utility model. All equivalent structural changes made using the contents of the specification and drawings of the present utility model are included in the scope of rights of the present utility model.

Claims (10)

1. The utility model provides a horizontal scraper centrifuge, includes fixed frame, arranges the movable frame, differential mechanism axle system, sieve basket cover body, sieve basket, scraper and pan feeding pipe on the fixed frame in, and the sieve basket cover body is installed to the one end of movable frame, and sieve basket and scraper are arranged in the sieve basket cover body, and differential mechanism axle system, its characterized in that are installed to the other end of movable frame:

The differential mechanism axle system includes gear box, input shaft, sieve basket axle and scrapes the arbor, and the input shaft is by motor drive and with two input gear key connections of gear box, scrapes the outer end of arbor and the scraper axle output gear key connection of gear box, scrapes the inner and scraper of arbor and be connected, sieve basket axle sleeve dress on scraping the arbor, the both ends of sieve basket axle are connected with sieve basket axle output gear and sieve basket of gear box respectively, sieve basket axle overcoat is equipped with the protection sleeve.

2. The horizontal scraper centrifuge of claim 1, wherein: the gear box is installed on the support, and the outer end of protection sleeve is connected with the gear box, and protection sleeve's inner and leg joint are equipped with the basket axle bearing between protection sleeve's inner and the basket axle.

3. The horizontal scraper centrifuge of claim 1, wherein: the inner end of the protective sleeve is provided with a transparent cover, and an oil seal is arranged between the transparent cover and the screen basket shaft.

4. The horizontal scraper centrifuge of claim 1, wherein: the gearbox is provided with a cooling system, the cooling system comprises an oil pump, a cooling oil tank, an oil inlet pipe and an oil return pipe, an inlet of the oil pump is communicated with an outlet of the cooling oil tank, an outlet of the oil pump is communicated with an inlet of the gearbox through the oil inlet pipe, and an outlet at the bottom of the gearbox is communicated with an inlet of the cooling oil tank through the oil return pipe.

5. The horizontal scraper centrifuge of claim 1, wherein: the sieve basket cover body comprises an inner cover body and an outer cover body, the sieve basket is arranged in the inner cover body, the feeding pipe is arranged in the sieve basket cover body and is obliquely arranged, the upper end of the feeding pipe penetrates through the top end of the outer cover body and is provided with a feeding funnel, and the inner end of the feeding pipe extends into the sieve basket.

6. The horizontal scraper centrifuge of claim 1, wherein: the inner end of the feeding pipe is provided with an extension plate, and the inner end of the extension plate is close to the small end of the screen basket.

7. The horizontal scraper centrifuge of claim 5, wherein: the bottom of the inner cover body of the screen basket cover body is provided with a filtrate outlet pipe, the filtrate outlet pipe penetrates through the movable base and the fixed base, and the bottom of the outer cover body is provided with a discharge hopper.

8. The horizontal scraper centrifuge of claim 6, wherein: baffles are arranged on two sides of the extension plate.

9. The horizontal scraper centrifuge of claim 1, wherein: the scraper comprises a seat plate, a plurality of cutter plates, reinforcing plates, middle supporting rings and outer supporting rings, wherein the plurality of cutter plates are spirally distributed, the inner ends of the cutter plates are fixedly connected with the seat plate, the middle parts and the outer ends of the inner sides of the cutter plates are respectively provided with the middle supporting rings and the outer supporting rings, the reinforcing plates are arranged on the surfaces of the same sides of the cutter plates, and wear-resistant ceramics are adhered to the surfaces of the cutter plates.

10. The horizontal scraper centrifuge of claim 1, wherein: and a vibration isolation spring is arranged between the fixed base and the movable base.