A spiral propeller with multi-layer water filtration

Abstract

The utility model discloses a spiral propeller with multi-layer water filtration, including a cylinder and a cone, spiral propulsion blades are arranged at the cylinder and the cone, a first support plate is set between the cylinder and the cone, a closing plate is arranged on the right side of the first support plate, a second support plate is arranged on the left side of the first support plate, a third support plate is arranged on the left side of the second support, through holes are opened at the first support plate, the second support plate and the third support plate, a feed pipe passes through the through hole, a first cavity and a first material throwing hole are formed between the first support plate and the closing plate, a second cavity and a second material throwing hole are formed between the second support plate and the first support plate, a third cavity and a third material throwing hole are formed between the third support plate and the second support plate, a fourth cavity and a fourth material throwing hole are formed between the third support plate and the side end of the cone, and a discharge port is opened on the feed pipe. The utility model can completely separate the solid and liquid of the material, and the water content of the solid phase is lower, which is worthy of promotion and application.

Description

Technical Field

[0001] The utility model relates to a propeller, in particular to a spiral propeller, and in particular to a spiral propeller with multi-layer water filtering. Background Art

[0002] The screw propeller is an important part of the horizontal screw centrifuge. Its principle is: the drum and the screw propeller rotate at high speed in the same direction with a certain differential speed. The material is continuously introduced into the cylinder of the screw propeller from the feed pipe, and enters the drum after acceleration. Under the strong action of centrifugal force, the heavier solid phase is deposited on the drum wall to form a sediment layer. The spiral blades on the screw propeller continuously push the deposited solid phase to the cone end of the drum and discharge it out of the machine through the slag discharge port. The lighter liquid phase forms an inner liquid ring and continuously overflows the drum from the overflow port at the large end of the drum and is discharged out of the machine through the liquid discharge port. The screw propeller on the traditional horizontal screw centrifuge, When the material (solid phase obtained by centrifugal separation to form a sediment layer) is pushed to the outlet of the drum cone by the screw propeller, some of the material cannot leave the cone of the screw propeller in time, and there is no outlet in the cone of the screw propeller to allow it to flow out. As a result, some of the material will be retained in the cone of the screw propeller and cannot be discharged. This will not only cause incomplete separation of the solid and liquid phases of the material, but also make the screw propeller particularly difficult to clean. If it is not cleaned for a long time, the screw propeller will not be able to achieve dynamic balance when rotating at high speed, and it will shake violently, posing a hidden danger to the safe operation of the horizontal screw centrifuge.

[0003] Chinese utility model patent CNCN 214021392 U discloses a device for smooth slag discharge without blockage for a centrifuge, the device comprises a cover shell, a drum is rotatably connected inside the cover shell, a screw propeller with a speed difference with the drum is rotatably connected inside the drum; the screw propeller comprises a cylinder body, a spiral propulsion blade is spirally fixed on the cylinder body, a cavity is arranged on the cylinder body, a material inlet is arranged on the cylinder body at the cavity, a material inlet pipe is arranged in the cylinder body, and a feed outlet located at the cavity is arranged at the inner end of the material inlet pipe; a water outlet is arranged on the left end side of the drum, and a slag outlet is arranged on the right end side of the drum; an end shaft is fixed to the right end of the cylinder body, and an inclined guide surface corresponding to the position of the slag outlet is arranged on the left side of the end shaft. Since there is a gap between the material inlet pipe and the cylinder body (the material inlet pipe is stationary and the cylinder body rotates at high speed, so they cannot be assembled very tightly), the material will flow into the closed end side of the cylinder body (i.e. the side of the drum cone section) through the gap, making it impossible to discharge the material. Not only is it difficult to clean, but the high-speed rotation of the screw propeller will cause severe vibration, posing a hidden danger to the safe operation of the horizontal screw centrifuge. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings of the prior art and provide a spiral propeller with multi-layer water filtration that can completely separate materials, thereby meeting the requirements of thorough solid-liquid separation of materials, lower water content of solid phase, and safe operation and use of horizontal screw centrifuge.

[0005] The utility model solves the technical problem by adopting a technical solution: the spiral propeller with multi-layer water filtration comprises a cylinder, a cone is fixed at the end of the cylinder, spiral propulsion blades are continuously fixed at the cylinder and the cone, a first support plate is fixed at the joint between the cylinder and the cone, a closing plate fixed at the cylinder is provided on the right side of the first support plate, a second support plate fixed at the cone is provided on the left side of the first support plate, a third support plate fixed at the cone is provided on the left side of the second support plate, coaxially arranged through holes are opened at the first support plate, a feed pipe passes through the through hole, and the first support plate and the third support plate are connected. The first cavity is formed between the closing plates, the second cavity is formed between the second support plate and the first support plate, the third cavity is formed between the third support plate and the second support plate, and the fourth cavity is formed between the third support plate and the side end of the cone cylinder. The end of the feed pipe is provided with a discharge port located at the first cavity; a group of first material discharge holes opened on the cylinder are arranged at the first cavity; a group of second material discharge holes opened on the cone cylinder are arranged at the second cavity; a group of third material discharge holes opened on the cone cylinder are arranged at the third cavity; a group of fourth material discharge holes opened on the cone cylinder are arranged at the fourth cavity, and each fourth material discharge hole is close to the side of the third support plate. The function of the spiral propulsion blades here is to discharge the solid matter separated from the material; the function of the through hole here is for the passage of the feed pipe; the function of the feed pipe and the discharge port here is to transport the material; the first material throwing hole, the second material throwing hole, the third material throwing hole, and the fourth material throwing hole here enable the material retained inside the cone to be thrown out in stages, which not only facilitates the cleaning inside the cone, but also enables the material to be completely separated from the solid and liquid, with a good material separation effect, and will not affect the dynamic balance of the spiral propeller, making the horizontal screw centrifuge safer to use; the function of the first support plate, the second support plate, the third support plate, the first cavity, the second cavity, the third cavity, and the fourth cavity here is to gradually block the material when it flows back to the inside of the cone through the gap between the through hole and the feed pipe, thereby preventing the material from flowing back to various places inside the cone all at once. This setting is more conducive to the rapid discharge of the material that flows back into the cone.

[0006] Further improvement, a self-lubricating layer is provided on the outer contour of the spiral propulsion blade. The function of the self-lubricating layer here is to make the outer contour of the spiral propulsion blade fit more closely to the inner wall of the drum, so that not only the spiral propulsion blade can more thoroughly drive the solids out of the drum, but also when the spiral propulsion blade touches the inner wall of the drum, the friction resistance is small, the noise is low, the solid phase of the material is discharged more efficiently, and it is avoided to be trapped on the inner wall of the drum; the self-lubricating layer here is made of tin bronze material.

[0007] For further improvement, a support member is provided at the side end of the feed pipe; the support member includes a support rod fixed on the closing plate, a conical block with a larger outer side and a smaller inner side is fixed at the head end of the support rod, a seat block is fixed at the side end of the feed pipe, a conical hole matching the conical block is opened in the seat block, a pair of first circular raceways with a semicircular cross-section is opened on the conical block, a second circular raceway whose number, position, size and shape match the first circular raceway is opened on the seat block, a group of steel balls are installed between the first circular raceway and the second circular raceway, and a sealing ring is installed between the seat block and the support rod. The function of the support here is to prevent the inner end of the feed pipe from bending down and touching the through hole due to the weight of the material during the process of conveying materials by the feed pipe, which not only generates resistance to the screw propeller, but also generates great friction noise, which will cause the wall of the feed pipe to be damaged over time; the working principle of the support here is: when the screw propeller rotates at high speed, the support rod will also rotate at high speed, and when the support rod rotates at high speed, it will drive the balls to rotate, so that the support rod not only supports the feed pipe, but also prevents the feed pipe from rotating through the balls; the function of the tapered hole and tapered block here is to prevent the support rod from detaching from the seat block; the function of the sealing ring here is to prevent the material from entering the seat block.

[0008] The beneficial effects of the utility model are:

[0009] 1) It can quickly discharge the material that flows back into the cone, so that the solid-liquid separation of the material is more thorough, and it can also be more convenient to clean the inside of the screw propeller, avoiding the situation where the material is retained in the cone and causes the screw propeller to shake violently when rotating at high speed;

[0010] 2). The self-lubricating layer on the outer contour of the spiral propulsion blade can make the outer contour of the spiral propulsion blade stick to the inner wall of the drum, so that the solid phase can be pushed away more thoroughly, not only the material separation efficiency is high, but also the noise is lower;

[0011] 3) Use a support to support the feed pipe to prevent the inner end of the feed pipe from bending down and touching the through hole in a high-speed rotating state, which will not only cause wear and damage to the wall of the feed pipe, but also generate increased noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 for Figure 1 A local enlarged view of area A;

[0014] Figure 3 It is a structural schematic diagram of the support area in the utility model;

[0015] Figure 4 It is a structural schematic diagram of the cone block area in the utility model.

[0016] Explanation of the reference numerals: cylinder 1, conical cylinder 2, spiral propulsion blade 3, self-lubricating layer 3-1, first support plate 4, closing plate 5, second support plate 6, third support plate 7, through hole 8, feed pipe 9, discharge port 9-1, first cavity 10, first material discharge hole 10-1, second cavity 11, second material discharge hole 11-1, third cavity 12, third material discharge hole 12-1, fourth cavity 13, fourth material discharge hole 13-1, support member 14, support rod 14-1, cone block 14-2, first annular raceway 14-2a, seat block 14-3, cone hole 14-3a, second annular raceway 14-3b, steel ball 14-4, sealing ring 14-5, drum 15, slag discharge port 16, solid phase 17, liquid phase 18. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] Referring to the accompanying drawings: this spiral propeller with multi-layer water filtration includes a cylinder 1, a cone 2 is fixed at the end of the cylinder 1, spiral propulsion blades 3 are continuously fixed at the cylinder 1 and the cone 2, a first support plate 4 is fixed at the joint position between the cylinder 1 and the cone 2, a closing plate 5 fixed at the cylinder 1 is provided on the right side of the first support plate 4, a second support plate 6 fixed at the cone 2 is provided on the left side of the first support plate 4, a third support plate 7 fixed at the cone 2 is provided on the left side of the second support plate 6, the first support plate 4, the second support plate 6 and the third support plate 7 are all provided with coaxially arranged through holes 8, a feed pipe 9 passes through the through hole 8, a first cavity 10 is formed between the first support plate 4 and the closing plate 5, a second cavity 11 is formed between the second support plate 6 and the first support plate 4, a third cavity 12 is formed between the third support plate 7 and the second support plate 6, a fourth cavity 13 is formed between the third support plate 7 and the side end of the cone 2, and a discharge port 9-1 located at the first cavity 10 is provided at the end of the feed pipe 9;

[0019] The first cavity 10 is provided with a group of first material ejection holes 10-1 opened on the cylinder 1;

[0020] The second cavity 11 is provided with a group of second material ejection holes 11-1 opened on the cone 2;

[0021] The third cavity 12 is provided with a group of third material ejection holes 12-1 opened on the cone 2;

[0022] The fourth cavity 13 is provided with a group of fourth material throwing holes 13 - 1 opened on the cone 2 , and each fourth material throwing hole 13 - 1 is close to the third support plate 7 side.

[0023] A self-lubricating layer 3 - 1 is provided on the outer contour of the spiral propulsion blade 3 .

[0024] A support member 14 is provided at the side end of the feed pipe 9; the support member 14 includes a support rod 14-1 fixed on the closing plate 5, a cone block 14-2 with a larger outer surface and a smaller inner surface is fixed to the head end of the support rod 14-1, a seat block 14-3 is fixed to the side end of the feed pipe 9, a cone hole 14-3a matching the cone block 14-2 is opened in the seat block 14-3, a pair of first circular raceways 14-2a with a semicircular cross-section are opened on the cone block 14-2, a second circular raceway 14-3b whose number, position, size and shape match the first circular raceway 14-2a is opened on the seat block 14-3, a group of steel balls 14-4 are installed between the first circular raceway 14-2a and the second circular raceway 14-3b, and a sealing ring 14-5 is installed between the seat block 14-3 and the support rod 14-1.

[0025] The working principle of the utility model is as follows: since the screw propeller is in a high-speed rotating state, and the feed pipe needs to remain stationary, when the feed pipe 9 passes through the through hole 8 and makes the discharge port 9-1 reach the first cavity 10, there is a gap between the feed pipe 9 and the through hole 8. When the feed pipe 9 conveys the material at high pressure and sprays it through the discharge port 9-1, due to the large amount of material sprayed in a short time, the material will gather in the first cavity 10, and some materials have not had time to be thrown out to the inner wall of the drum 15 through the first material throwing hole 10-1, so that the material will flow to the inside of the cone 2 through the gap between the feed pipe 9 and the through hole 8. Since the inside of the cone 2 on the traditional screw propeller is in a closed state, the material cannot be discharged, which will cause The material separation is not thorough and the cone 2 is difficult to clean. The material retained inside the cone 2 will cause the screw propeller to be unable to achieve dynamic balance when rotating. When the screw propeller rotates at high speed, it shakes violently, and the horizontal screw centrifuge cannot operate safely. The present solution sets blocking cavities one by one in an oblique upward direction inside the cone 2, and sets a material throwing hole on each cavity, so that the material flowing into the cone 2 can be thrown out to the inner wall of the drum by the material throwing hole at the first time and centrifugal separation operation is performed, so that the solid-liquid separation of the material is more thorough, and the inside of the cone 2 is more convenient to clean. When the screw propeller rotates at high speed, it can achieve dynamic balance, the screw propeller shakes less, and the horizontal screw centrifuge can operate safely, which is worthy of promotion and application.

[0026] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A multi-layer water filtration screw propeller, comprising a cylinder (1), characterized in that: A cone (2) is fixed at the end of the cylinder (1), and spiral propulsion blades (3) are continuously fixed at the cylinder (1) and the cone (2). A first support plate (4) is fixed at the joint between the cylinder (1) and the cone (2), and a closing plate (5) fixed to the cylinder (1) is provided on the right side of the first support plate (4), and a second support plate (6) fixed to the cone (2) is provided on the left side of the first support plate (4), and a third support plate (7) fixed to the cone (2) is provided on the left side of the second support plate (6). The first support plate (4), the second support plate (6) and the third support plate (7) are fixed to the cone (2). The three support plates (7) are each provided with a coaxially arranged through hole (8), a feed pipe (9) passes through the through hole (8), a first cavity (10) is formed between the first support plate (4) and the closing plate (5), a second cavity (11) is formed between the second support plate (6) and the first support plate (4), a third cavity (12) is formed between the third support plate (7) and the second support plate (6), a fourth cavity (13) is formed between the third support plate (7) and the side end of the cone (2), and a discharge port (9-1) is formed at the end of the feed pipe (9) and is located at the first cavity (10); The first cavity (10) is provided with a group of first material ejection holes (10-1) opened on the cylinder (1); The second cavity (11) is provided with a group of second material ejection holes (11-1) opened on the cone cylinder (2); The third cavity (12) is provided with a group of third material ejection holes (12-1) opened on the cone cylinder (2); The fourth cavity (13) is provided with a group of fourth material ejection holes (13-1) opened on the cone cylinder (2).

2. A screw propeller with multi-layer water filtration according to claim 1, characterized in that: A self-lubricating layer (3-1) is provided on the outer contour of the spiral propulsion blade (3).

3. A screw propeller with multi-layer water filtration according to claim 2, characterized in that: A support member (14) is provided at the side end of the feed pipe (9); the support member (14) comprises a support rod (14-1) fixed on the closing plate (5); a cone block (14-2) with a larger outer portion and a smaller inner portion is fixed at the head end of the support rod (14-1); a seat block (14-3) is fixed at the side end of the feed pipe (9); a cone hole (14-3a) is provided in the seat block (14-3) and matches with the cone block (14-2); and a hole (14-3a) is provided on the cone block (14-2) For a first circular raceway (14-2a) having a semicircular cross section, the seat block (14-3) is provided with a second circular raceway (14-3b) whose number, position, size and shape match the first circular raceway (14-2a), a group of steel balls (14-4) is installed between the first circular raceway (14-2a) and the second circular raceway (14-3b), and a sealing ring (14-5) is installed between the seat block (14-3) and the support rod (14-1).

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