Spiral centrifugal machine with material returning prevention baffle

Abstract

The spiral centrifugal machine comprises a housing, a rotating drum is arranged in the housing, a spiral propeller is connected in the rotating drum in a rotating mode, the spiral propeller comprises a roller and a spiral propelling blade, the roller comprises a straight section pipe and a conical section pipe, a first partition plate is fixed to an inner cavity of the straight section pipe, a through round hole is formed in the first partition plate, and a through hole is formed in the conical section pipe. The right side of the first baffle is provided with first discharging ports, the first baffle is arranged between the first discharging ports, the first baffle is provided with a first through hole, a set of arc blocks which are fixed to an inner cavity of the straight section pipe and evenly distributed along the center of the straight section pipe are arranged between the first partition plate and the first baffle, and the conical section pipe is provided with a set of second discharging ports. Second baffles fixed to the conical section pipe are arranged between the second discharging ports, and second through holes are formed in the second baffles. The solid-liquid separation device can prevent materials from returning, can avoid accumulation and blockage of the materials, greatly reduces the cost during solid-liquid separation, avoids time and labor waste due to frequent dredging, and is worthy of popularization and application.

Description

Technical Field

[0001] The utility model relates to the field of centrifuges, in particular to a spiral centrifuge with a baffle for preventing material return. Background Art

[0002] In the existing centrifuge industry in my country, the partitions at the conical spiral discharge port are mostly in the form of a hole in the middle of a disc, and the outlet of the discharge cavity is a circular hole or a slotted hole on the cylindrical surface. The flow area of ​​the outlet is not large enough. In the long run, the material is prone to backflow at the spiral discharge port and is prone to blockage due to accumulation, resulting in reduced efficiency. It is more troublesome to dredge and cannot be dredged without stopping the machine. It is also time-consuming and labor-intensive. Therefore, the existing spiral discharge port area is prone to backflow, blockage, and frequent dredging is time-consuming and labor-intensive.

[0003] Chinese invention patent CN 118649789 A discloses a decanter centrifuge comprising a spiral cylinder, a distribution bin within the cylinder, a distribution hopper within the distribution bin, a jacketed feed pipe mounted at the end of the spiral cylinder via a bearing, the jacketed feed pipe extending into the distribution hopper, and a spiral annular plate attached to the spiral cylinder between the distribution hopper and the bearing mounting. The spiral annular plate is sleeved over the jacketed feed pipe, forming a spiral channel between the spiral annular plate and the inner wall of the spiral cylinder. The conical spiral discharge port of this decanter centrifuge is prone to backflow and blockage, resulting in reduced efficiency and making unblocking difficult. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings of the prior art and provide a spiral centrifuge with a material return prevention baffle that can prevent material return and material accumulation from clogging without stopping the machine, thereby meeting the needs of the centrifuge for preventing material return and material accumulation from clogging.

[0005] The utility model adopts a technical solution to solve its technical problems: this spiral centrifuge with a baffle to prevent material return comprises a cover shell, a drum is rotatably connected inside the cover shell, a spiral propeller with a speed difference from the rotation of the drum is rotatably connected inside the drum, the spiral propeller comprises a roller and a spiral propulsion blade fixed to the outer contour of the roller, the roller comprises a straight tube and a tapered tube, a first partition is fixed to the inner cavity of the straight tube, a through circular hole is opened on the first partition, a group of first discharge ports opened on the straight tube is provided on the right side of the first baffle, a first baffle fixed on the straight tube is provided between each first discharge port, a first through hole is opened on the first baffle, a group of circular arc blocks fixed on the inner cavity of the straight tube and evenly distributed along the center of the straight tube are provided between the first partition and the first baffle, a group of second discharge ports are opened on the tapered tube, a second baffle fixed on the tapered tube is provided between each second discharge port, and a second through hole is opened on the second baffle. The function of the drum and the screw propeller here is to utilize the differential to enable the drum and the screw propeller to maintain a constant speed difference, so as to separate the solid and liquid of the material and discharge it; the function of the arc block here is to prevent the material from being deposited in the discharge cavity; the function of the first baffle and the first through hole here is to divert the material to avoid the material from clogging the first discharge port; the function of the first discharge port here is for high-speed discharge of the material; the function of the second discharge port here is to prevent the overflowing material from completely flowing out from the second discharge port when the material cannot be discharged from the first cavity, so as to avoid blockage; the function of the second baffle and the second through hole here is to divert the material to avoid the material from clogging the second discharge port; the function of the first partition here is to prevent the material from flowing back when it cannot be discharged quickly due to extrusion; the function of the through hole here is for the passage of the material feed pipe and support at the through hole.

[0006] Further improvement, the outer contour of the first through hole is a first triangular cross-section, and the outer contour of the second through hole is a second triangular cross-section. The first and second triangular cross-sections are used to divide the material, reduce the material discharge resistance, speed up the discharge, and prevent the material from clogging in the discharge chamber.

[0007] Further improvement, a sealing ring is installed at the through hole. The function of the sealing ring is to prevent the material from leaking out from the gap between the feed pipe and the through hole.

[0008] Further improvement, a first self-lubricating layer is provided at the contour of the through hole. The function of the first self-lubricating layer is to reduce the friction between the feed pipe and the through hole, thereby reducing the resistance of the screw propeller during operation.

[0009] The beneficial effects of the utility model are:

[0010] 1). It can avoid material return;

[0011] 2) It can avoid material accumulation and blockage;

[0012] 3). Greatly reduce the cost of solid-liquid separation and avoid frequent dredging which is time-consuming and labor-intensive.

[0013] 4). The material enters the discharge cavity of the straight section of the drum through the feed pipe. At this time, the arc block prevents the material from depositing in the discharge cavity, and the first partition prevents the material from clogging in the discharge cavity. Some of the material that does not have time to exit from the first discharge port enters the discharge cavity at the tapered section of the drum, and then leaves the screw propeller through the second discharge ports to reach the drum. The simultaneous action of the two can prevent the screw propeller cavity from returning material or being blocked without stopping the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 It is a three-dimensional diagram of the screw propeller in the present utility model;

[0016] Figure 3 This is a three-dimensional diagram of the threaded propeller of the present invention without the spiral propulsion blades;

[0017] Figure 4 This is a front view of the threaded propeller in the utility model without the spiral propulsion blades;

[0018] Figure 5 for Figure 4 AA cross-sectional view;

[0019] Figure 6 for Figure 5 A local enlarged view of area B.

[0020] Explanation of the reference numerals: cover 1, drum 2, screw propeller 3, roller 3-1, straight section pipe 3-1a, tapered section pipe 3-1b, first partition 3-1c, first discharge port 3a-1c, circular hole 3-1d, first self-lubricating layer 3a-1d, first baffle 3-1e, first through hole 3a-1e, first triangular section 3b-1e, arc block 3-1f, second discharge port 3-1g, second baffle 3-1h, second through hole 3a-1h, second triangular section 3b-1g, second baffle 3-1h, screw propulsion blade 3-2, feed pipe 4. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] Referring to the accompanying drawings: This spiral centrifuge with a baffle to prevent backflow includes a housing 1, a drum 2 is rotatably connected to the housing 1, a screw propeller 3 with a speed difference from the drum 2 is rotatably connected to the drum 2, the screw propeller 3 includes a roller 3-1 and a spiral propeller blade 3-2 fixed to the outer contour of the roller 3-1, the roller 3-1 includes a straight tube 3-1a and a tapered tube 3-1b, a first baffle 3-1c is fixed to the inner cavity of the straight tube 3-1a, a circular hole 3-1d is opened on the first baffle 3-1c, and a group of first discharge ports 3a opened on the straight tube 3-1a are provided on the right side of the first baffle 3-1c -1c, a first baffle 3-1e fixed on the straight tube 3-1a is provided between each first discharge port 3a-1c, and a first through hole 3a-1e is provided on the first baffle 3-1e, a group of arc blocks 3-1f fixed to the inner cavity of the straight tube 3-1a and evenly distributed along the center of the straight tube 3-1a are provided between the first partition plate 3-1c and the first baffle 3-1e, a group of second discharge ports 3-1g are provided on the tapered tube 3-1b, and a second baffle 3-1h fixed on the tapered tube 3-1b is provided between each second discharge port 3-1g, and a second through hole 3a-1h is provided on the second baffle 3-1h.

[0023] The outer contour of the first through hole 3a-1e is a first triangular cross-section 3b-1e; the outer contour of the second through hole 3a-1h is a second triangular cross-section 3b-1h.

[0024] A sealing ring 3-3 is installed through the circular hole 3-1d.

[0025] A first self-lubricating layer 3a-1d is provided at the contour of the circular hole 3-1d.

[0026] The working principle of the present invention is as follows: when the screw propeller 3 and the drum 2 are used to separate the solid and liquid of the material, the drum 2 and the screw pusher 3 rotate at a high speed in the same direction at a certain differential speed through the differential, and the inner cylinder of the screw pusher 3 is accelerated and enters the drum 2, and the material is continuously introduced into the right side of the first partition 3-1c by the feed pipe 4 and diverted by the first baffle 3-1e and the first through hole 3a-1e, thereby avoiding the material from being blocked at the first discharge port 3a-1c, and cutting the material through the first triangular cross-section 3b-1e, so that the material can be quickly and smoothly discharged through each first discharge port 3a-1c to the drum 2. At this time, the arc blocks 3-1f here can prevent the material from being deposited in the inner cavity of the straight section pipe 3-1a, and for the material that enters too much and has no time to be discharged from each first discharge port in the future. When the material is discharged from the outlet 3a-1c, the excess material can be diverted by the second baffle 3-1h and the second through hole 3a-1h, so as to avoid too much material clogging at the second outlet 3-1g. The material is cut by the second triangular section 3b-1h, so that the material can be quickly and smoothly discharged through each second outlet 3-1g to the drum 2, avoiding the backflow of the material when the material is quickly fed. Under the action of strong centrifugal force, the heavier solid phase is deposited on the inner wall of the drum 2 to form a sediment layer. The spiral propulsion blade 3-1 on the spiral pusher 3 rotates and pushes the deposited solid phase continuously to the conical tube section of the drum 2 and discharged through the slag discharge end. The clear liquid approaches the inner wall side of the drum 2 and continuously moves toward the right and overflows through the liquid outlet at the other end of the drum 2, which is worthy of promotion and application.

[0027] While the present invention has been shown and described with reference to 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 spiral centrifuge with a baffle for preventing material return, comprising a housing (1), a drum (2) rotatably connected to the housing (1), a spiral propeller (3) rotatably connected to the drum (2) and having a speed difference with the drum (2), wherein: The screw propeller (3) comprises a roller (3-1) and a screw propulsion blade (3-2) fixed to the outer contour of the roller (3-1); the roller (3-1) comprises a straight section tube (3-1a) and a tapered section tube (3-1b); a first baffle (3-1c) is fixed to the inner cavity of the straight section tube (3-1a); a through-hole (3-1d) is opened on the first baffle (3-1c); a group of first discharge ports (3a-1c) opened on the straight section tube (3-1a) are provided on the right side of the first baffle (3-1c); and a first discharge port (3a-1c) fixed on the straight section tube (3-1a) is provided between each of the first discharge ports (3a-1c). A first baffle (3-1e) is provided with a first through hole (3a-1e); a group of arc blocks (3-1f) fixed to the inner cavity of the straight tube (3-1a) and evenly distributed along the center of the straight tube (3-1a) are provided between the first partition (3-1c) and the first baffle (3-1e); a group of second discharge ports (3-1g) are provided on the conical tube (3-1b); a second baffle (3-1h) fixed to the conical tube (3-1b) is provided between each of the second discharge ports (3-1g); and a second through hole (3a-1h) is provided on the second baffle (3-1h).

2. A spiral centrifuge with a backflow prevention baffle according to claim 1, characterized in that: The outer contour of the first through hole (3a-1e) is a first triangular cross-section (3b-1e); the outer contour of the second through hole (3a-1h) is a second triangular cross-section (3b-1h).

3. The spiral centrifuge with a backflow prevention baffle according to claim 1, characterized in that: A sealing ring (3-3) is installed at the through circular hole (3-1d).

4. A spiral centrifuge with a backflow prevention baffle according to claim 3, characterized in that: A first self-lubricating layer (3a-1d) is provided at the contour of the through circular hole (3-1d).

Images