Device for preventing sediment deposition and hardening of thickener

Abstract

The utility model provides a device for preventing bottom mud deposition and hardening of thickener, which comprises a main shaft (1) and an anti-deflection mechanism (4) arranged on a bottom plate of a material collecting barrel, the bottom of the main shaft (1) is arranged in a central hole of the anti-deflection mechanism (4), the outer wall of the main shaft (1) is connected with a mud scraping plate (3) through a cross beam (2), and a bottom-attaching stirring frame (7) is arranged on the inner side of the bottom of the mud scraping plate (3). The device is simple in structure, slurry at the bottom of the collecting barrel of the deep-cone thickener can be always in an activated state, stability of flow and concentration during underflow discharge is guaranteed, bottom mud compaction can be prevented, a bottom mud hardening area is remarkably reduced, equipment runs in a reasonable torque load range, and mechanical damage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of deep cone thickeners, in particular to a device for preventing thickener bottom mud from being deposited and hardened. Background Art

[0002] Deep cone thickeners are widely used in mining, metallurgy, chemical industry, wastewater treatment and other fields. They are mainly composed of a cylinder, a feeding device, a stirring device, a control box, a dosing device and an automatic control system. The slurry first passes through a degassing tank for degassing, and then enters the feeding device for flocculation to form flocs. The flocs settle to the bottom of the thickener and are concentrated by gravity to form bottom mud, which is discharged from the bottom collecting barrel, and the clarified water is discharged from the overflow weir at the top of the thickener.

[0003] The aggregate drum at the bottom of the deep cone thickener has two main functions: one is to store the paste. The scraper of the rake frame scrapes the paste on the bottom plate of the cone into the aggregate drum, and the aggregate drum plays a role in storing the prepared paste; the second is to stabilize the discharge. The mixing device of the aggregate drum maintains the fluidity and uniformity of the prepared paste (also known as underflow) through mixing and shearing action to prevent sedimentation and compaction. During discharge, the paste is stably transported from the discharge port of the aggregate drum to the next treatment process through a slurry pump.

[0004] In the design of traditional deep cone thickeners, the lowest balance beam is far away from the bottom of the aggregate barrel, which results in a part of the bottom of the aggregate barrel being a dead zone during operation. There is almost no fluidity, and the solid particles in the slurry are deposited and compacted in this area, and the internal slurry is completely compacted. The compaction zone is formed because the slurry inside the aggregate barrel is highly concentrated, and the slurry below the small rake beam and within the scraper cannot be effectively stirred, so the solid particles are gradually deposited and compacted. The existence of the compaction zone has the following four negative effects: 1. As the equipment runs, the slurry in the compaction zone always remains stationary, and its surface is continuously polished by the crossbeam and scraper, and its solid content will continue to increase, which in turn causes the torque on the main shaft to continue to increase, increasing the friction between the main shaft and the anti-sway mechanism, shortening the service life of the equipment and increasing the equipment operating load; 2. The slurry discharge port is located at the bottom of the aggregate barrel. The existence of the compaction zone makes the bottom slurry unevenly dispersed, and the surrounding of the formed plated material pile is easy to crack to form dense blocks, and is sucked into the discharge pipe, affecting the operation of the sludge pump. During the discharge process, the bottom flow concentration is unstable and the discharge flow rate is unstable, affecting the filling effect; 3. After the thickener is emptied, the slurry compaction zone has a large volume and high hardness, which increases the difficulty and workload of workers in cleaning; 4. The material in the compaction zone occupies part of the space of the aggregate barrel, resulting in a smaller effective storage volume of the aggregate barrel. Utility Model Content

[0005] The utility model aims to provide a device for preventing thickener bottom mud from settling and hardening, so as to solve the above-mentioned technical problems.

[0006] The utility model provides a device to prevent thickener bottom mud from settling and hardening, comprising a main shaft and an anti-sway mechanism installed on the bottom plate of a collecting barrel, the bottom of the main shaft is arranged in a central hole of the anti-sway mechanism, the outer wall of the main shaft is connected with a mud scraper through a cross beam, and a bottom-attached stirring frame is arranged on the inner side of the bottom of the mud scraper.

[0007] Furthermore, a flange is arranged on the top of the main shaft, and a rib plate is arranged between the flange and the main shaft.

[0008] Furthermore, the cross beam is arranged horizontally, and the scraper blade is arranged vertically at a position close to the side wall of the collecting barrel.

[0009] Furthermore, the bottom stirring frame includes a horizontal plate and a vertical plate, and reinforcing ribs are arranged between the horizontal plate and the vertical plate.

[0010] Furthermore, one end of the horizontal plate away from the vertical plate is connected to the bottom of the inner side surface of the scraper plate, and a rib plate is arranged between the horizontal plate and the scraper plate.

[0011] Furthermore, one end of the vertical plate away from the horizontal plate is connected to the bottom of the lowest horizontal beam, and a rib plate is arranged between the vertical plate and the horizontal beam.

[0012] Furthermore, the distance between the bottom surface of the transverse plate and the bottom plate of the collecting barrel is not greater than the distance between the bottom of the scraper plate and the bottom plate of the collecting barrel.

[0013] Furthermore, the distance between the vertical plate and the outer wall of the anti-deflection mechanism is not less than the distance between the outer wall of the main shaft and the inner wall of the anti-deflection mechanism.

[0014] Furthermore, the transverse length of the stirring frame close to the bottom is not less than 25% of the radius of the collecting barrel.

[0015] Furthermore, the bottom stirring frame is made of flat steel, angle steel, steel pipe or square steel.

[0016] The utility model has a simple structure. By arranging a stirring frame close to the bottom, the slurry in the compaction area of ​​the traditional deep cone thickener is effectively stirred and activated, ensuring that the slurry at the bottom is evenly dispersed, preventing a large amount of slurry from being compacted, greatly reducing the area of ​​compacted slurry, avoiding shortening the service life of the equipment and increasing the operating load of the equipment, and ensuring the stability of the flow rate and concentration during bottom flow discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of Example 1 of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the bottom stirring frame of Example 1 of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of a bottom-attached stirring frame according to Embodiment 2 of the present utility model;

[0021] Figure 4 For the utility model Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 This is a schematic diagram of the structure of a bottom-attached stirring frame according to Embodiment 3 of the present utility model;

[0023] Description of reference numerals:

[0024] In the figure: 1-main shaft, 2-cross beam, 3-scraper, 4-anti-sway mechanism, 5-flange, 6-rib plate, 7-bottom stirring frame, 71-cross plate, 72-vertical plate, 73-reinforcement rib, 74-rib plate, 8-stirring auxiliary plate, 81-connecting column, 82-connecting sleeve, 9-wedge block; DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Example 1

[0029] like Figure 1 and Figure 2 As shown:

[0030] A device for preventing thickener bottom mud from settling and compacting comprises a main shaft 1 and an anti-sway mechanism 4 installed on the bottom plate of a collecting barrel, wherein the bottom of the main shaft 1 is arranged in the center hole of the anti-sway mechanism 4, a gap is left between the outer wall of the main shaft 1 in the center hole of the anti-sway mechanism 4 and the inner wall of the center hole of the anti-sway mechanism 4, and the center hole of the anti-sway mechanism 4 is within the range within which the main shaft 1 is allowed to deviate.

[0031] The outer wall of the main shaft 1 is connected with a scraper blade 3 through a cross beam 2 , and a bottom-attached stirring frame 7 is arranged between the bottom of the scraper blade 3 and the anti-sway mechanism 4 .

[0032] A flange 5 is provided on the top of the main shaft 1 , and a rib plate 6 is provided between the flange 5 and the main shaft 1 .

[0033] The crossbeam 2 is arranged horizontally, and the scraper blade 3 is arranged vertically at a position close to the side wall of the collecting barrel.

[0034] The bottom stirring frame 7 comprises a horizontal plate 71 and a vertical plate 72 , and a reinforcing rib 73 is arranged between the horizontal plate 71 and the vertical plate 72 .

[0035] One end of the transverse plate 71 away from the vertical plate 72 is connected to the bottom of the inner side surface of the scraper blade 3 , and a rib 74 is provided between the transverse plate 71 and the scraper blade 3 .

[0036] One end of the vertical plate 72 away from the horizontal plate 71 is connected to the bottom of the lowest horizontal beam 2 , and a rib plate 74 is provided between the vertical plate 72 and the horizontal beam 2 .

[0037] The provision of the reinforcing ribs 73 and the ribs 74 can improve the stability of the connection and prevent the rake frame from being damaged or broken when the slurry is stirred.

[0038] The distance between the bottom surface of the horizontal plate 71 and the bottom plate of the collecting barrel is not greater than the distance between the bottom of the scraper plate 3 and the bottom plate of the collecting barrel, so that the slurry in the compacting area of ​​the deep cone thickener is fully stirred to prevent a large amount of slurry from compacting in the compacting area.

[0039] The distance between the vertical plate 72 and the outer wall of the anti-sway mechanism 4 is not less than the distance between the outer wall of the main shaft 1 and the inner wall of the anti-sway mechanism 4, which effectively avoids the impact of the vertical plate 72 on the outer wall of the anti-sway mechanism 4 when the main shaft 1 deviates during rotation, and prevents the vertical plate 72 from contacting the outer wall of the anti-sway mechanism 4 and causing the stirring frame 7 to be stuck at the bottom.

[0040] The transverse length of the bottom stirring frame 7 is not less than 25% of the radius of the collecting barrel.

[0041] The bottom stirring frame 7 is made of flat steel, angle steel, steel pipe or square steel.

[0042] Example 2

[0043] like Figure 3 and Figure 4 As shown, a stirring auxiliary plate 8 is installed on the transverse plate 71, a connecting groove is opened on the transverse plate 71, a connecting column 81 is installed in the connecting groove, a connecting sleeve 82 is rotatably connected to the connecting column 81, the connecting sleeve 82 is connected to the stirring auxiliary plate 8, and the stirring auxiliary plate 8 is located outside the connecting groove.

[0044] Furthermore, springs are arranged between two ends of the connecting sleeve 82 in the connecting groove and the inner wall of the connecting groove, and the spring sleeve is arranged outside the connecting column 81 .

[0045] The stirring auxiliary plate 8 is wedge-shaped, triangular or conical, and the side of the stirring auxiliary plate 8 is wavy. When stirring the slurry in the compacted area, the stirring auxiliary plate 8 can break up the compacted slurry. The movable connection setting of the spring, the connecting column 81 and the connecting sleeve 82 can prevent the connection between the stirring auxiliary plate 8 and the cross plate 71 from being damaged by resistance and causing breakage. The wavy side wall can ensure that the compacted or blocky slurry is pushed to both sides, reducing the stirring resistance.

[0046] Except for the above-mentioned technical features, other technical solutions are the same as those in Example 1 and will not be described in detail here.

[0047] Example 3

[0048] like Figure 5 As shown, a wedge block 9 is installed on the transverse plate 71 , and the wedge block 9 can be detachably connected to the transverse plate 71 through threads, or can be fixedly connected to the transverse plate 71 by welding.

[0049] The wedge block 9 is installed on the front side of the transverse plate 71 near the bottom to improve the stirring and crushing capabilities.

[0050] Except for the above-mentioned technical features, other technical solutions are the same as those in Example 1 and will not be described in detail here.

[0051] The utility model has a simple structure and can effectively activate the slurry in the compaction area of ​​the traditional deep cone thickener, ensure that the slurry at the bottom is evenly dispersed, prevent a large amount of slurry from being compacted, greatly reduce the area of ​​compacted slurry, avoid shortening the service life of the equipment and increasing the operating load of the equipment, and can ensure the stability of the flow rate and concentration during bottom flow discharge.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A device for preventing thickener bottom mud from settling and hardening, characterized in that: The invention comprises a main shaft (1) and an anti-sway mechanism (4) installed on the bottom plate of a collecting barrel, wherein the bottom of the main shaft (1) is arranged in a central hole of the anti-sway mechanism (4), the outer wall of the main shaft (1) is connected to a scraper plate (3) via a cross beam (2), and a bottom-attached stirring frame (7) is arranged on the inner side of the bottom of the scraper plate (3).

2. The device for preventing thickener bottom mud from settling and hardening according to claim 1 is characterized in that: A flange (5) is arranged on the top of the main shaft (1), and a rib plate (6) is arranged between the flange (5) and the main shaft (1).

3. The device for preventing thickener bottom mud from settling and hardening according to claim 1, characterized in that: The crossbeam (2) is arranged horizontally, and the scraper blade (3) is arranged vertically at a position close to the side wall of the collecting barrel.

4. The device for preventing thickener bottom mud from settling and hardening according to claim 1 is characterized in that: The bottom-attached stirring frame (7) comprises a horizontal plate (71) and a vertical plate (72), and a reinforcing rib (73) is arranged between the horizontal plate (71) and the vertical plate (72).

5. The device for preventing thickener bottom mud from settling and hardening according to claim 4 is characterized in that: One end of the transverse plate (71) away from the vertical plate (72) is connected to the bottom of the inner side surface of the scraper plate (3), and a rib plate (74) is provided between the transverse plate (71) and the scraper plate (3).

6. The device for preventing thickener bottom mud from settling and hardening according to claim 4, characterized in that: One end of the vertical plate (72) away from the horizontal plate (71) is connected to the bottom of the lowest horizontal beam (2), and a rib plate (74) is arranged between the vertical plate (72) and the horizontal beam (2).

7. The device for preventing thickener bottom mud from settling and hardening according to claim 4, characterized in that: The distance between the bottom surface of the transverse plate (71) and the bottom plate of the collecting barrel is not greater than the distance between the bottom of the scraper plate (3) and the bottom plate of the collecting barrel.

8. The device for preventing thickener bottom mud from settling and hardening according to claim 4, characterized in that: The distance between the vertical plate (72) and the outer wall of the anti-deflection mechanism (4) is not less than the distance between the outer wall of the main shaft (1) and the inner wall of the anti-deflection mechanism (4).

9. The device for preventing thickener bottom mud from settling and hardening according to claim 8, characterized in that: The length of the stirring frame (7) close to the bottom is not less than 25% of the radius of the collecting barrel.

10. The device for preventing thickener bottom mud from settling and hardening according to claim 1, characterized in that: The bottom-attached stirring frame (7) is made of flat steel, angle steel, steel pipe or square steel.

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