Overflow level stepless adjusting device of horizontal decanter centrifuge

Abstract

The present application relates to the technical field of coal slime dewatering, and discloses a stepless overflow liquid level adjusting device for a horizontal settling centrifuge, which comprises an end cover, a plurality of overflow ports on the end cover, a weir plate, an impeller disc and an adjusting gear, the weir plate has a plurality of weir plates corresponding to the number of the overflow ports, the weir plates are slidably arranged on the end cover and used for controlling the opening degree of the overflow ports, the weir plate bottom is provided with engaging teeth, a vortex sliding groove is formed on one side of the surface of the impeller disc, the vortex sliding groove is matched with the engaging teeth, the circumferential surface of the impeller disc is provided with gear teeth, and the adjusting gear is rotatably arranged on the end cover and matched with the gear teeth. Through the above technical scheme, the problems of complicated operation and low precision in adjusting the overflow liquid level height in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal slime dewatering, in particular to a horizontal settling centrifuge overflow liquid level stepless adjusting device. BACKGROUND

[0002] The horizontal settling filter centrifuge is a horizontal spiral unloading, continuous operation of the settling filter fine coal slime dewatering equipment, commonly used in coal preparation plant flotation clean coal, medium coal, tailings, primary slime or cyclone underflow and other material dewatering, also can be used for similar material solid-liquid separation.

[0003] Its working principle is to use the solid-liquid specific gravity difference, rely on the centrifugal force field to expand thousands of times, the solid phase is settled under the action of centrifugal force, so as to realize solid-liquid separation, and is discharged from the body under the action of special mechanism, the moisture of the settled material is crucial to the moisture and dewatering effect of the final product, the moisture of the settled material depends on the overflow liquid level height, mainly controlled by the weir plate height of the overflow port, the higher the weir plate height, the higher the moisture of the settled product, the lower the weir plate height, the more solid particles enter the filtrate, thereby causing coarse running phenomenon, reducing the recovery rate. Therefore, the overflow liquid level height is an important adjusting parameter of the horizontal settling filter centrifuge, in the prior art, the method of adjusting the weir plate is to remove the bolts on the weir plate, after adjusting the height of the weir plate, reinstall the weir plate, the operation is cumbersome, and can only be adjusted in steps, not accurate enough, the present application provides a solution to the problem. SUMMARY

[0004] The horizontal settling centrifuge overflow liquid level stepless adjusting device solves the problem of cumbersome operation and inaccurate adjustment of the overflow liquid level height in the related art.

[0005] The technical scheme of the present application is as follows: the horizontal settling centrifuge overflow liquid level stepless adjusting device comprises an end cover, the end cover has a plurality of overflow ports, a weir plate, a scroll and an adjusting gear, the weir plate has a plurality of corresponding to the number of the plurality of overflow ports, the plurality of weir plates are slidingly arranged on the end cover, used for adjusting the opening degree of the overflow port, the bottom of the weir plate has a meshing tooth, the surface of the scroll is provided with a scroll sliding groove, the scroll sliding groove is matched with the meshing tooth, the circumferential surface of the scroll has a gear tooth, and the adjusting gear is rotatably arranged on the end cover and matched with the gear tooth.

[0006] As a further technical scheme, the end cover is provided with an outer shell, and the scroll and the adjusting gear are located in the outer shell.

[0007] As a further technical scheme, the end cover is provided with a fixed sliding rail, the outer shell has a through slot, and the bottom of the weir plate is slidingly arranged in the through slot for guiding the weir plate.

[0008] As a further technical scheme, the shell has a stepped hole corresponding to the number of the adjusting gears, and the adjusting gears are provided with hexagonal heads and protrude out of the stepped hole.

[0009] As a further technical scheme, the device further comprises scrapers and rollers, the scrapers are hinged to the weir plate and are provided with flexible scraping layers in contact with the weir plate, the rollers are rotatably arranged on the scrapers, and the end cover is provided with a slide channel in which the rollers roll.

[0010] The working principle and advantages of the device are as follows: the height of the weir plate is adjusted to change the size of the overflow port, the adjusting gears are engaged with the teeth on the side of the scroll, so that the scroll can rotate when the adjusting gears rotate, the side of the scroll close to the weir plate is provided with a slide channel, the tail end of the weir plate is provided with a protrusion engaged with the slide channel, the weir plate slides radially driven by the rotation of the scroll, thereby realizing the height adjustment of the overflow liquid level, adjusting the opening of the overflow port, and realizing the stepless and accurate adjustment of the overflow liquid level height, effectively reducing the moisture of the settled product, preventing the filtrate from running coarse, accurately controlling the dehydration effect of the equipment and the product index, compared with the existing technology of disassembling bolts to adjust the height of the weir plate, only the adjusting gears need to be twisted to realize the accurate and stepless adjustment of the overflow liquid level height, greatly shortening the adjustment time and saving time and effort. BRIEF DESCRIPTION OF DRAWINGS

[0011] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0012] Fig. 1 FIG. 1 is a schematic view of the installation structure of the overflow liquid level stepless adjustment device of the horizontal settling centrifuge of the application;

[0013] Fig. 2 FIG. 2 is a schematic view of the structure of the weir plate in the application;

[0014] Fig. 3 FIG. 3 is a schematic view of the structure of the overflow liquid level stepless adjustment device of the horizontal settling centrifuge of the application;

[0015] Fig. 4 FIG. 4 is a schematic view of part of the structure of the overflow liquid level stepless adjustment device of the horizontal settling centrifuge of the application;

[0016] In the drawings: 1, end cover; 2, overflow port; 3, weir plate; 4, scroll; 5, adjusting gear; 6, engagement tooth; 7, scroll slide channel; 8, tooth; 9, shell; 10, fixed slide rail; 11, through groove; 12, stepped hole; 13, scraper; 14, roller; 15, flexible scraping layer; 16, slide channel. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0018] like Figs. 1-4 As shown, this embodiment proposes a stepless adjustment device for the overflow liquid level of a horizontal sedimentation centrifuge, including an end cover 1, wherein the end cover 1 has multiple overflow ports 2, including a weir plate 3, a scroll 4 and an adjusting gear 5. There are multiple weir plates 3, corresponding to the number of the multiple overflow ports 2. The multiple weir plates 3 are slidably arranged on the end cover 1 to control the height of the overflow port 2. The bottom of the weir plate 3 has meshing teeth 6, and a vortex chute 7 is opened on one side of the surface of the scroll 4. The vortex chute 7 cooperates with the meshing teeth 6. The circumferential surface of the scroll 4 has teeth 8, and the adjusting gear 5 is rotatably arranged on the end cover 1 and meshes with the teeth 8.

[0019] In this embodiment, the size of the overflow port 2 is changed by adjusting the height of the weir plate 3, and the adjusting gear 5 is engaged with the teeth 8 on the side of the scroll 4, so that the scroll 4 can rotate accordingly when the adjusting gear 5 is rotated. The scroll 4 has a slideway 16 on the side close to the weir plate 3, and a protrusion is provided at the tail end of the weir plate 3 to engage with the slideway 16. The rotation of the scroll 4 drives the radial sliding of the weir plate 3, thereby realizing the height adjustment of the overflow liquid level, adjusting the opening of the overflow port 2, and realizing stepless and precise adjustment of the overflow liquid level height, effectively reducing the moisture content of the sedimentation product, preventing the filtrate from running coarse, and accurately controlling the dehydration effect of the equipment and the product indicators. Compared with the prior art in which the bolts are disassembled to adjust the height of the weir plate 3, it is only necessary to twist the adjusting gear 5 to realize precise and stepless adjustment of the overflow liquid level height, which greatly shortens the adjustment time and saves time and effort.

[0020] Furthermore,

[0021] The end cover 1 is provided with a housing 9 , and the scroll 4 and the adjusting gear 5 are located in the housing 9 .

[0022] In this embodiment, by arranging the scroll 4 and the outer shell 9 on the flange in sequence, the scroll 4 and the adjusting gear 5 can be sealed in the space formed by the outer shell 9, protecting the gears on the scroll 4 and the adjusting gear 5 from corrosion and increasing their service life. The scroll 4 and the adjusting gear 5 can also be axially fixed so that the scroll 4 can drive the weir plate 3 to slide radially when it rotates.

[0023] Furthermore,

[0024] The end cover 1 is provided with a fixed slide rail 10, the shell 9 has a through slot 11, the weir plate 3 is slidably arranged in the through slot 11, and the weir plate 3 is guided.

[0025] In the embodiment, the weir plate 3 is arranged between the end cover 1 and the fixed slide rail 10, and the weir plate 3 is axially fixed on the end cover 1 through the fixation of the end cover 1 and the fixed slide rail 10, so that the weir plate 3 cannot be separated from the end cover 1, and the overflow liquid level can be effectively adjusted. When the weir plate 3 slides in the radial direction, the weir plate 3 can slide along the slide rail, and the bottom of the weir plate 3 is arranged in the through slot 11 at the bottom of the shell, so that the weir plate 3 is doubly guided and more accurately slides in the radial direction.

[0026] Further, the end cover 1 is provided with a fixed slide rail 10, the shell 9 has a through slot 11, the weir plate 3 is slidably arranged in the through slot 11, and the weir plate 3 is guided.

[0027] The shell 9 has a stepped hole 12 corresponding to the number of the adjusting gears 5, and the top of the adjusting gear 5 is provided with a hexagonal head which protrudes out of the stepped hole 12.

[0028] In the embodiment, the stepped hole 12 is arranged on the shell 9, the rotating shaft matched with the adjusting gear 5 is a stepped shaft, the shaft shoulder of the stepped shaft is matched with the stepped hole 12, has a certain positioning function, prevents the rotating shaft from protruding out, reduces the occupied space, and the hexagonal head is selected to be used at one end of the rotating shaft to protrude out of the shell 9, so that the hexagonal head is convenient to twist, the rotating of the adjusting gear 5 can be realized by twisting the hexagonal head, and since the plurality of adjusting gears 5 are all engaged with the vortex disc 4 and the protrusions at the bottom of the plurality of weir plates 3 are all engaged on the slide 16 of the vortex disc 4, only one adjusting gear 5 needs to be twisted to realize the rotation of the vortex disc 4, so that the plurality of weir plates 3 are adjusted in height at the same time, which is convenient and fast and greatly saves the adjustment time.

[0029] Further, the end cover 1 is provided with a fixed slide rail 10, the shell 9 has a through slot 11, the weir plate 3 is slidably arranged in the through slot 11, and the weir plate 3 is guided.

[0030] The scraper 13 and the roller 14 are arranged on the weir plate 3, the scraper 13 is hingedly connected to the weir plate 3, the scraper 13 is provided with a flexible scraping layer 15 which is in contact with the weir plate 3, the roller 14 is rotatably arranged on the scraper 13, the end cover 1 is provided with a slide 16, and the roller 14 rolls in the slide 16.

[0031] In the embodiment, the scraper 13 is arranged on the weir plate 3, one end of the scraper 13 is hingedly connected to the weir plate 3, the other end of the scraper 13 is rotatably connected to the roller 14, the slide 16 is arranged on the flange plate, and the roller 14 can roll in the slide 16. When the weir plate 3 slides in the radial direction, the scraper 13 can swing around the hinge, and the rubber strip or other cleaning device arranged on the scraper 13 can clean the inner wall of the weir plate 3 by swinging when the weir plate 3 slides in the radial direction, so that the weir plate 3 can be cleaned without disassembly, and the inner wall of the weir plate 3 is prevented from being blocked by sludge, so that the sliding is not affected and the adjustment effect of the overflow liquid level is affected.

[0032] The above merely provides the preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall fall into the protection scope of the present application.

Claims

1. A stepless overflow level adjustment device for a horizontal decanter centrifuge, comprising an end cover (1) having a plurality of overflow ports (2), characterized in that, It includes weir plate (3), scroll (4) and adjusting gear (5), the weir plate (3) has multiple, with multiple the number of overflow port (2) corresponds, multiple the weir plate (3) slidingly arranged on the end cover (1), for controlling the opening of overflow port (2), the weir plate (3) bottom has meshing tooth (6), the scroll (4) surface one side is provided with scroll sliding slot (7), the scroll sliding slot (7) is matched with the meshing tooth (6), the scroll (4) circumferential surface has tooth (8), the adjusting gear (5) rotationally arranged on the end cover (1) and is engaged with the tooth (8); It also includes scraper (13) and roller (14), the scraper (13) has multiple, hinged on the weir plate (3), the scraper (13) has flexible scraping layer (15) on it and is in contact with the weir plate (3), the roller (14) is rotationally arranged on the scraper (13), the end cover (1) has slide (16), the roller (14) rolls in the slide (16).

2. The horizontal decanter centrifuge overflow level stepless adjustment device according to claim 1, characterized in that, The end cover (1) is provided with shell (9), the scroll (4) and the adjusting gear (5) are located in the shell (9).

3. The horizontal decanter centrifuge overflow level stepless adjustment device according to claim 2, characterized in that, The end cover (1) is provided with fixed slide rail (10), the shell (9) has through slot (11), the weir plate (3) bottom is slidingly arranged in the through slot (11), for guiding the weir plate (3).

4. The horizontal decanter centrifuge overflow level stepless adjustment device according to claim 2, characterized in that, The shell (9) has corresponding stepped hole (12) with the number of adjusting gear (5), the core shaft end of adjusting gear (5) projects out of the stepped hole (12).

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