Horizontal screw centrifuge with scraper plate

Abstract

The utility model discloses a horizontal screw centrifuge with scraping plates, which comprises a housing, a rotary drum is rotatably connected in the housing, a screw propeller having speed difference with the rotation of the rotary drum is rotatably connected in the rotary drum, a group of slag outlets uniformly distributed along the center of the rotary drum are arranged at the side end of the rotary drum, and the scraping plates are fixed between every two adjacent slag outlets. Bonded materials can be scraped off through rotation of the scraping plate, a large amount of materials are prevented from being bonded at the slag outlet of the conical rotary drum, the materials can smoothly leave the centrifugal machine and enter a collecting device, and the material scraping device is worthy of application and popularization.

Description

Technical Field

[0001] The utility model relates to the field of centrifuges, in particular to a horizontal screw centrifuge with a scraper plate. Background Art

[0002] In my country's existing centrifuge industry, in order to reduce manufacturing difficulty, facilitate placement and transportation, facilitate maintenance and inspection, and reduce costs, the centrifuge structure design is relatively compact. However, the centrifuge is continuously fed and the slag discharge is large. After long-term operation, solid phase materials with high viscosity, in particular, will adhere to the surrounding of the discharge port after coming out of the drum cone section discharge port. When a certain amount of adhesion occurs, it will make it difficult to collect the solid phase materials.

[0003] Chinese utility model patent CN 219836655 U discloses a large-cone-angle variable-pitch protein decanter centrifuge, comprising a base, the upper end of which is symmetrically fixedly connected to two lower clamping seats via multiple support columns, the upper ends of the lower clamping seats being fixedly connected to an upper clamping seat, a common drum being sandwiched between the lower and upper clamping seats, a spiral blade mounted within the drum, a spiral core tube mounted within the spiral blade, a differential mounted at one end of the drum, a feed port mounted at the other end of the drum, a clear liquid outlet mounted at one end of the drum corresponding to the feed port, a large end cap shaft rotatably connected to one end of the drum via a large end bearing seat, and a small end cap shaft rotatably connected to the other end of the drum via a small end bearing seat, and a solid phase outlet disposed on the lower side of one end of the drum. This patent lacks a scraper on the drum, which can cause highly viscous solids to adhere to the surrounding area of ​​the drum cone discharge port after exiting, making solid phase collection difficult and ultimately preventing the material separation operation. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the above-mentioned prior art and provide a horizontal screw centrifuge with a scraper plate that can scrape off the adhered material by rotation to prevent the material from adhering in large quantities at the slag outlet of the drum cone section, thereby meeting the requirement that the separated solid phase can smoothly leave the centrifuge and enter the collection device.

[0005] The utility model solves its technical problems by adopting a technical solution: this horizontal screw centrifuge with a scraper plate includes a cover, a drum is rotatably connected inside the cover, a spiral propeller is rotatably connected inside the drum and has a speed difference with the drum, a set of slag outlets evenly distributed along the center of the drum are opened on the side end of the drum, and a scraper plate is fixed between two adjacent slag outlets. The function of the drum and the spiral propeller here is to use the differential to enable the drum and the spiral propeller to maintain a constant speed difference, so that the material can be separated into solid and liquid and discharged. The function of the slag outlet here is to discharge the solid phase after the material is separated; the function of the scraper plate here is to scrape off the solid phase with a high viscosity when it adheres to the surrounding of the discharge port, so as to avoid the blockage of the solid phase and the problem of difficulty in collecting the solid phase when a certain amount of solid phase adheres.

[0006] Further improvement, each scraper plate is provided with a transverse through hole. The purpose of the transverse through hole is to reduce the resistance of the solid phase adhering to the discharge port after the scraper plate comes out of the drum cone section, thereby avoiding the resistance of the drum rotation when the scraper plate scrapes the solid phase around the discharge port, and the effect of scraping the solid phase at the discharge port is better.

[0007] Further improvement, a set of sockets are opened on the side of the drum, and each scraper is respectively inserted into the sockets. A set of rotating shafts are rotatably connected to the drum. The bottom end of each rotating shaft is opened with a hexagonal notch. The top of each rotating shaft is fixed with a coaxially arranged threaded rod. The bottom end of each scraper is opened with a threaded channel hole that cooperates with the threaded rod. Gears are fixed on each rotating shaft. A circular ring is rotatably connected to the side of the drum. The end face of the circular ring is fixed with a set of teeth that mesh with each gear. The function of the sockets, hexagonal notches, threaded rods, and threaded channel holes here is to drive the scraper to move inward and outward along the radial direction of the drum, thereby adapting to materials of different viscosities and scraping off solid phases that adhere to the discharge port after exiting the conical section of the drum. The function of the gears, rings, and teeth here is to synchronously drive the rotation of each threaded rod by rotating a rotating shaft, thereby synchronously driving each scraper to move up and down, thereby adapting to materials of different viscosities and scraping off solid phases after centrifugation.

[0008] To further improve the system, a set of balls are installed between the top surface of the ring and the drum, as well as between the bottom surface of the ring and the drum. The function of the balls is to make the ring rotate smoothly and with less resistance, so that the ring can rotate more smoothly and drive the gears to rotate synchronously.

[0009] As a further improvement, the outer contour of each socket is provided with a self-lubricating layer. The function of this self-lubricating layer is to make the scraper move up and down very smoothly, thus preventing the scraper from getting stuck during movement; this self-lubricating layer is made of tin bronze.

[0010] The beneficial effects of the utility model are:

[0011] 1) The high-speed rotation of the scraper can scrape off the solid phase thrown onto the cover from the slag outlet, preventing the solid phase from accumulating at the slag outlet and affecting the discharge of the solid phase;

[0012] 2) The horizontal through holes can reduce the resistance of the scraper to scraping solids;

[0013] 3). The height of the scraper plate can be adjusted to accommodate solids of different viscosities. 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 rotary drum in the utility model;

[0016] Figure 3 for Figure 2 AA cross-section of

[0017] Figure 4 for Figure 3 A local enlarged view of area B;

[0018] Figure 5 for Figure 4 CC cross-section diagram.

[0019] Explanation of the reference numerals: cover 1, drum 2, slag outlet 2-1, socket 2-2, screw propeller 3, scraper 4, transverse through hole 4-1, threaded channel hole 4-2, self-lubricating layer 4-3, rotating shaft 5, hexagonal notch 5-1, threaded rod 5-2, gear 5-3, ring 6, tooth 6-1, ball 7, feed pipe 8. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Referring to the accompanying drawings: This horizontal screw centrifuge with a scraper plate includes a cover 1, a drum 2 is rotatably connected inside the cover 1, a spiral propeller 3 is rotatably connected inside the drum 2 and has a speed difference with the drum 2, and a group of slag outlets 2-1 are evenly distributed along the center of the drum 2 at the side end of the drum 2, and a scraper plate 4 is fixed between two adjacent slag outlets 2-1.

[0022] Each scraper plate 4 is provided with a transverse through hole 4 - 1 .

[0023] A group of sockets 2-2 are provided at the side ends of the drum 2, and each scraper plate 4 is respectively inserted into the sockets 2-2. A group of rotating shafts 5 are rotatably connected to the drum 2, and the bottom end of each rotating shaft 5 is provided with a hexagonal notch 5-1. The top of each rotating shaft 5 is fixed with a coaxially arranged threaded rod 5-2, and the bottom end of each scraper plate 4 is provided with a threaded channel hole 4-2 that is respectively threadedly matched with the threaded rod 5-2. A gear 5-3 is fixed on each rotating shaft 5, and a circular ring 6 is rotatably connected to the side end of the drum 2. A group of teeth 6-1 that mesh with each gear 5-3 are fixed on the end face of the circular ring 6.

[0024] A group of balls 7 are installed between the top surface of the ring 6 and the drum 2 and between the bottom surface of the ring 6 and the drum 2.

[0025] The outer contour of each insertion hole 2-2 is provided with a self-lubricating layer 2-2a.

[0026] The working principle of the utility model 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 material is continuously introduced into the inner cylinder of the screw pusher 3 from the feed pipe 8 and accelerated and then enters the drum 2. 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, which is pushed by the spiral propulsion blades on the screw pusher 3 to continuously push the deposited solid phase to the cone section of the drum 2 and thrown out through the slag outlet 2-1. The clear liquid approaches the inner wall side of the drum 2 and continuously moves toward the right side and overflows through the liquid outlet at the other end of the drum 2; the solid phase is thrown out from the slag outlet 2-1 into the interior of the cover 1, and a solid phase collecting device is provided under the cover 1. When the relatively viscous solid phase is thrown out from the slag outlet 2-1, the clear liquid will continue to move to the right side and overflow through the liquid outlet at the other end of the drum 2. After discharge, the solid phase that will continuously adhere to the slag outlet 2-1 and accumulate on the cover 1 will be scraped off by the scraper plate 4 installed on the cone section of the drum, so that the solid phase with viscosity will not adhere to the slag outlet 2-1 and the surrounding area in large quantities and affect the collection of the solid phase, and the height of the scraper plate 4 can be adjusted according to the solid phase with different viscosities, that is, use a tool to rotate any one of the rotating shafts 5, the rotation of the rotating shaft 5 will synchronously drive the gear 5-3 to rotate and the threaded rod 5-2 to rotate. When the gear 5-3 rotates, the teeth 6-1 on the ring 6 will drive the ring 6 to rotate, thereby synchronously driving the gears 5-3 to rotate together, and then driving any one of the rotating shafts 5 to rotate, which will synchronously drive the rotating shafts 5 and the threaded rods 5-2 to rotate, so that the scraper plates 4 will rise or fall synchronously (such as Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 As shown), it is suitable for scraping off solid phases of different viscosities adhered to the slag outlet 2-1 and accumulated on the cover 1, and 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 decanter centrifuge with a scraper, comprising a housing (1), a drum (2) rotatably connected to the housing (1), a screw propeller (3) rotatably connected to the drum (2) and having a speed difference with the drum (2), wherein: A group of slag outlets (2-1) are evenly distributed along the center of the drum (2) at the side end of the drum (2), and a scraper plate (4) is fixed between two adjacent slag outlets (2-1).

2. A decanter centrifuge with a scraper according to claim 1, characterized in that: Each of the scraper plates (4) is provided with a transverse through hole (4-1).

3. A decanter centrifuge with a scraper according to claim 1, characterized in that: The side ends of the rotating drum (2) are each provided with a group of sockets (2-2), and each of the scraper plates (4) is respectively plugged into the sockets (2-2). The rotating drum (2) is rotatably connected to a group of rotating shafts (5), the bottom ends of each of the rotating shafts (5) are provided with inner hexagonal notches (5-1), the top ends of each of the rotating shafts (5) are fixed with coaxially arranged threaded rods (5-2), the bottom ends of each of the scraper plates (4) are provided with threaded channel holes (4-2) respectively threadedly engaged with the threaded rods (5-2), and each of the rotating shafts (5) is fixed with a gear (5-3). The side ends of the rotating drum (2) are rotatably connected to a ring (6), and the end surface of the ring (6) is fixed with a group of teeth (6-1) meshing with each of the gears (5-3).

4. A decanter centrifuge with a scraper according to claim 3, characterized in that: A group of balls (7) are installed between the top surface of the circular ring (6) and the rotating drum (2), and between the bottom surface of the circular ring (6) and the rotating drum (2).

5. A decanter centrifuge with a scraper according to claim 3, characterized in that: The outer contour of each of the sockets (2-2) is provided with a self-lubricating layer (2-2a).

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