Scraping mechanism for small crystal grains in distributed crystallization method

Abstract

The utility model provides a scraping mechanism for small crystal grains in a distributed crystallization method, and aims to solve the technical problem that the reduction speed of the outer diameter of a graphite cooling pipe is too high in the process of scraping crystals on the graphite cooling pipe. The scraping mechanism is arranged on a graphite cooling pipe, and comprises a support ring, a scraping plate and a scraping plate, wherein the support ring is movably arranged on the graphite cooling pipe; the middle parts of the supporting pieces are rotationally arranged on the supporting ring; the scraping plates are arranged at one ends of all the supporting pieces in a one-to-one correspondence mode, and all the scraping plates can form a complete circular structure and are attached to the circumferential direction of the graphite cooling pipe; the output end of the first driving part is connected with the other ends of the supporting parts, and the first driving part is used for driving all the supporting parts to rotate; the output end of the second driving part is connected with the supporting ring, and the second driving part is used for driving the supporting ring to reciprocate in the length direction of the graphite cooling pipe; the second driving piece is further connected with the first driving piece. The scraping mechanism has the advantage of greatly reducing the reduction speed of the outer diameter size of the graphite cooling pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of producing high-purity aluminum, in particular to a scraping mechanism for small crystal grains in a distributed crystallization method. Background Art

[0002] The distributed crystallization method is an aluminum refining method that utilizes the segregation phenomenon of alloy solidification. The electrolytic aluminum liquid is placed in a graphite crucible, and the gas in the graphite cooling tube cools the aluminum liquid. Crystals precipitate on the outer wall of the graphite cooling tube, and then the crystals on the outer surface of the graphite cooling tube are scraped off and fall to the bottom of the crucible. Finally, by applying compression force and other processes, the production of high-purity aluminum is achieved.

[0003] In the prior art, the crystals are scraped off by moving a graphite ring up and down outside a graphite cooling tube. Since graphite is relatively soft and the graphite ring rubs against the graphite cooling tube during the up and down movement, the outer diameter of the graphite cooling tube decreases very quickly, so that some crystals cannot be scraped off. Utility Model Content

[0004] Aiming at the technical problem that the outer diameter of the graphite cooling tube decreases too quickly during the process of scraping off crystals on the graphite cooling tube, the utility model provides a scraping mechanism for small grains in a distributed crystallization method, which has the advantage of greatly reducing the speed at which the outer diameter of the graphite cooling tube decreases.

[0005] The technical solution of the utility model is:

[0006] A scraping mechanism for small crystal grains in a distributed crystallization method is provided on a graphite cooling tube, comprising:

[0007] A support ring, movably disposed on the graphite cooling tube;

[0008] A plurality of support members, wherein the middle parts of the support members are rotatably disposed on the support ring;

[0009] A plurality of scrapers are arranged on one end of all the supporting members in a one-to-one correspondence, and all the scrapers can form a complete circular structure and fit on the circumference of the graphite cooling tube;

[0010] A first driving member, whose output end is connected to the other end of the supporting member and is used to drive all the supporting members to rotate;

[0011] A second driving member, whose output end is connected to the support ring and is used to drive the support ring to reciprocate along the length direction of the graphite cooling tube;

[0012] Wherein, the second driving member is also connected to the first driving member.

[0013] Optionally, the support member is a Z-shaped structure, and one corner of the support member is rotatably connected to the support ring;

[0014] When the scraper is in contact with the cylindrical surface of the graphite cooling tube, the top end of the support member is in a horizontal direction.

[0015] Optionally, it also includes:

[0016] A first connecting rod, one end of which is rotatably connected to the top end of the supporting member;

[0017] A movable ring, sleeved on the graphite cooling tube and located above the support ring, the movable ring being rotatably connected to the other end of the first connecting rod;

[0018] Wherein, the output end of the first driving member is connected to the movable ring.

[0019] Optionally, it also includes:

[0020] A second connecting rod, one end of which is connected to the supporting ring and the other end of which is vertically arranged upward;

[0021] A connecting ring is sleeved on the graphite cooling tube and is located above the movable ring. The top surface of the connecting ring is connected to the output end of the second driving member, and the bottom surface of the connecting ring is connected to an end of the first driving member away from the movable ring.

[0022] Optionally, the connecting ring is arranged on a sleeve, and the sleeve is movably sleeved on the graphite cooling tube;

[0023] The movable ring is movably arranged on the sleeve, and the top end of the second connecting rod is connected to the bottom end of the sleeve.

[0024] Optionally, a limiting ring is provided at the bottom of the sleeve, and the outer diameter of the limiting ring is larger than the inner diameter of the movable ring.

[0025] Optionally, a plurality of first driving members are arranged around the sleeve, and the first driving members include cylinders.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] First, the support ring is sleeved on the graphite cooling tube, and then the support ring is driven to move on the graphite cooling tube by the second driving member, thereby driving all scrapers to move up and down outside the graphite cooling tube to scrape off the crystals on the graphite cooling tube.

[0028] Since the scraper is rotatably connected to the support ring through the support member, and the support member can be driven to rotate on the support ring by the first driving member, when the second driving member drives the support ring to move downward, the first driving member drives the support member to rotate, so that the inner side of the scraper contacts the outer surface of the graphite cooling tube; when the second driving member drives the support ring to move upward, the first driving member drives the support member to rotate, so that the scraper is separated from the graphite cooling tube during the upward movement.

[0029] In this technical solution, the scraper will contact the graphite cooling tube only when scraping the crystal downwards, so that the friction time between the scraper and the graphite cooling tube is reduced to half of the original time, thereby increasing the practical time of the graphite cooling tube by at least twice. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0032] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0033] Figure 3 for Figure 1 A magnified schematic diagram of point B in the middle. DETAILED DESCRIPTION

[0034] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0035] 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", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art, 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. 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, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings. Example

[0038] See also Figure 1-Figure 3 A scraping mechanism for small grains in a distributed crystallization method is provided on a graphite cooling tube 1. The scraping mechanism includes a support ring 2, a support member 3, a scraper 4, a first driving member 5 and a second driving member 6.

[0039] Specifically, the cross section of the support ring 2 is circular, the inner diameter of the support ring 2 is larger than the outer diameter of the graphite cooling tube 1 , the support ring 2 is sleeved on the graphite cooling tube 1 , and the axis of the support ring 2 is colinear with the axis of the graphite cooling tube 1 .

[0040] A plurality of support members 3 are arranged on the support ring 2, and the middle of the support member 3 is connected to the support ring 2. One end of the support member 3 is located below the support ring 2, and this end of the support member 3 is connected to the scraper 4. A plurality of scrapers 4 are connected to all the support members 3 in a one-to-one correspondence.

[0041] The scraper 4 is arc-shaped, and all the scrapers 4 are connected end to end to form a circular structure, the inner diameter of which is equal to the outer diameter of the graphite cooling tube 1 .

[0042] The output end of the first driving member 5 is connected to the end of the support member 3 away from the scraper 4, and is used to drive the support member 3 to rotate on the support ring 2. The output end of the second driving member 6 is connected to the support ring 2, and is used to drive the support ring 2 to reciprocate in the length direction of the graphite cooling tube 1, and the output end of the second driving member 6 is also connected to the first driving member 5, and can drive the first driving member 5 to reciprocate in the length direction of the graphite cooling tube 1.

[0043] The working principle of this embodiment is that the scraper 4 is rotatably connected to the support ring 2 through the support member 3, and the support member 3 can be driven to rotate on the support ring 2 by the first driving member 5. Therefore, when the second driving member 6 drives the support ring 2 to move downward, the first driving member 5 drives the support member 3 to rotate, so that the inner side of the scraper 4 contacts the outer surface of the graphite cooling tube 1; when the second driving member 6 drives the support ring 2 to move upward, the first driving member 5 drives the support member 3 to rotate, so that the scraper 4 is separated from the graphite cooling tube 1 in the process of moving upward.

[0044] In this technical solution, the scraper 4 will contact the graphite cooling tube 1 only when scraping the crystal downwards, so that the friction time between the scraper 4 and the graphite cooling tube 1 is reduced to half of the original time, thereby increasing the practical time of the graphite cooling tube 1 by at least twice.

[0045] In one specific embodiment:

[0046] The support member 3 is a Z-shaped structure, a corner point at the top is rotatably connected to the support ring 2, one end point at the top is connected to the output end of the first driving member 5, and one end point at the bottom is connected to the scraper 4.

[0047] When all the scrapers 4 are in contact with the surface of the graphite cooling tube 1 , one end of the top of the support member 3 is arranged in a horizontal direction.

[0048] In this embodiment, the top end of the support member 3 is extended in a direction away from the graphite cooling tube 1 , so that when the first driving member 5 drives the support member 3 to rotate, the support member 3 has sufficient space.

[0049] In another specific embodiment:

[0050] The scraping mechanism also includes a first connecting rod 7 and a movable ring 8, wherein one end of the first connecting rod 7 is rotatably connected to one end of the top of the support member 3, and the other end of the first connecting rod 7 is arranged upward and rotatably connected to the movable ring 8.

[0051] The movable ring 8 is sleeved on the graphite cooling tube 1 and is located above the support ring 2. The output end of the first driving member 5 is connected to the movable ring 8.

[0052] In this embodiment, the first driving member 5 is used to drive the movable ring 8 to reciprocate along the axial direction of the graphite cooling tube 1, thereby driving the support member 3 to rotate on the support ring 2 through the rotation connection between the two ends of the first connecting rod 7 and the movable ring 8 and the support member 3.

[0053] In another specific embodiment:

[0054] The scraping mechanism further includes a second connecting rod 9 and a connecting ring 10 . One end of the second connecting rod 9 is fixedly arranged on the supporting ring 2 , and the other end of the second connecting rod 9 is vertically arranged upward along the axis direction of the graphite cooling tube 1 and connected to the connecting ring 10 .

[0055] The connecting ring 10 is sleeved on the graphite cooling tube 1 and is located above the movable ring 8. The output end of the second driving member 6 is connected to the movable ring 8, and the first driving member 5 is arranged between the connecting ring 10 and the movable ring 8.

[0056] In this embodiment, the second driving member 6 for driving the support ring 2 to move is arranged above the graphite cooling tube 1 by arranging the second connecting rod 9, thereby preventing the second driving member 6 from being affected by the high temperature in the crucible. By arranging the connecting ring 10, the output end of the second driving member 6 can be connected to the first driving member 5.

[0057] In another specific embodiment:

[0058] The connecting ring 10 is arranged on a sleeve 11 , the sleeve 11 is movably sleeved on the graphite cooling tube 1 , the movable ring 8 is movably arranged on the sleeve 11 , and the top end of the second connecting rod 9 is fixedly connected to the bottom end of the sleeve 11 .

[0059] By providing the sleeve 11, the first driving member 5 and the graphite cooling tube 1 are isolated, and support is provided for the sliding of the movable ring 8. At the same time, the number of second connecting rods 9 between the sleeve 11 and the support ring 2 can be increased, thereby improving the balance of the force acting on the support ring 2.

[0060] In another specific embodiment:

[0061] A limiting ring 12 is provided at the bottom of the sleeve 11 . The outer diameter of the limiting ring 12 is greater than the inner diameter of the movable ring 8 . The limiting ring 12 is provided to limit the displacement of the movable ring 8 .

[0062] In another specific embodiment:

[0063] A plurality of first driving members 5 are arranged around the sleeve 11 . The first driving member 5 comprises a short-stroke cylinder, a cylinder body end of the cylinder is connected to the connecting ring 10 , and a piston rod end of the cylinder is connected to the movable ring 8 .

[0064] By providing a plurality of synchronously moving first driving members 5, sufficient pressure is provided for the scraper 4 so that the scraper 4 will not jump on the graphite cooling tube 1, thereby ensuring that all crystals on the graphite cooling tube 1 can be scraped off each time the scraper 4 moves downward.

[0065] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A mechanism for scraping off small crystal grains in a distributed crystallization method, arranged on a graphite cooling tube, characterized in that: include: A support ring, movably disposed on the graphite cooling tube; A plurality of support members, wherein the middle parts of the support members are rotatably disposed on the support ring; A plurality of scrapers are arranged on one end of all the supporting members in a one-to-one correspondence, and all the scrapers can form a complete circular structure and fit on the circumference of the graphite cooling tube; A first driving member, whose output end is connected to the other end of the supporting member and is used to drive all the supporting members to rotate; A second driving member, whose output end is connected to the support ring and is used to drive the support ring to reciprocate along the length direction of the graphite cooling tube; Wherein, the second driving member is also connected to the first driving member.

2. The scraping mechanism for small crystal grains in the distributed crystallization method according to claim 1, characterized in that: The support member is a Z-shaped structure, and one corner of the support member is rotatably connected to the support ring; When the scraper is in contact with the cylindrical surface of the graphite cooling tube, the top end of the support member is in a horizontal direction.

3. The scraping mechanism for small crystal grains in the distributed crystallization method according to claim 2, characterized in that: Also includes: A first connecting rod, one end of which is rotatably connected to the top end of the supporting member; A movable ring, sleeved on the graphite cooling tube and located above the support ring, the movable ring being rotatably connected to the other end of the first connecting rod; Wherein, the output end of the first driving member is connected to the movable ring.

4. The scraping mechanism for small crystal grains in the distributed crystallization method according to claim 3, characterized in that: Also includes: A second connecting rod, one end of which is connected to the supporting ring and the other end of which is vertically arranged upward; A connecting ring is sleeved on the graphite cooling tube and is located above the movable ring. The top surface of the connecting ring is connected to the output end of the second driving member, and the bottom surface of the connecting ring is connected to an end of the first driving member away from the movable ring.

5. The scraping mechanism for small crystal grains in the distributed crystallization method according to claim 4, characterized in that: The connecting ring is arranged on a sleeve, and the sleeve is movably sleeved on the graphite cooling tube; The movable ring is movably arranged on the sleeve, and the top end of the second connecting rod is connected to the bottom end of the sleeve.

6. The scraping mechanism for small crystal grains in the distributed crystallization method according to claim 5, characterized in that: A limiting ring is provided at the bottom of the sleeve, and the outer diameter of the limiting ring is greater than the inner diameter of the movable ring.

7. The scraping mechanism for small crystal grains in the distributed crystallization method according to claim 6, characterized in that: A plurality of first driving members are arranged around the sleeve, and the first driving members include cylinders.

Images