Operation method of slag salvaging device

Abstract

The invention relates to an operation method of a slag salvaging device. The method comprises the following steps that S1, the slag salvaging device is controlled to move to the position above a charging pool through a crown block; s2, a telescopic oil cylinder is started, and a grab bucket is opened; s3, the grab bucket descends into a charging pool; s4, a telescopic oil cylinder is started, and the grab bucket is closed; meanwhile, a lifting oil cylinder is started to control the grab bucket to lift; in the closing process of the grab bucket, the bucket tip of the grab bucket moves linearly; and S5, after the grab bucket ascends to the safe position, the residues in the grab bucket are transferred to the designated position under the driving of the crown block. According to the method, the hopper tip can move horizontally in the material grabbing process, and the pool bottom cannot be damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of slag scooping devices, and in particular to an operating method of a slag scooping device. Background Art

[0002] The electrolytic production process includes five major operations: pole change, aluminum tapping, busbar lifting, quenching effect, and tank maintenance. The aluminum electrolysis multifunctional unit is a major core equipment in the electrolytic aluminum production process. It is a key field of nonferrous metallurgical special equipment in my country. It has now fully realized domestic substitution for imports. The electrolytic production process has extreme conditions such as strong magnetism, high temperature, heavy dust, high current, and toxic and harmful gas emissions. In addition, the carbon anode is continuously consumed during the entire electrolytic reaction. In order to allow the aluminum electrolysis reaction to continue, the anode needs to be replaced regularly. During the pole change process, the residue in the aluminum liquid needs to be cleaned. Whether the slag removal operation is thorough and good directly affects the completion of various technical indicators of electrolytic production, and even affects the safety of the electrolytic cell and operators. Therefore, it is of great significance to realize automated slag removal. At present, in the industry, the residue is captured by grabbing buckets. During the grabbing process, that is, during the closing process of the grabbing bucket, the bucket tip will have a vertical displacement. However, during the closing process of the grabbing bucket, the bucket tip will have a vertical displacement. There is a possibility that the bucket tip touches the bottom of the pool and causes damage to the bottom of the loading pool. In order to prevent the bucket tip from damaging the pool bottom during the grabbing process, it is necessary to ensure that the bucket tip moves horizontally during the closing process. Currently, this method depends entirely on the operator's experience and is difficult to operate.

[0003] The prior art CN201610325336.4 discloses a design method for realizing the bottom translation of the aluminum electrolysis slag grab, including a cylinder, a support frame, a balance beam and left and right grabs, the bottom of the hydraulic lifting column is connected to the left end or the right end of the balance beam, and the balance beam is connected to the slider on the upper beam of the support frame through a connecting rod; the left and right grabs are respectively connected to the two sides of the lower beam of the support frame through left and right hanging plates, the left grab or the right grab is connected to the cylinder piston rod through a driving plate, and at the same time, the left grab or the right grab is connected to two driving rods, one driving rod is connected to the support frame through a slider, and the other driving rod is connected to the hanging plate of the right grab or the left grab; the tail of the cylinder is connected to the left or right side of the support frame.

[0004] In the prior art 1, there is no disclosure of a technical solution for preventing the grab bucket tip from vertically displacing during the slag scooping process. Summary of the invention

[0005] The technical problem solved by the present invention is to overcome the problems existing in the prior art and provide a method for operating a slag scooping device that will not damage the bottom of a pool. The slag scooping device comprises a telescopic frame connected to a crane, a lifting cylinder connected to the telescopic frame to control the telescopic frame to be extended or retracted, a bucket cover connected to the bottom of the telescopic frame, a grab bucket connected to the bottom of the bucket cover, and a telescopic cylinder connected to the telescopic frame; the telescopic cylinder is connected to the grab bucket to control the closure of the grab bucket; the method comprises the following steps:

[0006] S1: The slag scooping device is controlled by the overhead crane to move to the top of the charging pool;

[0007] S2: Start the telescopic cylinder and open the grab bucket;

[0008] S3: The grab bucket descends into the loading pool;

[0009] S4: Start the telescopic cylinder to close the grab bucket; at the same time, start the lifting cylinder to control the lifting of the grab bucket; during the closing process of the grab bucket, the bucket tip moves in a straight line;

[0010] S5: After the grab bucket rises to a safe position, the residue in the grab bucket is transferred to a designated location under the drive of the overhead crane.

[0011] Preferably, in step S4, during the closing process of the grab bucket, the calculation formula for the lifting amount Δh of the lifting cylinder is:

[0012]

[0013] Wherein, a is the distance from the hinge point where the bucket flap is connected to the grab cover to the bucket tip; b is the distance from the hinge point where the bucket flap is connected to the grab cover to the hinge point where the telescopic cylinder is connected to the bucket flap; c is the distance from the hinge point where the telescopic cylinder is connected to the grab cover to the hinge point where the bucket flap is connected to the grab cover; L is the distance from the hinge point where the telescopic cylinder is connected to the bucket flap to the hinge point where the telescopic cylinder is connected to the grab cover when the grab is closed; △L is the telescopic amount of the cylinder rod of the telescopic cylinder; h is the height in the vertical direction from the bucket tip to the hinge point where the bucket flap is connected to the grab cover when the grab is fully opened; β is the angle between the hinge point where the bucket flap is connected to the grab cover and the bucket tip relative to the vertical direction.

[0014] Preferably, the telescopic amount of the cylinder rod is measured by a sensor on the telescopic cylinder.

[0015] Preferably, a sensor for measuring the lifting amount is provided on the lifting cylinder.

[0016] Preferably, the slag scooping device includes a telescopic frame connected to the overhead crane, a lifting cylinder connected to the telescopic frame to control the telescopic frame to extend and retract, a bucket cover connected to the bottom of the telescopic frame, a left bucket petal and a right bucket petal connected to the bottom of the bucket cover, and a telescopic cylinder connected to the telescopic frame; the cylinder rod of the telescopic cylinder is hinged to the right bucket petal; the left bucket petal and the right bucket petal are respectively provided with bucket ears hinged to the bucket cover, and a connecting rod is also hinged between the two bucket ears.

[0017] Preferably, the right bucket is provided with an articulated seat hinged to the cylinder rod.

[0018] Preferably, the telescopic frame includes a fixed frame connected to the overhead travelling crane and a sliding frame sliding relative to the fixed frame, and the bucket cover is connected to the sliding frame.

[0019] Preferably, a guide wheel set is arranged between the fixed frame and the sliding frame.

[0020] Preferably, the slag scooping device further comprises an anti-sway bar connected to the telescopic frame, and the anti-sway bar is also connected to other devices.

[0021] Preferably, a bearing seat connected to the overhead travelling crane is provided on the top of the telescopic frame.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1) When the grab bucket is closed to grab materials, the lifting cylinder is started synchronously to realize vertical lifting of the grab bucket, thereby eliminating the vertical displacement of the bucket tip during the closing process of the grab bucket, and finally ensuring that the bucket tip moves in a straight line during the closing process of the grab bucket, thereby preventing the bucket tip from damaging the pool bottom during the grabbing process.

[0024] 2) Through this method, each time the material is grabbed, the bucket tip can be as close to the bottom of the pool as possible, thereby improving the grabbing efficiency of the grab bucket. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a flow chart of a slag scooping device operation method of the present invention;

[0026] Figure 2 A grab bucket model diagram of a slag scooping device operation method of the present invention;

[0027] Figure 3 A mathematical model diagram of a slag scooping device operation method of the present invention;

[0028] Figure 4 The present invention is a schematic diagram of the structure of a slag scooping device in a slag scooping device operation method. DETAILED DESCRIPTION

[0029] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0031] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0032] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0034] Example 1

[0035] like Figures 1 to 3 As shown, a slag scooping device operation method is disclosed, and the method comprises the following steps:

[0036] S1: The slag scooping device is controlled by the overhead crane to move to the top of the charging pool;

[0037] S2: Start the telescopic cylinder and open the grab bucket;

[0038] S3: The grab bucket descends into the loading pool;

[0039] S4: Start the telescopic cylinder to close the grab bucket; at the same time, start the lifting cylinder to control the lifting of the grab bucket; during the closing process of the grab bucket, the bucket tip moves in a straight line;

[0040] S5: After the grab bucket rises to a safe position, the residue in the grab bucket is transferred to a designated location under the drive of the overhead crane.

[0041] The slag scooping device is mainly used in aluminum electrolysis operations. The slag scooping device is connected to the overhead crane and is displaced by the overhead crane. When the slag in the charging pool needs to be scooped, the overhead crane is controlled to move the slag scooping device to the top of the charging pool. The telescopic cylinder is started and the grab is fully opened by the telescopic cylinder. The grab bucket is controlled to descend to the charging pool by the overhead crane or the lifting cylinder. At this time, the telescopic cylinder is started to gradually close the grab bucket. During the closing process of the grab bucket, the bucket tip will not only be displaced in the horizontal direction, but also in the vertical direction. Therefore, during the closing process of the grab bucket, the lifting cylinder is started at the same time to control the lifting of the grab bucket, thereby eliminating the vertical displacement of the bucket tip when the grab bucket is closed. Finally, during the closing process of the grab bucket, the bucket tip will only be displaced in the horizontal direction, thereby preventing the bucket tip from contacting the bottom of the charging pool when the grab bucket is grabbing materials, and preventing the bucket tip from damaging the bottom of the pool.

[0042] After the grab is fully closed, the grab is lifted to a suitable safe position by the overhead crane or lifting cylinder, the residue in the grab is transferred to the specified unloading displacement by the overhead crane, the telescopic cylinder is started again, and the grab is opened to realize unloading.

[0043] In this embodiment, when the grab bucket is closed to grab materials, the lifting cylinder is started synchronously to realize vertical lifting of the grab bucket, eliminating the vertical displacement of the bucket tip during the closing process of the grab bucket, and ultimately ensuring that the bucket tip moves in a straight line during the closing process of the grab bucket, thereby preventing the bucket tip from damaging the pool bottom during the grabbing process.

[0044] Example 2

[0045] A slag scooping device operation method is disclosed, the method comprising the following steps:

[0046] S1: The slag scooping device is controlled by the overhead crane to move to the top of the charging pool;

[0047] S2: Start the telescopic cylinder and open the grab bucket;

[0048] S3: The grab bucket descends into the loading pool;

[0049] S4: Start the telescopic cylinder to close the grab bucket; at the same time, start the lifting cylinder to control the lifting of the grab bucket; during the closing process of the grab bucket, the bucket tip moves in a straight line;

[0050] S5: After the grab bucket rises to a safe position, the residue in the grab bucket is transferred to a designated location under the drive of the overhead crane.

[0051] The difference between this embodiment and embodiment 1 is that during the closing process of the grab bucket, the calculation formula for the lifting amount △h of the lifting cylinder is:

[0052]

[0053] Wherein, a is the distance from the hinge point where the bucket flap is connected to the grab cover to the bucket tip; b is the distance from the hinge point where the bucket flap is connected to the grab cover to the hinge point where the telescopic cylinder is connected to the bucket flap; c is the distance from the hinge point where the telescopic cylinder is connected to the grab cover to the hinge point where the bucket flap is connected to the grab cover; L is the distance from the hinge point where the telescopic cylinder is connected to the bucket flap to the hinge point where the telescopic cylinder is connected to the grab cover when the grab is closed; △L is the telescopic amount of the cylinder rod of the telescopic cylinder; h is the height in the vertical direction from the bucket tip to the hinge point where the bucket flap is connected to the grab cover when the grab is fully opened; β is the angle between the hinge point where the bucket flap is connected to the grab cover and the bucket tip relative to the vertical direction.

[0054] For easier understanding, refer to Figure 2 , Figure 3 . Figure 2 In the figure, point A is the bucket tip, point B is the hinge point between the oil cylinder and the bucket petal, point O is the hinge point between the bucket petal and the grab bucket cover, and point C is the hinge point between the oil cylinder and the grab bucket cover.

[0055] Connect the above four points as shown in the figure. Figure 3 As shown, point O is used as the vertical auxiliary line. Let OA = a, OB = b, OC = c; β is the angle between OA and the vertical line when the grab is fully opened; L is the length of BC when the grab is closed, △L is the extension of the cylinder rod; h is the height of points A and O in the vertical direction when the grab is fully opened, and △h is the height difference of point A compared to the starting position as the grab changes from opening to closing.

[0056] In this embodiment, the extension and retraction amount of the cylinder rod can be measured by a sensor on the telescopic cylinder.

[0057] In order to further confirm the specific lifting height of the lifting cylinder, the actual lifting amount of the lifting cylinder can also be measured by a sensor on the lifting cylinder.

[0058] In this embodiment, by calculating the extension and retraction amount of the cylinder rod, it is possible to know the vertical displacement of the bucket tip during the closing process of the grab bucket. The corresponding lifting and lowering of the lifting cylinder can ensure that the bucket tip will not move in the vertical direction during the closing process of the grab bucket, and ensure that the bucket tip will only move in translation, thereby preventing the bucket tip from damaging the pool bottom.

[0059] Example 3

[0060] like Figure 4 As shown, a slag scooping device operation method is disclosed, and the method comprises the following steps:

[0061] S1: The slag scooping device is controlled by the overhead crane to move to the top of the charging pool;

[0062] S2: Start the telescopic cylinder and open the grab bucket;

[0063] S3: The grab bucket descends into the loading pool;

[0064] S4: Start the telescopic cylinder to close the grab bucket; at the same time, start the lifting cylinder to control the lifting of the grab bucket; during the closing process of the grab bucket, the bucket tip moves in a straight line;

[0065] S5: After the grab bucket rises to a safe position, the residue in the grab bucket is transferred to a designated location under the drive of the overhead crane.

[0066] In this embodiment, the slag scooping device includes a telescopic frame 1 connected to the overhead crane, a lifting cylinder 2 connected to the telescopic frame 1 to control the telescopic frame 1 to extend and retract, a bucket cover 3 connected to the bottom of the telescopic frame 1, a left bucket petal 4 and a right bucket petal 5 connected to the bottom of the bucket cover 3, and a telescopic cylinder 6 connected to the telescopic frame 1; the cylinder rod of the telescopic cylinder 6 is hinged to the right bucket petal 5; the left bucket petal 4 and the right bucket petal 5 are respectively provided with bucket ears 7 hinged to the bucket cover 3, and a connecting rod 8 is also hinged between the two bucket ears 7.

[0067] The telescopic rod of the telescopic oil cylinder 6 is connected to the right bean 5. When the telescopic oil cylinder 6 is started, it will drive the right bean 5 to move. A connecting rod 8 is connected between the right bean 5 and the left bean 4, so that when the right bean 5 moves, the left bean 4 will also move together. Thus, the closing or opening of the grab bucket is achieved through the telescopic oil cylinder 6.

[0068] Specifically, a hinge seat can be provided on the right bean shell 5, and the cylinder rod of the telescopic cylinder 6 is connected to the hinge seat.

[0069] The telescopic frame 1 comprises a fixed frame connected to the overhead travelling crane and a sliding frame sliding relative to the fixed frame, and the bucket cover 3 is connected to the sliding frame.

[0070] In order to facilitate the sliding frame to slide up and down more stably, a guide wheel group is arranged between the fixed frame and the sliding frame.

[0071] In order to prevent the grab bucket from shaking, the slag scooping device further comprises an anti-sway bar 9 connected to the telescopic frame, and the anti-sway bar 9 is also connected to other adjacent devices.

[0072] In order to facilitate the connection between the slag scooping device and the overhead travelling crane, a bearing seat connected to the overhead travelling crane may be arranged on the top of the telescopic frame.

[0073] Obviously, the above embodiments are merely examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for operating a slag scooping device, the slag scooping device comprising a telescopic frame connected to a crown block, a lifting cylinder connected to the telescopic frame to control the telescopic frame to be extended or retracted, a bucket cover connected to the bottom of the telescopic frame, a grab bucket connected to the bottom of the bucket cover, and a telescopic cylinder connected to the telescopic frame; the telescopic cylinder is connected to the grab bucket to control the closure of the grab bucket; characterized in that: The method comprises the following steps: S1: The slag scooping device is controlled by the overhead crane to move to the top of the charging pool; S2: Start the telescopic cylinder and open the grab bucket; S3: The grab bucket descends into the loading pool; S4: Start the telescopic cylinder to close the grab bucket; at the same time, start the lifting cylinder to control the lifting of the grab bucket; during the closing process of the grab bucket, the bucket tip moves in a straight line; S5: After the grab bucket rises to a safe position, the residue in the grab bucket is transferred to a designated location under the drive of the overhead crane.

2. A slag scooping device operation method according to claim 1, characterized in that: In step S4, during the closing process of the grab bucket, the calculation formula for the lifting amount Δh of the lifting cylinder is: Wherein, a is the distance from the hinge point where the bucket flap is connected to the grab cover to the bucket tip; b is the distance from the hinge point where the bucket flap is connected to the grab cover to the hinge point where the telescopic cylinder is connected to the bucket flap; c is the distance from the hinge point where the telescopic cylinder is connected to the grab cover to the hinge point where the bucket flap is connected to the grab cover; L is the distance from the hinge point where the telescopic cylinder is connected to the bucket flap to the hinge point where the telescopic cylinder is connected to the grab cover when the grab is closed; △L is the telescopic amount of the cylinder rod of the telescopic cylinder; h is the height in the vertical direction from the bucket tip to the hinge point where the bucket flap is connected to the grab cover when the grab is fully opened; β is the angle between the hinge point where the bucket flap is connected to the grab cover and the bucket tip relative to the vertical direction.

3. A slag scooping device operation method according to claim 2, characterized in that: The extension and contraction amount of the oil cylinder rod is measured by a sensor on the telescopic oil cylinder.

4. A slag scooping device operation method according to claim 1, characterized in that: The lifting cylinder is provided with a sensor for measuring the lifting amount.

5. A slag scooping device operation method according to claim 1, characterized in that: The bottom of the bucket cover is connected with a left bucket petal and a right bucket petal; the cylinder rod of the telescopic oil cylinder is hinged to the right bucket petal; the left bucket petal and the right bucket petal are respectively provided with bucket ears hinged to the bucket cover, and a connecting rod is also hinged between the two bucket ears.

6. A slag scooping device operation method according to claim 1, characterized in that: The right bucket is provided with an articulated seat which is articulated with the oil cylinder rod.

7. A slag scooping device operation method according to claim 6, characterized in that: The telescopic frame comprises a fixed frame connected to the overhead travelling crane and a sliding frame sliding relative to the fixed frame, and the bucket cover is connected to the sliding frame.

8. A slag scooping device operation method according to claim 1, characterized in that: A guide wheel group is arranged between the fixed frame and the sliding frame.

9. A slag scooping device operation method according to claim 1, characterized in that: The slag scooping device also includes an anti-sway bar connected to the telescopic frame, and the anti-sway bar is also connected to other devices.

10. A slag scooping device operation method according to claim 1, characterized in that: A bearing seat connected to the overhead travelling crane is arranged on the top of the telescopic frame.

Images