Ladle side slagging-off device for nodular cast iron pipe production

Abstract

The utility model relates to the field of nodular cast iron pipe production, and particularly discloses a ladle side slagging-off device for nodular cast iron pipe production, which comprises a slag removing rake and a mounting seat, a first driving mechanism is arranged on the mounting seat, the first driving mechanism comprises a rotating driving motor, an air cylinder and a connecting rod assembly, and the rotating driving motor is in linkage connection with the connecting rod assembly. The connecting rod assembly is in linkage connection with the slag removal rake, the slag removal rake rotates around the driving end of the rotating driving motor as the circle center, the connecting rod assembly forms a parallelogram structure, and the driving end of the air cylinder is in linkage fit with the connecting rod assembly so that the slag removal rake can rotate. The first driving mechanism drives the slag removing rake to do circumferential rotation and autorotation motion, so that slag in the ladle is scraped; the scum removal rake is high and stable in reciprocating motion speed, and scum can be quickly and efficiently removed.

Description

Technical Field

[0001] The utility model relates to the field of ductile iron pipe production, in particular to a slag skimming device on the side of a ladle for ductile iron pipe production. Background Art

[0002] Ductile iron pipes are pipes made of high-quality molten iron and centrifugally cast by a high-speed centrifugal ductile iron casting machine for the transportation of water and gas. Ductile iron pipes have the corrosion resistance of iron and the mechanical properties of steel. The high-speed centrifugal forming process of ductile iron pipes requires pure molten iron. The molten iron used for ductile iron pipes needs to be spheroidized, and slag is separated from the molten iron during the original molten iron and spheroidizing processes. The slag enters the mold with the molten iron and causes casting defects; at the same time, the slag adheres to the inner wall of the ladle, which easily changes the inner cavity volume of the ladle, and further causes a significant change in the weight of the molten iron entering the cavity per unit time, affecting the wall thickness uniformity of the cast pipe.

[0003] The existing cantilever scraper slag skimming machine for a ladle with the patent application number CN201320289808.7 includes a hinge seat and a swing oil cylinder. A swing arm is hingedly installed on the hinge seat. A rocker and two mounting seats are respectively arranged on the swing arm. A scraper is hingedly installed at the other end of the swing arm. A turnover oil cylinder and a lifting oil cylinder are respectively installed on the two mounting seats of the swing arm. A connecting rod is hingedly installed on the rocker of the swing arm. One end of the connecting rod is hingedly connected to the upper end of the scraper, and the other end of the connecting rod is connected to the end of the piston rod of the turnover oil cylinder; the lifting oil cylinder is hingedly installed on the mounting seat on the swing arm with the end of the piston rod, and the cylinder body of the lifting oil cylinder is hingedly installed on the hinge seat.

[0004] As described in the above patent document, the existing slag skimming device usually uses multiple oil cylinders to drive the scraper to swing and dig to achieve slag skimming. The hydraulic system and control system are relatively complex, the manufacturing cost is relatively high, the response speed is slow, which affects the operation efficiency and flexibility of slag skimming, and it occupies a large space and is limited in layout. Summary of the Utility Model

[0005] The utility model provides a slag skimming device on the side of a ladle for ductile iron pipe production to solve the technical problems of relatively complex hydraulic system and control system, relatively high manufacturing cost, slow response speed, low flexibility, and large occupied space in the prior art.

[0006] To solve the above problems, the side slag skimming device for the hot metal ladle used in the production of ductile iron pipes provided by the present utility model adopts the following technical solutions: It includes a slag cleaning rake, a mounting seat, and a first driving mechanism is arranged on the mounting seat. The first driving mechanism includes a rotation driving motor, a cylinder, and a connecting rod assembly. The rotation driving motor is linked with the connecting rod assembly to make the connecting rod assembly rotate around the driving end of the rotation driving motor, and the connecting rod assembly is linked with the slag cleaning rake to make the slag cleaning rake rotate around the driving end of the rotation driving motor. The connecting rod assembly forms a parallelogram structure, and the driving end of the cylinder is linked and cooperated with the connecting rod assembly to make the slag cleaning rake rotate self - sufficiently.

[0007] Further, the connecting rod assembly includes long connecting rods and short connecting rods. There are two groups of long connecting rods and short connecting rods respectively. The two ends of the short connecting rods are respectively hinged to the two groups of long connecting rods, and the end of the long connecting rod is hinged to the slag cleaning rake. One of the long connecting rods is linked with the cylinder and the rotation driving motor, and the other long connecting rod is rotatably installed on the mounting seat.

[0008] Further, the two groups of long connecting rods are respectively a first long connecting rod and a second long connecting rod. A sliding seat is arranged on the mounting seat. The first long connecting rod is provided with a connecting pin, and the connecting pin penetrates through the sliding seat and the telescopic driving end of the cylinder and is linked with the driving end of the rotation driving motor.

[0009] Further, the end of the first long connecting rod away from the mounting seat is hinged to the slag cleaning rake, and a connecting piece is fixed on the slag cleaning rake. The end of the second long connecting rod away from the mounting seat is hinged to the connecting piece.

[0010] Further, a fixing piece is arranged on the mounting seat, and the end of the second long connecting rod is hinged to the fixing piece.

[0011] Further, a second driving mechanism is arranged at the bottom of the mounting seat. The second driving mechanism includes a lifting seat, a bearing seat, and a sliding driving mechanism to drive the mounting seat to lift, rotate, and slide.

[0012] Further, the slag cleaning rake includes an operating handle and a slag cleaning part. The slag cleaning part is located at the end of the operating handle away from the mounting seat. There are several slag cleaning parts, and the several slag cleaning parts are evenly distributed along the surface of the operating handle. The total width of the distribution of the slag cleaning parts on the surface of the operating handle is adapted to the width of the hot metal ladle.

[0013] Further, the material of the slag cleaning part is Cr25 high - chromium cast iron.

[0014] Further, it also includes a coating tank, which corresponds to the slag cleaning part.

[0015] The beneficial effects of the side slag skimming device for the hot metal ladle used in the production of ductile iron pipes provided by the present utility model are:

[0016] 1. The first driving mechanism drives the slag cleaning rake to rotate circumferentially and rotate self - rotatably, realizing the scraping of the slag in the ladle.

[0017] 2. The reciprocating movement speed of the slag cleaning rake is fast and stable, which can quickly and efficiently remove the floating slag, reduce the labor intensity of workers. And this device has a simple structure, low manufacturing cost, fast response speed, high flexibility and small occupied space. Description of the Drawings

[0018] By referring to the accompanying drawings and reading the following detailed description, the above - mentioned and other purposes, features and advantages of the exemplary embodiments of the present utility model will become easily understandable. In the drawings, several embodiments of the present utility model are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0019] Figure 1 is a schematic structural diagram of a side slag skimming device for a ladle used in the production of ductile iron pipes of the present utility model;

[0020] Figure 2 is Figure 1 a partially enlarged structural diagram at A in

[0021] Figure 3 is a partial structural diagram of a side slag skimming device for a ladle used in the production of ductile iron pipes of the present utility model.

[0022] Description of the Reference Numerals in the Drawings:

[0023] 1. Slag cleaning rake; 11. Operating handle; 12. Slag cleaning part;

[0024] 2. Mounting seat; 21. Sliding seat; 22. Second driving mechanism; 221. Lifting seat; 222. Bearing seat; 23. Fixed part;

[0025] 3. First driving mechanism; 31. Cylinder; 311. Connecting pin; 32. Link assembly; 321. Long link; 3211. First long link; 3212. Second long link; 322. Short link; 323. Connecting part; 33. Rotating driving motor;

[0026] 4. Coating tank;

[0027] 5. Ladle. Detailed Embodiment

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are a part of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

[0029] The quantity of any element in the drawings is for illustration rather than limitation, and any naming is only for distinction without any limiting meaning.

[0030] Next, the principles and spirit of the present invention will be elaborated in detail with reference to several representative embodiments of the present invention.

[0031] A slag skimming device on the side of a molten iron ladle for producing ductile iron pipes provided by the present invention, as Figures 1 to 3 shown, includes a slag cleaning rake 1, a mounting seat 2, and a first driving mechanism 3 is arranged on the mounting seat 2. The first driving mechanism 3 includes a rotation driving motor 33, a cylinder 31, and a connecting rod assembly 32. The rotation driving motor 33 is linked with the connecting rod assembly 32 to make the connecting rod assembly 32 rotate around the driving end of the rotation driving motor 33 as the center. The connecting rod assembly 32 is linked with the slag cleaning rake 1 to make the slag cleaning rake 1 rotate around the driving end of the rotation driving motor 33 as the center. The connecting rod assembly 32 forms a parallelogram structure, and the driving end of the cylinder 31 is linked and cooperated with the connecting rod assembly 32 to make the slag cleaning rake 1 rotate self - rotatably.

[0032] In this embodiment, the connecting rod assembly 32 includes a long connecting rod 321 and a short connecting rod 322. There are two groups of long connecting rods 321 and short connecting rods 322 respectively. Both ends of the short connecting rod 322 are hinged to the two groups of long connecting rods 321 respectively. The end of the long connecting rod 321 is hinged to the slag cleaning rake 1. One of the long connecting rods 321 is linked with the cylinder 31 and the rotation driving motor 33, and the other long connecting rod 321 is rotatably installed on the mounting seat 2.

[0033] In this embodiment, the two groups of long connecting rods 321 are respectively a first long connecting rod 3211 and a second long connecting rod 3212. A sliding seat 21 is arranged on the mounting seat 2. The first long connecting rod 3211 is provided with a connecting pin 311. The connecting pin 311 penetrates through the sliding seat 21, the telescopic driving end of the cylinder 31 and is linked with the driving end of the rotation driving motor 33. In this embodiment, a fixing member 23 is arranged on the mounting seat 2 to increase the height of the mounting seat 2. The end of the second long connecting rod 3212 is hinged to the fixing member 23.

[0034] In this embodiment, the end of the first long connecting rod 3211 away from the mounting seat 2 is hingedly connected to the slag cleaning rake 1, and a connecting piece 323 is fixed on the slag cleaning rake 1. The end of the second long connecting rod 3212 away from the mounting seat 2 is hingedly connected to the connecting piece 323.

[0035] In this embodiment, the first long connecting rod 3211 is hingedly connected to the driving end of the cylinder 31 through the connecting pin 311, and the first long connecting rod 3211 is linked to the driving end of the rotating driving motor 33 to realize power transmission, so that the first long connecting rod 3211 can rotate around the driving end of the rotating driving motor 33 as the center of the circle, and can slide under the driving action of the cylinder 31, and the second long connecting rod 3212 is rotatably mounted on the mounting seat 2 through the fixing member 23, which plays a role in supporting and transmitting movement. The setting of the two groups of short connecting rods 322 enables the connecting rod assembly 32 to form a stable parallelogram structure, and the end of the second long connecting rod 3212 facing the mounting seat 2 is the fixed point of the parallelogram structure, and the end of the first long connecting rod 3211 facing the mounting seat 2 is the active point of the parallelogram structure.

[0036] In this embodiment, the device mainly relies on mechanical transmission and power conversion to effectively remove the slag in the ladle. The rotation drive motor 33 is used as the main power source. After starting, it generates rotational power. The power of the rotation drive motor 33 is transmitted to the connecting rod assembly 32 through the connecting pin 311, driving the entire connecting rod assembly 32 and the slag removal rake 1 to perform circular motion, and the slag on the surface of the molten iron is removed by reciprocating scraping. The connecting rod assembly 32 is composed of a long connecting rod 321 and a short connecting rod 322 to form a parallelogram structure, which ensures the stability and posture control of the slag removal rake 1 during the rotation process. The cylinder 31 provides a linear driving force, and the deformation of the parallelogram structure is achieved through its telescopic motion. When the cylinder 31 is extended or shortened, it will change the angle between the first long connecting rod 3211 and the second long connecting rod 3212, so that the slag removal rake 1 rotates on the basis of the circular motion to remove the slag from the ladle 5.

[0037] In this embodiment, a second driving mechanism 22 is provided at the bottom of the mounting seat 2. The second driving mechanism 22 includes a lifting seat 221, a bearing seat 222, and a sliding driving mechanism to drive the mounting seat 2 to lift, rotate, and slide. In this embodiment, the lifting seat 221 is telescopically lifted and retracted by a lifting motor, thereby realizing the height adjustment of the mounting seat. A rotating motor is linked to the bottom of the lifting seat, and the rotating motor cooperates with the bearing seat 222 to allow the lifting seat to rotate around the bearing seat 222 while lifting and lowering, thereby realizing the rotation adjustment of the lifting seat, thereby realizing the rotation of the mounting seat. The sliding driving mechanism includes a telescopic driving motor located on one side of the bearing seat, so as to realize the movement of the lifting seat in the horizontal direction, thereby realizing the movement of the mounting seat in the horizontal direction, thereby realizing the slag cleaning rake to clean the slag at different positions and depths, which is more practical.

[0038] In other embodiments, the lifting seat 221 can receive power through mechanical transmissions such as ball screw structures or hydraulic and pneumatic systems to achieve the vertical movement of the mounting seat 2. To ensure stability and precision during the lifting process, the lifting seat 221 can be equipped with a guiding mechanism, such as guide rails, guide columns, or ball screws, to restrict the moving direction of the lifting seat 221 and prevent it from shifting or swaying.

[0039] In other embodiments, a chain or belt can be used as a transmission element to transfer the rotational motion of the motor to a sprocket or pulley on the lifting seat 221. The lifting seat 221 is rotated around the bearing seat 222 by the pulling force of the chain or belt, thereby achieving the rotation of the mounting seat 2.

[0040] In other embodiments, a motor, cylinder, hydraulic cylinder, etc. can be provided to generate a driving force by means of rotation, liquid pressure, or electricity to drive the lifting seat 221 to perform a linear motion. To ensure stability and precision during the linear motion of the lifting seat 221, the sliding driving mechanism can be equipped with a guiding mechanism, such as guide rails, guide columns, sliders, etc., to restrict the moving direction of the lifting seat 221 and reduce friction and wear during its movement.

[0041] In this embodiment, the slag cleaning rake 1 includes an operating handle 11 and a slag cleaning member 12. The slag cleaning member 12 is located at one end of the operating handle 11 away from the mounting seat 2. There are several slag cleaning members 12, and the several slag cleaning members 12 are evenly distributed along the surface of the operating handle 11. The total width of the distribution of the slag cleaning members 12 on the surface of the operating handle 11 is adapted to the width of the ladle 5, facilitating the peeling of the floating slag from the surface of the molten iron and pushing it to the edge of the ladle 5 or into the collection device.

[0042] In this embodiment, the material of the slag cleaning member 12 is Cr25 high-chromium cast iron to ensure the slag cleaning efficiency and service life of the device. The slag cleaning member 12 comes into contact with the molten iron. In other embodiments, the slag cleaning member 12 can also be made of other high-temperature resistant metal materials such as nickel-based alloys and tungsten alloys. When selecting the material of the slag cleaning member 12, multiple factors need to be considered comprehensively, including the temperature and composition of the molten iron, slag cleaning efficiency requirements, equipment cost, and maintenance difficulty, etc.

[0043] In this embodiment, a coating tank 4 is further included. The coating tank 4 corresponds to the slag cleaning member 12. After the slag cleaning rake 1 finishes slag cleaning, it rotates around the bearing seat 222 to the upper part of the coating tank 4, facilitating the cleaning and cooling of the slag cleaning rake 1.

[0044] A slag scraping device on the side of a ladle for ductile iron pipe production provided by the present utility model. A first driving mechanism 3 drives a slag cleaning rake 1 to rotate circumferentially and rotate self - axially, so as to realize the scraping of slag in a ladle 5; A second driving mechanism 22 can drive a mounting seat 2 to lift, rotate and slide, so as to realize the cleaning of slag at different positions and depths by the slag cleaning rake 1, and the practicability is stronger. In this device, the reciprocating movement speed of the slag cleaning rake 1 is fast and stable, which can quickly and efficiently remove floating slag, reduce the labor intensity of workers, and the device has a simple structure, low manufacturing cost, fast response speed, high flexibility and small occupied space.

[0045] According to the above description of this specification, those skilled in the art can also understand the following terms used, such as terms indicating orientation or positional relationship, such as "upper", "lower", "front", "rear", "left", "right", "width", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings of this specification. It is only for the purpose of facilitating the description of the solution of the present utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or component involved must have the specific orientation, be constructed and operate in the specific orientation. Therefore, the above terms of orientation or positional relationship cannot be understood or interpreted as a limitation to the solution of the present utility model.

[0046] In addition, in the description of this specification, the meaning of "a plurality of" is at least two, such as two, three or more, etc., unless otherwise specifically and clearly defined.

Claims

1. A slag removal device for a ladle side for producing ductile iron pipes, characterized in that: It includes a slag cleaning rake, a mounting seat, and a first driving mechanism is arranged on the mounting seat. The first driving mechanism includes a rotating drive motor, a cylinder, and a connecting rod assembly. The rotating drive motor is linked to the connecting rod assembly so that the connecting rod assembly rotates around the driving end of the rotating drive motor as the center of the circle. The connecting rod assembly is linked to the slag cleaning rake so that the slag cleaning rake rotates around the driving end of the rotating drive motor as the center of the circle. The connecting rod assembly forms a parallelogram structure, and the driving end of the cylinder is linked to the connecting rod assembly to make the slag cleaning rake rotate.

2. The device for removing slag from the side of a ladle for producing ductile iron pipes according to claim 1, characterized in that: The connecting rod assembly includes a long connecting rod and a short connecting rod. The long connecting rod and the short connecting rod each include two groups. The two ends of the short connecting rod are respectively hingedly connected to the two groups of long connecting rods. The end of the long connecting rod is hingedly connected to the slag cleaning rake. One of the long connecting rods is linked to the cylinder and the rotating drive motor, and the other long connecting rod is rotatably installed on the mounting seat.

3. The device for removing slag from the side of a ladle for producing ductile iron pipes according to claim 2, characterized in that: The two groups of long connecting rods are respectively the first long connecting rod and the second long connecting rod. A sliding seat is arranged on the mounting seat. The first long connecting rod is provided with a connecting pin, which passes through the sliding seat and the telescopic driving end of the cylinder and is linked to the driving end of the rotating driving motor.

4. The device for removing slag from the side of a ladle for producing ductile iron pipes according to claim 3, characterized in that: One end of the first long connecting rod away from the mounting seat is hingedly connected to the slag cleaning rake, a connecting piece is fixed on the slag cleaning rake, and one end of the second long connecting rod away from the mounting seat is hingedly connected to the connecting piece.

5. The device for removing slag from the side of a ladle for producing ductile iron pipes according to any one of claims 1 to 4, characterized in that: A second driving mechanism is arranged at the bottom of the mounting seat, and the second driving mechanism comprises a lifting seat, a bearing seat, and a sliding driving mechanism to drive the mounting seat to lift, rotate, and slide.

6. The device for removing slag from the side of a ladle for producing ductile iron pipes according to any one of claims 1 to 4, characterized in that: The slag cleaning rake includes an operating handle and a slag cleaning piece. The slag cleaning piece is located at one end of the operating handle away from the mounting seat. The slag cleaning piece includes a plurality of slag cleaning pieces, which are evenly distributed along the surface of the operating handle. The total width of the slag cleaning pieces distributed on the surface of the operating handle is adapted to the width of the ladle.

7. The device for removing slag from the side of a ladle for producing ductile iron pipes according to claim 6, characterized in that: The material of the slag cleaning parts is Cr25 high chromium cast iron.

8. The device for removing slag from the side of a ladle for producing ductile iron pipes according to claim 7, characterized in that: It also includes a paint tank, which corresponds to the slag cleaning piece.

Images