CN216405532U - Accurate slag grabbing system for blast furnace water slag bottom filter - Google Patents

Abstract

The utility model provides a blast furnace water slag bottom filter tank accurate slag grabbing system which comprises a cart track (1), a cart mechanism (2), a trolley track (3), a trolley mechanism (4) and a slag digging device (5) which are sequentially arranged, wherein the slag digging device (5) comprises a mounting base (51), a first swing arm (52), a second swing arm (53) and a grab bucket mechanism (54) which are sequentially arranged, the slag digging device (5) can rotate around a rotating axis, the grab bucket mechanism (54) can move to the lower part of the cart track (1) or the upper part of the trolley mechanism (4), the grab bucket mechanism (54) comprises two grab buckets (545) which are bilaterally symmetrically arranged, and the lower parts of the two grab buckets (545) can be opened or closed. This accurate slag grabbing system of blast furnace water slag bottom filter is the system of the low type clearance bottom filter sediment grain of convenient to maintain, has solved the swing of bridge type grab bucket crane grab bucket and has spilt the problem of material to can realize accurate slag grabbing and avoid destroying bottom filter material structure.

Description

Accurate slag grabbing system for blast furnace water slag bottom filter

Technical Field

The utility model relates to the technical field of blast furnace ironmaking equipment, in particular to a precise slag grabbing system of a blast furnace water slag bottom filter.

Background

High-temperature liquid slag (1350-1500 ℃) can be generated during blast furnace smelting, and about 2.8 hundred million tons of high-temperature liquid slag is generated during domestic molten iron production every year.

The slag is treated by a precipitation filtration method (commonly called bottom filtration method) water slag process at home and abroad. The hydraulic slag flushing is carried out in front of the blast furnace, the slag is smashed by water quenching and then becomes loose slag-water mixture (often called water slag), and the water slag enters the bottom filter tank through a slag flushing ditch. Liquid water is filtered by a plurality of layers of filter materials in the bottom filter tank, solid wet slag particles are left at the top of the filter materials in the bottom filter tank, and then the slag particles are grabbed, loaded and transported outside by a bridge type grab bucket crane. The slag particles (with the particle size of 0.2mm-3mm) obtained after water quenching have wide application, can be used as cement materials, heat insulation fillers and the like, and make full use of the slag.

The existing slag grabbing equipment is a bridge type grab bucket crane and is also the most common slag grabbing equipment of a blast furnace ironmaking water slag system. The bridge type grab bucket crane is positioned above the bottom filter pool and runs on an elevated rail, the elevated rail is positioned on a high cement column or a metal bracket, the height of the rail surface of the elevated rail is generally more than 10 meters, and great difficulty is brought to the maintenance and overhaul of equipment.

The connection and the driving of the grab bucket of the bridge type grab crane and the travelling mechanism are completed through a steel wire rope, and the grab bucket and the travelling mechanism are flexibly connected. After the grab bucket finishes the slag grabbing operation in the filter tank, the grab bucket needs to move to the position above the slag conveying automobile to carry out slag unloading operation. After a trolley mechanism of the grab crane runs above a slag transporting automobile and stops, the grab bucket can swing slightly due to the inertia effect, the material scattering condition can be avoided when the grab bucket is unloaded, a site worker needs to clean falling slag particles, and the extra workload of the site worker is increased.

For a bridge type grab bucket crane, the steel wire rope drives the grab bucket to ascend and descend, the descending height of the grab bucket is difficult to accurately control, the grab bucket easily damages a filter material structure in a filter tank when grabbing slag, the filtering effect is seriously influenced, and the important influence is caused on a filtering system of a water slag process.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of poor slag grabbing precision and difficult maintenance of the bridge type grab bucket crane, the utility model provides a blast furnace slag bottom filter tank precise slag grabbing system which is a low-profile bottom filter tank slag particle cleaning system convenient for maintenance, solves the problem of swinging and scattering of a grab bucket of the bridge type grab bucket crane, and can realize precise slag grabbing to avoid damaging a filter material structure of the bottom filter tank.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides an accurate slag grabbing system of blast furnace sediment bottom filter, includes cart track, cart mechanism, dolly track, dolly mechanism that set gradually and digs the sediment device, digs the sediment device and contains the installation base, first swing arm, second swing arm and the grab bucket mechanism that set gradually, and the installation base passes through rotary device and is connected with dolly mechanism, digs the sediment device and can rotate around the axis of rotation, the axis of rotation is upright state, and grab bucket mechanism can remove to the orbital below of cart or the top of dolly mechanism, and grab bucket mechanism contains two grabs of bilateral symmetry setting, and the lower part of two grabs can open or be closed.

The total height of the cart track, the cart mechanism, the trolley track, the trolley mechanism and the mounting base is 1.5-2.5 m.

The blast furnace water slag bottom filter tank accurate slag grabbing system further comprises water retaining walls, the water retaining walls are located on two sides outside the bottom filter tank, the two cart rails are correspondingly located on the two water retaining walls, the cart rails and the water retaining walls extend along the length direction of the bottom filter tank, and the height of the water retaining walls is 1-2 m.

The rotating device is located on the trolley mechanism and is of an upright cylindrical structure or a cylindrical structure, a rotating driving device is arranged in the trolley mechanism and can drive the rotating device to rotate, and the axis of the rotating device is overlapped with the rotation axis.

When the grab bucket mechanism is positioned at the lowest point, the grab bucket mechanism can dig and clean slag particles at the bottom of the bottom filter tank; when the grab bucket mechanism is located at the highest point, the grab bucket mechanism can carry out slag unloading operation on the slag conveying automobile.

The installation base, the first swing arm, the second swing arm and the grab bucket mechanism are sequentially hinged, the first swing arm is of a bending structure, the joint of the first swing arm and the installation base is located on the periphery of the installation base, a first hydraulic cylinder is connected between the installation base and the first swing arm, the first hydraulic cylinder can drive the first swing arm to swing, a second hydraulic cylinder is connected between the first swing arm and the second swing arm, and the second hydraulic cylinder can drive the second swing arm to swing.

The grab bucket mechanism further comprises a hanging support, an opening and closing hydraulic cylinder and a grab bucket support which are sequentially connected from top to bottom, the hanging support is hinged to the second swing arm, the upper portions of the two grab buckets are hinged to the grab bucket support, the upper portions of the two grab buckets are hinged to a cylinder barrel of the opening and closing hydraulic cylinder through grab bucket connecting rods, and the opening and closing hydraulic cylinder stretches and retracts to enable the lower portions of the two grab buckets to be opened or closed.

Two grab buckets are each other for the mirror image, and the grab bucket contains the end plate that two parallel intervals set up, is equipped with the peripheral plate between two end plates, and the outer overlapping in lower part of end plate is connected with rectangular push pedal, and when the lower part of two grab buckets was closed, the length direction of rectangular push pedal was on a parallel with the horizontal plane, and the lower side of rectangular push pedal flushes with the lower extreme of end plate.

The accurate slag grabbing system of the blast furnace water slag bottom filter tank further comprises a grab bucket mechanism control system, and the grab bucket mechanism control system comprises a grab bucket mechanism horizontal position control system, a grab bucket mechanism height position control system and a grab bucket mechanism slag digging and discharging action control system.

The grab bucket mechanism horizontal position control system comprises a cart mechanism control module and a trolley mechanism control module, wherein the cart mechanism control module can control the position of a cart mechanism on a cart track, and the trolley mechanism control module can control the position of a trolley mechanism on a trolley track; the grab bucket mechanism height position control system comprises a first hydraulic cylinder control module and a second hydraulic cylinder control module, wherein the first hydraulic cylinder control module can control the telescopic length of a first hydraulic cylinder, and the second hydraulic cylinder control module can control the telescopic length of a second hydraulic cylinder; the grab bucket mechanism slag digging and discharging action control system comprises an opening and closing hydraulic cylinder control module and a material driving action control module, wherein the opening and closing hydraulic cylinder control module can control the opening and closing hydraulic cylinder to stretch, and the material driving action control module can enable the grab bucket mechanism to push slag particles to form accumulation.

The utility model has the beneficial effects that:

1. the accurate slag grabbing system of the blast furnace water slag bottom filter belongs to a low-height accurate slag digging system, the main body part of the accurate slag grabbing system of the blast furnace water slag bottom filter is positioned on a water retaining wall of the bottom filter (the height of the water retaining wall is generally less than 2 meters), the whole height is low, and the accurate slag grabbing system is easy to maintain.

2. The common grab bucket swinging problem of the common grab bucket crane is effectively solved, and the material scattering condition is avoided.

3. Through the extension length of the control hydraulic cylinder, the accurate control of the height of the grab bucket mechanism is realized, and the problem that the filter material structure of the bottom filter pool is damaged due to the excessively low height of the grab bucket mechanism when the slag is dug is avoided.

4. The intelligent control of the slag digging system is easily realized by adopting hydraulic drive.

5. The hydraulic slag digging system is driven by hydraulic pressure, has stable action and quick equipment response, can be started at high speed and reversed frequently, and can greatly improve the working efficiency of digging and discharging slag.

6. When the thickness of the slag particles at the bottom of the bottom filter tank is not large, the slag removal efficiency is very low at the moment if a bridge type grab bucket crane is adopted; and the grab bucket utilizes swing arm and pneumatic cylinder to carry out rigid connection, can catch the action of material when slag particle thickness is not big, piles up the back to the slag particle and grab sediment clearance work again, improves work efficiency by a wide margin.

7. The utility model can be applied to a newly-built granulating slag system and the technical improvement of the original granulating slag system, and can thoroughly solve a plurality of problems of the existing wire rope type bridge grab crane.

8. The utility model can more efficiently finish the slag particle cleaning operation through redesigning the actuating mechanism (bucket part) of the excavator and the material driving function of the grab bucket.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

FIG. 1 is a schematic diagram of the precise slag grabbing system of the blast furnace water slag bottom filter chamber during slag digging operation.

FIG. 2 is a schematic diagram of the precise slag grabbing system of the blast furnace water slag bottom filter chamber during slag unloading operation.

FIG. 3 is a schematic view of a slag digging apparatus.

FIG. 4 is a schematic view of the connection of the slag digging device and the trolley mechanism.

Fig. 5 is a schematic view of the lower parts of two grapple when opened.

Fig. 6 is a schematic view of the lower parts of two grapples when closed.

FIG. 7 is a schematic diagram of the control part of the precise slag grabbing system of the blast furnace water slag bottom filter.

Fig. 8 is a schematic view of the lower portions of two grapples provided with a strip pusher.

1. A cart track; 2. a cart mechanism; 3. a trolley track; 4. a trolley mechanism; 5. a slag digging device; 6. a discharge hopper; 7. a slag transport vehicle; 8. a bottom filter chamber; 9. a grapple mechanism control system;

41. a rotating device; 42. a rotation driving device;

51. installing a base; 52. a first swing arm; 53. a second swing arm; 54. a grab bucket mechanism; 55. a first hydraulic cylinder; 56. a second hydraulic cylinder;

81. a water retaining wall;

91. a grab bucket mechanism horizontal position control system; 92. a grab mechanism height position control system; 93. a slag digging and discharging action control system of the grab bucket mechanism;

541. hanging a support; 542. opening and closing the hydraulic cylinder; 543. a grab bucket bracket; 544. a grab bucket connecting rod; 545. a grab bucket; 546. an end plate; 547. an outer peripheral plate; 548. a strip push plate;

911. a cart mechanism control module; 912. a trolley mechanism control module; 921. a first hydraulic cylinder control module; 922. a second hydraulic cylinder control module; 931. the hydraulic cylinder control module is opened and closed; 932. and a material driving action control module.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The utility model provides an accurate sediment system of grabbing of blast furnace sediment bottom filtering pond, includes from the big car track 1, big car mechanism 2, dolly track 3, dolly mechanism 4 that upwards connects gradually and digs sediment device 5 down, digs sediment device 5 and contains the installation base 51, first swing arm 52, second swing arm 53 and the grab bucket mechanism 54 that connect gradually, and installation base 51 passes through rotary device 41 and is connected with dolly mechanism 4, digs sediment device 5 and can rotate around axis of rotation L, axis of rotation L is upright state, and grab bucket mechanism 54 can move to the below of big car track 1 or the top of dolly mechanism 4, and grab bucket mechanism 54 contains two grab buckets 545 that bilateral symmetry set up, and the lower part of two grab buckets 545 can open or be closed, as shown in fig. 1-4.

Dig sediment device 5 can adopt the excavator among the existing engineering equipment, remove behind track or the wheel and combine together with dolly mechanism 4 to reform transform its scraper bowl into grab bucket mechanism 54, thereby formed new accurate sediment system of digging, not only can ensure the reliability of new equipment action, can realize moreover that accurate sediment of digging accomplishes the sediment grain clearance operation, can also reduce the whole height low of the accurate sediment system of grabbing of blast furnace sediment bottom filtering pond, easy to maintain.

In this embodiment, the accurate slag grabbing system for the blast furnace water slag bottom filter further comprises water retaining walls 81, the water retaining walls 81 are located on two sides outside the bottom filter 8, the two cart rails 1 are fixed on the two water retaining walls 81 in a one-to-one correspondence manner, the cart rails 1 and the water retaining walls 81 both extend along the length direction of the bottom filter 8, and the height of the water retaining walls 81 is 1-2 meters. The total height of the cart track 1, cart mechanism 2, cart track 3, cart mechanism 4, and mounting base 51 is 1.5 meters to 2.5 meters (e.g., 2.2 meters). The accurate slag grabbing system of the blast furnace water slag bottom filter is far lower than the rail surface height (generally more than 10 meters) of the existing bridge type grab bucket crane.

In this embodiment, the cart mechanism 2 can move along the cart track 1, the cart track 3 is fixed on the cart mechanism 2, and the slag digging device 5 and the cart mechanism 4 can move synchronously along the cart track 3. In a rectangular spatial coordinate system with X, Y, Z axes as coordinate axes, the length direction of the bottom filter 8 is parallel to the X-axis direction, the width direction of the bottom filter 8 is parallel to the Y-axis direction, the rotation axis L is parallel to the Z-axis direction, i.e. the cart mechanism 2 can move along the X-axis direction, and the slag digging device 5 and the cart mechanism 4 can move synchronously along the Y-axis direction. The cart track 1, the cart mechanism 2, the trolley track 3 and the trolley mechanism 4 can all adopt products in the prior art.

According to the requirements of slag digging and discharging operation, the cart mechanism 2 can drive the slag digging device 5 to reciprocate along the length direction of the bottom filter tank 8 through the cart track 1, and the trolley mechanism 4 can drive the slag digging device 5 to reciprocate along the width direction of the bottom filter tank 8 through the trolley track 3 on the cart mechanism 2.

In this embodiment, the rotating device 41 is mounted on the trolley mechanism 4, the rotating device 41 may be in an upright cylindrical structure or a cylindrical structure, a rotation driving device 42 is disposed in the trolley mechanism 4, the rotation driving device 42 can drive the rotating device 41 to rotate, and an axis of the rotating device 41 coincides with the rotation axis L, so as to drive the slag digging device 5 to rotate 360 degrees around the rotation axis L, so as to dig slag at different positions in the bottom filter 8 or unload slag from the slag transporting vehicle 7, as shown in fig. 1 to 4.

In the embodiment, the slag digging device 5 can control the grab bucket mechanism 54 to swing up and down and rotate, and when the grab bucket mechanism 54 is located at the lowest point, the grab bucket mechanism 54 can dig and clean slag particles at the bottom of the bottom filter 8; when the grab bucket mechanism 54 is located at the highest point, the grab bucket mechanism 54 can carry out slag discharging operation on the slag transporting vehicle 7. The ground outside the bottom filter 8 can be provided with a discharge hopper 6, the discharge hopper 6 comprises a discharge hopper and a hopper support which are arranged up and down, during slag discharging operation, the slag transport vehicle 7 can be stopped below the discharge hopper, the grab bucket mechanism 54 discharges the dug slag particles into the discharge hopper, and the slag particles pass through the discharge hopper and then fall into the slag transport vehicle 7.

In this embodiment, the mounting base 51, the first swing arm 52, the second swing arm 53, and the grapple mechanism 54 are sequentially hinged, the first swing arm 52 is a curved structure, the joint of the first swing arm 52 and the mounting base 51 is located on the peripheral side (such as the front side, the rear side, the left side, or the right side) of the mounting base 51, a first hydraulic cylinder 55 is connected between the mounting base 51 and the first swing arm 52, the first hydraulic cylinder 55 can drive the first swing arm 52 to swing relative to the mounting base 51, a second hydraulic cylinder 56 is connected between the first swing arm 52 and the second swing arm 53, and the second hydraulic cylinder 56 can drive the second swing arm 53 to swing relative to the first swing arm 52. The first swing arm 52 and the second swing arm 53 are capable of controlling the height of the grapple mechanism 54 by the first hydraulic cylinder 55 and the second hydraulic cylinder 56.

In this embodiment, the grab mechanism 54 further includes a hanging support 541, an opening/closing hydraulic cylinder 542 and a grab bracket 543 which are sequentially connected from top to bottom, the hanging support 541 is hinged to the second swing arm 53, the upper portions of the two grabs 545 are both hinged to the grab bracket 543, the upper portions of the two grabs 545 are both hinged to the cylinder of the opening/closing hydraulic cylinder 542 through a grab link 544, and the opening/closing hydraulic cylinder 542 extends and retracts to enable the lower portions of the two grabs 545 to be opened or closed. When the opening and closing hydraulic cylinder 542 extends, the lower portions of the two grab buckets 545 are opened; when the opening/closing hydraulic cylinder 542 is shortened, the lower portions of the two grapples 545 are closed. Slag catching and discharging operations of the grab 545 can be achieved by controlling the operation of the opening and closing hydraulic cylinder 542, as shown in fig. 5 and 6.

In this embodiment, the two grab buckets 545 are mirror images of each other, the grab bucket 545 comprises two end plates 546 arranged in parallel at intervals, an outer peripheral plate 547 is arranged between the two end plates 546, the end plates 546 are in a fan-shaped structure, the outer peripheral plate 547 is in an arc-shaped structure, and no digging tooth is arranged below the grab bucket 545. When the lower parts of the two grab buckets 545 are opened, the lower ends of the two grab buckets 545 are separated from each other; when the lower portions of the two grapples 545 are closed, the lower ends of the two grapples 545 are coupled to each other.

In this embodiment, the accurate slag grabbing system for the blast furnace granulated slag bottom filter further includes a grab mechanism control system 9, and the grab mechanism control system 9 includes a grab mechanism horizontal position control system 91, a grab mechanism height position control system 92, and a grab mechanism slag digging and discharging action control system 93, as shown in fig. 7. The precise slag digging and discharging operation is realized through a horizontal position control system 91 of the grab bucket mechanism, a height position control system 92 of the grab bucket mechanism and a slag digging and discharging action control system 93 of the grab bucket mechanism.

The grapple bucket mechanism horizontal position control system 91 includes a cart mechanism control module 911 and a cart mechanism control module 912, wherein the cart mechanism control module 911 is capable of controlling the position of the cart mechanism 2 on the cart rail 1 (i.e., the position in the X-axis direction), and the cart mechanism control module 912 is capable of controlling the position of the cart mechanism 4 on the cart rail 3 (i.e., the position in the Y-axis direction). And then the horizontal position of the grab bucket mechanism 54 is accurately controlled, and the slag digging operation at the position of the bottom filter 8 and the slag unloading operation at the position of the slag transport vehicle 7 are efficiently and accurately realized.

The grapple bucket height position control system 92 includes a first hydraulic cylinder control module 921 and a second hydraulic cylinder control module 922, wherein the first hydraulic cylinder control module 921 is capable of controlling the telescopic length of the first hydraulic cylinder 55, and the second hydraulic cylinder control module 922 is capable of controlling the telescopic length of the second hydraulic cylinder 56. The limit of the extension length of the second hydraulic cylinder 56 is judged through the extension length of the first hydraulic cylinder 55 (or the limit of the extension length of the first hydraulic cylinder 55 is judged through the extension length of the second hydraulic cylinder 56), the control of the height position (namely the position in the Z-axis direction) of the grab bucket mechanism 54 is realized, and the situation that the filter material structure of the bottom filter tank is damaged due to the fact that the height of the grab bucket mechanism 54 is too low when the slag is excavated is avoided. The grab bucket mechanism slag digging and discharging action control system 93 comprises an opening and closing hydraulic cylinder control module 931, and the opening and closing hydraulic cylinder control module 931 can control the opening and closing hydraulic cylinder 542 to stretch and retract, so that the slag digging and discharging operation is realized.

Grab bucket mechanism digs sediment and unloads sediment action control system 93 still contains and drives material action control module 932, and when 8 bottom slag particles thickness in bottom filter (for example be less than 500mm), the direct sediment of grabbing can reduce equipment work efficiency by a wide margin, can drive material action control module 932 through driving this moment, makes grab bucket mechanism 54 pile up the back through driving the material action and grab sediment clearance work again, improves work efficiency by a wide margin. The material driving control module 932 can move the grapple mechanism 54 at the appropriate height and in the X-axis direction or the Y-axis direction to push the slag particles to form an aggregate pile.

To improve the efficiency of material driving, the end plate 546 may have a rectangular configuration, with the lower side of the end plate 546 being parallel to the horizontal when the lower portions of the two grapple 545 are closed. Alternatively, a strip push plate 548 may be attached to the lower portion of the end plate 546 in a stacked manner, wherein when the lower portions of the two grapples 545 are closed, the length of the strip push plate 548 is parallel to the horizontal plane, the lower side of the strip push plate 548 is parallel to the horizontal plane, and the lower side of the strip push plate 548 is flush with the lower end of the end plate 546, as shown in fig. 8.

The above description is only exemplary of the utility model and should not be taken as limiting the scope of the utility model, so that the utility model is intended to cover all modifications and equivalents of the embodiments, which may be included within the spirit and scope of the utility model. In addition, the technical features and the technical schemes, and the technical schemes can be freely combined and used.

Claims (10)

1. The accurate slag grabbing system of the blast furnace granulated slag bottom filter tank is characterized by comprising a cart track (1), a cart mechanism (2), a cart track (3), a cart mechanism (4) and a slag digging device (5) which are sequentially arranged, wherein the slag digging device (5) comprises an installation base (51), a first swing arm (52), a second swing arm (53) and a grab bucket mechanism (54) which are sequentially arranged, the installation base (51) is connected with the cart mechanism (4) through a rotating device (41), the slag digging device (5) can rotate around a rotating axis, the rotation axis is in an upright state, the grab bucket mechanism (54) can move to the lower part of the cart track (1) or the upper part of the trolley mechanism (4), the grab bucket mechanism (54) comprises two grab buckets (545) which are arranged in bilateral symmetry, and the lower parts of the two grab buckets (545) can be opened or closed.

2. The accurate slag grabbing system of the blast furnace water slag bottom filter according to claim 1, wherein the total height of the cart track (1), the cart mechanism (2), the trolley track (3), the trolley mechanism (4) and the mounting base (51) is 1.5-2.5 m.

3. The blast furnace slag bottom filter tank accurate slag grabbing system according to claim 1, characterized in that the blast furnace slag bottom filter tank accurate slag grabbing system further comprises water retaining walls (81), the water retaining walls (81) are located on two sides outside the bottom filter tank (8), the two cart rails (1) are correspondingly located on the two water retaining walls (81), the cart rails (1) and the water retaining walls (81) both extend along the length direction of the bottom filter tank (8), and the height of the water retaining walls (81) is 1-2 m.

4. The accurate slag grabbing system of the blast furnace water slag bottom filter according to claim 1, wherein the rotating device (41) is located on the trolley mechanism (4), the rotating device (41) is of an upright cylindrical structure or a cylindrical structure, a rotating driving device (42) is arranged in the trolley mechanism (4), the rotating driving device (42) can drive the rotating device (41) to rotate, and the axis of the rotating device (41) is coincident with the rotation axis.

5. The blast furnace water slag bottom filter accurate slag grabbing system according to claim 1, wherein when the grab bucket mechanism (54) is located at the lowest point, the grab bucket mechanism (54) can dig and clean the slag particles at the bottom of the bottom filter (8); when the grab bucket mechanism (54) is positioned at the highest point, the grab bucket mechanism (54) can carry out slag unloading operation on the slag conveying automobile (7).

6. The accurate slag grabbing system of the blast furnace water slag bottom filter according to claim 1, wherein the installation base (51), the first swing arm (52), the second swing arm (53) and the grab bucket mechanism (54) are sequentially hinged, the first swing arm (52) is of a bending structure, the joint of the first swing arm (52) and the installation base (51) is located on the periphery of the installation base (51), a first hydraulic cylinder (55) is connected between the installation base (51) and the first swing arm (52), the first hydraulic cylinder (55) can drive the first swing arm (52) to swing, a second hydraulic cylinder (56) is connected between the first swing arm (52) and the second swing arm (53), and the second hydraulic cylinder (56) can drive the second swing arm (53) to swing.

7. The accurate slag grabbing system of the blast furnace water slag bottom filtering pond of claim 6, characterized in that, the grab bucket mechanism (54) still contains hanging support (541), switching hydraulic cylinder (542) and grab bucket support (543) that from top to bottom connect gradually, hanging support (541) and second swing arm (53) are articulated, the upper portion of two grab buckets (545) all articulates with grab bucket support (543), the upper portion of two grab buckets (545) all articulates with the cylinder of switching hydraulic cylinder (542) through grab bucket connecting rod (544), switching hydraulic cylinder (542) flexible can make the lower part of two grab buckets (545) open or closed.

8. The blast furnace slag bottom filtering pond accurate slag grabbing system of claim 1, characterized in that, two grab buckets (545) are each other the mirror image, grab bucket (545) contain two parallel end plates (546) of setting up at an interval, be equipped with between two end plates (546) periphery board (547), the outer range upon range of connection has rectangular push pedal (548) in the lower part of end plate (546), when the lower part of two grab buckets (545) is closed, the length direction of rectangular push pedal (548) is on a parallel with the horizontal plane, the lower side of rectangular push pedal (548) flushes with the lower extreme of end plate (546).

9. The blast furnace slag pond accurate slag grabbing system according to claim 1, wherein the blast furnace slag pond accurate slag grabbing system further comprises a grab mechanism control system (9), and the grab mechanism control system (9) comprises a grab mechanism horizontal position control system (91), a grab mechanism height position control system (92) and a grab mechanism slag digging and discharging action control system (93).

10. The blast furnace slag bottom filter accurate slag catching system according to claim 9,

the grab bucket mechanism horizontal position control system (91) comprises a cart mechanism control module (911) and a trolley mechanism control module (912), wherein the cart mechanism control module (911) can control the position of a cart mechanism (2) on a cart track (1), and the trolley mechanism control module (912) can control the position of a trolley mechanism (4) on a trolley track (3);

the grab bucket mechanism height position control system (92) comprises a first hydraulic cylinder control module (921) and a second hydraulic cylinder control module (922), wherein the first hydraulic cylinder control module (921) can control the telescopic length of the first hydraulic cylinder (55), and the second hydraulic cylinder control module (922) can control the telescopic length of the second hydraulic cylinder (56);

the grab bucket mechanism slag digging and discharging action control system (93) comprises an opening and closing hydraulic cylinder control module (931) and a material driving action control module (932), wherein the opening and closing hydraulic cylinder control module (931) can control the opening and closing hydraulic cylinder (542) to stretch and retract, and the material driving action control module (932) can enable the grab bucket mechanism (54) to push slag particles to form accumulation.

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