Double-tube material distributor for automatic slag feeding system of continuous casting machine

Abstract

The present invention discloses a double-tube material distributor for the automatic protective slag adding system of a continuous casting machine, comprising a double discharging tube, a material distributor plug, a supporting mechanism, a fixed base, and a sliding base. The double discharging tube is in a "Y" shape as a whole, the tail is gathered and each tube is connected to a protective slag conveying device, the front end is bifurcated and each tube is connected to the material distributor plug, and the middle part is fixed to the sliding base through the supporting mechanism. The double discharging tube and the material distributor plug have a downward slope, the fixed base is arranged on one side of the crystallizer, and the sliding base is detachably mounted and fixed to the fixed base. The advantages of the present invention are: it realizes automatic and uniform slag adding, and the double-tube structure realizes independent control of the slag adding amount on both sides of the water inlet, which is conducive to adjusting the uneven thickness of the slag layer on both sides of the water inlet.

Description

Technical Field

[0001] The invention relates to a material dividing device, in particular to a double-tube material dividing device used for an automatic protective slag adding system of a continuous casting machine, belonging to the technical field of continuous casting. Background Art

[0002] Continuous casting is one of the core process links of steelmaking. Molten steel flows into the continuous casting machine for straightening and forming after passing through the ladle, tundish, submerged nozzle and crystallizer in sequence. At present, in order to improve the quality of finished steel billets, it is usually necessary to evenly lay protective slag on the surface of the molten steel in the crystallizer to achieve the following purposes: 1. Insulate and prevent heat dissipation; 2. Separate the air to prevent oxygen in the air from entering the molten steel and causing secondary oxidation that affects the quality of the steel; 3. Absorb and dissolve the inclusions that float from the molten steel to the slag interface to purify the molten steel.

[0003] In order to achieve good use effect of protective slag for small square billet products, it is usually added from the four sides of the submerged nozzle and follow the principle of "frequent addition, small addition and uniform addition" to ensure that the addition speed and consumption speed of the slag layer meet the corresponding requirements, and avoid quality defects of the billet caused by too thick or too thin slag layer.

[0004] In the prior art, the work of adding protective slag is done manually, and the amount of protective slag added is also completely controlled by manual experience. Since the protective slag adding process has strict requirements, it brings huge pressure to the pouring work of the caster in the continuous casting. Frequently adding protective slag to each crystallizer greatly increases the labor intensity of the workers. In addition, the manual method of adding protective slag is affected by factors such as the workers' sense of responsibility, and the quality of the added slag is difficult to guarantee, which will ultimately directly affect the quality of the continuous casting billet and even the steel product. In addition, the consumption rate of protective slag at various positions in the crystallizer is also different, which easily leads to the situation that the thickness of the slag layer is different, which increases the difficulty of automatic slag addition. Summary of the invention

[0005] Purpose of the invention: In view of the above-mentioned problems, the purpose of the present invention is to provide a double-tube material distribution device for the automatic protective slag adding system of a continuous casting machine, so as to realize the automatic and uniform addition of protective slag around the submerged water nozzle, and at the same time realize the separate slag adding control on both sides of the submerged water nozzle, so as to evenly maintain the slag layer thickness in the crystallizer.

[0006] Technical solution: A double-tube material distribution device for the automatic protective slag adding system of a continuous casting machine, comprising a double discharge tube, a distribution plug, a supporting mechanism, a fixed base, and a sliding base. The double discharge tube is in a "Y" shape as a whole, with the tail gathered and each tube connected to a protective slag conveying device, the front end branched and each tube connected to the distribution plug, and the middle part fixed to the sliding base through the supporting mechanism. The double discharge tube and the distribution plug have a downward slope, the fixed base is arranged on one side of the crystallizer, and the sliding base is detachably mounted and fixed to the fixed base; the distribution plug includes a rear connecting part and a front slide part, the connecting part is sealed and fixed to the double discharge tube, the slide part adopts a flow channel structure of first gathering, then dividing, and finally expanding, and is provided with a side slag outlet and a front slag outlet, and the side slag outlets of the two distribution plugs are arranged opposite to each other.

[0007] The principle of the present invention is: when installing the material distribution device, first position and install the fixed base on one side of the crystallizer, and then install the double-tube material distribution device on the fixed base through the sliding base. Since the sliding base and the fixed base adopt a detachable structure, the overall installation positioning and disassembly separation of the material distribution device are convenient. After installation, the front end of the double discharge pipes branches into the liquid surface on both sides of the submerged water inlet, and each pipe at the rear end is connected to a protective slag conveying device. When adding protective slag, the two protective slag conveying devices discharge at the same time, and respectively convey protective slag into the material distribution plug through the double discharge pipes, and then evenly add slag to the surrounding of the submerged water inlet through the side slag outlet and the front slag outlet, following the slag adding principle of "frequent addition, small addition and uniform addition". At the same time, the double-tube structure is adopted. When the consumption speed of protective slag on both sides of the submerged water inlet is not synchronized, the slag discharge speed of the two protective slag conveying devices can be adjusted to achieve uniform thickness of the slag layer and improve the quality of the continuous casting billet. In addition, the flow channel structure of the chute section, which first gathers the flow, then divides the flow, and finally expands the flow, not only increases the number of slag adding ports and ensures uniform slag adding, but is also more in line with the fluid dynamics design, making the flow of the protective slag in the chute section more stable.

[0008] Preferably, the slide portion includes a bottom plate and an outer baffle, an inner baffle, a long obtuse-angled plate, and a short obtuse-angled plate fixed on the bottom plate, the outer baffle and the inner baffle being relatively arranged on both sides of the bottom plate in the width direction, the inner baffle being provided with the side slag outlet, the long obtuse-angled plate being located between the outer baffle and the inner baffle, the rear end of the long obtuse-angled plate being a beveled edge sealed and fixed to the outer baffle, and the front end being a straight edge arranged along the length direction of the bottom plate, the straight edge of the long obtuse-angled plate cooperating with the inner baffle to form the front slag outlet, the short obtuse-angled plate being located at the long obtuse Between the straight edge of the angle plate and the inner baffle plate, the rear end is a straight edge arranged along the length direction of the bottom plate, and the front end is a beveled edge connected to the front edge of the side slag outlet; the beveled edge of the long obtuse angle plate is used to gather the protective slag to form the "flow-gathering" structure of the slide part, and the straight edge of the short obtuse angle plate is used to divide the gathered protective slag and send the slag to the side slag outlet and the front slag outlet respectively to form the "diversion" structure of the slide part, and the beveled edge of the short obtuse angle plate is used to cooperate with the straight edge of the long obtuse angle plate to form the "flow expansion" structure of the slide part in the direction of the front slag outlet.

[0009] Preferably, the opening of the side slag outlet is greater than the length of the hypotenuse of the short obtuse-angle plate, so as to form a "flow expansion" structure of the slide portion in the direction of the side slag outlet.

[0010] Furthermore, a quick-insert connector is included, wherein the quick-insert connector includes a sealed input double tube and an output double tube, wherein the output double tube is inserted into the discharge double tube, and the input double tube is connected to the protective slag silo. In the prior art, the discharge double tube and the discharge tube of the protective slag silo are likely to be mismatched. The quick-insert connector can solve the connection problem in advance, making it easier to connect the protective slag silo and the discharge double tube.

[0011] Furthermore, the quick-plug connector also includes a protective cover, which is a frame with an opening at one end, and a bottom sealing sleeve of which is arranged on the input double tube with the open end facing the output double tube. After the output double tube is inserted into the discharge double tube, the protective cover covers the connection between the output double tube and the discharge double tube to prevent on-site impurities from entering the discharge double tube through the connection and mixing into the protective slag, and at the same time prevent the protective slag dust in the tube from diffusing into the air to protect the on-site environment.

[0012] Preferably, a vertical block and a combined clamp block are provided on the fixed base, a transverse block is fixed on the top of the vertical block, the vertical block and the transverse block are L-shaped as a whole, a notch matching the transverse block is provided in the middle of the sliding base, and an outer protrusion matching the combined clamp block is provided at the front end; after the transverse block is inserted into the notch, the sliding base moves forward to drive the outer protrusion to insert into the combined clamp block, thereby forming a detachable connection structure between the sliding base and the fixed base.

[0013] Preferably, the supporting mechanism comprises a supporting vertical rod, a supporting oblique rod, a screw rod and a knob, a double-ear joint and an inclined support member are provided on the sliding base, the top and bottom of the supporting vertical rod are respectively connected to the discharge double tube and the double-ear joint through a rotating shaft, a threaded hole is opened in the middle, the screw rod is fixed in the threaded hole, one end of the supporting oblique rod is fixed to the discharge double tube through a rotating shaft, and the other end has a hook part, the hook part is hooked on the screw rod and is tightened and fixed by the knob, the supporting vertical rod abuts against the inclined support member so that the discharge double tube has a downward slope.

[0014] Furthermore, the front end bifurcation angle of the double discharge pipes is 10 to 45 degrees.

[0015] Beneficial effects: Compared with the prior art, the advantages of the present invention are: 1. Multiple slag adding ports are arranged around the submerged nozzle, which is conducive to achieving uniform slag adding. 2. The protective slag on both sides of the submerged nozzle can achieve separate slag adding control, which is conducive to overcoming the situation that the thickness of the slag layer is different on the left and right. 3. The plug-in installation structure is adopted, which is more convenient for installation and maintenance. 4. The foldable overall structure is adopted, which is conducive to the maintenance of the submerged nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the working state of the present invention;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention in a folded state;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the material distribution plug;

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the quick-connect connector;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the fixed base;

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the sliding base;

[0022] Figure 7 This is a structural schematic diagram of the sliding base in plug-in state;

[0023] Figure 8 for Figure 1 A magnified schematic diagram of position A in the middle. DETAILED DESCRIPTION

[0024] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. These embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0025] A double-tube material distribution device for the automatic protection slag system of a continuous casting machine, as shown in the attached Figure 1 , 2 As shown, it includes a discharge double pipe 1, a material distribution plug 2, a support mechanism 3, a fixed base 4, a sliding base 5, a quick-connect connector 6, a vertical stopper 7, a combination clamping block 8, and a horizontal stopper 9.

[0026] The discharge double pipe 1 is in a "Y" shape as a whole, with the tail gathered and each pipe connected to a protective slag conveying device, the front end forked and each pipe connected to a material distribution plug 2, and the middle part is fixed to the sliding base 5 through a supporting mechanism 3. The discharge double pipe 1 and the material distribution plug 2 have a downward slope, and the fixed base 4 is arranged on one side of the crystallizer. The sliding base 5 is detachably installed and fixed to the fixed base 4; the material distribution plug 2 is as shown in the attached Figure 3 As shown, it includes a connection part 21 at the rear and a slide part 22 at the front. The connection part 21 is sealed and fixed to the discharge double tube 1. The slide part 22 adopts a flow channel structure of first converging, then diverting, and finally expanding, and is provided with a side slag outlet a and a front slag outlet b. The side slag outlets a of the two material distribution plugs 2 are arranged relatively. In this embodiment, in order to facilitate the arrangement of the front end bifurcation of the discharge double tube 1 to both sides of the immersion water outlet, the front end bifurcation angle of the discharge double tube 1 is preferably 10 to 45°. At the same time, in order to facilitate the gathering of the tail and the sealed docking with the distribution plug, the discharge double tube preferably adopts a square tube design, and is sealed and connected to the distribution plug through a square flange.

[0027] In this embodiment, when the discharge double pipe 1 is connected to the protective slag silo, since the discharge pipe of the protective slag silo on site is a round pipe, and the discharge double pipe is a square pipe, in order to facilitate the connection between the two, it is preferred to use a quick plug connector 6 for connection. Figure 4 As shown, the quick-plug connector 6 includes an input double tube 61, an output double tube 62, and a protective cover 63, wherein the input double tube 61 is a round tube, and the output double tube 62 is a square tube, both of which are designed in parallel. The input double tube 61 is sealed and connected to the output double tube 62, and the output double tube 62 is inserted into the discharge double tube 1. The input double tube 61 is connected to the protective slag bin, so as to facilitate the connection of the discharge double tube to the protective slag bin. At the same time, the protective cover 63 is a rectangular plate folded into a frame with an opening at one end. The bottom sealing sleeve of the frame is arranged on the input double tube 61, and the open end faces the output double tube 62. After the output double tube 62 is inserted into the discharge double tube 1, the protective cover 63 covers the plug-in place of the output double tube 62 and the discharge double tube 1, thereby forming a shielding protection for the plug-in place.

[0028] In this embodiment, in order to form a flow channel structure in which the flow is first gathered, then divided, and finally expanded in the slideway portion, the slideway portion 22 is as shown in the attached Figure 3As shown, it specifically includes a bottom plate 22a and an outer baffle plate 22b, an inner baffle plate 22c, a long obtuse angle plate 22d, and a short obtuse angle plate 22e fixed on the bottom plate 22a. The outer baffle plate 22b and the inner baffle plate 22c are relatively arranged on both sides of the width direction of the bottom plate 22a. The inner baffle plate 22c is provided with a side slag outlet a. The long obtuse angle plate 22d is located between the outer baffle plate 22b and the inner baffle plate 22c. The rear end of the long obtuse angle plate 22d is a beveled edge sealed and fixed with the outer baffle plate 22b, and the front end is a straight edge arranged along the length direction of the bottom plate 22a. The straight edge of the long obtuse angle plate 22d cooperates with the inner baffle plate 22c to form a front slag outlet b. The short obtuse angle plate 22e is located between the straight edge of the long obtuse angle plate 22d and the inner baffle plate 22c. The rear end is a straight edge arranged along the length direction of the bottom plate 22a, and the front end is a beveled edge connected to the front edge of the side slag outlet a; the beveled edge of the long obtuse angle plate 22d is used to gather the protective slag to form the "flow gathering" structure of the chute part 22, and the straight edge of the short obtuse angle plate 22e is used to divide the gathered protective slag and send the slag to the side slag outlet a and the front slag outlet b respectively to form the "flow diversion" structure of the chute part 22, and the beveled edge of the short obtuse angle plate 22e is used to cooperate with the straight edge of the long obtuse angle plate 22d to form the "flow expansion" structure of the chute part 22 in the direction of the front slag outlet b, and the opening of the side slag outlet a is greater than the length of the beveled edge of the short obtuse angle plate 22e to form the "flow expansion" structure of the chute part 22 in the direction of the side slag outlet a. In this embodiment, the "obtuse angle plate" including the long obtuse angle plate 22d and the short obtuse angle plate 22e refers to two plates with an obtuse angle after being connected.

[0029] In this embodiment, as shown in the attached Figures 5 to 7 As shown, in order to form a detachable connection structure between the sliding base and the fixed base, a vertical stopper 7 and a combined clamping block 8 are provided on the fixed base 4, a transverse stopper 9 is fixed on the top of the vertical stopper 7, and the vertical stopper 7 and the transverse stopper 9 are L-shaped as a whole. A notch 51 matching the transverse stopper 9 is provided in the middle of the sliding base 5, and an outer protrusion 52 matching the combined clamping block 8 is provided at the front end; after the transverse stopper 9 is inserted into the notch 51, the sliding base 5 moves forward to drive the outer protrusion 52 to insert into the combined clamping block 8. The combined clamping block 8 in this embodiment is specifically two rectangular plates, which are relatively arranged on the fixed base 4 and are located on the same side of the fixed base 4 as the vertical stopper 7. At the same time, in order to facilitate the insertion of the outer protrusion 52, chamfers are provided on the opposite side walls of the two rectangular plates.

[0030] In this embodiment, as shown in the attached Figure 8As shown, the support mechanism 3 specifically includes a support vertical rod 31, a support oblique rod 32, a screw rod 33, and a knob 34. A double-ear joint 53 and an inclined support member 54 are provided on the sliding base 5. The top and bottom of the support vertical rod 31 are respectively connected to the discharge double tube 1 and the double-ear joint 53 through a rotating shaft, and a threaded hole is opened in the middle, and the screw rod 33 is fixed in the threaded hole. One end of the support oblique rod 32 is fixed to the discharge double tube 1 through a rotating shaft, and the other end has a hook part 32a, which is hooked on the screw rod 33 and tightened and fixed by the knob 34. The support vertical rod 31 is against the inclined support member 54. The inclined support member 54 in this embodiment is shown in the attached figure. Figure 6 As shown, it specifically includes two columns and an inclined baffle plate fixed on the two columns, and the supporting vertical rod 31 is against the inclined baffle plate.

[0031] When installing the double-tube material distribution device of this embodiment, first position and install the fixed base 4 on one side of the crystallizer, then insert the sliding base 5, and through the cooperation of the vertical block 7, the horizontal block 9 and the notch 51, the combination clamp 8 and the outer protrusion 52 form a positioning, and complete the installation of the bottom of the double-tube material distribution device. Then, hook the hook part 32a of the support inclined rod 32 to the screw rod 33 on the support vertical rod 31, and tighten and fix it by the knob 34 to complete the upper installation and fixation of the double-tube material distribution device. Finally, rotate the support vertical rod 31 to abut against the inclined support member 54, and complete the overall installation of the double-tube material distribution device probing into both sides of the immersion nozzle.

[0032] When maintaining the submerged water outlet, lift and loosen the knob 34, remove the hook portion 32a from the screw rod 33, and rotate the supporting vertical rod 31 to a horizontal position, so that the double-tube material distribution device can be folded and retracted, thereby maintaining the submerged water outlet without removing the double-tube material distribution device, which is convenient and quick.

[0033] When disassembling, the sliding base 5 is pushed in the reverse direction, the combined clamping block 8 and the outer protrusion 52 are pulled out, and the vertical stopper 7 and the horizontal stopper 9 are separated from the notch 51, and then the disassembly can be completed.

[0034] The double-tube material distributor of this embodiment arranges multiple slag adding ports around the submerged nozzle, which is conducive to achieving uniform slag adding. At the same time, the protective slag on both sides of the submerged nozzle is controlled separately, which is conducive to overcoming the uneven thickness of the slag layer.

Claims

1. A double-tube material distribution device for the automatic protection slag system of a continuous casting machine, characterized in that: The invention comprises a discharge double tube (1), a material distribution plug (2), a support mechanism (3), a fixed base (4), and a sliding base (5); the discharge double tube (1) is in a "Y" shape as a whole, with a rear end gathered and each tube connected to a protective slag conveying device, a front end branched and each tube connected to the material distribution plug (2), and a middle part fixed to the sliding base (5) through the support mechanism (3); the discharge double tube (1) and the material distribution plug (2) have a downward slope, the fixed base (4) is arranged on one side of the crystallizer, and the sliding base (5) is detachably mounted and fixed to the fixed base (4); the material distribution plug (2) includes The invention relates to a method for preparing a slag discharger having a plurality of discharge ports (21) and a plurality of discharge ports (22). The slag discharger has a plurality of discharge ports (21) and a plurality of discharge ports (22) arranged in a plurality of directions. The slag discharger has a plurality of discharge ports (21) and a plurality of discharge ports (22) arranged in a plurality of directions. The slag discharger has a plurality of discharge ports (21) and a plurality of discharge ports (22) arranged in a plurality of directions. The slag discharger has a plurality of discharge ports (21) and a plurality of discharge ports (22) arranged in a plurality of directions. The slag discharger has a plurality of discharge ports (21) and a plurality of discharge ports (22) arranged in a plurality of directions. The slag discharger has a plurality of discharge ports (21) and a plurality of discharge ports (22) arranged in a plurality of directions. ) are relatively arranged on both sides of the width direction of the bottom plate (22a), the inner baffle plate (22c) is provided with the side slag outlet (a), the long obtuse angle plate (22d) is located between the outer baffle plate (22b) and the inner baffle plate (22c), the rear end of which is a beveled edge sealed and fixed with the outer baffle plate (22b), and the front end is a straight edge arranged along the length direction of the bottom plate (22a), the straight edge of the long obtuse angle plate (22d) cooperates with the inner baffle plate (22c) to form the front slag outlet (b), the short obtuse angle plate (22e) is located between the straight edge of the long obtuse angle plate (22d) and the inner baffle plate (22c), the rear end of which is The straight edge and the front end of the bottom plate (22a) are arranged along the length direction and are connected to the oblique edge of the front edge of the side slag outlet (a); the oblique edge of the long obtuse-angled plate (22d) is used to gather the protective slag to form the "flow-gathering" structure of the slide part (22); the straight edge of the short obtuse-angled plate (22e) is used to divide the gathered protective slag and send the slag to the side slag outlet (a) and the front slag outlet (b) respectively to form the "flow-diverting" structure of the slide part (22); the obtuse edge of the short obtuse-angled plate (22e) is used to cooperate with the straight edge of the long obtuse-angled plate (22d) to form the "flow-expanding" structure of the slide part (22) in the direction of the front slag outlet (b).

2. The device according to claim 1, characterized in that: The opening of the side slag outlet (a) is greater than the length of the hypotenuse of the short obtuse-angle plate (22e), so as to form a "flow expansion" structure of the slideway portion (22) in the direction of the side slag outlet (a).

3. The device according to claim 1, characterized in that: It also includes a quick-connect connector (6), which includes an input double tube (61) and an output double tube (62) that are sealed and connected to each other. The output double tube (62) is inserted into the discharge double tube (1), and the input double tube (61) is connected to an external protective slag silo.

4. The device according to claim 3, characterized in that: The quick-connect connector (6) further comprises a protective cover (63), which is a frame having an opening at one end, and a bottom sealing sleeve thereof is arranged on the input double tube (61), with the open end facing the output double tube (62). After the output double tube (62) is inserted into the discharge double tube (1), the protective cover (63) shields and covers the plug-in portion between the output double tube (62) and the discharge double tube (1).

5. The device according to claim 1, characterized in that: The fixed base (4) is provided with a vertical stopper (7) and a combined clamping block (8); a transverse stopper (9) is fixed on the top of the vertical stopper (7); the vertical stopper (7) and the transverse stopper (9) are L-shaped as a whole; a notch (51) matching the transverse stopper (9) is provided in the middle of the sliding base (5); and an outer protrusion (52) matching the combined clamping block (8) is provided at the front end; after the transverse stopper (9) is inserted into the notch (51), the sliding base (5) moves forward to drive the outer protrusion (52) to be inserted into the combined clamping block (8), thereby forming a detachable connection structure of the sliding base (5) and the fixed base (4).

6. The device according to claim 1, characterized in that: The support mechanism (3) comprises a support vertical rod (31), a support oblique rod (32), a screw rod (33), and a knob (34); a double-ear joint (53) and an inclined support member (54) are provided on the sliding base (5); the top and bottom of the support vertical rod (31) are respectively connected to the discharge double tube (1) and the double-ear joint (53) through a rotating shaft; a threaded hole is provided in the middle; the screw rod (33) is fixed in the threaded hole; one end of the support oblique rod (32) is fixed to the discharge double tube (1) through a rotating shaft; the other end has a hook portion (32a); the hook portion (32a) is hooked on the screw rod (33) and is tightened and fixed by the knob (34); the support vertical rod (31) abuts against the inclined support member (54).

7. The device according to claim 1, characterized in that: The front end bifurcation angle of the discharge double pipe (1) is 10-45°.

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