Inlet water filtering device for crystallizer of continuous casting machine

Abstract

The utility model relates to the technical field of ferrous metallurgy, in particular to a continuous casting machine crystallizer inlet water filtering device which comprises a filter chamber, a filtering assembly, a reversing assembly, a water inlet pipe and a water outlet pipe. The water inlet pipe and the water outlet pipe are respectively connected with the filter chamber; the filter assembly comprises a filter screen supporting piece and at least two filter screens, the filter screens are connected with the filter screen supporting piece, and the filter screen supporting piece is connected with the inner side wall of the filter chamber; the reversing assembly comprises an upper partition plate, a lower partition plate and a reversing rod, the reversing rod penetrates through the filter screen supporting piece, namely, the filter assembly is located between the upper partition plate and the lower partition plate, and the water filtering channel is replaced under the condition that water supply is not interrupted through the separation and reversing effects of the reversing assembly. The water filtering device is simple in structure, water entering the crystallizer is filtered, the casting blank quality problem caused by blockage of a water seam and a nozzle of the crystallizer is avoided, water supply of the crystallizer does not need to be interrupted when the water filtering channel is replaced, and therefore production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of iron and steel metallurgy, in particular to a water inlet filtering device for a continuous casting machine crystallizer. Background Art

[0002] The metallurgical slab crystallizer is an important part of the continuous casting machine. The cooling copper plate of the crystallizer contacts the injected molten steel, forcing it to cool and forming a billet with a liquid core. Then the billet leaves the copper plate and enters the secondary cooling zone, where it is further cooled by spraying water from the nozzle. The role of cooling water is crucial in the entire production process. However, pipeline oxidation causes iron sheets to fall off and slag, and poor water quality contains sand and gravel, which often leads to blockage of water seams and nozzles in the crystallizer, and then causes cracks and bulging on the surface of the billet, which has a great impact on the quality of the billet itself and the subsequent rolling. Moreover, the blockage of water seams and nozzles in the crystallizer requires equipment shutdown for maintenance, which not only reduces production efficiency, but also increases maintenance costs and workers' workload.

[0003] In actual production, a filter is added to the water inlet pipe of the crystallizer to filter the cooling water to solve the problem of water seam and nozzle blockage. However, after running for a period of time, it is found that the filter will be blocked again, and the equipment still needs to be shut down to replace the filter. Utility Model Content

[0004] The utility model aims to provide a continuous casting machine crystallizer water inlet filtering device, which can not only filter the inlet water of the crystallizer, but also replace the water filtering channel to avoid interruption of water supply to the crystallizer due to blockage of the filter screen.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A continuous casting machine crystallizer water inlet filter device comprises a filter chamber, a filter assembly, a reversing assembly, an inlet pipe and an outlet pipe; the inlet pipe and the outlet pipe are respectively connected to the filter chamber; the filter assembly comprises a filter support and at least two filters, the filters are connected to the filter support, and the filter support is connected to the inner wall of the filter chamber; the reversing assembly comprises an upper partition, a lower partition and a reversing rod, one end of the reversing rod passes through the filter support and is connected to the lower partition, and the other end is connected to the upper partition, and its extended part is connected to the rotating part to form a rotating end; the filter assembly is located in the middle of the upper partition and the lower partition.

[0007] The above-mentioned continuous casting machine crystallizer water inlet filtering device, the rotating part includes a connecting rod and a rotating motor, the movable end of the rotating motor is connected to the connecting rod, and grooves are respectively provided on both sides of the other end of the connecting rod, and the inside of the groove is connected to the positioning piece through a spring; the reversing rod is a hollow rod, and two positioning holes matching the positioning piece are provided at its rotating end.

[0008] The above-mentioned continuous casting machine crystallizer water inlet filtration device, the filter support includes a support plate and a partition plate, the bottom of the partition plate is connected to the support plate and assembled inside the filter chamber, the cross-section of the support plate is circular, and water holes are provided thereon, the water holes are located on both sides of the partition plate, and filters are installed on the surrounding walls; the water holes are assembled corresponding to the filter.

[0009] The above-mentioned continuous casting machine crystallizer water inlet filtration device is additionally provided with a recoil water inlet pipe, which is installed on the filter chamber. It has multiple settings, is assembled corresponding to the filter screen, and one end is connected to the outer wall of the filter screen; the pressure of the recoil water inlet pipe is greater than the water inlet pipe pressure.

[0010] In the above-mentioned continuous casting machine crystallizer water inlet filtering device, the lower partition is provided with a recoil water outlet hole, the recoil water outlet hole is connected to a recoil water outlet pipe through a connecting piece, and a one-way valve is provided on the recoil water outlet pipe.

[0011] The above-mentioned continuous casting machine crystallizer water inlet filter device, the filter chamber includes an upper chamber and a lower chamber, the upper chamber and the lower chamber are connected by a flange and bolts, the bottom end of the lower chamber is conical, and the bottom is connected to a slag discharge pipe, and the slag discharge pipe is provided with a slag discharge pipe valve.

[0012] The above-mentioned continuous casting machine crystallizer water inlet filtering device has pressure solenoid valves on the water inlet pipe and the water outlet pipe.

[0013] In the above-mentioned continuous casting machine crystallizer water inlet filtering device, the longitudinal section of the port at the connecting end of the reversing rod and the upper partition is trapezoidal, and the area of ​​the upper cross section is larger than the area of ​​the lower cross section.

[0014] The beneficial effects of adopting the above technical solution are:

[0015] The utility model provides a plurality of filter screens inside, and converts the water filter channel through the reversing rod, the connecting rod and the rotating motor, and then separates the clogged filter screen by the upper partition, the lower partition and the partition plate, thereby realizing the replacement of the water filter channel without interrupting the water supply; the reversing rod and the connecting rod are plug-in connected by the positioning hole and the positioning piece, which is not only simple and reliable in installation, but also realizes the detachable connection between the reversing rod, the connecting rod and the rotating motor, which is more convenient for later inspection and maintenance compared with the fixed connection; the entire filter chamber is divided into an upper chamber and a lower chamber, and the upper chamber and the lower chamber are connected by flanges and bolts, which is also for the convenience of inspection and maintenance of various components inside the filter; at the same time, the cooperation of the backwash inlet pipe, the backwash outlet hole, the backwash outlet pipe and the one-way valve realizes the backwashing of the clogged filter screen, thereby extending the service life of the filter screen.

[0016] The utility model has a simple structure and not only filters the water inlet of the crystallizer to avoid the quality problem of the casting blank caused by the blockage of the water seam and the nozzle of the crystallizer, but also does not need to interrupt the water supply of the crystallizer when replacing the water filtering channel, thereby improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] Figure 1 This is a schematic diagram of the structure of the utility model (not drawn to scale);

[0019] Figure 2 It is a schematic diagram of the enlarged structure of the A part of the utility model (not drawn to scale);

[0020] Figure 3 This is a schematic diagram of the structure of the filter assembly of the utility model (not drawn to scale);

[0021] Figure 4 It is a schematic diagram of the structure of part of the reversing assembly of the utility model (not drawn to scale).

[0022] In the figure: 1. filter chamber; 11. upper chamber; 12. lower chamber; 121. sealing ring; 13. slag discharge pipe; 211. support plate; 212. partition plate; 22. filter screen; 31. upper partition; 32. lower partition; 321. recoil water outlet hole; 322. recoil water outlet pipe; 323. one-way valve; 324. connecting piece; 33. reversing rod; 331. positioning hole; 34. connecting rod; 341. spring; 342. positioning piece; 343. indicator; 35. rotating motor; 4. water inlet pipe; 5. water outlet pipe; 6. recoil water inlet pipe. DETAILED DESCRIPTION

[0023] Example

[0024] like Figure 1-4 As shown, the utility model includes a filter chamber 1, a filter assembly, a reversing assembly, an inlet pipe 4 and an outlet pipe 5; the inlet pipe 4 and the outlet pipe 5 are respectively connected to the filter chamber 1; the filter assembly includes a filter support and two filters 22, the filter 22 is connected to the filter support, and the filter support is fixedly connected to the inner wall of the filter chamber 1; the reversing assembly includes an upper partition 31, a lower partition 32 and a reversing rod 33, one end of the reversing rod passes through the filter support and is connected to the lower partition 32, and the other end is connected to the upper partition 31, and its extended part is connected to the rotating part to form a rotating end, and the reversing rod 33 is driven to rotate by applying a rotating force at this end; the filter assembly is located in the middle of the upper partition and the lower partition, and the water filtration channel is converted by the reversing assembly, and the blocked filter screen is separated, thereby realizing the replacement of the water filtration channel without interrupting the water supply.

[0025] like Figure 1 and 2 As shown, the rotating part of the utility model includes a connecting rod 34 and a rotating motor 35, the movable end of the rotating motor 35 is connected to the connecting rod 34, the other end of the connecting rod 34 passes through the filter chamber 1 and is connected to the reversing rod 33, and a seal is provided at the connection between the connecting rod 34 and the filter chamber 1; grooves are provided on both sides of one end of the connecting rod 34 connected to the reversing rod, and a positioning member 342 is connected to the inside of the groove through a spring 341, and the end of the positioning member 342 connected to the spring 341 is a rectangular parallelepiped, and the cross-section of the other end is a rectangle, and the longitudinal section is a semicircular; the reversing rod 33 is a hollow circular tube, and the longitudinal section of the port at the end connected to the upper partition 31 is a trapezoidal , and the area of ​​the upper cross-section is larger than that of the lower cross-section, which is convenient for the insertion of the connecting rod and the reversing rod. Two positioning holes 331 are provided below the trapezoidal port, and the positioning holes 331 match the positioning pieces 342. Through the insertion connection between the connecting rod 34 and the reversing rod 33, a quick connection between the rotating motor 35 and the reversing rod 33 is realized, thereby facilitating the inspection and maintenance of the reversing assembly. The cross-section of the positioning piece 342 at one end away from the spring 341 is rectangular, and the longitudinal section is semicircular, which not only facilitates the insertion of the positioning piece 342 and the positioning hole 331, but also ensures that the positioning piece 342 will not fall off from the positioning hole 331 when the reversing assembly rotates horizontally.

[0026] like Figure 1 and 3 As shown, the filter support includes a support plate 211 and a partition plate 212. The longitudinal section of the partition plate 212 is rectangular, and its two ends are respectively connected to the inner wall of the filter chamber 1, and the bottom is connected to the upper end surface of the support plate 211. The cross section of the support plate 211 is circular, and it is fixedly connected to the inner wall of the filter chamber 1 on all sides. Two water holes are provided thereon, and the two water holes are respectively located on both sides of the partition plate 212, and a filter 22 is installed on its peripheral wall. The water holes are assembled corresponding to the filter 22; the longitudinal section of the filter 22 is "n"-shaped, and its open end faces the water hole.

[0027] The support plate 211 and the filter screen 22 of the utility model divide the interior of the filter chamber 1 into two areas, one end is the water inlet area, and the interior is the unfiltered cooling water entering through the water inlet pipe 4, and the other end is the water outlet area, and the interior is the filtered cooling water. The upper partition 31 is located in the water outlet area, and its cross-section is semicircular; the lower partition 32 is located in the water inlet area, and its cross-section is also semicircular. The upper partition 31, the lower partition 32 and the partition plate 212 divide the water outlet area into a closed area and an open area.

[0028] In addition, when three filter screens 22 are arranged on the support plate, it is only necessary to adjust the shapes of the partition plate 212, the upper partition plate 31 and the lower partition plate 32 so that one of the filter screens is in the open area and the other two filter screens are in the closed area.

[0029] like Figure 1 and 4 As shown, one end of the reversing rod 33 of the utility model passes through the center of the partition plate 212 and the support plate 211, and is connected to the lower partition plate 32, and the other end is connected to the upper partition plate 31, wherein the reversing rod 33 is connected to the upper partition plate 31 by welding, is axially connected to the support plate 211, and is connected to the lower partition plate 32 by bolts, and the end of the reversing rod 33 connected to the lower partition plate 32 is provided with an internal thread that cooperates with the bolt.

[0030] like Figure 1 As shown, the utility model is also provided with two recoil water inlet pipes 6, which are installed on the filter chamber 1, and are assembled corresponding to the filter screen 22, and one end is connected to the outer wall of the filter screen 22; the pressure of the recoil water inlet pipe 6 is greater than the water inlet pipe pressure, and high-pressure water can be introduced through the recoil water inlet pipe 6 to flush the clogged filter screen, and a valve is also provided on the recoil water inlet pipe 6 to control the opening and closing of the recoil water inlet pipe 6.

[0031] Furthermore, a recoil outlet hole 321 is provided on the lower partition 32, and the recoil outlet hole 321 is connected to a connector 324. The connector 324 is conical, and the bottom end is connected to a recoil outlet pipe 322. A one-way valve 323 is provided at the other end of the recoil outlet pipe. High-pressure water is introduced through the recoil inlet pipe 6 to flush the clogged filter screen, and the sewage is discharged through the recoil outlet pipe. At the same time, the one-way valve ensures that the water flow does not flow in the opposite direction. The sewage discharged through the recoil outlet pipe is discharged through the slag discharge pipe, or filtered through another filter screen into the water outlet area, leaving impurities in the water inlet area, and finally the impurities are discharged through the slag discharge pipe.

[0032] like Figure 1 As shown, the filter chamber 1 includes an upper chamber 11 and a lower chamber 12, and the upper chamber 11 and the lower chamber 12 are connected by flanges and bolts, so that the filter chamber can be opened conveniently for internal inspection and maintenance; the bottom end of the lower chamber 12 is conical, and a slag discharge pipe 13 is connected to the bottom, and a slag discharge pipe valve is provided on the slag discharge pipe 13. After the cooling water is filtered, impurities remain in the water inlet area and gradually settle to the bottom of the lower chamber 12. The slag discharge pipe 13 is opened at regular intervals to remove the internal impurities through the water flow.

[0033] The water inlet pipe 4 and the water outlet pipe 5 of the utility model are both provided with pressure solenoid valves for monitoring the water flow pressure in the pipelines.

[0034] The utility model also includes a control part, which determines whether the filter is blocked by the pressure difference of the pressure solenoid valve. If the difference between the two pressure solenoid valves is greater than the set value, the control part instructs the rotating motor 35 to drive the connecting rod 34 and the reversing rod 33 to rotate, thereby driving the upper partition 31 and the lower partition 32 to rotate, isolating the blocked filter, and allowing the cooling water to flow to another filter, thereby achieving the purpose of replacing the filter.

[0035] Furthermore, sealing rings 121 are respectively provided on the curved ends of the upper baffle 31 and the lower baffle 32 , and the sealing rings 121 are connected to the inner wall of the lower chamber 12 to further seal the connection between the upper baffle 31 and the lower baffle 32 and the lower chamber 12 .

[0036] Furthermore, the lower end surface of the upper partition plate 31 abuts against the upper end surface of the partition plate 212 , and the upper end surface of the lower partition plate 32 abuts against the lower end surface of the support plate 211 .

[0037] Furthermore, a seal is provided at the connection between the reversing rod 33 and the partition plate 212 , and a seal is provided at the connection between the reversing rod 33 and the support plate 211 .

[0038] Furthermore, the connecting rod 34 is also provided with an indicator 343, which is located outside the filter chamber 1, fixedly connected to the connecting rod 34, and located on the same side of the connecting rod 34 as the upper partition 31. Through the indicator 343, it can be clearly seen from the outside of the utility model which filter is clogged.

[0039] Working process: Cooling water enters the filter chamber 1 through the water inlet pipe 4, and flows out through the water outlet pipe 5 after being filtered by the filter screen 22. When the filter screen 22 is blocked, the difference between the pressure solenoid valves on the water inlet pipe 4 and the water outlet pipe 5 is greater than the set value, and the control part instructs the rotating motor 35 to drive the connecting rod 34 and the reversing rod 33 to rotate, thereby driving the upper partition 31 and the lower partition 32 to rotate, isolating the blocked filter screen, so that the cooling water flows to another filter screen, so that the continuous casting machine crystallizer obtains continuous water supply.

[0040] The position of the indicator 343 is used to determine which filter is clogged. The backwash water inlet pipe 6 on that side is opened to flush the clogged filter. At the same time, the slag discharge pipe 13 is opened to discharge impurities through water flow.

[0041] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A continuous casting machine crystallizer water inlet filtering device, characterized in that: The invention comprises a filter chamber (1), a filter assembly, a reversing assembly, a water inlet pipe (4) and a water outlet pipe (5); the water inlet pipe (4) and the water outlet pipe (5) are respectively connected to the filter chamber (1); the filter assembly comprises a filter screen support and at least two filter screens (22), the filter screens (22) are connected to the filter screen support, and the filter screen support is connected to the inner wall of the filter chamber (1); the reversing assembly comprises an upper partition (31), a lower partition (32) and a reversing rod (33), one end of the reversing rod (33) passes through the filter screen support and is connected to the lower partition (32), and the other end is connected to the upper partition (31), and the extension part is connected to the rotating part to form a rotating end; the filter assembly is located between the upper partition (31) and the lower partition (32).

2. The continuous casting machine mold water inlet filtering device according to claim 1, characterized in that: The rotating part comprises a connecting rod (34) and a rotating motor (35); the movable end of the rotating motor (35) is connected to the connecting rod (34); grooves are respectively arranged on both sides of the other end of the connecting rod (34); the interior of the groove is connected to a positioning piece (342) via a spring (341); the reversing rod (33) is a hollow rod, and two positioning holes (331) matching with the positioning piece (342) are arranged at its rotating end.

3. The continuous casting machine mold water inlet filtration device according to claim 1 or 2, characterized in that: The filter screen support component comprises a support plate (211) and a partition plate (212); the bottom of the partition plate (212) is connected to the support plate (211) and is assembled inside the filter chamber (1); the support plate (211) has a circular cross section and is provided with water holes; the water holes are located on both sides of the partition plate (212); a filter screen (22) is installed on the peripheral wall; the water holes are assembled corresponding to the filter screen (22).

4. The continuous casting machine mold water inlet filtering device according to claim 3, characterized in that: A recoil water inlet pipe (6) is added. The recoil water inlet pipe (6) is installed on the filter chamber (1). The recoil water inlet pipe (6) is provided in multiple configurations and is assembled corresponding to the filter screen (22). One end of the recoil water inlet pipe (6) is connected to the outer wall of the filter screen (22). The pressure of the recoil water inlet pipe (6) is greater than the pressure of the water inlet pipe (4).

5. The continuous casting machine mold water inlet filtering device according to claim 4, characterized in that: The lower partition plate (32) is provided with a backwash water outlet hole (321), the backwash water outlet hole (321) is connected to a backwash water outlet pipe (322) via a connecting piece (324), and a one-way valve (323) is provided on the backwash water outlet pipe (322).

6. The continuous casting machine mold water inlet filtering device according to claim 5, characterized in that: The filter chamber (1) comprises an upper chamber (11) and a lower chamber (12), wherein the upper chamber (11) and the lower chamber (12) are connected via a flange and bolts, and the bottom end of the lower chamber (12) is conical and is connected to a slag discharge pipe (13), wherein a slag discharge pipe valve is provided on the slag discharge pipe (13).

7. The continuous casting machine mold water inlet filtering device according to claim 6, characterized in that: The water inlet pipe (4) and the water outlet pipe (5) are both provided with pressure solenoid valves.

8. The continuous casting machine mold water inlet filtering device according to claim 2, characterized in that: The longitudinal section of the port at the connection end of the reversing rod (33) and the upper partition plate (31) is trapezoidal, and the area of ​​the upper cross section is larger than that of the lower cross section.

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