A continuous casting machine long nozzle closure structure

Abstract

The utility model discloses a continuous casting machine long shuikou closed structure relates to continuous casting machine long shuikou technical field, including long shuikou pipe, the outside sleeve joint of long shuikou pipe is provided with built -in sealing mechanism, the outside pressure joint of built -in sealing mechanism is provided with external sealing mechanism, the utility model solves the long shuikou mechanical seal of present and difficult still can keep good sealing effect under thermal expansion and mechanical stress, and the problem that the cooling efficiency of existing sealing element is not high, the utility model passes through the clamping of the setting of sleeve ring and the setting of cavity, makes the cooling liquid can circulate setting in built -in sealing mechanism and external sealing mechanism outer end after connection, realizes sealing element cooling, promotes component life, through the vertical connection of extruding piece and seal disc, the clamping of grommet to sleeve ring and first long shuikou sleeve pipe, and the positioning clamping of extruding piece and first long shuikou sleeve pipe, make this long shuikou still can keep good sealing effect under thermal expansion and mechanical stress.

Description

Technical Field

[0001] This utility model relates to the field of long nozzle technology for continuous casting machines, specifically a closed structure for long nozzles of continuous casting machines. Background Technology

[0002] The long nozzle is used between the ladle and the tundish to protect molten steel from secondary oxidation and prevent splashing. It plays an important role in improving safety during the casting process. Secondary oxidation will seriously contaminate the molten steel in the continuous casting tundish, thus causing inclusion quality defects in the slabs produced later. Therefore, the sealing protection between the ladle outlet and the long nozzle of the ladle is particularly important for casting.

[0003] Nowadays, long nozzles are sealed to the crystallizer or tundish through mechanical structures such as clamping devices, sealing rings or gaskets. This sealing method usually uses sealing rings made of graphite or other high-temperature resistant materials between the long nozzle and the crystallizer. Although the existing sealing technology is relatively mature, simple mechanical seals are difficult to maintain a good sealing effect under thermal expansion and mechanical stress. At the same time, the cooling efficiency of existing seals is not high, resulting in a short service life of the sealing components.

[0004] To address the aforementioned issues, a long nozzle sealing structure for continuous casting machines is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a sealing structure for a long nozzle of a continuous casting machine, which solves the problem that current mechanical seals for long nozzles in the background technology cannot maintain a good sealing effect under thermal expansion and mechanical stress, and that the existing sealing components have low cooling efficiency, resulting in a short service life of the sealing components.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a long nozzle sealing structure for a continuous casting machine, comprising a long nozzle tube, an internal sealing mechanism sleeved on the outer side of the long nozzle tube, and an external sealing mechanism press-fitted on the outer side of the internal sealing mechanism. The long nozzle tube includes a first long nozzle sleeve and a second long nozzle sleeve fitted to one side of the first long nozzle sleeve. The internal sealing mechanism includes a collar fitted to the sides of the first and second long nozzle sleeves. A gasket is engaged between the first long nozzle sleeve and the collar, and between the second long nozzle sleeve and the collar. An upper retaining ring and a lower retaining ring are respectively provided at the upper and lower ends of the gasket and the collar. The external sealing mechanism includes an extrusion piece and a sealing plate sleeved and vertically connected to the outside of the internal sealing mechanism.

[0007] Preferably, a side bending block is fixedly provided at one end of the first long nozzle sleeve and the second long nozzle sleeve.

[0008] Preferably, the two sides of the collar are fixedly provided with locking blocks for inserting the retaining ring.

[0009] Preferably, the built-in sealing mechanism further includes an L-shaped gasket that is filled and engaged between the lower retaining ring, the extruder, the sleeve, and the external sealing mechanism.

[0010] Preferably, the built-in sealing mechanism further includes six sets of rubber pads for filling.

[0011] Preferably, the external sealing mechanism further includes a rod for fixing and connecting the extrusion member, and ten sets of the rods are provided, with a nut rotatably sleeved on the upper end of the rod.

[0012] Preferably, an outer ring is fitted between the extruder and the sealing disc, and a coolant cavity exists between the outer ring and the built-in sealing mechanism.

[0013] Preferably, cooling pipes are connected to both sides of the outer ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The present invention provides a long nozzle sealing structure for a continuous casting machine. Through the locking setting of the retaining ring and the setting of the cavity between the upper retaining ring and the external sealing mechanism, the coolant can be circulated to the outer end of the internal sealing mechanism and the external sealing mechanism after connection, thereby cooling the sealing components, improving the service life of the components, and solving the problem of low cooling efficiency of the current long nozzle seals, which leads to short service life of the sealing components.

[0016] 2. The present invention provides a long nozzle sealing structure for a continuous casting machine. Through the vertical connection of the extrusion component and the sealing plate, the engagement of the gasket with the sleeve and the first long nozzle sleeve, and the positioning and locking of the extrusion component and the first long nozzle sleeve, the long nozzle can maintain a good sealing effect under thermal expansion and mechanical stress, prevent misalignment and movement, and be fixed by layer extrusion. This solves the problem that current long nozzle mechanical seals are difficult to maintain a good sealing effect under thermal expansion and mechanical stress. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model. Figure 1 ;

[0019] Figure 3 This is a schematic diagram of the overall disassembled structure of this utility model. Figure 2 ;

[0020] Figure 4 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0021] Figure 5 This is a schematic cross-sectional view of the present invention. Figure 1 ;

[0022] Figure 6 This is a schematic cross-sectional view of the present invention. Figure 2 .

[0023] In the diagram: 1. Long nozzle pipe; 11. First long nozzle sleeve; 111. Side bend block; 12. Second long nozzle sleeve; 2. Internal sealing mechanism; 21. Sleeve ring; 211. Clamping block; 22. Washer ring; 23. Lower clamping ring; 24. Upper clamping ring; 25. Rubber gasket; 26. L-shaped gasket; 3. External sealing mechanism; 31. Extrusion part; 32. Insert rod; 33. Sealing plate; 34. Nut; 35. Outer ring; 351. Cooling pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0026] Combination Figure 1 This utility model discloses a long nozzle sealing structure for a continuous casting machine, comprising a long nozzle pipe 1, an internal sealing mechanism 2 sleeved on the outside of the long nozzle pipe 1, and an external sealing mechanism 3 press-fitted on the outside of the internal sealing mechanism 2. The long nozzle pipe 1 includes a first long nozzle sleeve 11 and a second long nozzle sleeve 12 fitted to one side of the first long nozzle sleeve 11. The internal sealing mechanism 2 includes a collar 21 fitted to the sides of the first long nozzle sleeve 11 and the second long nozzle sleeve 12. A gasket 22 is engaged between the first long nozzle sleeve 11 and the collar 21, and between the second long nozzle sleeve 12 and the collar 21. An upper retaining ring 24 and a lower retaining ring 23 are respectively provided at the upper and lower ends of the gasket 22 and the collar 21. The external sealing mechanism 3 includes an extrusion piece 31 and a sealing plate 33 sleeved on the outside of the internal sealing mechanism 2 and vertically connected.

[0027] Specifically, the first long nozzle sleeve 11 and the second long nozzle sleeve 12 correspond to each other. The collar 21 is sleeved and fitted to the outer ends of the first long nozzle sleeve 11 and the second long nozzle sleeve 12. The gasket 22 realizes the crimping between the long nozzle tube 1 and the collar 21. The lower retaining ring 23 and the upper retaining ring 24 are set at the outer end of the collar 21 to realize compression and fixation. The locking setting of the collar 21 and the setting of the cavity between the upper retaining ring 24 and the external sealing mechanism 3 allow the coolant to circulate at the outer ends of the built-in sealing mechanism 2 and the external sealing mechanism 3 after connection, realizing the cooling of the seal and improving the service life of the component. The vertical connection of the extrusion part 31 and the sealing plate 33, the locking of the gasket 22 to the collar 21 and the first long nozzle sleeve 11, and the positioning locking of the extrusion part 31 and the first long nozzle sleeve 11 enable this long nozzle to maintain a good sealing effect under thermal expansion and mechanical stress, prevent misalignment and movement, and achieve layer-by-layer compression and fixation.

[0028] The present invention will be further described below with reference to the embodiments.

[0029] Example 1:

[0030] Combination Figures 2-5 A side bend block 111 is fixedly provided at one end of the first long water inlet sleeve 11 and the second long water inlet sleeve 12. The side bend blocks 111 at one end of the first long water inlet sleeve 11 and the second long water inlet sleeve 12 fit together. The outer sleeve ring 21 prevents lateral misalignment. Two sets of washers 22 are engaged on the side of the side bend block 111.

[0031] Both sides of the collar 21 are fixedly provided with locking blocks 211 for inserting the upper retaining ring 24. The side end of the locking block 211 is provided with an oblique opening. The locking block 211 at one end is used to insert the upper retaining ring 24, so that the upper retaining ring 24 is positioned and fixed. The locking block 211 at the other end is fitted with the lower retaining ring 23 to achieve locking.

[0032] The built-in sealing mechanism 2 also includes an L-shaped gasket 26 that fills and engages between the lower retaining ring 23, the extrusion piece 31, the collar 21 and the external sealing mechanism 3. The L-shaped gasket 26 fills and engages between the built-in sealing mechanism 2 and the external sealing mechanism 3, ensuring the stability of the entire device's closed structure. At the same time, rubber gaskets 25 are provided at both ends of the L-shaped gasket 26 to achieve multi-layer sealing.

[0033] The built-in sealing mechanism 2 also includes rubber pads 25 for filling. There are six sets of rubber pads 25. The six sets of rubber pads 25 fill the gaps to ensure the sealing between the built-in sealing mechanism 2 and the external sealing mechanism 3, and also to ensure that the coolant can circulate in the cavity between the built-in sealing mechanism 2 and the external sealing mechanism 3 to achieve cooling.

[0034] Example 2:

[0035] Combination Figure 5 and Figure 6The external sealing mechanism 3 also includes a rod 32 that is fixedly connected to the extrusion member 31. The rod 32 is provided with ten sets. The upper end of the rod 32 is rotatably sleeved with a nut 34. The rotatable connection between the rod 32 and the nut 34 realizes the pressure fixation of the sealing plate 33 and the extrusion member 31, and maintains the stability of the device.

[0036] An outer ring 35 is fitted between the extrusion part 31 and the sealing plate 33. There is a coolant cavity between the outer ring 35 and the built-in sealing mechanism 2. The outer ring 35 achieves side sealing.

[0037] Cooling pipes 351 are connected to both sides of the outer ring 35. The cooling pipes 351 realize the circulation and transportation of coolant to ensure the cooling effect when the continuous casting machine is working.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A long nozzle sealing structure for a continuous casting machine, comprising a long nozzle pipe (1), characterized in that: The long water inlet pipe (1) is sleeved with an internal sealing mechanism (2), and the internal sealing mechanism (2) is press-fitted with an external sealing mechanism (3). The long nozzle tube (1) includes a first long nozzle sleeve (11) and a second long nozzle sleeve (12) attached to one side of the first long nozzle sleeve (11). The built-in sealing mechanism (2) includes a collar (21) attached to the sides of the first long nozzle sleeve (11) and the second long nozzle sleeve (12). A washer (22) is engaged between the first long nozzle sleeve (11) and the collar (21), and between the second long nozzle sleeve (12) and the collar (21). An upper retaining ring (24) and a lower retaining ring (23) are respectively provided at the upper and lower ends of the washer (22) and the collar (21). The external sealing mechanism (3) includes an extrusion piece (31) and a sealing plate (33) that are sleeved and vertically connected to the outside of the built-in sealing mechanism (2).

2. The continuous casting machine long nozzle sealing structure according to claim 1, characterized in that: A side bend block (111) is fixedly installed at one end of the first long nozzle sleeve (11) and the second long nozzle sleeve (12).

3. The continuous casting machine long nozzle sealing structure according to claim 1, characterized in that: The two sides of the collar (21) are fixedly provided with locking blocks (211) for inserting the upper retaining ring (24).

4. The continuous casting machine long nozzle sealing structure according to claim 1, characterized in that: The built-in sealing mechanism (2) also includes an L-shaped gasket (26) that is filled and engaged between the lower retaining ring (23), the extruder (31), the collar (21) and the external sealing mechanism (3).

5. The continuous casting machine long nozzle sealing structure according to claim 1, characterized in that: The built-in sealing mechanism (2) also includes six sets of rubber pads (25) for filling.

6. The continuous casting machine long nozzle sealing structure according to claim 1, characterized in that: The external sealing mechanism (3) also includes a plug rod (32) that is fixedly connected to the extrusion member (31). The plug rod (32) is provided with ten sets, and the upper end of the plug rod (32) is rotatably sleeved with a nut (34).

7. The continuous casting machine long nozzle sealing structure according to claim 1, characterized in that: An outer ring (35) is fitted between the extruder (31) and the sealing plate (33), and a coolant cavity exists between the outer ring (35) and the built-in sealing mechanism (2).

8. The continuous casting machine long nozzle sealing structure according to claim 7, characterized in that: Cooling pipes (351) are connected to both sides of the outer ring (35).

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