Downhole hold-down mechanism of continuous casting tundish nozzle quick-change device

Abstract

The utility model discloses a collector nozzle pressing mechanism of a continuous casting tundish nozzle quick-changing device, and belongs to the technical field of nozzle quick-changing devices. Pressure tightening devices are arranged on the two sides of the lower portion of the mechanism body. Each pressure tightening device comprises a spring box and a pressure adjusting base. A spring is arranged in the spring box, a transition block is arranged at one end of the spring, and a pressure sensor is arranged on one side of the transition block; a guide rod is arranged at the other end of the spring, an L-shaped ejector rod is arranged at the front end of the guide rod, an ejector block is arranged at the front end of the L-shaped ejector rod, and the ejector block abuts against the lower sliding face of the water outlet. According to the utility model, a worm and gear transmission adjusting mode is adopted, so that the change of the compression amount of the spring is tiny and controllable, the pressure adjusting precision is higher, and when the pressure sensor detects that the pressure value of the spring drops below a pressure alarm safety value, an alarm indication is provided, so that the phenomena of inter-plate air suction and oxidation steel seepage during casting operation under low spring pressure are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of nozzle quick-change devices, and more specifically to a lower nozzle pressing mechanism of a continuous casting tundish nozzle quick-change device. Background Art

[0002] At present, the tundish nozzle quick change technology has been widely used in my country's metallurgical continuous casting system. It has the advantages of greatly increasing the number of single-ladle continuous casting furnaces, improving the molten steel recovery rate and casting machine operation rate, and reducing the comparative cost per ton of steel.

[0003] Currently, the springs that hold the upper and lower nozzles in place in the tundish nozzle quick-change system are tested before installation. Once installed, the spring preload is neither adjustable nor testable. During online use, the spring pressure gradually decreases in high-temperature environments. When the spring pressure falls below a safe value, inter-plate air inhalation and oxidation infiltration are likely to occur. Since the spring pressure cannot be monitored online, there's no early warning when it falls below a safe value, making it impossible to take timely action to prevent inter-plate air inhalation and oxidation infiltration. Summary of the Invention

[0004] 1. Technical problem to be solved by the invention

[0005] In view of the defects and shortcomings of the existing technology, the utility model provides a downspout clamping mechanism of a quick-changing device for the water inlet of a continuous casting intermediate tank. The utility model adopts an adjustment method of a worm gear transmission, so that the compression amount of the spring changes slightly and can be controlled, and the pressure adjustment accuracy is higher. During normal casting operations, a pressure alarm safety value can be set. When the pressure sensor detects that the pressure value of the spring drops below the pressure alarm safety value, an alarm indication is provided to remind the operator to take corresponding measures in time to prevent air suction and oxidation penetration between plates during casting operations under low spring pressure.

[0006] 2. Technical solution

[0007] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0008] The utility model discloses a down nozzle pressing mechanism of a continuous casting tundish nozzle quick-change device, comprising a mechanism body:

[0009] Both sides of the lower part of the mechanism body are provided with pressure adjusting devices, which include a spring box and a pressure adjusting seat;

[0010] The spring box is provided with a spring inside, a transition block is provided at one end of the spring, and a pressure sensor is provided on one side of the transition block; the transition block transmits the pressure of the spring to the pressure sensor for transmission and reading;

[0011] The other end of the spring is provided with a guide rod, and the front end of the guide rod is provided with an L-shaped push rod;

[0012] A shaft is provided in the spring box, and the L-shaped ejector rod rotates relative to the shaft;

[0013] The front end of the L-shaped push rod is provided with a push block, which supports the lower sliding surface of the drain;

[0014] The pressure of the spring is transmitted to the drain outlet through the guide rod, the L-shaped ejector rod and the ejector block, so that the upper surface of the drain outlet and the lower surface of the upper outlet are kept in close contact.

[0015] Furthermore, a groove is provided in the center of the mechanism body, an upper water inlet is placed in the groove, and a lower water outlet is provided at the bottom of the mechanism body.

[0016] Furthermore, a cover plate is provided at the upper end of the mechanism body, an inclined groove is provided on the bottom side of the cover plate, an inclined wedge is inserted into the inclined groove, and the inclined wedge is inserted into the inclined groove on the bottom side of the cover plate to fix the water inlet.

[0017] Furthermore, a heat insulation board is provided at the bottom of the spring box; and a plurality of groups of L-shaped push rods are provided at one end of the spring box adjacent to the drain.

[0018] Furthermore, the upper surface of the top block is designed to be straight in the middle and transitioned to arc-shaped inclined surfaces on both sides.

[0019] Furthermore, a pressure adjustment seat is provided on the side of the spring box away from the drain outlet, a worm gear is provided in the pressure adjustment seat, the outer ring of the worm gear is engaged with the worm, the outer ring of the worm gear is matched with the adjustment rod thread, and an anti-rotation pin is inserted on the rod body of the adjustment rod.

[0020] Furthermore, the rotating worm drives the worm wheel to rotate, and the anti-rotation pin prevents the adjustment rod matched with the worm wheel thread from rotating with the worm wheel, but makes a linear motion toward the center of the mechanism body.

[0021] Furthermore, the tightening force of the adjusting rod is transmitted to the spring through the pressure sensor and the transition block, so that the compression of the spring gradually increases and the pressure also gradually increases. When the pressure value transmitted by the pressure sensor reaches the designed working pressure of the spring, the adjustment stops.

[0022] Furthermore, during normal casting operations, the device can set a pressure alarm safety value, and provide an alarm indication when the pressure sensor detects that the pressure value of the spring drops below the pressure alarm safety value.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0025] The utility model adopts a worm gear transmission adjustment method, so that the compression change of the spring is small and controllable, and the pressure adjustment accuracy is higher. During the normal casting operation, a pressure alarm safety value can be set. When the pressure sensor detects that the pressure value of the spring drops below the pressure alarm safety value, an alarm indication is provided to remind the operator to take corresponding measures in time to prevent the phenomenon of air suction between plates and oxidation penetration of steel during the casting operation under low spring pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a top view of the overall structure of the utility model;

[0027] Figure 2 It is a left side sectional view of the present utility model;

[0028] Figure 3 This is a front view of the guide plate of the utility model;

[0029] Figure 4 This is the front view of the blind plate of the utility model;

[0030] Figure 5 This is the initial state diagram of the normal pouring operation of the utility model;

[0031] Figure 6 This is a diagram showing the new drain port of the present invention being placed in a ready position;

[0032] Figure 7 This is a state diagram of the new drain port of the utility model being placed in the working position;

[0033] Figure 8 This is a state diagram of the blind plate closing the water outlet of the utility model;

[0034] Figure 9 This is a partial structural diagram of the L-shaped push rod of the utility model;

[0035] Figure 10 This is a partial assembly diagram of the pushing device of the utility model;

[0036] Figure 11 This is a partial front view of the pushing device of the utility model;

[0037] Figure 12 The utility model is a blind plate three-dimensional Figure 1 ;

[0038] Figure 13 The utility model is a blind plate three-dimensional Figure 2 ;

[0039] Figure 14 The utility model is a blind plate three-dimensional Figure 3 ;

[0040] Figure 15 This is a top view of the blind plate of the utility model;

[0041] Figure 16 This is a partial assembly diagram of the pushing device of the utility model;

[0042] Figure 17 This is an assembly diagram of the internal structure of the pressure adjustment seat of the present invention.

[0043] In the figure: 1. Mechanism body; 2. Cover plate; 3. Wedge; 4. Pushing device; 5. Pushing arm; 501. U-shaped opening groove; 6. Guide plate; 601. Straight segment guide groove 1; 602. Oblique segment guide groove 2; 603. Straight segment guide groove 3; 7. Pin; 8. Blind plate; 801. Blind plate hook; 802. Groove 1; 803. Opening groove; 804. Groove 2; 805. Groove 3; 9. Clamping device; 901. Clamping spring; 90 2. Push rod; 1001. Front pin; 1002. Rear pin; 11. Spring box; 12. Pressure adjustment seat; 13. Water outlet; 13a. New water outlet; 13b. Original water outlet; 14. Water inlet; 15. Heat insulation board; 16. Shaft; 17. L-shaped push rod; 171. Push block; 18. Guide rod; 19. Spring; 20. Transition block; 21. Pressure sensor; 22. Worm; 23. Worm gear; 24. Adjustment; 25. Anti-rotation pin. DETAILED DESCRIPTION

[0044] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0045] Example 1

[0046] from Figure 1-15 It can be seen that the continuous casting tundish nozzle quick-change device of this embodiment includes a mechanism body 1;

[0047] from Figure 1-2 It can be seen that a pushing device 4 is provided on one side of the mechanism body 1, the output end of the pushing device 4 is connected to a pushing arm 5, the rear end of the pushing arm 5 is provided with a guide plate 6, the front end of the pushing arm 5 is provided with a U-shaped opening groove 501, and a pin 7 is provided in the U-shaped opening groove 501;

[0048] from Figure 3 It can be seen that the guide plate 6 is provided with a straight line guide groove 1 601, an oblique line guide groove 2 602 and a straight line guide groove 3 603;

[0049] from Figure 1 、 Figure 4 、 Figure 12-15 It can be seen that a blind plate 8 is provided on the inlet side of the mechanism body 1, a blind plate hook 801 is provided at the rear end of the blind plate 8, and groove 1 802, an upwardly inclined opening groove 803, groove 2 804 and groove 3 805 are symmetrically provided on both sides of the front end of the blind plate 8.

[0050] The inlet side of the mechanism body 1 is also provided with a front pin 1001 and a rear pin 1002. The front pin 1001 and the rear pin 1002 are arranged in two groups at intervals and are respectively located on both sides of the blind plate 8;

[0051] A groove is provided in the center of the mechanism body 1 , in which an upper water port 14 is placed. A lower water port 13 is provided at the bottom of the mechanism body 1 , and the lower water port 13 includes an original lower water port 13b and a new lower water port 13a.

[0052] A cover plate 2 is provided at the upper end of the mechanism body 1 , and an inclined groove is provided on the bottom side of the cover plate 2 , in which an inclined wedge 3 is inserted. The inclined wedge 3 is inserted into the inclined groove on the bottom side of the cover plate 2 to fix the water inlet 14 .

[0053] A tightening device 9 is provided on the inlet side of the mechanism body 1 , and the tightening device 9 includes a tightening spring 901 and a push rod 902 .

[0054] Example 2

[0055] from Figure 5-8 It can be seen that the method of the quick-change device of the continuous casting tundish nozzle of this embodiment is as follows: Figure 5 It can be seen that: in the initial state;

[0056] The push arm 5 is located at the straight section guide groove 1 601 of the guide plate 6. One end of the blind plate 8 is hung on the pin 7 at the front end of the push arm 5 through the blind plate hook 801. The other end of the blind plate 8 is hung on the front pin 1001 through the groove 2 804 on both sides. Under the action of the tightening spring 901, the push rod 902 tightens the blind plate 8 to maintain stability; the original water outlet 13b is in the working position and the casting operation is normal.

[0057] from Figure 6-7 It can be seen that during the nozzle quick change process:

[0058] The new drain port 13a is placed at the entrance preparation position of the mechanism body 1, and its upper surface contacts the bottom of the blind plate 8, as shown in FIG. Figure 6 As shown;

[0059] The push arm 5 first moves forward along the straight section guide groove 1 601 of the guide plate 6, and the pin 7 on the push arm 5 pushes the blind plate hook 801 to drive the blind plate 8 to move forward;

[0060] Since the upper surface of the new drain port 13a supports the bottom of the blind plate 8, the blind plate 8 will continue to move forward linearly until the groove 3 805 is hung on the rear pin 1002 and the groove 1 802 is hung on the front pin 1001; at this time, the push arm 5 moves downward along the oblique guide groove 2 602, and the pin 7 is separated from the blind plate hook 801;

[0061] Subsequently, the push arm 5 moves forward linearly along the straight section guide groove 3 603, pushing the new drain port 13a at the preparation position out of the original drain port 13b and into the working position. Figure 7 As shown;

[0062] After the nozzle is replaced, the push arm 5 moves backward along the straight section guide groove 3 603, then moves upward along the guide groove 2 602, and the blind plate hook 801 is re-hung on the pin 7. Finally, the push arm 5 moves backward along the straight section guide groove 1 601, and the pin 7 pulls the blind plate hook 801 to drive the blind plate 8 back to the initial state during normal casting operation.

[0063] from Figure 8 It can be seen that when the device is in normal casting operation, if an emergency occurs and the nozzle needs to be closed, or when the casting operation is completed, the process of closing the nozzle with the blind plate 8 is as follows:

[0064] The push arm 5 first moves forward linearly along the straight section guide groove 1 601 of the guide plate 6. The pin 7 on the push arm 5 pushes the blind plate hook 801 to drive the blind plate 8 to move forward. When the support point of the front pin 1001 and the blind plate 8 changes from the groove 1 802 to the intersection of the obliquely upward open groove 803, since the bottom of the blind plate 8 is not supported by the water outlet to be replaced, under the action of the blind plate 8's own gravity, the front end of the blind plate 8 slides obliquely downward along the open groove 803 along the front pin 1001, and finally separates from the front pin 1001 and slides into the entrance preparation position of the mechanism body 1.

[0065] During the downward oblique movement of the push arm 5 along the oblique guide groove 2 602, the blind plate hook 801 at the rear end of the blind plate 8 also slides into the entrance preparation position of the mechanism body 1 along with the pin 7; at this point, the blind plate 8 slides into the entrance preparation position of the mechanism body 1 as a whole, and then the push arm 5 moves forward linearly along the straight guide groove 3 603, pushing the blind plate 8 at the preparation position out of the original water outlet 13b into the working position to close the water outlet and cut off the steel flow. Figure 8 As shown;

[0066] In this position, the pin 7 is located in the gap at the lower end of the blind plate hook 801 and is disengaged from the blind plate hook 801;

[0067] The push arm 5 is retracted backwards, along the straight segment guide groove 3 603 , the oblique segment guide groove 2 602 and finally enters the straight segment guide groove 1 601 to return to the initial position.

[0068] To sum up, during the normal casting operation, the device always hangs the blind plate 8 on the mechanism body 1 to achieve automatic standby, and there is no need to manually take and place the blind plate 8. When the sprue is quickly changed, the pushing device 4 drives the pushing arm 5 to push the new downspout 13a to be replaced into the working position, and then automatically returns to the initial standby state of the blind plate 8. During this process, if an emergency situation such as steel leakage between plates or loss of control of the stopper rod occurs, the pushing device 4 can be started again to push the blind plate 8 in to cut off the steel flow, thereby ensuring safety during the sprue quick change process. Therefore, the device can ensure that the steel flow can be cut off under any circumstances, thereby ensuring production safety.

[0069] Example 3

[0070] from Figure 2 、 Figure 16-17 It can be seen that the lower nozzle pressing mechanism of the continuous casting tundish nozzle quick-change device of this embodiment includes a mechanism body 1;

[0071] Pressure adjusting devices are provided on both sides of the lower part of the mechanism body 1, and the pressure adjusting devices include a spring box 11 and a pressure adjusting seat 12;

[0072] A spring 19 is provided inside the spring box 11. A transition block 20 is provided at one end of the spring 19. A pressure sensor 21 is provided on one side of the transition block 20. The transition block 20 transmits the pressure of the spring 19 to the pressure sensor 21 for reading.

[0073] The other end of the spring 19 is provided with a guide rod 18, and the front end of the guide rod 18 is provided with an L-shaped push rod 17;

[0074] A shaft 16 is provided in the spring box 11, and an L-shaped ejector rod 17 rotates relative to the shaft 16;

[0075] from Figure 9 It can be seen that the front end of the L-shaped push rod 17 is provided with a push block 171, which supports the lower sliding surface of the drain port 13;

[0076] The pressure of the spring 19 is transmitted to the drain port 13 through the guide rod 18 , the L-shaped ejector rod 17 , and the ejector block 171 , so that the upper surface of the drain port 13 and the lower surface of the upper port 14 are kept in close contact.

[0077] A heat insulation board 15 is provided at the bottom of the spring box 11; a plurality of sets of L-shaped push rods 17 are provided at one end of the spring box 11 near the drain 13;

[0078] from Figure 9 It can be seen that the upper surface of the ejector block 171 is designed with a straight middle portion and arc-shaped bevel transitions on both sides. In this way, the water outlet 13 slides smoothly and reliably from the working position of the mechanism body 1 to the working position of normal casting, or is ejected from the working position of normal casting.

[0079] A pressure adjustment seat 12 is provided on the side of the spring box 11 away from the drain port 13. A worm gear 23 is provided in the pressure adjustment seat 12. The outer ring of the worm gear 23 is meshed with the worm 22. The outer ring of the worm gear 23 is threadedly matched with the adjustment rod 24. An anti-rotation pin 25 is inserted into the rod of the adjustment rod 24.

[0080] The adjustment method is as follows: the worm 22 rotates to drive the worm wheel 23 to rotate, and the anti-rotation pin 25 prevents the adjustment rod 24, which is threadedly engaged with the worm wheel 23, from rotating with the worm wheel 23, but moves linearly toward the center of the mechanism body 1;

[0081] The tightening force of the adjusting rod 24 is transmitted to the spring 19 through the pressure sensor 21 and the transition block 20, causing the compression of the spring 19 to gradually increase, and the pressure also gradually increases. When the pressure value transmitted by the pressure sensor 21 reaches the designed working pressure of the spring 19, the adjustment stops;

[0082] The worm gear drive adjustment method is adopted to make the compression amount of the spring 19 change slightly and controllable, and the pressure adjustment accuracy is higher.

[0083] During normal casting operations, this device can set a pressure alarm safety value. When the pressure sensor 21 detects that the pressure value of the spring 19 drops below the pressure alarm safety value, it provides an alarm indication to remind the operator to take corresponding measures in time to prevent air absorption between plates and oxidation penetration of steel during casting operations under low spring pressure.

[0084] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A nozzle clamping mechanism for a continuous casting tundish nozzle quick-change device, comprising a mechanism body (1), characterized in that: Both sides of the lower part of the mechanism body (1) are provided with pressure adjusting devices, which include a spring box (11) and a pressure adjusting seat (12); The spring box (11) is provided with a spring (19) inside, a transition block (20) is provided at one end of the spring (19), and a pressure sensor (21) is provided on one side of the transition block (20); the transition block (20) transmits the pressure of the spring (19) to the pressure sensor (21) for transmission and reading; The other end of the spring (19) is provided with a guide rod (18), and the front end of the guide rod (18) is provided with an L-shaped push rod (17); A shaft (16) is provided in the spring box (11), and an L-shaped push rod (17) rotates relative to the shaft (16); The front end of the L-shaped push rod (17) is provided with a push block (171), and the push block (171) supports the lower sliding surface of the drain port (13); The pressure of the spring (19) is transmitted to the water outlet (13) through the guide rod (18), the L-shaped push rod (17) and the top block (171), so that the upper surface of the water outlet (13) and the lower surface of the water outlet (14) are kept in close contact.

2. The lower nozzle pressing mechanism of the continuous casting tundish nozzle quick-change device according to claim 1, characterized in that: A groove is provided in the center of the mechanism body (1), an upper water inlet (14) is placed in the groove, and a lower water inlet (13) is provided at the lower part of the mechanism body (1).

3. The lower nozzle clamping mechanism of the continuous casting tundish nozzle quick-change device according to claim 2, characterized in that: The upper end of the mechanism body (1) is provided with a cover plate (2), the bottom side of the cover plate (2) is provided with an inclined groove, an inclined wedge (3) is inserted into the inclined groove, and the inclined wedge (3) is inserted into the inclined groove on the bottom side of the cover plate (2) to fix the water inlet (14).

4. The lower nozzle clamping mechanism of the continuous casting tundish nozzle quick-change device according to claim 1, characterized in that: The bottom of the spring box (11) is provided with a heat insulation board (15); one end of the spring box (11) adjacent to the water outlet (13) is provided with multiple groups of L-shaped push rods (17).

5. The lower nozzle pressing mechanism of the continuous casting tundish nozzle quick-change device according to claim 1, characterized in that: The upper surface of the top block (171) is designed to be straight in the middle and transitional with arc-shaped inclined surfaces on both sides.

6. The lower nozzle pressing mechanism of the continuous casting tundish nozzle quick change device according to claim 1, characterized in that: A pressure adjustment seat (12) is provided on the side of the spring box (11) away from the water outlet (13), a worm gear (23) is provided in the pressure adjustment seat (12), the outer ring of the worm gear (23) is meshed with the worm (22), the outer ring of the worm gear (23) is threadedly matched with the adjustment rod (24), and an anti-rotation pin (25) is inserted on the rod body of the adjustment rod (24).

7. The lower nozzle pressing mechanism of the continuous casting tundish nozzle quick-change device according to claim 6, characterized in that: The rotating worm (22) drives the worm wheel (23) to rotate, and the anti-rotation pin (25) prevents the adjusting rod (24) that is threadedly engaged with the worm wheel (23) from rotating along with the worm wheel (23), but instead makes a linear motion toward the center of the mechanism body (1).

8. The lower nozzle pressing mechanism of the continuous casting tundish nozzle quick-change device according to claim 6, characterized in that: The pressing force of the adjusting rod (24) is transmitted to the spring (19) through the pressure sensor (21) and the transition block (20), so that the compression amount of the spring (19) gradually increases and the pressure also gradually increases. When the pressure value transmitted by the pressure sensor (21) reaches the designed working pressure of the spring (19), the adjustment stops.

9. The lower nozzle pressing mechanism of the continuous casting tundish nozzle quick-change device according to claim 6, characterized in that: During normal casting operation, the device can set a pressure alarm safety value, and provide an alarm indication when the pressure sensor (21) detects that the pressure value of the spring (19) drops below the pressure alarm safety value.

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