Automatic centering device for dummy bar

Abstract

The utility model discloses an automatic centering device for a dummy bar, which is characterized by comprising a base, a support is arranged on the base, an inverted L-shaped thrust arm is hinged on the support, and a thrust plate is arranged at the front end of the thrust arm; the two ends of the hydraulic cylinder are hinged to the base and the thrust arm respectively; the device further comprises a fixing plate connected with the support, and two sets of proximity switches matched with the thrust arms are arranged on the fixing plate. The dummy bar centering device is simple in structure, automatic centering of the dummy bar is achieved through the hydraulic cylinder and the proximity switch, equipment damage accidents caused by inaccurate positioning of a traditional dummy bar centering device are avoided, unnecessary manual maintenance workload is reduced, work efficiency is improved, and stable and continuous production of a continuous casting machine is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of continuous casting equipment, and in particular relates to an automatic centering device for a dummy bar. Background Art

[0002] During the operation of the continuous casting machine, the centering operation of the dummy bar is crucial to ensure the continuity and stability of the production process. However, the traditional centering method usually relies on manual operation or continuous adjustment, and has problems such as low centering accuracy, complex operation, and low efficiency. It may even cause equipment damage accidents due to inaccurate centering, resulting in production stagnation. Therefore, it is necessary to develop a new type of automatic centering device for the dummy bar to improve the centering accuracy and efficiency and reduce production costs. Utility Model Content

[0003] The utility model aims to provide a dummy bar automatic centering device to solve the problems in the prior art.

[0004] The utility model is realized through the following technical scheme: an automatic centering device for a dummy rod, characterized in that it includes a base, a bracket is arranged on the base, an inverted L-shaped thrust arm is hinged on the bracket, and a thrust plate is arranged at the front end of the thrust arm; it also includes a hydraulic cylinder, the two ends of the hydraulic cylinder are respectively hinged on the base and the thrust arm; it also includes a fixed plate connected to the bracket, and two groups of proximity switches cooperating with the thrust arm are arranged on the fixed plate.

[0005] Further: the thrust arm and the bracket are connected by a pin shaft; the hydraulic cylinder is connected to the trunnion welded on the base;

[0006] Further: the base is fixed to the ground by multiple sets of bolts and washers.

[0007] Furthermore: it also includes a thrust plate, which is connected to the front end of the thrust arm through screws.

[0008] Furthermore: a shaft sleeve is provided outside the pin shaft, a cylindrical oil cup is embedded inside the pin shaft, the end is sealed by a screw plug, and multiple lubricating oil passages connecting the oil cup and the inside of the shaft sleeve are provided between the pin shaft surface and the oil cup.

[0009] Furthermore: it also includes a gasket group, which is arranged at the connection between the thrust plate and the thrust arm.

[0010] Furthermore: it also includes a protection plate, which is welded and fixed on the front end of the thrust arm.

[0011] Further: the proximity switch is fixed on the bracket through a fixing plate.

[0012] Further: there are six groups of automatic centering devices, which are respectively arranged on both sides of the roller table.

[0013] The beneficial effects of the utility model are as follows: the structure of the utility model is not only simple in structure, but also realizes automatic centering of the dummy rod through the hydraulic cylinder and the proximity switch, thus avoiding equipment damage accidents caused by inaccurate positioning of the traditional dummy rod centering device, reducing unnecessary manual maintenance workload, improving work efficiency, and realizing stable and continuous production of the continuous casting machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the front view of the device of the utility model;

[0015] Figure 2 This is a top view of the device of the utility model;

[0016] Figure 3 This is a working schematic diagram of the device of the utility model;

[0017] Figure 4 for Figure 1 Middle BB cross-section.

[0018] Among them, 1-thrust plate, 2-gasket group, 3-thrust arm, 4-hydraulic cylinder, 5-ear shaft, 6-axis end baffle, 7-base, 8-bolt, 9-gasket, 10-bracket, 11-fixed plate, 12-protection plate, 13-proximity switch, 14-oil cup, 15-pin shaft, 16-sleeve, 17-dart rod. DETAILED DESCRIPTION

[0019] like Figure 1-4 The utility model is shown as a device for automatically centering a dummy rod, which includes a base 7 fixed to the ground, a group of brackets 10 welded on the base 7, the brackets 10 have two pieces, a pin shaft 15 is arranged in the middle, an inverted L-shaped (i.e., "7"-shaped) thrust arm 3 is hinged on the pin shaft 15 of the bracket 10, and a thrust plate 1 matched with the dummy rod is arranged at the front end of the crossbeam of the thrust arm 3; it also includes a hydraulic cylinder 4, the two ends of the hydraulic cylinder 4 are respectively hinged on the base 7 and the middle of the vertical part of the thrust arm 3, and are used to control the movement of the thrust arm to generate thrust; it also includes a fixed plate 11 connected to the bracket 10, and two groups of proximity switches 13 matched with the starting and ending positions of the thrust arm 3 are arranged on the fixed plate 11.

[0020] Preferably, the thrust arm 3 and the bracket 10 are connected via a pin 15; the hydraulic cylinder 4 is connected to the trunnion 5 welded on the base 7. Specifically, the bottom of the hydraulic cylinder 4 is hinged to the trunnion 5 via a pin, and the trunnion 5 is welded on the base 7.

[0021] Preferably, the base 7 is fixed on the ground by multiple groups of bolts 8, and washers 9 are also arranged on the bolts.

[0022] Preferably, the thrust plate 1 is connected to the front end of the thrust arm 3 by means of screws, and a gasket set 2 is provided between the thrust plate 1 and the thrust arm 3 .

[0023] Preferably: a shaft sleeve 16 is provided on the outside of the pin shaft 15, a cylindrical oil cup 14 is embedded in the inside of the pin shaft 15, the end of which is sealed by a screw plug, and a plurality of lubricating oil passages connecting the oil cup 14 and the inside of the shaft sleeve 16 are provided between the surface of the pin shaft 15 and the oil cup 14; thereby ensuring that the connection between the thrust arm 3 and the bracket 10 is fully lubricated.

[0024] Preferably, a protection plate 12 is further included, and the protection plate 12 is welded and fixed to the front end of the thrust arm 3, that is, the side of the vertical part of the thrust arm 3 facing the dummy rod.

[0025] Preferably, the proximity switch 13 is fixed on the bracket 10 through the fixing plate 11, corresponding to the maximum and minimum extension positions of the thrust arm, respectively. This structure can be used to monitor the displacement position of the thrust arm 3 and to indicate that the action of the hydraulic cylinder 4 stops.

[0026] Preferably, there are six groups of automatic centering devices, which are respectively arranged on both sides of the roller table and are symmetrical in pairs.

[0027] The present invention is further described below by using examples in combination with the use process. Example 1

[0028] A dummy bar automatic centering device is mainly used in the process of conveying the dummy bar upwards, and can realize accurate automatic centering positioning of the dummy bar and effectively improve work efficiency. It includes a thrust plate 1, a gasket group 2, a thrust arm 3, a hydraulic cylinder 4, a trunnion 5, a shaft end baffle 6, a base 7, a bolt 8, a gasket 9, a bracket 10, a fixing plate 11, a protection plate 12, a proximity switch 13, an oil cup 14, a pin 15, a shaft sleeve 16, and a dummy bar 17. The lower end of the thrust arm 3 is connected to the bracket 10 welded on the base 7 through a pin shaft 15. In order to ensure that the connection between the thrust arm 3 and the bracket 10 is fully lubricated, a shaft sleeve 16 is provided on the outside of the pin shaft 15, and an oil cup 14 is provided on the end thereof; in order to avoid displacement deviation of the automatic centering device of the dummy rod during operation, the base 7 is fixed to the ground through multiple sets of bolts 8 and gaskets 9; the middle part of the thrust arm 3 is hinged to the output end of the hydraulic cylinder 4 through a pin shaft, so that the thrust arm 3 can produce forward and backward displacement with the reciprocating extension and contraction of the hydraulic cylinder 4; in order to prevent the pin shaft from producing axial displacement and protect the pin shaft from excessive dust pollution, a shaft end baffle 6 is provided at the end of the pin shaft, and is fixed to the thrust arm 3 through multiple sets of bolts; the other side of the hydraulic cylinder 4 The end is hinged with the ear shaft 5 through a pin shaft, and the bottom of the ear shaft 5 is welded on the base 7. In order to prevent the pin shaft from axial displacement and protect the pin shaft from excessive dust pollution, the end of the pin shaft is provided with an axis end baffle 6, and is fixed to the ear shaft 5 by multiple sets of bolts; the thrust plate 1 is connected to the front end of the thrust arm 3 by screws, and a gasket group 2 is provided in the middle; in order to prevent the connection of the thrust arm 3 from being affected by the hot working environment of the continuous casting billet, a protective plate 12 is provided on the outside for protection; in order to accurately and automatically position the thrust plate 1 and the thrust arm 3, two groups of proximity switches 13 are provided, which are respectively fixed on the bracket 10 through the fixing plate 11. When the thrust arm 3 is within the sensing range of the proximity switch 13, the hydraulic cylinder stops extending and retracting. In order to effectively center the dummy rod 17 with a certain length, a total of 6 groups of automatic centering devices are provided on both sides of the roller table.

[0029] When the continuous casting machine is ready for production, the dummy rod 17 needs to be gradually transported to the upper end of the continuous casting machine by the roller table. Figure 4 When in the position shown, the roller is controlled to stop moving, and then 6 groups of hydraulic cylinders 4 are started simultaneously. The thrust arm 3 and the thrust plate 1 are displaced forward as the hydraulic cylinder 4 extends. When the thrust arm 3 is within the sensing range of the front proximity switch 13, the hydraulic cylinder 4 stops working. At this time, the thrust plates 1 of the centering devices on both sides of the roller are in contact with the dummy rod 17, and the center line of the dummy rod 17 and the center line of the continuous casting machine are coincident, achieving precise centering.

[0030] After the automatic centering of the ingot rod is realized, the system controls and starts the retraction of 6 groups of hydraulic cylinders 4. The thrust arm 3 and the thrust plate 1 are displaced backward with the retraction of the hydraulic cylinder 4. When the thrust arm 3 is within the sensing range of the rear end proximity switch 13, the hydraulic cylinder 4 stops working again and is in a fully retracted state, and the automatic centering device of the ingot rod is in an initial state. The rear end proximity switch 13 can not only realize the precise retraction positioning of the thrust arm 3, but also prevent the influence caused by the impact of the retraction process of the hydraulic cylinder 4.

[0031] The structure of the utility model can not only realize the hydraulic cylinder controlling the thrust arm and the thrust plate to check and align the ingot rod, but also realize the automatic and accurate positioning of the centering device through the proximity switch, thereby avoiding the equipment damage accidents caused by the inaccurate positioning of the traditional ingot rod centering device, reducing unnecessary maintenance workload, reducing manual workload, improving work efficiency, and realizing industrial automation. In this solution, the base is fixed to the ground, which improves the overall stability and thus improves the centering accuracy. By adopting the L-shaped thrust arm, a larger centering distance can be achieved with a smaller displacement of the hydraulic cylinder, reducing the volume of the equipment and improving the centering efficiency.

Claims

1. A dummy bar automatic centering device, characterized in that: It comprises a base (7), a bracket (10) is arranged on the base (7), an inverted L-shaped thrust arm (3) is hinged on the bracket (10), and a thrust plate (1) is arranged at the front end of the thrust arm (3); It also includes a hydraulic cylinder (4), the two ends of which are respectively hinged on the base (7) and the thrust arm (3); It also includes a fixing plate (11) connected to the bracket (10), and two groups of proximity switches (13) matched with the thrust arms (3) are arranged on the fixing plate (11).

2. The automatic centering device for a dummy bar according to claim 1, characterized in that: The thrust arm (3) and the bracket (10) are connected via a pin (15); The hydraulic cylinder (4) is connected to a trunnion (5) welded to a base (7).

3. The automatic centering device for a dummy bar according to claim 1, characterized in that: The base (7) is fixed to the ground via a plurality of sets of bolts (8) and washers (9).

4. The automatic centering device for a dummy bar according to claim 1, characterized in that: It also includes a thrust plate (1), which is connected to the front end of the thrust arm (3) via screws.

5. The automatic centering device for a dummy bar according to claim 1, characterized in that: A shaft sleeve (16) is arranged outside the pin shaft (15), an oil cup (14) is arranged on the pin shaft (15), and a lubricating oil passage communicating the oil cup (14) and the inside of the shaft sleeve (16) is also arranged inside the pin shaft (15).

6. The automatic centering device for a dummy bar according to claim 4, characterized in that: It also includes a gasket group (2), which is arranged at the connection between the thrust plate (1) and the thrust arm (3).

7. The automatic centering device for a dummy bar according to claim 1, characterized in that: It also includes a protection plate (12), which is welded and fixed to the front end of the thrust arm (3).

8. The automatic centering device for a dummy bar according to claim 1, characterized in that: The proximity switch (13) is fixed on the bracket (10) via a fixing plate (11).

9. The automatic centering device for a dummy bar according to claim 1, characterized in that: There are six groups of automatic centering devices, which are respectively arranged on both sides of the roller table.

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