Rolling mill screw-down limiting device

Abstract

The utility model provides a rolling mill screw-down limiting device, which comprises a first protective cover, a second protective cover, a screw-down limiting device and a screw-down limiting device, the first protective cover is fixedly connected with a rolling mill frame, and the screw-down limiting device is positioned on the inner side of the first protective cover; the guide pipe is fixedly mounted on the upper cover plate of the first protective cover, and the guide pipe corresponds to the pressing screw in position; the sliding rod is movably connected to the inner side of the guide pipe; and the proximity sensor is arranged corresponding to the upper end of the sliding rod. The limiting device has the advantages that compared with a traditional limiting device which is directly provided with the proximity sensor on the first protective cover, the proximity sensor does not directly sense the screw-down screw but senses the sliding rod, paint of the screw-down screw can be effectively prevented from polluting the proximity sensor, the service life of the proximity sensor is prolonged, and the safety of the limiting device is improved. And the safety in the use process is also ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rolling mill technical field especially is related to a rolling mill screw limiting device. BACKGROUND

[0002] The rough rolling reversible rolling mill screw-down device is an important component of the rolling mill, which drives the screw-down screw up and down through the screw-down motor and the screw-down reducer (worm pair), and the screw-down nut is installed on the rack. Since the position of the screw-down screw is at the top of the rolling mill, the position of the screw-down screw is detected by the proximity sensor at the top of the screw-down screw, and the action of the reducer is stopped in time. In the current rolling mill screw-down screw limiting device, the proximity sensor directly detects the screw-down screw on the protective cover, which has the following problems in use: first, there is a large amount of oil and gas in the protective cover, and the temperature is relatively high, which not only does not affect the service life of the proximity sensor, but also may cause the proximity sensor to be insensitive, resulting in the inability to detect the screw-down screw and the existence of safety hazards; second, the position of the proximity sensor cannot be adjusted, which leads to the inability to be applicable to different position limiting, resulting in the limitation of its application range. SUMMARY

[0003] Therefore, the utility model aims at providing a rolling mill screw-down screw limiting device to solve at least one of the above technical problems.

[0004] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0005] A rolling mill screw-down screw limiting device, comprising:

[0006] A first protective cover is fixedly connected with the rolling mill frame, and the screw-down screw is located inside the first protective cover.

[0007] A guide pipe is fixedly installed on the upper cover plate of the first protective cover, and the guide pipe corresponds to the position of the screw-down screw.

[0008] A sliding rod is movably connected to the inside of the guide pipe.

[0009] A proximity sensor is arranged corresponding to the upper end of the sliding rod.

[0010] Further, a second protective cover is fixedly arranged on the cover plate of the first protective cover, and the upper end of the sliding rod and the proximity sensor are located inside the second protective cover.

[0011] Further, the outer side of the upper end of the guide pipe is fixedly provided with an annular limiting boss, the cover plate is fixedly provided with a mounting seat, a mounting hole is mounted on the mounting seat, a mounting groove corresponding to the mounting hole is opened on the mounting seat, the diameter of the mounting groove matches the diameter of the annular boss, the annular limiting boss is located on the inner side of the mounting groove, and the guide pipe penetrates through the mounting hole and the cover plate is located on the inner side of the first protective cover.

[0012] The lower end of the sliding rod penetrates through the guide pipe and is located on the inner side of the first protective cover.

[0013] Further, the sliding rod is a circular rod.

[0014] A limiting plane is opened on the side wall of the sliding rod, a limiting hole corresponding to the limiting plane is opened on the guide pipe, a first threaded hole corresponding to the limiting hole is opened on the mounting seat, a limiting bolt is screw-connected in the first threaded hole, and the limiting bolt penetrates through the limiting hole and protrudes from the inner side wall of the guide pipe.

[0015] Further, an adjusting threaded hole is opened at the bottom end of the sliding rod, an adjusting rod is screw-connected in the adjusting threaded hole, and the lower end surface of the adjusting rod is a spherical surface.

[0016] Further, a baffle is fixedly arranged on the adjusting rod, a compression spring is arranged between the baffles and the guide pipe, and the compression spring is mounted on the outer side of the sliding rod.

[0017] Further, a sliding pipe is arranged between the compression spring and the baffle, the inner diameter of the sliding pipe matches the diameter of the sliding rod, and the sliding pipe is mounted on the outer side of the sliding rod.

[0018] Further, an anti-skid structure is arranged on the end surface of the sliding pipe close to the baffle.

[0019] Further, an internally-threaded pipe corresponding to the limiting plane is fixedly arranged on the side wall of the sliding pipe, the limiting bolt is screw-connected in the internally-threaded pipe, and the limiting bolt protrudes from the inner side wall of the sliding pipe.

[0020] A positioning groove is opened on the end surface of the sliding pipe close to the baffle, the number of the positioning grooves is multiple, and the multiple positioning grooves are uniformly arranged in the circumferential direction of the sliding pipe.

[0021] A positioning column corresponding to the positioning groove is fixedly arranged on the baffle, and the positioning column is located on the inner side of the positioning groove.

[0022] Further, a sensing plane corresponding to the proximity sensor is opened on the side wall of the upper end of the sliding rod.

[0023] Compared with the prior art, the rolling mill screw limiting device has the following beneficial effects:

[0024] The utility model relates to a kind of mill screwdown screw limiting device, compared with the limiting device directly on the first protective cover installation proximity sensor of traditional, proximity sensor is not directly inductive screwdown screw, but inductive slide rod, can effectively prevent the paint pollution of proximity sensor of screwdown screw, not only improve the service life of proximity sensor, and also guarantee the security in use process. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings that form part of the utility model are used to provide further understanding to the utility model, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute undue limitation to the utility model. In the drawings:

[0026] Figure 1 The limiting device usage state section structure schematic view of the utility model embodiment described is shown in the figure;

[0027] Figure 2 The limiting device usage state section structure schematic view of the utility model embodiment described is shown in the figure; Figure 1 The structure schematic view of the utility model embodiment described in A is shown in the figure;

[0028] Figure 3 The structure schematic view of the utility model embodiment described in B is shown in the figure; Figure 2 The structure schematic view of the utility model embodiment described in B is shown in the figure;

[0029] Figure 4 The device solid structure schematic view of the utility model embodiment described is shown in the figure;

[0030] Figure 5 The slide rod solid structure schematic view of the utility model embodiment described is shown in the figure;

[0031] Figure 6 The guide pipe solid structure schematic view of the utility model embodiment described is shown in the figure;

[0032] Figure 7 The adjusting rod solid structure schematic view of the utility model embodiment described is shown in the figure;

[0033] Figure 8 The slide pipe solid structure schematic view of the utility model embodiment described is shown in the figure;

[0034] Figure 9 The mounting seat solid structure schematic view of the utility model embodiment described is shown in the figure.

[0035] Mark explanation:

[0036] 1. Proximity sensor; 2. Second protective cover; 3. Slide rod; 4. Press-down screw; 5. First protective cover; 6. Cover plate; 7. Mounting seat; 8. Limit bolt; 9. Guide tube; 10. Compression spring; 11. Slide tube; 12. Adjustment rod; 301. Limit plane; 302. Adjustment threaded hole; 303. Sensing plane; 701. Mounting slot; 702. Mounting hole; 703. First threaded hole; 901. Annular limit boss; 902. Limit hole; 1101. Internally threaded tube; 1102. Positioning slot; 1201. Baffle; 1202. Positioning column. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0041] like Figures 1 to 9 As shown, a rolling mill pressing screw 4 limiting device includes:

[0042] The first protective cover 5 is fixedly connected to the rolling mill frame, and the pressing screw 4 is located inside the first protective cover 5;

[0043] A guide pipe 9 is fixedly installed on the upper cover plate 6 of the first protective cover 5, and the guide pipe 9 corresponds to the position of the pressing screw 4;

[0044] A slide rod 3 is movably connected to the inner side of the guide pipe 9; and a proximity sensor 1 is arranged corresponding to the upper end of the slide rod 3.

[0045] The proximity sensor 1 adopts, but is not limited to, an existing Hall sensor, and the sensor is electrically connected to a PLC controller, and the PLC controller is electrically connected to a driver for driving the pressing screw 4 to move up and down. When the proximity sensor 1 receives a signal of the slide rod 3, the PLC controller controls the driver to stop according to the signal. The above is prior art, and the specific connection relationship will not be described here.

[0046] A second protective cover 2 is fixedly arranged on the cover plate 6 of the first protective cover 5, and the upper end of the slide rod 3 and the proximity sensor 1 are located inside the second protective cover 2. The arrangement of the second protective cover 2 can prevent dust from affecting the slide rod 3 and the proximity sensor 1, and improve the sensing accuracy of the proximity sensor 1.

[0047] An annular limiting boss 901 is fixedly arranged on the outer side of the upper end of the guide pipe 9, a mounting seat 7 is fixedly arranged on the cover plate 6, a mounting hole 702 is arranged on the mounting seat 7, a mounting groove 701 corresponding to the mounting hole 702 is arranged on the mounting seat 7, the diameter of the mounting groove 701 matches the diameter of the annular boss, the annular limiting boss 901 is located inside the mounting groove 701, the guide pipe 9 penetrates through the mounting hole 702, and the cover plate 6 is located inside the first protective cover 5; the lower end of the slide rod 3 penetrates through the guide pipe 9 and is located inside the first protective cover 5.

[0048] The slide rod 3 is a circular rod; a limiting plane 301 is arranged on the side wall of the slide rod 3, a limiting hole 902 corresponding to the limiting plane 301 is arranged on the guide pipe 9, a first threaded hole 703 corresponding to the limiting hole 902 is arranged on the mounting seat 7, a limiting bolt 8 is threadedly connected in the first threaded hole 703, the limiting bolt 8 penetrates through the limiting hole 902 and protrudes from the inner side wall of the guide pipe 9, and the limiting bolt 8 prevents the slide rod 3 from rotating relative to the guide pipe 9, thereby improving the stability during use.

[0049] An adjusting threaded hole 302 is arranged at the bottom end of the slide rod 3, and an adjusting rod 12 is threadedly connected in the adjusting threaded hole 302. The lower end surface of the adjusting rod 12 is a spherical surface. By rotating the adjusting rod 12, the limiting position of the pressing screw 4 can be adjusted, thereby improving the application range of the device.

[0050] A baffle 1201 is fixedly arranged on the adjusting rod 12, a compression spring 10 is arranged between the guide pipe 9 and the baffle 1201, the compression spring 10 is arranged on the outer side of the slide rod 3, and the compression spring 10 plays a resetting role on the slide rod 3.

[0051] A sliding pipe 11 is arranged between the compression spring 10 and the baffle 1201, the inner diameter of the sliding pipe 11 matches the diameter of the sliding rod 3, and the sliding pipe 11 is installed on the outer side of the sliding rod 3.

[0052] The sliding rod 3 is provided with a sensing plane 303 corresponding to the proximity sensor 1 on the upper end side wall, and the sensing plane 303 ensures the sensing accuracy of the proximity sensor 1.

[0053] In some embodiments, the end surface of the sliding pipe 11 near the baffle 1201 is provided with an anti-skid structure, which is an anti-skid pattern.

[0054] In other embodiments, an inner threaded pipe 1101 corresponding to the limiting plane 301 is fixed on the side wall of the sliding pipe 11, the inner threaded pipe 1101 is internally threaded connected with a limiting bolt 8, the limiting bolt 8 protrudes from the inner side wall of the sliding pipe 11; the end surface of the sliding pipe 11 near the baffle 1201 is provided with a plurality of positioning grooves 1102, the plurality of positioning grooves 1102 are uniformly arranged in the circumferential direction of the sliding pipe 11; the baffle 1201 is fixedly provided with a positioning column 1202 corresponding to the positioning groove 1102, the positioning column 1202 is located on the inner side of the positioning groove 1102, the limiting bolt 8 prevents the relative rotation between the sliding pipe 11 and the sliding rod 3, and the positioning column 1202 and the positioning groove 1102 can prevent the relative rotation between the adjusting rod 12 and the sliding rod 3, thereby improving the stability during use.

[0055] Working process:

[0056] When the pressing screw 4 moves upward and contacts the lower end of the adjusting rod 12, the sliding rod 3 is driven to move upward, in this process, the compression spring 10 is further compressed, when the proximity sensor 1 senses the sliding rod 3, a signal is sent to the PLC controller, the PLC controller closes the driver of the pressing screw 4, and the pressing screw 4 stops moving.

[0057] Compared with the traditional limiting device which directly installs the proximity sensor 1 on the first protective cover 5, by installing the proximity sensor 1 in the second protective cover 2, the proximity sensor 1 does not directly sense the pressing screw 4, but senses the sliding rod 3, which can effectively prevent the paint of the pressing screw 4 from polluting the proximity sensor, not only improving the service life of the proximity sensor 1, but also ensuring the safety during use.

[0058] And the limiting position can be adjusted by rotating the adjusting rod 12, which is convenient to operate.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. The modifications or replacements do not change the essence of the corresponding technical solutions, which should be included in the scope of the claims and the description of the present application.

[0060] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A roughing reversible mill screw limiting device, characterized in that, The utility model relates to a kind of safety device for rolling mill screwdown system, including: First protective cover (5), which is fixedly connected with the rolling mill frame, and the screwdown screw (4) is located inside the first protective cover (5); A guide pipe (9) is fixedly installed on the upper cover plate (6) of the first protective cover (5), and the guide pipe (9) corresponds to the position of the screwdown screw (4); A sliding rod (3) is movably connected to the inside of the guide pipe (9); A proximity sensor (1) is arranged corresponding to the upper end of the sliding rod (3).

2. The roughing reversible mill screw limiting device according to claim 1, characterized in that: A second protective cover (2) is fixedly arranged on the cover plate (6) of the first protective cover (5), and the upper end of the sliding rod (3) and the proximity sensor (1) are located inside the second protective cover (2).

3. The roughing reversible mill screw limiting device according to claim 2, characterized in that: An annular limiting boss (901) is fixedly arranged on the outside of the upper end of the guide pipe (9), a mounting seat (7) is fixedly arranged on the cover plate (6), a mounting hole (702) is arranged on the mounting seat (7), a mounting groove (701) corresponding to the mounting hole (702) is opened on the mounting seat (7), the diameter of the mounting groove (701) matches the diameter of the annular boss, the annular limiting boss (901) is located inside the mounting groove (701), and the guide pipe (9) penetrates the mounting hole (702) and the cover plate (6) is located inside the first protective cover (5). The lower end of the sliding rod (3) penetrates the guide pipe (9) and is located inside the first protective cover (5).

4. The roughing reversible mill screw limiting device according to claim 3, characterized in that: The sliding rod (3) is a circular rod. A limiting plane (301) is opened on the side wall of the sliding rod (3), a limiting hole (902) corresponding to the limiting plane (301) is opened on the guide pipe (9), a first threaded hole (703) corresponding to the limiting hole (902) is opened on the mounting seat (7), a limiting bolt (8) is threadedly connected in the first threaded hole (703), and the limiting bolt (8) penetrates the limiting hole (902) and protrudes from the inner side wall of the guide pipe (9).

5. The roughing reversible mill screw limiting device according to claim 1, characterized in that: An adjusting threaded hole (302) is opened at the bottom end of the sliding rod (3), an adjusting rod (12) is threadedly connected in the adjusting threaded hole (302), and the lower end surface of the adjusting rod (12) is a spherical surface.

6. The roughing reversible mill screw limiting device according to claim 5, characterized in that: A baffle (1201) is fixedly arranged on the adjusting rod (12), a compression spring (10) is arranged between the guide pipes (9), and the compression spring (10) is mounted on the outside of the sliding rod (3).

7. The roughing reversible mill screw limiting device according to claim 6, characterized in that: A sliding pipe (11) is arranged between the compression spring (10) and the baffle (1201), the inner diameter of the sliding pipe (11) matches the diameter of the sliding rod (3), and the sliding pipe (11) is mounted on the outside of the sliding rod (3).

8. The roughing reversible mill screw limiting device according to claim 7, characterized in that: An anti-skid structure is arranged on the end surface of the sliding pipe (11) close to the baffle (1201).

9. The roughing reversible mill screw limiting device according to claim 7, characterized in that: An internally threaded pipe (1101) corresponding to the limiting plane (301) is fixedly arranged on the side wall of the sliding pipe (11), a limiting bolt (8) is threadedly connected in the internally threaded pipe (1101), and the limiting bolt (8) protrudes from the inner side wall of the sliding pipe (11). The slide pipe (11) is provided with positioning grooves (1102) on the end face close to the baffle (1201), the number of the positioning grooves (1102) is multiple, and the multiple positioning grooves (1102) are uniformly arranged in the circumferential direction of the slide pipe (11); The baffle (1201) is fixedly provided with positioning columns (1202) corresponding to the positioning grooves (1102), and the positioning columns (1202) are located on the inner side of the positioning grooves (1102).

10. The roughing reversible mill screw limiting device according to claim 1, characterized in that: The slide rod (3) is provided with a sensing plane (303) corresponding to the proximity sensor (1) on the upper end side wall.

Images