Rolling mill screw-down limiting device

Abstract

The invention 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 third protective cover, the first protective cover is fixedly connected with a rolling mill frame, and a screw-down screw is located 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 beneficial effects that compared with a traditional limiting device which is directly provided with a proximity sensor on a 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 invention belongs to the technical field of rolling mills, and in particular relates to a rolling mill press screw limiting device. Background Art

[0002] The pressing device of the rough rolling reversible mill is an important part of the rolling mill. The pressing motor drives the pressing reducer (worm gear pair), drives the pressing screw to move up and down, and the pressing nut is installed on the frame. Since the pressing screw is located at the top of the rolling mill, the position of the pressing screw is detected by the proximity sensor at the top of the pressing screw, and the speed reducer action is stopped in time. In the current rolling mill pressing screw limit device, the proximity sensor is directly installed on the protective cover to detect the pressing screw. The following problems exist during use: First, there is a large amount of oil and gas in the protective cover and the temperature is 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 safety hazard of the pressing screw; second, the position of the proximity sensor cannot be adjusted, resulting in the inability to apply to different position limits, resulting in its scope of application being limited. Summary of the invention

[0003] In view of this, the present invention aims to provide a rolling mill press screw limiting device, in order to solve at least one of the above-mentioned technical problems.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A rolling mill screw limiter device, comprising:

[0006] A first protective cover, wherein the first protective cover is fixedly connected to the rolling mill frame, and the pressing screw is located inside the first protective cover;

[0007] A guide tube, the guide tube is fixedly mounted on the upper cover plate of the first protective cover, the guide tube corresponding to the position of the pressing screw;

[0008] A slide bar, the slide bar being movably connected to the inner side of the guide tube;

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

[0010] Furthermore, 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 both located on the inner side of the second protective cover.

[0011] Further, an annular limiting boss is fixedly provided on the outer side of the upper end of the guide tube, a mounting seat is fixedly provided on the cover plate, a mounting hole is provided on the mounting seat, a mounting groove corresponding to the mounting hole is provided 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, the guide tube passes 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 slide rod passes through the guide tube and is located inside the first protective cover.

[0013] Further, the sliding rod is a round rod;

[0014] A limiting plane is formed on the side wall of the slide rod, a limiting hole corresponding to the limiting plane is formed on the guide tube, a first threaded hole corresponding to the limiting hole is formed on the mounting seat, a limiting bolt is connected to the thread in the first threaded hole, and the limiting bolt passes through the limiting hole and protrudes out of the inner wall of the guide tube.

[0015] Furthermore, an adjusting threaded hole is formed at the bottom end of the slide rod, an adjusting rod is threadedly connected to the adjusting threaded hole, and the lower end surface of the adjusting rod is a spherical surface.

[0016] Furthermore, a baffle is fixedly provided on the adjusting rod, a compression spring is provided between the baffle guide tube, and the compression spring is installed on the outer side of the sliding rod.

[0017] Furthermore, a sliding tube is provided between the compression spring and the baffle, the inner diameter of the sliding tube matches the diameter of the sliding rod, and the sliding tube is installed on the outer side of the sliding rod.

[0018] Furthermore, an anti-slip structure is provided on the end surface of the sliding tube adjacent to the baffle.

[0019] Furthermore, an internally threaded tube corresponding to the limiting plane is fixedly arranged on the side wall of the sliding tube, and the internally threaded tube is internally threadedly connected to a limiting bolt, and the limiting bolt protrudes out of the inner side wall of the sliding tube;

[0020] The end surface of the slide tube adjacent to the baffle is provided with a positioning groove, the number of the positioning grooves is multiple, and the multiple positioning grooves are evenly arranged along the circumference of the slide tube;

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

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

[0023] Compared with the prior art, the rolling mill screw limiter device described in the present invention has the following beneficial effects:

[0024] Compared with the traditional limiting device which directly installs the proximity sensor on the first protective cover, the rolling mill screw-down limit device described in the present invention does not directly sense the screw-down limit, but senses the sliding rod, which can effectively prevent the paint of the screw-down limit from contaminating the proximity sensor, thereby not only improving the service life of the proximity sensor, but also ensuring the safety during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 This is a schematic cross-sectional structural diagram of the limiting device according to an embodiment of the present invention in a use state;

[0027] Figure 2 For the embodiment of the present invention Figure 1 Schematic diagram of the structure at A in the middle;

[0028] Figure 3 For the embodiment of the present invention Figure 2 Schematic diagram of the structure at B in the middle;

[0029] Figure 4 It is a schematic diagram of the three-dimensional structure of the device according to an embodiment of the present invention;

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the sliding rod according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the three-dimensional structure of the guide tube according to an embodiment of the present invention;

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the adjustment rod according to an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the three-dimensional structure of the sliding tube according to an embodiment of the present invention;

[0034] Fig. 9 It is a schematic diagram of the three-dimensional structure of the mounting base according to an embodiment of the present invention.

[0035] Description of reference numerals:

[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 groove; 702. Mounting hole; 703. First threaded hole; 901. Annular limit boss; 902. Limit hole; 1101. Internal threaded tube; 1102. Positioning groove; 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 in the embodiments may 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like 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 the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

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

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

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

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

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

[0045] The proximity sensor 1 adopts but is not limited to the existing Hall sensor. The sensor is electrically connected to the PLC controller, and the PLC controller is electrically connected to the driver. The driver is used to drive the pressing screw 4 to move up and down. When the proximity sensor 1 receives the signal of the slide bar 3, the PLC controller controls the driver to stop the action according to the signal. The above is the existing technology, and the specific connection relationship will not be repeated here.

[0046] The second protective cover 2 is fixed on the cover plate 6 of the first protective cover 5, and the upper end of the slide bar 3 and the proximity sensor 1 are both located inside the second protective cover 2. The second protective cover 2 can prevent dust from assisting the slide bar 3 and the proximity sensor 1 and improve the sensing accuracy of the proximity sensor 1.

[0047] An annular limiting boss 901 is fixedly provided on the outer side of the upper end of the guide tube 9, a mounting seat 7 is fixedly provided on the cover plate 6, a mounting hole 702 is provided 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 on the inner side of the mounting groove 701, the guide tube 9 passes through the mounting hole 702, the cover plate 6 is located on the inner side of the first protective cover 5; the lower end of the slide rod 3 passes through the guide tube 9 and is located on the inner side of the first protective cover 5.

[0048] The slide bar 3 is a round rod; a limiting plane 301 is opened on the side wall of the slide bar 3, a limiting hole 902 corresponding to the limiting plane 301 is opened on the guide tube 9, and a first threaded hole 703 corresponding to the limiting hole 902 is opened on the mounting seat 7. The first threaded hole 703 is internally threadedly connected to a limiting bolt 8, and the limiting bolt 8 passes through the limiting hole 902 and protrudes from the inner wall of the guide tube 9. The limiting bolt 8 prevents the slide bar 3 and the guide tube 9 from rotating relative to each other, thereby improving the stability during use.

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

[0050] A baffle plate 1201 is fixedly provided on the adjusting rod 12 , and a compression spring 10 is provided between the baffle plate 1201 and the guide tube 9 . The compression spring 10 is installed on the outer side of the slide bar 3 , and the compression spring 10 plays a role in resetting the slide bar 3 .

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

[0052] A sensing plane 303 corresponding to the proximity sensor 1 is formed on the side wall of the upper end of the slide bar 3 . The setting of the sensing plane 303 ensures the sensing accuracy of the proximity sensor 1 .

[0053] In some embodiments, an end surface of the sliding tube 11 adjacent to the baffle 1201 is provided with an anti-slip structure, and the anti-slip structure is an anti-slip pattern.

[0054] In other embodiments, an internal threaded tube 1101 corresponding to the limiting plane 301 is fixedly provided on the side wall of the sliding tube 11, and the internal thread of the internal threaded tube 1101 is connected to the limiting bolt 8, and the limiting bolt 8 protrudes from the inner wall of the sliding tube 11; a positioning groove 1102 is opened on the end surface of the sliding tube 11 adjacent to the baffle 1201, and the number of the positioning grooves 1102 is multiple, and the multiple positioning grooves 1102 are evenly arranged circumferentially along the sliding tube 11; a positioning column 1202 corresponding to the positioning groove 1102 is fixedly provided on the baffle 1201, and the positioning column 1202 is located on the inner side of the positioning groove 1102, and the limiting bolt 8 prevents the sliding tube 11 and the sliding rod 3 from rotating relative to each other. The setting of the positioning column 1202 and the positioning groove 1102 can prevent the adjusting rod 12 and the sliding rod 3 from rotating relative to each other, thereby improving the stability during use.

[0055] Working process:

[0056] The pressed screw 4 moves upward and when it contacts the lower end of the adjusting rod 12, it drives the sliding rod 3 to move upward. During this process, the compression spring 10 is further compressed. When the proximity sensor 1 senses the sliding rod 3, it sends a signal to the PLC controller. The PLC controller turns off the driver of the pressed screw 4, and the pressed screw 4 stops moving.

[0057] Compared with the traditional limit device that 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 contaminating the proximity sensor, which not only improves the service life of the proximity sensor 1, but also ensures safety during use.

[0058] The limit position can be adjusted by rotating the adjustment rod 12, and the operation process is convenient.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A screw limiter for a rough rolling reversible rolling mill, characterized in that: include: A first protective cover (5), 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); A guide tube (9), wherein the guide tube (9) is fixedly mounted on the upper cover plate (6) of the first protective cover (5), and the guide tube (9) corresponds to the position of the pressing screw (4); A slide rod (3), wherein the slide rod (3) is movably connected to the inner side of the guide tube (9); A proximity sensor (1) is arranged corresponding to the upper end of the sliding rod (3).

2. The rough rolling reversible rolling mill pressing screw limiting device according to claim 1 is characterized in that: A second protective cover (2) is fixedly mounted 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 both located on the inner side of the second protective cover (2).

3. The pressing screw limiting device for a rough rolling reversible rolling mill according to claim 2 is characterized in that: An annular limiting boss (901) is fixedly provided on the outer side of the upper end of the guide tube (9), a mounting seat (7) is fixedly provided on the cover plate (6), a mounting hole (702) is provided on the mounting seat (7), a mounting groove (701) corresponding to the mounting hole (702) is provided 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 on the inner side of the mounting groove (701), the guide tube (9) passes through the mounting hole (702), and the cover plate (6) is located on the inner side of the first protective cover (5); The lower end of the sliding rod (3) passes through the guide tube (9) and is located inside the first protective cover (5).

4. The pressing screw limiting device for a rough rolling reversible rolling mill according to claim 3 is characterized in that: The sliding rod (3) is a round rod; A limiting plane (301) is formed on the side wall of the slide rod (3), a limiting hole (902) corresponding to the limiting plane (301) is formed on the guide tube (9), a first threaded hole (703) corresponding to the limiting hole (902) is formed on the mounting seat (7), a limiting bolt (8) is connected to the inner thread of the first threaded hole (703), and the limiting bolt (8) passes through the limiting hole (902) and protrudes out of the inner wall of the guide tube (9).

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

6. A rough rolling reversible rolling mill press screw limiter according to claim 5, characterized in that: A baffle (1201) is fixedly provided on the adjusting rod (12), a compression spring (10) is provided between the baffle (1201) and the guide tube (9), and the compression spring (10) is installed on the outer side of the sliding rod (3).

7. A rough rolling reversible rolling mill press screw limiter according to claim 6, characterized in that: A sliding tube (11) is provided between the compression spring (10) and the baffle (1201), the inner diameter of the sliding tube (11) matches the diameter of the sliding rod (3), and the sliding tube (11) is installed on the outer side of the sliding rod (3).

8. The pressing screw limiting device for a roughing reversible rolling mill according to claim 7 is characterized in that: The end surface of the sliding tube (11) adjacent to the baffle (1201) is provided with an anti-slip structure.

9. The pressing screw limiting device for a roughing reversible rolling mill according to claim 7, characterized in that: An internally threaded tube (1101) corresponding to the limiting plane (301) is fixedly provided on the side wall of the sliding tube (11), and the internal thread of the internally threaded tube (1101) is connected to a limiting bolt (8), and the limiting bolt (8) protrudes from the inner side wall of the sliding tube (11); A positioning groove (1102) is formed on the end surface of the slide tube (11) adjacent to the baffle (1201), and the number of the positioning grooves (1102) is multiple, and the multiple positioning grooves (1102) are evenly arranged in the circumferential direction along the slide tube (11); A positioning column (1202) corresponding to the positioning groove (1102) is fixedly provided on the baffle (1201), and the positioning column (1202) is located on the inner side of the positioning groove (1102).

10. The pressing screw limiting device for a roughing reversible rolling mill according to claim 1, characterized in that: A sensing plane (303) corresponding to the proximity sensor (1) is formed on the side wall of the upper end of the sliding rod (3).

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