Locking device for roll gap adjusting mechanism of rolling mill

Abstract

The utility model discloses a locking device for a roll gap adjusting mechanism of a rolling mill, belongs to the technical field of rolling mills, and aims to solve the problem that the locking device for the roll gap adjusting mechanism is easy to damage to cause locking failure. Comprising a locking seat, a locking inner sleeve and positioning bolts, a plurality of through screw holes formed in the radial direction are formed in the hole wall of the adjusting inner hole, the positioning bolts are matched with the through screw holes in a one-to-one correspondence mode, and when the locking device locks the roll gap adjusting mechanism, the periphery of the locking inner sleeve is matched with the adjusting inner hole in a rotating mode. The square column structure of the long shaft is matched with the square inner hole, and any positioning bolt abuts against the periphery of the locking inner sleeve. A hard alloy wear-resistant layer is overlaid on the hole wall of the adjusting inner hole, and the periphery of the locking inner sleeve is in running fit with the hard alloy wear-resistant layer. The number of the through screw holes is increased to be a plurality, and the purpose of prolonging the service life of spare parts is achieved. The hard alloy wear-resistant layer can effectively reduce the wear of the locking seat, prolong the service life of the component and avoid the inconvenience of replacing the locking seat.

Description

Technical Field

[0001] The utility model belongs to the technical field of rolling mills, in particular to a locking device for a roll gap adjustment mechanism of a rolling mill. Background Art

[0002] A rolling mill is a device that performs the metal rolling process and is typically equipped with multiple sets of cooperating rollers. The gap between each set of rollers needs to be set based on the billet and the resulting profile. Therefore, the mill is equipped with a roll gap adjustment mechanism.

[0003] A roll gap adjustment mechanism of a rolling mill is provided with a long shaft, the end of the long shaft is a square column structure, the long shaft passes through the mechanism cover, the square column structure of the long shaft cooperates with the square inner hole of the locking inner sleeve, the outer periphery of the locking inner sleeve rotates with the inner hole of the locking seat, the lower end of the locking seat is connected to the mechanism support plate under the mechanism cover, the roll gap can be adjusted by rotating the long shaft, and after the roll gap is adjusted, the outer periphery of the locking inner sleeve is tightened by the positioning bolt that cooperates with the locking seat thread, thereby completing the locking of the roll gap adjustment mechanism.

[0004] The locking device of the existing roller gap adjustment mechanism has several shortcomings:

[0005] 1. Since the position of the locking seat must be fixed and no loosening or tilting is allowed, the locking seat and the mechanism support plate are connected by welding. The locking screw hole provided on the locking seat and matched with the positioning bolt is a load-bearing structure and is prone to damage. If the locking screw hole is damaged, the locking seat needs to be cut, replaced and then welded, which slows the maintenance efficiency.

[0006] 2. It is found during use that the inner hole of the locking seat is the part most susceptible to wear. Once the inner hole of the locking seat is worn, it is very troublesome to replace or repair it.

[0007] 3. Since the relative rotation angle between the inner locking sleeve and the locking seat is not fixed, and the positioning bolt is not fixedly pressed against the outer periphery of the locking inner sleeve, the outer periphery of the locking inner sleeve of the locking device of the existing roller gap adjustment mechanism is a cylindrical surface, and is locked only by the friction between the end face of the positioning bolt and the outer periphery of the locking inner sleeve, which is prone to loosening. Utility Model Content

[0008] The purpose of this utility model is to provide a locking device for a roll gap adjustment mechanism of a rolling mill, so as to solve the problem that the locking device of the existing roll gap adjustment mechanism is easily damaged, resulting in locking failure, and the maintenance or replacement efficiency is slow. The technical solution adopted by this utility model is as follows:

[0009] A locking device for a roll gap adjustment mechanism of a rolling mill, wherein the roll gap adjustment mechanism is provided with a long shaft, which passes through a mechanism gland, and a mechanism support plate is provided below the mechanism gland. The locking device comprises a locking seat, a locking inner sleeve, and a positioning bolt. The lower end of the locking seat is connected to the mechanism support plate, the locking inner sleeve is provided with a square inner hole, the end of the long shaft is a square column structure, and the locking seat is provided with an adjustment inner hole;

[0010] A plurality of radially arranged transparent screw holes are provided on the hole wall of the adjusting inner hole, and a plurality of positioning bolts are matched with the plurality of transparent screw holes one by one. When the locking device locks the roller gap adjustment mechanism, the outer periphery of the locking inner sleeve is rotated to match the adjusting inner hole, the square column structure of the long axis is matched with the square inner hole, and any positioning bolt is tightened against the outer periphery of the locking inner sleeve.

[0011] Furthermore, the number of the through screw holes is three.

[0012] Furthermore, a hard alloy wear-resistant layer is built-up on the hole wall of the adjusting inner hole, and the outer periphery of the locking inner sleeve is rotatably matched with the hard alloy wear-resistant layer.

[0013] Furthermore, a plurality of conical pits are arranged circumferentially on the outer periphery of the locking inner sleeve, and a conical tip is provided on the tightening end of the positioning bolt. When the locking device locks the roller gap adjustment mechanism, the conical tip of any positioning bolt cooperates with the adjacent nearest conical pit.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model adopts a redundant design for the transparent screw holes, and processes the number of transparent screw holes into multiple ones, so that one can be used and multiple can be prepared. When the used transparent screw hole is damaged, other transparent screw holes can be replaced and used, which effectively extends the service life of the locking seat and avoids problems such as slow maintenance efficiency caused by replacing the locking seat.

[0016] 2. A hard alloy wear-resistant layer is welded on the wall of the adjusting inner hole, which can also increase the service life of the locking seat. If the locking inner sleeve is worn, only the locking inner sleeve needs to be replaced, which can also avoid problems such as slow maintenance efficiency caused by replacing the locking seat.

[0017] 3. Although the relative rotation angle between the locking inner sleeve and the locking seat is not fixed, when the long axis is rotated and the roll gap is adjusted, the positioning bolt is screwed to make the tapered top of the positioning bolt match the adjacent tapered pit, which will not affect the size of the roll gap. The combination of the tapered top and the tapered pit can make the tightening of the positioning bolt more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the locking roller gap adjustment mechanism of the utility model;

[0019] Figure 2 It is a side view of the utility model;

[0020] Figure 3 It is an end view of the utility model;

[0021] Figure 4 It is a cross-sectional view of the locking seat of the utility model;

[0022] Figure 5 It is a cross-sectional view of the locking inner sleeve of the utility model;

[0023] Figure 6 It is a structural diagram of the positioning bolt;

[0024] Figure 7 It is a cross-sectional view of the original locking seat;

[0025] Figure 8 It is a cross-sectional view of the original locking inner sleeve.

[0026] In the figure, 1. long shaft, 2. mechanism pressure cover, 3. positioning bolt, 4. locking inner sleeve, 5. locking seat, 6. mechanism support plate, 7. adjustment inner hole, 8. transparent screw hole, 9. carbide wear-resistant layer, 10. square inner hole, 11. conical pit, 12. conical top. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments illustrated in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0028] The connections mentioned in this utility model are divided into fixed connections and detachable connections. The fixed connection refers to a non-detachable connection, including but not limited to conventional fixed connection methods such as hem connection, rivet connection, adhesive connection, and welding connection. The detachable connection refers to but not limited to conventional detachable connection methods such as bolt connection, snap connection, pin connection, and hinge connection. When the specific connection method is not clearly specified, it is assumed that at least one connection method can be found among the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example, a fixed connection may be a welding connection, and a detachable connection may be a bolt connection.

[0029] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are provided to explain the present invention, but the present invention is not limited to the following embodiments.

[0030] Example: Figures 1 to 8As shown, a locking device for a roll gap adjustment mechanism of a rolling mill is provided. The roll gap adjustment mechanism is provided with a long shaft 1, which passes through a mechanism gland 2. A mechanism support plate 6 is provided below the mechanism gland 2. The locking device includes a locking seat 5, a locking inner sleeve 4, and a positioning bolt 3. The lower end of the locking seat 5 is connected to the mechanism support plate 6. The locking inner sleeve 4 is provided with a square inner hole 10. The end of the long shaft 1 is a square column structure. The locking seat 5 is provided with an adjustment inner hole 7.

[0031] A plurality of radially arranged transparent screw holes 8 are provided on the hole wall of the adjusting inner hole 7, and a plurality of positioning bolts 3 are matched with the plurality of transparent screw holes 8 in a one-to-one manner. When the locking device locks the roller gap adjustment mechanism, the outer periphery of the locking inner sleeve 4 is rotated to cooperate with the adjusting inner hole 7, the square column structure of the long axis 1 is matched with the square inner hole 10, and any positioning bolt 3 is tightened against the outer periphery of the locking inner sleeve 4.

[0032] The utility model adopts a redundant design for the transparent screw hole 8, and processes the transparent screw hole 8 into multiple ones, so that one is used and multiple are prepared. When the used transparent screw hole 8 is damaged, other transparent screw holes 8 can be replaced and used, thereby effectively extending the service life of the locking seat 5 and avoiding problems such as slow maintenance efficiency caused by replacing the locking seat 5.

[0033] The number of the through screw holes 8 is three.

[0034] A hard alloy wear-resistant layer 9 is welded onto the wall of the adjusting inner hole 7, and the outer periphery of the locking inner sleeve 4 is rotatably engaged with the hard alloy wear-resistant layer 9. The hard alloy wear-resistant layer 9 welded onto the wall of the adjusting inner hole 7 also increases the service life of the locking seat 5. If the locking inner sleeve 4 becomes worn, it only needs to be replaced, thus avoiding problems such as slow maintenance efficiency caused by replacing the locking seat 5.

[0035] The outer circumference of the locking inner sleeve 4 is arranged with a plurality of conical pits 11, and the tightening end of the positioning bolt 3 is provided with a conical top 12. When the locking device locks the roller gap adjustment mechanism, the conical top 12 of any positioning bolt 3 cooperates with the adjacent and nearest conical pit 11.

[0036] Although the relative rotation angle between the locking inner sleeve 4 and the locking seat 5 is not fixed, when the long shaft 1 is rotated and the roll gap is adjusted, the positioning bolt 3 is screwed so that the conical top 12 of the positioning bolt 3 is matched with the adjacent conical pit 11, which does not affect the size of the roll gap. The matching of the conical top 12 and the conical pit 11 can make the tightening of the positioning bolt 3 more reliable.

[0037] The above embodiments are merely illustrative of the present invention and do not limit its scope of protection. Those skilled in the art may make partial changes thereto, which are within the scope of protection of the present invention as long as they do not exceed the spirit of the present invention.

Claims

1. A locking device for a roll gap adjustment mechanism of a rolling mill, wherein the roll gap adjustment mechanism is provided with a long shaft (1), the long shaft (1) passes through a mechanism pressure cover (2), a mechanism support plate (6) is provided below the mechanism pressure cover (2), the locking device comprises a locking seat (5), a locking inner sleeve (4) and a positioning bolt (3), the lower end of the locking seat (5) is connected to the mechanism support plate (6), the locking inner sleeve (4) is provided with a square inner hole (10), the end of the long shaft (1) is a square column structure, and the locking seat (5) is provided with an adjustment inner hole (7); Its characteristics are: A plurality of radially arranged through screw holes (8) are provided on the hole wall of the adjusting inner hole (7), and a plurality of positioning bolts (3) are matched with the plurality of through screw holes (8) in a one-to-one correspondence. When the locking device locks the roller gap adjustment mechanism, the outer periphery of the locking inner sleeve (4) is rotationally matched with the adjusting inner hole (7), the square column structure of the long axis (1) is matched with the square inner hole (10), and any positioning bolt (3) is pressed against the outer periphery of the locking inner sleeve (4).

2. The locking device for a rolling mill roll gap adjustment mechanism according to claim 1, characterized in that: The number of the through screw holes (8) is three.

3. The locking device for a rolling mill roll gap adjustment mechanism according to claim 1, characterized in that: A hard alloy wear-resistant layer (9) is built-up welded on the hole wall of the regulating inner hole (7), and the outer periphery of the locking inner sleeve (4) is rotationally matched with the hard alloy wear-resistant layer (9).

4. A locking device for a rolling mill roll gap adjustment mechanism according to any one of claims 1 to 3, characterized in that: The outer circumference of the locking inner sleeve (4) is provided with a plurality of conical pits (11), and the tightening end of the positioning bolt (3) is provided with a conical top (12). When the locking device locks the roller gap adjustment mechanism, the conical top (12) of any positioning bolt (3) is matched with the adjacent and nearest conical pit (11).

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