CN110864177A

CN110864177A - Rolling mill hydraulic joint anti loosening structure

Info

Publication number: CN110864177A
Application number: CN201910963588.3A
Authority: CN
Inventors: 刘凯; 夏振江; 崔亚涛; 宋凯召; 鲁现群; 孟磊; 王树有
Original assignee: Handan Iron and Steel Group Co Ltd; Hangang Group Hanbao Iron and Steel Co Ltd
Current assignee: Handan Iron and Steel Group Co Ltd; Hangang Group Hanbao Iron and Steel Co Ltd
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-03-06

Abstract

The anti-loosening structure of the hydraulic joint of the rolling mill comprises a right-angle block, a welding joint, a nut, a sealing ring and a connecting bolt; sealing rings are arranged at the joint of the connecting bolt and the right-angle block and the joint of the welding head and the right-angle block; a through hole is formed in the middle of the connecting bolt body; the tail part of the bolt body is provided with a connecting thread; anti-loosening threaded holes are formed in two ends of a diagonal line on the top of the nut; two screws with the length equal to the thickness of the connecting bolt and the nut are arranged in two anti-loosening threaded holes arranged on the diagonal line of the nut; the lower part of the screw is propped against the upper plane of the right-angle block; the connecting bolt passes through the right-angle block and is installed on the rolling mill through connecting threads; the thickness and the size of a top nut of the connecting bolt are larger than those of a common standard nut; the beneficial effects are as follows: the bolt is convenient to disassemble; the accident that the joint connecting bolt is loosened is avoided, the working reliability of a high-pressure hydraulic system of the rolling mill is improved, the hydraulic oil consumption is saved, the accident time is reduced, and the stable production of the cold-rolled plate strip is ensured.

Description

Rolling mill hydraulic joint anti loosening structure

Technical Field

The invention relates to the technical field of steel rolling auxiliary equipment, in particular to a rolling mill hydraulic joint anti-loosening structure for preventing a hydraulic joint from loosening caused by vibration of a cold rolling mill.

Background

In the rolling process of cold-rolled sheet strips, various hydraulic devices are used. The hydraulic equipment in the cold rolling mill is provided with an HGC (high gradient coefficient) reduction system for controlling rolling force, a wedge system and a lining block system for controlling roll gap, an intermediate roll bending roll for controlling the position of a roll, a working roll bending roll and a supporting roll balancing system. The hydraulic systems are arranged more intensively and the pipelines are arranged densely. Therefore, in order to save space, a right-angle joint with a drift diameter is generally adopted in a cold rolling mill. The joint is more applied to hydraulic pipelines of a working roll bending roll, a middle roll bending roll and a supporting roll balancing system. The square connector reduces the turning radius space when the connector turns due to the square design, so that the right-angle connector is widely used for connecting the connector of a hydraulic system of a rolling mill. However, the pressure-resistant grade of the joint is not high in the using process, the pressure-resistant grade of the joint of a general path is only 250bar, and the highest pressure of a high-pressure system of a rolling mill is 280 bar. Once abnormal vibration impact such as belt breakage, steel piling and the like occurs, the joint is easy to have the accident that the connecting bolt loosens to cause oil leakage of the sealing surface, the working pressure of the system is high, the space position of the joint is narrow, the oil injection quantity of oil leakage at each time is large, and the accident treatment is very time-consuming.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a rolling mill hydraulic joint anti-loosening structure which is used for improving the working reliability of a high-pressure hydraulic system, ensuring the rolling quality of a cold-rolled plate strip and preventing joint connecting bolts from loosening caused by impact of the hydraulic system.

The problem of the invention is realized by the following technical scheme: the anti-loosening structure of the hydraulic joint of the rolling mill comprises a welding head and a nut, wherein the welding head is fixedly connected with the nut through a right-angle block; the sealing rings b and c are arranged at the upper part and the lower part of the joint of the connecting bolt and the right-angle block; a sealing ring a is arranged at the joint of the welding head and the right-angle block; the anti-loosening bolt is characterized by further comprising a connecting bolt, and a connecting thread, a loosening-preventing threaded hole and a nut which are arranged on the connecting bolt; the middle part of the bolt body of the connecting bolt is provided with a through hole; the tail part of the bolt body is provided with a connecting thread; anti-loosening threaded holes are formed in two ends of a diagonal line on the top of the nut; two screws with the length equal to the thickness of the connecting bolt and the nut are arranged in two anti-loosening threaded holes arranged on the diagonal line of the nut; the lower part of the screw is propped against the upper plane of the right-angle block; the connecting bolt passes through the right-angle block and is installed on the rolling mill through connecting threads; the thickness of a top nut of the connecting bolt is 8 mm-10 mm larger than that of a common standard nut; the size of the top nut of the connecting bolt is 5 mm-10 mm larger than that of a common standard nut. The bolt is characterized in that the thickness of a nut of the connecting bolt is 12 mm-20 mm; the length of a hexagonal head diagonal line of the bolt cap of the connecting bolt is 41 mm-46 mm; two ends of the hexagonal diagonal line are respectively provided with a locking screw.

The invention has the beneficial effects that: due to the fact that the screw locking and looseness preventing principle is utilized, in the structural design of looseness prevention of the hydraulic connector of the cold rolling mill, the thickness of a connecting bolt and a nut is designed to be 12 mm-20 mm, and clamping and dismounting of a wrench are facilitated; the hexagonal head of the nut is designed to be 41 mm-46 mm. This allows the mounting of the M6 jam screw at the hexagonal corner. The design results avoid the accident that the right-angle joint is loosened due to hydraulic oil impact and the joint connecting bolt caused by rolling mill vibration, greatly improve the working reliability of a high-pressure hydraulic system of the rolling mill, thereby saving the consumption of hydraulic oil, reducing the accident time and ensuring the smooth production.

Drawings

FIG. 1 is a schematic view of an assembly structure in a rolling mill hydraulic joint anti-loosening structure according to an embodiment of the invention;

FIG. 2 is a front view of the connecting bolt 6 of FIG. 1;

FIG. 3 is a side view of the connecting bolt 6 of FIG. 1;

FIG. 4 is a schematic view of the top surface of the bolt head of the connecting bolt 6 in FIG. 1;

fig. 5 is a structural axial view of the connecting bolt 6 in fig. 1.

In the drawings: 1. a right-angle block; 2. a nut; 3. welding a head; 4. a sealing ring a; 5. a sealing ring b; 6. a connecting bolt; 7. a seal ring c; 8. connecting threads; 9. a locking threaded hole; 10. a nut; 11. and (4) screws.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings. As shown in the attached figures 1-5: the anti-loosening structure of the hydraulic joint of the rolling mill comprises a welding head 3 and a nut 2, wherein the welding head 3 and the nut 2 are fixedly connected through a right-angle block 1; the upper and lower sealing rings b5 and c7 which are arranged on the joint of the bolt body of the connecting bolt 6 and the right-angle block 1 and the sealing ring a4 which is arranged on the joint of the welding head 3 and the right-angle block 1; the anti-loosening nut is characterized by further comprising a connecting bolt 6, a connecting thread 8, a loosening-preventing threaded hole 9 and a nut 10; the connecting bolt 6 with the through hole in the middle of the bolt body consists of a nut 10, a connecting thread 8 with threads at the tail part and anti-loosening threaded holes 9 arranged at two ends of the diagonal line at the top of the nut 10 which are connected into a whole; two screws 11 with the length equal to the thickness of a nut 10 of the connecting bolt 6 are arranged in two anti-loosening threaded holes 9 arranged on the diagonal line of the nut 10 at the top of the connecting bolt 6, and the lower parts of the screws 11 are propped against the upper plane of the right-angle block 1; the connecting bolt 6 passes through the right-angle block 1 and is installed on the rolling mill through a connecting thread 8; the thickness of a top nut 10 of the connecting bolt 6 is 8 mm-10 mm larger than that of a common standard nut; the size of a top nut 10 of the connecting bolt 6 is also larger than that of a common standard nut by 5-10 mm; in the embodiment of the invention, the thickness of the bolt cap 10 of the connecting bolt 6 is increased from 12mm to 20mm, the hexagonal diagonal line of the bolt cap 10 of the connecting bolt 6 is increased from 41mm to 46mm, and 1M 6 anti-loosening screw is respectively arranged in the threaded holes 9 arranged at two ends of the hexagonal diagonal line. Through installing the locking screw on the screw hole 9 of the nut 10 diagonal of the connecting bolt 6, the spanner is convenient to disassemble the bolt, and the purpose of preventing the connecting thread 8 from loosening is also achieved.

Claims

1. A rolling mill hydraulic joint anti-loosening structure comprises a welding head (3) and a nut (2), wherein the welding head (3) and the nut are fixedly connected through a right-angle block (1) and are in threaded connection; the upper part and the lower part of the joint of the connecting bolt (6) and the right-angle block (1) are provided with a sealing ring b (5) and a sealing ring c (7); a sealing ring a (4) arranged at the joint of the welding head (3) and the right-angle block (1); the anti-loosening screw is characterized by further comprising a connecting bolt (6), and a connecting thread (8), a loosening-preventing threaded hole (9) and a nut (10) which are arranged on the connecting bolt (6); the middle part of the bolt body of the connecting bolt (6) is provided with a through hole; the tail part of the bolt body is provided with a connecting thread (8); anti-loosening threaded holes (9) are formed in two ends of a diagonal line of the top of the nut (10); two screws (11) with the length equal to the thickness of a nut (10) of the connecting bolt (6) are arranged in two anti-loosening threaded holes (9) arranged on the diagonal line of the nut (10); the lower part of the screw (11) is propped against the upper plane of the right-angle block (1); the connecting bolt (6) passes through the right-angle block (1) and is installed on the rolling mill through a connecting thread (8); the thickness of a top nut (10) of the connecting bolt (6) is 8 mm-10 mm larger than that of a common standard nut; the size of the top nut (10) of the connecting bolt (6) is 5 mm-10 mm larger than that of a common standard nut.

2. The rolling mill hydraulic joint looseness prevention structure as defined in claim 1, wherein a thickness of the nut (10) of the connecting bolt (6) is 12 mm-20 mm; the length of a hexagonal head diagonal line of a bolt cap (10) of the connecting bolt (6) is 41-46 mm; two ends of the hexagonal diagonal are respectively provided with a locking screw (11).