Novel rolling line elevation adjusting hydraulic cylinder

Abstract

A novel rolling line elevation adjusting hydraulic cylinder comprises a locking front end cover, a locking cylinder barrel, a locking rear end cover, an elastic locking sleeve, a deep hole piston rod and a hydraulic cylinder body, the locking front end cover is connected with the front end of the locking cylinder barrel, the locking rear end cover is connected with the rear end of the locking cylinder barrel, and a connecting end plate is arranged between the locking rear end cover and the front end of the hydraulic cylinder body. The connecting end plate is connected with the locking rear end cover and the front end of the hydraulic cylinder body, the elastic locking sleeve is coaxially installed in the locking cylinder barrel, the two ends of the elastic locking sleeve are in tight pressing and sealing contact with the locking front end cover and the locking rear end cover respectively, and a first liquid through hole is formed in the barrel wall of the middle of the locking cylinder barrel. The deep hole piston rod extends out of the front end of the hydraulic cylinder body and coaxially penetrates through the connecting end plate, the locking rear end cover, the elastic locking sleeve and the locking front end cover. The deep hole piston rod locking device is scientific in design and simple in structure, the stress face and deformation of the elastic locking sleeve are uniform, the deep hole piston rod is locked firmly, and the locking effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of a rolling line adjustment device in a plate and strip finishing mill, in particular to a novel rolling line elevation adjustment hydraulic cylinder. Background Art

[0002] In the rolling of plate and strip materials in the metallurgical industry, the rollers in the rolling mill are often replaced and ground, and their diameters will produce large inconsistencies. At this time, certain measures need to be applied to adjust and compensate the rolling line. The existing rolling line adopts a composite adjustment device composed of an inclined wedge and a step pad for adjustment and compensation to ensure that the elevation of the unit rolling line is constant. When adjusting and compensating, the elevation hydraulic cylinder first pushes the step pad for initial adjustment, and the adjustment is step-type; then after the initial adjustment is completed, the hydraulic locking sleeve of the elevation hydraulic cylinder itself locks the hydraulic cylinder to prevent misoperation; finally, another elevation hydraulic cylinder pushes the inclined wedge block for fine adjustment, and the adjustment of the inclined wedge block is stepless. After the fine adjustment is completed, the hydraulic locking sleeve of the elevation hydraulic cylinder itself also locks the elevation hydraulic cylinder to prevent misoperation. At present, the existing elevation hydraulic cylinders often have the problem of unreliable hydraulic locking after being used for a certain period of time. The original structure of the hydraulic locking of the existing elevation hydraulic cylinders is analyzed, such as Figure 1 When hydraulic locking is required, high-pressure oil enters the first liquid inlet hole 2, the first piston 3 squeezes the locking sleeve 4, and the locking sleeve 4 deforms and presses the deep-hole piston rod 1 to complete the locking. When unlocking, the high-pressure oil in the first liquid inlet hole 2 is unloaded, and the second liquid inlet hole 69 enters the high-pressure oil, the first piston 3 moves away from the locking sleeve 4, and the locking sleeve 4 returns to its initial shape, releasing the locking of the deep-hole piston rod 1. Among them, the locking sleeve 4 is wedge-shaped, and the contact surface between the first piston 3 and the locking sleeve 4 does not completely cover the inclined surface of the locking sleeve 4, resulting in uneven force and deformation at the locking position, uneven pressure on the deep-hole piston rod 1 at the locking position, and the friction force does not reach the best, which leads to the problem of unreliable hydraulic locking.

[0003] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0004] The purpose of the utility model is to provide a new rolling line elevation adjustment hydraulic cylinder in view of the deficiencies in the prior art. The utility model has a scientific design, a simple structure, a relatively uniform stress surface and deformation of the elastic locking sleeve, a reliable locking of the deep hole piston rod, and a better locking effect.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: a new type of rolling line elevation adjustment hydraulic cylinder, comprising a locking front end cover, a locking cylinder barrel, a locking rear end cover, an elastic locking sleeve, a deep hole piston rod and a hydraulic cylinder body, the locking front end cover is connected to the front end of the locking cylinder barrel, the locking rear end cover is connected to the rear end of the locking cylinder barrel, a connecting end plate is provided between the locking rear end cover and the front end of the hydraulic cylinder body, the connecting end plates are respectively connected to the locking rear end cover and the front end of the hydraulic cylinder body, the elastic locking sleeve is coaxially installed in the locking cylinder barrel, the two ends of the elastic locking sleeve are respectively in tight sealing contact with the locking front end cover and the locking rear end cover, a first liquid through hole is provided on the middle barrel wall of the locking cylinder barrel, the deep hole piston rod extends from the front end of the hydraulic cylinder body and coaxially passes through the connecting end plate, the locking rear end cover, the elastic locking sleeve and the locking front end cover, and the deep hole piston rod is slidably connected to the connecting end plate, the locking rear end cover, the elastic locking sleeve and the locking front end cover.

[0006] Based on the above, a pressure-bearing ring groove is provided on the middle outer circle of the elastic locking sleeve, the outer circles of the two end portions of the elastic locking sleeve are tightly fitted with the inner circle of the locking cylinder, a pressure-bearing oil chamber is formed between the pressure-bearing ring groove and the inner circle of the locking cylinder, the first liquid hole is connected with the pressure-bearing oil chamber, there is a gap between the middle inner circle of the elastic locking sleeve and the deep-hole piston rod, the inner circles of the two end portions of the elastic locking sleeve are provided with step grooves, the front end of the locking cylinder is provided with a plurality of first threaded blind holes arranged in a circumferential array, and the rear end of the locking cylinder is provided with a plurality of second threaded blind holes arranged in a circumferential array.

[0007] Based on the above, the locking front end cover is connected to the front end of the locking cylinder through a plurality of first countersunk screws, and a plurality of first countersunk holes arranged in a circumferential array are opened on the front end surface of the locking front end cover, and each first countersunk hole corresponds to each first threaded blind hole one by one front and back, and each first countersunk screw is respectively installed in each first countersunk hole and threadedly installed in each corresponding first threaded blind hole, and a first stepped sleeve is integrally formed on the inner edge of the middle part of the rear end surface of the locking front end cover, which is located in the middle of each first countersunk hole and is thicker in front and thinner in the back, and a first step surface is formed at the connection between the front section thick sleeve and the rear section thin sleeve of the first stepped sleeve, and the first stepped sleeve is coaxially inserted in the front port of the locking cylinder, and the front section thick sleeve of the first stepped sleeve is The outer circle of the sleeve is tightly fitted with the inner circle of the locking cylinder, a first sealing ring groove is provided on the outer circle of the front thick sleeve of the first stepped sleeve, a first sealing ring is installed in the first sealing ring groove, the rear thin sleeve of the first stepped sleeve is coaxially inserted in the front step groove, the outer circle of the rear thin sleeve of the first stepped sleeve is tightly fitted with the inner circle of the front step groove, the rear end of the rear thin sleeve of the first stepped sleeve is pressed in contact with the bottom of the step groove on the front side, the front end of the elastic locking sleeve is pressed in contact with the first step surface, a second sealing ring groove is provided on the outer circle of the rear thin sleeve of the first stepped sleeve, a second sealing ring groove is installed in the second sealing ring groove, a second sealing ring is sealed in contact with the inner circle of the front step groove;

[0008] The inner circle of the locking front end cover is provided with a first dustproof groove and two first support ring grooves spaced apart at front and rear. The first dustproof groove is provided with a first dustproof ring which is mounted on the deep hole piston rod and slides with the deep hole piston rod. The first support ring groove is provided with a first support ring which is mounted on the deep hole piston rod and slides with the deep hole piston rod.

[0009] Based on the above, the locking rear end cover is connected to the rear end of the locking cylinder and the connecting end plate through a plurality of first fastening screws, and the locking rear end cover is provided with a plurality of first light holes arranged in a circumferential array, and the outer edge of the connecting end plate is provided with a plurality of second light holes arranged in a circumferential array, and each second light hole, each first light hole and each second threaded blind hole respectively correspond to each other front to back, and each first fastening screw respectively passes through the corresponding second light hole and the first light hole and is threadedly installed in the corresponding second threaded blind hole, and the inner edge of the middle part of the front end face of the locking rear end cover is integrally formed with a second stepped sleeve located in the middle of each first light hole and being thin in front and thick in the back, and a second step surface is formed at the connection between the front thin sleeve and the rear thick sleeve of the second stepped sleeve, and the second stepped sleeve is coaxially inserted Connected to the rear port of the locking cylinder, the outer circle of the rear section thick sleeve of the second stepped sleeve is tightly fitted with the inner circle of the locking cylinder, a third sealing ring groove is provided on the outer circle of the rear section thick sleeve of the second stepped sleeve, a third sealing ring is installed in the third sealing ring groove for sealing contact with the inner circle of the locking cylinder, the front section thin sleeve of the second stepped sleeve is coaxially inserted in the step groove on the rear side, the outer circle of the front section thin sleeve of the second stepped sleeve is tightly fitted with the inner circle of the step groove on the rear side, the front end of the front section thin sleeve of the second stepped sleeve is pressed in contact with the bottom of the step groove on the rear side, the rear end of the elastic locking sleeve is pressed in contact with the second step surface, a fourth sealing ring groove is provided on the outer circle of the front section thin sleeve of the second stepped sleeve, a fourth sealing ring groove is installed in the fourth sealing ring groove for sealing contact with the inner circle of the step groove on the rear side.

[0010] Based on the above, a plurality of second countersunk holes in a circumferential array are opened at the inner edge of the middle portion of the front end surface of the connecting end plate, and the connecting end plate is connected to the front end of the hydraulic cylinder body through a plurality of second countersunk screws respectively installed in each second countersunk hole.

[0011] Based on the above, the hydraulic cylinder body includes a front end cover of the cylinder, a cylinder barrel, a rear end cover of the cylinder and a displacement sensor. The outer circles of the two ends of the cylinder barrel are provided with external threads and are respectively threaded with flanges. The front end cover of the cylinder is connected to the flange on the front side by a plurality of third countersunk screws arranged in a circumferential array, and the rear end cover of the cylinder is connected to the flange on the rear side by a plurality of fourth countersunk screws arranged in a circumferential array. The inner end of the deep-hole piston rod is fixedly installed with a second piston coaxially slidably arranged in the cylinder barrel. A sixth sealing ring groove and two third supporting ring grooves spaced front and rear are provided on the outer circumference of the second piston. The sixth sealing ring groove is located between the two third supporting ring grooves. A sixth sealing ring groove is installed in the sixth sealing ring groove for sealing and sliding contact with the inner circle of the cylinder barrel. A sealing ring, a third support ring is installed in the third support ring groove, which is in sliding contact with the inner circle of the cylinder barrel. A second liquid hole that is connected to the inner cavity of the cylinder barrel and is located in front of the second piston is opened on the side wall of the front end cover of the cylinder. A third liquid hole that is connected to the inner cavity of the cylinder barrel and is located on the rear side of the second piston is opened on the side wall of the rear end cover of the cylinder. A shield is connected to the middle part of the rear end surface of the rear end cover of the cylinder through a plurality of second fastening screws. The displacement sensor is arranged in the shield and fixedly installed at the center of the rear end surface of the rear end cover of the cylinder. A sensor mounting hole is provided in the center of the rear end cover of the cylinder. The detection part of the displacement sensor extends into the cylinder barrel through the sensor mounting hole and is connected with the deep hole piston rod. The detection part of the displacement sensor is sealed and connected with the sensor mounting hole.

[0012] Based on the above, a plurality of third countersunk holes for installing third countersunk screws are provided on the front end cover of the oil cylinder, a first straight sleeve is integrally formed in the middle of the front end surface of the front end cover of the oil cylinder, a plurality of third threaded blind holes arranged in a circumferential array are provided at the front end of the first straight sleeve, each second countersunk hole corresponds to each third threaded blind hole one by one front and back, each second countersunk screw is respectively correspondingly installed in each second countersunk hole and threadedly installed in each corresponding third threaded blind hole, a second dustproof groove, two second support ring grooves and a fifth sealing ring groove are spaced apart from each other on the inner circle of the first straight sleeve, the fifth sealing ring groove is located between the two second support ring grooves, and a A second dust ring is mounted on the deep hole piston rod and slidingly cooperates with the deep hole piston rod, a second support ring is mounted on the deep hole piston rod and slidingly cooperates with the deep hole piston rod in the second support ring groove, a fifth sealing ring is mounted on the deep hole piston rod and sealingly and slidingly cooperates with the deep hole piston rod in the fifth sealing ring groove, a second straight shaft sleeve is integrally formed with the middle part of the rear end surface of the front end cover of the oil cylinder, the second straight shaft sleeve is coaxially inserted in the front port of the oil cylinder barrel, the outer circle of the second straight shaft sleeve is tightly fitted with the inner circle of the oil cylinder barrel, a seventh sealing ring groove is opened on the outer circle of the second straight shaft sleeve, and a seventh sealing ring is installed in the seventh sealing ring groove to seal and contact with the inner circle of the oil cylinder barrel.

[0013] Based on the above, a plurality of fourth countersunk holes for installing fourth countersunk screws are provided on the rear end cover of the oil cylinder, and a third straight shaft sleeve is integrally formed in the middle of the front end surface of the rear end cover of the oil cylinder. The third straight shaft sleeve is coaxially inserted in the rear port of the oil cylinder barrel, and the outer circle of the third straight shaft sleeve is tightly fitted with the inner circle of the oil cylinder barrel. An eighth sealing ring groove is provided on the outer circle of the third straight shaft sleeve, and an eighth sealing ring is installed in the eighth sealing ring groove to seal in contact with the inner circle of the oil cylinder barrel.

[0014] The utility model has substantial characteristics and progress compared with the prior art. Specifically, the beneficial effects of the utility model are as follows: the utility model improves the existing hydraulic locking structure of the elevation hydraulic cylinder, an elastic locking sleeve is arranged in the locking cylinder, a deep-hole piston rod coaxially passes through the elastic locking sleeve, a pressure-bearing ring groove is arranged on the middle outer circle of the elastic locking sleeve, the outer circles of the two end portions of the elastic locking sleeve are tightly fitted with the inner circle of the locking cylinder, a pressure-bearing oil chamber is formed between the pressure-bearing ring groove and the inner circle of the locking cylinder, a first liquid through hole is arranged on the middle cylinder wall of the locking cylinder, and the first liquid through hole is connected to the pressure-bearing oil chamber When working, in the initial stage, there is a gap between the middle inner circle of the elastic locking sleeve and the deep hole piston rod, and the deep hole piston rod can extend and retract normally. When the deep hole piston rod needs to be locked, the high-pressure oil is introduced into the first liquid hole, and the high-pressure oil enters the pressure-bearing oil chamber to make the middle part of the elastic locking sleeve elastically deformed by force. The middle inner circle of the elastic locking sleeve is in tight contact with the deep hole piston rod and locks the deep hole piston rod by friction to complete the locking of the hydraulic cylinder. The stress surface and deformation of the elastic locking sleeve are relatively uniform, the deep hole piston rod is firmly locked, the locking effect is better, and the structure is simple. When the high-pressure oil introduced into the first liquid hole is unloaded, the elastic locking sleeve is deformed and restored, and the locking of the deep hole piston rod is released, that is, the locking of the hydraulic cylinder is cancelled. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an existing elevation hydraulic cylinder.

[0016] Figure 2 It is a structural schematic diagram of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the elastic locking sleeve of the utility model.

[0018] Figure 4 It is a structural schematic diagram of the locking front end cover of the utility model.

[0019] Figure 5 It is a structural schematic diagram of the locking cylinder of the utility model.

[0020] Figure 6 It is an axonometric view of the locking rear end cover of the utility model.

[0021] Figure 7It is a structural schematic diagram of the connecting end plate of the utility model.

[0022] Figure 8 It is a structural schematic diagram of the front end cover of the oil cylinder of the utility model.

[0023] Fig. 9 It is a structural schematic diagram of the rear end cover of the oil cylinder of the utility model.

[0024] In the figure: 1. deep hole piston rod; 2. first liquid inlet hole; 3. first piston; 4. locking sleeve; 69. second liquid inlet hole; 5. locking front end cover; 6. locking cylinder; 7. locking rear end cover; 8. elastic locking sleeve; 9. connecting end plate; 10. first liquid through hole; 11. pressure ring groove; 12. pressure oil chamber; 13. step groove; 14. first threaded blind hole; 15. second threaded blind hole; 16. first countersunk screw; 17. first countersunk hole; 18. first First step sleeve; 19. First step surface; 20. First sealing ring groove; 21. First sealing ring; 22. Second sealing ring groove; 23. Second sealing ring; 24. First dustproof groove; 25. First support ring groove; 26. First dustproof ring; 27. First support ring; 28. First fastening screw; 29. ​​First light hole; 30. Second light hole; 31. Second step sleeve; 32. Second step surface; 33. Third sealing ring groove; 34. Third sealing ring; 35. Fourth sealing ring groove; 36. Fourth sealing ring; 37. Second countersunk hole; 38. Second countersunk screw; 39. Front cover of oil cylinder; 40. Cylinder barrel; 41. Rear cover of oil cylinder; 42. Displacement sensor; 43. Flange; 44. Third countersunk screw; 45. Fourth countersunk screw; 46. Second piston; 47. Sixth sealing ring; 48. Third support ring; 49. Second liquid hole; 50. Third liquid hole; 51. Shield; 52. Sensor Device mounting hole; 53. third countersunk hole; 54. first straight shaft sleeve; 55. third threaded blind hole; 56. second dustproof groove; 57. second support ring groove; 58. fifth sealing ring groove; 59. second dustproof ring; 60. second support ring; 61. fifth sealing ring; 62. second straight shaft sleeve; 63. seventh sealing ring groove; 64. seventh sealing ring; 65. fourth countersunk hole; 66. third straight shaft sleeve; 67. eighth sealing ring groove; 68. eighth sealing ring. DETAILED DESCRIPTION

[0025] The technical solution of the utility model is further described in detail below through specific implementation methods.

[0026] like Figure 2-9As shown, a new type of rolling line elevation adjustment hydraulic cylinder comprises a locking front end cover 5, a locking cylinder barrel 6, a locking rear end cover 7, an elastic locking sleeve 8, a deep hole piston rod 1 and a hydraulic cylinder body. The locking front end cover 5 is connected to the front end of the locking cylinder barrel 6, the locking rear end cover 7 is connected to the rear end of the locking cylinder barrel 6, and a connecting end plate 9 is provided between the locking rear end cover 7 and the front end of the hydraulic cylinder body. The connecting end plate 9 is respectively connected to the locking rear end cover 7 and the front end of the hydraulic cylinder body. The elastic locking sleeve 8 is connected to the locking rear end cover 7 and the front end of the hydraulic cylinder body. The shaft is installed in the locking cylinder 6, and the two ends of the elastic locking sleeve 8 are respectively in tight and sealing contact with the locking front end cover 5 and the locking rear end cover 7. A first liquid hole 10 is provided on the middle wall of the locking cylinder 6. The deep hole piston rod 1 extends from the front end of the hydraulic cylinder body and coaxially passes through the connecting end plate 9, the locking rear end cover 7, the elastic locking sleeve 8 and the locking front end cover 5. The deep hole piston rod 1 is slidably connected with the connecting end plate 9, the locking rear end cover 7, the elastic locking sleeve 8 and the locking front end cover 5.

[0027] A pressure-bearing ring groove 11 is provided on the outer circle of the middle part of the elastic locking sleeve 8, and the outer circles of the two end parts of the elastic locking sleeve 8 are tightly fitted with the inner circle of the locking cylinder 6. A pressure-bearing oil chamber 12 is formed between the pressure-bearing ring groove 11 and the inner circle of the locking cylinder 6. The first liquid hole 10 is connected with the pressure-bearing oil chamber 12. There is a gap between the middle inner circle of the elastic locking sleeve 8 and the deep-hole piston rod 1. Step grooves 13 are provided on the inner circles of the two end parts of the elastic locking sleeve 8. A plurality of first threaded blind holes 14 arranged in a circumferential array are provided at the front end of the locking cylinder 6, and a plurality of second threaded blind holes 15 arranged in a circumferential array are provided at the rear end of the locking cylinder 6.

[0028] The locking front end cover 5 is connected to the front end of the locking cylinder 6 by a plurality of first countersunk screws 16. A plurality of first countersunk holes 17 arranged in a circumferential array are provided on the front end surface of the locking front end cover 5. Each first countersunk hole 17 corresponds to each first threaded blind hole 14 one by one front and back. Each first countersunk screw 16 is respectively arranged in each first countersunk hole 17 and threadedly installed in each corresponding first threaded blind hole 14. A first stepped sleeve 18 is integrally formed on the inner edge of the middle part of the rear end surface of the locking front end cover 5 and is located in the middle of each first countersunk hole 17 and is thick in front and thin in the back. A first step surface 19 is formed at the connection between the front thick sleeve and the rear thin sleeve of the first stepped sleeve 18. The first stepped sleeve 18 is coaxially inserted into the front port of the locking cylinder 6. The outer circle of the front thick sleeve of the first stepped sleeve 18 The outer circle of the front thick sleeve of the first stepped sleeve 18 is provided with a first sealing ring groove 20, and a first sealing ring 21 sealingly contacting with the inner circle of the locking cylinder 6 is installed in the first sealing ring groove 20. The rear thin sleeve of the first stepped sleeve 18 is coaxially inserted in the front step groove 13, and the outer circle of the rear thin sleeve of the first stepped sleeve 18 is tightly fitted with the inner circle of the front step groove 13. The rear end of the rear thin sleeve of the first stepped sleeve 18 is pressed in contact with the bottom of the front step groove 13, and the front end of the elastic locking sleeve 8 is pressed in contact with the first step surface 19. The outer circle of the rear thin sleeve of the first stepped sleeve 18 is provided with a second sealing ring groove 22, and a second sealing ring 23 sealingly contacting with the inner circle of the front step groove 13 is installed in the second sealing ring groove 22.

[0029] The inner circle of the locking front end cover 5 is provided with a first dustproof groove 24 and two first support ring grooves 25 at intervals in the front and rear. The first dustproof groove 24 is provided with a first dustproof ring 26 which is sleeved on the deep hole piston rod 1 and slides with the deep hole piston rod 1. The first support ring groove 25 is provided with a first support ring 27 which is sleeved on the deep hole piston rod 1 and slides with the deep hole piston rod 1.

[0030] The locking rear end cover 7 is connected to the rear end of the locking cylinder 6 and the connecting end plate 9 through a plurality of first fastening screws 28. A plurality of first light holes 29 arranged in a circumferential array are provided on the locking rear end cover 7. A plurality of second light holes 30 arranged in a circumferential array are provided at the outer edge of the connecting end plate 9. Each second light hole 30, each first light hole 29 and each second threaded blind hole 15 correspond to each other front to back. Each first fastening screw 28 passes through the corresponding second light hole 30 and the first light hole 29 respectively and is threadedly installed in the corresponding second threaded blind hole 15. A second stepped shaft sleeve 31, which is located in the middle of each first light hole 29 and is thin in front and thick in the back, is integrally formed on the inner edge of the middle part of the front end face of the locking rear end cover 7. A second step surface 32 is formed at the connection between the front thin shaft sleeve and the rear thick shaft sleeve of the second stepped shaft sleeve 31. The second stepped shaft sleeve 31 is coaxially plugged into the locking In the rear port of the locking cylinder 6, the outer circle of the rear section thick sleeve of the second stepped sleeve 31 is tightly fitted with the inner circle of the locking cylinder 6, and a third sealing ring groove 33 is provided on the outer circle of the rear section thick sleeve of the second stepped sleeve 31, and a third sealing ring 34 is installed in the third sealing ring groove 33 for sealing contact with the inner circle of the locking cylinder 6, and the front section thin sleeve of the second stepped sleeve 31 is coaxially inserted in the step groove 13 on the rear side, and the outer circle of the front section thin sleeve of the second stepped sleeve 31 is tightly fitted with the inner circle of the step groove 13 on the rear side, and the front end of the front section thin sleeve of the second stepped sleeve 31 is pressed in contact with the bottom of the step groove 13 on the rear side, and the rear end of the elastic locking sleeve 8 is pressed in contact with the second step surface 32, and a fourth sealing ring groove 35 is provided on the outer circle of the front section thin sleeve of the second stepped sleeve 31, and a fourth sealing ring 36 is installed in the fourth sealing ring groove 35 for sealing contact with the inner circle of the step groove 13 on the rear side.

[0031] A plurality of second countersunk holes 37 are formed in a circumferential array at the inner edge of the middle portion of the front end surface of the connecting end plate 9 . The connecting end plate 9 is connected to the front end of the hydraulic cylinder body through a plurality of second countersunk screws 38 respectively installed in each second countersunk hole 37 .

[0032] The hydraulic cylinder body includes a front end cover 39 of the cylinder, a cylinder barrel 40, a rear end cover 41 of the cylinder and a displacement sensor 42. The outer circles of the two ends of the cylinder barrel 40 are provided with external threads and are respectively threaded with flanges 43. The front end cover 39 of the cylinder is connected to the front flange 43 by a plurality of third countersunk screws 44 arranged in a circumferential array, and the rear end cover 41 of the cylinder is connected to the rear flange 43 by a plurality of fourth countersunk screws 45 arranged in a circumferential array. A second piston 46 coaxially slidably arranged in the cylinder barrel 40 is fixedly installed at the inner end of the deep-hole piston rod 1. A sixth sealing ring groove and two third support ring grooves spaced front and rear are provided on the outer circumference of the second piston 46. The sixth sealing ring groove is located between the two third support ring grooves. A sixth sealing ring 47 is installed in the sixth sealing ring groove, which is in sealing and sliding contact with the inner circle of the cylinder barrel 40. The third support ring A third support ring 48 is installed in the groove, which is in sliding contact with the inner circle of the cylinder barrel 40. A second liquid hole 49 is opened on the side wall of the front end cover 39 of the cylinder, which is connected to the inner cavity of the cylinder barrel 40 and is located in front of the second piston 46. A third liquid hole 50 is opened on the side wall of the rear end cover 41 of the cylinder, which is connected to the inner cavity of the cylinder barrel 40 and is located behind the second piston 46. A shield 51 is connected to the middle part of the rear end surface of the rear end cover 41 of the cylinder by a plurality of second fastening screws. The displacement sensor 42 is arranged in the shield 51 and fixedly installed at the center of the rear end surface of the rear end cover 41 of the cylinder. A sensor mounting hole 52 is provided in the center of the rear end cover 41 of the cylinder. The detection part of the displacement sensor 42 extends into the cylinder barrel 40 through the sensor mounting hole 52 and is connected with the deep hole piston rod 1. The detection part of the displacement sensor 42 is sealed and connected with the sensor mounting hole 52.

[0033] The front end cover 39 of the oil cylinder is provided with a plurality of third countersunk holes 53 for installing the third countersunk screws 44. A first straight sleeve 54 is integrally formed in the middle of the front end surface of the oil cylinder front end cover 39. A plurality of third threaded blind holes 55 arranged in a circumferential array are provided at the front end of the first straight sleeve 54. Each second countersunk hole 37 corresponds to each third threaded blind hole 55 one by one front and back. Each second countersunk screw 38 is respectively arranged in each second countersunk hole 37 and threadedly installed in each corresponding third threaded blind hole 55. A second dustproof groove 56, two second support ring grooves 57 and a fifth sealing ring groove 58 are spaced apart on the inner circle of the first straight sleeve 54. The fifth sealing ring groove 58 is located between the two second support ring grooves 57. A set of sealing rings 58 is installed in the second dustproof groove 56. A second dust ring 59 is on the deep hole piston rod 1 and slides with the deep hole piston rod 1, a second support ring 60 is installed in the second support ring groove 57, and a fifth sealing ring 61 is installed in the fifth sealing ring groove 58, which is mounted on the deep hole piston rod 1 and seals and slides with the deep hole piston rod 1. A second straight shaft sleeve 62 is integrally formed in the middle of the rear end surface of the cylinder front end cover 39, and the second straight shaft sleeve 62 is coaxially inserted in the front port of the cylinder barrel 40. The outer circle of the second straight shaft sleeve 62 is tightly fitted with the inner circle of the cylinder barrel 40. A seventh sealing ring groove 63 is opened on the outer circle of the second straight shaft sleeve 62, and a seventh sealing ring groove 63 is installed with a seventh sealing ring 64 that is in sealing contact with the inner circle of the cylinder barrel 40.

[0034] A plurality of fourth countersunk holes 65 for installing fourth countersunk screws 45 are provided on the rear end cover 41 of the oil cylinder. A third straight shaft sleeve 66 is integrally formed in the middle of the front end surface of the rear end cover 41 of the oil cylinder. The third straight shaft sleeve 66 is coaxially inserted in the rear port of the oil cylinder barrel 40. The outer circle of the third straight shaft sleeve 66 is tightly fitted with the inner circle of the oil cylinder barrel 40. An eighth sealing ring groove 67 is provided on the outer circle of the third straight shaft sleeve 66. An eighth sealing ring 68 is installed in the eighth sealing ring groove 67 to seal the inner circle of the oil cylinder barrel 40.

[0035] The hydraulic cylinder body is an existing hydraulic cylinder in the art, and the specific structure and working principle are not described in detail. The first sealing ring 21, the second sealing ring 23, the first dust ring 26, the first support ring 27, the third sealing ring 34, the fourth sealing ring 36, the displacement sensor 42, the sixth sealing ring 47, the third support ring 48, the second dust ring 59, the second support ring 60, the fifth sealing ring 61, the seventh sealing ring 64 and the eighth sealing ring 68 are all existing technologies and can be purchased on the market, and the specific structure and working principle are not described in detail.

[0036] The utility model improves the existing hydraulic locking structure of the elevation hydraulic cylinder. An elastic locking sleeve 8 is arranged in the locking cylinder 6. The deep-hole piston rod 1 coaxially passes through the elastic locking sleeve 8. A pressure-bearing ring groove 11 is arranged on the outer circle of the middle part of the elastic locking sleeve 8. The outer circles of the two end parts of the elastic locking sleeve 8 are tightly fitted with the inner circle of the locking cylinder 6. A pressure-bearing oil chamber 12 is formed between the pressure-bearing ring groove 11 and the inner circle of the locking cylinder 6. A first liquid hole 10 is arranged on the wall of the middle part of the locking cylinder 6. The first liquid hole 10 is connected with the pressure-bearing oil chamber 12. When working, in the initial stage, the elastic locking sleeve 8 There is a gap between the middle inner circle and the deep hole piston rod 1, and the deep hole piston rod 1 can extend and retract normally. When the deep hole piston rod 1 needs to be locked, the first liquid hole 10 is passed through high-pressure oil, and the high-pressure oil enters the pressure-bearing oil chamber 12 to make the middle part of the elastic locking sleeve 8 elastically deformed by force. The middle inner circle of the elastic locking sleeve 8 is pressed and contacted with the deep hole piston rod 1 and locks the deep hole piston rod 1 by friction, completing the locking of the hydraulic cylinder. The stress surface and deformation of the elastic locking sleeve 8 are relatively uniform, the deep hole piston rod 1 is firmly locked, the locking effect is better, and the structure is simple. When the high-pressure oil pressure passed through the first liquid hole 10 is unloaded, the elastic locking sleeve 8 is deformed and restored, and the locking of the deep hole piston rod 1 is released, that is, the locking of the hydraulic cylinder is cancelled.

[0037] When the utility model is specifically applied to the composite adjustment device (existing technology) of the combination of the inclined wedge and the stepped pad to adjust and compensate the rolling line, the first new rolling line elevation adjustment hydraulic cylinder is first used to push the stepped pad to adjust the rolling line. The specific operation is: firstly, high-pressure oil is introduced into the third liquid hole 50, the deep hole piston rod 1 extends forward, and the outer end of the deep hole piston rod 1 pushes the stepped pad to complete the rough adjustment, and then the high-pressure oil introduced into the third liquid hole 50 is unloaded, and at the same time, the high-pressure oil introduced into the first liquid hole 10 is pushed forward. High-pressure oil is introduced, and the high-pressure oil enters the pressure-bearing oil chamber 12 to make the middle part of the elastic locking sleeve 8 elastically deformed by force. The middle inner circle of the elastic locking sleeve 8 is pressed and contacted with the deep-hole piston rod 1 to generate a certain friction force, locking the deep-hole piston rod 1, completing the locking of the new rolling line elevation adjustment hydraulic cylinder, so that the step pad is fixed in position to prevent misoperation; then, the second new rolling line elevation adjustment hydraulic cylinder is used to push the inclined wedge block for stepless fine adjustment of the rolling line. The specific operation process is the same as the above-mentioned rough adjustment. Finally, when it is necessary to replace the rollers, etc., the high-pressure oil introduced into the first liquid hole 10 is unloaded, and the locking of the new rolling line elevation adjustment hydraulic cylinder is canceled. At the same time, high-pressure oil is introduced into the corresponding second liquid hole 49 to retract the corresponding deep-hole piston rod 1 and re-adjust the rolling line.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A new type of rolling line elevation adjustment hydraulic cylinder, characterized by: It includes a locking front end cover, a locking cylinder, a locking rear end cover, an elastic locking sleeve, a deep-hole piston rod and a hydraulic cylinder body. The locking front end cover is connected to the front end of the locking cylinder, and the locking rear end cover is connected to the rear end of the locking cylinder. A connecting end plate is provided between the locking rear end cover and the front end of the hydraulic cylinder body. The connecting end plates are respectively connected to the locking rear end cover and the front end of the hydraulic cylinder body. The elastic locking sleeve is coaxially installed in the locking cylinder. The two ends of the elastic locking sleeve are respectively in tight and sealing contact with the locking front end cover and the locking rear end cover. A first liquid hole is provided on the middle wall of the locking cylinder. The deep-hole piston rod extends from the front end of the hydraulic cylinder body and coaxially passes through the connecting end plate, the locking rear end cover, the elastic locking sleeve and the locking front end cover. The deep-hole piston rod is slidably connected to the connecting end plate, the locking rear end cover, the elastic locking sleeve and the locking front end cover.

2. The new rolling line elevation adjustment hydraulic cylinder according to claim 1 is characterized in that: A pressure-bearing ring groove is provided on the outer circle of the middle part of the elastic locking sleeve, and the outer circles of the two end parts of the elastic locking sleeve are tightly fitted with the inner circle of the locking cylinder. A pressure-bearing oil chamber is formed between the pressure-bearing ring groove and the inner circle of the locking cylinder. The first liquid hole is connected with the pressure-bearing oil chamber. There is a gap between the inner circle of the middle part of the elastic locking sleeve and the deep-hole piston rod. The inner circles of the two end parts of the elastic locking sleeve are provided with step grooves. The front end of the locking cylinder is provided with a plurality of first threaded blind holes arranged in a circumferential array, and the rear end of the locking cylinder is provided with a plurality of second threaded blind holes arranged in a circumferential array.

3. The new rolling line elevation adjustment hydraulic cylinder according to claim 2 is characterized in that: The locking front end cover is connected to the front end of the locking cylinder through a plurality of first countersunk screws. A plurality of first countersunk holes arranged in a circumferential array are provided on the front end surface of the locking front end cover. Each first countersunk hole corresponds to each first threaded blind hole one by one front and back. Each first countersunk screw is respectively installed in each first countersunk hole and threadedly installed in each corresponding first threaded blind hole. A first stepped sleeve located in the middle of each first countersunk hole and having a thickness in the front and a thickness in the rear is integrally formed on the inner edge of the middle part of the rear end surface of the locking front end cover. A first step surface is formed at the connection between the front thick sleeve and the rear thin sleeve of the first stepped sleeve. The first stepped sleeve is coaxially inserted into the front port of the locking cylinder. The front thick sleeve of the first stepped sleeve The outer circle fits tightly with the inner circle of the locking cylinder, a first sealing ring groove is provided on the outer circle of the front thick sleeve of the first stepped sleeve, a first sealing ring is installed in the first sealing ring groove, the rear thin sleeve of the first stepped sleeve is coaxially inserted in the step groove on the front side, the outer circle of the rear thin sleeve of the first stepped sleeve fits tightly with the inner circle of the step groove on the front side, the rear end of the rear thin sleeve of the first stepped sleeve is pressed in contact with the bottom of the step groove on the front side, the front end of the elastic locking sleeve is pressed in contact with the first step surface, a second sealing ring groove is provided on the outer circle of the rear thin sleeve of the first stepped sleeve, a second sealing ring groove is installed in the second sealing ring groove, a second sealing ring is in sealing contact with the inner circle of the step groove on the front side; The inner circle of the locking front end cover is provided with a first dustproof groove and two first support ring grooves spaced apart at front and rear. The first dustproof groove is provided with a first dustproof ring which is mounted on the deep hole piston rod and slides with the deep hole piston rod. The first support ring groove is provided with a first support ring which is mounted on the deep hole piston rod and slides with the deep hole piston rod.

4. The new rolling line elevation adjustment hydraulic cylinder according to claim 2 is characterized in that: The locking rear end cover is connected to the rear end of the locking cylinder and the connecting end plate through a plurality of first fastening screws, the locking rear end cover is provided with a plurality of first light holes arranged in a circumferential array, and a plurality of second light holes arranged in a circumferential array are provided at the outer edge of the connecting end plate, each second light hole, each first light hole and each second threaded blind hole respectively correspond to each other front to back, each first fastening screw respectively passes through the corresponding second light hole and the first light hole and is threadedly installed in the corresponding second threaded blind hole, the inner edge of the middle part of the front end face of the locking rear end cover is integrally formed with a second stepped shaft sleeve which is located in the middle of each first light hole and is thin in front and thick in the back, a second step surface is formed at the connection between the front thin shaft sleeve and the rear thick shaft sleeve, and the second stepped shaft sleeve is coaxially plugged in In the rear port of the locking cylinder, the outer circle of the rear section thick sleeve of the second stepped sleeve is tightly fitted with the inner circle of the locking cylinder, and a third sealing ring groove is provided on the outer circle of the rear section thick sleeve of the second stepped sleeve, in which a third sealing ring is installed for sealing contact with the inner circle of the locking cylinder, and the front section thin sleeve of the second stepped sleeve is coaxially inserted in the step groove on the rear side, and the outer circle of the front section thin sleeve of the second stepped sleeve is tightly fitted with the inner circle of the step groove on the rear side, and the front end of the front section thin sleeve of the second stepped sleeve is pressed in contact with the bottom of the step groove on the rear side, and the rear end of the elastic locking sleeve is pressed in contact with the second step surface, and a fourth sealing ring groove is provided on the outer circle of the front section thin sleeve of the second stepped sleeve, in which a fourth sealing ring is installed for sealing contact with the inner circle of the step groove on the rear side.

5. The new rolling line elevation adjustment hydraulic cylinder according to any one of claims 1 to 4, characterized in that: A plurality of second countersunk holes in a circumferential array are provided at the inner edge of the middle portion of the front end surface of the connecting end plate, and the connecting end plate is connected to the front end of the hydraulic cylinder body through a plurality of second countersunk screws respectively installed in the second countersunk holes.

6. The novel rolling line elevation adjustment hydraulic cylinder according to claim 5 is characterized in that: The hydraulic cylinder body comprises a front end cover of the oil cylinder, a cylinder barrel, a rear end cover of the oil cylinder and a displacement sensor. The outer circles of the two ends of the oil cylinder barrel are provided with external threads and are respectively threadedly connected with flanges. The front end cover of the oil cylinder is connected to the flange on the front side by a plurality of third countersunk screws arranged in a circumferential array. The rear end cover of the oil cylinder is connected to the flange on the rear side by a plurality of fourth countersunk screws arranged in a circumferential array. The inner end of the deep-hole piston rod is fixedly installed with a second piston coaxially slidably arranged in the oil cylinder barrel. The outer circumference of the second piston is provided with a sixth sealing ring groove and two third supporting ring grooves spaced front and rear. The sixth sealing ring groove is located between the two third supporting ring grooves. The sixth sealing ring groove is provided with a sixth sealing ring in sealing and sliding contact with the inner circle of the oil cylinder barrel. A third support ring is installed in the third support ring groove, which is in sliding contact with the inner circle of the cylinder barrel. A second liquid hole that is connected to the inner cavity of the cylinder barrel and is located in front of the second piston is opened on the side wall of the front end cover of the cylinder. A third liquid hole that is connected to the inner cavity of the cylinder barrel and is located on the rear side of the second piston is opened on the side wall of the rear end cover of the cylinder. A shield is connected to the middle part of the rear end surface of the rear end cover of the cylinder through a plurality of second fastening screws. A displacement sensor is arranged in the shield and fixedly installed at the center of the rear end surface of the rear end cover of the cylinder. A sensor mounting hole is provided in the center of the rear end cover of the cylinder. The detection part of the displacement sensor extends into the cylinder barrel through the sensor mounting hole and is connected in cooperation with the deep hole piston rod. The detection part of the displacement sensor is sealed and connected to the sensor mounting hole.

7. The new rolling line elevation adjustment hydraulic cylinder according to claim 6 is characterized in that: The front end cover of the oil cylinder is provided with a plurality of third countersunk holes for installing third countersunk screws, a first straight sleeve is integrally formed in the middle of the front end surface of the front end cover of the oil cylinder, a plurality of third threaded blind holes arranged in a circumferential array are provided at the front end of the first straight sleeve, each second countersunk hole corresponds to each third threaded blind hole one by one front and back, each second countersunk screw is respectively correspondingly installed in each second countersunk hole and threadedly installed in each corresponding third threaded blind hole, a second dustproof groove, two second support ring grooves and a fifth sealing ring groove are spaced apart from each other on the inner circle of the first straight sleeve, the fifth sealing ring groove is located between the two second support ring grooves, and a set is installed in the second dustproof groove A second dust ring is on the deep hole piston rod and slides with the deep hole piston rod, a second support ring groove is installed with a second support ring which is sleeved on the deep hole piston rod and slides with the deep hole piston rod, a fifth sealing ring is installed in the fifth sealing ring groove, which is sleeved on the deep hole piston rod and slides with the deep hole piston rod in a sealing manner, a second straight shaft sleeve is integrally formed with the middle of the rear end surface of the front end cover of the oil cylinder, the second straight shaft sleeve is coaxially inserted in the front port of the oil cylinder barrel, the outer circle of the second straight shaft sleeve is tightly fitted with the inner circle of the oil cylinder barrel, a seventh sealing ring groove is opened on the outer circle of the second straight shaft sleeve, and a seventh sealing ring is installed in the seventh sealing ring groove to seal and contact with the inner circle of the oil cylinder barrel.

8. The novel rolling line elevation adjustment hydraulic cylinder according to claim 6 is characterized in that: A plurality of fourth countersunk holes for installing fourth countersunk screws are provided on the rear end cover of the oil cylinder. A third straight shaft sleeve is integrally formed in the middle of the front end surface of the rear end cover of the oil cylinder. The third straight shaft sleeve is coaxially inserted in the rear port of the oil cylinder barrel. The outer circle of the third straight shaft sleeve is tightly fitted with the inner circle of the oil cylinder barrel. An eighth sealing ring groove is provided on the outer circle of the third straight shaft sleeve. An eighth sealing ring is installed in the eighth sealing ring groove to seal in contact with the inner circle of the oil cylinder barrel.

Images