Rotary oil cylinder device for casting and rolling machine
By using the design of two-way thrust ball bearings, connecting sleeves and connecting flange devices in the casting and rolling mill cylinder, the hydraulic oil leakage problem caused by rotary joints in the prior art is solved, and higher production safety and cylinder stability are achieved.
Patent Information
- Application Number
- CN202420991047.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-05-09
AI Technical Summary
During long-term use, existing casting and rolling mill oil cylinders are prone to leakage of hydraulic oil due to rotary joints, causing pressure relief risks and affecting production safety.
A rotating oil cylinder device for casting and rolling mill is designed, using a bidirectional thrust ball bearing, connecting sleeve and connecting flange device, and canceling the rotary joint to ensure that the shrinking reel only rotates inside the connecting flange, and improving the stability and sealing of the oil cylinder through the shrinking oil cylinder.
It effectively eliminates the pressure relief risk caused by rotary joints, improves safety performance during production, reduces the occurrence of hydraulic oil leakage, reduces the risk of leakage, and improves overall safety.
Smart Images
Figure CN222607598U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil cylinders, in particular to a rotary oil cylinder device for a casting and rolling mill. Background Art
[0002] At present, the oil cylinder of the casting and rolling machine is an indispensable component on the reel as the power source for the expansion and contraction of the reel. In the prior art, the oil cylinder is installed on a high-speed rotating reel. In order to prevent the oil cylinder from rotating with the reel, a rotary joint device is required to supply oil to the oil cylinder to achieve the reciprocating expansion and contraction of the reel. However, it is found during long-term use that due to the use of the rotary joint, the oil cylinder often leaks hydraulic oil, causing a risk of pressure relief, affecting the production activities of the workshop, and having low safety performance.
[0003] Therefore, it is urgent to design a rotary cylinder device for a casting and rolling mill to solve the above problems. Utility Model Content
[0004] The purpose of the utility model is to provide a rotary cylinder device for a casting and rolling mill. The utility model can cancel the design of the rotary joint device in the prior art through the design of a bidirectional thrust ball bearing, a connecting sleeve and a connecting flange device, which not only meets the requirement that the expansion and contraction reel only rotates inside the connecting flange device and does not drive the expansion and contraction cylinder to rotate, but also eliminates the risk of pressure relief caused by the use of a rotary joint in the prior art, thereby improving the safety performance in the production process; and the use of an expansion and contraction cylinder makes the cylinder more stable during operation, reduces the occurrence of hydraulic oil leakage, greatly reduces the risk of leakage, and improves safety.
[0005] In order to solve the above technical problems, the utility model provides a rotary cylinder device for a casting and rolling mill, the rotary cylinder device comprises a connecting flange device and an expansion and contraction cylinder, the connecting flange device comprises an outer cylinder and an inner cylinder arranged in sequence from the outside to the inside, the two ends of the outer cylinder are respectively fixed to the casting and rolling mill and the expansion and contraction cylinder, the expansion and contraction reel of the casting and rolling mill is inserted into the inner cylinder and a bidirectional thrust ball bearing is arranged between the expansion and contraction reel and the inner cylinder, and the bidirectional thrust ball bearing is sleeved on the expansion and contraction reel;
[0006] The expansion and contraction cylinder includes a piston rod, which extends into the outer cylinder and is fixedly connected to the inner cylinder through a connecting sleeve. A gap is provided between the piston rod and the expansion and contraction reel, and the piston rod drives the connecting sleeve, the inner cylinder and the expansion and contraction reel to move in the outer cylinder.
[0007] Furthermore, a guide sleeve 1 is provided between the outer cylinder and the inner cylinder, the guide sleeve 1 is fixedly connected to the inner wall of the outer cylinder, a sliding sleeve is embedded on the outer side of the inner cylinder, and the sliding sleeve is slidably connected to the guide sleeve 1.
[0008] Furthermore, a shaft sleeve is provided on the expansion and contraction reel, a threaded sleeve is provided on one side of the shaft sleeve, the threaded sleeve is screwed on the end of the expansion and contraction reel and locked by a fastener, and the threaded sleeve presses the shaft sleeve onto the inner ring of the bidirectional thrust ball bearing.
[0009] Furthermore, a gasket is provided between the threaded sleeve and the shaft sleeve.
[0010] Furthermore, the expansion and contraction cylinder also includes a piston, a cylinder barrel, and a cylinder head 1 and a cylinder head 2 arranged at both ends of the cylinder barrel. The piston is arranged in the cylinder barrel and connected to the piston rod. Cavity 1 and cavity 2 are respectively provided between the piston and the cylinder head 1 and the cylinder head 2. An oil circuit 1 is opened on the cylinder head 1, and the oil circuit 1 is connected to the cavity 1. An oil circuit 2 is opened on the cylinder head 2, and the oil circuit 2 is connected to the cavity 2.
[0011] Furthermore, the cylinder head 1 is fixed to the cylinder barrel via fasteners, the cylinder head 1 is fixed to the outer barrel via bolts and nuts, and the cylinder head 2 is fixed to the cylinder barrel via fasteners.
[0012] Furthermore, a guide sleeve 2 is provided between the cylinder cover 1 and the piston rod, the guide sleeve 2 is fixedly connected to the cylinder cover 1, and a plurality of sealing rings are provided between the guide sleeve 2 and the piston rod.
[0013] Furthermore, sealing members are provided between the inner wall of the cylinder barrel and the cylinder head 1 and the cylinder head 2 respectively.
[0014] Furthermore, the guide sleeve 1 is fixed to the inner wall of the outer cylinder by welding.
[0015] Furthermore, the outer diameter of the sliding sleeve is greater than the outer diameters of the inner tube and the connecting sleeve.
[0016] The beneficial effects of the utility model are:
[0017] 1. The utility model can eliminate the design of the rotary joint device in the prior art through the design of the bidirectional thrust ball bearing, the connecting sleeve and the connecting flange device, meet the requirement that the expansion and contraction reel only rotates inside the connecting flange device and does not drive the expansion and contraction cylinder to rotate, eliminate the risk of pressure relief caused by the use of a rotary joint in the prior art, and improve the safety performance in the production process; and the use of the expansion and contraction cylinder makes the cylinder more stable during operation, reduces the occurrence of hydraulic oil leakage, greatly reduces the risk of leakage, and improves safety.
[0018] 2. The utility model can avoid friction between the inner tube and the connecting sleeve and the outer tube by designing that the outer diameter of the sliding sleeve is larger than the outer diameter of the inner tube and the connecting sleeve, thereby reducing working energy consumption. In this embodiment, the guide sleeve 1 is fixed to the inner wall of the outer tube by welding, and the strength and reliability of the fixed part can be ensured by welding.
[0019] 3. In the utility model, a sleeve is provided on the expansion and contraction reel, and a threaded sleeve is provided on one side of the sleeve. The threaded sleeve is screwed on the end of the expansion and contraction reel and locked by a fastener. The threaded sleeve presses the sleeve onto the inner ring of the bidirectional thrust ball bearing. This design facilitates the piston rod to synchronously drive the connecting sleeve, the inner cylinder, the bidirectional thrust ball bearing, the sleeve and the threaded sleeve to perform telescopic movement when the piston rod is extended and retracted, thereby improving the overall performance and working stability.
[0020] 4. The utility model can be used to support and ensure the coaxiality of the piston rod through the design of the guide sleeve 2, ensure the stability and accuracy of the piston rod during movement, and through the design of the sealing ring, improve the sealing performance, reduce the occurrence of hydraulic oil leakage, greatly reduce the risk of leakage, and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0022] Figure 1 It is a structural schematic diagram of a rotary cylinder device for a casting and rolling mill of the utility model;
[0023] In the figure: 1-connecting flange device, 2-expansion and contraction oil cylinder, 3-casting and rolling mill, 4-bidirectional thrust ball bearing, 5-connecting sleeve, 6-shaft sleeve, 7-threaded sleeve, 8-gasket, 11-outer cylinder, 12-inner cylinder, 13-guide sleeve one, 14-sliding sleeve, 21-piston rod, 22-piston, 23-cylinder barrel, 24-cylinder head one, 25-cylinder head two, 26-cavity one, 27-cavity two, 28-guide sleeve two, 29-sealing ring, 241-oil circuit one, 251-oil circuit two, 31-expansion and contraction reel. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings of the utility model specification to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] In a specific embodiment of the present invention, Figure 1 As shown, a rotary cylinder device for a casting and rolling mill, the rotary cylinder device comprises a connecting flange device 1 and an expansion and contraction cylinder 2, the connecting flange device 1 comprises an outer cylinder 11 and an inner cylinder 12 arranged in sequence from the outside to the inside, the two ends of the outer cylinder 11 are respectively fixed to the casting and rolling mill 3 and the expansion and contraction cylinder 2, the expansion and contraction reel 31 of the casting and rolling mill 3 is inserted into the inner cylinder 12, and a bidirectional thrust ball bearing 4 is arranged between the expansion and contraction reel 31 and the inner cylinder 12, and the bidirectional thrust ball bearing 4 is sleeved on the expansion and contraction reel 31; the expansion and contraction cylinder 2 comprises a piston rod 21, the piston rod 21 extends into the outer cylinder 11 and is fixedly connected to the inner cylinder 12 through a connecting sleeve 5, a gap is arranged between the piston rod 21 and the expansion and contraction reel 31, and the piston rod 21 drives the connecting sleeve 5, the inner cylinder 12 and the expansion and contraction reel 31 to move in the outer cylinder 11;
[0026] Here, through the design of the bidirectional thrust ball bearing, the connecting sleeve and the connecting flange device, the design of the rotary joint in the prior art can be eliminated, which not only meets the requirement that the expansion and contraction reel only rotates inside the connecting flange device and does not drive the expansion and contraction cylinder to rotate, but also eliminates the risk of pressure relief caused by the use of rotary joints in the prior art, thereby improving the safety performance in the production process; at the same time, the form of an expansion and contraction cylinder is adopted here, which makes the cylinder more stable during operation, reduces the occurrence of hydraulic oil leakage, greatly reduces the risk of leakage, and improves safety.
[0027] Specifically, a guide sleeve 13 is provided between the outer cylinder 11 and the inner cylinder 12, and the guide sleeve 13 is fixedly connected to the inner wall of the outer cylinder 11. A sliding sleeve 14 is embedded on the outer side of the inner cylinder 12, and the sliding sleeve 14 is slidably connected to the guide sleeve 13. The design of the sliding sleeve can greatly reduce friction and improve working accuracy; and the outer diameter of the sliding sleeve 14 is larger than the outer diameter of the inner cylinder 12 and the connecting sleeve 5. This design can avoid friction between the inner cylinder and the connecting sleeve and the outer cylinder, and reduce working energy consumption. In this embodiment, the guide sleeve 13 is fixed to the inner wall of the outer cylinder 11 by welding, and the strength and reliability of the fixed part can be ensured by welding.
[0028] Specifically, a sleeve 6 is sleeved on the expansion and contraction reel 31, and a threaded sleeve 7 is provided on one side of the sleeve 6. The threaded sleeve 7 is screwed on the end of the expansion and contraction reel 31 and locked by a fastener. The threaded sleeve 7 presses the sleeve 6 onto the inner ring of the bidirectional thrust ball bearing 4. This design makes it easy for the piston rod to synchronously drive the connecting sleeve, inner cylinder, bidirectional thrust ball bearing, sleeve and threaded sleeve to perform telescopic movement together when the piston rod is extended and retracted, thereby improving the overall performance and working stability.
[0029] Specifically, a gasket 8 is provided between the threaded sleeve 7 and the shaft sleeve 6; through the design of the gasket, the contact area can be increased and the pressure between the threaded sleeve and the shaft sleeve components can be reduced, thereby preventing loosening and protecting the components, thereby achieving a good operating state of the device.
[0030] Specifically, the expansion and contraction oil cylinder 2 in this embodiment further includes a piston 22, a cylinder barrel 23, and a cylinder head 1 24 and a cylinder head 25 arranged at both ends of the cylinder barrel 23. The piston 22 is arranged in the cylinder barrel 23 and connected to the piston rod 21. A cavity 1 26 and a cavity 27 are respectively provided between the piston 22 and the cylinder head 1 24 and the cylinder head 25. An oil passage 1 241 is provided on the cylinder head 1 24, and the oil passage 1 241 is communicated with the cavity 1 26. An oil passage 2 251 is provided on the cylinder head 25, and the oil passage 2 251 is communicated with the cavity 27.
[0031] Here is how it works:
[0032] When oil enters oil circuit 1 241, the hydraulic oil pushes the piston to move close to cavity 2 27, the piston rod retracts, and synchronously drives the connecting sleeve, inner cylinder, expansion and contraction reel, shaft sleeve, gasket, and threaded sleeve to move, and the expansion and contraction reel expands during this process;
[0033] When oil flows into oil circuit 251, the hydraulic oil pushes the piston to move close to cavity 1 26, the piston rod extends, and synchronously drives the connecting sleeve, inner cylinder, expansion and contraction reel, shaft sleeve, gasket, and threaded sleeve to move, and the expansion and contraction reel shrinks during this process.
[0034] like Figure 1 As shown, in this embodiment, cylinder cover 1 24 is fixed to cylinder barrel 23 by fasteners, and then cylinder cover 1 24 is fixed to outer barrel 11 by bolts and nuts, and cylinder cover 2 25 is fixed to cylinder barrel 23 by fasteners; the fasteners here can be anti-rotation screws.
[0035] In addition, a guide sleeve 28 is provided between the cylinder cover 24 and the piston rod 21, and the guide sleeve 28 is fixedly connected to the cylinder cover 24, and a plurality of sealing rings 29 are provided between the guide sleeve 28 and the piston rod 21; through the design of the guide sleeve 2, it can be used to support and ensure the coaxiality of the piston rod, ensure the stability and accuracy of the piston rod during the movement, and through the design of the sealing ring, the sealing performance is improved, the occurrence of hydraulic oil leakage is reduced, the risk of leakage is greatly reduced, and the safety is improved.
[0036] Specifically, seals are provided between the inner wall of the cylinder barrel 23 and the cylinder head 1 24 and the cylinder head 2 25 respectively, so as to improve the sealing performance inside the oil cylinder, reduce the occurrence of hydraulic oil leakage, and reduce the risk of leakage.
[0037] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.
Claims
1. A rotary cylinder device for a casting and rolling mill, characterized in that: The rotary cylinder device comprises a connecting flange device (1) and an expansion and contraction cylinder (2), wherein the connecting flange device (1) comprises an outer cylinder (11) and an inner cylinder (12) which are arranged in sequence from the outside to the inside, wherein the two ends of the outer cylinder (11) are respectively fixed to the casting and rolling machine (3) and the expansion and contraction cylinder (2), wherein the expansion and contraction reel (31) of the casting and rolling machine (3) is inserted into the inner cylinder (12) and a bidirectional thrust ball bearing (4) is arranged between the expansion and contraction reel (31) and the inner cylinder (12), and the bidirectional thrust ball bearing (4) is sleeved on the expansion and contraction reel (31); The expansion and contraction oil cylinder (2) comprises a piston rod (21), the piston rod (21) extends into the outer cylinder (11) and is fixedly connected to the inner cylinder (12) via a connecting sleeve (5), a gap is provided between the piston rod (21) and the expansion and contraction reel (31), and the piston rod (21) drives the connecting sleeve (5), the inner cylinder (12) and the expansion and contraction reel (31) to move in the outer cylinder (11).
2. A rotary cylinder device for a casting and rolling mill according to claim 1, characterized in that: A guide sleeve (13) is provided between the outer cylinder (11) and the inner cylinder (12), and the guide sleeve (13) is fixedly connected to the inner wall of the outer cylinder (11). A sliding sleeve (14) is embedded on the outer side of the inner cylinder (12), and the sliding sleeve (14) is slidably connected to the guide sleeve (13).
3. The rotary cylinder device for a casting and rolling mill according to claim 1, characterized in that: The expansion and contraction reel (31) is sleeved with a shaft sleeve (6), one side of the shaft sleeve (6) is provided with a threaded sleeve (7), the threaded sleeve (7) is screwed onto the end of the expansion and contraction reel (31) and is locked by a fastener, the threaded sleeve (7) presses the shaft sleeve (6) onto the inner ring of the bidirectional thrust ball bearing (4).
4. A rotary cylinder device for a casting and rolling mill according to claim 3, characterized in that: A gasket (8) is provided between the threaded sleeve (7) and the shaft sleeve (6).
5. The rotary cylinder device for a casting and rolling mill according to claim 1, characterized in that: The expansion and contraction oil cylinder (2) further comprises a piston (22), a cylinder barrel (23), and a cylinder head 1 (24) and a cylinder head 2 (25) arranged at both ends of the cylinder barrel (23); the piston (22) is arranged in the cylinder barrel (23) and connected to the piston rod (21); a cavity 1 (26) and a cavity 2 (27) are respectively arranged between the piston (22) and the cylinder head 1 (24) and the cylinder head 2 (25); an oil circuit 1 (241) is provided on the cylinder head 1 (24), and the oil circuit 1 (241) is communicated with the cavity 1 (26); an oil circuit 2 (251) is provided on the cylinder head 2 (25), and the oil circuit 2 (251) is communicated with the cavity 2 (27).
6. A rotary cylinder device for a casting and rolling mill according to claim 5, characterized in that: The cylinder head 1 (24) is fixed to the cylinder barrel (23) by fasteners, the cylinder head 1 (24) is fixed to the outer barrel (11) by bolts and nuts, and the cylinder head 2 (25) is fixed to the cylinder barrel (23) by fasteners.
7. The rotary cylinder device for a casting and rolling mill according to claim 5, characterized in that: A guide sleeve 2 (28) is provided between the cylinder cover 1 (24) and the piston rod (21); the guide sleeve 2 (28) is fixedly connected to the cylinder cover 1 (24); and a plurality of sealing rings (29) are provided between the guide sleeve 2 (28) and the piston rod (21).
8. The rotary cylinder device for a casting and rolling mill according to claim 5, characterized in that: Seals are provided between the inner wall of the cylinder barrel (23) and the cylinder cover 1 (24) and the cylinder cover 2 (25).
9. A rotary cylinder device for a casting and rolling mill according to claim 2, characterized in that: The guide sleeve 1 (13) is fixed to the inner wall of the outer cylinder (11) by welding.
10. The rotary cylinder device for a casting and rolling mill according to claim 2, characterized in that: The outer diameter of the sliding sleeve (14) is greater than the outer diameters of the inner cylinder (12) and the connecting sleeve (5).