阅读说明：本技术 用于棒材平立可转换轧机齿轮箱的万向旋转回油装置 (Universal rotary oil return device for bar horizontal and vertical convertible rolling mill gear box ) 是由 莫雁北 彭正刚 贺应欢 吕柳新 梁海涛 于 2019-08-09 设计创作，主要内容包括：一种用于棒材平立可转换轧机齿轮箱的万向旋转回油装置,在第一弯管、第二弯管的一端固定法兰,第一弯管、第二弯管的另一端为连接端,第一弯管、第二弯管的连接端采用外环套接内环的结构连接,在连接部位安装轴承形成轴承装置,使得第一弯管、第二弯管的连接端构成转动结构。其优点是在轧机翻转过程中,金属软管会因万向旋转接头内轴承装置跟随轧机旋转而始终处于垂直状态,可避免轧机翻转过程中对金属软管产生冲击,消除轧机处于水平状态时金属软管在靠近管端法兰位置所承受的弯曲力,对金属软管起到了保护作用,除可用于棒材生产线精轧机列平立转换轧机回油金属软管起到保护作用外,在其它存在旋转的软连接场合也可进行推广和应用。(The utility model provides a universal rotatory oil return device for rod is flat stand convertible rolling mill gear box, is at the one end fixed flange of first return bend, second return bend, and the other end of first return bend, second return bend is the link, and the link of first return bend, second return bend adopts the outer loop to cup joint the structural connection of inner ring, installs the bearing at the connection position and forms bearing device for the link of first return bend, second return bend constitutes rotating-structure. The universal rotary joint has the advantages that in the rolling mill overturning process, the metal hose can be always in a vertical state due to the fact that the bearing device in the universal rotary joint rotates along with the rolling mill, impact on the metal hose in the rolling mill overturning process can be avoided, bending force born by the metal hose at the position close to a pipe end flange when the rolling mill is in a horizontal state is eliminated, the metal hose is protected, the universal rotary joint can be used for protecting oil return metal hoses of a horizontal-vertical conversion rolling mill of a bar production line, and the universal rotary joint can be popularized and applied in other flexible connection occasions.)

1. The utility model provides a universal rotatory oil return device that is used for bar level to found convertible rolling mill gear box which characterized in that: the flange is fixed at one end of the first bent pipe and the second bent pipe, the other end of the first bent pipe and the other end of the second bent pipe are connecting ends, the connecting ends of the first bent pipe and the second bent pipe are structurally connected by adopting an outer ring sleeved with an inner ring, and a bearing is arranged at the connecting part to form a bearing device, so that the connecting ends of the first bent pipe and the second bent pipe form a rotating structure.

2. The universal rotary oil return device for the gear box of the bar horizontal and vertical convertible rolling mill according to claim 1, characterized in that: the bearing device comprises annular grooves with balls arranged on the outer diameter of the inner ring, annular grooves with balls arranged on the corresponding positions of the inner diameter of the outer ring, balls are arranged in the annular grooves, and the two annular grooves are connected and assembled in place to form the bearing device.

3. The universal rotary oil return device for the gear box of the bar horizontal and vertical convertible rolling mill according to claim 2, characterized in that: and a plug hole is formed in the annular groove in the inner diameter of the outer ring, the ball is placed in the annular groove through the plug hole, and a plug is placed in the plug hole to seal the ball in the annular groove.

4. The universal rotary oil return device for the gear box of the bar horizontal and vertical convertible rolling mill according to claim 2 or 3, characterized in that: an oil cup for supplying oil to the balls is arranged at the outer ring.

Technical Field

The invention relates to the technical field of bar mill trains, in particular to a universal rotary oil return device for a bar horizontal and vertical convertible mill gearbox.

Background

The bar mill train mostly adopts a horizontal and vertical alternative arrangement form, the finish rolling mill train adopts a horizontal and vertical conversion form according to the process requirements, and the states of oil return devices of the gear boxes of the rolling mills in the horizontal and vertical rolling mill states are different.

The original oil return form of the gear box of the bar production line is changed horizontally and vertically: the design of the gear box of the horizontal-vertical conversion rolling mill on the bar production line adopts an armored metal hose 19 for returning oil, and two sides of the metal hose are connected by flanges 18. The metal hose 19 is in line with the gearbox return oil hard pipe 17 of the gearbox 16 when the rolling mill is in a vertical state (as shown in figure 6). When the rolling mill converts the horizontality into, metal collapsible tube 19 is the vertical state (as in fig. 7) with gear box oil return hard tube 17, and metal collapsible tube bears the hose dead weight and the intraductal fluid gravity combined action at the department of buckling 20 this moment, thereby the oil leak condition can appear in the breakage in the department of buckling in the metal collapsible tube after lasting a period of time under this kind of state, and the oil leak has caused environmental pollution, has increased oil consumption, causes the hidden danger for equipment safe operation.

When the rolling mill is switched between the horizontal state and the vertical state, the metal hose is also subjected to impact force generated by the overturning of the rolling mill at a position close to the pipe end flange, so that the damage of the metal hose is aggravated.

Disclosure of Invention

The invention aims to provide a universal rotary oil return device for a gear box of a bar horizontal-vertical convertible rolling mill, which can realize that a gear box oil return metal hose meets the requirements of horizontal and vertical working states of a rolling mill and the overturning working condition of the rolling mill.

The solution of the invention is such that:

the utility model provides a universal rotatory oil return device for rod is flat stand convertible rolling mill gear box, is at the one end fixed flange of first return bend, second return bend, and the other end of first return bend, second return bend is the link, and the link of first return bend, second return bend adopts the outer loop to cup joint the structural connection of inner ring, installs the bearing at the connection position and forms bearing device for the link of first return bend, second return bend constitutes rotating-structure.

The more specific technical scheme also comprises the following steps: the bearing device comprises annular grooves with balls arranged on the outer diameter of the inner ring, annular grooves with balls arranged on the corresponding positions of the inner diameter of the outer ring, balls are arranged in the annular grooves, and the two annular grooves are connected and assembled in place to form the bearing device.

Further: and a plug hole is formed in the annular groove in the inner diameter of the outer ring, the ball is placed in the annular groove through the plug hole, and a plug is placed in the plug hole to seal the ball in the annular groove.

Further: an oil cup for supplying oil to the balls is arranged at the outer ring.

The universal swivel joint oil return device has the advantages that a device similar to a rolling bearing structure is designed between two flange pipes of the universal swivel joint oil return device, so that the metal hose can be always in a vertical state due to the fact that the bearing device in the universal swivel joint rotates along with the rolling mill in the rolling mill overturning process, impact on the metal hose in the rolling mill overturning process can be avoided, bending force borne by the metal hose at the position close to a pipe end flange when the rolling mill is in a horizontal state is eliminated, the metal hose is protected, the universal swivel joint oil return device can be used for protecting oil return metal hoses of a horizontal and vertical conversion rolling mill of a bar production line, and can be popularized and applied in other soft connection occasions with rotation; the original speed reducer, thin oil pipeline arrangement and metal hose are not changed, and only a universal rotary joint oil return device is designed between an original gear box oil return hard pipe flange and a metal hose flange, so that the installation is convenient and the cost is low; the bearing device is welded with the pipeline component after being assembled, the inner ring and the outer ring of the bearing device and the pipeline component are made of stainless steel, and argon arc welding is adopted for welding, so that the bearing device is ensured not to deform and influence the flexibility of rotation.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the structure of the bearing device 3 in the structure shown in fig. 1.

Fig. 3 is a schematic view of the ball assembly of the bearing device 3 shown in fig. 2.

Fig. 4 is a schematic diagram of the arrangement of the oil return pipeline when the rolling mill is in a horizontal state.

Fig. 5 is a view from direction B of fig. 4.

Fig. 6 is a schematic diagram of an arrangement of an oil return pipeline when a traditional flat-vertical conversion rolling mill is in a vertical state.

Fig. 7 is a schematic diagram of an arrangement of an oil return pipeline when a traditional horizontal-vertical transition rolling mill is in a horizontal state.

The parts of the drawings are detailed as follows: the device comprises a first straight pipe 1, a first elbow 2, a bearing device 3, a second elbow 4, a second straight pipe 5, a second flange 6, a first flange 7, a mechanical seal 8, a first ball 9, an outer ring 10, a second ball 11, an inner ring 12, a plugging hole 13, a plug 14, an oil cup 15, a gear box 16, a gear box oil return hard pipe 17, a flange 18 and a metal hose 19.

Detailed Description

As shown in fig. 1, 2 and 3, in this embodiment, the first elbow includes a first flange 7, a first straight pipe 1 and a first elbow 2, and the second elbow includes a second flange 6, a second straight pipe 5 and a second elbow 4, wherein a connection end of the first elbow is an outer ring 10, a connection end of the second elbow is an inner ring 12, two annular grooves for placing balls are formed at a corresponding position of an inner diameter of the outer ring 10, the two annular grooves for placing balls are respectively placed with a first ball 9 and a second ball 11, two annular grooves for placing balls are formed at a corresponding position of an outer diameter of the inner ring 12, a mechanical seal 8 is arranged at a joint of the first elbow and the second elbow, a plug hole 13 is formed at a position of the annular groove of the outer diameter of the first elbow, when the first elbow and the second elbow are assembled in place, the balls are placed in the annular grooves by the plug hole, a plug 14 is placed in the annular groove, and a rolling, The connecting end of the second elbow forms a rotating structure, and an oil cup 15 for supplying oil to the ball is arranged on the outer ring of the first elbow.

During assembly, each group of balls consists of 30 balls with the diameter of 10mm, the balls are plugged into the raceway one by one through the plugging holes after the inner ring and the outer ring of the bearing device are assembled in place (as shown in figure 3), and the plugging holes are plugged by plugs after the balls are plugged. Lubricating grease is injected into the ball through the oil cup for lubrication, so that the service life of the ball in a long-term rotating state is guaranteed.

The invention is used for arranging an oil return pipeline when a rolling mill is in a horizontal state as shown in figures 4 and 5, a gear box 16 is connected with an oil return hard pipe 17 of the gear box, the invention A is connected through a flange 18, and then is connected with a metal hose 19 through the flange, when the gear box rotates horizontally and vertically, the rotation is realized through a bearing device 3,

because a device similar to a rolling bearing structure is designed between the two flange pipes of the oil return device of the universal rotary joint, the metal hose can be always in a vertical state because the bearing device in the universal rotary joint rotates along with the rolling mill in the rolling mill overturning process, the impact on the metal hose in the rolling mill overturning process can be avoided, the bending force born by the metal hose at the position close to the pipe end flange when the rolling mill is in a horizontal state is eliminated, and the metal hose is protected.