Multi-stage telescopic oil return pipe

Abstract

The present invention relates to the field of large lathes, and in particular to a multi-stage telescopic oil return pipe, comprising: a telescopic pipe, a flange and a joint; the telescopic pipe comprises a sleeve, which is composed of at least two stages of movable sleeves, the flange is fixedly arranged at both ends of the sleeve, and the joint is installed on the flange. The multi-stage telescopic oil return pipe of the present invention is vertically fixedly installed, and a pressing hose is connected at both ends of the joint to respectively connect the crossbeam oil receiving box and the hydraulic oil tank to form a complete circuit. The automatic return of the lubricating oil of the crossbeam of a large vertical lathe to the hydraulic oil tank can be achieved by gravity without the need for an oil return pump, thereby eliminating the problem of equipment failure caused by the oil return pump and saving maintenance costs. The present invention also has the characteristics of simple structure, convenience and practicality.

Description

Technical Field

[0001] The invention relates to the field of large lathes, and in particular to a multi-stage telescopic oil return pipe. Background Art

[0002] The hydraulic oil of the beam lubrication system of a large vertical lathe is mostly extracted from the oil tank in the pit by an oil supply pump and transported to the beam for lubrication; the lubricating oil is collected through the beam oil receiving box and pumped back to the oil tank by the return oil pump installed on the beam. Because the beam needs to be raised and lowered, the return oil pipe is mostly made of a hose, which is connected to the hydraulic oil tank in the pit through a towline to form a circulating oil supply. However, if the return oil pump is used to return the oil, once the return oil pump drive motor fails or the return oil pump fails, the oil in the beam oil receiving box cannot be transported back to the tank in time, which will cause the hydraulic oil to accumulate and overflow from the beam oil receiving box, which not only wastes resources, but also requires downtime for maintenance and delays the construction period. Summary of the invention

[0003] In view of the main shortcomings of the oil return pump method used in the large vertical lathe crossbeam lubrication system, the present invention provides a multi-stage telescopic oil return pipe. The oil pipe is installed vertically, and the crossbeam guide rail lubricating oil flows back to the oil tank by gravity, replacing the method of using a hydraulic oil pump to return oil, reducing equipment failure rate and saving resources.

[0004] The objective of the present invention is achieved in this way. A multi-stage telescopic oil return pipe comprises: a telescopic pipe, a flange and a joint; the telescopic pipe comprises a sleeve, which is composed of at least two stages of movably connected sleeves, the flange is fixedly arranged at both ends of the telescopic pipe, and the joint is installed on the flange.

[0005] Furthermore, the sleeve is composed of a guide sleeve, a steel pipe and a cylindrical pin; the outer diameter of the guide sleeve is larger than the outer diameter of the steel pipe, and the inner diameter is smaller than the inner diameter of the steel pipe; the inner wall of the opening at one end of the guide sleeve is processed with an interface that can extend into the steel pipe, and the interface is coaxial with the guide sleeve and matches the steel pipe; the steel pipe is butt-jointed with the interface and welded to fix the steel pipe and the guide sleeve together; an annular groove is provided on the inner wall of the other end of the guide sleeve; a through hole is radially provided at the other end of the steel pipe, and the cylindrical pin passes through the through hole.

[0006] Furthermore, the sleeves are sleeved with each other between every two levels, the steel pipe of the sleeve of the upper level extends into the guide sleeve of the sleeve of the lower level, an O-ring is provided in the annular groove on the sleeve of the lower level, and the length of the cylindrical pin of the sleeve of the upper level from the guide sleeve is greater than the length of the sleeve of the lower level.

[0007] Furthermore, the length of the cylindrical pin of the upper-level sleeve is greater than the inner diameter of the guide sleeve of the lower-level sleeve and is smaller than the inner diameter of the steel pipe of the lower-level sleeve.

[0008] Furthermore, the flange includes a first flange, a second flange and a sealing gasket; the first flange is welded to the outer wall of the openings at both ends of the telescopic tube, and the second flange matches the first flange; the first flange and the second flange are provided with corresponding through holes, which are connected by screws, and the sealing gasket is arranged between the first flange and the second flange.

[0009] Furthermore, one end of the joint is butt-jointed with the second flange.

[0010] The invention discloses a multi-stage telescopic oil return pipe, which is fixedly installed vertically, and has a pressed hose at both ends of the joint, which is respectively connected to the crossbeam oil receiving box and the hydraulic oil tank, to form a complete circuit, and can realize the automatic return of the lubricating oil of the crossbeam of a large vertical lathe to the hydraulic oil tank by gravity without the need for an oil return pump, thereby eliminating the equipment failure problem caused by the oil return pump and saving maintenance costs. The invention also has the characteristics of simple structure, convenience and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic structural diagram of a multi-stage telescopic oil return pipe of the present invention;

[0012] Figure 2 A schematic diagram of fixing a multi-stage telescopic oil return pipe of the present invention;

[0013] Figure 3 A schematic diagram of a casing of a multi-stage telescopic oil return pipe of the present invention;

[0014] Figure 4 The invention discloses a multi-stage telescopic oil return pipe Figure 2 Magnified view of the middle X area;

[0015] Figure 5 The invention discloses a multi-stage telescopic oil return pipe Figure 2 Magnified view of the middle Y region.

[0016] Among them, 1-telescopic tube; 10-sleeve; 11-guide sleeve; 12-steel pipe; 13-cylindrical pin; 14-O-ring; 2-flange; 21-first flange; 22-second flange; 23-sealing gasket; 3-joint; 4-mounting support; 5-pipe clamp. DETAILED DESCRIPTION

[0017] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0018] The structure of the multi-stage telescopic oil return pipe of the present invention is as follows Figure 1 As shown, it includes: expansion pipe 1, flange 2 and joint 3. Please combine Figure 3 The telescopic pipe 1 includes a sleeve 10, which is composed of at least two stages of sleeves 10 that can be movably connected and can be telescopic from top to bottom. Flanges 2 are welded at both ends of the telescopic pipe 1, and joints 3 are installed on the flanges 2. Lubricating oil can flow in the multi-stage telescopic oil return pipe.

[0019] In one embodiment of the present invention, Figure 2 As shown, the multi-stage telescopic oil return pipe is installed vertically, the flange 2 at the top of the multi-stage telescopic oil return pipe is fixed to one end of the mounting support 4 by screws, and the other end of the mounting support 4 is fixed to the machine tool crossbeam. The multi-stage telescopic oil return pipe can be telescoped from top to bottom along with the machine tool crossbeam; the sleeve 10 at the bottom of the telescopic pipe 1 is installed on the vertical lathe column through the pipe clamp 5.

[0020] like Figure 3 As shown, each level of sleeve 10 is composed of a guide sleeve 11, a steel pipe 12 and a cylindrical pin 13. The guide sleeve 11 is welded to one end of the steel pipe 12, and a through hole is radially provided at the other end of the steel pipe 12 to penetrate the steel pipe 12, and the cylindrical pin 13 passes through the through hole and is installed in the through hole. Among them, the guide sleeve 11 is coaxial with the steel pipe 12; the outer diameter of the guide sleeve 11 is larger than the outer diameter of the steel pipe 12 welded thereto, and the inner diameter is smaller than the inner diameter of the steel pipe 12 welded thereto; the inner wall of the opening at one end of the guide sleeve 11 is processed with an interface that can extend into the steel pipe 12, and the interface is coaxial with the guide sleeve 11 and matches the steel pipe 12; the steel pipe 12 is butt-jointed with the interface and welded to fix the steel pipe 12 and the guide sleeve 11 together.

[0021] The end where the guide sleeve 11 is located is the head end of the sleeve 10, and the end where the cylindrical pin 13 is located is the tail end of the sleeve 10. An annular groove is processed on the inner wall of the guide sleeve 11 near the head end of the sleeve 10 for installing an O-ring 15 to prevent lubricating oil leakage.

[0022] Recombination Figure 4 Every two levels of casing 10 are connected to each other, the steel pipe 12 of the upper level casing 10 extends into the guide sleeve 11 of the lower level casing 10, and an O-ring is provided in the annular groove on the lower level casing 10.

[0023] When the two-stage sleeve 10 is assembled, the tail end of the upper-stage sleeve 10 is inserted into the head end of the lower-stage sleeve 10. When the guide sleeves 11 of the two-stage sleeves 10 are in contact, the steel pipe 12 of the upper-stage sleeve 10 extends from the steel pipe 12 of the lower-stage sleeve and leaks out of the through hole on the upper-stage sleeve 10, that is, the length of the cylindrical pin 13 of the upper-stage sleeve 10 from the guide sleeve 11 is greater than the length of the lower-stage sleeve 10, and the preferred extension length is 30 mm. At this time, the cylindrical pin 13 is installed and inserted into the through hole. The length of the cylindrical pin 13 is greater than the inner diameter of the guide sleeve 11 of the lower-stage sleeve 10 and smaller than the inner diameter of the steel pipe 12 of the lower-stage sleeve 10, and the two ends of the cylindrical pin 13 will leak out of the through hole. When the telescopic tube 1 is extended, the two ends of the cylindrical pin 13 at the tail end of the upper-stage sleeve will collide with the bottom of the guide sleeve 11 at the tail end of the lower-stage sleeve 10, preventing the sleeves 10 of each stage from being disengaged. The head end and the tail end of each level of the sleeve 10 are sleeved with each other, and the inner diameter of the sleeve 10 increases and the length decreases from top to bottom.

[0024] like Figure 5 As shown, the flange 2 includes a first flange 21, a second flange 22 and a sealing gasket 23. The first flange 21 is welded on the outer wall of the openings at both ends of the telescopic tube 1, and the first flange 21 matches the second flange. A sealing gasket 23 is provided between the first flange 21 and the second flange 22 to prevent lubricating oil leakage. The joint 30 is a common pipe joint, which is fixedly mounted on the second flange 22. The first flange 21 and the second flange 22 are provided with corresponding through holes and connected by screws.

[0025] It should be noted that when using a multi-stage telescopic oil return pipe of the present invention, the joint 30 at the top of the telescopic pipe 1 is connected to the vertical lathe crossbeam oil receiving box by a pressed hose, and the joint 30 at the bottom is connected to the hydraulic oil tank, forming a complete oil return pipeline, and the telescopic range of the telescopic pipe 1 is greater than the working range in the vertical direction of the machine tool crossbeam, and the telescopic pipe 1 is extended and retracted with the lifting and lowering of the machine tool crossbeam. The lubricating oil in the crossbeam oil receiving box enters the multi-stage telescopic oil return pipe under the action of gravity and flows back into the hydraulic oil tank. Among them, the length and number of stages of the casing 10 are determined according to the actual situation to ensure that the oil pipe of the present invention can achieve the expected effect.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-stage telescopic oil return pipe, characterized in that: include: A telescopic tube (1), a flange (2) and a joint (3); the telescopic tube (1) comprises a sleeve (10) which is composed of at least two stages of sleeves (10) that are movably connected, the flange (2) is fixedly arranged at both ends of the telescopic tube (1), and the joint (3) is installed on the flange (2); The sleeve (10) is composed of a guide sleeve (11), a steel pipe (12) and a cylindrical pin (13); the outer diameter of the guide sleeve (11) is larger than the outer diameter of the steel pipe (12), and the inner diameter is smaller than the inner diameter of the steel pipe (12); an interface capable of inserting the steel pipe (12) is processed on the inner wall of the opening at one end of the guide sleeve (11), and the interface is coaxial with the guide sleeve (11) and matches the steel pipe (12); the steel pipe (12) and the interface are butt-jointed and welded to fix the steel pipe (12) and the guide sleeve (11) together; an annular groove is provided on the inner wall of the other end of the guide sleeve (11); a through hole is radially provided at the other end of the steel pipe (12), and the cylindrical pin (13) passes through the through hole; The sleeves (10) are sleeved with each other in every two stages, the steel pipe (12) of the sleeve (10) of the upper stage extends into the guide sleeve (11) of the sleeve (10) of the lower stage, an O-ring (14) is arranged in the annular groove on the sleeve (10) of the lower stage, and the length of the cylindrical pin (13) of the sleeve (10) of the upper stage from the guide sleeve (11) is greater than the length of the sleeve (10) of the lower stage; The length of the cylindrical pin (13) of the upper-level sleeve (10) is greater than the inner diameter of the guide sleeve (11) of the lower-level sleeve (10) and smaller than the inner diameter of the steel pipe (12) of the lower-level sleeve (10); The flange (2) comprises a first flange (21), a second flange (22) and a sealing gasket (23).

2. The multi-stage telescopic oil return pipe according to claim 1, characterized in that: The first flange (21) is welded to the outer wall of the openings at both ends of the telescopic tube (1), and the second flange (22) matches the first flange (21); the first flange (21) and the second flange (22) are provided with corresponding through holes and are connected by screws, and the sealing gasket (23) is arranged between the first flange (21) and the second flange (22).

3. The multi-stage telescopic oil return pipe according to claim 2, characterized in that: One end of the joint (3) is butt-jointed with the second flange (22).

Images