Steel pipe necking device

Abstract

The utility model relates to the technical field of steel pipe necking, in particular to a steel pipe necking device. The necking device comprises a first shell, a second shell, a necking assembly and an oiling assembly. The second shell is arranged at the inlet end of the first shell. The necking-down assembly is arranged in the first shell and used for conducting necking-down treatment on the steel pipe. The oiling assembly is arranged in the second shell, and lubricating oil is smeared on the steel pipe before necking. The oil coating assembly comprises an oil coating piece which rolls through a plurality of balls and coats lubricating oil on the steel pipe; the oil supplementing part is used for supplementing lubricating oil for the oil coating part; and the pushing and pressing piece is used for pushing the oil storage sponge to extrude the lubricating oil filled in the oil storage sponge to the balls. When a steel pipe passes through the second shell, the multiple balls can be driven to rotate, and therefore lubricating oil stained on the balls is evenly smeared on the steel pipe. A layer of lubricating film can be formed on the surface of the steel pipe, friction force between the steel pipe and the necking module is reduced, and therefore friction loss in the machining process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe necking, in particular to a steel pipe necking device. Background Technique

[0002] The seamless steel pipe for boilers is a pipeline material specially used for manufacturing various types of boilers. The seamless steel pipe under the working conditions of the boiler needs to withstand high temperature and high pressure environments. Therefore, the material usually has excellent strength and pressure resistance performance and can maintain stability and safety under extreme conditions. During the processing of seamless steel pipes for boilers, necking treatment is usually required.

[0003] The Chinese patent document with the authorization announcement number CN217412190U proposes a necking device for steel pipes, including a processing table and a necking mechanism arranged on the processing table. The necking mechanism includes a cylinder, a connecting rod, a fixing plate, a support plate, a necking part and an adjusting component. The support plates are arranged in two groups parallel to each other. The cylinder is fixedly installed on the processing table and is fixed to one group of the support plates through the output end. The fixing plate is fixedly installed on the processing table and is located between the two groups of support plates. The connecting rods are arranged horizontally in four groups.

[0004] In the above application, although by setting fasteners, adjusting rods and necking parts, according to the position where the pipe fitting needs to be necked, the positions of the fasteners and adjusting rods can be rotated and then fastened. However, there is no structure for applying lubricating oil to the steel pipe. Without applying lubricating oil, the friction between the steel pipe and the necking tool during the necking process of the steel pipe will be relatively large, thereby increasing the wear of the steel pipe and the necking tool. Content of the Utility Model

[0005] Aiming at the problems existing in the background technique, a steel pipe necking device is proposed.

[0006] The utility model proposes a steel pipe necking device, including a first housing, a second housing, a necking component and an oil coating component. The second housing is arranged at the inlet end of the first housing. The necking component is arranged in the first housing to perform necking treatment on the steel pipe. The oil coating component is arranged in the second housing to apply lubricating oil to the steel pipe before necking. The oil coating component includes an oil coating part that applies lubricating oil to the steel pipe by rolling through a plurality of balls; an oil replenishing part that replenishes lubricating oil for the oil coating part; and a pressing part that squeezes the lubricating oil filled in the oil storage sponge to the balls by pushing the oil storage sponge.

[0007] Preferably, the necking assembly includes a fixed ring arranged at the inlet end of a shell; an inner ring of the fixed ring is provided with an adjustment bevel one, and a plurality of sliders are slidably provided in a ring array; a necking module is provided on the inner sides of the plurality of sliders; a telescopic mechanism is also provided inside the shell; a pushing cylinder is connected to the telescopic end of the telescopic mechanism; an inner ring of the end of the pushing cylinder facing the slider is provided with an adjustment bevel two; an end of the slider close to the fixed ring is provided with an adjustment bevel three cooperating with the adjustment bevel one, and an end close to the pushing cylinder is provided with an adjustment bevel four cooperating with the adjustment bevel two.

[0008] Preferably, both ends of the second shell are open; the oil-smearing part includes a connecting tube connected to the openings at both ends of the oil-smearing part; a plurality of balls are evenly connected to the connecting tube for rotation, and an oil storage sponge for coating the plurality of balls with lubricating oil is sleeved on the outer side.

[0009] Preferably, the oil replenishing member comprises an oil tank arranged at the second inner wall of the shell; the oil tank is connected with an oil pipe; the other end of the oil pipe is inserted into the oil storage sponge.

[0010] Preferably, the pushing member includes sleeves evenly arranged on the inner wall of the second shell; multiple sleeves are slidably connected to sliding columns at one end close to the oil storage sponge; the other ends of multiple sliding columns are connected to pushing plates, and the side walls are connected to sliding rails; an annular sliding rail is also provided on the inner wall of the second shell; a gear ring is slidably connected to the annular sliding rail; multiple gears are meshingly connected to the inner side of the gear ring; multiple gears are opposite to multiple sliding columns one by one, and are all rotatably connected to the inner wall of the second shell, one of the gears is connected to the driving end of the driving mechanism arranged on the second shell; an eccentric connecting column is provided at one end of the gear close to the sliding column; the connecting column is slidably connected to the sliding rail on the corresponding sliding column.

[0011] Preferably, one end of the push plate close to the oil storage sponge is in conformity with the shape of the oil storage sponge.

[0012] Preferably, a fixing cylinder is provided at one end of the shell body 2 which is away from the shell body 1; and an oil wiping sponge for wiping the lubricating oil on the steel pipe is provided on the inner side of the fixing cylinder.

[0013] Compared with the prior art, the utility model has the following beneficial technical effects:

[0014] (1) The steel pipe shrinking device drives multiple balls to rotate when the steel pipe passes through the second shell, so that the lubricating oil on the balls is evenly applied to the steel pipe. On the one hand, a lubricating film can be formed on the surface of the steel pipe to reduce the friction between the steel pipe and the shrinking module, thereby reducing the friction loss during the processing; on the other hand, it can make the contact between the steel pipe and the shrinking module smoother, reduce the generation of surface defects, and improve the surface quality and precision of the processing.

[0015] (2) The steel pipe necking device drives multiple gears and a gear ring to rotate by starting the driving mechanism. The rotation of the gears drives the connecting column to rotate, thereby driving the slide rail and the sliding column to slide outwards along the sleeve, so that the push pressing plate squeezes the oil storage sponge, and thus squeezes the lubricating oil on the oil storage sponge onto the ball bearings. It can always keep the ball bearings evenly coated with lubricating oil, and the amount of lubricating oil is appropriate, neither too much to cause the lubricating oil to overflow and result in waste of lubricating oil, nor too little to cause insufficient lubrication. Brief Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0018] Figure 3 It is a schematic diagram of the structure of the necking assembly of the present invention;

[0019] Figure 4 It is a schematic diagram of the structure of the oiling assembly of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the pushing member of the present invention.

[0021] Reference Signs: 1. First housing; 2. Second housing; 3. Necking assembly; 31. Fixed ring; 32. Slide block; 33. Necking module; 34. Pushing cylinder; 35. Telescopic mechanism; 4. Oiling assembly; 41. Oiling member; 411. Connecting cylinder; 412. Ball bearing; 413. Oil storage sponge; 42. Oil replenishing member; 421. Oil tank; 422. Oil pipe; 43. Pushing member; 431. Sleeve; 432. Sliding column; 433. Push pressing plate; 434. Slide rail; 435. Annular slide rail; 436. Gear ring; 437. Gear; 438. Driving mechanism; 439. Connecting column; 5. Fixed cylinder; 51. Oil wiping sponge. Detailed Description of the Embodiment

[0022] As Figures 1-5 shown, a steel pipe necking device proposed by the present invention includes a first housing 1, a second housing 2, a necking assembly 3 and an oiling assembly 4. The second housing 2 is arranged at the inlet end of the first housing 1. The necking assembly 3 is arranged inside the first housing 1 to perform necking treatment on the steel pipe. The oiling assembly 4 is arranged inside the second housing 2 to apply lubricating oil to the steel pipe before necking. The oiling assembly 4 includes an oiling member 41 that applies lubricating oil to the steel pipe by rolling a plurality of ball bearings 412; an oil replenishing member 42 that replenishes lubricating oil for the oiling member 41; and a pushing member 43 that squeezes the lubricating oil filled in the oil storage sponge 413 onto the ball bearings 412 by pushing the oil storage sponge 413.

[0023] Further explanation, the necking component 3 includes a fixing ring 31 arranged at the inlet end of the first housing 1; an adjusting inclined surface one is provided on the inner ring of the fixing ring 31, and a plurality of sliders 32 are slidably arranged in an annular array; a necking module 33 is provided on the inner side of each of the plurality of sliders 32; a telescopic mechanism 35 is further arranged in the first housing 1; the telescopic mechanism 35 is a cylinder; the telescopic end of the telescopic mechanism 35 is connected with a pushing cylinder 34; an adjusting inclined surface two is provided on the inner ring of the end of the pushing cylinder 34 facing the sliders 32; an adjusting inclined surface three matching with the adjusting inclined surface one is provided at one end of the slider 32 close to the fixing ring 31, and an adjusting inclined surface four matching with the adjusting inclined surface two is provided at one end close to the pushing cylinder 34. By pushing the pushing cylinder 34 through the telescopic mechanism 35, the plurality of necking modules 33 are contracted towards the central position, so as to perform necking treatment on the steel pipe.

[0024] Further explanation, both ends of the second housing 2 are open for the steel pipe to pass through; the oiling member 41 includes connecting cylinders 411 connected to the openings at both ends of the oiling member 41; a plurality of balls 412 are evenly rotatably connected to the connecting cylinders 411, and an oil storage sponge 413 for coating the plurality of balls 412 with lubricating oil is sleeved on the outside. When the steel pipe extends into the second housing 2, it will drive the plurality of balls 412 to roll, so that the lubricating oil contaminated on the balls 412 is evenly applied to the steel pipe. On the one hand, a lubricating film can be formed on the surface of the steel pipe to reduce the friction between the steel pipe and the necking module 33, thereby reducing the friction loss during the processing; on the other hand, it can make the contact between the steel pipe and the necking module 33 smoother, reduce the generation of surface defects, and improve the surface quality and accuracy of the processing.

[0025] Further explanation, the oil replenishing member 42 includes an oil tank 421 arranged on the inner wall of the second housing 2; an oil pipe 422 is communicated with the oil tank 421; a oil pump is arranged on the oil pipe 422, and the other end of the oil pipe 422 is inserted into the oil storage sponge 413. The oil storage sponge 413 can be replenished with lubricating oil at all times to avoid the oil storage sponge 413 from drying up.

[0026] To further illustrate, the pushing member 43 includes sleeves 431 evenly arranged on the inner wall of the shell 2; multiple sleeves 431 are slidably connected to a sliding column 432 at one end close to the oil storage sponge 413; the other ends of multiple sliding columns 432 are connected to a pushing plate 433, and the side walls are connected to a sliding rail 434; an annular sliding rail 435 is also provided on the inner wall of the shell 2; a gear ring 436 is slidably connected to the annular sliding rail 435; a plurality of gears 437 are meshingly connected to the inner side of the gear ring 436; a plurality of gears 437 are opposite to a plurality of sliding columns 432 one by one, and are all rotatably connected to the inner wall of the shell 2, one of the gears 437 is connected to the driving end of a driving mechanism 438 arranged on the shell 2; the driving mechanism 438 is a motor; an eccentric connecting column 439 is provided at one end of the gear 437 close to the sliding column 432; the connecting column 439 is slidably connected to the sliding rail 434 on the corresponding sliding column 432. The oil storage sponge 413 is pushed and squeezed by the push plate 433, and the lubricating oil stored in the oil storage sponge 413 is squeezed onto the ball 412, so that the ball 412 is covered with lubricating oil. The ball 412 can always be kept in a state of being evenly covered with lubricating oil, and the amount of lubricating oil is appropriate, without too much lubricating oil overflowing and causing lubricating oil waste, and too little lubricating oil causing insufficient lubrication.

[0027] Further, one end of the push plate 433 close to the oil storage sponge 413 is in conformity with the shape of the oil storage sponge 413. The oil storage sponge 413 can be squeezed evenly to avoid uneven amount of lubricating oil squeezed out of the oil storage sponge 413.

[0028] Further explanation, the end of the shell 2 2 away from the shell 1 1 is provided with a fixed cylinder 5; the inner side of the fixed cylinder 5 is provided with an oil wiping sponge 51 for wiping the lubricating oil on the steel pipe. After the shrinking is completed and the steel pipe exits the device, the excess lubricating oil on the steel pipe can be wiped off and the steel pipe can be cleaned to prevent the lubricating oil from contaminating other places and increasing the cleaning burden.

[0029] The working principle of the utility model is as follows: when working, first insert the steel pipe into the shell 1 through the fixed cylinder 5 and the opening in the center of the shell 2 2 in sequence. When the steel pipe passes through the shell 2 2, it will drive the multiple balls 412 to rotate, so that the lubricating oil stained on the balls 412 is evenly applied to the steel pipe. When the steel pipe is inserted into the shell 1, the telescopic mechanism 35 is started to drive the push cylinder 34 to extend, and the multiple sliders 32 are pushed, so that the multiple sliders 32 slide along the fixed ring 31, and through the mutual cooperation of the adjusting bevel 1 and the adjusting bevel 3, the multiple sliders 32 drive the shrinking module 33 to shrink inward, and the steel pipe is shrinked. When the steel pipe exits the device, the oil wiping sponge 51 will wipe and clean the lubricating oil on the steel pipe.

[0030] When the lubricating oil on the ball 412 is insufficient, first start the oil pump to pump the lubricating oil stored in the oil tank 421 along the oil pipe 422 into the oil storage sponge 413, so that the oil storage sponge 413 is filled with lubricating oil. Then start the driving mechanism 438 to drive a plurality of gears 437 and the gear ring 436 to rotate. The rotation of the gear 437 drives the connecting column 439 to rotate, thereby driving the slide rail 434 and the sliding column 432 to slide outward along the sleeve 431, so that the push pressing plate 433 squeezes the oil storage sponge 413, thereby squeezing the lubricating oil on the oil storage sponge 413 onto the ball 412, so that the ball 412 is covered with lubricating oil.

[0031] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A steel pipe necking device, characterized in that: include Shell 1 (1) and shell 2 (2); shell 2 (2) is arranged at the inlet end of shell 1 (1); A shrinking component (3) disposed in the housing (1) and performing shrinking treatment on the steel pipe; and an oiling assembly (4) disposed in the second housing (2) for applying lubricating oil to the steel pipe before shrinking; The oiling assembly (4) comprises an oiling member (41) for applying lubricating oil to the steel pipe by rolling a plurality of balls (412); An oil replenishing member (42) for replenishing lubricating oil to the oiling member (41); And by pushing the oil storage sponge (413), the lubricating oil filled in the oil storage sponge (413) is squeezed to the pushing member (43) on the ball (412).

2. A steel pipe necking device according to claim 1, characterized in that: The necking assembly (3) comprises a fixed ring (31) arranged at the inlet end of the shell (1); an inner ring of the fixed ring (31) is provided with an adjusting bevel 1, and a plurality of sliders (32) are slidably provided in an annular array; a necking module (33) is provided on the inner side of the plurality of sliders (32); a telescopic mechanism (35) is also provided inside the shell (1); a push cylinder (34) is connected to the telescopic end of the telescopic mechanism (35); an adjusting bevel 2 is provided on the inner ring of one end of the push cylinder (34) facing the slider (32); an adjusting bevel 3 cooperating with the adjusting bevel 1 is provided on one end of the slider (32) close to the fixed ring (31), and an adjusting bevel 4 cooperating with the adjusting bevel 2 is provided on one end of the slider (32) close to the push cylinder (34).

3. A steel pipe necking device according to claim 1, characterized in that: Both ends of the second shell (2) are open; the oil-spreading member (41) comprises a connecting tube (411) connected to the openings at both ends of the oil-spreading member (41); a plurality of balls (412) are evenly rotatably connected to the connecting tube (411), and an oil-storing sponge (413) is sleeved on the outer side for coating the plurality of balls (412) with lubricating oil.

4. A steel pipe necking device according to claim 3, characterized in that: The oil replenishing member (42) comprises an oil tank (421) arranged on the inner wall of the second housing (2); the oil tank (421) is connected with an oil pipe (422); the other end of the oil pipe (422) is inserted into the oil storage sponge (413).

5. A steel pipe necking device according to claim 4, characterized in that: The push member (43) comprises sleeves (431) uniformly arranged on the inner wall of the second shell (2); a plurality of sleeves (431) are slidably connected to a sliding column (432) at one end close to the oil storage sponge (413); a plurality of sliding columns (432) are connected to a push plate (433) at the other end, and are connected to a sliding rail (434) at the side wall; an annular sliding rail (435) is also arranged on the inner wall of the second shell (2); a gear ring (436) is slidably connected to the annular sliding rail (435); a gear ring (436) is provided inside the gear ring (436) A plurality of gears (437) are meshedly connected on the side; the plurality of gears (437) are opposite to the plurality of sliding posts (432) one by one, and are all rotatably connected to the inner wall of the second shell (2), wherein one of the gears (437) is connected to the driving end of a driving mechanism (438) arranged on the second shell (2); an eccentric connecting post (439) is arranged at one end of the gear (437) close to the sliding post (432); the connecting post (439) is slidably connected to the slide rail (434) on the corresponding sliding post (432).

6. A steel pipe necking device according to claim 5, characterized in that: One end of the push plate (433) close to the oil storage sponge (413) is in conformity with the shape of the oil storage sponge (413).

7. A steel pipe necking device according to claim 1, characterized in that: A fixing cylinder (5) is provided at one end of the second shell (2) away from the first shell (1); an oil wiping sponge (51) for wiping lubricating oil on the steel pipe is provided on the inner side of the fixing cylinder (5).

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