A seamless steel pipe and its production process

Abstract

The invention relates to the technical field of seamless steel pipes, and more specifically to a seamless steel pipe and a production device thereof; the invention comprises a front bar with a cone tip formed on the right end, a thread is formed on the right side of the front bar, a thread sleeve with a thread provided on the inner wall is connected to the right side of the front bar, two movable rods are rotatably connected to the thread sleeve, the outer ends of the two movable rods are respectively rotatably connected to two arc arms, and the right ends of the two arc arms are both rotatably connected to the left end of the cone tip; the left end of the front bar is fixedly connected to a rotating tube, the left side of the rotating tube is rotatably connected to the left end of a frame, the left end of the rotating tube is fixedly connected to a gear ring B, and the left end of the frame is rotatably connected to a gear B meshing with the gear ring B; the front and rear ends of the frame are rotatably connected to rotating shafts, the left ends of the two rotating shafts are fixedly connected to sprockets, the left end of the rotating tube is fixedly connected to a sprocket ring, and the sprocket ring and the two sprockets are driven by chains; the diameter of the perforation of the steel billet can be flexibly adjusted during the processing.

Description

Technical Field

[0001] The present invention relates to the technical field of seamless steel pipes, and more particularly to a seamless steel pipe and a production process thereof. Background Art

[0002] A seamless steel pipe is made by punching holes in a whole round steel. A steel pipe without a weld on the surface is called a seamless steel pipe. During the punching process, the diameter of the hole is determined by the size of the mold. When a different diameter is required, the mold needs to be disassembled and replaced. This method is not only cumbersome, but also time-consuming and labor-intensive, and will cause the production status to stagnate. Therefore, in order to solve the above problems, the present application provides a seamless steel pipe and its production process, which can flexibly adjust the size of the punching diameter of the steel billet during the processing process. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a seamless steel pipe and a production process thereof, which can flexibly adjust the size of the perforation diameter of the steel billet during the processing.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A seamless steel pipe production device, comprising a front bar with a cone tip formed on the right end, a thread is formed on the right side of the front bar, a thread sleeve with a thread on the inner wall is connected to the right side of the front bar, a ring is rotatably connected to the outer wall of the thread sleeve, two movable rods are rotatably connected to the ring, the outer ends of the two movable rods are respectively rotatably connected to two arc arms, and the right ends of the two arc arms are rotatably connected to the left end of the cone tip;

[0006] The left end of the front bar is fixedly connected with a rotating tube, the left side of the rotating tube is rotatably connected to the left end of the frame, the left end of the rotating tube is fixedly connected with a gear ring B, and the left end of the frame is rotatably connected with a gear B meshing with the gear ring B.

[0007] The front and rear ends of the frame are rotatably connected to rotating shafts, the left ends of the two rotating shafts are fixedly connected to sprockets, the left end of the rotating tube is fixedly connected to a sprocket ring, the sprocket ring and the two sprockets are driven by a chain, right threads are opened on the right sides of the two rotating shafts, and push plates are connected to the right sides of the two rotating shafts.

[0008] A cylinder is fixedly connected to the lower right end of the frame, a top frame is fixedly connected to the cylinder rod of the cylinder, arc pads are slidably connected to the left and right ends of the top frame, a tension spring is fixedly connected between the bottom end of each arc pad and the bottom surface of the top frame, and an inclined panel is formed at the lower end of the push plate, both left and right sides of the inclined panel are inclined and can contact the upper end surface of the arc pad.

[0009] A seamless steel pipe production process, the process comprising the following steps:

[0010] Process 1: After heating the steel billet, it is transported to two arc pads through a conveyor belt, and the steel billet is moved to the same height as the axis of the front bar by a cylinder;

[0011] Process 2: The front bar and the cone tip are driven to rotate by the rotating tube, so that the rotating shaft drives the push plate to push the billet to the left;

[0012] Process 3: The billet moves to the left and passes through the cone tip to machine a hole in the middle of the seamless steel pipe, and the inner mold is used to shape the outer wall of the billet;

[0013] Process 4: Reverse the pipe rotation so that the push arm drives the gasket to push the seamless steel pipe to the right, allowing the steel brush to polish the inner wall of the seamless steel pipe.

[0014] The raw materials of the seamless steel pipe include carbon, manganese, palladium, iron, copper, nitrogen, phosphorus, silicon, boron, tin, lead and zinc. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation processes.

[0016] Figure 1 It is a structural schematic diagram of the processing device in the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the cone tip in the present invention;

[0018] Figure 3 It is a structural schematic diagram of the front bumper in the present invention;

[0019] Figure 4 It is a structural schematic diagram of the transfer tube of the present invention;

[0020] Figure 5 It is a structural schematic diagram of the rotating shaft in the present invention;

[0021] Figure 6 It is a schematic diagram of the structure of the top frame in the present invention;

[0022] Figure 7 It is a structural schematic diagram of the push plate in the present invention;

[0023] Figure 8 It is a structural schematic diagram of the ring barrel in the present invention;

[0024] Fig. 9 It is a structural schematic diagram of the inner mold in the present invention;

[0025] Fig.10 It is a schematic diagram of the structure of the gasket ring in the present invention;

[0026] In the figure: cone tip 01; front bar 02; threaded sleeve 03; movable rod 04; arc arm 05; rotating sleeve 06; gear ring A07; gear A08; rotating groove 09; steel brush 10; rotating tube 11; gear ring B12; chain tooth ring 13; frame 14; gear B15; rotating shaft 16; sprocket 17; push plate 18; inclined plate 19; cylinder 20; top frame 21; arc pad 22; spring 23; left thread 24; right thread 25; ring barrel 26; nozzle 27; inner mold 28; side plate 29; push arm 30; telescopic rod 31; gasket 32. DETAILED DESCRIPTION

[0027] See attached Figures 1 to 10 From the structure shown, it can be understood that an exemplary operation process of adjusting the inner diameter of the present application is:

[0028] A seamless steel pipe production device, comprising a front bar 02 with a cone tip 01 formed on the right end, a thread is formed on the right side of the front bar 02, a thread sleeve 03 with a thread on the inner wall is connected to the right side of the front bar 02, a ring is rotatably connected to the thread sleeve 03, two movable rods 04 are rotatably connected to the ring, the outer ends of the two movable rods 04 are respectively rotatably connected to two arc arms 05, and the right ends of the two arc arms 05 are rotatably connected to the left end of the cone tip 01; by rotating the thread sleeve 03, the thread sleeve 03 can be moved left and right on the front bar 02, The circular ring can be driven to translate relative to the cone tip 01 through the threaded sleeve 03, so that the two movable rods 04 support the two arc arms 05 to rotate on the cone tip 01, thereby adjusting the distance between the top of the arc arm 05 and the axis of the cone tip 01. When the front bar 02 drives the cone tip 01 to rotate, a hole can be punched in the middle of the billet. Compared with traditional production equipment, it is more convenient and flexible than replacing different-sized molds in the middle to perform punching. There is no need to disassemble and replace the mold, which reduces the number of operating steps and the complexity.

[0029] See attached Figures 1 to 10 From the structure shown, it can be understood that an exemplary operation process of the rotary perforation of the present application is:

[0030] The left end of the front bar 02 is fixedly connected to a rotating tube 11, the left side of the rotating tube 11 is rotatably connected to the left end of the frame 14, the left end of the rotating tube 11 is fixedly connected to a gear ring B12, and the left end of the frame 14 is rotatably connected to a gear B15 meshing with the gear ring B12; by using a reduction motor to drive the gear B15 to rotate, the gear B15 meshes with the gear ring B12 to drive the rotating tube 11 to rotate on the frame 14, so that the rotating tube 11 drives the front bar 02 to rotate the cone tip 01, so that the process of punching a hole can be performed in the middle of the billet. In addition, by connecting a cold water pipe to the left end of the rotating tube 11, the coolant can enter the rotating tube 11 to reduce the temperature of the rotating tube 11, thereby avoiding the temperature of the rotating tube 11 to increase and cause a lot of wear when the friction with the billet generates heat.

[0031] See attached Figures 1 to 10 From the structure shown, it can be understood that an exemplary operation process of pushing the steel billet of the present application is:

[0032] The frame 14 is rotatably connected to the rotating shaft 16 at both the front and rear ends, and the left ends of the two rotating shafts 16 are fixedly connected to the sprocket wheels 17, and the left end of the rotating tube 11 is fixedly connected to the sprocket ring 13, and the sprocket ring 13 and the two sprocket wheels 17 are driven by a chain. The right sides of the two rotating shafts 16 are provided with right threads 25, and the right sides of the two rotating shafts 16 are connected to push plates 18; as the rotating tube 11 rotates, the sprocket ring 13 at the left end of the rotating tube 11 can drive the two sprocket wheels 17 to rotate through the chain, so that the two sprocket wheels 17 respectively drive the two rotating shafts 16 to rotate, so that the two rotating shafts 16 can drive the push plates 18 to move left, and the steel billet aligned with the cone tip 01 can be pushed to the left, so that the cone tip 01 completes the perforation in the middle of the steel billet during the movement of the steel billet, and when the rotating tube 11 rotates in the opposite direction, the two rotating shafts 16 can drive the push plates 18 to move right and reset.

[0033] See attached Figures 1 to 10 From the structure shown, it can be understood that an exemplary operation process of erecting a steel billet of the present application is:

[0034] The lower right end of the frame 14 is fixedly connected to a cylinder 20, and a top frame 21 is fixedly connected to the cylinder rod of the cylinder 20. Arc pads 22 are slidably connected to the left and right ends of the top frame 21. A tension spring is fixedly connected between the bottom end of each arc pad 22 and the bottom surface of the top frame 21, and an inclined panel 19 is formed at the lower end of the push plate 18. The left and right sides of the inclined panel 19 are both inclined and can contact the upper end surface of the arc pad 22; a conveyor belt is used to hole the heated steel billet onto the two arc pads 22, and then the cylinder 20 is used to drive the top frame 21 to rise, so that the top frame 21 drives the two arc pads 22 to rise, so that the steel billet moves to the same height as the axis of the cone tip 01 and aligns with the cone tip 01, so as to achieve positioning. Then, when the push plate 18 moves to the left, the push plate 18 will push the steel billet, and in the process of moving, the inclined panel 19 contacts the arc pad 22 and presses the arc pad 22 downward, so that the arc pad 22 slides downward to avoid interfering with the moving route of the push plate 18, so as to achieve the stability of the push plate 18.

[0035] See attached Figures 1 to 10 From the structure shown, it can be understood that an exemplary operation process of the outer wall forming of the present application is:

[0036] A circular barrel 26 is fixedly connected to the middle part of the frame 14, and side plates 29 are fixedly connected to the front and rear ends of the circular barrel 26. The right end of the circular barrel 26 is detachably connected to an inner mold 28, so that when the steel billet passes through the inner mold 28, the outermost side of the deformed steel billet can contact the inner wall of the inner mold 28 and be restricted and guided by the inner mold 28, so that the outer wall of the processed seamless steel pipe is consistent with the shape of the inner wall of the inner mold 28. The inner mold 28 can be replaced as needed to obtain seamless steel pipes of different shapes.

[0037] See attached Figures 1 to 10 From the structure shown, it can be understood that an exemplary operation process of launching a seamless steel pipe of the present application is:

[0038] The left side of the rotating shaft 16 located at the rear side is provided with a left thread 24, and the left sides of the two rotating shafts 16 are both in sliding contact with push arms 30, and the left sides of the inner ends of the two push arms 30 are fixedly connected with telescopic rods 31, and the right ends of the two telescopic rods 31 are fixedly connected with gaskets 32. The push arms 30 located at the rear side are provided with threaded holes, and the push arms 30 are connected to the left side of the rotating shaft 16 through the threaded holes. Two springs 23 are fixedly connected to the inner side of the left end of the frame 14, and the right ends of the two springs 23 are respectively in contact with the left ends of the two push arms 30; when the rotating shaft 16 rotates forward and drives the push plate 18 to move left, the left thread 24 can be used to drive the push arms 30 to move left until they leave Left thread 24, at this time the push arm 30 squeezes the spring 23, and the left end of the steel billet after being formed into a seamless steel pipe will contact the gasket 32. After processing is completed, as the rotating shaft 16 rotates in the opposite direction and the push plate 18 moves to the right, the push arm 30 can be moved to the right under the action of the spring and contact the left thread 24 again and move to the right under the guidance of the left thread 24, so that the gasket 32 ​​pushes the seamless steel pipe to move to the right and leave the rotating tube 11, and finally the two telescopic rods 31 can be used to drive the gasket 32 ​​to continue to move to the right, so that the seamless steel pipe leaves the range of the cone tip 01 and moves to the arc pad 22, so as to realize automatic unloading of seamless steel pipes.

[0039] See attached Figures 1 to 10 From the structure shown, it can be understood that an exemplary operation process of the accelerated molding of the present application is:

[0040] The left end of the annular barrel 26 is fixedly connected with a plurality of nozzles 27, which are connected to the inside of the annular barrel 26. After the seamless steel pipe is processed, water mist can be sprayed through the plurality of nozzles 27, thereby accelerating the cooling and forming speed of the seamless steel pipe.

[0041] See attached Figures 1 to 10 From the structure shown, it can be understood that an exemplary operation process of cleaning the inner wall of the present application is:

[0042] The left side of the front bar 02 is provided with a thread, and a rotating sleeve 06 is connected to the left side of the front bar 02. A gear ring A07 is fixedly connected to the outer wall of the rotating sleeve 06. A gear A08 meshing with the gear ring A07 is rotatably connected to the middle part of the front bar 02, and a ring is rotatably connected to the rotating sleeve 06. The upper and lower ends of the ring are rotatably connected to movable rods 04, and the outer ends of the two movable rods 04 are respectively rotatably connected to rotating grooves 09. The left ends of the two rotating grooves 09 are rotatably connected to the front bar 02, and the outer side of each rotating groove 09 is detachably connected to a steel brush 10; when the rotating tube 11 rotates in the opposite direction, the gear A08 can be driven by a motor to rotate, so that the gear A08 meshes with the gear ring A07 to drive the rotating sleeve 06 to rotate, so that the rotating sleeve 06 drives the ring to translate, and the movable rod 04 drives the rotating groove 09 to rotate, so that the rotating groove 09 drives the steel brush 10 to contact the inner wall of the seamless steel pipe, so that the inner wall of the seamless steel pipe can be polished during rotation.

[0043] A seamless steel pipe production process, the process comprising the following steps:

[0044] Process 1: After heating the steel billet, it is transported to two arc pads 22 through a conveyor belt, and the steel billet is driven by a cylinder 20 to move to the same height as the axis of the front bumper 02;

[0045] Process 2: The front bar 02 and the cone tip 01 are driven to rotate by the rotating tube 11, so that the rotating shaft 16 drives the push plate 18 to push the steel billet to the left;

[0046] Process 3: The steel billet moves to the left and passes through the cone tip 01 to machine a hole in the middle of the seamless steel pipe, and the inner mold 28 is used to shape the outer wall of the steel billet;

[0047] Process 4: The rotating tube 11 is reversed, so that the push arm 30 drives the gasket ring 32 to push the seamless steel tube to the right, and the steel brush 10 polishes the inner wall of the seamless steel tube.

[0048] The raw materials of the seamless steel pipe include carbon, manganese, palladium, iron, copper, nitrogen, phosphorus, silicon, boron, tin, lead and zinc.

Claims

1. A seamless steel pipe production device, characterized in that: The invention comprises a front bar (02) with a cone tip (01) formed on the right end, a thread is formed on the right side of the front bar (02), a thread sleeve (03) with a thread arranged on the inner wall is connected to the right side of the front bar (02), a circular ring is rotatably connected to the outer wall of the thread sleeve (03), two movable rods (04) are rotatably connected to the circular ring, the outer ends of the two movable rods (04) are respectively rotatably connected to two arc arms (05), and the right ends of the two arc arms (05) are both rotatably connected to the left end of the cone tip (01).

2. The seamless steel pipe production device according to claim 1, characterized in that: The left end of the front bar (02) is fixedly connected to a rotating tube (11), the left side of the rotating tube (11) is rotatably connected to the left end of the frame (14), the left end of the rotating tube (11) is fixedly connected to a gear ring B (12), and the left end of the frame (14) is rotatably connected to a gear B (15) meshing with the gear ring B (12).

3. The seamless steel pipe production device according to claim 2, characterized in that: The frame (14) is rotatably connected to a rotating shaft (16) at both the front and rear ends, the left ends of the two rotating shafts (16) are fixedly connected to sprockets (17), the left end of the rotating tube (11) is fixedly connected to a sprocket ring (13), the sprocket ring (13) and the two sprockets (17) are driven by a chain, the right sides of the two rotating shafts (16) are provided with right threads (25), and the right sides of the two rotating shafts (16) are connected to push plates (18).

4. The seamless steel pipe production device according to claim 3, characterized in that: The lower right end of the frame (14) is fixedly connected to a cylinder (20), a top frame (21) is fixedly connected to the cylinder rod of the cylinder (20), arc pads (22) are slidably connected to the left and right ends of the top frame (21), a tension spring is fixedly connected between the bottom end of each arc pad (22) and the bottom surface of the top frame (21), and an inclined panel (19) is formed at the lower end of the push plate (18), and both left and right sides of the inclined panel (19) are inclined surfaces and can contact the upper end surface of the arc pad (22).

5. The seamless steel pipe production device according to claim 4, characterized in that: A circular barrel (26) is fixedly connected to the middle of the frame (14), side plates (29) are fixedly connected to the front and rear ends of the circular barrel (26), and an inner mold (28) is detachably connected to the right end of the circular barrel (26).

6. The seamless steel pipe production device according to claim 5, characterized in that: A left thread (24) is provided on the left side of the rotating shaft (16) at the rear side. Push arms (30) are slidably contacted on the left sides of the two rotating shafts (16). Telescopic rods (31) are fixedly connected to the left sides of the inner ends of the two push arms (30). Pad rings (32) are fixedly connected to the right ends of the two telescopic rods (31). A threaded hole is provided on the push arm (30) at the rear side. The push arm (30) is connected to the left side of the rotating shaft (16) through the threaded hole. Two springs (23) are fixedly connected to the inner side of the left end of the frame (14). The right ends of the two springs (23) are respectively in contact with the left ends of the two push arms (30).

7. The seamless steel pipe production device according to claim 6, characterized in that: A plurality of nozzles (27) are fixedly connected to the left end of the annular barrel (26), and the plurality of nozzles (27) are communicated with the interior of the annular barrel (26).

8. The seamless steel pipe production device according to claim 7, characterized in that: The left side of the front bar (02) is provided with a thread, the left side of the front bar (02) is connected with a rotating sleeve (06), the outer wall of the rotating sleeve (06) is fixedly connected with a gear ring A (07), the middle part of the front bar (02) is rotatably connected with a gear A (08) meshing with the gear ring A (07), the outer wall of the rotating sleeve (06) is rotatably connected with a ring, the upper and lower ends of the ring are rotatably connected with movable rods (04), the outer ends of the two movable rods (04) are respectively rotatably connected with rotating grooves (09), the left ends of the two rotating grooves (09) are rotatably connected to the front bar (02), and the outer side of each rotating groove (09) is detachably connected with a steel brush (10).

9. A production process using the production device of claim 8, characterized in that: The process includes the following steps: Process 1: After heating the steel billet, the steel billet is transported to two arc pads (22) via a conveyor belt, and the steel billet is driven by a cylinder (20) to move to the same height as the axis of the front bar (02); Process 2: The front bar (02) and the cone tip (01) are driven to rotate by the rotating tube (11), so that the rotating shaft (16) drives the push plate (18) to push the steel billet to the left; Process 3: The steel billet moves to the left and passes through the cone tip (01) to form a hole in the middle of the seamless steel pipe, and the outer wall of the steel billet is formed by the inner mold (28); Process 4: The rotating tube (11) is reversed, so that the push arm (30) drives the backing ring (32) to push the seamless steel tube to the right, and the steel brush (10) polishes the inner wall of the seamless steel tube.

10. A seamless steel pipe, characterized in that: The raw materials of the seamless steel pipe include carbon, manganese, palladium, iron, copper, nitrogen, phosphorus, silicon, boron, tin, lead and zinc.

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