Extra-thick quenched and tempered pipe cold-drawing device for near-net-shape drill collar pipe

Abstract

The utility model discloses an extra thick quenched and tempered pipe cold drawing device for a near net shape drill collar pipe, and relates to the field of steel pipe processing, the extra thick quenched and tempered pipe cold drawing device comprises a bearing table, the top surface of the bearing table is fixedly connected with a group of positioning plates, the two positioning plates are internally provided with through grooves, and the through grooves are internally connected with elastic supporting devices in a sliding manner; one end of one elastic supporting device is fixedly connected with a fixing block, the two side faces of the fixing block are both fixedly connected with first fan-shaped friction plates, and one end of the other elastic supporting device is fixedly connected with a second fan-shaped friction plate. According to the utility model, the two first fan-shaped friction plates and the second friction plate are arranged, so that the surface of the steel pipe can be cleaned when the steel pipe is subjected to cold drawing, impurities on the surface are prevented from entering a mold when the steel pipe passes through the mold, the impurities are prevented from rubbing the surface of the steel pipe subjected to subsequent cold drawing, and the service life of the steel pipe is prolonged. And therefore, pit points and scratches are prevented from being generated on the surface of the cold-drawn steel pipe.

Description

Technical Field

[0001] The utility model relates to the field of steel pipe processing, in particular to a cold drawing device for an extra-thick quenched and tempered pipe used for a near-final drill collar. Background Art

[0002] The drill collar is located at the bottom of the drill string and is the main component of the lower drill bit assembly. Its main characteristics are thick wall, large gravity and rigidity. In order to facilitate the drilling work, the outer surface of the internal thread of the drill collar can be processed with hanging grooves and slip grooves. The pipes used for drill collars are generally modulated extra-thick pipes, and these pipes need to be cold-drawn with special pipes to become special dedicated pipes before being used on drill collars.

[0003] After searching, the applicant found that a Chinese patent disclosed "a cold drawing device" with a publication (announcement) number of "CN212652404U". The patent mainly provides a clamping mechanism to clamp the steel pipe during the drawing process, thereby effectively reducing the shaking of the steel pipe during the drawing process, and the clamping mechanism is set at a fixed distance from the core head, thereby preventing interference with the movement of the core head and ensuring the continuity of the drawing process;

[0004] The device in the above patent can perform a certain clamping effect when cold drawing the steel pipe, reducing the shaking of the steel pipe during the cold drawing process. However, when the steel pipe is cold drawn, some debris will be generated in the mold due to the friction between the steel pipe and the mold, which will affect the shaping of the steel pipe during the subsequent cold drawing. As a result, there are many potholes and cracks on the surface of the steel pipe after cold drawing, and it needs to be polished later, which increases the complexity of the processing procedure. Utility Model Content

[0005] The purpose of the utility model is to provide a near-final drill collar extra-thick quenched and tempered tube cold drawing device to solve the problem that the device in the above patent proposed in the above background technology can perform a certain clamping effect when cold drawing the steel pipe, thereby reducing the shaking of the steel pipe during the cold drawing process. However, when the steel pipe is cold drawn, some debris will be generated in the mold due to the friction between the steel pipe and the mold, which will affect the shaping of the steel pipe during the subsequent cold drawing of the steel pipe, and there will be many potholes and cracks on the surface of the steel pipe after cold drawing, and grinding treatment is required later, which increases the complexity of the processing procedure.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cold drawing device for a near-final drill collar tube with extra-thick quenched and tempered pipe, comprising a bearing platform, a group of positioning plates fixedly connected to the top surface of the bearing platform, through grooves are provided in the two positioning plates, and elastic support devices are slidably connected in the through grooves, one end of one of the elastic support devices is fixedly connected to a fixed block, the two side surfaces of the fixed block are fixedly connected to a first fan-shaped friction plate, one end of the other elastic support device is fixedly connected to a second fan-shaped friction plate, the width of the second fan-shaped friction plate is equal to the spacing distance between the two first fan-shaped friction plates, the top surfaces of the two positioning plates are commonly fixedly connected to a guide plate, the bottom surface of the guide plate is provided with a group of movable plates, the two movable plates are provided with circular grooves in the interior, and one end of the two elastic support devices is respectively inserted into the interior of the circular grooves.

[0007] Preferably, the elastic support device includes a sleeve, the size of the sleeve is smaller than the through groove inside the positioning plate, the interior of the sleeve is slidably connected with a support rod, one end of the support rod is fixedly connected to a first spring, the end of the first spring away from the support rod is fixedly connected to the inner wall of the sleeve, and the surface of the sleeve is provided with a bayonet.

[0008] Preferably, a top end of the guide plate is fixedly connected to a drive motor, and an output end of the drive motor is fixedly connected to a worm.

[0009] Preferably, a guide groove is provided on the bottom surface of the guide plate, a bidirectional threaded rod is rotatably connected inside the guide groove, a worm wheel is fixedly connected to the surface of the bidirectional threaded rod, and the worm wheel is meshingly connected to the worm wheel.

[0010] Preferably, a group of sliders are threadedly connected to the surface of the bidirectional threaded rod, and the bottom surfaces of two sliders are fixedly connected to the top surfaces of the corresponding moving plates.

[0011] Preferably, sliding grooves are provided on opposite sides of the two movable plates, and push plates are slidably connected inside the two sliding grooves.

[0012] Preferably, one side of the two push plates is fixedly connected with a clamping block, and the size of the clamping block is adapted to the bayonet.

[0013] Preferably, one side of the two push plates is fixedly connected to a second spring, and a side of the second spring away from the push plates is fixedly connected to the inner wall of the slide groove.

[0014] Preferably, the interior of the supporting platform is slidably connected to a U-shaped support frame, the bottom surface of the supporting platform is rotatably connected to a threaded rod, the threaded rod passes through the inner wall of the U-shaped support frame, the bottom surface of the supporting platform is fixedly connected to an L-shaped support frame, the top surface of the L-shaped support frame is fixedly connected to a reciprocating motor, and the output end of the reciprocating motor is fixedly connected to one end of the threaded rod.

[0015] Preferably, a roller is provided on the top surface of the bearing platform, two ends of the roller are rotatably connected to the inner wall of the U-shaped support frame, and a mold assembly is fixedly connected to the top surface of the bearing platform.

[0016] Technical effects and advantages of the utility model:

[0017] 1. The utility model provides two first sector-shaped friction plates and a second friction plate, so that the surface of the steel pipe can be cleaned when the steel pipe is cold drawn, so as to prevent impurities on the surface of the steel pipe from entering the mold when the steel pipe passes through the mold, and to avoid impurities from scratching the surface of the subsequent cold-drawn steel pipe, thereby avoiding pits and scratches on the surface of the steel pipe after cold drawing.

[0018] 2. The utility model is connected by a snap-fitting manner between the elastic support device and the movable plate, so that when the first sector-shaped friction plate and the second sector-shaped friction plate need to be replaced after long-term use, they can be easily unloaded and replaced, thereby making the surface of the raw material steel pipe cleaned more thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the support platform of the utility model.

[0021] Figure 3 It is a schematic diagram of the exploded structure of the elastic support device of the utility model.

[0022] Figure 4 It is a schematic diagram of the front cross-sectional structure of the guide plate of the utility model.

[0023] Figure 5 It is a schematic diagram of the front cross-sectional structure of the movable plate of the utility model.

[0024] In the figure: 1. supporting platform; 2. positioning plate; 3. elastic supporting device; 31. sleeve; 32. support rod; 33. first spring; 34. bayonet; 4. fixing block; 5. first fan-shaped friction plate; 6. second fan-shaped friction plate; 7. moving plate; 71. slide groove; 72. circular groove; 73. second spring; 74. clamping block; 8. guide plate; 81. guide groove; 82. bidirectional threaded rod; 83. worm gear; 84. slider; 9. driving motor; 91. worm; 10. push plate; 11. U-shaped support frame; 12. drum; 13. threaded rod; 14. reciprocating motor; 15. L-shaped support frame; 16. mold assembly. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model 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 in 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.

[0026] The utility model provides Figure 1-5 The shown device is a cold drawing device for a near-final drill collar tube with extra-thick quenched and tempered pipe, comprising a bearing platform 1, a group of positioning plates 2 being fixedly connected to the top surface of the bearing platform 1, through grooves being provided inside the two positioning plates 2, and elastic support devices 3 being slidably connected inside the through grooves, one end of one of the elastic support devices 3 being fixedly connected to a fixed block 4, both side surfaces of the fixed block 4 being fixedly connected to a first fan-shaped friction plate 5, one end of the other elastic support device 3 being fixedly connected to a second fan-shaped friction plate 6, the width of the second fan-shaped friction plate 6 being equal to the spacing distance between the two first fan-shaped friction plates 5, the top surfaces of the two positioning plates 2 being fixedly connected to a guide plate 8, the bottom surface of the guide plate 8 being provided with a group of movable plates 7, the insides of the two movable plates 7 being provided with circular grooves 72, and one ends of the two elastic support devices 3 being respectively inserted into the inside of the circular grooves 72.

[0027] like Figure 1 As shown, a roller 12 is provided on the top surface of the supporting platform 1, and both ends of the roller 12 are rotatably connected to the inner wall of the U-shaped support frame 11. Through the roller 12, the steel pipe can be supported when cold drawing is performed. A mold assembly 16 is fixedly connected to the top surface of the supporting platform 1, and a driving motor 9 is fixedly connected to the top of the guide plate 8, and a worm 91 is fixedly connected to the output end of the driving motor 9.

[0028] like Figure 2 As shown, the interior of the supporting platform 1 is slidably connected to a U-shaped support frame 11, and the height of the opening of the mold can be adjusted up and down through the movement of the U-shaped support frame 11 to ensure that the steel pipe is aligned with the extrusion opening of the mold. The bottom surface of the supporting platform 1 is rotatably connected to a threaded rod 13, and the threaded rod 13 passes through the inner wall of the U-shaped support frame 11. The bottom surface of the supporting platform 1 is fixedly connected to an L-shaped support frame 15, and the top surface of the L-shaped support frame 15 is fixedly connected to a reciprocating motor 14. The output end of the reciprocating motor 14 is fixedly connected to one end of the threaded rod 13. When it is necessary to adjust the height of the steel pipe, the reciprocating motor 14 is started to drive the threaded rod 13 to rotate, and the U-shaped support frame 11 is driven to move by the rotation of the threaded rod 13, thereby adjusting the height of the drum 12, and then adjusting the height of the steel pipe.

[0029] like Figure 3As shown, the elastic support device 3 includes a sleeve 31, the size of which is smaller than the through groove inside the positioning plate 2. The sleeve 31 is slidably connected to a support rod 32 inside, and one end of the support rod 32 is fixedly connected to a first spring 33. The end of the first spring 33 away from the support rod 32 is fixedly connected to the inner wall of the sleeve 31, and a bayonet 34 is provided on the surface of the sleeve 31.

[0030] like Figure 4 As shown, a guide groove 81 is provided on the bottom surface of the guide plate 8, a bidirectional threaded rod 82 is rotatably connected inside the guide groove 81, a worm gear 83 is fixedly connected to the surface of the bidirectional threaded rod 82, the worm 91 is meshedly connected to the worm gear 83, a group of sliders 84 are threadedly connected to the surface of the bidirectional threaded rod 82, and the bottom surfaces of the two sliders 84 are fixedly connected to the top surfaces of the corresponding movable plates 7.

[0031] like Figure 5 As shown, the opposite sides of the two movable plates 7 are provided with sliding grooves 71, and the interiors of the two sliding grooves 71 are slidably connected to push plates 10, and one side of the two push plates 10 is fixedly connected to a clamping block 74, and the size of the clamping block 74 is adapted to the bayonet 34. One side of the two push plates 10 is fixedly connected to a second spring 73, and the side of the second spring 73 away from the push plate 10 is fixedly connected to the inner wall of the sliding groove 71. When replacement is required, the push plate 10 is first pushed, and the clamping block 74 is separated from the bayonet 34 through the movement of the push plate 10, and then the elastic support device 3 is taken out from the positioning plate 2, and the two new first sector friction plates 5 and second sector friction plates 6 can be replaced.

[0032] Working principle of the utility model: When the utility model is used, the steel pipe is first placed on the surface of the drum 12, and then one end of the steel pipe passes through the die assembly 16 to clamp the surface of the steel pipe before cold drawing, so that the steel pipe is driven to move by the drawing machine during cold drawing, and then when the steel pipe moves, the two first sector friction plates 5 and the second sector friction plates 6 clean the surface of the steel pipe;

[0033] When clamping the surface of the steel pipe, first start the drive motor 9, and drive the worm 91 to rotate through the output end of the drive motor 9, and drive the worm wheel 83 to rotate through the rotation of the worm 91, and drive the bidirectional threaded rod 82 to rotate through the rotation of the worm wheel 83, and drive the two sliders 84 to move toward each other through the rotation of the bidirectional threaded rod 82, and drive the two movable plates 7 to move toward each other through the movement of the two sliders 84, and drive the two elastic support devices 3 to move toward each other through the relative movement of the two movable plates 7, and then drive the two first fan-shaped friction plates 5 and the second fan-shaped friction plates 6 to move toward each other, so as to clamp the surface of the steel pipe, and then when the pulling machine drives the steel pipe to move, the surface of the steel pipe is cleaned at this time. This article highlights the innovative structure and does not elaborate on the prior art.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cold drawing device for a near-final drill collar with a particularly thick quenched and tempered tube, comprising a bearing platform (1), characterized in that: A group of positioning plates (2) are fixedly connected to the top surface of the support platform (1), and through grooves are provided inside the two positioning plates (2), and elastic support devices (3) are slidably connected inside the through grooves, one end of one of the elastic support devices (3) is fixedly connected to a fixed block (4), and the two side surfaces of the fixed block (4) are fixedly connected to a first fan-shaped friction plate (5), and one end of the other elastic support device (3) is fixedly connected to a second fan-shaped friction plate (6), and the width of the second fan-shaped friction plate (6) is equal to the spacing distance between the two first fan-shaped friction plates (5), and the top surfaces of the two positioning plates (2) are commonly fixedly connected to a guide plate (8), and the bottom surface of the guide plate (8) is provided with a group of movable plates (7), and circular grooves (72) are provided inside the two movable plates (7), and one end of the two elastic support devices (3) is respectively inserted into the inside of the circular grooves (72).

2. The cold drawing device for a near-final drill collar with extra-thick quenched and tempered tube according to claim 1, characterized in that: The elastic support device (3) comprises a sleeve (31), the size of the sleeve (31) is smaller than the through groove inside the positioning plate (2), the interior of the sleeve (31) is slidably connected with a support rod (32), one end of the support rod (32) is fixedly connected with a first spring (33), one end of the first spring (33) away from the support rod (32) is fixedly connected to the inner wall of the sleeve (31), and a bayonet (34) is provided on the surface of the sleeve (31).

3. The cold drawing device for a near-final drill collar with extra-thick quenched and tempered tube according to claim 1, characterized in that: The top end of the guide plate (8) is fixedly connected to a drive motor (9), and the output end of the drive motor (9) is fixedly connected to a worm (91).

4. The cold drawing device for a near-final drill collar with extra-thick quenched and tempered tube according to claim 3, characterized in that: A guide groove (81) is provided on the bottom surface of the guide plate (8), a bidirectional threaded rod (82) is rotatably connected inside the guide groove (81), a worm wheel (83) is fixedly connected to the surface of the bidirectional threaded rod (82), and the worm wheel (91) is meshingly connected to the worm wheel (83).

5. The cold drawing device for a near-final drill collar with extra-thick quenched and tempered tube according to claim 4, characterized in that: A group of sliders (84) are threadedly connected to the surface of the bidirectional threaded rod (82), and the bottom surfaces of the two sliders (84) are fixedly connected to the top surfaces of the corresponding moving plates (7).

6. The cold drawing device for a near-final drill collar with extra-thick quenched and tempered tube according to claim 1, characterized in that: The two movable plates (7) are provided with sliding grooves (71) on opposite sides thereof, and the interiors of the two sliding grooves (71) are slidably connected with push plates (10).

7. The cold drawing device for a near-final drill collar with extra-thick quenched and tempered tube according to claim 6, characterized in that: One side of the two push plates (10) is fixedly connected with a clamping block (74), and the size of the clamping block (74) is adapted to the clamping port (34).

8. The cold drawing device for a near-final drill collar with extra-thick quenched and tempered tube according to claim 6, characterized in that: One side of the two push plates (10) is fixedly connected to a second spring (73), and a side of the second spring (73) away from the push plates (10) is fixedly connected to the inner wall of the slide groove (71).

9. The cold drawing device for a near-final drill collar with extra-thick quenched and tempered tube according to claim 1, characterized in that: The interior of the bearing platform (1) is slidably connected to a U-shaped support frame (11); the bottom surface of the bearing platform (1) is rotatably connected to a threaded rod (13); the threaded rod (13) penetrates the inner wall of the U-shaped support frame (11); the bottom surface of the bearing platform (1) is fixedly connected to an L-shaped support frame (15); the top surface of the L-shaped support frame (15) is fixedly connected to a reciprocating motor (14); the output end of the reciprocating motor (14) is fixedly connected to one end of the threaded rod (13).

10. The cold drawing device for a near-final drill collar with extra-thick quenched and tempered tube according to claim 1, characterized in that: A roller (12) is provided on the top surface of the bearing platform (1), and both ends of the roller (12) are rotatably connected to the inner wall of the U-shaped support frame (11). A mold assembly (16) is fixedly connected to the top surface of the bearing platform (1).

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