Steel pipe cold drawing device

Abstract

The present application relates to the technical field of metal pipe processing equipment, in particular to a steel pipe cold drawing device, which comprises two material placing tables, a drawing trolley arranged between the two material placing tables, and two top rod trolleys arranged on the two sides of the two material placing tables, a first drawing seat is arranged on the side of each material placing table close to the drawing trolley, and two second drawing seats are fixedly connected to the two ends of the drawing trolley corresponding to the first drawing seat. The steel pipe cold drawing device provided by the present application is symmetrically arranged with two drawing lines on the left and right sides of the drawing trolley, the reciprocating stroke of the drawing trolley is fully utilized, the uncut head steel pipes and the uncut tail steel pipes on the left and right sides of the drawing trolley are drawn respectively, and five steel pipes are drawn at one time. After a group of steel pipes are drawn, another group of steel pipes is continuously drawn, the "empty load" phenomenon in the back-off process of the drawing trolley after drawing a group of steel pipes is avoided, the reciprocating work of the drawing trolley is realized, and the work efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of metal pipe processing equipment technology, specifically a steel pipe cold drawing device. Background Technology

[0002] Cold drawing technology is a widely used production method in steel pipe manufacturing. During the production and processing of steel pipes, a cold drawing device is needed to cold draw the pipes to produce smaller diameter or other shapes. Existing cold drawing devices have low efficiency. For example, patent number CN202321329012.X discloses a cold drawing device that uses a cold drawing chain, a drawing trolley, and a hydraulic cylinder to draw the steel pipes. During the reciprocating motion of the cold drawing chain and the drawing trolley, only one side of the steel pipe can be drawn. After the drawing trolley finishes drawing a set of steel pipes, it experiences an "empty load" phenomenon during its retraction. Therefore, existing cold drawing devices have low output and low efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a steel pipe cold drawing device with higher working efficiency in order to solve the above-mentioned problems.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a cold drawing device for steel pipes, comprising two material placement platforms, a drawing trolley disposed between the two material placement platforms, and two push rod trolleys disposed on both sides of the two material placement platforms. Each material placement platform is provided with a first material drawing seat on the side near the drawing trolley. Two second material drawing seats are connected and fixed at both ends of the drawing trolley corresponding to the first material drawing seats. The drawing trolley includes a slide, a toothed plate disposed above the slide and movable left and right along the slide, a gearbox disposed above the toothed plate and driven by the toothed plate, and a drive mechanism driven by the gearbox. The two second material drawing seats are symmetrically connected and fixed at both ends of the toothed plate. The push rod trolley has the same structure as the drawing trolley. A push rod connecting block is connected and fixed at one end of the push rod trolley near the material placement platform. Multiple push rods are installed at one end of the push rod connecting block near the material placement platform.

[0005] Based on the above technical solution, the present invention can be further improved as follows: Furthermore, both the first and second material pulling seats are provided with multiple clamping holes.

[0006] Furthermore, the material placement platform is provided with multiple guide grooves, which are aligned with multiple clamping holes on the first and second material extraction seats, and the cross-section of the guide grooves is arc-shaped.

[0007] Furthermore, the upper surface of the slide block is provided with an installation groove and a wedge-shaped slide groove. A pulley is rotatably installed in the installation groove. The upper surface of the toothed plate is provided with multiple meshing teeth along the length direction of the toothed plate. The lower surface of the toothed plate protrudes downward to form a wedge-shaped slide bar. The slide bar extends along the length direction of the toothed plate. The slide bar of the toothed plate is embedded in the slide groove of the slide block. The lower surface of the toothed plate abuts against the pulley in the installation groove of the slide block.

[0008] Furthermore, the drive mechanism is a motor, and the gearbox includes a housing and a gear disposed inside the housing and connected to a rotating shaft. The gear meshes with the meshing teeth on the upper surface of the gear plate for transmission, and the rotating shaft extends out of the housing and is connected and fixed to the output shaft of the motor.

[0009] Furthermore, the outer wall of the housing and the slide is connected and fixed by a connecting arm.

[0010] Furthermore, a top rod connecting block is fixedly connected to one end of the toothed plate of the top rod trolley near the material placement table.

[0011] Furthermore, both the bottom of the material placement platform and the first material extraction seat are equipped with hydraulic supports, and the lower surface of the slide is equipped with support columns.

[0012] The beneficial effects of this invention are as follows: The cold drawing device for steel pipes provided by this invention innovates the existing cold drawing technology for steel pipes. It arranges two drawing lines symmetrically on the left and right sides with the drawing trolley as the center, making full use of the reciprocating stroke of the drawing trolley to draw the steel pipes without cutting the head and tail on the left and right sides of the drawing trolley respectively. It also realizes the drawing of five steel pipes at one time. After drawing one group of steel pipes, it continues to draw another group of steel pipes, avoiding the "no-load" phenomenon during the retraction process of the drawing trolley after drawing one group of steel pipes. It realizes the reciprocating back and forth operation of the drawing trolley and greatly improves the work efficiency. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the steel pipe cold drawing device provided in a preferred embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the material placement platform in the middle; Figure 3 yes Figure 2 A schematic diagram of the structure of the material placement platform with a guide groove; Figure 4 yes Figure 1 A schematic diagram of the structure of the pulling trolley in the diagram; Figure 5 yes Figure 4 A side sectional view of the pulling trolley in the middle; Figure 6 yes Figure 1A schematic diagram of the push rod trolley in the middle; Figure 7 yes Figure 6 A schematic diagram of the mounting of the push rod on the push rod trolley; In the diagram: 10. Material placement platform; 11. Guide groove; 20. Pulling trolley; 22. Slide seat; 221. Mounting groove; 222. Pulley; 223. Slide groove; 24. Tooth plate; 242. Meshing tooth; 244. Slide bar; 26. Gearbox; 261. Connecting arm; 262. Box body; 264. Rotating shaft; 266. Gear; 28. Drive mechanism; 30. Push rod trolley; 31. Push rod connecting block; 32. Push rod; 41. Steel pipe; 42. Mandrel; 51. First material pulling seat; 510. Clamping hole; 52. Second material pulling seat; 61. Hydraulic support; 62. Support column. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention and therefore only show the components relevant to the present invention.

[0016] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0017] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0018] like Figures 1 to 7As shown, a preferred embodiment of the present invention provides a cold drawing device for steel pipes, including two material placement platforms 10, a drawing trolley 20 disposed between the two material placement platforms 10, and two push rod trolleys 30 disposed on both sides of the two material placement platforms 10. The cold drawing device for steel pipes can be used to draw seamless steel pipes.

[0019] The placement platform 10 is used to place steel pipes 41. The steel pipes 41 placed on the left placement platform 10 are uncut steel pipes, and the steel pipes 41 placed on the right placement platform 10 are uncut steel pipes. Each placement platform 10 has a first pulling seat 51 on the side near the pulling trolley 20. Two second pulling seats 52 are connected and fixed at both ends of the pulling trolley 20 corresponding to the first pulling seats 51. Both the first pulling seats 51 and the second pulling seats 52 have multiple clamping holes 510. The structure of the first pulling seats 51 and the second pulling seats 52 is existing technology, used to clamp and lock one end of the steel pipe 41 when it passes through the clamping holes 510. In this embodiment, both the first pulling seats 51 and the second pulling seats 52 have five clamping holes 510, so that the pulling trolley 20 can pull five steel pipes 41 at a time, and the five steel pipes 41 form a group. Preferably, both the material placement platform 10 and the first material extraction seat 51 are equipped with hydraulic supports 61 at their bottoms, which facilitates the adjustment of the height of the material placement platform 10 and the first material extraction seat 51. Preferably, as shown in the example... Figure 3 As shown, the material placement platform 10 is provided with multiple guide grooves 11, which are aligned with multiple clamping holes 510 on the first material extraction seat 51 and the second material extraction seat 52. The cross-section of the guide grooves 11 is arc-shaped. Multiple steel pipes 41 are placed in the multiple guide grooves 11. The material placement platform 10 can be provided with a conveying mechanism below the guide grooves 11 to convey the steel pipes 41 to the first material extraction seat 51, or the steel pipes 41 can be conveyed to the first material extraction seat 51 by means of a hydraulic drive mechanism.

[0020] The pulling trolley 20 includes a slide 22, a toothed plate 24 positioned above the slide 22 and movable left and right along the slide 22, a gearbox 26 positioned above the toothed plate 24 and driven by the toothed plate 24, and a drive mechanism 28 driven by the gearbox 26. The upper surface of the slide 22 is provided with a mounting groove 221 and a wedge-shaped groove 223. A pulley 222 is rotatably mounted in the mounting groove 221. A support column 62 is provided on the lower surface of the slide 22. Two second material pulling seats 52 are symmetrically connected and fixed at both ends of the toothed plate 24. Multiple meshing teeth 242 are provided on the upper surface of the toothed plate 24 along its length. A wedge-shaped slide bar 244 protrudes downward from the lower surface of the toothed plate 24, extending along the length of the toothed plate 24. The slide bar 244 of the toothed plate 24 is embedded in the slide groove 223 of the slide block 22. When the toothed plate 24 slides left and right along the slide block 22, the slide bar 244 slides left and right along the slide groove 223. The lower surface of the toothed plate 24 abuts against the pulley 222 in the mounting groove 221 of the slide block 22. In this embodiment, the drive mechanism 28 is a motor. The gearbox 26 includes a housing 262 and a gear 266 disposed in the housing 262 and connected to the rotating shaft 264. The gear 266 meshes with the meshing teeth 242 on the upper surface of the toothed plate 24 for transmission. The rotating shaft 264 extends out of the housing 262 and is connected and fixed to the output shaft of the motor. The housing 262 and the outer wall of the slide block 22 are connected and fixed through the connecting arm 261.

[0021] The push rod carriage 30 is used to push the mandrel 42 into the steel pipe 41. The push rod carriage 30 has the same structure as the pulling carriage 20, including a slide 22, a toothed plate 24 placed above the slide 22 and movable left and right along the slide 22, a gearbox 26 placed above the toothed plate 24 and connected to the toothed plate 24, and a drive mechanism 28 connected to the gearbox 26. The difference between the push rod carriage 30 and the pulling carriage 20 is that the push rod carriage 30 is connected and fixed to a push rod connecting block 31 at one end near the material table 10. That is, a push rod connecting block 31 is connected and fixed to one end of the toothed plate 24 near the material table 10. Multiple push rods 32 are installed at one end of the push rod connecting block 31 near the material table 10. In this embodiment, there are 5 push rods 32, and a mandrel 42 is installed on each push rod 32.

[0022] When the above-mentioned steel pipe cold drawing device of the present invention is used, the head and tail of the steel pipe 41 to be cold drawn have been necked and placed on the material placement platform 10. The steel pipe 41 placed on the material placement platform 10 on the left side is the steel pipe without head cutting, and the steel pipe 41 placed on the material placement platform 10 on the right side is the steel pipe without tail cutting. One end of the steel pipe 41 to be cold drawn can be transported to the first material drawing seat 51 by the hydraulic drive mechanism. The necked steel pipe 41 is clamped and locked by the first material drawing seat 51. A part of the steel pipe 41 passes through the first material drawing seat 51 and extends toward the drawing trolley 20. The push rod carriage 30 drives the gear 266 via the drive mechanism 28 to rotate, causing the toothed plate 24 to slide along the slide block 22 toward the material placement table 10. This, in turn, moves the push rod 32 and the mandrel 42 toward the steel pipe 41 to be cold-drawn on the material placement table 10. Thus, the push rod carriage 30 pushes the push rod 32 and the mandrel 42 into the steel pipe 41 to be cold-drawn, until the mandrel 42 reaches the necked end of the steel pipe 41 away from the push rod carriage 30. The outer diameter of the mandrel 42 is set to be consistent with the inner diameter of the necked end of the steel pipe 41. Then, the drawing carriage 20 drives the gear 266 via the drive mechanism 28 to rotate, causing the toothed plate 24 to slide left and right along the slide block 22. This, in turn, moves the second drawing seats 52 at both ends of the toothed plate 24 back and forth. Specifically, the pulling trolley 20 first moves to the left, causing the second pulling seat 52 to align with the first pulling seat 51 on the left and lock the portion of the steel pipe 41 extending from the first pulling seat 51. Driven by the drive mechanism 28 and the toothed plate 24, the steel pipe 41 is pulled, achieving simultaneous pulling of five steel pipes 41 with a large pulling force. This allows steel pipes 41 with specifications of φ57~89*4~5mm to be pulled to φ38~60*3.5~4mm. The pulling trolley 20 then moves to the right, causing the second pulling seat 52 to align with the first pulling seat 51 on the right and lock the portion of the steel pipe 41 extending from the first pulling seat 51. Driven by the drive mechanism 28, the steel pipe 41 is then pulled.

[0023] The steel pipe cold drawing device provided by this invention innovates the existing steel pipe cold drawing technology. It arranges two drawing lines symmetrically on the left and right sides with the drawing carriage 20 as the center, making full use of the reciprocating stroke of the drawing carriage 20 to draw the steel pipes 41 without cutting the head and tail on the left and right sides of the drawing carriage 20 respectively. It also realizes the drawing of five steel pipes 41 at one time. After drawing one group of steel pipes 41, it continues to draw another group of steel pipes 41, avoiding the "no-load" phenomenon during the retraction process of the drawing carriage 20 after drawing one group of steel pipes 41. It realizes the reciprocating back and forth work of the drawing carriage 20, which greatly improves the work efficiency.

[0024] Any descriptions not covered in the above specific embodiments of the present invention are known technologies in the field and can be implemented with reference to such known technologies.

[0025] Based on the preferred embodiments of the present invention described above, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A steel pipe cold drawing device, characterized in that: It includes two material placement platforms (10), a pulling trolley (20) located between the two material placement platforms (10), and two push rod trolleys (30) located on both sides of the two material placement platforms (10). Each material placement platform (10) has a first material pulling seat (51) on the side near the pulling trolley (20). The two ends of the pulling trolley (20) are connected and fixed with two second material pulling seats (52) corresponding to the first material pulling seat (51). Both the first material pulling seat (51) and the second material pulling seat (52) are provided with multiple clamping holes (510). The material placement platform (10) is provided with multiple guide grooves (11), which are aligned with multiple clamping holes (510) on the first material extraction seat (51) and the second material extraction seat (52). The cross-section of the guide groove (11) is arc-shaped. The pulling trolley (20) includes a slide (22), a toothed plate (24) placed above the slide (22) and movable left and right along the slide (22), a gearbox (26) placed above the toothed plate (24) and connected to the toothed plate (24) in a transmission, and a drive mechanism (28) connected to the gearbox (26) in a transmission. The two second material pulling seats (52) are symmetrically connected and fixed at both ends of the toothed plate (24). The upper surface of the slide block (22) is provided with a mounting groove (221) and a wedge-shaped sliding groove (223). A pulley (222) is rotatably mounted in the mounting groove (221). The upper surface of the toothed plate (24) is provided with a plurality of meshing teeth (242) along the length direction of the toothed plate. The lower surface of the toothed plate protrudes downward to form a wedge-shaped sliding strip (244). The sliding strip (244) extends along the length direction of the toothed plate (24). The sliding strip (244) of the toothed plate (24) is embedded in the sliding groove (223) of the slide block (22). The lower surface of the toothed plate (24) abuts against the pulley (222) in the mounting groove (221) of the slide block. The drive mechanism (28) is a motor. The gearbox (26) includes a housing (262) and a gear (266) located inside the housing and connected to the rotating shaft (264). The gear (266) meshes with the meshing teeth (242) on the upper surface of the gear plate (24) for transmission. The rotating shaft (264) extends out of the housing (262) and is connected and fixed to the output shaft of the motor. The outer side wall of the housing (262) and the slide (22) are connected and fixed through the connecting arm (261). The push rod trolley (30) has the same structure as the pulling trolley (20). The push rod trolley (30) is connected and fixed to a push rod connecting block (31) at one end near the material placement table (10). Multiple push rods (32) are installed at one end of the push rod connecting block (31) near the material placement table (10).

2. The steel pipe cold drawing device according to claim 1, characterized in that: The bottom of both the material placement platform (10) and the first material extraction seat (51) are equipped with hydraulic supports (61).

3. The cold drawing device for steel pipes according to claim 1, characterized in that: The toothed plate of the push rod trolley (30) is connected and fixed to a push rod connecting block (31) at one end near the material placement table (10).

4. The cold drawing device for steel pipes according to claim 1, characterized in that: The lower surface of the slide (22) is provided with a support column (62).

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