Device for eliminating residual stress of cold drawn pipe

Abstract

The utility model discloses a device for eliminating residual stress of a cold drawn pipe, which relates to the technical field of cold drawn pipe processing and comprises a bottom plate, a vertical plate is fixed on the upper end face of the bottom plate, a through hole is arranged on the vertical plate, a fixing frame is arranged on the upper end face of the bottom plate and positioned on one side of the vertical plate, and a heating coil is arranged on the inner side of the fixing frame. A first L-shaped pipeline is fixed to one side of the vertical plate, an annular pipe is connected to one end of the first L-shaped pipeline, first water spraying holes are formed in the annular pipe at equal intervals, a second L-shaped pipeline is fixed to one end of the bottom plate, and second water spraying holes are formed in the end, close to the annular pipe, of the second L-shaped pipeline at equal intervals; the horizontal section of the second L-shaped pipeline is located in the middle of the annular pipe. According to the utility model, the cold-drawn pipe is heated by the heating coil, and then the cold-drawn pipe is synchronously cooled from the outside and inside, so that the residual stress of the cold-drawn pipe is eliminated, and the processing quality of the cold-drawn pipe is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to cold-drawn pipe processing technical field especially relates to a device that eliminates the residual stress of cold-drawn pipe. BACKGROUND

[0002] When lining the steel pipe, the inner and outer surfaces of the steel pipe are affected by friction force, and the metal flow rate is relatively consistent. In terms of pipe wall thickness, the flow rate of the center layer metal is faster than that of the inner and outer surface layers. Therefore, the plastic deformation of the lined steel pipe is also uneven. Affected by uneven deformation and cold deformation hardening, additional stress is generated between the inner and outer layers and the center layer of the cold-drawn steel pipe. This additional stress remains in the steel pipe after cold drawing, thereby forming residual stress. The most simple and easy method to eliminate the residual stress of the cold-drawn steel pipe is stress relief annealing.

[0003] During low-temperature annealing of the cold-drawn pipe, the heat inside the low-temperature annealing furnace is not uniform, which makes the low-temperature annealing of the cold-drawn pipe incomplete and difficult to eliminate the residual stress of the cold-drawn pipe. Therefore, the present application provides a device for eliminating the residual stress of the cold-drawn pipe. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a device for eliminating the residual stress of the cold-drawn pipe, which heats the cold-drawn pipe through a heating coil, then cools it down synchronously from the outside and inside of the cold-drawn pipe, thereby eliminating the residual stress of the cold-drawn pipe and ensuring the processing quality of the cold-drawn pipe, overcoming the deficiencies of the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A device for eliminating the residual stress of the cold-drawn pipe, comprising a bottom plate, a vertical plate fixed to the upper end surface of the bottom plate, a through hole formed in the vertical plate, a fixed frame installed on the upper end surface of the bottom plate and located on one side of the vertical plate, a heating coil arranged inside the fixed frame, a first L-shaped pipe fixed to one side of the vertical plate, a ring-shaped pipe connected to one end of the first L-shaped pipe, first water spray holes equally spaced on the ring-shaped pipe, a second L-shaped pipe fixed to one end of the bottom plate, second water spray holes equally spaced on one end of the second L-shaped pipe close to the ring-shaped pipe, and a drive assembly installed on one end of the upper end surface of the bottom plate.

[0007] As a further scheme of the utility model: the horizontal section of the second L-shaped pipe is located in the middle of the ring-shaped pipe.

[0008] As a further scheme of the utility model: the other end of the first L-shaped pipe is connected to a first electromagnetic valve, and a water supply pipe is connected to one end of the first electromagnetic valve.

[0009] As a further scheme of the utility model: the other end of the second L-shaped pipeline is connected with a second electromagnetic valve, and the one end of the second electromagnetic valve is externally connected with a water supply pipeline.

[0010] As a further scheme of the utility model: the driving assembly comprises a U-shaped frame fixed to one end of the upper end surface of the bottom plate, two driving groove wheels are rotatably installed between the vertical sections of the two sides of the U-shaped frame through bearings, a first servo motor is installed on the outer wall of one side of the U-shaped frame, one end of the two driving groove wheels extends to the outer side of the U-shaped frame and is connected with a gear, the two gears are meshed with each other, and the output end of the first servo motor is connected with one end of one of the driving groove wheels.

[0011] As a further scheme of the utility model: the first U-shaped support seat is fixed to the upper end surface of the bottom plate and located between the vertical plate and the fixed frame, a support groove wheel is rotatably installed on the inner wall of the first U-shaped support seat, and a second servo motor is installed on the outer wall of the first U-shaped support seat, and the output end of the second servo motor is connected with one end of the support groove wheel.

[0012] As a further scheme of the utility model: the second U-shaped support seat and the third U-shaped support seat are fixed to the upper end surface of the bottom plate and located below the second L-shaped pipeline, support groove wheels are rotatably installed on the inner walls of the second U-shaped support seat and the third U-shaped support seat, second servo motors are installed on the outer walls of the second U-shaped support seat and the third U-shaped support seat, and the output ends of the two second servo motors are respectively connected with the two support groove wheels.

[0013] As a further scheme of the utility model: the one end of the through hole close to the fixed frame is fixed with a conical waterproof cover.

[0014] The utility model discloses beneficial effects are:

[0015] The heating coil is used for heating the cold-drawn pipe, and then the cold-drawn pipe is cooled and cooled from the outside and the inside, so that the residual stress of the cold-drawn pipe is eliminated, and the processing quality of the cold-drawn pipe is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the first perspective three-dimensional structure schematic diagram of the device for eliminating the residual stress of the cold-drawn pipe provided by the utility model.

[0017] Figure 2 It is the second perspective three-dimensional structure schematic diagram of the device for eliminating the residual stress of the cold-drawn pipe provided by the utility model.

[0018] Figure 3 It is the third perspective three-dimensional structure schematic diagram of the device for eliminating the residual stress of the cold-drawn pipe provided by the utility model.

[0019] Figure 4The utility model provides a device for eliminating residual stress of cold-drawn pipe Figure 2 The enlarged structural schematic diagram of the middle A.

[0020] In the drawing: 1, bottom plate; 2, second U-shaped support seat; 3, second servo motor; 4, second L-shaped pipeline; 5, third U-shaped support seat; 6, vertical plate; 7, first U-shaped support seat; 8, heating coil; 9, first servo motor; 10, driving recessed wheel; 11, U-shaped frame; 12, fixed frame; 13, conical waterproof cover; 14, first electromagnetic valve; 15, first L-shaped pipeline; 16, annular pipe; 17, through hole; 18, gear; 19, first water spraying hole; 20, second water spraying hole. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0022] Embodiment 1, refer to Figures 1-4 A device for eliminating residual stress of cold-drawn pipe, including bottom plate 1, the upper end surface of bottom plate 1 is fixed with vertical plate 6, vertical plate 6 is opened with through hole 17, the upper end surface of bottom plate 1 and the side of vertical plate 6 are installed with fixed frame 12, the inner side of fixed frame 12 is provided with heating coil 8, the side of vertical plate 6 is fixed with first L-shaped pipeline 15, one end of first L-shaped pipeline 15 is connected with annular pipe 16, annular pipe 16 is opened with first water spraying hole 19 at equal distance, one end of bottom plate 1 is fixed with second L-shaped pipeline 4, the end of second L-shaped pipeline 4 close to annular pipe 16 is opened with second water spraying hole 20 at equal distance, the horizontal section of second L-shaped pipeline 4 is located in the middle of annular pipe 16.

[0023] The other end of first L-shaped pipeline 15 is connected with first electromagnetic valve 14, the other end of second L-shaped pipeline 4 is connected with second electromagnetic valve, the one end of first electromagnetic valve 14 and second electromagnetic valve is all connected with water supply pipeline, by opening first electromagnetic valve 14, first water spraying hole 19 can spray water, by opening second electromagnetic valve, second water spraying hole 20 can spray water.

[0024] The upper end surface of bottom plate 1 is installed with driving assembly, driving assembly includes the U-shaped frame 11 of being fixed on the upper end surface of bottom plate 1 one end, two driving recessed wheels 10 are rotatably installed between the vertical section of both sides of U-shaped frame 11 through bearing, the outer wall of the side of U-shaped frame 11 is installed with first servo motor 9, one end of two driving recessed wheels 10 extends to the outside of U-shaped frame 11 and is connected with gear 18, two gears 18 are meshed with each other, the output end of first servo motor 9 is connected with one end of one of two driving recessed wheels 10.

[0025] The first servo motor 9 drives the two driving grooved wheels 10 to rotate through the meshing effect of the end gear 18 of the two driving grooved wheels 10, and the cold-drawing pipe is arranged between the two driving grooved wheels 10, and under the rotating effect of the driving grooved wheels 10, the cold-drawing pipe moves towards the heating coil 8, and then the cold-drawing pipe passes through the heating coil 8, the heating coil 8 heats the cold-drawing pipe, the cold-drawing pipe continues to move and passes through the annular pipe 16, and the cold-drawing pipe is sleeved outside the horizontal section of the second L-shaped pipe 4, with the movement of the cold-drawing pipe, the first water spraying hole 19 on the annular pipe 16 sprays water to cool the outside of the cold-drawing pipe, the second water spraying hole 20 at the end of the second L-shaped pipe 4 sprays water to cool the inside of the cold-drawing pipe, and then the residual stress of the cold-drawing pipe is eliminated.

[0026] In the embodiment 2, the embodiment is optimized on the basis of the embodiment 1, and specifically:

[0027] The first U-shaped support seat 7 is fixed to the upper end surface of the bottom plate 1 and located between the vertical plate 6 and the fixed frame 12, the inner wall of the first U-shaped support seat 7 is rotatably installed with a supporting grooved wheel, and the outer wall of the first U-shaped support seat 7 is installed with a second servo motor 3, and the output end of the second servo motor 3 is connected with one end of the supporting grooved wheel.

[0028] The second U-shaped support seat 2 and the third U-shaped support seat 5 are fixed to the upper end surface of the bottom plate 1 and located below the second L-shaped pipe 4, the inner walls of the second U-shaped support seat 2 and the third U-shaped support seat 5 are rotatably installed with supporting grooved wheels, and the outer walls of the second U-shaped support seat 2 and the third U-shaped support seat 5 are installed with second servo motors 3, and the output ends of the two second servo motors 3 are respectively connected with the two supporting grooved wheels.

[0029] When the driving assembly drives the cold-drawing pipe to move, the second servo motor 3 is started, each second servo motor 3 drives the supporting grooved wheel connected therewith, so that when the cold-drawing pipe reaches above the supporting grooved wheel, the supporting grooved wheel supports the cold-drawing pipe to avoid shaking of the cold-drawing pipe in the moving process, thereby maintaining stability.

[0030] The through hole 17 is fixed with a conical waterproof cover 13 at one end close to the fixed frame 12, and the cold-drawing pipe passes through the conical waterproof cover 13 in the moving process, and the conical waterproof cover 13 can prevent water from splashing on the heating coil 8, thereby avoiding damage to the heating coil 8.

[0031] The above only describes a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A device for eliminating residual stress of a cold-drawn tube, comprising a base plate (1), characterized in that: A vertical plate (6) is fixed to the upper end surface of the base plate (1), and a through hole (17) is provided on the vertical plate (6). A fixing frame (12) is installed on the upper end surface of the base plate (1) and located on one side of the vertical plate (6). A heating coil (8) is provided on the inner side of the fixing frame (12). A first L-shaped pipe (15) is fixed to one side of the vertical plate (6), and one end of the first L-shaped pipe (15) is connected to an annular pipe (16), and first water spray holes (19) are provided on the annular pipe (16) at equal distances. A second L-shaped pipe (4) is fixed to one end of the base plate (1), and a second water spray hole (20) is provided at equal distances on one end of the second L-shaped pipe (4) close to the annular pipe (16). A driving component is installed on one end of the upper end surface of the base plate (1).

2. The device for eliminating residual stress of cold-drawn tube according to claim 1, characterized in that: The horizontal section of the second L-shaped pipe (4) is located in the middle of the annular pipe (16).

3. The device for eliminating residual stress of cold-drawn tube according to claim 1, characterized in that: The other end of the first L-shaped pipe (15) is connected to a first solenoid valve (14), and one end of the first solenoid valve (14) is externally connected to a water supply pipe.

4. The device for eliminating residual stress of cold-drawn tube according to claim 1, characterized in that: The other end of the second L-shaped pipe (4) is connected to a second solenoid valve, and one end of the second solenoid valve is externally connected to a water supply pipe.

5. The device for eliminating residual stress of cold-drawn tube according to claim 1, characterized in that: The driving assembly comprises a U-shaped frame (11) fixed to one end of the upper end surface of the base plate (1); two driving groove wheels (10) are rotatably mounted between vertical sections on both sides of the U-shaped frame (11) via bearings; a first servo motor (9) is mounted on an outer wall of one side of the U-shaped frame (11); one end of the two driving groove wheels (10) extends to the outside of the U-shaped frame (11) and is connected to a gear (18); the two gears (18) are meshed with each other; and an output end of the first servo motor (9) is connected to one end of one of the driving groove wheels (10).

6. The device for eliminating residual stress of cold-drawn tube according to claim 1, characterized in that: A first U-shaped support seat (7) is fixed on the upper end surface of the base plate (1) and located between the vertical plate (6) and the fixed frame (12); a supporting groove wheel is rotatably mounted on the inner wall of the first U-shaped support seat (7); a second servo motor (3) is mounted on the outer wall of the first U-shaped support seat (7); and an output end of the second servo motor (3) is connected to one end of the supporting groove wheel.

7. The device for eliminating residual stress of cold-drawn tube according to claim 6, characterized in that: A second U-shaped support seat (2) and a third U-shaped support seat (5) are fixed to the upper end surface of the base plate (1) and located below the second L-shaped pipe (4); support groove wheels are rotatably mounted on the inner walls of the second U-shaped support seat (2) and the third U-shaped support seat (5); second servo motors (3) are mounted on the outer walls of the second U-shaped support seat (2) and the third U-shaped support seat (5); and the output ends of the two second servo motors (3) are respectively connected to the two support groove wheels.

8. The device for eliminating residual stress of cold-drawn tube according to claim 1, characterized in that: A conical waterproof cover (13) is fixed to one end of the through hole (17) close to the fixing frame (12).

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