Roundness correction device for nodular cast iron pipe

Abstract

The utility model discloses a spheroidal graphite cast iron pipe roundness correction device, which belongs to the technical field of spheroidal graphite cast iron pipe correction equipment, and comprises a base, an annular roundness correction mechanism arranged on the base and sleeved outside a spheroidal graphite cast iron pipe, and a control mechanism for driving the annular roundness correction mechanism to perform roundness correction operation on the spheroidal graphite cast iron pipe in the radial direction, the annular roundness correction mechanism comprises annular outer discs fixedly arranged on the two sides of the base correspondingly, a rotary disc concentrically arranged between the two annular outer discs and controlled by the control mechanism to rotate and a plurality of roundness correction sliding blocks evenly arranged in the circumferential direction of the annular outer discs at intervals, and the two ends of each roundness correction sliding block are slidably connected with the two annular outer discs correspondingly. A plurality of inclined sliding grooves corresponding to the round calibration sliding blocks are formed in the rotary disc in a penetrating mode, and the round calibration sliding blocks are movably connected with the inclined sliding grooves. The roundness correction device is simple in structure and easy and convenient to operate, saves economic cost and has a good roundness correction function.

Description

Technical Field

[0001] The utility model belongs to the technical field of ductile iron pipe correction equipment, and in particular relates to a ductile iron pipe roundness correction device. Background Art

[0002] As an excellent pipe material, ductile iron pipes are widely used in urban water supply, drainage, oil transportation, gas transportation and other fields. However, in the production process, due to the limitations of the centrifugal casting process, such as the misalignment of the pipe mold center and the rotation center and the instability of process parameters, the molten iron is often unevenly distributed in the axial and circumferential directions, making the ductile iron pipe prone to elliptical deformation, affecting the sealing performance and service life of the pipeline system. Therefore, rounding the ductile iron pipe is an important part of the production process.

[0003] Traditional rounding devices are mostly operated manually, which is labor-intensive and has low rounding efficiency. They cannot meet the needs of modern large-scale production. In addition, the quality of manual rounding is also affected by the skills and experience of the operator, and the consistency is poor. Although the existing automatic rounding devices have solved the shortcomings of manual operation to a certain extent and improved the rounding efficiency and consistency, the structures of these devices are often more complicated and the manufacturing costs are higher. Due to their complex structures, they are also difficult to maintain, which greatly increases the production costs. Therefore, there is a need for a ductile iron pipe rounding device with a simple structure, easy operation and higher economic benefits and good rounding function. Utility Model Content

[0004] The utility model aims to provide a ductile iron pipe rounding device, which has a simple structure, is easy to operate, saves economic costs and has a good rounding function.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A ductile iron pipe rounding device comprises a base, an annular rounding mechanism arranged on the base and sleeved on the outside of the ductile iron pipe, and a control mechanism driving the annular rounding mechanism to radially round the ductile iron pipe; the annular rounding mechanism comprises annular outer disks fixedly arranged on both sides of the base, a turntable concentrically arranged between the two annular outer disks and controlled to rotate by the control mechanism, and a plurality of rounding sliders evenly spaced along the circumference of the annular outer disks and slidably connected to the two annular outer disks at both ends; a plurality of inclined slide grooves corresponding to the respective rounding sliders are formed through the turntable, and the rounding sliders are movably connected to the inclined slide grooves.

[0007] A further improvement of the technical solution of the utility model is that a plurality of arc-shaped rotating grooves are evenly spaced and penetrated through the rotating disk along its circumference, and a rotating shaft penetrating through each of the arc-shaped rotating grooves is fixedly connected between the two annular outer disks.

[0008] A further improvement of the technical solution of the utility model is that when the turntable rotates clockwise, the inclined chute is radially inclined to the right, and when the turntable rotates counterclockwise, the inclined chute is radially inclined to the left.

[0009] The further improvement of the technical solution of the utility model is that: the radial inclination angle of the inclined chute is a, 30°≤a≤60°; at least 3 arc-shaped turning grooves are provided, and at least 6 inclined chute grooves are provided.

[0010] A further improvement of the technical solution of the utility model is that the rounding slider includes an "H"-shaped bracket, a sliding shaft passing through the inclined sliding groove and both ends of the sliding shaft are fixed to one end of the "H"-shaped bracket, and a rounding roller is arranged on the other side of the "H"-shaped bracket through a pin shaft.

[0011] A further improvement of the technical solution of the utility model is that: the two annular outer disks are respectively provided with a plurality of grooves adapted to the circle correction slider along their inner circumferences, and the grooves are slidably connected to the "H"-shaped bracket of the circle correction slider through slide rails arranged on both sides thereof.

[0012] A further improvement of the technical solution of the utility model is that the control mechanism includes a connecting rod mechanism connected to the rotating disk and an oil cylinder connected to the connecting rod mechanism.

[0013] Due to the adoption of the above technical solution, the technical progress achieved by the utility model is:

[0014] The utility model has the advantages of simple structure, easy operation, reduced labor, economic cost and good roundness correction function.

[0015] The rotating disk and the annular outer disk adopted in the utility model can cooperate to enable a plurality of roundness correction sliding blocks to move centripetally at the same time to perform roundness correction operation on the rotating ductile iron pipe.

[0016] The utility model adopts the method of arranging mutually matching arc-shaped rotating grooves and rotating shafts on the rotating disk, so that the rotating disk can rotate concentrically relative to the annular outer disk under the control of the control mechanism.

[0017] The utility model adopts a method of arranging a plurality of inclined slide grooves on the turntable to cooperate with a plurality of grooves on the annular outer disk. When the turntable rotates under the control of a control mechanism, a plurality of circle correction sliding blocks connected to the inclined slide grooves through a sliding shaft and to the grooves through a sliding rail can slide simultaneously along the path of the inclined slide grooves toward the ductile iron pipe located at the center of the circle, thereby achieving the purpose of circle correction operation on the ductile iron pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the circularity calibration device of the utility model;

[0019] Figure 2It is a schematic diagram of the circle calibration device of the utility model when performing circle calibration operation;

[0020] Figure 3 It is a structural schematic diagram of the turntable of the circularity calibration device of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the annular outer disk of the circular calibration device of the utility model;

[0022] Figure 5 It is a structural schematic diagram of a circle correction slider of the circle correction device of the utility model;

[0023] Figure 6 It is a side view structural schematic diagram of the circularity correction device of the utility model;

[0024] Among them, 1. base, 2. ductile iron pipe, 3. annular outer disk, 3-1. groove, 4. turntable, 4-1. arc-shaped turning groove, 4-2. rotating shaft, 4-3. inclined slide groove, 5. rounding slider, 5-1. "H"-shaped bracket, 5-2. sliding shaft, 5-3. rounding roller, 6. connecting rod mechanism, 7. oil cylinder. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the embodiments:

[0026] like Figure 1 as well as Figure 3-Figure 6 As shown, a ductile iron pipe rounding device includes a base 1, an annular rounding mechanism arranged on the base 1 and a control mechanism for driving the annular rounding mechanism. The annular rounding mechanism is sleeved on the outside of the ductile iron pipe 2 and can radially align the ductile iron pipe 2 under the control of the control mechanism.

[0027] Specifically, the annular rounding mechanism includes two annular outer disks 3, a rotating disk 4, and a plurality of rounding sliders 5 evenly spaced along the circumference of the annular outer disks 3. The two ends of the rounding sliders 5 are respectively connected to the two annular outer disks 3 in a sliding manner. The two annular outer disks 3 are respectively fixedly arranged on both sides of the base 1. The rotating disk 4 is concentrically arranged between the two annular outer disks 3. The rotating disk 4 can rotate concentrically relative to the annular outer disks 3 under the control of the control mechanism. Under the rotation of the rotating disk 4, a plurality of rounding sliders 5 can simultaneously move centripetally to perform rounding operations on the ductile iron pipe 2. The control mechanism includes a connecting rod mechanism 6 and an oil cylinder 7 connected to the rotating disk 4. The oil cylinder 7 is connected to and drives the connecting rod mechanism 6 to move so that the rotating disk 4 rotates.

[0028] Specifically, the turntable 4 is provided with a plurality of arc-shaped grooves 4-1 evenly spaced along its circumference, and a rotating shaft 4-2 penetrating through each of the arc-shaped grooves 4-1 is fixedly connected between the two annular outer disks 3. Under the control of the control mechanism, the turntable 4 can rotate a certain angle with the rotating shaft 4-2 through a plurality of mutually cooperating arc-shaped grooves 4-1, and at least three arc-shaped grooves 4-1 are provided.

[0029] The turntable 4 is also provided with inclined chutes 4-3 evenly spaced along its circumference. The inclined chutes 4-3 are arranged corresponding to the rounding slider 5. The rounding slider 5 is movably connected to the inclined chutes 4-3 so that the rounding slider 5 can move centripetally along the path of the inclined chutes 4-3 when the turntable 4 rotates. The number of inclined chutes 4-3 and the rounding slider 5 is the same, and at least 6 are arranged, so as to ensure that uniform strength can be applied to the outside of the ductile iron pipe 2 for rounding operation. When the turntable 4 rotates clockwise, the inclined chutes 4-3 are radially tilted to the right, and when the turntable 4 rotates counterclockwise, the inclined chutes 4-3 are radially tilted to the left. Too large or too small radial inclination angle of the inclined chutes 4-3 is not conducive to the movement of the rounding slider 5. Therefore, the radial inclination angle of the inclined chutes 4-3 is a, 30°≤a≤60°, preferably, a=45°.

[0030] Since the rotation angle of the turntable 4 depends on the curvature of the arc-shaped groove 4-1, the curvature of the arc-shaped groove 4-1 and the length of the inclined slide groove 4-3 should be set in coordination so that after the turntable 4 rotates a certain angle, the rounding slider 5 just moves centripetally to contact the outside of the ductile iron pipe 2, thereby ensuring that the rounding operation can be carried out smoothly.

[0031] The roundness correction slider 5 includes an "H"-shaped bracket 5-1, a sliding shaft 5-2 fixedly arranged at one end of the "H"-shaped bracket 5-1, and a roundness correction roller 5-3 arranged at the other end of the "H"-shaped bracket 5-1 through a pin shaft. The sliding shaft 5-2 is arranged through the inclined slide groove 4-3, so that the roundness correction slider 5 can move along the inclined slide groove 4-3. The two annular outer disks 3 are respectively provided with a plurality of grooves 3-1 adapted to the roundness correction slider 5 along their inner circumferences. The grooves 3-1 are slidably connected to the "H"-shaped bracket 5-1 of the roundness correction slider 5 through the slide rails arranged on both sides thereof, thereby ensuring that the roundness correction slider 5 slides centripetally along the path of the inclined slide groove 4-3.

[0032] like Figure 2 As shown, during operation, the cylinder 7 is started to drive the connecting rod mechanism 6 to make the turntable 4 rotate concentrically relative to the annular outer disk 3, causing the circumferentially evenly distributed calibration sliders 5 to slide centripetally along the path of the inclined slide groove 4-3, so that the calibration rollers 5-3 at the front end of each calibration slider 5 simultaneously contact the ductile iron pipe 5 and perform the calibration operation.

[0033] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A ductile iron pipe rounding device, characterized in that: The invention comprises a base (1), an annular rounding mechanism arranged on the base (1) and sleeved on the outside of a ductile iron pipe (2), and a control mechanism driving the annular rounding mechanism to radially round the ductile iron pipe (2); the annular rounding mechanism comprises annular outer disks (3) respectively fixedly arranged on both sides of the base (1), a rotating disk (4) concentrically arranged between the two annular outer disks (3) and controlled to rotate by the control mechanism, and a plurality of rounding sliders (5) evenly spaced along the circumference of the annular outer disks (3) and slidably connected to the two annular outer disks (3) at both ends; the rotating disk (4) is provided with a plurality of inclined slide grooves (4-3) corresponding to the respective rounding sliders (5), and the rounding sliders (5) are movably connected to the inclined slide grooves (4-3).

2. A ductile iron pipe rounding device according to claim 1, characterized in that: The rotating disk (4) is provided with a plurality of arc-shaped rotating grooves (4-1) at even intervals along its circumference, and a rotating shaft (4-2) that passes through each of the arc-shaped rotating grooves (4-1) is fixedly connected between the two annular outer disks (3).

3. A ductile iron pipe rounding device according to claim 2, characterized in that: When the rotating disk (4) rotates clockwise, the inclined chute (4-3) is radially inclined to the right, and when the rotating disk (4) rotates counterclockwise, the inclined chute (4-3) is radially inclined to the left.

4. A ductile iron pipe rounding device according to claim 3, characterized in that: The radial inclination angle of the inclined slide groove (4-3) is a, 30°≤a≤60°; at least three arc-shaped turning grooves (4-1) are provided, and at least six inclined slide grooves (4-3) are provided.

5. A ductile iron pipe rounding device according to any one of claims 1 to 4, characterized in that: The roundness correction slider (5) comprises an "H"-shaped bracket (5-1), a sliding shaft (5-2) that passes through the inclined sliding groove (4-3), the two ends of the sliding shaft (5-2) being fixed to one end of the "H"-shaped bracket (5-1), and a roundness correction roller (5-3) that is arranged at the other end of the "H"-shaped bracket (5-1) via a pin shaft.

6. A ductile iron pipe rounding device according to claim 5, characterized in that: The two annular outer disks (3) are respectively provided with a plurality of grooves (3-1) along their inner circumferences adapted to the circular alignment slider (5); the grooves (3-1) are slidably connected to an "H"-shaped bracket (5-1) of the circular alignment slider (5) via slide rails provided on both sides thereof.

7. A ductile iron pipe rounding device according to any one of claims 1 to 4, characterized in that: The control mechanism comprises a connecting rod mechanism (6) connected to the rotating disk (4) and an oil cylinder (7) connected to the connecting rod mechanism (6).

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