A non-energy-consuming multifunctional protective device for a steel pipe threading machine

Abstract

A multi-functional, energy-free protective device for steel pipe threading machines includes a circular body with at least three mounting bolt holes evenly distributed along its circumference. The outer diameter R1 of the body is smaller than the inner diameter of the front chuck jaws of the threading machine. The inner diameter R3 of the body is smaller than the inner diameter of the threading machine spindle but larger than the outer diameter of the steel pipe being processed. At least four guide vanes, formed by wire cutting or stamping from the body, are evenly distributed along the inner edge of the body. The outer diameter R2 of the guide vanes is smaller than the outer diameter R1 of the body and larger than the inner diameter R3 by 5–20 mm. One end of each guide vane is connected to the body, and the other end protrudes towards one side of the body, with an included angle β of 10–20°. This invention, installed on a threading machine, protects the outer surface of the steel pipe by utilizing the rotation of the threading machine spindle during the threading process. It does not generate additional energy consumption and avoids problems such as residual emulsion and iron filings on the outer surface of the steel pipe during the threading process, effectively improving the overall quality of oil casing products.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe processing technology, specifically to a non-energy-consuming, multi-functional protective device for steel pipe threading machines. Background Technology

[0002] Oil and gas exploration and development require the use of casing and tubing products, which must be connected by threads to form a tubing string and create an extraction channel. The connecting threads are obtained by machining the inner and outer surfaces of the steel pipe ends on a CNC lathe.

[0003] See Figure 1 During the machining process, the steel pipe 100 is clamped by the chuck 200 of the front of the threading machine lathe and rotates at a certain speed. The cutting tool 300 is controlled by the lathe tool post 400 and the tool head 500 to perform axial and radial turning on the inner and outer surfaces of the end of the steel pipe 100. The steel pipe 100 is supported by the tailstock 600 and the inner support 700.

[0004] To improve tool life and steel pipe surface quality, a large amount of emulsion is sprayed during turning to provide cooling and lubrication. However, if emulsion remains on the inner and outer surfaces of the steel pipe (100), it can cause corrosion and environmental pollution. Currently, a waterproof device is commonly installed on the inner surface of the steel pipe during turning to protect it. However, there is currently no such protective device on the outer surface of the steel pipe, resulting in emulsion and small iron filings remaining on the outer surface. The main affected area on the outer surface of the steel pipe (100) is the threaded end and the area A from there to the chuck 200 at the front of the threading machine. Figure 1 As shown.

[0005] Residue on the threaded parts of the steel pipe will be removed manually or with compressed air during subsequent inspections. However, this disrupts the inspection process, and incomplete removal can lead to subsequent rust or scratches from metal filings. Residue at the rear of the pipe body is no longer removed, as this can cause abnormal rusting and affect the final product quality.

[0006] If a certain external surface protection device can be added during the wire cutting process of steel pipes to effectively avoid the residue of emulsion, iron filings and other substances on the outer surface of the steel pipes, the work efficiency can be greatly improved and the product quality can be improved.

[0007] Chinese patent application CN201110362388.6 discloses a chip-blocking and water-blocking device for a metalworking lathe, including a bracket, rollers and baffles. However, the solution is to prevent chip and emulsion inside the lathe from contaminating the external environment of the lathe.

[0008] Chinese patent application number CN202210021184.4 discloses a multi-functional protective cover for a vertical CNC lathe. This patent is also a solution to prevent iron filings and emulsions inside the lathe from contaminating the external environment of the lathe. Summary of the Invention

[0009] The purpose of this utility model is to provide a non-energy-consuming, multi-functional protective device for steel pipe threading machines. This device is installed on the threading machine equipment that must be used in the threading process of oil casing pipes. It protects the outer surface of the steel pipe by means of the rotation of the main shaft of the threading machine during the threading process, without generating additional energy consumption, and avoids problems such as emulsion, iron filings and other residues on the outer surface of the steel pipe during the threading process. It can effectively improve the overall quality of oil casing pipe products.

[0010] To achieve the above objectives, the technical solution of this utility model is as follows:

[0011] A multi-functional, energy-free protective device for a steel pipe threading machine includes a circular body with at least three mounting bolt holes evenly distributed along its circumference. The outer diameter R1 of the body is smaller than the inner diameter of the chuck jaws of the threading machine, ensuring no interference. The inner diameter R3 of the body is smaller than the inner diameter of the threading machine spindle but larger than the outer diameter of the steel pipe being processed. At least four guide vanes, formed by wire cutting or stamping from the body, are evenly distributed along the circumference of the inner edge of the body. The outer diameter R2 of the guide vanes is smaller than the outer diameter R1 of the body but larger than the inner diameter R3 by 5–20 mm. One end of the guide vane is connected to the body, and the other end protrudes towards one side of the body, with an included angle β of 10–20° between the two ends.

[0012] Preferably, the protrusion angle α between the end of the guide vane that protrudes towards the body and the body is 10 to 45°.

[0013] Preferably, the number of guide vanes is 4 to 20.

[0014] Preferably, the inner diameter R3 of the main body is smaller than the inner diameter of the threading machine spindle and larger than the outer diameter of the steel pipe being processed by more than 10mm.

[0015] Preferably, the material of the body is carbon structural steel, lightweight magnesium alloy or aluminum alloy.

[0016] The main body of this invention has at least three mounting bolt holes evenly distributed on a disc for connection to the front chuck on the main spindle of a threading machine. The outer diameter R1 of the main body is determined according to the mounting structure of the front chuck jaws of the threading machine, ensuring it does not interfere with the jaws or other mounting structures. The inner diameter R3 of the main body is determined according to the inner diameter of the threading machine main spindle and the outer diameter of the steel pipe being processed. The inner diameter R3 of the main body is smaller than the inner diameter of the threading machine main spindle and larger than the outer diameter of the steel pipe being processed.

[0017] The guide vane is formed on the body by wire cutting and stamping. That is, the protruding end and the included angle β segment of the guide vane are cut, and then the protrusion deformation is performed according to the protrusion angle α. The uncut end connected to the body is the blade connection end.

[0018] The outer diameter of the guide vane is smaller than the outer diameter R1 of the main body, and larger than the inner diameter R35–20 mm of the main body. The protrusion angle α of the guide vane is between 10 and 45°. The included angle β between the two ends of the guide vane is between 10 and 20°. The protrusion height h of the guide vane is determined by the protrusion angle α and the included angle β.

[0019] The beneficial effects of this utility model are:

[0020] The present invention has several guide vanes arranged on the inner edge of the main body. The main body is connected to the front chuck on the main spindle of the thread cutting machine by bolts, so as to achieve the same speed as the main spindle. During the rotation, the guide vanes play a role in changing the surrounding airflow, forming an airflow that blows from the front chuck of the lathe into the lathe, covering the area of ​​the original steel pipe affected by processing residue, and effectively blowing away the emulsion and iron filings.

[0021] After the main body of this utility model is installed, it will rotate at the same speed as the spindle, without the need for additional intervention or operation. The guide vanes play a role in changing the surrounding airflow during the rotation, forming an airflow that blows from the front chuck of the lathe into the lathe, covering the area on the outer surface of the original steel pipe affected by processing residue, and effectively blowing away the emulsion and iron filings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an existing steel pipe threading machine;

[0023] Figure 2 This is a perspective view of an embodiment of the present utility model;

[0024] Figure 3 This is a front view of an embodiment of the present utility model;

[0025] Figure 4 for Figure 3 AA cross-section view;

[0026] Figure 5 This is an installation diagram of an embodiment of the present utility model. Detailed Implementation

[0027] See Figures 2-5The present invention relates to a multi-functional, energy-saving protective device for a steel pipe threading machine. The device comprises a body 1 that is an annular ring with at least three mounting bolt holes 101 evenly distributed along its circumference. The outer diameter R1 of the body 1 is smaller than the inner diameter of the jaws 201 of the front chuck 200 of the threading machine, ensuring no interference with the jaws 201. The inner diameter R3 of the body 1 is smaller than the inner diameter of the main shaft 800 of the threading machine, but larger than the outer diameter of the steel pipe 100 being processed. At least four guide vanes 11, formed by wire cutting or stamping, are evenly distributed along the inner edge of the body 1. The outer diameter R2 of the guide vanes 11 is smaller than the outer diameter R1 of the body 1, but larger than the inner diameter R3 of the body 1 by 5-20 mm. One end of the guide vane 11 is connected to the body 1, and the other end protrudes towards one side of the body 1, with an included angle β of 10-20° between the two ends.

[0028] Preferably, the protrusion angle α between the end of the guide vane 11 that protrudes toward the body 1 and the body 1 is 10 to 45°.

[0029] Preferably, the number of guide vanes 11 is 4 to 20.

[0030] Preferably, the inner diameter R3 of the body 1 is more than 10 mm larger than the outer diameter of the processed steel pipe 100.

[0031] Preferably, the material of the body 1 is carbon structural steel, lightweight magnesium alloy or aluminum alloy.

[0032] When using this utility model, the main body 1 protrudes outward from the lathe (from the front chuck end to the threading machine spindle end) and is fastened to the front chuck 200 with (M8) bolts 900. After installation, the threading process generates a noticeable airflow blowing towards the end of the steel pipe, significantly reducing the amount of fine iron filings at the threaded end of the pipe and reducing water residue on the outer surface of the steel pipe by more than 400mm. This effectively protects the steel pipe from iron filings and emulsion residue.

[0033] Example

[0034] The steel pipe with an outer diameter of 140mm is threaded. The inner diameter of the main shaft of the threading machine is 190mm, the outer diameter of the body is R1 235mm, R2 197mm, R3 175mm, and there are 12 guide vanes 11 with α 20°, β 15°, and h 9.5mm.

Claims

1. A zero-energy, multi-functional protective device for a steel pipe threading machine, characterized in that, Its main body is a circular ring with at least three mounting bolt holes evenly arranged along its circumference. The outer diameter R1 of the main body is smaller than the inner diameter of the chuck jaws of the thread cutting machine, so as not to interfere with the jaws. The inner diameter R3 of the main body is smaller than the inner diameter of the thread cutting machine spindle and larger than the outer diameter of the steel pipe being processed. At least four guide vanes formed by wire cutting or stamping of the main body are evenly arranged along the circumference of the inner edge of the main body. The outer diameter R2 of the guide vanes is smaller than the outer diameter R1 of the main body and larger than the inner diameter R3 of the main body by 5 to 20 mm. One end of the guide vane is connected to the main body, and the other end protrudes to one side of the main body, with the included angle β between the two ends being 10 to 20°.

2. The energy-saving multi-functional protective device for steel pipe threading machines as described in claim 1, characterized in that, The angle α between the protruding end of the guide vane towards the body and the body is 10 to 45°.

3. The energy-saving multi-functional protective device for steel pipe threading machines as described in claim 1 or 2, characterized in that, The number of guide vanes is 4 to 20.

4. The energy-saving multi-functional protective device for steel pipe threading machines as described in claim 1 or 2, characterized in that, The inner diameter R3 of the main body is smaller than the inner diameter of the threading machine spindle and is more than 10mm larger than the outer diameter of the steel pipe being processed.

5. The energy-saving multi-functional protective device for steel pipe threading machines as described in claim 1 or 2, characterized in that, The body is made of carbon structural steel, lightweight magnesium alloy, or aluminum alloy.

6. The energy-saving multi-functional protective device for steel pipe threading machines as described in claim 4, characterized in that, The body is made of carbon structural steel, lightweight magnesium alloy, or aluminum alloy.

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