Polyethylene lined steel pipe with pipe turning prompt function and preparation method thereof

Abstract

A polyethylene lined steel pipe with a pipe turning prompt function and a preparation method thereof, belonging to the field of new material technology, provides a polyethylene lined steel pipe turning prompt function based on the Hall effect, solves the problem of uneven wear of the lining caused by untimely turning, more effectively prolongs the service life of the pipeline, and reduces production costs. The lack of connection between the Hall sensor element and the circular magnetic film reduces the stress concentration point in the sensor.

Description

Technical Field

[0001] The invention belongs to the technical field of new materials, and in particular relates to a polyethylene lined steel pipe with a pipe turning prompt function and a preparation method thereof. Background Art

[0002] As mentioned in the prior art of patent application number CN202311562943.9, polyethylene lined steel pipes are widely used. Polyethylene lined steel pipes have excellent properties such as high pressure resistance, corrosion resistance, low conveying resistance, and wear resistance, and are widely used in the mining industry. In order to extend the service life of the pipeline and reduce production costs, it is necessary to regularly flip the pipeline at a certain angle so that the degree of wear on the circumferential direction of the pipeline lining is similar. At present, regular flipping is generally adopted, which has the disadvantage of flipping too early or too late, resulting in large differences in circumferential wear of the lining. Summary of the invention

[0003] In order to address the defects in the prior art, the present invention proposes a polyethylene lined steel pipe with a pipe turning reminder function and a preparation method thereof, which solves the problem of uneven wear of the lining caused by untimely turning, more effectively extends the service life of the pipeline and reduces production costs.

[0004] The present invention uses the following technical solutions.

[0005] A method for preparing a polyethylene lined steel pipe with a pipe turning prompt function, comprising:

[0006] S01, first weighing polyethylene resin, taking the polyethylene resin as a base, adding 40-70% of magnetic powder filler by weight and stirring and mixing; calendering to prepare a magnetic film, and cutting the obtained circular magnetic film;

[0007] S02, placing the Hall sensor element at the bottom of the mold, and pouring a polyethylene cylinder with a diameter of 20-50 mm; after pouring, placing a circular magnetic film just above the Hall sensor element, and pressing it horizontally into the poured molten polyethylene to form a casting;

[0008] S03, magnetizing the magnetic film in the sensor prepared in S02 in the thickness direction in a magnetizing machine, thus manufacturing a Hall sensor;

[0009] S04. Adhere 3 Hall sensors prepared in S03 to the pipe wall. The sensors are evenly distributed in the circumferential direction with an interval angle of 120°. All leg wires are led out from the flange. Then, a polyethylene lining is processed on the inner wall of the steel pipe by centrifugal method. After being stored at room temperature for 3 days, the polyethylene-based sensor can be buried.

[0010] Furthermore, the material of the magnetic powder filler is a mixture of one or more of manganese-zinc ferrite, neodymium-iron-boron, aluminum-iron-boron, iron-silicon, and iron-silicon-aluminum in equal amounts.

[0011] Furthermore, the magnetic powder filler is made of neodymium iron boron powder.

[0012] Furthermore, the particle size of the magnetic powder filler is 3-10 μm.

[0013] Furthermore, the stirring and mixing takes 2-5 minutes.

[0014] Furthermore, the thickness of the magnetic film is 0.2-1 mm.

[0015] Furthermore, the diameter of the circular magnetic film is 5-10 mm.

[0016] Furthermore, the thickness of the Hall sensor element is 0.5-1 mm.

[0017] Furthermore, after forming, the height of the entire casting is 10-15 mm, the Hall sensor element is located at the bottom, and the circular magnetic film is located directly above the Hall sensor element.

[0018] Furthermore, the magnetization time is 1.5s, the magnetization current is 20KA, and the magnetization voltage is DC2000V. After the circular magnetic film is magnetized, a Hall voltage is generated in the powered Hall sensor.

[0019] A polyethylene lined steel pipe with a pipe turning prompt function, comprising:

[0020] A polyethylene lined steel pipe with a pipe turning over prompting function is prepared according to the method for preparing a polyethylene lined steel pipe with a pipe turning over prompting function.

[0021] The beneficial effects of the present invention are that, compared with the prior art, the technical effects of the present invention include:

[0022] 1. It provides a polyethylene lined steel pipe turning reminder function based on the Hall effect, which solves the problem of uneven wear of the lining caused by untimely turning, more effectively prolongs the service life of the pipeline and reduces production costs.

[0023] 2. No connection between the Hall sensor element and the circular magnetic film reduces stress concentration points in the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a flow chart of a method for preparing a polyethylene lined steel pipe with a pipe turning prompting function. DETAILED DESCRIPTION

[0025] Polyethylene lined steel pipes have excellent properties such as high pressure resistance, corrosion resistance, low conveying resistance, and wear resistance, and are widely used in the mining industry. In order to extend the service life of the pipeline and reduce production costs, it is necessary to regularly flip the pipeline at a certain angle to make the wear degree of the pipeline lining in the circumferential direction similar. At present, regular flipping is generally adopted, which has the disadvantage of large differences in circumferential wear of the lining due to flipping too early or too late.

[0026] In view of the above problems, the present invention provides a polyethylene lined steel pipe with a pipe turning reminder function and a preparation method thereof, which solves the problem of uneven wear of the lining caused by untimely turning, more effectively extends the service life of the pipeline and reduces production costs.

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely express the technical solution of the present invention. The embodiments expressed in this application are only some embodiments of the present invention, not all embodiments. According to the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the protection scope of the present invention.

[0028] like Figure 1 As shown, the method for preparing a polyethylene lined steel pipe with a pipe turning prompting function according to the present invention comprises:

[0029] S01, first weighing polyethylene resin, taking the polyethylene resin as a base, adding 40-70% of magnetic powder filler by weight and stirring and mixing; calendering to prepare a magnetic film, and cutting the obtained circular magnetic film;

[0030] In a preferred but non-limiting embodiment of the present invention, the material of the magnetic powder filler is a mixture of one or more of manganese-zinc ferrite, neodymium-iron-boron, aluminum-iron-boron, iron-silicon, and iron-silicon-aluminum in equal amounts.

[0031] In a preferred but non-limiting embodiment of the present invention, the magnetic powder filler is made of high temperature resistant neodymium iron boron powder.

[0032] In a preferred but non-limiting embodiment of the present invention, the particle size of the magnetic powder filler is 3-10 μm.

[0033] In a preferred but non-limiting embodiment of the present invention, the stirring and mixing is performed for 2-5 minutes.

[0034] In a preferred but non-limiting embodiment of the present invention, the thickness of the magnetic film is 0.2-1 mm.

[0035] In a preferred but non-limiting embodiment of the present invention, the diameter of the circular magnetic film is 5-10 mm.

[0036] S02, placing the ultra-thin Hall sensor element at the bottom of the mold, and pouring a polyethylene cylinder with a diameter of 20-50 mm; after pouring, quickly placing the circular magnetic film directly above the Hall sensor element, and pressing it horizontally into the poured molten polyethylene to form a casting;

[0037] In a preferred but non-limiting embodiment of the present invention, the thickness of the Hall sensor element is 0.5-1 mm.

[0038] In a preferred but non-limiting embodiment of the present invention, the height of the entire casting after forming is 10-15 mm, the ultra-thin Hall sensor element is located at the bottom, and the circular magnetic film is located directly above the Hall sensor element.

[0039] S03, magnetizing the magnetic film in the sensor prepared in S02 in the thickness direction in a magnetizing machine, thus manufacturing a Hall sensor;

[0040] In a preferred but non-limiting embodiment of the present invention, the magnetization time is 1.5s, the magnetization current is 20KA, the magnetization voltage is DC2000V, and after the circular magnetic film is magnetized, a Hall voltage is generated in the Hall sensor that is powered on.

[0041] S04. Adhere 3 Hall sensors prepared in S03 to the pipe wall. The sensors are evenly distributed in the circumferential direction with an interval angle of 120°. All leg wires are led out from the flange. Then, a polyethylene lining is processed on the inner wall of the steel pipe by centrifugal method. After being stored at room temperature for 3 days, the polyethylene-based sensor can be buried.

[0042] A multi-channel micro-voltage monitoring device is installed at the flange to monitor the voltage generated at each sensor location in real time. When the circular magnetic film disappears due to wear, the Hall sensor no longer generates a micro-voltage signal, indicating that the polyethylene lining at a certain point has been worn to the preset thickness of the sensor. At this time, the corresponding line of the monitoring device issues an alarm, indicating that the pipe needs to be turned over.

[0043] The polyethylene lined steel pipe with a pipe turning prompting function described in the present invention comprises:

[0044] A polyethylene lined steel pipe with a pipe turning over prompting function is prepared according to the method for preparing a polyethylene lined steel pipe with a pipe turning over prompting function.

[0045] The beneficial effects of the present invention are that, compared with the prior art, the technical effects of the present invention include:

[0046] 1. It provides a polyethylene lined steel pipe turning reminder function based on the Hall effect, which solves the problem of uneven wear of the lining caused by untimely turning, more effectively prolongs the service life of the pipeline and reduces production costs.

[0047] 2. No connection between the Hall sensor element and the circular magnetic film reduces stress concentration points in the sensor.

[0048] The following are specific embodiments to further illustrate the present invention:

[0049] Embodiment 1:

[0050] The method for preparing a polyethylene lined steel pipe with a pipe turning prompt function comprises:

[0051] S01, first weighing polyethylene resin, taking the polyethylene resin as a base, adding 70% by weight of magnetic powder filler and stirring and mixing; calendering to prepare a magnetic film, and cutting the obtained circular magnetic film;

[0052] The material of magnetic powder filler is manganese-zinc ferrite.

[0053] The particle size of the magnetic powder filler is 10 μm.

[0054] The stirring and mixing time is 2 minutes.

[0055] The thickness of the magnetic film is 0.2 mm.

[0056] The diameter of the circular magnetic film is 10 mm.

[0057] S02, placing the ultra-thin Hall sensor element at the bottom of the mold, and pouring a polyethylene cylinder with a diameter of 20 mm; after pouring, quickly placing the circular magnetic film directly above the Hall sensor element, and pressing it horizontally into the poured molten polyethylene to form a casting;

[0058] The thickness of the Hall sensor element is 0.5 mm.

[0059] After forming, the height of the entire casting is 10 mm, the ultra-thin Hall sensor element is located at the bottom, and the circular magnetic film is located directly above the Hall sensor element.

[0060] S03, magnetizing the magnetic film in the sensor prepared in S02 in the thickness direction in a magnetizing machine, thus manufacturing a Hall sensor;

[0061] The magnetizing time is 1.5s, the magnetizing current is 20KA, and the magnetizing voltage is DC2000V. After the circular magnetic film is magnetized, a Hall voltage is generated in the powered Hall sensor.

[0062] S04. Adhere 3 Hall sensors prepared in S03 to the pipe wall. The sensors are evenly distributed in the circumferential direction with an interval angle of 120°. All leg wires are led out from the flange. Then, a polyethylene lining is processed on the inner wall of the steel pipe by centrifugal method. After being stored at room temperature for 3 days, the polyethylene-based sensor can be buried.

[0063] A multi-channel micro-voltage monitoring device is installed at the flange to monitor the voltage generated at each sensor location in real time. When the circular magnetic film disappears due to wear, the Hall sensor no longer generates a micro-voltage signal, indicating that the polyethylene lining at a certain point has been worn to the preset thickness of the sensor. At this time, the corresponding line of the monitoring device issues an alarm, indicating that the pipe needs to be turned over.

[0064] Polyethylene lined steel pipe with pipe turning prompt function, including:

[0065] A polyethylene lined steel pipe with a pipe turning over prompting function is prepared according to the method for preparing a polyethylene lined steel pipe with a pipe turning over prompting function described in this embodiment.

[0066] Embodiment 2:

[0067] The method for preparing a polyethylene lined steel pipe with a pipe turning prompt function comprises:

[0068] S01, first weighing polyethylene resin, taking the polyethylene resin as a base, adding 55% by weight of magnetic powder filler and stirring and mixing; calendering to prepare a magnetic film, and cutting the obtained circular magnetic film;

[0069] The magnetic powder filler is made of neodymium iron boron.

[0070] The particle size of the magnetic powder filler is 6 μm.

[0071] The stirring and mixing time is 3 minutes.

[0072] The thickness of the magnetic film is 0.6 mm.

[0073] The diameter of the circular magnetic film is 7 mm.

[0074] S02, placing the ultra-thin Hall sensor element at the bottom of the mold, and pouring a polyethylene cylinder with a diameter of 35 mm; after pouring, quickly placing the circular magnetic film directly above the Hall sensor element, and pressing it horizontally into the poured molten polyethylene to form a casting;

[0075] The thickness of the Hall sensor element is 0.7mm.

[0076] After forming, the height of the entire casting is 12 mm, the ultra-thin Hall sensor element is located at the bottom, and the circular magnetic film is located directly above the Hall sensor element.

[0077] S03, magnetizing the magnetic film in the sensor prepared in S02 in the thickness direction in a magnetizing machine, thus manufacturing a Hall sensor;

[0078] The magnetizing time is 1.5s, the magnetizing current is 20KA, and the magnetizing voltage is DC2000V. After the circular magnetic film is magnetized, a Hall voltage is generated in the powered Hall sensor.

[0079] S04. Adhere 3 Hall sensors prepared in S03 to the pipe wall. The sensors are evenly distributed in the circumferential direction with an interval angle of 120°. All leg wires are led out from the flange. Then, a polyethylene lining is processed on the inner wall of the steel pipe by centrifugal method. After being stored at room temperature for 3 days, the polyethylene-based sensor can be buried.

[0080] A multi-channel micro-voltage monitoring device is installed at the flange to monitor the voltage generated at each sensor location in real time. When the circular magnetic film disappears due to wear, the Hall sensor no longer generates a micro-voltage signal, indicating that the polyethylene lining at a certain point has been worn to the preset thickness of the sensor. At this time, the corresponding line of the monitoring device issues an alarm, indicating that the pipe needs to be turned over.

[0081] Polyethylene lined steel pipe with pipe turning prompt function, including:

[0082] A polyethylene lined steel pipe with a pipe turning over prompting function is prepared according to the method for preparing a polyethylene lined steel pipe with a pipe turning over prompting function described in this embodiment.

[0083] Embodiment 3:

[0084] The method for preparing a polyethylene lined steel pipe with a pipe turning prompt function comprises:

[0085] S01, first weighing polyethylene resin, taking the polyethylene resin as a base, adding 70% by weight of magnetic powder filler and stirring and mixing; calendering to prepare a magnetic film, and cutting the obtained circular magnetic film;

[0086] The material of magnetic powder filler is aluminum iron boron.

[0087] The particle size of the magnetic powder filler is 10 μm.

[0088] The stirring and mixing time is 5 minutes.

[0089] The thickness of the magnetic film is 1 mm.

[0090] The diameter of the circular magnetic film is 10 mm.

[0091] S02, placing the ultra-thin Hall sensor element at the bottom of the mold, and pouring a polyethylene cylinder with a diameter of 50 mm; after pouring, quickly placing the circular magnetic film directly above the Hall sensor element, and pressing it horizontally into the poured molten polyethylene to form a casting;

[0092] The thickness of the Hall sensor element is 1 mm.

[0093] After forming, the height of the entire casting is 15 mm, the ultra-thin Hall sensor element is located at the bottom, and the circular magnetic film is located directly above the Hall sensor element.

[0094] S03, magnetizing the magnetic film in the sensor prepared in S02 in the thickness direction in a magnetizing machine, thus manufacturing a Hall sensor;

[0095] The magnetizing time is 1.5s, the magnetizing current is 20KA, and the magnetizing voltage is DC2000V. After the circular magnetic film is magnetized, a Hall voltage is generated in the powered Hall sensor.

[0096] S04. Adhere 3 Hall sensors prepared in S03 to the pipe wall. The sensors are evenly distributed in the circumferential direction with an interval angle of 120°. All leg wires are led out from the flange. Then, a polyethylene lining is processed on the inner wall of the steel pipe by centrifugal method. After being stored at room temperature for 3 days, the polyethylene-based sensor can be buried.

[0097] A multi-channel micro-voltage monitoring device is installed at the flange to monitor the voltage generated at each sensor location in real time. When the circular magnetic film disappears due to wear, the Hall sensor no longer generates a micro-voltage signal, indicating that the polyethylene lining at a certain point has been worn to the preset thickness of the sensor. At this time, the corresponding line of the monitoring device issues an alarm, indicating that the pipe needs to be turned over.

[0098] Polyethylene lined steel pipe with pipe turning prompt function, including:

[0099] A polyethylene lined steel pipe with a pipe turning over prompting function is prepared according to the method for preparing a polyethylene lined steel pipe with a pipe turning over prompting function described in the embodiment of the present invention.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for preparing a polyethylene lined steel pipe with a pipe turning prompt function, characterized in that: include: S01, first weigh the polyethylene resin, take the polyethylene resin as the basis, add 40-70% of magnetic powder filler by weight and stir and mix; The magnetic film is prepared by calendering and the circular magnetic film is cut; S02, placing the Hall sensor element at the bottom of the mold and casting a polyethylene cylinder with a diameter of 20-50 mm; After the casting is completed, the circular magnetic film is placed directly above the Hall sensor element and pressed horizontally into the cast molten polyethylene to form a casting; S03, magnetizing the magnetic film in the sensor prepared in S02 in the thickness direction in a magnetizing machine, thus manufacturing a Hall sensor; S04. Adhere 3 Hall sensors prepared in S03 to the pipe wall. The sensors are evenly distributed in the circumferential direction with an interval angle of 120°. All leg wires are led out from the flange. Then, a polyethylene lining is processed on the inner wall of the steel pipe by centrifugal method. After being stored at room temperature for 3 days, the polyethylene-based sensor can be buried.

2. The method for preparing a polyethylene lined steel pipe with a pipe turning prompt function according to claim 1, characterized in that: The material of the magnetic powder filler is a mixture of one or more of manganese-zinc ferrite, neodymium-iron-boron, aluminum-iron-boron, iron-silicon, and iron-silicon-aluminum in equal amounts.

3. The method for preparing a polyethylene lined steel pipe with a pipe turning prompting function according to claim 2, characterized in that: The magnetic powder filler is made of neodymium iron boron powder.

4. The method for preparing a polyethylene lined steel pipe with a pipe turning prompt function according to claim 3, characterized in that: The particle size of the magnetic powder filler is 3-10 μm; The stirring and mixing time is 2-5 minutes.

5. The method for preparing a polyethylene lined steel pipe with a pipe turning prompt function according to claim 4, characterized in that: The thickness of the magnetic film is 0.2-1 mm.

6. The method for preparing a polyethylene lined steel pipe with a pipe turning over prompting function according to claim 5, characterized in that: The diameter of the circular magnetic film is 5-10 mm.

7. The method for preparing a polyethylene lined steel pipe with a pipe turning prompt function according to claim 6, characterized in that: The thickness of the Hall sensor element is 0.5-1mm.

8. The method for preparing a polyethylene lined steel pipe with a pipe turning prompting function according to claim 7, characterized in that: After forming, the height of the entire casting is 10-15 mm, the Hall sensor element is located at the bottom, and the circular magnetic film is located directly above the Hall sensor element.

9. The method for preparing a polyethylene lined steel pipe with a pipe turning over prompting function according to claim 8, characterized in that: The magnetizing time is 1.5s, the magnetizing current is 20KA, and the magnetizing voltage is DC2000V. After the circular magnetic film is magnetized, a Hall voltage is generated in the powered Hall sensor.

10. A polyethylene lined steel pipe with a pipe turning prompt function, characterized in that: include: A polyethylene lined steel pipe with a pipe turning over prompting function prepared by the method for preparing a polyethylene lined steel pipe with a pipe turning over prompting function according to any one of claims 1 to 9.

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