Double-station multifunctional internal anticorrosive coating detection device and use method thereof

Abstract

The invention relates to a double-station multifunctional inner anticorrosive coating detection device and a use method thereof, two steel pipe detection stations are arranged to work simultaneously, the quality of a coating on the inner wall of a steel pipe is detected through a leakage point probe, a drift diameter gauge and a coating thickness probe of a detection gun barrel, and obtained data are processed and displayed on a PLC display control operation table. Detection types are switched through the induction limit switch and displayed through the corresponding lamps. The detection gun barrel is in a spiral state, and the occupied area of the device is reduced. The drift diameter gauge and the probe on the gun barrel can be adjusted according to the model of the steel pipe to be detected, and the position of the steel pipe can be accurately positioned so as to find the corresponding initial position. Compared with the prior art, the device has the advantages of high efficiency, wide application range, small occupied area and the like.

Description

Technical Field

[0001] The invention relates to the field of coating quality detection, and in particular to a double-station multifunctional internal anti-corrosion coating detection device and a use method thereof. Background Art

[0002] In the production process of steel pipes, it is often necessary to treat the inner wall of the steel pipe with an anti-corrosion coating. Especially in the field of petroleum industry, great attention is paid to the quality of the internal anti-corrosion coating treatment of steel pipes, such as thickness, leakage points and diameter. Therefore, in the internal anti-corrosion coating treatment of steel pipes, it is necessary to test the quality of the internal anti-corrosion coating to prevent the coating thickness from exceeding the tolerance, resulting in tool jamming and uneven coating inside the pipe, and to ensure the quality of the internal anti-corrosion coating products.

[0003] At present, when conducting internal anti-corrosion layer inspection, the method of manually inspecting the thickness of the internal anti-corrosion layer first, then conducting diameter inspection, and then conducting leakage point inspection in the next process is adopted. There are many processes and the efficiency is low. In addition, due to the complicated processes, relevant equipment is required, so the equipment of the entire inspection process is long and occupies a large area. Therefore, how to simplify the internal coating inspection process of pipes, streamline the inspection equipment and improve the inspection efficiency is a technical problem that needs to be solved. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a dual-station multifunctional internal anti-corrosion coating detection device and its use method. By simultaneously measuring the thickness, leakage point and diameter, the detection process is simplified. The barrel operation and processing and display of the detection results are controlled by the PLC display control console, and the dual-station simultaneous detection is performed, which further improves the efficiency.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] According to one aspect of the present invention, a double-station multifunctional internal anti-corrosion coating detection device is provided, including a steel pipe conveying stand, an equipment bracket, a barrel conveying module, a detection barrel rotation module, a detection barrel and a PLC display control console.

[0007] Among them, there are a steel pipe conveying stand, an equipment bracket, a barrel conveying module, a detection barrel rotation module, a detection barrel and a PLC display control console; wherein the steel pipe to be tested is placed on the steel pipe conveying stand 1; the barrel conveying module is arranged on the equipment bracket, and the conveyance of the detection barrel is realized by motor drive and inductive limit control; the detection barrel rotation module cooperates with the barrel conveying module to make the detection barrel stretch and hover inside the steel pipe; the PLC display control console is respectively connected to the detection barrel rotation module, the barrel conveying module and the steel pipe conveying stand to control the start and stop of the device and the entry of detection data.

[0008] Furthermore, the steel pipe conveying stand includes a first stand, a second stand and a third stand; two V-shaped frames are arranged in parallel on the stands; the V-shaped frames include an insulating plate and a conductive copper plate; the conductive copper plate is connected to the leakage point counter of the PLC display control console through a leakage point detection line.

[0009] Furthermore, the barrel conveying module includes a motor transmission unit and an inductive limit switch control unit; the motor transmission unit includes a speed regulating motor, a rotating gear and a clamping roller, a clamping roller is provided above the rotating gear, and the clamping roller is connected to the cylinder telescopic rod; the inductive limit switch control unit 32 is installed and connected to the shaft of the motor transmission unit through a bevel gear.

[0010] The inductive limit switch control unit includes a bevel gear, a rotating screw, a bearing bracket, a fixed plate, a first inductive limit switch, a second inductive limit switch, a third inductive limit switch, a fourth inductive limit switch and a fifth inductive limit switch; wherein the bevel gear is connected to the output shaft of the motor transmission unit and the rotating screw; the rotating screw is fixed on the bearing bracket; a fixed plate is installed on the bearing bracket, and the inductive limit switches are sequentially installed on the fixed plate, and the inductive limit switches are connected to the motor controller of the PLC display control console.

[0011] Furthermore, the detection barrel rotation module is installed side by side at the rear end of the equipment bracket, and the detection barrel is controlled to automatically rotate through the conductive slip ring at the central axis of the detection barrel rotation module 4.

[0012] Furthermore, the detection gun barrel is a fiberglass threading tube, which includes a leakage detection line and four coating thickness detection lines; a leakage probe is installed at the front end of the detection gun barrel to check the leakage of the coating; the rear of the leakage probe is connected to a diameter gauge to detect whether the coating is out of tolerance; four coating thickness probes are arranged at the rear of the diameter gauge to detect the coating thickness.

[0013] Furthermore, the PLC display control console includes a leakage counter, a motor controller and a coating thickness display; the leakage counter is connected in series between the leakage probe and the steel pipe conveying stand through a detection circuit to form a conductive detection loop; the motor controller is connected to the first inductive limit switch and the fifth inductive limit switch through a circuit, and controls the start and stop of the motor through the limit switch; the coating thickness display is connected to the coating thickness detection probe, the second inductive limit switch, the third inductive limit switch and the fourth inductive limit switch through a detection circuit to record and display the coating thickness.

[0014] Furthermore, the front end joint of the detection gun barrel is connected to an aluminum alloy clamping frame for clamping the conductive rubber plate, and the rear side of the clamping frame is connected to a diameter gauge; the rear end joint of the detection gun barrel is connected to a conductive slip ring circuit, one side of the conductive slip ring circuit is connected to a leakage point probe and a coating thickness probe of the detection gun barrel, and the other side is connected to a leakage point counter and a coating thickness display.

[0015] Furthermore, the coating thickness detection probe is an ultrasonic thickness gauge, which is installed in the hole groove of the diameter gauge in a rectangular vertex shape and is connected to the coating thickness display.

[0016] According to another aspect of the present invention, a method for using a dual-station multifunctional internal anti-corrosion coating detection device is provided, the method comprising the following steps:

[0017] S1. According to the steel pipe to be tested placed on the conductive V-shaped copper plate, select the matching leakage point probe and diameter gauge;

[0018] S2. After the selection is completed, the barrel conveying module is started, the leak point probe moves to the starting position, and the first induction limit switch is closed, and the corresponding induction light is turned on;

[0019] S3, the detection gun barrel enters the steel pipe body, and the motor transmission unit drives the detection gun barrel forward;

[0020] S4: When the second inductive limit switch is closed and the corresponding inductive light is on, the coating thickness at 50 cm inward from the pipe inlet is detected; when the third inductive limit switch is closed and the corresponding inductive light is on, the coating thickness at the middle part of the pipe body is detected; when the fourth inductive limit switch is closed and the corresponding inductive light is on, the coating thickness at 50 cm inward from the pipe outlet is detected;

[0021] S5. When the fifth induction limit switch is closed and the corresponding induction light is on, the motor transmission unit drives the detection barrel to start retreating.

[0022] S6. When the detection gun barrel moves back, the leakage detection is started. The detection gun barrel automatically rotates back to the disc. If there is a leakage, the leakage probe is connected to the steel pipe conveying platform, and the leakage counter counts.

[0023] S7. When the induction light corresponding to the first induction limit switch lights up again, the motor drive unit and the detection barrel rotation module stop, the leakage point probe returns to the starting position, and the detection ends.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) Improve detection efficiency: Through the dual-station design, the thickness of the coating inside the pipe, the leakage point and the measured thickness can be detected at the same time, and the detection results can be recorded, analyzed and displayed, which simplifies the work process. While ensuring the detection quality, it improves the quality detection efficiency of the anti-corrosion coating inside the pipe.

[0026] (2) Wide range of applications: The inner wall of the steel pipe can be accurately located through the barrel conveying module, and the corresponding leakage point probe and diameter gauge can be selected according to the steel pipe to be tested, which is suitable for different types of steel pipes.

[0027] (3) Small footprint: By concentrating multiple different functions on the same device and placing the detection barrel in a spiral, the footprint of the device required for the detection process is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is the main structural diagram of the dual-station multifunctional internal anti-corrosion coating detection device;

[0029] Figure 2 This is a top view of the structure of a dual-station multifunctional internal anti-corrosion coating detection device;

[0030] Figure 3 This is the main structural view of the V-shaped frame of the double-station multifunctional internal anti-corrosion coating detection device;

[0031] Figure 4 This is the main structural diagram of the barrel conveying mechanism of the double-station multifunctional internal anti-corrosion coating detection device;

[0032] Figure 5 It is a top view of the barrel conveying mechanism of the double-station multifunctional internal anti-corrosion coating detection device;

[0033] Figure 6 It is a side view of the barrel conveying mechanism of the double-station multifunctional internal anti-corrosion coating detection device;

[0034] Figure 7 This is the main structural diagram of the inspection barrel of the double-station multifunctional internal anti-corrosion coating inspection device.

[0035] Explanation of the numbers in the figure: 1. Steel pipe conveying stand; 11. First stand; 12. Second stand; 13. Third stand; 14. V-shaped stand; 141. Insulation plate; 142. Conductive copper plate; 143. Leakage detection line; 2. Equipment bracket; 3. Gun barrel conveying module; 31. Motor transmission unit; 32. Inductive limit switch control unit; 311. Speed ​​regulating motor; 312. Rotating gear; 313. Pressing roller; 314. Cylinder; 321. Bevel gear; 322. Rotating screw; 323. Bearing bracket; 324. Fixed plate; 325. First inductive limit switch; 326. Second inductive limit switch; 327. Third inductive limit switch; 328. Fourth inductive limit switch; 329. Fifth inductive limit switch; 4. Detection barrel rotation module; 41. Conductive slip ring; 5. Detection barrel; 51. Detection circuit; 52. Leakage probe; 53. Drift gauge; 54. Coating thickness probe; 6. PLC display control console; 61. Leakage counter; 62. Motor controller; 63. Coating thickness display. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0037] like Figure 1 As shown, it is a front view of a dual-station multifunctional internal anti-corrosion coating detection device, which includes: a steel pipe conveying stand 1, an equipment bracket 2, a barrel conveying module 3, a detection barrel rotation module 4, a detection barrel 5 and a PLC display control console 6. Among them, the steel pipe conveying stand 1, the equipment bracket 2, the barrel conveying module 3, the detection barrel rotation module 4, the detection barrel 5 and the PLC display control console 6; wherein, the steel pipe to be detected is placed on the steel pipe conveying stand 1; the barrel conveying module 3 is arranged on the equipment bracket 2, and the transportation of the detection barrel 5 is realized by motor transmission and inductive limit control; the detection barrel rotation module 4 cooperates with the barrel conveying module 3 to make the detection barrel 5 stretch and hover inside the steel pipe; the PLC display control console 6 is respectively connected to the detection barrel rotation module 4, the barrel conveying module 3 and the steel pipe conveying stand 1, and controls the start and stop of the device and the entry of detection data. The top view of the device is shown in Figure 2 shown.

[0038] like Figure 3As shown, the steel pipe conveying stand 1 includes a first stand 11, a second stand 12 and a third stand 13; two V-shaped frames 14 are arranged in parallel on the stands; the V-shaped frames 14 include an insulating plate 141 and a conductive copper plate 142; the conductive copper plate 142 is connected to the leakage point counter 61 of the PLC display control console 6 through a leakage point detection line 143.

[0039] The barrel conveying module 3 includes a motor transmission unit 31 and an inductive limit switch control unit 32; the motor transmission unit 31 includes a speed regulating motor 311, a rotating gear 312 and a clamping roller 313, a clamping roller 313 is provided above the rotating gear 312, and the clamping roller 313 is connected to the telescopic rod of the cylinder 314; the inductive limit switch control unit 32 is installed and connected to the shaft of the motor transmission unit 31 through a bevel gear 321. The inductive limit switch control unit 32 includes a bevel gear 321, a rotating screw 322, a bearing bracket 323, a fixed plate 324, a first inductive limit switch 325, a second inductive limit switch 326, a third inductive limit switch 327, a fourth inductive limit switch 328 and a fifth inductive limit switch 329; wherein the bevel gear 321 is connected to the output shaft of the motor transmission unit 31 and the rotating screw 322; the rotating screw 322 is fixed on the bearing bracket 323; a fixed plate 324 is installed on the bearing bracket, and the inductive limit switch is sequentially installed on the fixed plate 324, and the inductive limit switch is connected to the motor controller 62 of the PLC display control console 6. The front view of the barrel conveying module 3 is shown in FIG. Figure 4 As shown, the top view is Figure 5 As shown, the side view is Figure 6 shown.

[0040] The detection barrel rotation module 4 is installed side by side at the rear end of the equipment bracket 2, and the detection barrel 5 is controlled to automatically rotate through the conductive slip ring 41 at the central axis of the detection barrel rotation module 4.

[0041] like Figure 7 As shown, the detection gun barrel 5 is a glass fiber reinforced plastic threading tube, which includes a leakage point detection line and four coating thickness detection lines; a leakage point probe 52 is installed at the front end of the detection gun barrel 5 to check the coating leakage point; the rear of the leakage point probe 52 is connected to a diameter gauge 53 to detect whether the coating is out of tolerance; four coating thickness probes 54 are arranged at the rear of the diameter gauge 53 to detect the coating thickness. The front end joint of the detection gun barrel 5 is connected to an aluminum alloy clamping frame for clamping the conductive rubber plate, and the rear side of the clamping frame is connected to the diameter gauge 53; the rear end joint of the detection gun barrel 5 is connected to the conductive slip ring 41 line, and one side of the conductive slip ring 41 line is connected to the leakage point probe 52 and the coating thickness probe 54 of the detection gun barrel 5, and the other side is connected to the leakage point counter 61 and the coating thickness display 63. The coating thickness detection probe 54 is an ultrasonic thickness gauge, which is installed in the hole groove of the diameter gauge 53 in a rectangular vertex shape and connected to the coating thickness display 63.

[0042] The PLC display control console 6 includes a leakage point counter 61, a motor controller 62 and a coating thickness display 63; the leakage point counter 61 is connected in series between the leakage point probe 52 and the steel pipe conveying stand 1 through the detection line 51 to form a conductive detection loop; the motor controller 62 is connected to the first inductive limit switch 325 and the fifth inductive limit switch 329 through the line, and controls the start and stop of the motor through the limit switch; the coating thickness display 63 is connected to the coating thickness detection probe 54, the second inductive limit switch 326, the third inductive limit switch 327 and the fourth inductive limit switch 328 through the detection line 51 to record and display the coating thickness.

[0043] The method for using the device in this embodiment includes the following steps:

[0044] S1, placing the inner coated steel pipe to be tested on the steel pipe conveying stand 1, rolling the steel pipe onto the conductive V-shaped copper plate 14, and judging and selecting the matching leakage point probe 52 and the drift gauge 53 according to the steel pipe to be tested placed on the conductive V-shaped copper plate;

[0045] S2, after the selection is completed, the barrel delivery module 3 is started, the leak point probe 52 is moved to the starting position, and at the same time the first induction limit switch 325 is closed, and the corresponding induction lamp is lit;

[0046] S3, the detection gun barrel 4 enters the steel pipe body, and the motor transmission unit 31 drives the detection gun barrel 5 forward;

[0047] S4, when the second inductive limit switch 326 is closed and the corresponding inductive light is on, the coating thickness at 50 cm inward from the pipe inlet is detected; when the third inductive limit switch 327 is closed and the corresponding inductive light is on, the coating thickness at the middle part of the pipe body is detected; when the fourth inductive limit switch 328 is closed and the corresponding inductive light is on, the coating thickness at 50 cm inward from the pipe outlet is detected, and the detection data is transmitted to the PLC display control console 6;

[0048] S5. When the fifth induction limit switch 329 is closed and the corresponding induction lamp is lit, the motor transmission unit 31 drives the detection barrel 5 to start retreating.

[0049] S6, the detection gun barrel 5 retreats and starts the leakage detection, the detection gun barrel 5 automatically rotates back to the disk, if there is a leakage, the leakage probe 52 is connected to the steel pipe conveying platform 1, and the leakage counter 61 counts;

[0050] S7. When the induction lamp corresponding to the first induction limit switch 325 lights up again, the motor transmission unit 31 and the detection barrel rotating module 4 stop, and the leakage point probe 52 returns to the starting position, and the detection ends.

[0051] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A dual-station multifunctional internal anti-corrosion coating detection device, characterized in that: It comprises a steel pipe conveying stand (1), an equipment support (2), a gun barrel conveying module (3), a detection gun barrel rotation module (4), a detection gun barrel (5) and a PLC display control operation table (6); Wherein, the steel pipe to be tested is placed on the steel pipe conveying stand (1); The gun barrel conveying module (3) is arranged on the equipment support (2) and realizes the conveying of the detection gun barrel (5) through motor transmission and inductive limit control; The detection gun barrel rotating module (4) cooperates with the gun barrel conveying module (3) to make the detection gun barrel (5) stretch and spiral inside the steel pipe; The PLC display control console (6) is respectively connected to the detection barrel rotation module (4), the barrel conveying module (3), and the steel pipe conveying stand (1) to control the start and stop of the device and the input of detection data.

2. A dual-station multifunctional internal anti-corrosion coating detection device according to claim 1, characterized in that: The steel pipe conveying stand (1) comprises a first stand (11), a second stand (12) and a third stand (13); two V-shaped frames (14) are arranged in parallel on each of the stands; the V-shaped frames (14) comprise an insulating plate (141) and a conductive copper plate (142); the conductive copper plate (142) is connected to a leakage point counter (61) of a PLC display control console (6) via a leakage point detection line (143).

3. A dual-station multifunctional internal anti-corrosion coating detection device according to claim 1, characterized in that: The gun barrel conveying module (3) comprises a motor transmission unit (31) and an inductive limit switch control unit (32); the motor transmission unit (31) comprises a speed regulating motor (311), a rotating gear (312) and a clamping roller (313); a clamping roller (313) is provided above the rotating gear (312), and the clamping roller (313) is connected to the telescopic rod of the cylinder (314); the inductive limit switch control unit (32) is installed and connected to the shaft of the motor transmission unit (31) through a bevel gear (321).

4. A dual-station multifunctional internal anti-corrosion coating detection device according to claim 3, characterized in that: The inductive limit switch control unit (32) comprises a bevel gear (321), a rotating screw (322), a bearing bracket (323), a fixed plate (324), a first inductive limit switch (325), a second inductive limit switch (326), a third inductive limit switch (327), a fourth inductive limit switch (328) and a fifth inductive limit switch (329); wherein the bevel gear (321) is connected to the output shaft of the motor transmission unit (31) and the rotating screw (322); the rotating screw (322) is fixed on the bearing bracket (323); a fixed plate (324) is installed on the bearing bracket, the inductive limit switches are sequentially installed on the fixed plate (324), and the inductive limit switches are connected to the motor controller (62) of the PLC display control console (6).

5. The dual-station multifunctional internal anti-corrosion coating detection device according to claim 1 is characterized in that: The detection gun barrel rotation module (4) is installed side by side at the rear end of the equipment bracket (2), and the detection gun barrel (5) is controlled to automatically rotate through the conductive slip ring (41) at the central axis of the detection gun barrel rotation module (4).

6. A dual-station multifunctional internal anti-corrosion coating detection device according to claim 1, characterized in that: The detection gun barrel (5) is a glass fiber reinforced plastic threading tube, and includes a leakage point detection line and four coating thickness detection lines in the tube; a leakage point probe (52) is installed at the front end of the detection gun barrel (5) for checking the leakage point of the coating; the rear part of the leakage point probe (52) is connected to a diameter gauge (53) for detecting whether the coating is out of tolerance; and four coating thickness probes (54) are arranged at the rear part of the diameter gauge (53) for detecting the coating thickness.

7. The dual-station multifunctional internal anti-corrosion coating detection device according to claim 1 is characterized in that: The PLC display control console (6) comprises a leakage point counter (61), a motor controller (62) and a coating thickness display instrument (63); the leakage point counter (61) is connected in series between the leakage point probe (52) and the steel pipe conveying stand (1) through a detection circuit (51) to form a conductive detection loop; the motor controller (62) is connected to the first inductive limit switch (325) and the fifth inductive limit switch (329) through a circuit, and controls the start and stop of the motor through the limit switch; the coating thickness display instrument (63) is connected to the coating thickness detection probe (54), the second inductive limit switch 326, the third inductive limit switch 327 and the fourth inductive limit switch 328 through the detection circuit (51) to record and display the coating thickness.

8. The dual-station multifunctional internal anti-corrosion coating detection device according to claim 1 is characterized in that: The front end joint of the detection gun barrel (5) is connected to an aluminum alloy clamping frame for clamping the conductive rubber plate, and the rear side of the clamping frame is connected to a diameter gauge (53); the rear end joint of the detection gun barrel (5) is connected to a conductive slip ring (41) circuit, one side of the conductive slip ring (41) circuit is connected to a leakage point probe (52) and a coating thickness probe (54) of the detection gun barrel (5), and the other side is connected to a leakage point counter (61) and a coating thickness display instrument (63).

9. The dual-station multifunctional internal anti-corrosion coating detection device according to claim 1 is characterized in that: The coating thickness detection probe (54) is an ultrasonic thickness gauge, which is installed in the hole groove of the diameter gauge (53) in a rectangular apex shape and is connected to the coating thickness display (63).

10. A method for using a dual-station multifunctional internal anti-corrosion coating detection device, suitable for the device as described in any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1. According to the steel pipe to be tested placed on the conductive V-shaped copper plate, a matching leak point probe (52) and a drift gauge (53) are selected; S2, after the selection is completed, the barrel delivery module (3) is started, the leak point probe (52) is moved to the starting position, and at the same time the first inductive limit switch (325) is closed, and the corresponding inductive lamp is lit; S3, the detection gun barrel (4) enters the steel tube body, and the motor transmission unit (31) drives the detection gun barrel (5) forward; S4, when the second inductive limit switch (326) is closed and the corresponding inductive light is on, the coating thickness at 50 cm inward from the pipe inlet is detected; when the third inductive limit switch (327) is closed and the corresponding inductive light is on, the coating thickness at the middle part of the pipe body is detected; when the fourth inductive limit switch (328) is closed and the corresponding inductive light is on, the coating thickness at 50 cm inward from the pipe outlet is detected; S5. When the fifth inductive limit switch (329) is closed and the corresponding inductive lamp is lit, the motor transmission unit (31) drives the detection gun barrel (5) to start retreating. S6, while the detection gun barrel (5) moves backward, the leakage detection is started, and the detection gun barrel (5) automatically rotates back to the disk. If there is a leakage, the leakage probe (52) is connected to the steel pipe conveying platform (1), and the leakage counter (61) counts; S7. When the induction lamp corresponding to the first induction limit switch (325) lights up again, the motor transmission unit (31) and the detection barrel rotation module (4) stop, the leakage point probe (52) returns to the starting position, and the detection ends.

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