Non-disassembly heat preservation pulsed eddy current testing auxiliary tool for small-diameter pipe

Abstract

The invention belongs to the technical field of pulsed eddy current detection, and particularly relates to an auxiliary tool for non-disassembly heat preservation detection of a small-diameter tube, in particular to an auxiliary tool for non-disassembly heat preservation detection of a small-diameter tube. The invention discloses a non-disassembly heat-preservation pulsed eddy current detection auxiliary tool for a through small-diameter tube. The tool comprises a sensor, a sensor fixing piece and an arc-shaped bottom support, the sensor is arranged in the sensor fixing piece in a penetrating manner; the sensor fixing piece is detachably connected with the arc-shaped bottom support; the lower surface of the arc-shaped bottom support is arc-shaped and used for being attached to the outer surface of a small-diameter pipe. Through mutual cooperation of the structures, abnormal signals generated by operation of detection personnel or a severe environment are reduced, and the detection efficiency and accuracy are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of pulsed eddy current testing, and particularly relates to an auxiliary tool for non-destructive testing of small-diameter pipes without removing thermal insulation. Background Art

[0002] The general detection method of pulsed eddy current testing is to remove the thermal insulation layer and then use conventional non-destructive testing methods such as ultrasonic testing to detect the pipeline. After the detection is completed, the thermal insulation layer is reinstalled. Therefore, this type of method has a large amount of work, low detection efficiency, and high cost. In addition, it is very difficult to restore the original appearance of the removed thermal insulation layer during reinstallation, and it is easy to have unreasonable lap joints, loose seals, air pockets, and looseness of the thermal insulation layer, resulting in new corrosion hazard points under the thermal insulation layer. Currently, methods that do not require removing the thermal insulation layer for in-service detection of pipeline corrosion include radiographic testing, neutron backscattering testing, and pulsed eddy current testing. Among these, pulsed eddy current technology for non-destructive testing without removing the thermal insulation layer can detect the pipeline under the thermal insulation layer by increasing the intensity of transmission and reception, effectively avoiding the removal of the thermal insulation layer. The maturity of the pulsed eddy current non-destructive testing technology without removing the thermal insulation layer will save a large amount of expenditure for petrochemical enterprises every year.

[0003] The research on the pulsed eddy current testing technology for small-diameter pipes without removing the thermal insulation layer is based on the pulsed eddy current technology, and compensates for the attenuation of the signal caused by the thickness of the thermal insulation layer by enhancing the received and transmitted signals. Currently, the bottom surface of the detection sensor used for non-destructive testing of small-diameter pipes without removing the thermal insulation layer is flat, while the surface of the small-diameter pipe is curved. During detection, it is necessary to manually surround the sensor around the small-diameter pipe for one week, and the flat surface of the sensor does not fit the curved surface of the small-diameter pipe, resulting in interference signals often generated due to the jitter caused by manual operation during testing. In addition, the surface of the pipeline mostly has rough conditions such as pitting corrosion, soldering, and weld seams. During detection, a slight fluctuation will generate an abnormal signal. The detection engineer analyzes and judges the detected pipeline based on the abnormal fluctuation. The abnormal signals caused by the detection environment or personnel operation are very likely to interfere with the analysis, ultimately resulting in the engineer constantly checking and repairing to eliminate the interference, thereby reducing the work efficiency and even causing misjudgment by technicians and resulting in detection quality accidents.

[0004] In summary, there is an urgent need to invent an auxiliary tool that can stably detect small-diameter pipes under manual operation to solve the above-mentioned problems. Summary of the Invention

[0005] The present invention provides an auxiliary tool for pulsed eddy current testing of small-diameter pipes without removing the thermal insulation layer in order to solve the above-mentioned problems. An auxiliary tool for pulsed eddy current testing of small-diameter pipes without removing the thermal insulation layer includes a sensor, a sensor fixing member, and an arc-shaped bottom bracket. The sensor is inserted through the sensor fixing member; the sensor fixing member is detachably connected to the arc-shaped bottom bracket; the lower surface of the arc-shaped bottom bracket is arc-shaped and is used to fit the outer surface of the small-diameter pipe.

[0006] In a feasible embodiment, the sensor fixing member includes a hub protection housing, a left hub clamp, and a right hub clamp; the hub protection housing is disposed on the upper surface of the arc-shaped base. The left hub clamp and the right hub clamp are disposed in the hub protection housing; when the left hub clamp and the right hub clamp are connected, a first receiving cavity is formed for clamping the sensor.

[0007] In a feasible embodiment, a left arc-shaped groove is provided on the inner side of the left hub clamp; a right arc-shaped groove is provided on the inner side of the right hub clamp; the left arc-shaped groove, the first receiving cavity, and the right arc-shaped groove are connected in sequence.

[0008] In a feasible embodiment, the hub protection housing is provided with a left hub slider and a right hub slider; the left hub clamp is provided with a left clamp slide rail; the right hub clamp is provided with a right clamp slide rail; the left hub slider is slidably disposed in the left clamp slide rail; the right hub slider is slidably disposed in the right clamp slide rail.

[0009] In a feasible embodiment, a left base slider and a right base slider are provided on the outer side of the hub protection housing; left base slide rails, right base slide rails, and base limit blocks are provided on the upper surface of the arc-shaped base; the left base slider is slidably disposed in the left base slide rail; the right base slider is slidably disposed in the right base slide rail; the base limit blocks are used for limiting the hub protection housing.

[0010] In a feasible embodiment, the sensor is provided with a hollow channel; a ferrite column is provided in the hollow channel; the ferrite column penetrates through the hollow channel for strengthening the signal reception of the sensor.

[0011] In a feasible embodiment, a fixing shell is further included; the fixing shell fixes the ferrite column in the hollow channel; the fixing shell further includes a left fixing shell and a right fixing shell; the left fixing shell is connected to the right fixing shell; the left fixing shell is provided with a left protection shell and a left fixing member; the right fixing shell is provided with a right protection shell and a right fixing member; when the left protection shell and the right protection shell are connected, a ferrite column receiving groove is formed; the ferrite column is disposed in the ferrite column receiving groove; when the left fixing member and the right fixing member are connected, a fixing member is formed; one end of the fixing member is provided with a second arc-shaped groove; the second arc-shaped groove is connected to the left fixing shell and the right fixing shell.

[0012] In a feasible embodiment, a U-shaped opening is formed in the upper part of the hub protection housing; a first arc-shaped groove is provided at the end of the U-shaped opening; the first arc-shaped groove, the ferrite column receiving groove, and the second arc-shaped groove are connected in sequence;

[0013] In a feasible embodiment, left fixing member slide rails and right fixing member slide rails are provided on both sides of the U-shaped opening; left fixing member sliders and right fixing member sliders are provided on both sides of the fixing shell; the left fixing member slider is slidably disposed in the left fixing member slide rail; the right fixing member slider is slidably disposed in the right fixing member slide rail.

[0014] In a feasible embodiment, a left limiting block is provided on the upper part of the left hub clamp; a right limiting block is provided on the upper part of the right hub clamp; the end of the left limiting block is connected to the end of the right limiting block to form a limiting block; the limiting block is connected to the fixing member and the side port of the U-shaped opening and is used to abut against the fixing shell.

[0015] Beneficial effects

[0016] In the present invention, the sensor is arranged in the sensor fixing member, and then the sensor fixing member is arranged on the arc top bottom support to construct an auxiliary tool for the sensor, reducing abnormal signals caused by the operation of the detection personnel or harsh environments, and improving the detection efficiency and accuracy. Description of the drawings

[0017] Figure 1 It is an exploded structural schematic diagram of the overall structure of the auxiliary tool for non-disassembling the insulation of small-diameter pipes by pulsed eddy current detection according to the present invention.

[0018] Figure 2 It is an assembled structural schematic diagram of the overall structure of the auxiliary tool for non-disassembling the insulation of small-diameter pipes by pulsed eddy current detection according to the present invention.

[0019] Figure 3 It is a schematic diagram of the overall structure of the auxiliary tool for non-disassembling the insulation of small-diameter pipes by pulsed eddy current detection according to the present invention.

[0020] Figure 4 It is an assembled structural schematic diagram of the left hub clamp and the right hub clamp.

[0021] Figure 5 It is a schematic diagram of the structure of the right hub clamp Figure 1 .

[0022] Figure 6 It is a schematic diagram of the structure of the right hub clamp Figure 2 .

[0023] Figure 7 It is a schematic diagram of the structure of the left hub clamp Figure 1 .

[0024] Figure 8 It is a schematic diagram of the structure of the left hub clamp Figure 2 .

[0025] Figure 9 It is a schematic diagram of the structure of the hub protection shell.

[0026] Figure 10 It is a schematic diagram of the structure of the arc bottom support.

[0027] Figure 11 It is a schematic diagram of the structure of the sensor.

[0028] Figure 12Schematic diagram of the assembly structure of the ferrite column and the fixed shell.

[0029] Figure 13 Schematic diagram of the structure of the right fixed shell.

[0030] Figure 14 Schematic diagram of the structure of the left fixed shell.

[0031] Figure 15 Schematic diagram of the structure of the fixed shell.

[0032] Figure 16 Schematic diagram of the assembly of the fixed shell and the sensor

[0033] Figure 17 Position relationship diagram of the auxiliary tooling and the small-diameter pipe during use.

[0034] Reference numerals

[0035] Sensor 1;

[0036] Hollow channel 11;

[0037] Sensor fixing member 2;

[0038] Hub protection housing 21, hub left slider 211, hub right slider 212, U-shaped opening 213, first arc-shaped groove 214, left fixing member slide rail 215, right fixing member slide rail 216;

[0039] Hub left clamp 22, left arc-shaped groove 221, left clamp slide rail 222;

[0040] Hub right clamp 23, right arc-shaped groove 231, right clamp slide rail 232;

[0041] First accommodation cavity 24;

[0042] Base left slider 25, base right slider 26;

[0043] Arc-shaped base 3, base left slide rail 31, base right slide rail 32, base limit block 33;

[0044] Limit block 4, left limit block 41, right limit block 42;

[0045] Fixed shell 5, left fixed shell 51, left protective shell 511, left fixing member 512, right fixed shell 52, right protective shell 521, right fixing member 522, ferrite column receiving groove 53, fixing member 54, second arc-shaped groove 541, left fixing member slider 55, right fixing member slider 56;

[0046] Ferrite column 6; Detailed implementation manners

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] Embodiment 1

[0049] As Figure 1 shown in or 2, an auxiliary tool for pulsed eddy current detection of small-diameter pipes without removing thermal insulation includes a sensor 1, a sensor fixing member 2, and an arc-shaped bottom support 3; the sensor 1 is inserted through the sensor fixing member 2; the sensor fixing member 2 is connected to the arc-shaped bottom support 3; the lower surface of the arc-shaped bottom support 3 is arc-shaped and is used to fit the outer surface of the small-diameter pipe.

[0050] It should be noted that the sensor fixing member 2 is slidably fixed on the upper surface of the arc-shaped bottom support 3. The sensor fixing member 2 wraps the sensor 1 therein, and at the same time, the working end of the sensor 1 is in contact with the upper surface of the arc-shaped bottom support 3. The radian of the lower surface of the arc-shaped bottom support 3 can just fit the small-diameter pipe, so that the lower surface of the arc-shaped bottom support 3 can be tightly attached to the outside of the small-diameter pipe for rotational detection, reducing abnormal signals generated by manual operation. At the same time, according to the outer diameters of different small-diameter pipes, arc-shaped bottom supports 3 with different lower surface radiances are selected to make the small-diameter pipes better fit the arc-shaped bottom support 3. When detecting, the radian of the arc-shaped bottom support 3 can just fit the small-diameter pipe. In actual detection, the sensor will stably scan around the pipe for one week, which can greatly reduce the probability of errors.

[0051] As Figures 3 - 8 shown, the sensor fixing member 2 includes a hub protection housing 21, a hub left clamp 22, and a hub right clamp 23. The hub protection housing 21 is arranged on the upper surface of the arc-shaped bottom support 3. The hub left clamp 22 and the hub right clamp 23 can be assembled with each other and detachably arranged in the hub protection housing 21. After the hub left clamp 22 and the hub right clamp 23 are assembled, as Figure 4 shown, a first accommodation cavity 24 is formed in the middle part, and the sensor 1 is inserted into the first accommodation cavity 24 for fixation.

[0052] In a specific embodiment, as Figure 7 , 8 shown, a left arc-shaped groove 221 is provided on one side of the hub left clamp 22, as Figure 5 , 6 , and a right arc-shaped groove 231 is provided on one side of the hub right clamp 23. When the left arc-shaped groove 221 and the right arc-shaped groove 231 are assembled, a first accommodation cavity 24 is formed in the middle part.

[0053] It should be noted that the shape of the first accommodation cavity 24 matches the shape of the sensor 1.

[0054] In a specific embodiment, as Figure 9 shown, a left wheel hub slider 211 and a right wheel hub slider 212 are respectively provided on the inner wall of the wheel hub protection housing 21. The left wheel hub slider 211 is provided on the left side of the inner wall of the wheel hub protection housing 21 and extends along the left side of the inner wall to form a strip-shaped slider; the right wheel hub slider 212 is provided on the right side of the inner wall of the wheel hub protection housing 21 and extends along the right side of the inner wall to form a strip-shaped slider. As Figure 7 , 8 shown, a left clamp slide rail 222 is provided inside the left wheel hub clamp 22. The left clamp slide rail 222 extends along the outside of the left wheel hub clamp 22 to both ends, forming a slide rail matching the left wheel hub slider 211. As Figure 5 , 6 shown, a right clamp slide rail 232 is provided outside the right wheel hub clamp 23. The right clamp slide rail 232 extends along the outside of the right wheel hub clamp 23 to both ends, forming a slide rail matching the right wheel hub slider 212.

[0055] Specifically, during use, the left wheel hub slider 211 and the right wheel hub slider 212 are respectively snapped into the left clamp slide rail 222 and the right clamp slide rail 232, and the left wheel hub clamp 22 and the right wheel hub clamp 23 are pushed into the wheel hub protection housing 21 along the directions of the left clamp slide rail 222 and the right clamp slide rail 232. The left wheel hub slider 211 and the right wheel hub slider 212 are respectively fixed in the left clamp slide rail 222 and the right clamp slide rail 232 by friction.

[0056] In a specific embodiment, as Figure 9 shown, a left base slider 25 and a right base slider 26 are provided on both sides of the wheel hub protection housing 21; as Figure 10 shown, a left base slide rail 31, a right base slide rail 32 and a base limit block 33 are provided on the upper surface of the arc-shaped base 3. The left base slider 25 can slide in the left base slide rail 31, the right base slider 26 can slide in the right base slide rail 32, and the base limit block 33 is used to limit the wheel hub protection housing 2.

[0057] Specifically, a raised edge extending upward is provided in a circle along the left side line, the rear side line, and the right side line on the upper surface of the arc-shaped base 3. A left base slide rail 31 is formed between the raised edge of the left side line of the arc-shaped base 3 and the upper surface, a right base slide rail 32 is formed between the raised edge of the right side line and the upper surface, and a base limit block 33 is formed between the raised edge of the rear side line and the upper surface.

[0058] More specifically, when in use, the left slider 25 of the base of the hub protection housing 21 is pushed into the left base slide rail 31, and the right slider 26 of the base is pushed into the right base slide rail 32. After the left slider 25 of the base and the right slider 26 of the base touch the base limit block 33, the left slider 25 of the base and the left base slide rail 31, and the right slider 26 of the base and the right base slide rail 32 are fixed by static friction.

[0059] In a specific embodiment, as Figure 11 shown, the sensor 1 is provided with a hollow channel 11, and a ferrite column 6 can be provided in the hollow channel 11. The ferrite column 6 is used to enhance the signal reception of the sensor.

[0060] It should be noted that the hollow channel 11 is a cylindrical opening, and the ferrite column 6 is a cylinder. When in use, the ferrite column 6 is inserted into the hollow channel 11 and fixed by static friction. In addition, the ferrite core in the ferrite column 6 is mainly composed of three metal elements: iron (Fe), manganese (Mn), and zinc (Zn). Since the ferrite core has no air gap and a consistent cross-sectional area, the magnetic effect is very high.

[0061] Furthermore, as Figure 16 shown, the auxiliary tooling further includes a fixing shell 5; as Figure 13 、 14 shown, the fixing shell 5 further includes a left fixing shell 51 and a right fixing shell 52. As Figure 14 shown, the left fixing shell 51 is provided with a left protective shell 511 and a left fixing member 512; as Figure 13 shown, the right fixing shell 52 is provided with a right protective shell 521 and a right fixing member 522. When the left protective shell 511 is connected to the right protective shell 521, a ferrite column receiving groove 53 is formed. Combining Figure 11 、 12 、13, the ferrite column 6 is disposed in the ferrite column receiving groove 53, and the ferrite column receiving groove 53 is disposed in the hollow channel 11. As Figure 15 shown, when the left fixing member 512 is connected to the right fixing member 522, a fixing member 54 is formed, and a second arc-shaped groove 541 is formed at the connection of the fixing member 54 and the ferrite column receiving groove 53.

[0062] It should be noted that the hollow channel 11 is a cylindrical opening, and the ferrite column receiving groove 53 is a cylinder. As Figure 3 and 12As shown, the ferrite column 6 is disposed in the ferrite column receiving groove 53. The ferrite column receiving groove 53 is disposed in the hollow channel 11 and is coaxially fitted with the hollow channel 11. At the same time, the outer diameter of the ferrite column receiving groove 53 fits with the radius of the hollow channel 11. The ferrite column is a commonly used electromagnetic signal aggregation device that can aggregate the electromagnetic signals received by the sensor, enhance the intensity of the electromagnetic signals, and enable them to penetrate deeper coating layers, which can meet the detection requirements without removing the insulation layer. In the present invention, different ferrite columns 6 can be replaced for different small-diameter pipes, or the ferrite column 6 or the fixed shell 5 can be removed when not needed. During use, the ferrite column 6 is placed into the ferrite column receiving groove 53, and the ferrite column receiving groove 53 is inserted into the hollow channel 11. It is fixed in the vertical direction by static friction and fixed in the horizontal direction by the limiting block 4.

[0063] Specifically, the fixed shell 5 is made of a non-magnetic material to avoid interfering with the electromagnetic signals collected by the sensor.

[0064] It is worth noting that both the left protective shell 511 and the right protective shell 521 are semi-cylinders with a hollow interior. When the left protective shell 511 and the right protective shell 521 are joined together, a ferrite column receiving groove 53 is formed in the middle part. The ferrite column receiving groove 53 is a hollow cylinder, and its inner diameter is larger than the radius of the ferrite column 6. One end of the left fixing member 512 and the right fixing member 522 is in a 1 / 4 arc shape, and the other end is flat. The radius of the arc-shaped ends of the left fixing member 512 and the right fixing member 522 is the same as the outer diameter of the ferrite column receiving groove 53. The arc-shaped end of the left fixing member 512 is connected to the left protective shell 511, and the arc-shaped end of the right fixing member 522 is connected to the right protective shell 521. When the left fixing member 512 and the right fixing member 522 are connected, the arc-shaped ends are also correspondingly connected to form a second arc-shaped groove 541. The radius of the second arc-shaped groove 524 is the same as the outer diameter of the ferrite column 6.

[0065] In a specific embodiment, as Figure 9 shown, a U-shaped opening 213 is provided at the upper part of the hub protection outer shell 21. A first arc-shaped groove 214 is provided at the end of the U-shaped opening 213. The first arc-shaped groove 214, the ferrite column receiving groove 53, and the second arc-shaped groove 54 are connected in sequence.

[0066] Specifically, when the first arc-shaped groove 214 and the second arc-shaped groove 54 are joined together, the ferrite column receiving groove 53 is formed. The ferrite column receiving groove 53 is a hollow cylinder, and its radius is the outer diameter of the ferrite column 6.

[0067] In a specific embodiment, as Figure 9 shown, left fixing member slide rails 215 and right fixing member slide rails 216 are provided below the two side edges of the U-shaped opening 213. As Figure 13 、 14As shown, left fixing part slider 55 and right fixing part slider 56 are provided on both sides of the fixed shell 5. The left fixing part slider 55 is slidably arranged in the left fixing part slide rail 215, and the right fixing part slider 56 is slidably arranged in the right fixing part slide rail 216.

[0068] It should be noted that the left fixing part slider 55 extends along the side of the left fixing part 512 to form a strip-shaped slider; the right fixing part slider 56 extends along the side of the right fixing part 522 to form a strip-shaped slider. Upper slide rails 215 are provided below both sides of the U-shaped opening 213, and the upper slide rails 215 extend along the direction of both sides to form strip-shaped slide rails.

[0069] As Figures 6 - 9 shown, a left limiting block 41 is provided on the upper part of the left hub clamp 22; a right limiting block 42 is provided on the upper part of the right hub clamp 23. The end of the left limiting block 41 is connected to the end of the right limiting block 42 to form a limiting block 4. The limiting block 4 abuts against the fixing part 54 and the side port of the U-shaped opening 213 to fix the fixed shell 5.

[0070] It should be noted that during use, the left fixing part slider 55 is pushed into the left fixing part slide rail 215, and the right fixing part slider 56 is pushed into the right fixing part slide rail 216. When the first arc-shaped groove 214 is spliced with the second arc-shaped groove 54, the locking is completed. The limiting block 4 abuts against the fixed shell 5 to keep it in a fixed position during use.

[0071] The present invention provides an assembly and use method for this device, and the specific steps are as follows:

[0072] 1) Fit the ferrite column 6 to one side of the left protective shell 511, and then fit the right protective shell 521 to the other side of the ferrite column 6. The ferrite column 6 is placed in the ferrite column receiving groove 53 formed by the left protective shell 511 and the right protective shell 521;

[0073] 2) Insert the ferrite column receiving groove 53 into the hollow channel 11 of the sensor 1, and fix the ferrite column receiving groove 53 in the hollow channel 11 through friction, and at the same time complete the fastening between the left protective shell 511 and the right protective shell 521;

[0074] 3) Fit one side of the sensor 1 to the left arc-shaped groove 221 of the left hub clamp 22 (or the right arc-shaped groove 231 of the right hub clamp 23), and then fit the right arc-shaped groove 231 of the right hub clamp 23 (or the left arc-shaped groove 221 of the left hub clamp 22) to the other side of the sensor 1. The first receiving cavity 24 formed by the left arc-shaped groove 221 and the right arc-shaped groove 231 is used to fix the sensor 1;

[0075] 4) Slide and fix the left hub slider 211 and the right hub slider 212 into the left clamp slide rail 222 and the right clamp slide rail 232 respectively, to complete the fastening between the left hub clamp 22, the sensor 1 and the right hub clamp 23, ensuring that the sensor 1 is fixed in the hub protection housing 21 and cannot move;

[0076] 5) At the same time as step 4), the left fixing part slider 55 and the right fixing part slider 56 are respectively slide-fixed in the left fixing part slide rail 215 and the right fixing part slide rail 216. At the same time, the second arc-shaped groove 541 formed at the connection between the fixing part 4 and the ferrite column receiving groove 53 and the first arc-shaped groove 214 provided in the U-shaped opening 513 abut against each other to fix the ferrite column receiving groove 53 in the hub protection housing 21. The limiting block 4 formed by the left limiting block 41 and the right limiting block 42 is used to further fix the position of the ferrite column receiving groove 53.

[0077] 6) Slide and fix the hub protection housing 21 through the left base slider 25 and the right base slider 26 into the left base slide rail 31 and the right base slide rail 32 respectively, to complete the fastening between the arc-shaped base 3 and the hub protection housing 2;

[0078] It should be noted that in the above steps, the sliders and the slide rails are fixed by friction. In particular, it should be noted that the friction generated between the left fixing part slider 55, the right fixing part slider 56 and the left fixing part slide rail 215, the right fixing part slide rail 216 is not only used to prevent the ferrite column receiving groove 53 from generating displacement in the horizontal position, but also can prevent the ferrite column receiving groove 53 from generating displacement in the vertical direction; other sliders and slide rails are all used to prevent the ferrite column receiving groove 53 from generating displacement in the horizontal direction.

[0079] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper / lower end", "inside", "outside", "front", "back", "one side", "the other side", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0080] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "set / sleeved with", "socketed", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0081] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Auxiliary tooling for pulsed eddy current testing of small-diameter pipes without removing insulation, including a sensor (1), Characterized in that: It further includes a sensor fixing part (2) and an arc-shaped bottom support (3); The sensor (1) is passed through the sensor fixing part (2); The sensor fixing part (2) is detachably connected to the arc-shaped bottom support (3); The lower surface of the arc-shaped bottom support (3) is arc-shaped and is used to fit the outer surface of the small-diameter pipe.

2. The auxiliary tooling for pulsed eddy current testing of small-diameter pipes without removing insulation according to claim 1, Characterized in that: The sensor fixing part (2) includes a hub protection housing (21), a left hub clamp (22), and a right hub clamp (23); The hub protection housing (21) is arranged on the upper surface of the arc-shaped bottom support (3); Both the left hub clamp (22) and the right hub clamp (23) are detachably connected to the hub protection housing (21); and when the left hub clamp (22) and the right hub clamp (23) are connected, a first accommodation cavity (24) is formed for clamping the sensor (1).

3. The auxiliary tooling for pulsed eddy current testing of small-diameter pipes without removing insulation according to claim 2, Characterized in that: A left arc-shaped groove (221) is arranged on the inner side of the left hub clamp (22); a right arc-shaped groove (231) is arranged on the inner side of the right hub clamp (23); The left arc-shaped groove (221) and the right arc-shaped groove (231) are connected to form the first accommodation cavity (24).

4. The auxiliary tooling for pulsed eddy current testing of small-diameter pipes without removing insulation according to claim 2 or 3, Characterized in that: The hub protection housing (21) is provided with a left hub slider (211) and a right hub slider (212); the left hub clamp (22) is provided with a left clamp slide rail (222); the right hub clamp (23) is provided with a right clamp slide rail (232); The left hub slider (211) is slidably arranged in the left clamp slide rail (222); the right hub slider (212) is slidably arranged in the right clamp slide rail (232).

5. The auxiliary tooling for pulsed eddy current testing of small-diameter pipes without removing insulation according to claim 4, Characterized in that: The outer side of the hub protection housing (21) is provided with a left bottom support slider (25) and a right bottom support slider (26); the upper surface of the arc-shaped bottom support (3) is provided with a left bottom support slide rail (31), a right bottom support slide rail (32), and a bottom support limit block (33); The left bottom support slider (25) is slidably arranged in the left bottom support slide rail (31); the right bottom support slider (26) is slidably arranged in the right bottom support slide rail (32); The bottom support limit block (32) is used for limiting the hub protection housing (21).

6. The auxiliary tooling for pulsed eddy current testing of small-diameter pipes without removing insulation according to claim 5, Characterized in that: The sensor (1) is provided with a hollow channel (11); A ferrite column (6) is arranged in the hollow channel (11); The ferrite column (6) is passed through the hollow channel (11) and is used to strengthen the signal reception of the sensor (1).

7. The auxiliary tooling for pulsed eddy current testing of small-diameter pipes without removing insulation according to claim 6, Characterized in that: It further includes a fixed housing (5); The fixed housing (5) further includes a left fixed housing (51) and a right fixed housing (52) that are detachably connected; The left fixed housing (51) and the right fixed housing (52) are detachably connected and form a ferrite column receiving groove (53) when connected; the ferrite column (6) is arranged in the ferrite column receiving groove (53); the ferrite column receiving groove (53) is arranged in the hollow channel (11).

8. The small-diameter pipe non-disassembly heat-insulated pulsed eddy current detection auxiliary tooling according to claim 7, characterized in that: An upper portion of the hub protection outer shell (21) is provided with a U-shaped opening (213); end portions of the U-shaped opening (213) are provided with first arc-shaped grooves (214); The left fixed housing (51) includes a left protection shell (511) and a left fixing member (512) that are connected to each other; the right fixed housing (52) includes a right protection shell (521) and a right fixing member (522) that are connected to each other; and a second arc-shaped groove (541) is formed at a connection portion between the left fixing member (512) and the right fixing member (522) and the ferrite column receiving groove (53); the first arc-shaped groove (214) abuts against the second arc-shaped groove (541) in an assembled state, and the ferrite column receiving groove (53) is arranged at the abutting portion.

9. The small-diameter pipe non-disassembly heat-insulated pulsed eddy current detection auxiliary tooling according to claim 8, characterized in that: Both side edges of the U-shaped opening (213) are provided with a left fixing member slide rail (215) and a right fixing member slide rail (216); both side edges of the fixed housing (5) are provided with a left fixing member slider (55) and a right fixing member slider (56); The left fixing member slider (55) is slidably arranged in the left fixing member slide rail (215); The right fixing member slider (56) is slidably arranged in the right fixing member slide rail (216).

10. The small-diameter pipe non-disassembly heat-insulated pulsed eddy current detection auxiliary tooling according to claim 9, characterized in that: An upper portion of the left hub clamp (22) is provided with a left limit block (41); an upper portion of the right hub clamp (23) is provided with a right limit block (42); The limit block (4) includes the left limit block (41) and the right limit block (42); End portions of the left limit block (41) and the right limit block (42) are detachably connected; The shown limit block (4) abuts against the fixing member (54) in an assembled state to limit the movement of the fixed housing (5).

Images