CN113533385A

CN113533385A - X-ray machine and detection method suitable for detecting performance of submarine cable joint

Info

Publication number: CN113533385A
Application number: CN202110779631.8A
Authority: CN
Inventors: 王波; 李晨光; 张振伟; 李立宠
Original assignee: Suzhou Axtek Photoelectric Technology Co ltd
Current assignee: Shaanxi Hengde Precision Machinery Co ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2021-10-22
Anticipated expiration: 2041-07-09
Also published as: CN115165935A; CN113533385B; CN115144416A

Abstract

The invention relates to an X-ray machine suitable for detecting the performance of a submarine cable joint and a detection method, wherein the X-ray machine comprises a rack, an X-ray film acquisition unit, a first driving unit and a second driving unit, wherein the rack comprises a rack seat, a positioning seat and a housing, and the first driving unit is used for driving the X-ray film acquisition unit to overturn and be positioned at an overturning angle; the second driving unit is used for driving the X-ray film acquisition unit to move transversely. On one hand, the X-ray film of each angle in the circumferential direction of the part to be detected can be obtained at multiple angles, and detection omission or detection angle overlapping is not easy to occur; on the other hand, the X-ray films of the two parts to be detected can be automatically acquired synchronously or successively in a closed space, so that the influence of external factors on the accurate acquisition of the X-ray films is avoided, the accuracy of detection results is improved, and qualified products are ensured to be used in submarine cables.

Description

X-ray machine and detection method suitable for detecting performance of submarine cable joint

Technical Field

The invention belongs to the field of X-ray machines, particularly relates to an X-ray machine suitable for detecting the performance of a submarine cable joint, and also relates to a submarine cable joint performance detection method.

Background

The X-ray machine mainly comprises an X-ray tube and an X-ray machine power supply, wherein the X-ray tube comprises a cathode filament, an anode target and a vacuum glass tube, the X-ray machine power supply can be divided into a high-voltage power supply and a filament power supply, the filament power supply is used for heating the filament, and a high-voltage output end of the high-voltage power supply is respectively arranged at two ends of the cathode filament and the anode target and provides a high-voltage electric field to accelerate active electrons on the filament to flow to the anode target so as to form a high-speed electron current.

Meanwhile, submarine cables are laid between the offshore booster station and the land and between the fan and the offshore booster station, are mainly used for transmitting high-power electric energy underwater, have the same effect as underground power cables, are more severe in application environment, and are far higher in transportation and laying difficulty than other cable products, so that the submarine cables must be manufactured and produced continuously in large length. The submarine cable joint has the structural size close to that of the submarine cable body, and has the same electrical performance, mechanical performance, bending performance and service life as the submarine cable body.

However, once bubbles appear inside the submarine cable joint or impurities are contained, the submarine cable joint is easy to damage and has a short service life, the submarine cable joint is inconvenient to replace, and meanwhile, the replacement cost is very high, so that before use, the internal structure of the submarine cable joint must be detected to reduce the damage probability after use.

At present, ultrasonic detection appears in the market, also there is X-ray detection, to X-ray detection, it mainly uses X-ray machine to shine the joint region, observe the X-ray piece in joint region, whether to exist impurity, micropore and eccentricity meet the demands, but if only detect a visual angle, can't embody submarine cable joint inner structure completely, if rotate the visual angle (need rotate 180 and can realize the detection of submarine cable joint round, this is mainly the characteristic decision of X-ray machine), the benchmark is difficult to confirm, and manual operation's the case, also difficult assurance turned angle is even, consequently, it is very big to have detection error probability.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an improved X-ray machine suitable for detecting the performance of a submarine cable joint.

Meanwhile, the invention also provides a submarine cable joint performance detection method.

The technical scheme of the invention is as follows: an X-ray machine suitable for submarine cable joint performance detection, it includes:

the device comprises a frame, a positioning seat and a cable connector, wherein the frame comprises a frame seat and the positioning seat;

an irradiation end comprising an X-ray tube;

the collecting end is used for receiving the X-ray emitted by the irradiation end;

a connecting part connecting the irradiation end and the harvesting end, wherein the irradiation end, the harvesting end and the connecting part form an X-ray film acquisition unit, and an X-ray detection area is formed between the irradiation end and the harvesting end, particularly,

be formed with on the frame seat and can open or closed housing, the housing forms the closed space with the frame seat, the positioning seat is located the closed space, the submarine cable connects from the unsettled setting in the relative both sides of positioning seat in the joint position at both ends, X-ray detection district can cover any joint position, the X-ray machine is still including setting up on the frame seat and being used for driving the X-ray piece and obtaining the unit and overturn and fix a position the first drive unit at turnover angle round the submarine cable joint axial lead direction of location on the positioning seat, a second drive unit for driving the X-ray piece and obtaining the length direction removal that the unit connects along the submarine cable of location on the positioning seat.

Preferably, the frame base comprises a frame and a truss, wherein the truss is far away from the positioning seat and is positioned behind the positioning seat, the X-ray film acquisition unit can avoid the positioning seat and is arranged on the truss in a sliding manner, the first driving unit is used for driving the truss and the X-ray film acquisition unit to turn over synchronously, and after the truss and the X-ray film acquisition unit rotate for each angle, the X-ray detection area deflects and acquires an X-ray film at the joint part at the corresponding position; the second driving unit drives the X-ray film acquisition unit to move relative to the truss so that the X-ray detection area is shifted between the two joint parts. Therefore, after the rotation adjustment, the X-ray films under the corresponding angles can be obtained, and the accuracy of the detection result is ensured under the judgment of a plurality of X-ray films.

According to a specific implementation and preferred aspect of the invention, after the first driving unit turns the truss by N degrees, one X-ray film of the joint part at the deflection position is obtained, and after the sum of the turning angles is equal to 180 degrees, the X-ray film obtaining unit obtains a plurality of X-ray films in the circumferential direction of the joint part. Therefore, after the turnover angle is 180 degrees, the comprehensive detection of the joint part can be realized.

Preferably, N is more than or equal to 10 and less than or equal to 20, wherein the angles of the trusses turned over each time are equal, and the turning directions are the same. Ensuring that a plurality of X-ray films, specifically N =15, are obtained for a comprehensive examination of the joint site step by step, on the premise of relative uniformity, so that 13X-ray films can be obtained.

According to a specific implementation and preferred aspect of the present invention, the first driving unit includes an arc-shaped guide rail taking the center of the submarine cable joint positioned on the positioning seat as a center of a circle, a plurality of moving guide wheels arranged on the truss and capable of matching with the arc-shaped guide rail, a driving motor arranged on the truss, and a driving roller arranged at an output end of the driving motor and matching with the arc-shaped guide rail, wherein the moving guide wheels are correspondingly distributed on the inner side and the outer side of the arc-shaped guide rail, and when the driving roller rolls relative to the arc-shaped guide rail, the truss is relatively turned; when the driving roller is static relative to the arc-section guide rail, the driving roller and the movable guide wheel relatively fix the truss and the arc-section guide rail, and the X-ray film acquisition unit acquires an X-ray film at the joint part at the corresponding position. The acquisition of 13X-ray films is realized by the relative rotation of the driving roller under the matching of the arc section guide rail and the movable guide wheel.

Preferably, the arc section guide rail has two, and corresponds the setting on the frame inner wall of positioning seat both sides, and the truss includes along the mainboard that the length direction of location back submarine cable connects extends, sets up the end plate at mainboard both ends, and the removal leading wheel divide into two sets ofly, and every group removes the leading wheel and corresponds the setting on the end plate. The principle that a straight line is determined by two points enables the X-ray film acquisition unit to be overturned more stably, and the overturning angle is convenient to control.

Furthermore, the arc section guide rail comprises an arc rail frame and an arc rail, wherein the arc rail frame is fixed on the inner wall of the frame, a wheel groove matched with the arc rail is formed on the movable guide wheel, and the driving roller rolls on the inner wall of the arc rail frame. Under the cooperation of the wheel grooves, the contact area is increased, and the relative positioning of the truss and the arc section guide rail is more favorably realized in a static state, so that the corresponding X-ray film is obtained under the stable overturning angle position.

In this example, the wheel groove has a V-shaped cross section. The probability of derailment is low.

Preferably, each group of the three movable guide wheels is provided, two of the movable guide wheels are positioned on the inner side of the circular arc track, one movable guide wheel is positioned on the outer side of the circular arc track, the three movable guide wheels are distributed in a triangular mode, and the wheel center of the driving roller wheel is positioned in an area formed by the three movable guide wheels. Through the position distribution of three removal leading wheel and drive roller, can be under the non-pivoted prerequisite of drive roller, with drive roller location on the circular arc section guide rail to satisfy the acquirement of X-ray piece under the different angles.

According to a further embodiment and preferred aspect of the present invention, the second driving unit includes a linear rail located on the main board and extending along a length direction of the main board, and a linear driving member, wherein the connecting portion is slidably disposed on the linear rail, and the linear driving member is a telescopic rod or a driving screw rod matched with the connecting portion. Under the drive of the linear driving piece, the X-ray film acquisition unit avoids the positioning seat and moves from one joint part to the other joint part, thereby completing the X-ray film detection of the two joints.

Specifically, in this embodiment, the linear driving member is a driving screw, wherein a driving motor of the driving screw is correspondingly disposed on the back surface of the main board, the driving motor is disposed on the front surface of the main board and fixed on the end plate, and the driving motor are relatively and symmetrically disposed on opposite ends of the main board. Therefore, the center of gravity is relatively centered, and the deflection of the X-ray film acquisition unit or the switching of the detection part is more facilitated.

In addition, the positioning seat includes the first location portion that fixes in the frame seat and fix a position from the submarine cable joint middle part and be located the relative both sides of first location portion and supply the submarine cable joint to wear out and the second location portion of location from the tip. Therefore, three-point positioning can be implemented at the two end parts and the middle part of the submarine cable joint, so that omission or repetition of the obtained X-ray film caused by rotation or displacement of the submarine cable joint during detection is avoided, and the accuracy of the detection result is further influenced.

Meanwhile, the X-ray machine further comprises a first sensor for monitoring the closing state of the housing and a second sensor for monitoring the positioning and displacement state of the submarine cable joint. Under the arrangement of the first sensor, the X-ray film is ensured to be acquired in the closed area, so that the influence of external factors on the accuracy of the detection result is avoided; as for the setting of second sensor, ensure the positioning accuracy who connects at the submarine cable, also ensure simultaneously that the submarine cable connects and can not take place the skew, so, in many X-ray pieces, avoid appearing omitting or repeating, and then ensure the degree of accuracy of testing result.

The other technical scheme of the invention is as follows: a submarine cable joint performance detection method comprises the following steps:

1) the method comprises the following steps of firstly suspending the submarine cable joint from joint parts at two ends on two opposite sides of a positioning seat, closing a detection space, covering one joint part with an X-ray detection area formed by an X-ray detection unit consisting of an irradiation end, a harvesting end and a connecting part, and gradually overturning and axially and transversely moving the X-ray detection area in the same direction by the axis of the submarine cable joint through the X-ray detection area, wherein after the X-ray detection area is overturned and positioned at a corresponding overturning position after every N degrees of overturning, simultaneously obtaining X-ray films at corresponding positions, and simultaneously obtaining or successively obtaining the X-ray films at the positions corresponding to the circumferential gradually-changed angles of the two joint parts until the sum of the overturning angles is equal to 180 degrees;

2) the X-ray film analysis comprises (a) color comparison analysis, wherein the X-ray film images obtained in the step 1) are compared, the gray difference of a gray area is automatically identified, and abnormal points are found out, wherein air is white, the joint part to be detected is gray, metal impurities are black, and air bubbles are light gray; (b) and comparing and analyzing the size, measuring the size of the abnormal point found by the color comparison and analysis, if the measured size meets the qualified standard, judging to be qualified, otherwise, judging to be unqualified.

Preferably, N is more than or equal to 10 and less than or equal to 20 in the step 1), and the angle of each overturn of the X-ray detection area is equal. Ensure to gradually obtain a plurality of X-ray films for comprehensively detecting the joint part on the premise of relative uniformity.

According to a specific implementation and preferred aspect of the present invention, N =15, and any fixed angle is taken as a starting point, and the X-ray films at the pair of positions are acquired, then the X-ray films are turned in the same direction, and one X-ray film is taken down every 15 ° turn until the turning angle is equal to 180 ° later, at this time, the acquisition of 13X-ray films in the circumferential direction of two joint locations at each turning angle can be simultaneously completed, or the acquisition of 13X-ray films in the circumferential direction of one joint location is completed first, and then the acquisition of 13X-ray films in the circumferential direction of one joint location is completed. The angle corresponding to the obtained X-ray film cannot deviate, and detection omission or repeated detection is avoided.

Compared with the prior art, the invention has the following advantages:

on one hand, the X-ray film of each angle in the circumferential direction of the part to be detected can be obtained at multiple angles, and detection omission or detection angle overlapping is not easy to occur; on the other hand, the X-ray films of the two parts to be detected can be automatically acquired synchronously or successively in a closed space, so that the influence of external factors on the accurate acquisition of the X-ray films is avoided, the accuracy of detection results is improved, and qualified products are ensured to be used in submarine cables.

Drawings

FIG. 1 is a schematic diagram of an X-ray apparatus according to the present invention;

FIG. 2 is a schematic view of the X-ray machine shown in FIG. 1 after the housing is opened;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a schematic right-side view of FIG. 3;

wherein: 1. a frame; 10. a frame seat; 10a, a frame; 10b, a truss; b1, a main board; b2, end plates; 11. positioning seats; 11a, a first positioning portion; 11b, a second positioning part; 12. a housing; 13. a handle; 14. a base; 15. a walking roller;

2. an X-ray film acquisition unit; 20. an irradiating end; 21. a collecting end; 22. a connecting portion;

3. a first drive unit; 30. a circular arc section guide rail; 300. a circular arc track frame; 301. a circular arc track; 31. moving the guide wheel; 31a, wheel grooves; 32. a drive motor; 33. driving the roller;

4. a second driving unit; 40. a linear track; 41. a linear drive; 410. a drive motor;

5. a first sensor;

6. a second sensor;

J. a sea cable joint; j. a joint site.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature. It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1 and fig. 2, the X-ray machine suitable for detecting the performance of a submarine cable joint of the present embodiment includes a frame 1; an irradiation end 20, a collection end 21, and a connection portion 22 constituting the X-ray sheet acquisition unit 2; the first driving unit 3 is used for driving the X-ray film acquisition unit 2 to overturn and is positioned at an overturning angle; a second driving unit 4 for driving the X-ray film obtaining unit 2 to move laterally.

Specifically, the rack 1 includes a rack seat 10 and a positioning seat 11, wherein the submarine cable joint J is positioned on the positioning seat 11.

In this example, the rack holder 10 includes a rack frame 10a and a truss 10b, wherein the rack frame 10a is formed with an opening, and the rack 1 further includes a housing 12 (a closed state in fig. 1, and an open state in fig. 2) rotatably provided on the rack frame 10a and capable of opening or closing the opening.

Specifically, the housing 12 and the frame 10a form a closed space, and the positioning seat 11 is located in the closed space.

In this embodiment, gas springs or telescopic rods are provided on both sides of the frame 10a, wherein the housing 12 is opened or closed by the telescopic movement of the gas springs or telescopic rods.

A handle 13 may also be formed on the housing 12 for ease of operation.

In this example, the cover 12 is pivotally connected to the open top edge of the frame 10a from the top edge by a hinge.

The truss 10b extends in the left-right direction and is located behind the positioning seat 11.

The positioning seat 11 includes a first positioning portion 11a fixed in the frame seat 10 and positioned from the middle of the submarine cable joint J, and second positioning portions 11b located at the left and right sides of the first positioning portion 11a and allowing the end of the submarine cable joint J to penetrate out and be positioned. Therefore, three-point positioning can be implemented at the two end parts and the middle part of the submarine cable joint, so that omission or repetition of the obtained X-ray film caused by rotation or displacement of the submarine cable joint during detection is avoided, and the accuracy of the detection result is further influenced.

Specifically, second location portion 11b corresponds the setting in the left and right sides of the opening of frame 10a, and is in the intersection of opening edge, forms the bayonet socket on housing 12 simultaneously, and when housing 12 was closed, the bayonet socket block was on second location portion 11b for housing 12 closed back stability and leakproofness are higher, avoid external environment to influence the erroneous judgement of testing result.

Meanwhile, after the submarine cable joint J is positioned, the two joint parts J are suspended between the first positioning part 11a and the second positioning part 11b of the corresponding end part, so that the positioning seat 11 can be avoided by the rotation or the transverse movement of the X-ray film acquisition unit 2.

Referring to FIG. 3, the irradiation end 20 includes an X-ray tube; a collecting end 21 for receiving the X-ray emitted from the irradiation end 20; the connecting portion 22 connects the irradiation end 20 and the collection end 21, and an X-ray detection area is formed between the irradiation end 20 and the collection end 21, which are conventional arrangements, and will not be described in detail herein, and are clearly practicable, and meanwhile, it should be noted that the X-ray film obtaining unit 2 is slidably disposed on the truss 10b from the connecting portion 22.

Specifically, the X-ray detection area can cover any joint position j, and the X-ray machine is used for acquiring X-ray films displayed by the internal structures of the joint positions j from multiple angles.

In this example, the first driving unit 3 is configured to drive the truss 10b and the X-ray film obtaining unit 2 to turn over synchronously, and after each rotation of one angle, the X-ray detection area deflects and obtains one X-ray film at the joint position j at the corresponding position; the second driving unit 4 drives the movement of the X-ray film obtaining unit 2 with respect to the truss 10b to shift the real X-ray detection area between the two joint locations j. Therefore, after the rotation adjustment, the X-ray films under the corresponding angles can be obtained, and the accuracy of the detection result is ensured under the judgment of a plurality of X-ray films; meanwhile, the X-ray film acquisition unit 2 is shifted, so that the joint parts j can be detected simultaneously or sequentially.

Specifically, after the first driving unit 3 drives the truss 10b to turn over N each time, one X-ray film of the joint position j at the deflection position is obtained, and after the sum of the turning angles is equal to 180 degrees, the X-ray film obtaining unit obtains a plurality of circumferential X-ray films of the joint position. Therefore, after the turnover angle is 180 degrees, the comprehensive detection of the joint part can be realized.

In this example, N =15, where the angles of each turn of the truss 10b are equal and the turning directions are the same. On the premise of relatively uniform, 13X-ray films for comprehensive detection of the joint part are gradually obtained, and meanwhile, under the condition of the overturning angle, the 13X-ray films can be quickly and accurately obtained, so that the detection result has higher accuracy.

The first driving unit 3 comprises an arc-section guide rail 30 taking the center of the submarine cable joint J positioned on the positioning seat 11 as a circle center, a movable guide wheel 31 arranged on the truss 10b and capable of being matched with the arc-section guide rail 30, a driving motor 32 arranged on the truss 10b, and a driving roller 33 arranged at the output end of the driving motor 32 and matched with the arc-section guide rail 30, wherein the movable guide wheels 31 are distributed on the inner side and the outer side of the arc-section guide rail 30 correspondingly, and when the driving roller 33 rolls relative to the arc-section guide rail 30, the truss 10b turns relatively; when the driving roller 33 is stationary relative to the arc-segment guide rail 30, the driving roller 33 and the movable guide wheel 31 relatively fix the truss 10b and the arc-segment guide rail 30, and the X-ray film acquisition unit acquires an X-ray film at the joint part corresponding to the X-ray film acquisition unit. The acquisition of 13X-ray films is realized by the relative rotation of the driving roller under the matching of the arc section guide rail and the movable guide wheel.

In this embodiment, there are two arc-segment guide rails 30, and the two arc-segment guide rails are correspondingly disposed on the inner walls of the frame frames 10a on the left and right sides of the positioning seat 11.

Specifically, the arc-segment guide rail 30 includes an arc-rail frame 300 and an arc-rail 301, wherein the arc-rail frame 300 is fixed on the inner wall of the frame 10a, a wheel groove 31a matched with the arc-rail 301 is formed on the movable guide wheel 31, and the driving roller 33 rolls on the inner wall of the arc-rail frame 300. Under the cooperation of the wheel groove 31a, the contact area is increased, and the relative positioning of the truss and the arc section guide rail is more favorably realized in a static state, so that the corresponding X-ray film is obtained under a stable overturning angle position.

In this example, the wheel groove 31a has a V-shaped cross section. The probability of derailment is low.

The truss 10b includes a main plate b1 extending along the length direction of the positioned submarine cable joint J, and end plates b2 disposed at both ends of the main plate b1, the moving guide wheels 31 are divided into two groups, and each group of moving guide wheels 31 is correspondingly disposed on the end plate b 2. The principle that a straight line is determined by two points enables the X-ray film acquisition unit to be overturned more stably, and the overturning angle is convenient to control.

As shown in fig. 4, each set of three movable guide wheels 31 includes two movable guide wheels 31 located inside the circular arc track 301 and one movable guide wheel 31 located outside the circular arc track 301, and the three movable guide wheels 31 are distributed in a triangular shape, and the wheel center of the driving roller 33 is located in the area formed by the three movable guide wheels 31. Through the position distribution of three removal leading wheel and drive roller, can be under the non-pivoted prerequisite of drive roller, with drive roller location on the circular arc section guide rail to satisfy the acquirement of X-ray piece under the different angles.

The second driving unit 4 includes a linear rail 40 located on the main board b1 and extending along the length direction of the main board b1, and a linear driving member 41, wherein the connecting portion 22 is slidably disposed on the linear rail b1, and the linear driving member 41 is a telescopic rod or a driving screw matched with the connecting portion. Under the drive of the linear driving piece, the X-ray film acquisition unit avoids the positioning seat and moves from one joint part to the other joint part, thereby completing the X-ray film detection of the two joints.

Specifically, the linear driving element 41 is a driving screw, wherein the driving motor 410 of the driving screw is correspondingly disposed on the back side of the main board b1, the driving motor 32 is disposed on the front side of the main board b1 and fixed on the end board b2, and the driving motor 410 and the driving motor 32 are relatively and balancedly disposed on opposite ends of the main board b 1. Therefore, the center of gravity is relatively centered, and the deflection of the X-ray film acquisition unit or the switching of the detection part is more facilitated.

In addition, the X-ray machine comprises a first sensor 5 for monitoring the closed state of the housing 12, and a second sensor 6 for monitoring the positioning and displacement state of the submarine cable joint J.

Specifically, first sensor 5 and the even touch sensor of second sensor 6, to first sensor 5 as long as behind the closed opening of housing 12, just can contradict on first sensor 5, consequently, under the setting of first sensor 5, ensure to acquire the X-ray piece in the closed region to avoid external factor to influence the accuracy of testing result.

Second sensor 6, the both ends at submarine cable joint J are established to the correspondence, and be close to the inboard setting of second location portion 11b, wherein every sensor conflicts on the side of the axle head of submarine cable joint J after the location, in order to avoid detection error, the side of every axle head is equipped with two second sensors 6 at least, in order to ensure that submarine cable joint J can not take place axial or circumferential removal, consequently, ensure submarine cable joint J's the positioning accuracy, also ensure simultaneously that submarine cable joint can not take place the skew, so, in many X-ray pieces, avoid appearing omitting or repeating, and then ensure the degree of accuracy of testing result.

Meanwhile, the arrangement of the first sensor 5 and the second sensor 6 can also facilitate the automatic detection of an X-ray machine, namely, after the submarine cable joint J is positioned, the housing 12 can be closed, then, the turning or traversing operation of an X-ray film acquisition unit is carried out in a closed area, the joint part J can obtain a needed X-ray film at a corresponding angle, then, whether the internal structure of the joint part J is qualified or not is judged by analyzing the image of the X-ray film, the qualified product is ensured to be used in a submarine cable, and the damage probability of the submarine cable joint J after use is greatly reduced.

In this example, a base 14 is formed at the bottom of the frame 1, wherein four walking rollers 15 are distributed at four corners of the base 14.

In summary, the method for detecting the performance of the submarine cable joint comprises the following steps:

1) firstly, suspending the submarine cable joints from the joint parts at two ends on two opposite sides of the positioning seat, closing the detection space, then an X-ray detection area formed by an X-ray film acquisition unit consisting of an irradiation end, a harvesting end and a connecting part covers one joint part, and gradually overturns and moves transversely in the same direction with the axis of the submarine cable joint through the X-ray film acquisition unit, wherein any fixed angle is taken as a starting point, the X-ray films at the pair of positions are obtained, then the X-ray films are turned in the same direction, one X-ray film is taken down after 15 degrees of turning until the turning angle is equal to 180 degrees, at the moment, the obtaining of 13X-ray films at the circumferential direction of two joint parts at each turning angle can be simultaneously completed, or the acquisition of 13X-ray films in the circumferential direction of one joint part is completed firstly, and then the acquisition of 13X-ray films in the circumferential direction of one joint part is completed;

Therefore, the present embodiment has the following advantages:

1) the X-ray films of the joint part at all angles can be obtained gradually by the same-direction turning and positioning of the X-ray detection area and under the coverage of the detection area, so that the detection angles of the obtained X-ray films are not overlapped and omitted, and the X-ray films can be obtained fully automatically;

2) firstly, performing image color difference analysis, quickly finding out abnormal points, then performing size comparison, and judging whether the abnormal points are qualified or not, thereby ensuring that qualified products are used in submarine cables;

3) by the transverse movement of the X-ray detection area, the X-ray films can be obtained in the same closed area at two joint parts in sequence or at the same angle, so that the X-ray films of the submarine cable joint at various angles in the circumferential direction can be rapidly and accurately obtained;

4) the X-ray film is obtained in the relatively closed cavity by adopting the closed housing, so that the influence of external factors on the accurate acquisition of the X-ray film is avoided;

5) the driving idler wheel can be positioned on the arc section guide rail on the premise that the driving idler wheel does not rotate through the position distribution of the three movable guide wheels and the driving idler wheel, so that the acquisition of X-ray films at different angles is met, and the acquisition accuracy of the X-ray films is further ensured;

6) under the arrangement of the first sensor, the X-ray film is ensured to be obtained in the closed area, so that the influence of external factors on the accuracy of the detection result is avoided; under the second sensor, ensure the positioning accuracy of submarine cable joint, also ensure simultaneously that submarine cable joint can not take place the skew, so, in 13X-ray pieces, avoid appearing omitting or repetition, and then ensure the degree of accuracy of testing result, simultaneously, the implementation of the automated inspection of the X-ray machine of also being convenient for.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.

Claims

1. An X-ray machine suitable for submarine cable joint performance detection, it includes:

a frame comprising a frame seat and a positioning seat, wherein the submarine cable joint is positioned on the positioning seat;

an irradiation end comprising an X-ray tube;

the connecting part connects the irradiation end with the collection end, wherein the irradiation end, the collection end and the connecting part form an X-ray film acquisition unit, and an X-ray detection area is formed between the irradiation end and the collection end, and the X-ray film acquisition unit is characterized in that:

the X-ray machine comprises a frame seat, a positioning seat, a submarine cable joint, an X-ray detection area, a first driving unit and a second driving unit, wherein the frame seat is provided with a housing which can be opened or closed, the housing and the frame seat form a closed space, the positioning seat is positioned in the closed space, the submarine cable joint is arranged at two ends of the positioning seat in a hanging mode, the X-ray detection area can cover any joint part, the X-ray machine further comprises the first driving unit and the second driving unit, the first driving unit is arranged on the frame seat and used for driving the X-ray film obtaining unit to overturn around the axis direction of the submarine cable joint positioned on the positioning seat and to be positioned at the overturning angle, and the second driving unit is used for driving the X-ray film obtaining unit to move along the length direction of the submarine cable joint positioned on the positioning seat.

2. The X-ray machine suitable for submarine cable joint performance detection according to claim 1, characterized by: the frame seat comprises a frame and a truss, wherein the truss is far away from the positioning seat and is positioned behind the positioning seat, the X-ray film acquisition unit can avoid the positioning seat and is arranged on the truss in a sliding manner, the first driving unit is used for driving the truss and the X-ray film acquisition unit to turn over synchronously, and after the truss and the X-ray film acquisition unit rotate for each angle, the X-ray detection area deflects and acquires an X-ray film at the joint part at the corresponding position; the second driving unit drives the X-ray film acquisition unit to move relative to the truss so as to realize the displacement of the X-ray detection area between the two joint parts.

3. The X-ray machine suitable for submarine cable joint performance detection according to claim 2, characterized by: and after the first driving unit drives the truss to turn over for N degrees, an X-ray film of the joint part at the deflection position is obtained, and after the sum of the turning angles is equal to 180 degrees, the X-ray film obtaining unit finishes the obtaining of a plurality of groups of X-ray films on the circumferential direction of the joint part.

4. The X-ray machine suitable for submarine cable joint performance detection according to claim 3, characterized by: n is more than or equal to 10 and less than or equal to 20, wherein the angles of the trusses in each overturning are equal, and the overturning directions are the same.

5. The X-ray machine suitable for submarine cable joint performance testing according to claim 2 or 3 or 4, characterized by: the first driving unit comprises an arc-section guide rail, a movable guide wheel, a driving motor and a driving roller wheel, wherein the arc-section guide rail takes the center of the submarine cable joint positioned on the positioning seat as the center of a circle, the movable guide wheel is arranged on the truss and can be matched with the arc-section guide rail, the driving motor is arranged on the truss, the driving roller wheel is arranged at the output end part of the driving motor and is matched with the arc-section guide rail, the movable guide wheels are distributed on the inner side and the outer side of the arc-section guide rail correspondingly, and when the driving roller wheel rolls relative to the arc-section guide rail, the truss turns over relatively; when the driving roller is static relative to the arc-segment guide rail, the driving roller and the movable guide wheel relatively fix the truss and the arc-segment guide rail, and the X-ray film acquisition unit acquires an X-ray film at the joint part at the corresponding position.

6. The X-ray machine suitable for submarine cable joint performance detection according to claim 5, characterized by: the arc section guide rails are two and correspondingly arranged on the inner walls of the frame frames on two sides of the positioning seat, the truss comprises a main board extending along the length direction of the submarine cable joint after positioning and end plates arranged at two ends of the main board, the movable guide wheels are divided into two groups, and each group of the movable guide wheels are correspondingly arranged on the end plates.

7. The X-ray machine suitable for submarine cable joint performance detection according to claim 6, characterized by: the arc section guide rail comprises an arc rail frame and an arc rail, wherein the arc rail frame is fixed on the inner wall of the frame, wheel grooves matched with the arc rail are formed in the movable guide wheels, and the driving rollers roll on the inner wall of the arc rail frame.

8. The X-ray machine suitable for submarine cable joint performance detection according to claim 7, characterized by: and the number of the movable guide wheels in each group is three, two of the movable guide wheels are positioned on the inner side of the circular arc track, one movable guide wheel is positioned on the outer side of the circular arc track, the three movable guide wheels are distributed in a triangular mode, and the wheel center of the driving roller is positioned in an area formed by the three movable guide wheels.

9. The X-ray machine suitable for submarine cable joint performance detection according to claim 6, characterized by: the second drive unit is including being located on the mainboard and along the straight line track that mainboard length direction extends and linear driving spare, wherein connecting portion slide to set up on the straight line track, linear driving spare be the telescopic link or with connecting portion assorted drive screw.

10. A submarine cable joint performance detection method comprises the following steps:

1) acquiring an X-ray film;

2) analyzing an X-ray film;

the method is characterized in that:

in the step 1), the X-ray film is obtained by using the X-ray machine as claimed in any one of claims 1 to 9, firstly suspending the submarine cable joints from the joint parts at two ends on two opposite sides of the positioning seat, closing the detection space, then covering one joint part with an X-ray detection area formed by an X-ray film obtaining unit consisting of an irradiation end, a harvesting end and a connecting part, and gradually overturning and axially traversing in the same direction by using the axis of the submarine cable joint through the X-ray film obtaining unit, wherein after each overturning for N degrees, the X-ray detection area is overturned and positioned at a corresponding overturning position, and simultaneously obtaining X-ray films at corresponding positions until the sum of overturning angles is equal to 180 degrees, and then completing the simultaneous obtaining or sequential obtaining of the X-ray films at the positions corresponding to the circumferentially gradually-changed angles of the two joint parts;

step 2), comparing and analyzing colors, namely comparing the X-ray images obtained in the step 1), automatically identifying gray difference of a gray area, and finding out abnormal points, wherein air is white, the joint part to be detected is gray, metal impurities are black, and air bubbles are light gray; (b) and comparing and analyzing the size, measuring the size of the abnormal point found by the color comparison and analysis, if the measured size meets the qualified standard, judging to be qualified, otherwise, judging to be unqualified.