CN111426753A - Contact type probe mounting rack and fixing system for vertical flaw scanning - Google Patents
Contact type probe mounting rack and fixing system for vertical flaw scanning Download PDFInfo
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- CN111426753A CN111426753A CN202010379573.5A CN202010379573A CN111426753A CN 111426753 A CN111426753 A CN 111426753A CN 202010379573 A CN202010379573 A CN 202010379573A CN 111426753 A CN111426753 A CN 111426753A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N2291/0234—Metals, e.g. steel
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
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- G01N2291/105—Number of transducers two or more emitters, two or more receivers
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Abstract
The invention provides a contact type probe mounting rack for vertical flaw scanning, which comprises a probe bracket and a connecting plate for connecting the probe bracket and a flaw detection vehicle, wherein the probe bracket is provided with at least three probes arranged along the movement direction of the flaw detection vehicle, and the probe bracket comprises at least one transmitting probe or at least one receiving probe; ultrasonic waves sent by the transmitting probe can be received by one receiving probe after being subjected to vertical damage inside the rail and two-time mirror reflection on the bottom surface of the rail, and a plurality of probes on the probe support can be matched to scan vertical damage at a plurality of heights in a flaw detection area. The fixing system of the mounting frame comprises a probe frame fixedly connected with the connecting plate, the probe frame is arranged on a fixing frame, the fixing frame is fixedly connected with the flaw detection vehicle, and two traveling wheels are respectively arranged at two ends of at least the bottom of the fixing frame. The mounting frame and the fixing system provided by the invention can ensure that the probe is centered and pressed on the track.
Description
Technical Field
The invention relates to the technical field of rail flaw detection, in particular to a contact type probe mounting rack and a fixing system for vertical flaw scanning.
Background
During the welding process of the rail, defects may be generated during the welding process due to the problems of unstable welding equipment, improper process parameter selection, rail base metal quality and the like, wherein the defects include volume defects such as looseness, slag inclusion and the like; in order to ensure the driving safety, the defects must be detected early, such as the shape of a plane, such as micro-cracks, gray spots, unwelded parts and the like.
The current flaw detection mainly uses an ultrasonic probe, and because the medium in the track is uniform, the ultrasonic wave can generate mirror reflection after encountering the flaw; based on the principle, the current steel rail flaw detection method mainly utilizes a plurality of probes with different angles to transmit ultrasonic signals, and when the ultrasonic signals encounter damage perpendicular to the propagation direction, mirror reflection occurs to enable the ultrasonic waves to return along a transmission path to be received by the transmitting probes.
However, for the flaws 30 and 31 shown in fig. 1, since the flaw bottom surface is perpendicular to the rail bottom surface, and the ultrasonic signals obliquely transmitted from the upper surface of the rail at any angle are subjected to mirror reflection when encountering the vertical flaw, the ultrasonic waves cannot return to the transmitting probe as they are, and if the rail has a vertical flaw, the conventional flaw detection method cannot detect the flaw, so that the rail cannot be replaced or repaired in time, and a serious safety risk is generated for the train operation.
Referring to fig. 1, for vertical flaw detection, chinese patent applications CN208721616U, CN207552826U, and CN206281846U disclose a tandem scanning frame with similar principle, two transmitting probes 10 and receiving probes 20 capable of synchronously approaching or departing from a central point of the scanning frame are arranged on the scanning frame, an ultrasonic signal is transmitted through the transmitting probe 10, if a vertical flaw 30 is encountered, the vertical flaw 30 and a bottom surface of the scanning frame are subjected to mirror reflection twice and return to the receiving probes 20, and the transmitting probe 10 and the receiving probe 20 are manually or automatically moved to positions of the transmitting probe 10 'and the receiving probe 20' synchronously, so that a vertical flaw 31 with another height can be detected, and the positions of the two probes are gradually and synchronously adjusted, so that flaw detection in the whole vertical plane of a current scanning position can be realized.
Based on the above working principle, chinese patent application CN106198760A provides a rail weld ultrasonic imaging detection method and system based on dual-array probe, which realizes K-type scanning and tandem scanning of a rail by two sets of contact probes in different directions, taking K-type scanning as an example, a scanning system is formed by using one contact probe as a transmitting probe and the other transmitting probe as a receiving probe, and when working, the two probes need to move relatively or reversely at a constant speed, so as to achieve comprehensive detection of the whole height range of the current scanning position A contact probe system of (1).
Disclosure of Invention
The technical problem to be solved by the invention is to provide a contact type probe mounting rack capable of simultaneously carrying out flaw detection on a plurality of heights within the height range of a flaw detection area and a fixing system for fixing the mounting rack on a flaw detection vehicle so as to realize continuous flaw detection scanning of a track.
The invention solves the technical problems through the following technical scheme:
a contact type probe mounting rack for vertical flaw scanning comprises a probe bracket capable of being placed on the surface of a track and a connecting plate for connecting the probe bracket and a flaw detection vehicle, wherein the connecting plate is fixedly connected with the probe bracket along the direction vertical to the surface of the track, and the probe bracket is tightly pressed on the surface of the track; the probe bracket is provided with at least three contact probes arranged along the moving direction of the flaw detection vehicle, wherein the at least three contact probes comprise at least one transmitting probe or at least one receiving probe; ultrasonic waves sent by the transmitting probe can be received by one receiving probe after being subjected to vertical damage inside the rail and two-time mirror reflection on the bottom surface of the rail, and a plurality of probes on the probe support can be matched to scan vertical damage at a plurality of heights in a flaw detection area.
According to the method, the plurality of contact probes are distributed along the surface of the track, the purpose of simultaneously detecting a plurality of heights in a flaw detection area is achieved through different combination modes, and the blank of the prior art is filled.
Preferably, at least one fixing shaft perpendicular to the surface of the track is fixedly arranged at each of two ends of the probe support, and two ends of the connecting plate are sleeved on the fixing shafts.
Preferably, the fixed shaft is sleeved with a spring limited between the probe bracket and the connecting plate, and the fixed shaft is also in threaded connection with a limit nut pressing the connecting plate on the spring.
Preferably, the transmitting direction of the transmitting probe is parallel to the receiving direction of the receiving probe, and the receiving direction of the receiving probe is inclined to one side of the transmitting probe matched with the receiving probe; the transmitting probes and the receiving probes are linearly arranged on the probe bracket in a non-crossed manner, and the transmitting probes can be simultaneously used as the receiving probes.
Preferably, the flaw detection area is uniformly divided into a plurality of scanning heights with the interval h, and the relation between the number m of the receiving probes and the number n of the transmitting probes is expressed as
Wherein the int () operator represents the rounding, H2Indicating the distance between the upper boundary of the flaw detection area of the track and the bottom surface of the track, H1The distance between the lower boundary of the rail flaw detection area and the bottom surface of the rail is shown, and the height of the flaw detection area is H2-H1。
Preferably, all the probes are numbered sequentially starting from the first transmitting probe, the distance between adjacent probes is:
wherein liThe distance between the ith probe and the (i-1) th probe is shown, α the included angle of the emission path and the vertical plane is shown, wherein, α∈ [38.65 degrees, 45 degrees DEG)]、h∈[8,12]。
Preferably, the bottom of the probe bracket is straight, the positions of the two ends of the probe bracket, which are provided with the fixed shafts, protrude upwards to form an approximate U-shaped structure, the probe is fixed at the bottom of the U-shaped structure, the probe bracket is placed in a protective soft film, the protective soft film at least wraps the bottom surface of the probe bracket and two side surfaces of the probe bracket relative to the self advancing direction, a soft film fixing plate fixedly connected with the probe bracket is arranged on the side surface of the protective soft film, and a dust cover penetrating through the fixed shafts to seal the protective soft film is further arranged above the probe bracket.
The utility model provides a fixed system of probe mounting bracket, includes the probe frame with connecting plate fixed connection, the probe frame sets up on a mount, mount and flaw detection car fixed connection, the both ends of mount bottom at least are provided with a walking wheel respectively.
9. The probe mount securing system of claim 8, wherein: the mount is including dividing interior fixed plate and the outer fixed plate of arranging the track both sides in, and the fixed walking wheel optical axis that is provided with the interior, outer fixed plate of connection in the both ends of interior, outer fixed plate, the pivot both ends of walking wheel are fixed with by spacing cover and establish the otic placode on the walking wheel optical axis, and the walking wheel sets up between two otic placodes.
Preferably, one end of the inner side of the travelling wheel is provided with a side baffle which protrudes out of the wheel body and is abutted and limited with the inner side surface of the track, and a return spring which is limited between an ear plate and an inner fixing plate of the inner side of the travelling wheel is arranged on the optical axis of the travelling wheel; still be provided with the probe optical axis on the inside and outside fixed plate of two piece at least fixed connection between the inside and outside fixed plate, probe frame cover is located on the probe optical axis, a fixedly connected with reinforcing plate on the otic placode of walking wheel homonymy, be fixed with a motor on the reinforcing plate, the power end of motor with probe frame fixed connection.
Preferably, at least two pin shafts are arranged on the probe frame, and a pin shaft fixing plate matched with the pin shafts is arranged on the surface of the connecting plate.
Preferably, the inner ear plates of the two end travelling wheels are respectively provided with a pear head which is lapped on the surface of the track in a way of extending forwards and backwards in the travelling direction.
Preferably, a brush and a spray head acting on the surface of the track are also arranged between the pear head of the front travelling wheel and the inner ear plate where the pear head is positioned.
The contact type probe mounting rack and the fixing system for vertical flaw scanning provided by the invention have the advantages that: the probe bracket and the connecting plate are connected through the spring, so that the contact effect of the probe and the track is ensured; the connecting plate is hinged and fixed with the probe frame, can deflect as required to ensure good contact between the probe and the track, protects the soft film, can reduce the abrasion of the probe bracket, and is convenient to replace under the condition of self damage; by providing a return spring on the optical axis of the travelling wheel it can be ensured that the probe is always positioned at the centre of the track.
Drawings
FIG. 1 is a functional block diagram of the background art to which the present invention is applied;
FIG. 2 is a schematic view of a contact probe mount for vertical flaw scanning provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a rail vertical flaw detection system for two transmitting probes according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a four-shot orbital vertical flaw detection system according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a three-shot orbital vertical flaw detection system provided by an embodiment of the present invention;
FIG. 6 is a schematic diagram of the vertical rail flaw detection system with increased scan height of FIG. 3;
FIG. 7 is a schematic view of a mount securing system provided by an embodiment of the present invention;
FIG. 8 is a schematic view of a mount securing system provided by an embodiment of the present invention;
fig. 9 is a schematic structural view of a rectangular side frame of a flaw detection vehicle cooperating with a mounting bracket fixing system according to an embodiment of the invention.
Detailed Description
In order that the objects, technical solutions and advantages of the present invention will become more apparent, the present invention will be further described in detail with reference to the accompanying drawings in conjunction with the following specific embodiments.
As shown in fig. 2, the present embodiment provides a contact type probe mounting bracket for vertical flaw scanning, which comprises a probe bracket 01 capable of being placed on the surface of a rail (not shown) and a connecting plate 02 connecting the probe bracket 01 and a flaw detection vehicle (not shown), wherein the connecting plate 02 is fixedly connected with the probe bracket 01 along the direction vertical to the surface of the rail, and the probe bracket 01 is tightly pressed on the surface of the rail; at least three contact probes 03 are sequentially arranged on the probe bracket 01 along the movement direction of the flaw detection vehicle and comprise at least one transmitting probe or at least one receiving probe, ultrasonic waves transmitted by the transmitting probes can be received by one receiving probe after passing through vertical flaws inside the track and two mirror reflections on the bottom surface of the track, and the probes 03 on the probe bracket 01 can be matched to scan a plurality of heights in a flaw detection area.
This embodiment realizes simultaneously detecting a plurality of heights through the combination of a plurality of transmitting probe and receiving probe, after fixed through the mounting bracket, can be fixed in and follow the flaw detection car motion on the flaw detection car and realize the continuous scanning of a plurality of heights in whole flaw detection region, when specifically using, technical staff in the art can be according to the principle disclosed in applications such as CN208721616U, CN207552826U, CN206281846U mentioned in the background art, the probe arrangement mode that is shown in figure 1, how many height need be surveyed just to set up how many groups of corresponding transmitting probe and receiving probe and rationally set up the distance between every two probes of a set, can convenient realization scan a plurality of heights.
However, the method disclosed in the above application requires an excessive number of probes 03, which increases the use cost, and when the number of heights to be scanned is large, the length of the probe holder 01 also needs to be set to be long to meet the use requirement.
Referring to fig. 3, the transmitting probe and the receiving probe are both arranged on the upper surface of the track, the probes are numbered by using arabic numbers in sequence, the ultrasonic signal transmitted by the transmitting probe 1 travels along the transmitting path a and encounters a vertical flaw at a certain height D in the flaw detection area, then mirror reflection occurs, the transmitting signal travels along the transmitting path B to the bottom surface of the track and again mirror reflection occurs, the reflected signal travels along the receiving path C and is received by the corresponding receiving probe 7, and the information such as the flaw position can be confirmed by analyzing the ultrasonic signal received by the receiving probe 7, so that the unqualified track can be replaced in time; on the basis, in fig. 3, a plurality of probes including the transmitting probe 2 and the receiving probes 3-10 are arranged for the transmitting probe 1 to receive the reflected signals of the transmitting probe which meet vertical damage at different heights, and the receiving probes 3-10 are arranged for the transmitting probe 2 to receive the reflected signals of the transmitting probe which meet vertical damage at a plurality of heights which are not covered by the transmitting probe 1, so that the number of required probes 03 is reduced on the basis of ensuring that the scanning height covers the whole flaw detection area, and the length of the required probe bracket 01 can be shortened.
As can be seen from the above description, the transmitting direction of the transmitting probe is parallel to the receiving direction of the receiving probe, and the receiving direction of the receiving probe is inclined to the side of the transmitting probe matched with the receiving probe, in order to simplify the system, reduce the number of the probes 03 and the length required for arranging the probes 03, the transmitting probe and the receiving probe are linearly arranged on the probe holder 01 without crossing, and the transmitting probe can also be used as the receiving probe to receive the reflected ultrasonic signal. In fig. 3, the ultrasonic signal emitted by the transmitting probe 1 is reflected by the vertical flaw at the bottom E of the flaw detection area and then reflected by the bottom surface to be received by the transmitting probe 2, and since there is no other transmitting probe before the transmitting probe 1, that is, the transmitting probe 1 cannot receive other ultrasonic signals, the transmitting probe 1 may not have the capability of receiving signals.
In fig. 3, if there is a vertical flaw at both the height D and the height E, the ultrasonic signal emitted by the transmitting probe 1 travels along the reflection path B after being reflected by the flaw at the height D, and the flaw at the height E cannot be effectively detected. With reference to fig. 3, 4 and 5, in the preferred embodiment, the flaw detection area is divided into a plurality of scanning heights, and it can be determined by those skilled in the art through the above statements and drawings that the receiving probe is uniquely corresponding to the receiving path and the reflection path, the flaw height at which the receiving probe can receive the reflection signal is the height at which the intersection point of the reflection path corresponding to the receiving probe and each transmission path is located, and the continuous detection heights are sequentially allocated to the plurality of transmission probes, so that when a certain position is blocked by other flaws, scanning can be performed at adjacent heights by ultrasonic signals of other transmission probes, thereby reducing the missing rate and improving the detection accuracy; based on this situation, those skilled in the art will not suggest that only one transmitting probe is provided when implementing the solution of the present application, but if the height of the flaw detection area is low, or if at least two detection systems with different transmitting angles are arranged on one flaw detection vehicle, the use of one transmitting probe can also effectively detect flaws.
Based on the requirement of complete scanning of all the scanning heights, each scanning height is preferably corresponding to a receiving probe capable of receiving vertical damage reflection signals or a transmitting probe capable of serving as a receiving probe. Based on the above, those skilled in the art should understand that damage detection can be performed by setting multiple receiving probes for each height, which cooperate with different transmitting probes, and although such setting would increase the cost of the system, the missing detection caused by damage to the probes can be reduced.
Since the present embodiment expects to sequentially allocate consecutive heights to different transmitting probes, the number of damages detected on different scanning heights on the transmitting path of each transmitting probe is approximately the same, which is particularly obvious in fig. 4, the reflection paths of the receiving probes 5 and 6 are all intersected with the transmitting paths of the transmitting probes 1, 2, 3 and 4, and the reflection path corresponding to the receiving probe 7 is only intersected with the transmitting paths of the transmitting probes 2, 3 and 4, on the basis, other scanning heights are additionally added to the transmitting probe 1 through the cooperation of the transmitting probes 1 and 4, and meanwhile, in fig. 4, the additional scanning heights are added to the transmitting probe 2 through the cooperation of the transmitting probes 2 and 4, but since the transmitting probes 2, 3 and 4 can be used as receiving probes, and do not select to receive signals sent by only one transmitting probe per se, so that this scanning height, at which the transmitting probes 2 and 4 cooperate to cover, can likewise be detected by the combination of the transmitting probes 1 and 3; for the same reason, the vertical lesions marked as scan heights covered by the transmitting probes 1 and 2 in fig. 4 are also detected by the combination of the transmitting probes 2 and 3 and 4, thereby increasing the probability of detecting the bottom layer lesions in the case of the presence of lesions on the upper layer, and the number of lesion heights detectable on the transmitting path of each transmitting probe is approximately the same regardless of the positions of the repeated scans.
Referring to fig. 5, which shows a probe arrangement substantially the same as that of fig. 4, it can be determined that when the number of transmit probes and receive probes is substantially the same, the total number of probes 03 required is small and the adjacent scan height intervals of the same transmit probe are large.
Based on the technical solutions provided by the present embodiment and the exemplary probe arrangement of fig. 3-5, a person skilled in the art can make certain changes to the specific arrangement and communication combination of the probes based on the detection principle disclosed in the present application, and these changes should fall within the protection scope of the claims of the present application.
Under the condition that the flaw detection area is uniformly divided into a plurality of scanning heights at intervals of h, the number of probes on the contact type probe mounting rack provided by the embodiment satisfies the following relationship:
where m is the number of receiving probes, n is the number of transmitting probes, int () operator represents the rounding, H2Indicating the distance between the upper boundary of the flaw detection area of the track and the bottom surface of the track, H1,H1The distance between the lower boundary of the rail flaw detection area and the bottom surface of the rail is more than or equal to 0, and the height of the flaw detection area is H2-H1。
Since the transmitting path is reflected in the direction opposite to the receiving probe when directly transmitted to the bottom surface of the track, the minimum scanning height needs to be higher than the bottom surface of the track, the specific value can be determined according to the flaw detection sensitivity, the flaw size requirement and the probe parameters, a common probe distribution mode of 60 tracks is shown in fig. 3, the total depth of the 60 tracks is 176, the flaw detection area is the height of the whole track, namely H1＝0，H2176, the scanning height interval h is 10, 2 transmitting probes are selected in fig. 2, and the number of receiving probes is
All the probes are numbered sequentially starting from the first transmitting probe, and the numbering result as shown in fig. 3 is obtained, and the preferred scanning combination mode is as follows:
fig. 4 also shows a division of 60 rails, wherein the inspection area is still the height of the entire rail, and h is 12, then
The preferred combination of probes is:
fig. 5 differs from fig. 4 only in that 3 transmitting probes are used, and 4 receiving probes can be known according to the number relationship between the transmitting probes and the receiving probes, and the preferred combination relationship between the probes is as follows:
fig. 6 shows a schematic diagram of the probe layout for increasing the scanning height interval in fig. 3 to 12, where n is 2 and m is 7.
It is evident from the embodiments of fig. 3-6 that the total number of probes can be reduced as the interval of scanning height increases, and it is generally required in the art that the flat-bottom hole damage with a diameter of 4mm can be found at the lowest, and h is generally greater than or equal to 4 based on the requirement, h ∈ [8,12] in the preferred embodiment, although other data can be selected by the person skilled in the art based on the scanning requirement.
After all the probes are numbered sequentially, the distances among all the probes satisfy the following relation:
wherein liShowing the distance between the ith probe and the (i-1) th probe and α the angle of the transmit path to the vertical plane the above relationship is simply calculated from the similar triangular relationship and will not be explained in detail in this application, it will be seen that the distance between adjacent probes has a direct relationship to the angle α, and for ease of control of the appropriate mutual spacing, it is preferred to have α∈ [38.65 °,45 ° ]]. Those skilled in the art will appreciate that proper extension of the above ranges will not produce significant changes in distance and that even significant changes in distance are consistent with the detection principles provided herein.
It will be understood by those skilled in the art that the distance between the probes described herein is the distance between the transmit path of the transmitting probe and the intersection point of the receive path of the receiving probe with the rail surface or other plane parallel to the rail surface, and not necessarily the actual spatial distance between the probes, the actual position of each probe being a combination of probe type and fixed structure considerations.
It has been said in the foregoing that, when there is a concern about missing detection in single angle detection, at least two detection systems with different angles α may be disposed on the same track, so as to detect the damage at different angles, so as to prevent the bottom damage from being blocked by the upper layer, and in practice, the horizontal distance between the intersection point of the same transmission path and the upper and lower surfaces of the track is not too large, and the track is generally replaced in time when there is the damage, so that even if the lower layer damage is blocked by the upper layer damage, the lower layer damage can be replaced at the same time when replacing the track, and therefore, the requirement for detecting the defect can be satisfied by only one detection system.
Returning to fig. 2, in the present embodiment, at least one fixing shaft 011 perpendicular to the surface of the track is fixedly disposed at each of two ends of the probe holder 01 in the traveling direction, two ends of the connecting plate 02 are sleeved on the fixing shaft 011, and a limit nut 012 that limits the movement of the connecting plate 02 is screwed on the fixing shaft 011, so as to achieve the fixed connection between the probe holder 01 and the connecting plate 02, because the bottom surface of the probe holder 01 needs to be pressed on the surface of the track when in use, in the preferred embodiment, a spring 013 limited between the probe holder 01 and the connecting plate 02 is further sleeved on the fixing shaft 011, and after the limit nut 012 is fixed, the spring 013 is compressed to provide pressure for the probe holder 01, thereby ensuring that the probe holder 01 can be pressed on the surface of the track all the time even when the surface of.
The bottom of the probe bracket 01 is a long straight plate (not shown), the positions of two ends of the probe bracket 01, which are provided with the fixed shafts 011, protrude upwards to form a U-shaped structure, the probe 03 is fixed at the bottom of the U-shaped structure, the probe bracket 01 is integrally placed in a protective soft film (not shown), the protective soft film at least wraps the bottom surface of the probe bracket 01 and two side surfaces opposite to the self advancing direction, because both sides of the bottom of the probe bracket 01 provided by the embodiment are arc-shaped transition, the bottom and four side surfaces of the probe bracket are all wrapped by the protective soft film in the preferred embodiment, the side surface of the protective soft film is provided with a soft film fixing plate 014 fixedly connected with the probe bracket 01, and in order to be matched with the soft film fixing plate 014, the side surface of the probe bracket 01 can; further, a dust cover 015 which penetrates through the fixing shafts 011 at the two sides and seals the protective soft film is further arranged above the probe bracket 01.
The probe 03 is fixed on the probe bracket 01 by a fixing method in the prior art, for example, in a method of mounting an ultrasonic probe by a phased array ultrasonic wedge disclosed in chinese patent application CN106198760A (a method and a system for detecting an ultrasonic image of a rail weld based on a dual-array probe), it can be known from the distance formula between adjacent probes 03 that the distance between transmitting probes is relatively short, and in order to simplify the structure, a plurality of transmitting probes may be mounted on the same wedge or other mounting structures in the preferred embodiment.
Through fixing the probe mounting bracket that this embodiment provided at the flaw detection car or installing on the flaw detection car through other intermediate structure, can realize not the not continuous flaw detection scanning of co-altitude of track, for the purpose that realizes accurate flaw detection, can arrange corresponding processing system and come the signal time or the position that recording probe 03 received to accurate fix a position the position of damage, make things convenient for the operation personnel to change the track of damage.
Further, the embodiment further provides a fixing system for matching the probe mounting rack and the flaw detection vehicle together to work, referring to fig. 7, the fixing system comprises a probe frame 04 fixedly connected with the connecting plate 02, the probe frame 04 is arranged on a fixing frame 05, the fixing frame 05 is fixedly connected with the flaw detection vehicle, two walking wheels 06 are respectively arranged at two ends of at least the bottom of the fixing frame 05, and the walking wheels 06 can drive the probe frame 01 to work along the track when walking along the track.
Specifically, combine fig. 7 and fig. 8, mount 05 is including arranging the inner fixed plate 051 and the outer fixed plate 052 of track both sides in the branch, and the both ends of inner fixed plate 051 and outer fixed plate 052 are the fixed walking wheel optical axis 053 who is provided with connection inner fixed plate 051 and outer fixed plate 052 respectively, the pivot both ends of walking wheel 06 are fixed with respectively by spacing cover establish the otic placode 061 on walking wheel optical axis 053, the walking wheel 06 sets up between two otic placodes 061, the inboard one end of walking wheel 06 has outstanding in the wheel body and with the spacing side shield 062 of track medial surface butt, the cover is equipped with reset spring 054 between otic placode 061 and the inner fixed plate 051 of being restricted in walking wheel 06 inboard on walking wheel optical axis 053.
The fixed frame 05 is also provided with a probe optical axis 056 fixedly connected with an inner fixed plate 051 and an outer fixed plate 052, the probe frame 04 is sleeved on the probe optical axis 056 and is freely matched with the probe optical axis 056 along the axial direction, ear plates 061 on the same side of the two walking wheels 06 are fixedly connected with a reinforcing plate 063, a motor 07 is fixed on the reinforcing plate 063, a power end (not shown) of the motor 07 is fixedly connected with the probe frame 04, and under the condition that the position of the walking wheels 06 placed on the track is determined, the position of the probe 03 on the track can be adjusted by adjusting the extending length of the power end of the motor 07, so that the probe 03 is positioned at the center of the track as much as possible; when passing through a curve or other places which can change the distance of the track, the travelling wheels 06 can be pressed against the side wall of the track under the action of the return springs 054, so that the probe 03 is kept at the center of the track.
The probe frame 04 is at least provided with two pin shafts 041, the upper surface of the connecting plate 02 is provided with a pin shaft fixing plate 021 which is respectively matched with each pin shaft 041, so that the connecting plate 02 is fixedly connected with the probe frame 04, the axial direction of each pin shaft 041 is parallel to the movement direction, and when the probe passes through a track with height difference at two sides, the connecting plate 02 can deflect relative to the probe frame 04 to adapt to the inclination of the surface of the track, so that the bottom surface of the probe support 01 is ensured to be in good contact with the surface of the track.
The ear plates 061 on the inner sides of the walking wheels 06 at the two ends respectively extend forwards and backwards along the walking direction to form pear heads 064 lapped on the surface of the rail, when the walking wheels 06 pass through a fork and the like, the whole fixing frame 05 can be supported across the fork through the pear heads 064 at the front and the rear, the passing performance is improved, based on the above functions, when the walking wheels 06 walk on the rail, the pear heads 064 can have a gap with the surface of the rail, so that the abrasion is reduced, the specific shape of the pear heads 064 is not strictly limited, and only stable supporting force can be provided when the pear heads are in contact with the rail. Further, a brush 065 and a spray head 066 which are positioned in front of the traveling wheels 06 and act on the surface of the track are fixed on an ear plate 061 of the front traveling wheel 06, the track is cleaned, friction between a soft protective film and the surface of the track is reduced, and when the water tank is used, the water tank is placed on a flaw detection vehicle and is connected with the spray head 066 through a pipeline.
In order to further improve the stability of the fixing frame 05, an appropriate number of reinforcing rods 057 connecting the inner fixing plate 051 and the outer fixing plate 052 can be arranged on the fixing frame 05 in the preferred embodiment; the top end of the inner fixing plate 051 is also fixedly provided with at least two connecting blocks 058 which are fixedly matched with the flaw detection vehicle; for the flaw detection vehicle with the rectangular side frame 0583 shown in fig. 9, the connection block 058 provided in this embodiment includes a buckle 0581 fixedly connected to the top end of the inner fixing plate 051 and overhanging outside the fixing frame 05, and a clamp plate 0582 fixed below the buckle 0581 and parallel to the inner fixing plate 051, the connection block 058 is clamped on the rectangular side frame 0583 of the flaw detection vehicle, so that the clamp plate 0582 and the inner fixing plate 051 are respectively matched with two side faces of the rectangular side frame 0583, and the matching between the fixing frame 05 and the flaw detection vehicle can be conveniently realized, and in order to prevent the relative sliding between the fixing frame 05 and the flaw detection vehicle, a containing hole 0584 for containing the clamp plate 0582 can be provided on the rectangular side frame 0583 thereof.
Claims (11)
1. The utility model provides a contact probe mounting bracket for perpendicular injury scanning is examined which characterized in that: the flaw detection device comprises a probe bracket capable of being placed on the surface of a track and a connecting plate for connecting the probe bracket and a flaw detection vehicle, wherein the connecting plate is fixedly connected with the probe bracket along the direction vertical to the surface of the track, and the probe bracket is tightly pressed on the surface of the track;
the probe bracket is provided with at least three contact probes arranged along the moving direction of the flaw detection vehicle, wherein the at least three contact probes comprise at least one transmitting probe or at least one receiving probe; ultrasonic waves sent by the transmitting probe can be received by one receiving probe after being subjected to vertical damage inside the rail and two-time mirror reflection on the bottom surface of the rail, and a plurality of probes on the probe support can be matched to scan vertical damage at a plurality of heights in a flaw detection area.
2. A contact probe mount for vertical flaw scanning according to claim 1 wherein: two ends of the probe bracket are respectively fixedly provided with at least one fixed shaft vertical to the surface of the track, and two ends of the connecting plate are sleeved on the fixed shafts; the fixed shaft is sleeved with a spring limited between the probe bracket and the connecting plate, and the fixed shaft is also in threaded connection with a limit nut pressing the connecting plate on the spring.
3. A contact probe mount for vertical flaw scanning according to claim 1 wherein: the transmitting direction of the transmitting probe is parallel to the receiving direction of the receiving probe, and the receiving direction of the receiving probe is inclined towards one side of the transmitting probe matched with the receiving probe; the transmitting probes and the receiving probes are linearly arranged on the probe bracket in a non-crossed manner, and the transmitting probes can be simultaneously used as the receiving probes.
4. A contact probe mount for vertical flaw scanning according to claim 3 wherein: the flaw detection area is uniformly divided into a plurality of scanning heights with the interval of h, and the relation between the number m of the receiving probes and the number n of the transmitting probes is expressed as
Wherein the int () operator represents the rounding, H2Indicating the distance between the upper boundary of the flaw detection area of the track and the bottom surface of the track, H1The distance between the lower boundary of the rail flaw detection area and the bottom surface of the rail is shown, and the height of the flaw detection area is H2-H1。
5. A contact probe mount for vertical lesion scanning according to claim 4, wherein: numbering all probes in sequence starting from the first transmitting probe, the distance between adjacent probes is:
wherein liThe distance between the ith probe and the (i-1) th probe is shown, α the included angle of the emission path and the vertical plane is shown, wherein, α∈ [38.65 degrees, 45 degrees DEG)]、h∈[8,12]。
6. A contact probe mount for vertical flaw scanning according to claim 2, wherein: the probe support is flat in bottom, the positions of two ends of the probe support, which are provided with the fixed shafts, protrude upwards to form an approximate U-shaped structure, the probes are fixed at the bottom of the U-shaped structure, the probe support is placed in a protective soft film, the protective soft film at least wraps the bottom surface of the probe support and two side surfaces of the probe support relative to the advancing direction of the probe support, a soft film fixing plate fixedly connected with the probe support is arranged on the side surface of the protective soft film, and a dust cover penetrating through the fixed shafts to seal the protective soft film is further arranged above the probe support.
7. A probe mount fixing system according to any one of claims 1 to 6, wherein: the flaw detection device comprises a probe frame fixedly connected with a connecting plate, wherein the probe frame is arranged on a fixed frame, the fixed frame is fixedly connected with a flaw detection vehicle, and two traveling wheels are respectively arranged at two ends of at least the bottom of the fixed frame.
8. The probe mount securing system of claim 7, wherein: the mount is including dividing interior fixed plate and the outer fixed plate of arranging the track both sides in, and the fixed walking wheel optical axis that is provided with the interior, outer fixed plate of connection in the both ends of interior, outer fixed plate, the pivot both ends of walking wheel are fixed with by spacing cover and establish the otic placode on the walking wheel optical axis, and the walking wheel sets up between two otic placodes.
9. The probe mount securing system of claim 8, wherein: one end of the inner side of the travelling wheel is provided with a side baffle which protrudes out of the wheel body and is abutted and limited with the inner side surface of the track, and a return spring which is limited between an ear plate and an inner fixing plate on the inner side of the travelling wheel is arranged on the optical axis of the travelling wheel; still be provided with the probe optical axis on the inside and outside fixed plate of two piece at least fixed connection between the inside and outside fixed plate, probe frame cover is located on the probe optical axis, a fixedly connected with reinforcing plate on the otic placode of walking wheel homonymy, be fixed with a motor on the reinforcing plate, the power end of motor with probe frame fixed connection.
10. A probe mount securement system as in claim 9, wherein: the probe frame is at least provided with two pin shafts, the surface of the connecting plate is provided with a pin shaft fixing plate matched with the pin shafts, and the axial directions of the pin shafts are parallel to the advancing direction of the travelling wheels.
11. A probe mount securement system as in claim 9, wherein: the inner ear plates of the travelling wheels at the two ends are respectively provided with pear heads which can be lapped on the surface of the track in a front-back extending way in the travelling direction; a brush and a spray head which act on the surface of the track are arranged between the pear head of the front travelling wheel and the inner side ear plate where the pear head is positioned.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019111813643 | 2019-11-27 | ||
| CN201911181364.3A CN111024812A (en) | 2019-11-27 | 2019-11-27 | Contact type probe mounting rack and fixing system for vertical flaw scanning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111426753A true CN111426753A (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911181364.3A Withdrawn CN111024812A (en) | 2019-11-27 | 2019-11-27 | Contact type probe mounting rack and fixing system for vertical flaw scanning |
| CN202010379573.5A Pending CN111426753A (en) | 2019-11-27 | 2020-05-08 | Contact type probe mounting rack and fixing system for vertical flaw scanning |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911181364.3A Withdrawn CN111024812A (en) | 2019-11-27 | 2019-11-27 | Contact type probe mounting rack and fixing system for vertical flaw scanning |
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| CN (2) | CN111024812A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3835785A (en) * | 1973-11-26 | 1974-09-17 | Goodyear Tire & Rubber | Switching apparatus for transportation system |
| CN102490763A (en) * | 2011-12-27 | 2012-06-13 | 合肥超科电子有限公司 | Barrier-free turnout passing wheel type probe bracket applied to portable steel rail flaw detecting vehicle |
| CN206114598U (en) * | 2016-11-01 | 2017-04-19 | 合肥超科电子有限公司 | Rail -defect detector car wheel type probe support |
| CN107458419A (en) * | 2017-09-18 | 2017-12-12 | 四川曜诚无损检测技术有限公司 | A kind of rail mother metal flange of rail ultrasonic flaw detecting device |
| CN109521097A (en) * | 2018-12-29 | 2019-03-26 | 天津精益铁安机电技术有限公司 | A kind of wheel seach unit follower for double rail type steel rail ultrasonic flaw detecting instrument |
| CN209247700U (en) * | 2018-12-25 | 2019-08-13 | 邢台先锋超声电子有限公司 | Rail integrates defectoscope |
| CN212159676U (en) * | 2019-11-27 | 2020-12-15 | 合肥超科电子有限公司 | Contact type probe mounting rack and fixing system for vertical flaw scanning |
-
2019
- 2019-11-27 CN CN201911181364.3A patent/CN111024812A/en not_active Withdrawn
-
2020
- 2020-05-08 CN CN202010379573.5A patent/CN111426753A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3835785A (en) * | 1973-11-26 | 1974-09-17 | Goodyear Tire & Rubber | Switching apparatus for transportation system |
| CN102490763A (en) * | 2011-12-27 | 2012-06-13 | 合肥超科电子有限公司 | Barrier-free turnout passing wheel type probe bracket applied to portable steel rail flaw detecting vehicle |
| CN206114598U (en) * | 2016-11-01 | 2017-04-19 | 合肥超科电子有限公司 | Rail -defect detector car wheel type probe support |
| CN107458419A (en) * | 2017-09-18 | 2017-12-12 | 四川曜诚无损检测技术有限公司 | A kind of rail mother metal flange of rail ultrasonic flaw detecting device |
| CN209247700U (en) * | 2018-12-25 | 2019-08-13 | 邢台先锋超声电子有限公司 | Rail integrates defectoscope |
| CN109521097A (en) * | 2018-12-29 | 2019-03-26 | 天津精益铁安机电技术有限公司 | A kind of wheel seach unit follower for double rail type steel rail ultrasonic flaw detecting instrument |
| CN212159676U (en) * | 2019-11-27 | 2020-12-15 | 合肥超科电子有限公司 | Contact type probe mounting rack and fixing system for vertical flaw scanning |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111024812A (en) | 2020-04-17 |
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