Test block for detecting static sensitivity and signal-to-noise ratio of steel rail wheel type ultrasonic flaw detector

Abstract

The utility model discloses a test block for detecting the static sensitivity and the signal-to-noise ratio of a steel rail wheel type ultrasonic flaw detector, which comprises a steel rail type test block, the bottom surface of the rail bottom of the steel rail type test block is used for detecting the static sensitivity and the signal-to-noise ratio of a 0-degree probe of a steel rail detection wheel, and a first rail waist hole and a second rail waist hole are symmetrically formed in the rail waist; a first rectangular notch groove and a second rectangular notch groove which are used for detecting the static sensitivity and the signal-to-noise ratio of the 37-degree probe are respectively formed in two sides of the first rail waist hole and the second rail waist hole; and a flat-bottom hole group which is used for detecting the static sensitivity and the signal-to-noise ratio of the 70-degree probe is formed in the top of the rail head. According to the utility model, reflected waves of the 0-degree probe, the + / -37-degree probe, the left-70-degree probe, the right + 70-degree probe, the right-70-degree probe and the left + 70-degree probe can be simultaneously obtained, and after the detection wheel rotates at an inclination angle a, the flaw detector can simultaneously obtain the reflected waves of the + / -70-degree probe, so that the detection efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to ultrasonic flaw detector static sensitivity and signal to noise ratio detection technical field, concretely relates to a kind of test block for static sensitivity and signal to noise ratio detection of steel rail wheel type ultrasonic flaw detector. BACKGROUND

[0002] The working performance of steel rail wheel type ultrasonic flaw detector refers to the working performance of ultrasonic flaw detection system tested under the condition of detection site by steel rail wheel type ultrasonic flaw detector.The ultrasonic detection system refers to the equipment used in actual detection work, including flaw detector, wheel type probe and high-frequency cable connected with them.The nondestructive testing of metal material workpiece is the detection of workpiece interior and its surface without destroying and changing the physical and chemical state of workpiece, and is widely applied in nuclear industry, aerospace, metallurgy, machinery, electric power, special equipment, petroleum chemical industry, railway, weapon, ship, coal, non-ferrous metal, building, medicine and other fields.The conventional nondestructive testing includes ultrasonic detection, ray detection, magnetic powder detection, penetration detection and eddy current detection.The ultrasonic detection of metal material is the most widely used, highest frequency and fastest developed nondestructive testing method at present, and is important means for product manufacturing quality control, product performance testing, process improvement, equipment maintenance, in-service detection and quality identification.

[0003] At present, double-track ultrasonic detection equipment is used in China to detect double-track of railway, and the double-track ultrasonic detection equipment is composed of ultrasonic detector, wheel type probe, cable, track car, coupling agent tank, centering system, electromechanical system, system software and devices connected with detector during detection, wherein, the wheel type probe of two wheels comprises nine probes (5), and the nine probes (5) in the wheel type probe are respectively: one 0° probe; one each of front 37° (or +37°) probe and rear 37° (or -37°) probe, one each of front 70° (or +70°) probe, front left oblique 70° (or left +70°) probe and front right oblique 70° (or right +70°) probe, one each of rear 70° (or -70°) probe, rear left oblique 70° (or left -70°) probe and rear right oblique 70° (or right -70°) probe, and the oblique 70° inclination angle a is generally 20°, the nine probes are arranged in the mode of Figure 5 , and are installed on fixed curved surface in flexible tire filled with coupling liquid, and the wheel type probe flexible tire rolls on rail head of steel rail when the double-track flaw detection car performs ultrasonic detection on steel rail, and the nine probes translate with the double-track flaw detection car without rotating with the tire, and the nine probes emit ultrasonic wave and receive defect reflection wave through rail head, rail waist and rail bottom of steel rail.In steel rail wheel type ultrasonic flaw detector, static detection sensitivity and signal to noise ratio are important indexes reflecting comprehensive performance of flaw detector, and directly affect the detection ability of defects in steel rail, and at present, there is no efficient detection means for static sensitivity and signal to noise ratio detection of steel rail wheel type probe. UTILITY MODEL CONTENT

[0004] The utility model wants to solve the technical problem in prior art, provide a kind of test block for static sensitivity and signal-to-noise ratio detection of rail wheel type ultrasonic flaw detector, it is novel and reasonable in design, simple structure, the reflection wave of 0 ° probe, ±37 ° probe, left-70 ° probe, right+70 ° probe, right-70 ° probe and left+70 ° probe 7 probes can be obtained simultaneously, after the rotation inclination angle a of probe wheel, the reflection wave of ±70 ° probe can be obtained simultaneously by flaw detector, detection efficiency is high, practicality is strong, it is convenient to use.

[0005] To solve the above technical problems, the utility model adopts the technical scheme: the test block for static sensitivity and signal-to-noise ratio detection of rail wheel type ultrasonic flaw detector, characterized by: including rail type test block, the rail type test block includes rail bottom, rail waist and rail head, the bottom surface of rail bottom is used to detect the static sensitivity and signal-to-noise ratio of 0 ° probe of rail probe wheel, the height of rail type test block is 176mm, two rail waist holes are symmetrically set on rail waist, and the two rail waist holes are a first rail waist hole and a second rail waist hole;The central axis of the first rail waist hole and the center line of the top width direction of the block form a first plane, the central axis of the second rail waist hole and the center line of the top width direction of the block form a second plane, the included angle between the first plane and the second plane is 74 °, the distance between the central axis of the first rail waist hole and the second rail waist hole and the top surface is 97mm, a first rectangular notch for detecting the static sensitivity and signal-to-noise ratio of a 37 ° probe is set on the upper side wall of the first rail waist hole away from the second rail waist hole, a second rectangular notch for detecting the static sensitivity and signal-to-noise ratio of another 37 ° probe is set at the symmetrical position of the second rail waist hole and the first rail waist hole, the central plane of the first rectangular notch passes through the central axis of the first rail waist hole, and the included angle between the central plane of the first rectangular notch and the horizontal plane is 37 °;A flat bottom hole group for detecting the static sensitivity and signal-to-noise ratio of 70 ° probe is arranged on the top of rail head.

[0006] The test block for static sensitivity and signal-to-noise ratio detection of rail wheel type ultrasonic flaw detector, characterized in that: the width of the rail bottom is 150mm, and the length of the rail bottom is 340mm.

[0007] The test block for static sensitivity and signal-to-noise ratio detection of rail wheel type ultrasonic flaw detector, characterized in that: the diameter of the rail waist hole is 31mm;The first rectangular notch is a through slot penetrating the rail waist, the width of the first rectangular notch is 0.3mm, and the depth of the first rectangular notch is 3mm.

[0008] The rail wheel type ultrasonic flaw detector static sensitivity and signal-to-noise ratio detection test block, characterized in that: the group of flat bottom holes comprises a first flat bottom hole, a second flat bottom hole symmetrically arranged with the first flat bottom hole in the rail head width direction, a third flat bottom hole symmetrically arranged with the first flat bottom hole in the rail head length direction, and a fourth flat bottom hole symmetrically arranged with the third flat bottom hole in the rail head width direction.

[0009] The rail wheel type ultrasonic flaw detector static sensitivity and signal-to-noise ratio detection test block, characterized in that: the diameter of the first flat bottom hole is 4mm, the depth of the first flat bottom hole is 20mm, and the included angle between the central axis of the first flat bottom hole and the top surface is 26°.

[0010] The rail wheel type ultrasonic flaw detector static sensitivity and signal-to-noise ratio detection test block, characterized in that: the distance between the central axis of the first flat bottom hole and the central axis of the second flat bottom hole is 48mm, and the distance between the first flat bottom hole and the third flat bottom hole is 265mm.

[0011] The rail wheel type ultrasonic flaw detector static sensitivity and signal-to-noise ratio detection test block, characterized in that: the diameter of the first flat bottom hole is 4mm, the depth of the first flat bottom hole is 20mm, and the included angle between the central axis of the first flat bottom hole and the top surface is 26°.

[0012] The technical scheme of the utility model will be further described in detail below with the help of the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the use state diagram of the utility model.

[0014] Figure 2 It is the sectional structure schematic view of the test block of the utility model.

[0015] Figure 3 It is the front view of the test block of the utility model.

[0016] Figure 4 It is the plan view of the test block of the utility model.

[0017] Figure 5 It is the arrangement drawing of nine probes of the utility model.

[0018] Mark explanation:

[0019] 1 - rail bottom; 2 - rail waist; 3 - rail head;

[0020] 4 - rail probe wheel; 5 - probe; 6 - rail waist hole;

[0021] 6-1—first rail waist hole; 6-2—second rail waist hole; 7—flat bottom hole group;

[0022] 7-1—first flat bottom hole; 7-2—second flat bottom hole; 7-3—third flat bottom hole;

[0023] 7-4—fourth flat bottom hole; 8-1—first rectangular notch; 8-2—second rectangular notch. DETAILED DESCRIPTION

[0024] As Figures 1 to 5 shown, the utility model includes steel rail type test block, the steel rail type test block includes rail bottom 1, rail waist 2 and rail head 3, the bottom surface of rail bottom 1 is used for detecting the static sensitivity and signal-to-noise ratio of 0 ° probe of steel rail probe wheel 4, the height of steel rail type test block is 176mm, two rail waist holes 6 are symmetrically set up on rail waist 2, and two rail waist holes 6 are first rail waist hole 6-1 and second rail waist hole 6-2 respectively, the central axis of first rail waist hole 6-1 forms first plane with the center line of the width direction of the top of the block, the central axis of second rail waist hole 6-2 forms second plane with the center line of the width direction of the top of the block, the included angle between first plane and second plane is 74 °, and the distance between the central axis of first rail waist hole 6-1 and second rail waist hole 6-2 and the top surface is all 97mm, a first rectangular notch 8-1 for detecting the static sensitivity and signal-to-noise ratio of one 37 ° probe is set up on the upper portion of the side wall of first rail waist hole 6-1 away from second rail waist hole 6-2, a second rectangular notch 8-2 for detecting the static sensitivity and signal-to-noise ratio of another 37 ° probe is set up at the symmetrical position of second rail waist hole 6-2 and first rail waist hole 6-1, the central plane of first rectangular notch 8-1 passes through the central axis of first rail waist hole 6-1, and the included angle between the central plane of first rectangular notch 8-1 and the horizontal plane is 37 °, the top of rail head 3 is provided with flat bottom hole group 7 for detecting the static sensitivity and signal-to-noise ratio of 70 ° probe.

[0025] As Figure 1 and Figure 5 shown, 9 probes 5 are 0 ° probe, front 37 ° probe, rear 37 ° probe, front 70 ° probe, rear 70 ° probe, front left oblique 70 ° probe, front right oblique 70 ° probe, rear left oblique 70 ° probe and rear right oblique 70 ° probe respectively.

[0026] In the embodiment, the width of rail bottom 1 is 150mm, and the length of rail bottom 1 is 340mm.

[0027] In the embodiment, the diameter of rail waist hole 6 is 31mm, first rectangular notch 8-1 is a through slot penetrating rail waist 2, the width of first rectangular notch 8-1 is 0.3mm, and the depth of first rectangular notch 8-1 is 3mm.

[0028] In the embodiment, the flat-bottom hole group 7 includes a first flat-bottom hole 7-1, a second flat-bottom hole 7-2 symmetrically arranged with the first flat-bottom hole 7-1 in the rail head 3 width direction, a third flat-bottom hole 7-3 symmetrically arranged with the first flat-bottom hole 7-1 in the rail head 3 length direction, and a fourth flat-bottom hole 7-4 symmetrically arranged with the third flat-bottom hole 7-3 in the rail head 3 width direction.

[0029] In the embodiment, the diameter of the first flat-bottom hole 7-1 is 4 mm, the depth of the first flat-bottom hole 7-1 is 20 mm, and the angle between the central axis of the first flat-bottom hole 7-1 and the top surface is 26°.

[0030] In the embodiment, the distance between the central axis of the first flat-bottom hole 7-1 and the central axis of the second flat-bottom hole 7-2 is 48 mm, and the distance between the first flat-bottom hole 7-1 and the third flat-bottom hole 7-3 is 265 mm.

[0031] In use, the probe wheel is moved to be parallel to the center position of the test block, the static sensitivity and signal-to-noise ratio of the 0° probe of the rail probe wheel are detected by using the bottom surface of the rail bottom, the static sensitivity and signal-to-noise ratio of the +37° probe in the probe wheel are detected by using the second rectangular groove 8-2, the static sensitivity and signal-to-noise ratio of the -37° probe in the probe wheel are detected by using the first rectangular groove 8-1, the static sensitivity and signal-to-noise ratio of the left +70° probe are detected by using the fourth flat-bottom hole 7-4, the static sensitivity and signal-to-noise ratio of the right +70° probe are detected by using the third flat-bottom hole 7-3, the static sensitivity and signal-to-noise ratio of the left -70° probe are detected by using the second flat-bottom hole 7-2, and the static sensitivity and signal-to-noise ratio of the right -70° probe are detected by using the first flat-bottom hole 7-1.

[0032] The rail probe wheel 4 is rotated by an angle a to the left, the static sensitivity and signal-to-noise ratio of the +70° probe are detected by using the fourth flat-bottom hole 7-4, and the static sensitivity and signal-to-noise ratio of the -70° probe are detected by using the first flat-bottom hole 7-1, or the rail probe wheel 4 is rotated by an angle a to the right, the static sensitivity and signal-to-noise ratio of the +70° probe are detected by using the third flat-bottom hole 7-3, and the static sensitivity and signal-to-noise ratio of the -70° probe are detected by using the second flat-bottom hole 7-2.

[0033] The reflected waves of the 0° probe, ±37° probe, left -70° probe, right +70° probe, right -70° probe, and left +70° probe can be obtained at the same time, and the reflected waves of the ±70° probe can be obtained by the flaw detector after the probe wheel is rotated by an angle a, so that the detection efficiency is high.

[0034] The above is only a preferred embodiment of the utility model, and does not limit the utility model, and any simple modification, change, and equivalent structure change according to the technical essence of the utility model are still within the protection scope of the utility model technical scheme.

Claims

1. A test block for the static sensitivity and signal-to-noise ratio detection of a wheel-type rail ultrasonic flaw detector, characterized in that: The steel rail type test block comprises a rail bottom (1), a rail waist (2) and a rail head (3), the bottom surface of the rail bottom (1) is used for detecting the static sensitivity and signal-to-noise ratio of a 0° probe of a rail probe (4), the height of the steel rail type test block is 176 mm, two rail waist holes (6) are symmetrically arranged on the rail waist (2), and the two rail waist holes (6) are respectively a first rail waist hole (6-1) and a second rail waist hole (6-2); the central axis of the first rail waist hole (6-1) and the center line of the top width direction of the block form a first plane, the central axis of the second rail waist hole (6-2) and the center line of the top width direction of the block form a second plane, the included angle between the first plane and the second plane is 74°, the distance between the central axes of the first rail waist hole (6-1) and the second rail waist hole (6-2) and the top surface is 97 mm, a first rectangular notch (8-1) for detecting the static sensitivity and signal-to-noise ratio of a 37° probe is arranged on the upper side wall of the first rail waist hole (6-1) away from the second rail waist hole (6-2), a second rectangular notch (8-2) for detecting the static sensitivity and signal-to-noise ratio of another 37° probe is arranged at the symmetrical position of the first rail waist hole (6-1) and the second rail waist hole (6-2), the central plane of the first rectangular notch (8-1) passes through the central axis of the first rail waist hole (6-1), and the included angle between the central plane of the first rectangular notch (8-1) and the horizontal plane is 37°; a flat hole group (7) for detecting the static sensitivity and signal-to-noise ratio of a 70° probe is arranged on the top of the rail head (3).

2. A block for static sensitivity and signal-to-noise ratio testing of a rail wheel-type ultrasonic rail flaw detector according to claim 1, characterised in that: The width of the rail bottom (1) is 150 mm, and the length of the rail bottom (1) is 340 mm.

3. The block for static sensitivity and signal-to-noise ratio testing of a rail wheel-type ultrasonic rail flaw detector according to claim 1, characterized in that: The diameter of the rail waist hole (6) is 31 mm; the first rectangular notch (8-1) is a through notch penetrating through the rail waist (2), the width of the first rectangular notch (8-1) is 0.3 mm, and the depth of the first rectangular notch (8-1) is 3 mm.

4. The block for static sensitivity and signal-to-noise ratio testing of a rail wheel-type ultrasonic rail flaw detector according to claim 1, characterized in that: The flat hole group (7) comprises a first flat hole (7-1), a second flat hole (7-2) symmetrically arranged with the first flat hole (7-1) in the width direction of the rail head (3), a third flat hole (7-3) symmetrically arranged with the first flat hole (7-1) in the length direction of the rail head (3), and a fourth flat hole (7-4) symmetrically arranged with the third flat hole (7-3) in the width direction of the rail head (3).

5. A block for static sensitivity and signal-to-noise ratio testing of a rail wheel-type ultrasonic rail flaw detector according to claim 4, characterized in that: The diameter of the first flat hole (7-1) is 4 mm, the depth of the first flat hole (7-1) is 20 mm, and the included angle between the central axis of the first flat hole (7-1) and the top surface is 26°.

6. The block for static sensitivity and signal-to-noise ratio testing of a rail wheel-type ultrasonic rail flaw detector according to claim 4, characterized in that: The distance between the central axis of the first flat hole (7-1) and the central axis of the second flat hole (7-2) is 48 mm, and the distance between the first flat hole (7-1) and the third flat hole (7-3) is 265 mm.

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