Special test block for detecting echo frequency of steel rail wheel type probe

Abstract

The utility model discloses a special test block for detecting the echo frequency of a steel rail wheel type probe, which comprises an upright post with a cuboid structure and semi-cylinders arranged at the upper part of the upright post, the semi-cylinders are symmetrically arranged at the upper part of the upright post, and the rectangular outer surfaces of the semi-cylinders face upwards and are coplanar with the upper surface of the upright post; two semicircular outer surfaces of the semi-cylinder are parallel to a group of opposite vertical outer surfaces of the stand column, the length and the width of the stand column are equal, the length of the stand column is smaller than the height of the stand column, the height of the stand column is larger than the diameter of the semicircular section of the semi-cylinder, the thickness of the semi-cylinder is smaller than the length of the stand column, and a flat-bottom hole is formed in the center of the bottom of the stand column. The diameter of the semicircular section of the semi-cylinder is larger than that of the steel rail detection wheel. The semi-cylinder is processed and manufactured on the upper portion of the stand column, the rectangular outer surface of the semi-cylinder faces upwards and is coplanar with the upper surface of the stand column, the stand column and the semi-cylinder are processed and manufactured into a whole, detection of nine probes can be completed through one test block, the use effect is good, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rail wheel probe testing blocks, and in particular relates to a special testing block for rail wheel probe echo frequency detection. Background Art

[0002] At present, my country adopts double-track ultrasonic detection equipment to detect the double tracks of railway at the same time. The double-track ultrasonic detection equipment is composed of an ultrasonic detector, a wheel probe, a cable, a rail car, a coupling agent box, a centering system, an electromechanical system, system software and a device connected to the detector during detection. Among them, the wheel probes of the two wheels each contain 9 probes (5). The 9 probes (5) in the wheel probe are: 1 0° probe; one each of the front 37° (+37°) and the rear 37° (-37°); one each of the front 70° (+70°), the front left oblique 70° (left +70°), and the front right oblique 70° (right +70°); one each of the rear 70° (-70°), the rear left oblique 70° (left -70°), and the rear right oblique 70° (right -70°). The oblique 70° inclination angle a is generally 20°. The 9 probes are arranged according to Figure 5 Arranged in a manner, mounted on a fixed curved surface in a flexible tire filled with coupling fluid, see Figure 4 At present, the echo frequency detection test blocks of rail wheel probes all use independent test blocks. One test block can only detect one probe. Probes at different angles need to be equipped with test blocks of different styles, which is inefficient and inconvenient for rail wheel probe echo frequency detection. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a special test block for detecting the echo frequency of a rail wheel probe in view of the deficiencies in the above-mentioned prior art. The utility model has a novel and reasonable design and a simple structure. A semi-cylinder is manufactured on the upper part of a column. The semi-cylinder is symmetrically arranged on the upper part of the column. The rectangular outer surface of the semi-cylinder faces upward and is coplanar with the upper surface of the column. The column and the semi-cylinder are manufactured as one body, so that one test block can complete the detection of 9 probes. The utility model has a good use effect, improves the detection efficiency, has strong practicability, and is easy to promote and use.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a special test block for detecting the echo frequency of a rail wheel probe, characterized in that: it includes a column with a rectangular structure and a semi-cylinder arranged on the upper part of the column, the semi-cylinder is symmetrically arranged on the upper part of the column, the rectangular outer surface of the semi-cylinder faces upward and is coplanar with the upper surface of the column, the two semi-circular outer surfaces of the semi-cylinder are arranged in parallel with a group of vertical outer surfaces opposite to the column, the length and width of the column are equal, and the length of the column is smaller than the height of the column, the height of the column is larger than the diameter of the semi-circular cross-section of the semi-cylinder, the thickness of the semi-cylinder is smaller than the length of the column, a flat-bottom hole is arranged at the bottom center of the column, and the diameter of the semi-circular cross-section of the semi-cylinder is larger than the diameter of the rail probe wheel.

[0005] The above-mentioned special test block for rail wheel probe echo frequency detection is characterized in that the height of the column is 225 mm, the length and width of the column are both 80 mm, the diameter of the flat bottom hole is 2 mm, and the height of the flat bottom hole is 25 mm.

[0006] The above-mentioned special test block for rail wheel probe echo frequency detection is characterized in that the diameter of the semi-circular cross-section of the semi-cylinder is 200 mm, and the thickness of the semi-cylinder is 40 mm.

[0007] The above-mentioned special test block for rail wheel probe echo frequency detection is characterized in that the column and the semi-cylinder are processed and manufactured as one body, and the special test block in which the column and the semi-cylinder are processed and manufactured as one body is a special test block made of No. 20 low-carbon steel.

[0008] The above-mentioned special test block for rail wheel probe echo frequency detection is characterized in that the grain size of the special test block made by processing the column and the semi-cylinder into one body is 7 to 8 levels.

[0009] The beneficial effects of the utility model are that the design is novel and reasonable. A semi-cylinder is manufactured on the upper part of the column. The semi-cylinder is symmetrically arranged on the upper part of the column. The rectangular outer surface of the semi-cylinder faces upward and is coplanar with the upper surface of the column. The column and the semi-cylinder are manufactured as one body, so that one test block can complete the detection of 9 probes. The use effect is good, the detection efficiency is improved, and it is easy to promote and use.

[0010] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional diagram of the utility model.

[0012] Figure 2 It is a front view of the utility model.

[0013] Figure 3 for Figure 2 Right view of .

[0014] Figure 4 This is a usage state diagram of the utility model.

[0015] Figure 5 This is the arrangement diagram of the nine probes of the utility model.

[0016] Description of reference numerals:

[0017] 1—column; 2—semi-cylinder; 3—flat bottom hole;

[0018] 4—Rail detection wheel; 5—Probe. DETAILED DESCRIPTION

[0019] like Figures 1 to 5 As shown, the utility model includes a column 1 of a rectangular structure and a semi-cylinder 2 arranged on the upper part of the column 1, the semi-cylinder 2 is symmetrically arranged on the upper part of the column 1, the rectangular outer surface of the semi-cylinder 2 faces upward and is coplanar with the upper surface of the column 1, the two semi-circular outer surfaces of the semi-cylinder 2 are arranged in parallel with a group of vertical outer surfaces opposite to the column 1, the length and width of the column 1 are equal, and the length of the column 1 is smaller than the height of the column 1, the height of the column 1 is larger than the diameter of the semi-circular cross-section of the semi-cylinder 2, the thickness of the semi-cylinder 2 is smaller than the length of the column 1, a flat-bottom hole 3 is arranged at the bottom center of the column 1, and the diameter of the semi-circular cross-section of the semi-cylinder 2 is larger than the diameter of the rail detection wheel 4.

[0020] It should be noted that a semi-cylinder is manufactured on the upper part of the column. The semi-cylinder is symmetrically arranged on the upper part of the column. The rectangular outer surface of the semi-cylinder faces upward and is coplanar with the upper surface of the column. The column and the semi-cylinder are manufactured as one body, so that one test block can complete the detection of 9 probes, which has a good use effect and improves the detection efficiency.

[0021] In this embodiment, the height of the column 1 is 225 mm, the length and width of the column 1 are both 80 mm, the diameter of the flat bottom hole 3 is 2 mm, and the height of the flat bottom hole 3 is 25 mm.

[0022] In this embodiment, the diameter of the semicircular cross section of the semi-cylinder 2 is 200 mm, and the thickness of the semi-cylinder 2 is 40 mm.

[0023] In this embodiment, the column 1 and the semi-cylinder 2 are processed and manufactured as an integral body, and the special test block in which the column 1 and the semi-cylinder 2 are processed and manufactured as an integral body is a special test block of No. 20 low-carbon steel.

[0024] In this embodiment, the grain size of the special test block in which the column 1 and the semi-cylinder 2 are processed and manufactured as one body is 7-8.

[0025] It should be noted that the factory inspection of the sound velocity of the special test block is allowed to deviate from the nominal value by plus or minus 1%. When 5MHz is used, the sound attenuation coefficient of the ultrasonic longitudinal wave in the test block material at room temperature is not greater than 5dB / m. When 10MHz is used, the sound attenuation coefficient of the ultrasonic longitudinal wave in the test block material at room temperature is not greater than 20dB / m.

[0026] like Figure 4 and Figure 5 As shown, the nine probes 5 are respectively a 0° probe, a front +37° probe, a rear -37° probe, a front +70° probe, a rear -70° probe, a front left oblique +70° probe, a front right oblique +70° probe, a rear left oblique -70° probe, and a rear right oblique -70° probe.

[0027] When the utility model is used, the rail detection wheel is pressed on the test block, and appropriate coupling agent is added in the middle to maintain stable acoustic coupling. The 0° probe in the rail detection wheel is moved to align with the flat bottom hole on the bottom surface of the test block, and the 0° probe detection work is performed. The rail detection wheel is moved in sequence to align the front +37° probe and the front +70° probe in the wheel with the cylindrical surface on the left side of the test block, and the front +37° probe and the front +70° probe are performed. At this time, the rear -37° probe and the rear -70° probe can be detected without adjustment or fine adjustment; the rail detection wheel is tilted 70° forward and backward to detect The inclination angle of the head is a, rotate the rail detection wheel counterclockwise by angle a, and move the rail detection wheel in sequence to align the front right oblique +70° probe and the rear left oblique -70° probe with the cylindrical surfaces on the left and right sides of the test block, and perform the detection work of the front right oblique +70° probe and the rear left oblique -70° probe. Finally, rotate the rail detection wheel clockwise by angle 2a, and move the rail detection wheel in sequence to align the front left oblique +70° probe and the rear right oblique -70° probe with the cylindrical surfaces on the right and left sides of the test block, and perform the detection work of the front left oblique +70° probe and the rear right oblique -70° probe.

[0028] The above is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent structural change made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A special test block for rail wheel probe echo frequency detection, characterized in that: The invention comprises a column (1) of a rectangular parallelepiped structure and a semi-cylinder (2) arranged on the upper part of the column (1); the semi-cylinder (2) is arranged on the upper part of the column (1) in a symmetrical structure; the rectangular outer surface of the semi-cylinder (2) faces upward and is coplanar with the upper surface of the column (1); two semi-circular outer surfaces of the semi-cylinder (2) are arranged in parallel with a group of vertical outer surfaces opposite to the column (1); the length and width of the column (1) are equal, and the length of the column (1) is smaller than the height of the column (1); the height of the column (1) is larger than the diameter of the semi-circular cross section of the semi-cylinder (2); the thickness of the semi-cylinder (2) is smaller than the length of the column (1); a flat bottom hole (3) is arranged at the center of the bottom of the column (1); and the diameter of the semi-circular cross section of the semi-cylinder (2) is larger than the diameter of the rail detection wheel (4).

2. A special test block for detecting echo frequency of a rail wheel probe according to claim 1, characterized in that: The height of the column (1) is 225 mm, the length and width of the column (1) are both 80 mm, the diameter of the flat bottom hole (3) is 2 mm, and the height of the flat bottom hole (3) is 25 mm.

3. A special test block for detecting echo frequency of a rail wheel probe according to claim 1, characterized in that: The diameter of the semicircular cross section of the semi-cylinder (2) is 200 mm, and the thickness of the semi-cylinder (2) is 40 mm.

4. A special test block for detecting echo frequency of a rail wheel probe according to claim 1, characterized in that: The column (1) and the semi-cylinder (2) are processed and manufactured as one body, and the special test block in which the column (1) and the semi-cylinder (2) are processed and manufactured as one body is a special test block made of No. 20 low-carbon steel.

5. A special test block for detecting echo frequency of a rail wheel probe according to claim 4, characterized in that: The grain size of the special test block in which the column (1) and the semi-cylinder (2) are processed and manufactured as one body is 7 to 8 levels.

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