Tool mounting rack for scratching sample tube of steel tube ultrasonic flaw detector

Abstract

The utility model discloses a cutter mounting frame for scratching a sample tube of a steel tube ultrasonic flaw detector, which comprises a flaw detector cutter frame, an inclined flaw detector tool, a locking mechanism and a cutter fixing component, and the flaw detector cutter frame is provided with a square mounting groove; the oblique carving tool is provided with a mounting seat and a cutter mounting seat arranged on the mounting seat, the mounting seat is mounted in the square mounting groove, and the cutter mounting seat is provided with a limiting groove which is obliquely formed relative to the length direction of the cutter mounting seat and is suitable for mounting a blade; at least one radial threaded hole communicated with the limiting groove is formed in the peripheral wall of the cutter mounting seat; the locking mechanism is arranged on the cutting machine tool rest, the locking mechanism is suitable for being fixed to an inclined cutting tool in the square mounting groove, and the tool fixing assembly is suitable for being in threaded connection with the radial threaded hole and abutting against the blade in the limiting groove. The device can be conveniently installed on existing equipment, and the equipment transformation cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of knife tool mounting rack for sample pipe scratch of steel pipe ultrasonic flaw detector, belong to steel pipe scratch machine technical field. BACKGROUND

[0002] At present, steel pipe ultrasonic flaw detection is a commonly used nondestructive testing method. Its working principle is that high-frequency electric pulse generated by ultrasonic flaw detector is added to the probe, exciting the piezoelectric wafer in the probe to vibrate, so that ultrasonic wave is generated. Ultrasonic wave propagates at a certain speed into the steel pipe, when encountering defects, part of the sound wave is reflected back, and the other part of the sound wave continues to propagate forward and is reflected back after encountering the bottom surface of the steel pipe. The sound waves reflected by the defects and the bottom surface reach the probe, and the sound vibration is converted into electric pulse through the piezoelectric wafer. The reflected wave, defect wave and bottom wave are amplified by the instrument and displayed on the instrument. In the process of ultrasonic flaw detection of steel pipe, scratch knife is used to make simulated defects on sample pipe to verify the detection capability of flaw detection equipment.

[0003] After searching the prior art, it is found that the Chinese patent with publication number CN206330811U discloses a steel pipe ultrasonic flaw detection sample pipe arbitrary angle defect scratch machine. The sample pipe fixing frame, knife holder, knife rod, adjusting screw and other components are used in the patent to realize the angle adjustment of the scratch knife holder. However, it is found that the knife holder and the knife rod require a certain installation space, which is not convenient for direct use on existing equipment. SUMMARY

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a knife tool mounting rack for sample pipe scratch of steel pipe ultrasonic flaw detector, which can be conveniently installed on existing equipment to reduce the cost of modifying equipment.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows: a knife tool mounting rack for sample pipe scratch of steel pipe ultrasonic flaw detector, comprising:

[0006] A scratch machine knife holder is provided with a square mounting groove;

[0007] An oblique scratch tool is provided with a mounting seat and a knife tool mounting seat arranged on the mounting seat. The mounting seat is installed in the square mounting groove. The knife tool mounting seat is provided with a limiting groove suitable for installing a blade, which is inclined relative to the length direction of the knife tool mounting seat. At least one radial threaded hole is formed in the outer peripheral wall of the knife tool mounting seat and communicates with the limiting groove.

[0008] A locking mechanism is arranged on the scratch machine knife holder, and the locking mechanism is suitable for locking the mounting seat of the oblique scratch tool in the square mounting groove.

[0009] A tool fixing assembly is adapted to be threadedly connected with the radial threaded hole and abut against the blade in the limiting groove.

[0010] Further, the mounting seat and the tool mounting seat are integrated structures.

[0011] Further, at least one threaded mounting hole is formed in the side wall of the marking machine tool holder.

[0012] The locking mechanism includes at least one locking screw adjustably threadedly connected in the threaded mounting hole, and the end of the locking screw is adapted to abut against the mounting seat to lock the mounting seat in the square mounting groove.

[0013] Further, the oblique marking tool is provided with an adjusting threaded hole vertically penetrating the mounting seat and the tool mounting seat, and the adjusting threaded hole is in communication with the limiting groove.

[0014] The steel pipe ultrasonic flaw detector sample tube scratch tool mounting rack further includes a depth adjusting screw threadedly connected with the adjusting threaded hole, and the end of the depth adjusting screw is adapted to abut against the bottom surface of the blade to adjust the depth of the blade in the limiting groove.

[0015] Further, the oblique marking tool is made of 6061 alloy.

[0016] Further, the mounting seat and the tool mounting seat are separate structures.

[0017] Further, a plurality of positioning grooves are uniformly distributed on the upper surface of the mounting seat with the axis of the tool mounting seat as the center, and the tool mounting seat is provided with a positioning assembly mounting hole corresponding to the positioning groove.

[0018] The steel pipe ultrasonic flaw detector sample tube scratch tool mounting rack further includes an elastic positioning assembly fixedly installed in the positioning assembly mounting hole of the tool mounting seat, and the elastic positioning assembly includes at least one elastic top bead member adapted to form a detachable positioning matching relationship with the positioning groove.

[0019] Further, a specific structure of an elastic top bead member is provided, and the elastic top bead member includes:

[0020] A positioning seat body is fixedly arranged in the positioning assembly mounting hole, and the positioning seat body has an axially extending inner cavity, and the end of the positioning seat body is provided with a limiting opening in communication with the inner cavity.

[0021] A spherical positioning member is slidingly arranged in the inner cavity of the positioning seat body.

[0022] An elastic element, one end of which is in abutment with the bottom wall of the inner cavity of the positioning seat body, and the other end of which is in abutment with the spherical positioning member.

[0023] Further, a specific degree of the central angle between adjacent positioning grooves is provided, and the central angle between adjacent positioning grooves on the circumferential surface of the mounting seat is 5 degrees.

[0024] Further, the inner diameter of the limiting opening is smaller than the outer diameter of the spherical positioning member.

[0025] Further, a specific structure of the angle indicating assembly is provided, and the cutter mounting rack for sample pipe scratch of the steel pipe ultrasonic flaw detector further comprises an angle indicating assembly, and the angle indicating assembly comprises:

[0026] A scale indicating line is arranged on the outer peripheral wall of the cutter mounting seat.

[0027] An indicating mark component is fixedly arranged on the mounting seat.

[0028] Further, a specific degree between adjacent scale lines is provided, and the scale indicating line comprises a plurality of scale lines arranged at equal intervals along the circumferential surface of the cutter mounting seat, and the angular interval between adjacent scale lines is 5 degrees.

[0029] Further, a specific structure of the eccentric clamping mechanism is provided, and an annular arc groove is arranged at the lower part of the outer circumferential wall of the cutter mounting seat.

[0030] The cutter mounting rack for sample pipe scratch of the steel pipe ultrasonic flaw detector further comprises an eccentric clamping mechanism, and the eccentric clamping mechanism comprises:

[0031] A fixed seat assembly comprises two fixed blocks arranged symmetrically, and the fixed blocks are fixedly arranged on the mounting seat.

[0032] An eccentric cam assembly comprises an eccentric wheel body, and the two ends of the eccentric wheel body in the axial direction are respectively rotatably connected with the two fixed blocks, and the outer peripheral surface of the eccentric wheel body is in abutment with the bottom wall of the annular arc groove.

[0033] A control rod, one end of which is fixedly connected with the end of the eccentric wheel body, and the other end of which extends away from the eccentric wheel body, is adapted to drive the eccentric wheel body to rotate to change the abutment force between the outer peripheral surface of the eccentric wheel body and the bottom wall of the annular arc groove.

[0034] Further, the eccentric clamping mechanism further comprises a rotating stopper, one end of the rotating stopper is rotationally connected with one of the fixed blocks, and the other end of the rotating stopper is adapted to rotate around the rotationally connected end when the operating lever is rotated to be parallel to the fixed block to stop the rotation of the operating lever.

[0035] By adopting the technical scheme, the utility model has the beneficial effects that:

[0036] In the use process, first, the blade is placed in the limiting groove on the cutter mounting seat, the cutter fixing assembly is screwed into the radial threaded hole and abuts against the blade, and the stable installation of the blade is ensured; then, the mounting seat of the oblique marking tool is aligned and inserted into the square mounting groove of the marking machine tool rest; finally, the mounting seat is locked by the locking mechanism, and is firmly fixed in the square mounting groove.

[0037] In addition, by setting the cutter mounting seat in a split mounting seat, setting the scale indicating line on the cutter mounting seat, and setting the indicating mark component on the mounting seat, the operator can intuitively observe and control the rotation angle of the blade;

[0038] In summary, the utility model is simple to operate and firmly fixed, is suitable for existing equipment, and ensures that the angle adjustment of the blade for the sample pipe scratch of the steel pipe ultrasonic flaw detector meets the process requirements. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is a perspective structural schematic view of the cutter mounting rack for the sample pipe scratch of the steel pipe ultrasonic flaw detector in embodiment 1;

[0040] Figure 2 It is a structural schematic view of the mounting seat of the cutter mounting rack for the sample pipe scratch of the steel pipe ultrasonic flaw detector in embodiment 2;

[0041] Figure 3 It is a perspective structural schematic view of the cutter mounting rack for the sample pipe scratch of the steel pipe ultrasonic flaw detector in embodiment 3;

[0042] Figure 4 It is a perspective structural schematic view of the cutter mounting rack for the sample pipe scratch of the steel pipe ultrasonic flaw detector in embodiment 4;

[0043] Figure 5 It is Figure 4 It is a partial enlarged view of part A in the figure;

[0044] Figure 6 It is a perspective structural schematic view of the marking machine tool rest of the cutter mounting rack for the sample pipe scratch of the steel pipe ultrasonic flaw detector in embodiment 1. DETAILED DESCRIPTION

[0045] In order to make the content of the utility model more easily be clearly understood, the following according to specific embodiment and combining with the drawings, the utility model is further explained in detail.

[0046] Embodiment 1

[0047] As Figures 1-6 Indicated, a kind of steel pipe ultrasonic flaw detector sample tube scratch cutter mounting rack, comprising:

[0048] Scratch machine tool rest 4, scratch machine tool rest 4 is equipped with square installation slot 41;

[0049] Oblique scratch tooling, oblique scratch tooling is equipped with mounting seat 1 and tool mounting seat 2 arranged on mounting seat 1, mounting seat 1 is installed in square installation slot 41, tool mounting seat 2 is equipped with the limiting slot 22 suitable for installing blade, which is inclinedly arranged relative to the length direction of tool mounting seat 2, two radial threaded holes 23 communicated with limiting slot 22 are formed on the outer peripheral wall of tool mounting seat 2;

[0050] Locking mechanism 5, locking mechanism 5 is arranged on scratch machine tool rest, locking mechanism 5 is suitable for locking the mounting seat 1 of oblique scratch tooling in square installation slot 41;

[0051] Tool fixing assembly 3, tool fixing assembly 3 is suitable for being screwed with radial threaded hole 23 and abutting blade in limiting slot 22.

[0052] In the embodiment, as Figures 1-2 Indicated, in use, first, blade is placed in limiting slot 22 on tool mounting seat 2, by tool fixing assembly 3 is screwed into radial threaded hole 23 and is in abutment with blade, ensure the stable installation of blade;Then, the mounting seat 1 of oblique scratch tooling is aligned and inserted into the square installation slot 41 of scratch machine tool rest 4;Finally, by locking mechanism 5 locks mounting seat 1, so that it is firmly fixed in square installation slot 41.

[0053] Specifically, as Figure 1 Indicated, mounting seat 1 and tool mounting seat 2 are integrated structure.

[0054] Specifically, as Figure 1 And Figure 6 Indicated, six threaded mounting holes are formed on the side wall of scratch machine tool rest 4;

[0055] Locking mechanism 5 includes six locking screws, locking screws are adjustably screwed in threaded mounting hole, and the end of locking screw is suitable for abutting with mounting seat 1 to lock mounting seat 1 in square installation slot 41.

[0056] In the embodiment, as Figure 6As shown, the six threaded mounting holes are divided into three groups, two in each group, which are respectively arranged on the front and rear sides and the right side of the square mounting groove 41.

[0057] Specifically, as shown in Figure 1 and Figure 6 As shown, the oblique scratching tool is provided with an adjusting threaded hole penetrating the mounting seat 1 and the tool mounting seat 2 in the vertical direction, which is in communication with the limiting groove 22.

[0058] The tool mounting rack for scratching the sample pipe of the steel pipe ultrasonic flaw detector further includes a depth adjusting screw, which is threadedly connected with the adjusting threaded hole, and the end of the depth adjusting screw is adapted to abut against the bottom surface of the blade to adjust the depth of the blade in the limiting groove 22.

[0059] Specifically, the oblique scratching tool is made of 6061 alloy.

[0060] Embodiment 2

[0061] This embodiment is basically the same as Embodiment 1, except that:

[0062] Specifically, as shown in Figure 1 The mounting seat 1 and the tool mounting seat 2 are in a split structure.

[0063] In this embodiment, as shown in Figure 1 The mounting seat 1 and the tool mounting seat 2 can be fixedly connected by penetrating holes of the mounting seat 1 and the tool mounting seat 2 plus bolts and nuts, or a threaded hole can be arranged on one of the mounting seat 1 or the tool mounting seat 2, and a corresponding connecting hole can be arranged on the other one, and the mounting seat 1 and the tool mounting seat 2 are fixedly connected by a screw threadedly connected in the connecting hole.

[0064] Specifically, as shown in Figures 1-2 The upper surface of the mounting seat 1 is uniformly distributed with a plurality of positioning grooves 11 with the axis of the tool mounting seat 2 as the center, and the tool mounting seat 2 is provided with a positioning component mounting hole corresponding to the positioning groove 11.

[0065] The tool mounting rack for scratching the sample pipe of the steel pipe ultrasonic flaw detector further includes an elastic positioning component, which is fixedly installed in the positioning component mounting hole of the tool mounting seat 2, and the elastic positioning component includes four elastic top bead members, which are adapted to form a detachable positioning matching relationship with the positioning groove 11.

[0066] In this embodiment, as shown in Figures 1-2As shown, when the blade angle needs to be adjusted, the elastic top bead member is separated from the current positioning groove 11 by applying a rotating torque to overcome the force of the elastic element, at which time the tool mounting seat 2 can be rotated. During rotation, the spherical positioning member slides on the upper surface of the mounting seat 1. When rotated to the target angle, the elastic element pushes the spherical positioning member into the corresponding positioning groove 11 to achieve positioning. Thus, the blade angle is quickly and accurately adjusted, improving the convenience and reliability of blade installation angle adjustment.

[0067] The steel pipe ultrasonic flaw detector needs to use a sample pipe for system calibration. The sample pipe and the steel pipe to be detected should have the same nominal size and maintain similar chemical composition, surface state, heat treatment state and acoustic performance.

[0068] When detecting longitudinal defects, the surface of the sample pipe is used for calibration, and the direction of the scratch is parallel to the axis of the steel pipe; when detecting transverse defects, the surface of the sample pipe is used for calibration, and the direction of the scratch is perpendicular to the axis of the steel pipe. With the increasing requirement for detection accuracy, it is necessary to detect scratches at different angles, such as 5 degrees, 10 degrees, 30 degrees, etc. with respect to the axis of the steel pipe. The tool mounting seat 2 can rotate around its axis to adjust the angle of the tool, and the angle is positioned by the elastic positioning assembly and the positioning groove 11, and the angle can be displayed by the angle indicating assembly.

[0069] In practical application, the quality of the scratch mainly depends on the contact state between the tool and the surface of the sample pipe, the uniformity of the scratch depth, and the accuracy of the angle. The blade is limited by the limiting groove 22, and is firmly fixed by the tool fixing assembly 3. The positioning groove 11 ensures the accuracy and repeatability of each angle adjustment. The eccentric clamping mechanism realizes reliable fixation of the tool mounting seat 2 by the cooperation of the eccentric body and the annular arc groove 21, preventing displacement during machining.

[0070] The blade can be an electrode piece, and the inclined artificial defect is machined by an electric pulse scratching device. The tool fixing assembly 3 can be a fastening screw, which is screwed into the radial threaded hole 23, abuts against and fixes the blade in the limiting groove 22 connected with the radial threaded hole 23.

[0071] Specifically, the elastic top bead member includes:

[0072] The positioning seat body is fixedly arranged in the positioning assembly mounting hole, and has an axially extending inner cavity. The end of the positioning seat body is provided with a limiting opening communicating with the inner cavity;

[0073] The spherical positioning member is slidingly arranged in the inner cavity of the positioning seat body.

[0074] The elastic element abuts against the inner cavity bottom wall of the positioning seat body at one end and abuts against the spherical positioning member at the other end.

[0075] Specifically, as shown in Figures 1-2 The central angle between the adjacent positioning grooves 11 uniformly distributed on the upper surface of the mounting seat 1 is 5 degrees.

[0076] Specifically, the inner diameter of the limiting opening is smaller than the outer diameter of the spherical positioning member.

[0077] In this embodiment, as shown in Figures 1-2 The positioning assembly mounting hole is provided with a thread, and the positioning seat body is threadedly connected in the positioning assembly mounting hole. During installation, since the inner diameter of the limiting opening is smaller than the outer diameter of the spherical positioning member, the spherical positioning member is limited in the positioning seat body, and only part of the spherical surface protrudes out of the limiting opening. The elastic element applies an axial force to the spherical positioning member, so that the spherical positioning member forms a positioning fit with the positioning groove 11.

[0078] When it is necessary to adjust the angle of the tool mounting seat 2, a rotary torque is applied to make the spherical positioning member overcome the elastic force of the elastic element and disengage from the current positioning groove 11. During the rotation of the tool mounting seat 2, the spherical positioning member slides on the upper surface of the mounting seat 1. When rotated to the target angle, the spherical positioning member enters the corresponding positioning groove 11 under the action of the elastic element. Since the central angle between the adjacent positioning grooves 11 is 5 degrees, the positioning of every 5-degree angle can be achieved.

[0079] The elastic element can be a compression spring, and the size of the positioning force can be adjusted by adjusting the stiffness of the spring. The elastic top bead member is a prior art, and this embodiment will not be described in detail.

[0080] Embodiment 3

[0081] This embodiment is basically the same as embodiment 2, and the difference is that:

[0082] Specifically, as shown in Figure 1 and Figure 3 The tool mounting rack for pipe ultrasonic flaw detection machine sample pipe scratch also includes an angle indicating assembly, and the angle indicating assembly includes:

[0083] A scale indicating line 51 is arranged on the outer peripheral wall of the tool mounting seat 2.

[0084] An indicating mark component 52 is fixedly arranged on the mounting seat 1.

[0085] Specifically, as shown in Figure 1 and Figure 3 The scale indicating line 51 includes a plurality of scale lines arranged at equal intervals along the circumferential wall of the tool mounting seat 2, and the angle interval between adjacent scale lines is 5 degrees.

[0086] In the present embodiment, as shown in Figure 1 and Figure 3 , the scale indicating lines 51 are arranged equidistantly along the outer circumferential wall of the tool mounting seat 2, and the indicating mark component 52 is fixed to the mounting seat 1 as a reference point. When the tool mounting seat 2 rotates, the scale indicating lines 51 rotate accordingly, and by observing the corresponding scale indicating line 51 of the indicating mark component 52, the current angle of the tool mounting seat 2 can be directly read.

[0087] Through the angle indicating assembly, the operator can directly observe the rotation angle of the tool mounting seat 2 during adjustment, ensuring the accuracy of the tool angle adjustment. The angle indicating assembly can also be used to record and reproduce a specific tool mounting angle, facilitating the maintenance of consistent scratching angles between different workpieces.

[0088] Embodiment 4

[0089] The present embodiment is basically the same as Embodiment 2, with the difference being that:

[0090] Specifically, as shown in Figure 1 and Figures 4-5 , an annular arc groove 21 is formed in the lower part of the outer circumferential wall of the tool mounting seat 2;

[0091] The steel pipe ultrasonic flaw detector sample tube scratching tool mounting rack further comprises an eccentric clamping mechanism, which comprises:

[0092] A fixed seat assembly, which comprises two fixed blocks arranged symmetrically and fixedly arranged on the mounting seat 1;

[0093] An eccentric cam assembly 31, which comprises an eccentric wheel body, the two ends of the eccentric wheel body in the axial direction are rotationally connected with the two fixed blocks respectively, and the outer circumferential surface of the eccentric wheel body abuts against the bottom wall of the annular arc groove 21;

[0094] A control lever 32, one end of which is fixedly connected with the end of the eccentric wheel body, and the other end extends away from the eccentric wheel body, and the control lever 32 is adapted to drive the eccentric wheel body to rotate to change the abutting force between the outer circumferential surface of the eccentric wheel body and the bottom wall of the annular arc groove 21.

[0095] Specifically, as shown in Figure 1 and Figures 4-5 , the eccentric clamping mechanism further comprises a rotating baffle 33, one end of which is rotationally connected with one of the fixed blocks, and the other end of the rotating baffle 33 is adapted to rotate about its rotationally connected end to stop the rotation of the control lever 32 when the control lever 32 is rotated to be parallel to the fixed block.

[0096] In the present embodiment, as shown in Figure 1 and Figures 4-5As shown, two fixed blocks are symmetrically fixed on the mounting base 1, and two ends of the eccentric wheel body are rotatably connected with the fixed blocks. When the control lever 32 drives the eccentric wheel body to rotate, the abutting force between the outer circumferential surface of the eccentric wheel body and the bottom wall of the annular arc groove 21 changes due to the eccentric design of the eccentric wheel body. When the control lever 32 is rotated to the clamping position, the outer circumferential surface of the eccentric wheel body exerts the maximum abutting force on the bottom wall of the annular arc groove 21, thereby realizing the axial fixation of the tool mounting base 2.

[0097] One end of the rotating baffle 33 is rotatably connected with the fixed block. When the control lever 32 is rotated to the clamping position, the rotating baffle 33 is rotated to stop the other end of the rotating baffle 33 from the control lever 32. Through the stopping effect of the rotating baffle 33, the rotation of the control lever 32 caused by external force is prevented, and the abutting force between the eccentric wheel body and the annular arc groove 21 is reduced. When it is needed to adjust the angle of the tool mounting base 2, the rotating baffle 33 is rotated to release the stopping of the control lever 32, and the control lever 32 is further rotated to release the abutting force of the eccentric wheel body on the annular arc groove 21.

[0098] The above-described specific embodiments further illustrate the technical problems solved by the utility model, technical solutions and beneficial effects. It should be understood that the above-described specific embodiments are merely examples of the utility model and are not used to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A tool mounting bracket for scratching sample tubes in an ultrasonic flaw detector for steel pipes, characterized in that, It comprises: a scratch machine tool rest (4) provided with a square mounting groove (41); a diagonal scratching tool provided with a mounting seat (1) and a tool mounting seat (2) provided on the mounting seat (1), the mounting seat (1) is mounted in the square mounting groove (41), the tool mounting seat (2) is provided with a limiting groove (22) suitable for mounting the blade and inclined relative to the length direction of the tool mounting seat (2), at least one radial threaded hole (23) is provided on the outer peripheral wall of the tool mounting seat (2) and communicated with the limiting groove (22); a locking mechanism (5) provided on the scratch machine tool rest, the locking mechanism (5) is suitable for locking the mounting seat (1) of the diagonal scratching tool in the square mounting groove (41); a tool fixing assembly (3) suitable for being threadedly connected with the radial threaded hole (23) and abutting against the blade in the limiting groove (22).

2. The steel pipe ultrasonic flaw detector sample pipe scratch tool mounting rack according to claim 1, wherein the mounting seat (1) and the tool mounting seat (2) are an integral structure.

3. The steel pipe ultrasonic flaw detector sample pipe scratch tool mounting rack according to claim 1, wherein at least one threaded mounting hole is provided on the side wall of the scratch machine tool rest (4); the locking mechanism (5) comprises at least one locking screw, the locking screw is adjustably threadedly connected in the threaded mounting hole, and the end of the locking screw is suitable for abutting against the mounting seat (1) to lock the mounting seat (1) in the square mounting groove (41).

4. The steel pipe ultrasonic flaw detector sample pipe scratch tool mounting rack according to claim 1, wherein the diagonal scratching tool is provided with an adjusting threaded hole vertically penetrating the mounting seat (1) and the tool mounting seat (2), the adjusting threaded hole is communicated with the limiting groove (22); further comprising a depth adjusting screw, the depth adjusting screw is threadedly connected with the adjusting threaded hole, and the end of the depth adjusting screw is suitable for abutting against the bottom surface of the blade to adjust the depth of the blade in the limiting groove (22).

5. The steel pipe ultrasonic flaw detector sample pipe scratch tool mounting rack according to claim 1, wherein the diagonal scratching tool is 6061 alloy.

6. The steel pipe ultrasonic flaw detector sample pipe scratch tool mounting rack according to claim 1, wherein the mounting seat (1) and the tool mounting seat (2) are a split structure.

7. The steel pipe ultrasonic flaw detector sample pipe scratch tool mounting rack according to claim 6, wherein a plurality of positioning grooves (11) are uniformly distributed on the upper surface of the mounting seat (1) with the axis of the tool mounting seat (2) as the center, the tool mounting seat (2) is provided with a positioning assembly mounting hole corresponding to the positioning groove (11). ​ ​ ​ ​ ​ ​ Further comprising a resilient positioning assembly fixedly installed in the positioning assembly mounting hole of the tool mounting seat (2), the resilient positioning assembly comprising at least one resilient top bead member adapted to form a detachable positioning fit with the positioning groove (11).

8. The tool mounting rack for pipe marking of a steel pipe ultrasonic flaw detector according to claim 7, characterized in that, The resilient top bead member comprises: a positioning seat body fixedly arranged in the positioning assembly mounting hole, the positioning seat body having an axially extending inner cavity, and the end of the positioning seat body being provided with a limiting opening in communication with the inner cavity; a spherical positioning member slidingly arranged in the inner cavity of the positioning seat body; a resilient element abutting against the inner cavity bottom wall of the positioning seat body at one end and abutting against the spherical positioning member at the other end.

9. The tool mounting rack for pipe marking of a steel pipe ultrasonic flaw detector according to claim 8, characterized in that, The center angle between the adjacent positioning grooves (11) on the upper surface of the mounting seat (1) is 5 degrees.

10. The tool mounting rack for pipe marking of a steel pipe ultrasonic flaw detector according to claim 9, characterized in that, Further comprising an angle indicating assembly, the angle indicating assembly comprising: a scale indicating line (51) arranged on the outer peripheral wall of the tool mounting seat (2); an indicating mark component (52) fixedly arranged on the mounting seat (1).

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