An ultrasonic testing block and testing method for a pressure regulator upper head pipe nozzle

Abstract

The application discloses a kind of ultrasonic testing block and detection method for the pipe nozzle of upper head of stabilizer, testing block includes TCG curve parameter test block, it includes body, first cladding layer and simulation groove part;And inner fillet simulation body test block, inner fillet simulation body test block includes pipe body, second cladding layer and crescent groove part;The present application can effectively simulate the form of the outer surface of the inner fillet area of the pipe nozzle of upper head of stabilizer by processing first cladding layer and simulation groove part on the outer surface of TCG curve parameter test block, test the coupling state of ultrasonic probe, and make ultrasonic inspection result more reliable;By processing second cladding layer on the inner surface of inner fillet simulation body test block, the form of the inner surface of the inner fillet area of the pipe nozzle of upper head of stabilizer can be effectively simulated, test the beam coverage effect of ultrasonic probe, and make ultrasonic inspection result more reliable;By processing crescent groove part in inner fillet simulation body test block, ultrasonic time-gain correction TCG curve and scanning sensitivity calibration can be effectively carried out.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear power, in particular to a kind of ultrasonic test block and detection method for header nozzle of pressurizer. BACKGROUND

[0002] The pipe nozzle of pressurizer header connects pipe nozzle and container cylinder, and the inner fillet is the internal transition structure, the material is low alloy steel and the inside is covered with stainless steel overlay. Due to the particularity of this part, cracks will occur under the overlay, so in the in-service inspection of nuclear power plants, ultrasonic testing can be used for inspection. During ultrasonic testing, internal access is not possible, so inspection must be performed from the outside of the container. However, due to the complex saddle surface geometry and the arc shape of the outer surface, these factors make ultrasonic testing difficult. SUMMARY

[0003] The technical problem to be solved by the present application is to provide an ultrasonic test block and detection method for the nozzle of the pressurizer header.

[0004] The technical solution adopted by the present application to solve the technical problem is: an ultrasonic test block for the nozzle of the pressurizer header, comprising:

[0005] A TCG curve test block is used to test the shape of the outer surface of the inner fillet area of the nozzle of the pressurizer header in a nuclear power plant. The TCG curve test block for testing the coupling state of the ultrasonic probe includes a body, a first overlay, and a simulated grooving portion. The first overlay is provided on the body, and the simulated grooving portion is provided on the first overlay and the body.

[0006] Or / and, an inner fillet simulation test block is used to simulate the shape of the inner surface of the inner fillet area of the nozzle of the pressurizer header in a nuclear power plant. The inner fillet simulation test block for testing the beam coverage effect of the ultrasonic probe includes a pipe body, a second overlay, and a crescent groove portion for TCG curve and scanning sensitivity calibration. The second overlay is provided in the pipe body, and the crescent groove portion is provided on the second overlay and the pipe body.

[0007] Further, in the ultrasonic test block for the nozzle of the pressurizer header, the simulated grooving portion preferably includes a first grooving portion, a second grooving portion, a third grooving portion, and a circular arc groove.

[0008] The first grooving portion, the second grooving portion, and the third grooving portion are all provided through the first overlay and extend to the body. The circular arc groove is provided on the upper surface of the body and the first overlay.

[0009] Further, in the ultrasonic test block for the nozzle of the pressurizer header, the first overlay preferably includes a left weld layer and a right weld layer provided on opposite sides of the body, respectively.

[0010] The first groove and the second groove are both through openings in the left weld layer and extend to the body;

[0011] The third groove is a through opening in the right weld layer and extends to the body.

[0012] Further, in the ultrasonic test block for the nozzle of the upper head of the voltage stabilizer, preferably the crescent groove part includes a first crescent groove, a second crescent groove and a third crescent groove through openings in the second cladding layer and extending to the pipe body.

[0013] Further, in the ultrasonic test block for the nozzle of the upper head of the voltage stabilizer, preferably the first crescent groove and the third crescent groove are oppositely arranged, and the second crescent groove is arranged at a position 90 degrees rotated from the first crescent groove along the central axis of the pipe body.

[0014] Further, in the ultrasonic test block for the nozzle of the upper head of the voltage stabilizer, preferably the pipe body includes an inner fillet straight pipe part, an inner fillet corner part and an inner fillet end part connected in sequence;

[0015] The second cladding layer includes a cladding layer straight pipe part, a cladding layer corner part and a cladding layer end part connected in sequence;

[0016] The inner fillet straight pipe part, the inner fillet corner part and the inner fillet end part are respectively sleeved outside the cladding layer straight pipe part, the cladding layer corner part and the cladding layer end part.

[0017] Further, in the ultrasonic test block for the nozzle of the upper head of the voltage stabilizer, preferably the first crescent groove, the second crescent groove and the third crescent groove are respectively through openings in the cladding layer straight pipe part, the cladding layer corner part and the cladding layer end part and extend to the inner fillet straight pipe part, the inner fillet corner part and the inner fillet end part.

[0018] Further, in the ultrasonic test block for the nozzle of the upper head of the voltage stabilizer, preferably the central line of the first groove and the central line of the second groove form an angle of °.

[0019] Further, in the ultrasonic test block for the nozzle of the upper head of the voltage stabilizer, preferably the first groove, the second groove and the third groove each include at least one groove body.

[0020] A detection method of an ultrasonic test block for the nozzle of the upper head of a voltage stabilizer, including the following steps: S1, after the time base information of the ultrasonic probe is calibrated, the probe is placed on the circular arc groove of the TCG curve test block;

[0021] S2, the mobile ultrasonic probe finds the highest echo amplitude in the first notch, the second notch and the third notch, adjusts the instrument gain so that the signal is located at the % of the full screen height of the instrument ± %, and records the adjusted gain value;

[0022] S3, keep the instrument settings unchanged, find the highest signal echo outside the first notch, the second notch and the third notch, and also adjust the height of the signal echo to the % of the full screen height of the instrument ± %, and record the adjusted gain value;

[0023] S4, taking the depth of the first notch, the second notch and the third notch as the horizontal coordinate, connecting the points in turn to make a TCG curve;

[0024] S5, using the inner fillet simulation body test block to verify the sensitivity of the TCG curve.

[0025] The implementation of the present application has the following beneficial effects: by processing the first overlay layer and the simulated notch part on the outer surface of the TCG curve reference block, the morphology of the outer surface of the inner corner area of the nozzle of the upper head of the stabilizer can be effectively simulated, the coupling state of the ultrasonic probe can be tested, and the ultrasonic inspection result is more reliable; by processing the second overlay layer on the inner surface of the inner corner simulation body test block, the morphology of the inner surface of the inner corner area of the nozzle of the upper head of the stabilizer can be effectively simulated, the sound beam coverage effect of the ultrasonic probe can be tested, and the ultrasonic inspection result is more reliable; by processing the crescent groove part in the inner corner simulation body test block, the ultrasonic time-gain correction TCG curve and the scanning sensitivity calibration can be effectively performed. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described below in combination with the drawings and examples, and the drawings are as follows:

[0027] Figure 1 is a schematic diagram of the TCG curve reference block of the ultrasonic inspection test block of the nozzle of the upper head of the stabilizer in some embodiments of the present application;

[0028] Figure 2 is a schematic diagram of the inner corner simulation body test block of the ultrasonic inspection test block of the nozzle of the upper head of the stabilizer in some embodiments of the present application;

[0029] Figure 3 is Figure 1 a schematic diagram of the exploded structure of the TCG curve reference block shown;

[0030] Figure 4 is Figure 2 a schematic diagram of the cross-sectional structure of the inner corner simulation body test block shown;

[0031] Figure 5 isFigure 2 Fig. 3 is a perspective exploded view of the inner corner simulation test block.

[0032] Reference signs in the schematic diagram are explained as follows:

[0033] 10, TCG curve test block;

[0034] 11, main body;

[0035] 12, first cladding layer; 121, left cladding layer; 122, right cladding layer;

[0036] 13, simulation notch part; 131, first notch; 132, second notch; 133, third notch; 134, arc notch;

[0037] 20, inner corner simulation test block;

[0038] 21, pipe body; 211, inner corner straight pipe part; 212, inner corner corner part; 213, inner corner end part;

[0039] 22, second cladding layer; 221, cladding layer straight pipe part; 222, cladding layer corner part; 223, cladding layer end part;

[0040] 23, crescent groove part; 231, first crescent groove; 232, second crescent groove; 233, third crescent groove. DETAILED DESCRIPTION

[0041] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the drawings. In the following description, it should be understood that the directions or positional relationships indicated by “front”, “back”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “head”, “tail” and the like are based on the directions or positional relationships shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the technical solutions, and should not be understood as indicating that the devices or elements referred to must have a particular direction, therefore, it should not be understood as a limitation on the present application.

[0042] It should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing", "setting" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "below" another element, the element can be "directly" or "indirectly" above the other element, or there can be one or more intervening elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the following description, specific details are set forth in order to provide a thorough understanding of the embodiments of the application. However, persons skilled in the art will understand that the application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary details.

[0044] The technical solution adopted by the present application to solve its technical problems is:

[0045] As Figures 1-2 shown, some embodiments of the present application disclose a pressure stabilizer upper head nozzle ultrasonic testing block and a detection method. The pressure stabilizer upper head nozzle ultrasonic testing block can include a TCG curve parameter test block 10 and an inner corner simulation body test block 20 in some embodiments. The TCG curve parameter test block 10 can include a body 11, a first cladding layer 12, and a simulated grooving part 13 in some embodiments. The first cladding layer 12 is arranged on the body 11, and the simulated grooving part 13 is arranged on the first cladding layer 12 and the body 11. It can be understood that by processing the simulated grooving part 13 on the outer surface of the TCG curve parameter test block 10, the morphology of the outer surface of the inner corner area of the pressure stabilizer upper head nozzle can be effectively simulated, the ultrasonic probe coupling state can be tested, and the ultrasonic inspection result is more reliable.

[0046] As Figure 3As shown, the inner corner simulation body test block 20 can include a tube body 21, a second cladding layer 22, and a crescent groove portion 23 in some embodiments. The second cladding layer 22 is sleeved on the tube body 21, and the crescent groove portion 23 is arranged on the second cladding layer 22 and the tube body 21. It can be understood that by processing the second cladding layer 22, the slope, the inner corner, and the like structure on the inner surface of the inner corner simulation body test block 20, the morphology of the inner surface of the inner corner area of the nozzle of the head of the pressurizer can be effectively simulated, the coverage effect of the ultrasonic probe beam can be tested, and the ultrasonic inspection result is more reliable; by processing the crescent groove portion 23 in the inner corner simulation body test block 20, the ultrasonic time-gain correction TCG curve and the scanning sensitivity calibration can be effectively performed.

[0047] With reference to Figure 2 , the first cladding layer 12 can include a left cladding layer 121 and a right cladding layer 122 arranged on the opposite sides of the body 11 in some embodiments. It can be understood that the body 11 is in the form of a trapezoidal block to facilitate the morphology of the outer surface of the inner corner area of the nozzle of the head of the pressurizer. The left cladding layer 121 and the right cladding layer 122 are arranged on the left and right sides of the body 11, respectively, and the left cladding layer 121 and the right cladding layer 122 are a layer of 5mm stainless steel cladding layer. In some embodiments, the left cladding layer 121 and the right cladding layer 122 are welded on the body 11, of course, in other embodiments, the left cladding layer 121 and the right cladding layer 122 can be connected on the body 11 by bonding, clamping, or the like.

[0048] With reference to Figure 1 , the simulation groove portion 13 can include a first groove 131, a second groove 132, a third groove 133, and a circular arc groove 134 in some embodiments. The first groove 131 and the second groove 132 are throughly arranged on the left cladding layer 121 and extend to the body 11, and the third groove 133 is throughly arranged on the right cladding layer 122 and extends to the body 11. The circular arc groove 134 is arranged on the upper surfaces of the left cladding layer 121, the body 11, and the right cladding layer 122. It can be understood that the first groove 131, the second groove 132, and the third groove 133 are used to simulate the range of inner corner detection. The circular arc groove 134 is used to simulate the contact surface of the ultrasonic probe.

[0049] In some embodiments, the angle between the center line of the first groove 131 and the center line of the second groove 132 is 29°, of course, in other embodiments, the angle between the center line of the first groove 131 and the center line of the second groove 132 can also be changed according to actual needs. In some embodiments, the first groove 131, the second groove 132, and the third groove 133 include at least one groove body. It can be understood that the first groove 131, the second groove 132, and the third groove 133 include three uniformly spaced groove bodies, and the length of the groove body is 25.4mm and the depth is 7.3mm(including the left cladding layer 121 and the right cladding layer 122). Of course, in other embodiments, the length and depth of the groove body can be set according to actual needs.

[0050] The radius of the circular groove 134 in some embodiments is 95 mm, simulating the contact surface of the ultrasonic probe. It can be understood that the circular groove 134 is concave and is arranged on the upper surface of the left weld layer 121, the body 11 and the right weld layer 122, in other words, the circular groove 134 is in a semicircular structure, used to simulate the contact surface of the ultrasonic probe. In other embodiments, the radius of the circular groove 134 can be set according to actual needs (for example, R75mm-R80mm). By processing the circular groove 134 and the like on the outer surface of the TCG curve test block 10, the shape of the outer surface of the inner corner area of the nozzle of the upper head of the stabilizer can be effectively simulated, the coupling state of the ultrasonic probe can be tested, and the ultrasonic inspection result is more reliable.

[0051] As shown in Figure 4 and Figure 5 In some embodiments, the pipe body 21 can include an inner corner straight pipe portion 211, an inner corner corner portion 212 and an inner corner end portion 213. The inner corner straight pipe portion 211, the inner corner corner portion 212 and the inner corner end portion 213 are sequentially connected to each other. The second cladding layer 22 includes a cladding layer straight pipe portion 221, a cladding layer corner portion 222 and a cladding layer end portion 223 which are sequentially connected. The inner corner straight pipe portion 211, the inner corner corner portion 212 and the inner corner end portion 213 are arranged outside the cladding layer straight pipe portion 221, the cladding layer corner portion 222 and the cladding layer end portion 223. It can be understood that the inner corner straight pipe portion 211, the inner corner corner portion 212 and the inner corner end portion 213 are attached to the outside of the cladding layer straight pipe portion 221, the cladding layer corner portion 222 and the cladding layer end portion 223. The inner corner straight pipe portion 211 and the cladding layer straight pipe portion 221 are both arranged longitudinally; the inner corner corner portion 212 and the inner corner end portion 213 are combined together in an eight-shaped structure and connected to the bottom of the inner corner straight pipe portion 211; the cladding layer corner portion 222 and the cladding layer end portion 223 are combined together in an eight-shaped structure and connected to the bottom of the cladding layer straight pipe portion 221. The inner corner corner portion 212 and the cladding layer corner portion 222 are in a corner structure, simulating the contact surface of the ultrasonic probe. By processing the second cladding layer 22, the slope, the inner corner and the like on the inner surface of the inner corner simulation test block 20, the shape of the inner surface of the inner corner area of the nozzle of the upper head of the stabilizer can be effectively simulated, the sound beam coverage effect of the ultrasonic probe can be tested, and the ultrasonic inspection result is more reliable.

[0052] In some embodiments, the outer diameter of the inner corner straight pipe portion 211 is 979 mm, the inner diameter of the inner corner corner portion 212 is 95 mm, the radius of the cladding layer straight pipe portion 221 is 189.8 mm, and the inner surface of the cladding layer corner portion 222 is R75mm-R80mm. Of course, in other embodiments, the size can also be set according to actual needs.

[0053] Continuing to refer to Figure 4, the crescent groove part 23 can include a first crescent groove 231, a second crescent groove 232 and a third crescent groove 233 in some embodiments, which are respectively formed through the surfacing layer straight pipe part 221, the surfacing layer corner part 222 and the surfacing layer end part 223 and extend to the inner fillet straight pipe part 211, the inner fillet corner part 212 and the inner fillet end part 213. In some embodiments, the thickness of the second surfacing layer 22 is a 5mm stainless steel surfacing layer. The radius of the first crescent groove 231, the second crescent groove 232 and the third crescent groove 233 is 19.1mm, and the depth is 7.3mm. It can be understood that, since the machining depth exceeds 5mm, the first crescent groove 231, the second crescent groove 232 and the third crescent groove 233 are also machined on the inner wall of the pipe body 21 by 2.3mm.

[0054] In some embodiments, the first crescent groove 231 is arranged opposite to the third crescent groove 233, and the first crescent groove 231, the second crescent groove 232 and the third crescent groove 233 are arranged staggered. The second crescent groove 232 is arranged at a position 90 degrees rotated from the first crescent groove 231 along the central axis of the pipe body 21. It can be understood that, the first crescent groove 231 is arranged on the inner fillet straight pipe part 211, and this position is defined as 0 degree; the second crescent groove 232 is arranged on the inner fillet corner part 221, and the second crescent groove 232 is rotated 90 degrees from the first crescent groove 231 along the central axis of the pipe body 21 as the center; the third crescent groove 233 is arranged on the inner fillet end part 223, and the third crescent groove 233 is rotated 180 degrees from the first crescent groove 231 along the central axis of the pipe body 21 as the center. Of course, in other embodiments, it can also be set according to actual needs. By machining the first crescent groove 231, the second crescent groove 232 and the third crescent groove 233 in the test block, the ultrasonic time-gain correction TCG curve and the scanning sensitivity calibration can be effectively carried out.

[0055] A detection method of an ultrasonic detection test block of a pressure stabilizer upper end head pipe nozzle, comprising the following steps: S1, after the time base information of the ultrasonic probe is calibrated, the probe is placed on the arc groove 134 of the TCG curve parameter test block 10;

[0056] S2, the ultrasonic probe is moved to find the echo amplitude of the highest signal in the first notch 131, the second notch 132 and the third notch 133, the gain of the instrument is adjusted so that the signal is located at 80%±5% of the full screen height of the instrument, and the adjusted gain value is recorded;

[0057] S3, the instrument settings are kept unchanged, the echo of other signals except the highest signal in the first notch 131, the second notch 132 and the third notch 133 is found, and the height thereof is also adjusted to 80%±5% of the full screen height of the instrument in turn, and the adjusted gain value is recorded at the same time;

[0058] S4, connecting each point in turn with the depth of the first notch 131, the second notch 132 and the third notch 133 as the horizontal coordinate to make a TCG curve;

[0059] S5, using the fillet simulation body test block 20 to verify the sensitivity of the TCG curve.

[0060] It can be understood that the above embodiments only express the preferred embodiments of the present application, which are described in detail and specifically, but cannot be understood as the limitation of the patent scope of the present application; it should be pointed out that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and several modifications and improvements can be made, which belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. An ultrasonic testing block for the nozzle of a voltage regulator cap, characterized in that, include: TCG curve reference test block (10), used to measure the morphology of the outer surface of the inner rounded corner area of ​​the end cap nozzle on the pressurizer of a nuclear power plant, and to test the coupling state of the ultrasonic probe, the TCG curve reference test block (10) includes a body (11), a first weld overlay layer (12) and a simulated groove part (13); the first weld overlay layer (12) is disposed on the body (11), and the simulated groove part (13) is disposed on the first weld overlay layer (12) and the body (11); The inner rounded corner simulation test block (20) is used to simulate the morphology of the inner surface of the inner rounded corner area of ​​the end cap nozzle on the pressurizer of a nuclear power plant. The inner rounded corner simulation test block (20) used to test the sound beam coverage effect of the ultrasonic probe includes a tube body (21), a second weld layer (22), and a crescent groove (23) for ultrasonic time-gain correction TCG curve and scanning sensitivity calibration. The second weld layer (22) is sleeved inside the tube body (21), and the crescent groove (23) is disposed on the second weld layer (22) and the tube body (21). The crescent-shaped portion (23) includes a first crescent-shaped portion (231), a second crescent-shaped portion (232), and a third crescent-shaped portion (233) that penetrate the second weld overlay layer (22) and extend to the tube body (21). The tube body (21) includes a straight tube section (211) with inner rounded corners, a corner section (212) with inner rounded corners, and a corner end section (213) connected in sequence. The second weld overlay (22) includes a weld overlay straight tube section (221), a weld overlay corner section (222), and a weld overlay end section (223) connected in sequence. The inner rounded corner straight pipe section (211), the inner rounded corner corner section (212), and the inner rounded corner end section (213) are respectively sleeved on the outside of the weld overlay straight pipe section (221), the weld overlay corner section (222), and the weld overlay end section (223); The first crescent groove (231), the second crescent groove (232) and the third crescent groove (233) are respectively opened through the straight pipe section (221), the corner section (222) and the end section (223) of the weld overlay layer and extend to the inner rounded corner straight pipe section (211), the inner rounded corner section (212) and the inner rounded corner end section (213).

2. The ultrasonic testing block for the upper end cap nozzle of the voltage regulator according to claim 1, characterized in that, The simulated groove section (13) includes a first groove (131), a second groove (132), a third groove (133), and an arc groove (134). The first groove (131), the second groove (132) and the third groove (133) are all formed through the first weld overlay layer (12) and extend to the body (11). The arc groove (134) is formed on the upper surface of the body (11) and the first weld overlay layer (12).

3. The ultrasonic testing block for the nozzle of the voltage regulator upper end cap according to claim 2, characterized in that, The first weld overlay (12) includes a left weld layer (121) and a right weld layer (122) respectively disposed on two opposite sides of the body (11). The first groove (131) and the second groove (132) are both formed through the left solder layer (121) and extend to the body (11); The third groove (133) is formed through the right weld layer (122) and extends to the body (11).

4. The ultrasonic testing block for the nozzle of the voltage regulator upper end cap according to claim 3, characterized in that, The first crescent groove (231) is arranged opposite to the third crescent groove (233), and the second crescent groove (232) is located at the first crescent groove (231) rotated 90 degrees about the central axis of the tube body (21).

5. The ultrasonic testing block for the nozzle of the voltage regulator upper end cap according to claim 2, characterized in that, The center line of the first groove (131) and the center line of the second groove (132) form an angle of 29°.

6. The ultrasonic testing block for the nozzle of the voltage regulator upper end cap according to claim 2, characterized in that, The first groove (131), the second groove (132) and the third groove (133) each include at least one groove body.

7. A method for testing an ultrasonic testing block for a voltage regulator's upper end cap nozzle, as described in any one of claims 2-6, characterized in that... The steps include: S1, after the ultrasonic probe is calibrated for time base information, the probe is placed on the arc groove (134) of the TCG curve reference block (10); S2, move the ultrasonic probe to find the highest echo amplitude among the first groove (131), the second groove (132) and the third groove (133), adjust the instrument gain so that the signal is located at 80%±5% of the full screen height of the instrument, and record the adjusted gain value. S3, keeping the instrument settings unchanged, find the signal echoes other than the highest signal in the first groove (131), the second groove (132) and the third groove (133), and adjust their heights to 80%±5% of the full screen height of the instrument, while recording the adjusted gain values. S4. Using the horizontal axis as the depth of the first groove (131), the second groove (132), and the third groove (133), connect the points in sequence to create a TCG curve; S5, the sensitivity of the TCG curve is verified using the first crescent (231), the second crescent (232) and the third crescent (233) of the inner rounded corner simulation block (20).

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