CN203232007U - Ultrasonic flaw detection test block for willow hole fork-shaped leaf root with seam - Google Patents

Ultrasonic flaw detection test block for willow hole fork-shaped leaf root with seam Download PDF

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Publication number
CN203232007U
CN203232007U CN 201320212533 CN201320212533U CN203232007U CN 203232007 U CN203232007 U CN 203232007U CN 201320212533 CN201320212533 CN 201320212533 CN 201320212533 U CN201320212533 U CN 201320212533U CN 203232007 U CN203232007 U CN 203232007U
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test block
wire cutting
round hole
cutting slot
circular hole
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Expired - Fee Related
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CN 201320212533
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Chinese (zh)
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文黎
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State Grid Corp of China SGCC
Tianjin Electric Power Corp
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State Grid Corp of China SGCC
Tianjin Electric Power Corp
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Abstract

The utility model relates to a special ultrasonic flaw detection test block for a perforation rivet multifork root. The test block comprises a 20# steel test block, a left round hole, a right round hole, a first wire cutting slot, a second wire cutting slot, a third wire cutting slot and a fourth wire cutting slot, wherein the length, width and height of the 20# steel test block are 80mm, 60mm and 10mm respectively; the left round hole vertically penetrates through the surface of the test block, and the center is 25mm away from the left edge of the test block and 18mm away from the upper edge of the test block; the right round hole is symmetric to the axis of the left round hole test block; the first wire cutting slot and the second wire cutting slot are formed on the two sides from left to right on the horizontal center line of the left round hole; the third wire cutting slot and the fourth wire cutting slot are formed on the two sides from left to right on the horizontal center line of the right round hole; the length of the first, the second, the third and the fourth wire cutting slots is 0.5mm respectively; the diameter of the left round hole and the right round hole is (phi)16mm respectively; the widths of the first, the second, the third and the fourth wire cutting slots is 0.4mm, 0.6mm, 0.8mm and 1.0mm respectively. The utility model provides an ultrasonic test block suitable for field detection of a perforation rivet multifork root for the generating set of 200MW and below of a power system, the detection quality is guaranteed, and the potential safety hazard is eliminated for safe operation of a power plant.

Description

骑缝柳孔叉型叶根专用超声波探伤试块Ultrasonic flaw detection test block for willow hole fork-shaped leaf root with seam

技术领域technical field

本实用新型属于电力设备制造加工系统技术领域,尤其是一种骑缝柳孔叉型叶根专用超声波探伤试块。The utility model belongs to the technical field of electric power equipment manufacturing and processing systems, in particular to a special ultrasonic flaw detection test block for a willow-hole fork type blade root riding on a seam.

背景技术Background technique

叶片是发电机组中汽轮机的重要部件,常因叶根发生断裂事故严重威胁汽轮机安全运行,因此通过各种无损检测方法对叶片及时进行预防性检查是非常重要的,也是发电机组金属监督检查的主要检测项目之一。The blade is an important part of the steam turbine in the generator set. The fracture accident of the blade root often seriously threatens the safe operation of the steam turbine. Therefore, it is very important to carry out preventive inspection of the blade in time through various non-destructive testing methods, and it is also the main element of the metal supervision and inspection of the generator set. One of the testing items.

目前的200MW及以下发电机组的汽轮机叶片容易发生事故的部位为末级及次末级,如图1所示,包括叶轮1、叶根2及叶片3,它们的根部主要是骑缝柳孔叉型叶根,如图2所示,叶根处经常出现损伤,这样检查人员就必须在探点4处进行检测探伤,但由于现场检测的条件复杂,因此必须采用对比试块来保证超声检测的准确度。The accident-prone parts of the steam turbine blades of the current 200MW and below generator sets are the final stage and the second final stage, as shown in Figure 1, including impeller 1, blade root 2 and blade 3, and their roots are mainly fork-shaped willow holes. Blade root, as shown in Figure 2, is often damaged at the blade root, so inspectors must conduct flaw detection at detection point 4. However, due to the complicated conditions of on-site detection, a comparison test block must be used to ensure the accuracy of ultrasonic detection Spend.

发明内容Contents of the invention

本实用新型的目的在于克服现有技术的不足,提供一种骑缝柳孔叉型叶根专用超声波探伤试块。The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a special ultrasonic flaw detection test block for the willow-hole fork-shaped blade root.

本实用新型解决其技术问题是采取以下技术方案实现的:The utility model solves its technical problem and realizes by taking the following technical solutions:

一种骑缝柳孔叉型叶根专用超声波探伤试块,其特征在于:该试块包括长×宽×高为80mm×60mm×10mm的20号钢试块、垂直穿透试块表面,圆心距试块左边缘25mm,距试块上边缘18mm的左圆孔、与左圆孔试块中轴对称的右圆孔、在左圆孔水平中心线由左至右两侧制出的第一线切割槽和第二线切割槽、在右圆孔水平中心线由左至右两侧制出的第三线切割槽及第四线切割槽,所述第一至第四线切割槽的长度均为0.5mm。A special ultrasonic flaw detection test block for willow-hole fork-shaped blade root riding on a seam, which is characterized in that: the test block includes a No. 20 steel test block with a length × width × height of 80 mm × 60 mm × 10 mm, a vertical penetration test block surface, and a center distance of The left edge of the test block is 25mm, the left circular hole 18mm from the upper edge of the test block, the right circular hole symmetrical to the center axis of the left circular hole test block, and the first line drawn from left to right on the horizontal centerline of the left circular hole The cutting groove and the second line cutting groove, the third line cutting groove and the fourth line cutting groove made on the horizontal centerline of the right circular hole from left to right, the lengths of the first to fourth line cutting grooves are all 0.5 mm.

而且,所述左圆孔及右圆孔的直径均为φ16mm。Moreover, the diameters of the left circular hole and the right circular hole are both φ16mm.

而且,所述由第一至第四线切割槽的宽度分别为0.4mm、0.6mm、0.8mm、1.0mm。Moreover, the widths of the grooves cut by the first to fourth lines are respectively 0.4 mm, 0.6 mm, 0.8 mm, and 1.0 mm.

本实用新型的优点和积极效果是:Advantage and positive effect of the present utility model are:

1、本实用新型针对电力系统200MW及以下发电机组,发明了适合于现场检测骑缝柳孔叉型叶根的超声波试块,保证了检测质量,为电厂的安全运行消除了安全隐患。1. The utility model is aimed at generating sets of 200MW and below in the power system, and invents an ultrasonic test block suitable for on-site detection of willow-hole fork-shaped blade roots, which ensures the quality of the detection and eliminates potential safety hazards for the safe operation of the power plant.

2、本实用新型构思巧妙,结构简单,便于应用推广。2. The utility model has ingenious conception, simple structure and is convenient for application and popularization.

附图说明Description of drawings

图1是目前发电机组的汽轮机叶片的结构示意图;Fig. 1 is a structural schematic diagram of a steam turbine blade of a current generating set;

图2是图1的俯视图;Fig. 2 is the top view of Fig. 1;

图3是本实用新型的结构视图。Fig. 3 is a structural view of the utility model.

具体实施方式Detailed ways

以下结合附图对本实用新型实施例做进一步详述,以下实施例只是描述性的,不是限定性的,不能以此限定本实用新型的保护范围。The embodiments of the present utility model will be described in further detail below in conjunction with the accompanying drawings. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present utility model.

一种骑缝柳孔叉型叶根专用超声波探伤试块,如图3所示,该试块包括长×宽×高为80mm×60mm×10mm的20号钢试块1、垂直穿透试块表面,圆心距试块左边缘25mm,距试块上边缘18mm的左圆孔3、与左圆孔试块中轴对称的右圆孔6、在左圆孔水平中心线由左至右两侧制出的第一线切割槽2和第二线切割槽4、在右圆孔水平中心线由左至右两侧制出的第三线切割槽5及第四线切割槽7,所述第一至第四线切割槽的长度均为0.5mm。A special ultrasonic flaw detection test block for willow-hole fork-shaped leaf root riding on the seam, as shown in Figure 3, the test block includes a No. 20 steel test block with a length × width × height of 80 mm × 60 mm × 10 mm 1. Vertically penetrate the surface of the test block , the center of the circle is 25mm from the left edge of the test block, and the left circular hole is 18mm from the upper edge of the test block. The first wire-cutting groove 2 and the second wire-cutting groove 4, the third wire-cutting groove 5 and the fourth wire-cutting groove 7 made on the horizontal center line of the right circular hole from left to right, the first to the second The lengths of the four-wire cutting grooves are all 0.5mm.

在本实用新型的具体实施中,所述左圆孔及右圆孔的直径均为φ16mm。In the specific implementation of the utility model, the diameters of the left circular hole and the right circular hole are both φ16mm.

在本实用新型的具体实施中,所述由第一至第四线切割槽的宽度分别为0.4mm、0.6mm、0.8mm、1.0mm。In the specific implementation of the present utility model, the widths of the grooves cut by the first to fourth lines are respectively 0.4 mm, 0.6 mm, 0.8 mm, and 1.0 mm.

应用原理application principle

当使用探头对缝柳孔叉型叶根部进行扫查缺陷时,随着缝柳孔叉型叶根部缺陷深度的不同,扫描探头信号也发生变化。当检测缝柳孔叉型叶根部发现缺陷时,利用扫描探头的实际检测结果对比检测专用试块,根据检测专用试块上模拟叶根销孔部左圆孔及右圆孔旁边的对应线切割槽的宽度,可以大致确定实际检测缺陷的位置及宽度。When the probe is used to scan for defects at the root of the fork-shaped leaf with slotted willow holes, the signal of the scanning probe changes with the depth of the defect at the root of the forked leaf with slotted willow holes. When defects are found at the fork-shaped leaf root of the inspection seam, use the actual detection results of the scanning probe to compare with the special test block for detection, and cut according to the corresponding lines next to the left round hole and the right round hole of the simulated leaf root pin hole on the special test block The width of the groove can roughly determine the position and width of the actual detection defect.

Claims (3)

1. special-purpose UT (Ultrasonic Testing) test block of junction of the edges of two sheets of paper willow hole multifork root, it is characterized in that: this test block comprises that long * wide * height is No. 20 steel test blocks of 80mm * 60mm * 10mm, vertically penetrate the test block surface, distance of center circle test block left hand edge 25mm, left circular hole apart from test block coboundary 18mm, with axisymmetric right circular hole in the left circular hole test block, at the left circular hole horizontal center line first line cutting groove and the second line cutting groove made of both sides from left to right, at right circular hole horizontal center line the 3rd line cutting groove and the 4th line cutting groove made of both sides from left to right, the length of described first to fourth line cutting groove is 0.5mm.
2. the special-purpose UT (Ultrasonic Testing) test block of junction of the edges of two sheets of paper willow hole multifork root according to claim 1, it is characterized in that: the diameter of described left circular hole and right circular hole is φ 16mm.
3. the special-purpose UT (Ultrasonic Testing) test block of junction of the edges of two sheets of paper willow hole multifork root according to claim 1, it is characterized in that: described width by first to fourth line cutting groove is respectively 0.4mm, 0.6mm, 0.8mm, 1.0mm.
CN 201320212533 2013-04-24 2013-04-24 Ultrasonic flaw detection test block for willow hole fork-shaped leaf root with seam Expired - Fee Related CN203232007U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109696473A (en) * 2018-03-12 2019-04-30 中电华创(苏州)电力技术研究有限公司 A kind of steam turbine blade root phased array supersonic flaw detection reference block
CN109696485A (en) * 2018-08-20 2019-04-30 中电华创电力技术研究有限公司 A kind of steam turbine multifork root phased array supersonic flaw detection debugging test block
CN109696484A (en) * 2018-03-12 2019-04-30 中电华创电力技术研究有限公司 A kind of steam turbine blade root phased array supersonic flaw detection calibration block

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109696473A (en) * 2018-03-12 2019-04-30 中电华创(苏州)电力技术研究有限公司 A kind of steam turbine blade root phased array supersonic flaw detection reference block
CN109696484A (en) * 2018-03-12 2019-04-30 中电华创电力技术研究有限公司 A kind of steam turbine blade root phased array supersonic flaw detection calibration block
CN109696484B (en) * 2018-03-12 2023-12-12 中电华创电力技术研究有限公司 Phased array ultrasonic flaw detection calibration test block for turbine blade root
CN109696485A (en) * 2018-08-20 2019-04-30 中电华创电力技术研究有限公司 A kind of steam turbine multifork root phased array supersonic flaw detection debugging test block
CN109696485B (en) * 2018-08-20 2024-06-25 中电华创电力技术研究有限公司 Phased array ultrasonic flaw detection debugging test block for fork-shaped blade root of steam turbine

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131009

Termination date: 20190424