CN201215549Y

CN201215549Y - Angle indicating device for directed X ray flaw detection machine

Info

Publication number: CN201215549Y
Application number: CNU2008200469669U
Authority: CN
Inventors: 唐化山
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-28
Filing date: 2008-04-28
Publication date: 2009-04-01
Anticipated expiration: 2018-04-28

Abstract

The utility model relates to an angle indicator of a directional X-ray detecting machine, comprising a gravity indicator arranged on an X-ray radiation light source casing of the detecting machine, wherein the gravity indicator comprises a dial plate and a gravity pointer, the center of the gravity pointer is laminated with the focus point of the X-ray beam. When obliquely radiating welding seams, the dial plate rotates along with the window, the gravity pointer points downwards vertically, and the index pointed by the pointer is the radiation angle of the X-ray. The radiation angle can be controlled to confirm the image opening clearance of the welding seams, improving the default detection rate of the welding seams, and the image definition, the opening clearance and the density uniformity of the film are better than other methods. The angle indicator of a directional X-ray detecting machine has flexible and simple use, can reduce the errors caused by measuring the window angle by naked eyes and band tapes, can reduce the in-site measurement time, can improve production efficiency and can guarantee the image quality after radiating the film by rays since the exposure parameters are easy to quantify, and has wide application and flexible field operation.

Description

A kind of directed x-ray flaw detector angle indicating device

Technical field

The utility model relates to station boiler nondestructiving inspecting equipment field, specifically is a kind of x-ray flaw detector angle indicating device to station boiler " four pipes " transillumination or other field pipe weld transillumination.

Background technology

Electric boiler " four pipe " is that economizer tube, water screen tube, reheater tube and superheater tube have that wall is thin, caliber is little, bears the influence of High Temperature High Pressure and load variations simultaneously, its work under bad environment.The assembling welding of " four pipes " is all carried out usually on construction ground, be subjected to the influence of environment, welding material and welder technology level and welding technology, may occur pore, slag inclusion in the welding joint, merge, weld defects such as lack of penetration and crackle, the existence of defective has a strong impact on the safe operation of boiler.Interrelated data shows that the pipe explosion accident overwhelming majority of boiler " four pipes " is caused that by weld defect therefore, finding and eliminating weld defects is the main task of small diameter tube radiographic inspection.At present, relevant inspection procedure requires the X-ray transillumination of small diameter tube to adopt double-walled slur-oval transillumination.Small diameter tube adopts oval transillumination to make a pipe become transillumination one time by in the past repeatedly transillumination, thereby shortening round of visits, reduce and check cost, but still there is following shortcoming in this transillumination method: 1, the sensitivity of film thickness difference increases, and the thickness that ray penetrates during the small diameter tube transillumination alters a great deal from middle mind-set two ends; 2,, make and the geometry image fog of ray size reduce contrast simultaneously owing to penetrate former side weld and differ a pipe diameter than the distance that film side weld leaves film.What 3, oval transillumination adopted is the inclination transillumination, certainly will make the weld defect image produce distortion like this, makes and comments sheet to analyze difficulty.Because there is certain relation in the recall rate of sensitivity of film angle and crackle, therefore must control the angle of ray by control oval opening gap.Studies show that, under the certain situation of pipe diameter, theoretical focal length, weld width, it is big that the transillumination angle becomes along with the increase of opened gap, diminish along with the minimizing of opened gap, by increasing or reduce the opened gap that the transillumination angle just can be adjusted the weld seam image, therefore the control of opened gap is only relevant with the transillumination angle, can control the purpose of opened gap by control transillumination angle.For the different pipe of caliber, reach identical opened gap transillumination angle also need not, also promptly require x-ray flaw detector rotational angle difference.Up to the present, domestic and international existing directed x-ray flaw detector does not all have angle indicating device.The oval transillumination of small diameter tube relies on flaw detection personnel observation, tape measure with the naked eye by rule of thumb to come estimating window bicker degree usually at present, opened gap can not be accomplished to quantize, so not only can produce than mistake, and prolong the preliminary work time, labour productivity is low, makes the quality of sensitivity of film egative film be difficult to be guaranteed simultaneously.

Summary of the invention

The purpose of this utility model is at above-mentioned existing problems and deficiency, thus provide a kind of simple in structure, easy to use, reach the x-ray flaw detector angle indicating device that control opened gap purpose obtains effective weld seam transillumination image by accurate control transillumination angle.

The technical solution of the utility model is achieved in that a kind of directed x-ray flaw detector angle indicating device, comprise the gravity index gauge that is arranged on the defectoscope x-ray bombardment light source outer cover, the gravity index gauge comprises index dial and device at the gravity pointer free to rotate at index dial center, and the center of gravity index gauge overlaps with X ray electron gun focus.

The gravity index gauge can be installed in a plurality of positions on the defectoscope x-ray bombardment light source outer cover, can install on the side fan guard of defectoscope as the gravity index gauge, also can install on illumination window or is installed in other position.

The structure of gravity pointer is " T " or " 1 " font pointer." T " font pointer comprises that the horizontal pointer that remains horizontal direction reaches and remain the vertical needle of vertical direction.For the handled easily person accurately judges the transillumination angle, index dial high scale scope is 0 °-45 °.

For preventing that the gravity index gauge in use is subjected to damage, the gravity index gauge is provided with the organic glass gland bonnet.

The gravity index gauge is installed in various ways on the x-ray flaw detector.It can be to be bonded on the defectoscope radiation exposure window side end face fan guard by tackifier, also can be by being bolted on the defectoscope radiation exposure window side end face fan guard.

The utility model is provided with the gravity index gauge owing to having adopted on defectoscope x-ray bombardment light source outer cover, the structure that the center of gravity index gauge overlaps with X ray electron gun focus, when illumination window butt welded seam inclination transillumination, the gravity pointer under the effect of gravity all the time vertically downward, the X-ray machine window rotates, index dial is also along with window rotates. and pointer is made the rotation of certain angle with respect to index dial, and the scale on the pointer indication index dial is exactly the angle of X ray transillumination.The utility model gravity index gauge can be used for field test, by controlling the transillumination angle to reach the purpose that guarantees weld seam image opened gap, can improve the recall rate of weld defect, its testing result still is that the homogeneity of opened gap, egative film global density all is better than the check that other method is carried out from the sharpness of egative film image quality.Use that the gravity index gauge has flexibly, characteristics easily, can reduce the error of field staff, reduce the in-site measurement activity duration simultaneously, raise labour productivity greatly by naked-eye observation, tape measure window angle.Exposure parameter is easy to quantize, and the sensitivity of film negative quality is effectively guaranteed easily.The utility model simple and ingenious structure, low cost of manufacture has the dirigibility of generalization and execute-in-place.

Below in conjunction with accompanying drawing the utility model is further described.

Description of drawings

Fig. 1 is that the utility model gravity index gauge is installed in the structural representation on the side fan guard.

Embodiment

The utility model is a kind of directed x-ray flaw detector angle indicating device, comprise the gravity index gauge 3 that is arranged on the defectoscope x-ray bombardment light source outer cover, gravity index gauge 3 comprises index dial 31 and device at the gravity pointer 32 free to rotate at index dial 31 centers, and the center of gravity index gauge 3 overlaps with X ray electron gun focus.Gravity index gauge 3 can be installed in a plurality of positions on the defectoscope x-ray bombardment light source outer cover, can install on the side fan guard 2 of defectoscope as the gravity index gauge, also can install on illumination window or is installed in other position.As shown in Figure 1, the utility model preferred embodiment gravity index gauge 3 is installed on the X-ray machine end radiation exposure window side end face fan guard 2, and X-ray production apparatus window 1 is vertically downward the time, and gravity pointer 32 is designated as 0 °; During the X-ray production apparatus horizontal positioned, pointer is downward all the time.The rotational angle of X-ray production apparatus window 1 shows by level or the vertical needle index dial 31 from gravity index gauge 3.

The utility model gravity pointer 32 is " T " or " 1 " font pointer, and " T " font pointer comprises that the horizontal pointer that remains horizontal direction reaches and remain the vertical needle of vertical direction.For the handled easily person accurately judges the transillumination angle, index dial 31 high scale scopes are 0 °-45 °.As shown in Figure 1, be 0 ° with minimum point, be 15 °, 30 °, 45 °, 30 °, 15 °, 0 ° of unit mark with per 15 ° respectively to both sides again.Can accurately embody per 1 ° scale on the index dial 31.

Gravity index gauge 3 is provided with the organic glass gland bonnet, to prevent that effectively the gravity index gauge in use is subjected to external force collision and damages the inaccurate phenomenon of appearance.Because in light weight, gravity index gauge 3 can be to be bonded on the defectoscope radiation exposure window 1 side end face fan guard 2 by tackifier, also can be to be installed on the defectoscope radiation exposure window 1 side end face fan guard 2 by bolt.It can also be other connected mode.

The utility model is described with reference to specific embodiment, but this description and not meaning that is construed as limiting the utility model.With reference to description of the present utility model, other of the disclosed embodiments changes, and these improvement can expect all that for those skilled in the art therefore such variation should belong in the affiliated claim institute restricted portion.

Claims

1, a kind of directed x-ray flaw detector angle indicating device, it is characterized in that: comprise the gravity index gauge (3) that is arranged on the defectoscope x-ray bombardment light source outer cover, described gravity index gauge (3) comprises index dial (31) and device at the gravity pointer (32) free to rotate at index dial (31) center, and the center of described gravity index gauge (3) overlaps with X ray electron gun focus.

2, angle indicating device according to claim 1 is characterized in that: above-mentioned gravity index gauge (3) installs on the side fan guard (2) of defectoscope.

3, angle indicating device according to claim 1 is characterized in that: above-mentioned gravity index gauge (3) installs on the illumination window (1) of defectoscope.

4, angle indicating device according to claim 1, it is characterized in that: above-mentioned gravity pointer (32) is " T " font pointer, and described " T " font pointer comprises that the horizontal pointer that remains horizontal direction reaches and remain the vertical needle of vertical direction.

5, angle indicating device according to claim 1 is characterized in that: above-mentioned gravity pointer (32) is " 1 " font pointer.

6, angle indicating device according to claim 1 is characterized in that: above-mentioned index dial (31) high scale scope is 0 °-45 °.

7, according to claim 1 or 2 or 3 described angle indicating devices, it is characterized in that: above-mentioned gravity index gauge (3) is provided with the organic glass gland bonnet.

8, according to claim 1 or 2 or 3 described angle indicating devices, it is characterized in that: above-mentioned gravity index gauge (3) by tackifier be bolted to that defectoscope side fan guard (2) is gone up or illumination window (1) on.