CN202351189U - Portable intermediate frequency X-ray flaw detector - Google Patents

Abstract

The utility model discloses a portable intermediate frequency X-ray flaw detector. A pulse width-controllable signal source which can generate 500 Hz frequency is constructed by adopting a pulse width modulation (PWM) technology; a pulse high-voltage transformer is driven by a power source with the frequency of 500 Hz and controllable amplitude and pulse width; then, the high voltage output from the pulse high-voltage transformer serves as the tube voltage of an X-ray tube, so that the X-ray tube obtains the tube voltage of which the frequency is 3.5 times higher than that of the existing frequency-modulation pulse high voltage portable X-ray flaw detector; and therefore, relatively continuous and high-efficiency X rays with stable energy can be obtained, and the penetrating power of the portable intermediate frequency X-ray flaw detector is improved by 25 percent compared with the frequency-modulation flaw detector with the same power in the same detection application range. The portable intermediate frequency X-ray flaw detector also can serve as a ray source for real-time imaging; and the imaging effect is good. Because the rays generated by the portable intermediate frequency X-ray flaw detector are relatively continuous, the energy is stable, and the penetrating power is high. Therefore, the formed negative film is good in resolution and high in sensitivity. The negative film is used for shooting operation; the transmission thickness of the negative film can be improved by over 25 percent compared with that in the mode of obtaining the X-rays by the frequency-modulation pulse high voltage; and moreover, the resolution is high.

Description

Portable intermediate frequency x-ray flaw detector

Technical field

The utility model relates to the general checkout equipment in a kind of Non-Destructive Testing field, relates in particular to a kind of portable intermediate frequency x-ray flaw detector that is applicable to the pulse width modulated high pressure of any site work.

Background technology

The Portable X-ray defectoscope is used very extensive in the Non-Destructive Testing field; The tube voltage of the Portable X-ray defectoscope of domestic and international market is frequency modulation on pulse high pressure mode at present, and the X ray pulsed frequency that is produced in such a way is low, and the pulsed frequency that per second was produced in the time is merely 150Hz; And then the radiographic density that produces in the unit interval is little; Therefore, when film making makes public in the unit interval, much smaller relatively with the thickness of constant power penetrator body.The ray frequency that is produced because of the frequency modulation on pulse high pressure again is low, and it is little to detect the workpiece scope, can't thicker object be detected, and therefore, its service efficiency is low, and the user need purchase the type of different capacity, satisfies the needs that detect, and acquisition cost is high.Energy dissipation is big, is unfavorable for that enterprise reduces cost, and does not more meet the theory of current energy-saving and emission-reduction.

Summary of the invention

To the defective that existing frequency conversion Portable X-ray defectoscope exists, the utility model provides a kind of portable intermediate frequency x-ray flaw detector of pulse width modulated high pressure.

Solving the problems of the technologies described above the concrete technical measures of being taked is:

A kind of portable intermediate frequency x-ray flaw detector; Comprise: controller 1 and through low pressure stube cable 2 connected x ray generators 3; It is characterized in that: the pulse width modulated driving circuit that described controller 1 employing frequency is 500Hz is final output terminal; Physical circuit is following: the alternating current 220V power input connects rectifier bridge D through power switch S1, and rectifier bridge D connects first filtering circuit of being made up of L1, C1, and first filtering circuit connects insulated gate bipolar power tube Q1; Insulated gate bipolar power tube Q1 connects second filtering circuit of being made up of L2, C3, C4; Second filtering circuit connects the single-tube contravariant circuit of being made up of insulated gate bipolar power tube Q2, and the single-tube contravariant circuit connects pulsed high-voltage transformer T1, and pulsed high-voltage transformer T1 connects X-ray pipe 6; Described x ray generator 3 is made up of cable connector 4, pulsed high-voltage transformer 5 and X-ray pipe 6; Wherein, Pulsed high-voltage transformer 5, low-voltage cable connector 4 are installed on the upper head plate of x ray generator 3, and X-ray pipe 6 is installed on the bottom end plate of x ray generator 3; Single-tube contravariant circuit in the controller 1 is connected with cable connector 4 in the x ray generator 3 through low pressure stube cable 2; The 500Hz that cable connector 4 provides controller 1 transfers the wide major loop pulse power to be connected with the elementary of pulsed high-voltage transformer T1; Secondary and the X-ray pipe 6 of pulsed high-voltage transformer T1 is connected, and the Filament Winding on T1 level of pulsed high-voltage transformer is connected with the filament of X-ray pipe 6.

The good effect of the utility model: little to the existing existing X ray frequency that obtains with frequency modulation method of frequency modulation on pulse high pressure Portable X-ray defectoscope X-ray density low, that the unit interval produces; The problem of transillumination power difference; The utility model adopts PWM to transfer wide technology to build one can produce 500Hz and the controlled signal source of pulsewidth; Utilize frequency to be 500Hz, all controlled power supply of amplitude and pulsewidth comes the driving pulse high-tension transformer, then with the high pressure of the pulsed high-voltage transformer output tube voltage as the X-ray pipe; Make the X-ray pipe obtain a tube voltage high 3.5 times than the frequency modulation type frequency; Thereby obtain one relatively continuously, the X ray of efficient, energy stabilization, make the detection range of application of portable intermediate frequency x-ray flaw detector, improve 25% than penetration power with constant power frequency modulation defectoscope.The utility model also can be used as the radiographic source of real time imagery, and imaging effect also can reach satisfied effect.Because the ray of its generation is continuous relatively and energy stabilization, transillumination power is strong, therefore, uses the utility model to detect formed egative film good resolution, and is highly sensitive.Promptly be used in the film making operation, with same kV value, same time shutter, the mode penetration thickness that the comparable frequency modulation on pulse high pressure of its penetration thickness obtains X ray improves more than 25%, and resolution is high.The utility model is compared with the portable defectoscope of frequency modulation on pulse high pressure has in essence different, is a kind of product of brand new ideas in the Non-Destructive Testing field, and promptly the utility model frequency of operation is 500Hz adjusts defectoscope through the method for adjustment pulsewidth a output power; And the frequency modulation type realizes that through the adjustment frequency of operation therefore, the frequency of operation of frequency modulation machine can only be between 100-150Hz.The utility model is applicable to Non-Destructive Testing All Jobs place, and application prospect is boundless.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the circuit theory diagrams of the utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is further specified.Structure of the utility model and circuit theory such as Fig. 1, shown in Figure 2; The utility model constitutes by controller 1 with through low pressure stube cable 2 connected x ray generators 3, and wherein, controller 1 employing frequency of operation is that the pulse width modulated driving circuit of 500Hz is final output terminal; Physical circuit is following: the alternating current 220V power input connects rectifier bridge D through power switch S1; Rectifier bridge D connects first filtering circuit of being made up of L1, C1, and first filtering circuit connects insulated gate bipolar power tube Q1, after the first filtering circuit filtering; Q1 carries out pressure regulation through the insulated gate bipolar power tube; Connect second filtering circuit of being made up of L2, C3, C4 then and carry out filtering, thereby obtain a needed level and smooth DC voltage, this DC voltage is connected with the single-tube contravariant circuit of being made up of insulated gate bipolar power tube Q2; The single-tube contravariant circuit connects pulsed high-voltage transformer T1, and pulsed high-voltage transformer T1 connects X-ray pipe 6; X ray generator 3 is made up of cable connector 4, pulsed high-voltage transformer 5 and X-ray pipe 6, and wherein, pulsed high-voltage transformer 5, low-voltage cable connector 4 are installed on the upper head plate of x ray generator 3, and X-ray pipe 5 is installed on the bottom end plate of x ray generator 3; Single-tube contravariant circuit in the controller 1 is connected with cable connector 4 in the x ray generator 3 through low pressure stube cable 2, and the 500Hz that cable connector 4 provides controller 1 transfers the wide major loop pulse power to be connected with the elementary of pulsed high-voltage transformer T1.That is: the 500Hz that through cable connector 4 controller 1 is provided transfers the wide major loop pulse power to be transported to the elementary of pulsed high-voltage transformer T1; Secondary and the X-ray pipe 6 of pulsed high-voltage transformer T1 is connected, and the secondary Filament Winding of high-tension transformer is connected with the filament of X-ray pipe 6.In the utility model, X-ray pipe 6 adopts 250kv ripple ceramic X-ray pipe.

During the utility model work; Closed power switch S1, the alternating current 220V power supply gets into rectifier bridge D, carries out filtering through first filtering circuit of being made up of L1, C1 after the rectification; Obtain the direct current about 300V at the C1 two ends; Use by PWM and transfer wide technology control insulated gate bipolar power tube Q1 to carry out pressure regulation, second filtering circuit of forming via L2, C3, C4 again carries out filtering, obtains the more level and smooth controllable DC voltage of magnitude of voltage on demand at C3, C4 two ends.The direct current at C3, C4 two ends single-tube contravariant circuit through forming by Q2 insulated gate bipolar power tube, with direct current convert to frequency be 500Hz have pulsewidth controlled pulse signal come driving pulse high-tension transformer T1.The single-tube contravariant circuit is the source driving signal control of 500Hz by frequency, and the working method of single-tube contravariant circuit is, when insulated gate bipolar power tube Q2 by by the end of conducting; Again by be conducting to by the time; The secondary of pulsed high-voltage transformer T1 can produce the controlled high-voltage pulse of pulsewidth, and resulting high-voltage pulse is transported on the X-ray pipe 6, the plus earth of high-voltage pulse; Negative pole connects the negative electrode of X-ray pipe 6, the plus earth of X-ray pipe 6.The filament of X-ray pipe 6 is connected with the secondary Filament Winding of high-tension transformer T1.At this moment, X-ray pipe 6 will come by the more stable ray of produce power.

Claims (1)

1. portable intermediate frequency x-ray flaw detector; Comprise: controller (1) and through the connected x ray generator of low pressure stube cable (2) (3); It is characterized in that: described controller (1) employing frequency is that the pulse width modulated driving circuit of 500Hz is final output terminal; Physical circuit is following: the alternating current 220V power input connects rectifier bridge D through power switch S1, and rectifier bridge D connects first filtering circuit of being made up of L1, C1, and first filtering circuit connects insulated gate bipolar power tube Q1; Insulated gate bipolar power tube Q1 connects second filtering circuit of being made up of L2, C3, C4; Second filtering circuit connects the single-tube contravariant circuit of being made up of insulated gate bipolar power tube Q2, and the single-tube contravariant circuit connects pulsed high-voltage transformer T1, and pulsed high-voltage transformer T1 connects X-ray pipe (6); Described x ray generator (3) is made up of cable connector (4), pulsed high-voltage transformer (5) and X-ray pipe (6); Wherein, Pulsed high-voltage transformer (5), low-voltage cable connector (4) are installed on the upper head plate of x ray generator (3), and X-ray pipe (6) is installed on the bottom end plate of x ray generator (3); Single-tube contravariant circuit in the controller (1) is connected with cable connector (4) in the x ray generator (3) through low pressure stube cable (2); The 500Hz that cable connector (4) provides controller (1) transfers the wide major loop pulse power to be connected with the elementary of pulsed high-voltage transformer T1; Secondary and the X-ray pipe (6) of pulsed high-voltage transformer T1 is connected, and the Filament Winding on T1 level of pulsed high-voltage transformer is connected with the filament of X-ray pipe (6).

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