阅读说明：本技术 一种轻量化低压供电的x射线发生装置 (X-ray generating device of lightweight low voltage power supply ) 是由 李德来 苏树钿 刘庚辛 陈英怀 陈图森 于 2020-05-21 设计创作，主要内容包括：本发明涉及X射线检测技术领域,尤其涉及一种轻量化低压供电的X射线发生装置。一种轻量化低压供电的X射线发生装置,包括供电电路、X射线球管、灯丝变压器和油箱,供电电路包括控制电路、DC-AC逆变电路、升压变压器、第一AC-DC转换电路和第二AC-DC转换电路,控制电路驱动连接DC-AC逆变电路,DC-AC逆变电路连接外部电源并输出连接至升压变压器,第一AC-DC转换电路和第二AC-DC转换电路为功能互相对称的电路且并联连接至升压变压器的输出端；X射线球管连接在第一AC-DC转换电路的输出端和第二AC-DC转换电路的输出端之间。通过采用一个升压变压器同时连接两个互相对称的AC-DC转换电路对X射线球管进行供电,可以省去一个变压器,减轻设备的重量。(The invention relates to the technical field of X-ray detection, in particular to an X-ray generating device with light weight and low voltage power supply. A light-weight low-voltage power supply X-ray generating device comprises a power supply circuit, an X-ray bulb tube, a filament transformer and an oil tank, wherein the power supply circuit comprises a control circuit, a DC-AC inverter circuit, a step-up transformer, a first AC-DC conversion circuit and a second AC-DC conversion circuit; the X-ray tube is connected between the output end of the first AC-DC conversion circuit and the output end of the second AC-DC conversion circuit. The X-ray bulb tube is powered by simultaneously connecting two symmetrical AC-DC conversion circuits through one step-up transformer, so that one transformer can be omitted, and the weight of the device is reduced.)

1. The utility model provides an X ray generating device of light-weighted low pressure power supply, includes supply circuit, X ray bulb, filament transformer and oil tank, its characterized in that: the power supply circuit comprises a control circuit, a DC-AC inverter circuit, a boosting transformer, a first AC-DC conversion circuit and a second AC-DC conversion circuit, wherein the control circuit is in driving connection with the DC-AC inverter circuit, the DC-AC inverter circuit is connected with an external power supply and outputs to the boosting transformer, the first AC-DC conversion circuit and the second AC-DC conversion circuit are connected to the output end of the boosting transformer in parallel, and output voltages are symmetrical; the X-ray tube is connected between the output end of the first AC-DC conversion circuit and the output end of the second AC-DC conversion circuit.

2. The X-ray generator of claim 1, wherein the X-ray generator is configured to be powered by a light weight low voltage power supply, the X-ray generator comprising: the first AC-DC conversion circuit comprises a first rectifying circuit and a first voltage multiplying circuit, and the second AC-DC conversion circuit comprises a second rectifying circuit and a second voltage multiplying circuit.

3. The X-ray generation device of claim 2, characterized in that: the power supply circuit further comprises a first tube voltage sensing circuit and a second tube voltage sensing circuit, wherein the first tube voltage sensing circuit feeds back the voltage of the output end of the first AC-DC conversion circuit to the control circuit, and the second tube voltage sensing circuit feeds back the voltage of the output end of the second AC-DC conversion circuit to the control circuit.

4. A light weight, low voltage powered X-ray generating device as claimed in any one of claims 1 to 3, wherein: the step-up transformer, the X-ray bulb tube and the filament transformer are arranged in the oil tank.

5. The X-ray generation device of claim 4, characterized in that: the first AC-DC conversion circuit and the second AC-DC conversion circuit are arranged in the oil tank.

6. The X-ray generation device of claim 6, characterized in that: the first AC-DC conversion circuit and the second AC-DC conversion circuit are symmetrically distributed in the oil tank in a separated mode.

7. The X-ray generator of claim 7, wherein the X-ray generator is configured to be powered by a light weight low voltage power supply, the X-ray generator comprising: the DC-AC inverter circuit is connected to oil in the oil tank through a heat conduction mechanism.

8. The X-ray generation device of claim 8, wherein the X-ray generation device is configured to be powered by a light weight low voltage power supply, and further comprises: the heat conducting mechanism comprises a heat conducting seat and a plurality of radiating fins integrally connected with the heat conducting seat, the radiating fins are arranged in the oil tank, the heat conducting seat is arranged outside the oil tank, and the DC-AC inverter circuit is fixedly arranged on the heat conducting seat.

9. The X-ray generation device of claim 4, characterized in that: the first AC-DC conversion circuit and the second AC-DC conversion circuit are arranged outside the oil tank.

Technical Field

The invention relates to the technical field of X-ray detection, in particular to an X-ray generating device with light weight and low voltage power supply.

Background

In the X-ray photography, the X-ray tube needs high voltage to be excited to generate X-rays, and in the application of the X-ray generating device with low voltage power supply, a series of power supply conversion devices are needed to convert the low voltage power supply into the high voltage power needed by the X-ray tube. In an X-ray generating apparatus, a DC-AC converting part converts a direct current into a high frequency alternating current, a high voltage transformer converts the high frequency alternating current into a high voltage alternating current, an AC-DC converting part converts the high voltage alternating current into a direct current, the direct current is supplied to an X-ray tube to generate X-rays, and a sensor part performs feedback control to improve the quality of the X-rays by sampling a tube voltage and a tube current of the X-ray tube.

When the DC-AC converting part converts direct current into alternating current, the DC-AC converting part loses a large amount of power in the form of heat due to internal resistance of the device, large operating current, high switching frequency, and the like. Similarly, a high voltage transformer, an AC-DC converter, an X-ray tube, and the like generate a large amount of heat, and the devices are in a high voltage state.

The traditional X-ray generating device controls the absolute potential at two ends of the bulb tube through two high-voltage transformers and an AC-DC conversion component so as to obtain the relative voltage difference required by the bulb tube, and the overhigh absolute potential causes the insulating structure to require higher insulating capability and causes the insulating structure to have larger size. In order to quickly absorb the heat generated by the conduction devices and ensure insulation, the devices are arranged in an airtight oil-filled tank shell, and an insulating material structure is arranged to improve the insulating performance. Moreover, since each power converter is installed in the oil tank, the volume required by the oil tank is increased, and a larger oil tank requires more oil, which increases the volume and weight of the X-ray generation device, which makes it difficult to make the device light-weight and small-size.

Disclosure of Invention

The invention aims to provide a light-weight low-voltage power supply X-ray generating device, in particular to an X-ray generating device which is small and light in structure and can supply power by using a low-voltage power supply.

In order to achieve the purpose, the invention adopts the following technical scheme: a light-weight low-voltage power supply X-ray generating device comprises a power supply circuit, an X-ray bulb tube, a filament transformer and an oil tank, wherein the power supply circuit comprises a control circuit, a DC-AC inverter circuit, a step-up transformer, a first AC-DC conversion circuit and a second AC-DC conversion circuit; the X-ray tube is connected between the output end of the first AC-DC conversion circuit and the output end of the second AC-DC conversion circuit.

Specifically, the first AC-DC conversion circuit includes a first rectifying circuit and a first voltage multiplying circuit, and the second AC-DC conversion circuit includes a second rectifying circuit and a second voltage multiplying circuit.

Further, the power supply circuit further comprises a first tube voltage sensing circuit and a second tube voltage sensing circuit, wherein the first tube voltage sensing circuit feeds back the voltage of the output end of the first AC-DC conversion circuit to the control circuit, and the second tube voltage sensing circuit feeds back the voltage of the output end of the second AC-DC conversion circuit to the control circuit.

Specifically, the step-up transformer, the X-ray bulb tube and the filament transformer are arranged in the oil tank.

Further, the first AC-DC conversion circuit and the second AC-DC conversion circuit are arranged in the oil tank.

Further, the first AC-DC conversion circuit and the second AC-DC conversion circuit are symmetrically distributed in the oil tank in a separated mode.

Further, the DC-AC inverter circuit is connected to oil in the oil tank through a heat conducting mechanism.

Furthermore, the heat conducting mechanism comprises a heat conducting seat and a plurality of radiating fins integrally connected with the heat conducting seat, the radiating fins are arranged in the oil tank, the heat conducting seat is arranged outside the oil tank, and the DC-AC inverter circuit is fixedly arranged on the heat conducting seat.

In another scheme, the first AC-DC conversion circuit and the second AC-DC conversion circuit are arranged outside the oil tank.

The invention has the advantages that:

1. the X-ray bulb tube is powered by simultaneously connecting two symmetrical AC-DC conversion circuits through the boosting transformer, so that one transformer can be omitted, and the weight of equipment is reduced;

2. two mutually symmetrical AC-DC conversion circuits are connected in parallel to a transformer, so that the symmetry of voltages applied to two ends of an X-ray bulb tube can be improved, and the more symmetrical the voltages loaded at the two ends of the tube voltage, the more the driving circuit of the bulb tube is in a midpoint grounding mode, the more the bulb tube can be ensured to work in an optimal state, and the control of X-ray generation is facilitated;

3. the voltage at the two ends of the X-ray bulb tube is fed back to the control circuit, and the duty ratio of the input alternating current of the transformer can be adjusted by controlling a driving signal of the DC-AC inverter circuit by the control circuit according to the actual voltage value in the working process, so that the voltage applied to the two ends of the X-ray bulb tube is adjusted in real time;

4. the AC-DC conversion circuit is arranged in the oil tank, and the DC-AC inverter circuit is connected with the inside of the oil tank through the heat conduction mechanism, so that the oil tank provides heat dissipation for all components of the generating device, and the influence of a plurality of radiators on the overall light weight of the generating device is avoided.

Drawings

FIG. 1 is a schematic circuit diagram of an X-ray generating apparatus according to embodiment 1, 2 or 3;

FIG. 2 is a schematic diagram of the distribution and connection of the components of the X-ray generating apparatus according to embodiment 1;

FIG. 3 is a schematic diagram of the distribution and connection of the components of the X-ray generating apparatus according to embodiment 2 or 3;

FIG. 4 is a view showing a distribution structure of devices in an oil tank in example 2 or 3;

fig. 5 is a specific connection structure diagram of the DC-AC inverter circuit, the heat conducting mechanism, and the oil tank in embodiment 3.

Detailed Description