Power supply circuit for multiple radioactive sources and static CT equipment

Abstract

The utility model discloses a power supply circuit for multiple radioactive sources and static CT equipment. The power supply circuit comprises a rotor part power supply adapter plate, an AC power distribution unit, an AC power line connected with the input end of the AC power distribution unit, a DC power distribution unit and a DC power line connected with the input end of the DC power distribution unit. Wherein the alternating-current power distribution unit is composed of one or more power distribution boards, and the multiple power distribution boards are connected in sequence in a chain type power supply mode; each power distribution board corresponds to a group of high-voltage inverter boxes, and provides an alternating-current working power supply in a radiation power supply mode; the direct current power distribution unit is composed of one or more terminal block groups, and the power input ends of the terminal block groups are connected with a direct current power line in parallel. And each direct-current power line terminal block group is formed by connecting M terminal blocks in a chain type power supply mode, and provides a direct-current working power supply for the high-voltage inverter box.

Description

Technical Field

[0001] This utility model relates to a power supply circuit for multiple radiation sources, and also to a static CT device including the power supply circuit, belonging to the field of medical device technology. Background Technology

[0002] Computed Tomography (CT) equipment is a three-dimensional imaging device widely used in medical, security inspection, and industrial detection fields. In the medical field, CT equipment performs precise layer-by-layer scans of specific parts of the human body and uses computers to reconstruct images from the scan data, generating tomographic images of the tissues in those specific areas. This provides doctors with diagnostic information for various diseases; therefore, the stability and reliability of CT equipment are crucial performance indicators.

[0003] In existing technologies, many factors affect the stability and reliability of CT equipment. Particularly in terms of power supply, CT equipment, as a large medical electronic and electrical device, is characterized by its complex structure, numerous functional modules, multiple power-consuming units, and limited space. For example, the power-consuming units of a CT equipment include the gantry rotor, gantry stator, scanning bed, computer control cabinet, and power supply cabinet, making these units interconnected and prone to crosstalk in terms of power supply and wiring. Among these, the power supply system from the gantry stator to the gantry rotor, which provides both AC and DC power, has a significant impact. The power supply from the stator to the rotor is typically achieved using a slip ring connection or by laying cables in a cable chain. Using a slip ring connection not only increases the size of the equipment but also increases equipment and maintenance costs. The cable chain wiring method, due to the large number of radiation sources and detectors requiring power in the rotor section, results in complex and difficult-to-maintain power cable connections. Furthermore, if the power supplies to numerous loads are not effectively isolated, mutual interference can occur, reducing power supply stability and reliability, and consequently affecting the image quality of CT imaging.

[0004] To address the aforementioned issues, Chinese Utility Model Patent No. ZL 201921090660.8 discloses a slip-ring-free power supply CT device. This CT device includes a stator power supply system, a scanning gantry, a diagnostic bed, a control console, and a rotor power supply system. By employing two separate power supply systems for the stator and rotor, the slip ring power supply between the stator and rotor is eliminated, thus avoiding the adverse effects of slip rings. Summary of the Invention

[0005] The primary technical problem to be solved by this invention is to provide a power supply circuit for multiple radiation sources.

[0006] Another technical problem to be solved by this utility model is to provide a static CT device including the power supply circuit.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] According to a first aspect of the present invention, a power supply circuit for multiple radiation sources is provided, comprising a rotor power supply adapter board, an AC power distribution unit and an AC power supply line connected to its input terminal, and a DC power distribution unit and a DC power supply line connected to its input terminal; wherein...

[0009] Both the AC power line and the DC power line are led out from the rotor power adapter plate and are respectively connected to the input terminal of the AC power distribution unit and the input terminal of the DC power distribution unit.

[0010] The AC power distribution unit consists of one or more power distribution boards, which are connected sequentially in a chain power supply manner; each power distribution board corresponds to a set of high-voltage inverter boxes, which provide AC working power in a radial power supply manner.

[0011] The DC power distribution unit consists of one or more terminal block groups, and the power input terminals of the multiple terminal block groups are connected to the DC power line in parallel. Each DC power line terminal block group consists of M terminal blocks connected in a chain power supply manner to provide DC operating power to the high-voltage inverter box. Wherein, M≤N / 2, and N is the total number of high-voltage inverter boxes.

[0012] Preferably, the AC power line and DC power line of the rotor power transfer board are both led from the stator power transfer board. The AC power line and the DC power line are both inserted into the protective drag chain using a moving cable or moving wire, and can be laid along the stator in the space between the stator and the rotor.

[0013] Preferably, the AC power distribution unit includes four power distribution boards, which are evenly arranged along the circumference of the rotor; wherein each power distribution board provides AC operating power to the six high-voltage inverter boxes.

[0014] Preferably, the output terminal of the power distribution board is connected to the power line of the high-voltage inverter box using a plug-in connector; and the power distribution board is equipped with multiple fuses to provide short-circuit and overload protection for the load of each output circuit.

[0015] Preferably, the DC power distribution unit is composed of the terminal block group, which includes 12 2P terminal blocks, evenly arranged along the circumference of the rotor; the input and output terminals of each 2P terminal block are respectively connected to a high-voltage inverter box through a high-voltage filter and short-circuit protection board.

[0016] Preferably, the high-voltage filter and short-circuit protection board includes at least two fuses, one varistor, one capacitor and two inductors; each of the high-voltage filter and short-circuit protection boards is installed directly above the high-voltage inverter box.

[0017] Preferably, the two fuses are connected in series on the positive and negative wires of the DC power supply, and the two ends of the varistor are connected to the positive and negative wires of the DC power supply, respectively; the fuses provide short-circuit protection, and the varistor and the fuses together provide overvoltage protection.

[0018] Preferably, the two ends of the capacitor are connected to the positive and negative wires of the DC power supply, respectively, and the two inductors are connected in series on the positive and negative wires of the DC power supply, respectively; the capacitor and the inductors together realize the low-pass filtering function.

[0019] According to a second aspect of the present invention, a static CT device is provided, including the aforementioned power supply circuit for multiple radiation sources.

[0020] Compared with existing technologies, this invention eliminates the slip ring power supply method, and the power supply from the stator to the rotor adopts a cable drag chain installation method. For the AC power supply to the radiation source, multiple power distribution boards are used in a chain connection, with the output terminals of the power distribution boards connected to the power supply wires via plug-in connectors, and each AC power supply circuit has its own short-circuit protection. For the DC power supply to the radiation source, multiple terminal block groups are used in a chain connection, and each DC power supply circuit has its own short-circuit and filtering protection. This design achieves effective isolation and safety protection of the power supply lines, avoids mutual interference between multiple power supply lines, and makes the connection and installation of power cables within the limited space of the CT stator and rotor simple, smooth, and easy to maintain and manage, thereby improving the safety and reliability of the radiation source power supply. Attached Figure Description

[0021] Figure 1 A structural block diagram of a static CT radiation source power supply circuit provided by this utility model;

[0022] Figure 2 This is a circuit diagram of the AC power distribution unit in an embodiment of the present invention;

[0023] Figure 3 This is a circuit diagram showing the connection between the second output terminal of the power distribution board and a set of high-voltage inverter boxes in an embodiment of the present invention.

[0024] Figure 4 This is the electrical wiring diagram of the power distribution board in this embodiment of the utility model;

[0025] Figure 5 This is a circuit diagram of the DC power distribution unit in an embodiment of the present invention;

[0026] Figure 6 This is a circuit diagram of the high-voltage filter and short-circuit protection board in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram showing the installation position of the power supply circuit for the radiation source in an embodiment of this utility model. Detailed Implementation

[0028] The technical content of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Static CT scanners mainly consist of a stator and a rotor, both of which require power. Typically, the overall power consumption of a CT scanner ranges as follows: high-end machines 50–60 kW, mid-range machines 35–45 kW, and low-end machines 20–30 kW. The rotor section alone requires power to supply numerous radiation sources. For example, a conventional CT scanner's rotor typically houses at least 24 radiation sources, or even more densely arranged, to emit X-rays that pass through the scanned target and are received by corresponding detectors, thereby acquiring high-quality medical image data. Each radiation source includes an X-ray tube and a high-voltage inverter box that supplies power to the tube. The high-voltage inverter box requires one DC power supply (DC 550V) to power the tube after inversion and one AC power supply (AC 220V) to power the inverter control board. Typically, the maximum AC load of the high-voltage inverter box is less than 3A, and the maximum DC load is less than 60A. In the special operating environment and complex, confined space of static CT equipment, reliable power supply to numerous loads such as the rotor radiation source is a very important and critical factor for the normal operation of CT equipment.

[0030] like Figure 1As shown, the present invention provides a power supply circuit for multiple radiation sources, including a rotor power adapter board, an AC power distribution unit and an AC power supply line connected to its input terminal, and a DC power distribution unit and a DC power supply line connected to its input terminal. The load of this power supply circuit is multiple radiation sources in the rotor. Both the AC and DC power supply lines are led out from the rotor power adapter board and connected to the input terminals of the AC and DC power distribution units, respectively. N AC power supply circuits output from the AC power supply unit are used to provide AC operating power to N high-voltage inverter boxes, and N DC power supply circuits output from the DC power supply unit are used to provide DC operating power to N high-voltage inverter boxes, where N is the number of radiation sources in the rotor (i.e., the number of high-voltage inverter boxes).

[0031] In this design, both AC and DC power supplies for the rotor power adapter board are derived from the stator power adapter board. The AC and DC power lines from the stator to the rotor power adapter board are threaded together in a protective cable chain using movable cables or wires. This cable chain allows for easy retraction and deployment along the stator within the space between the stator and rotor sections. This cable chain installation method ensures the power lines are easily accessible and protected when the static CT equipment requires low-speed rotation within a small range. It should be noted that other power supply lines, control lines, or communication lines can also be threaded into the cable chain between the stator and rotor sections of the static CT equipment for retraction and protection, depending on the equipment requirements. This invention does not impose any separate limitations on this aspect.

[0032] The AC power distribution unit consists of at least one or more power distribution boards, which are connected sequentially in a chain-like power supply manner. Each power distribution board corresponds to a set of high-voltage inverter boxes, which provide AC operating power using a radial power supply method.

[0033] The DC power distribution unit consists of at least one or more terminal block groups. The power input terminals of the multiple terminal block groups are connected in parallel to the input terminals of the DC power line. Each terminal block group consists of M terminal blocks connected in a chain power supply manner to provide DC operating power to the high-voltage inverter box. Where M is a positive integer and M≤N / 2.

[0034] The specific circuit structure, arrangement, and working principle of the radiation source power supply circuit provided by this utility model will be described in detail below through specific embodiments.

[0035] In one embodiment of this invention, it is assumed that the rotor section of the static CT device has 24 radiation sources arranged along the circumference of the rotor section. For example... Figure 2As shown, the AC power distribution unit includes four power distribution boards. The input terminal J1 of the first power distribution board B1 is connected to the AC 220V power line from the rotor power adapter board; its first output terminal J2 is connected to the input terminal J1 of the second power distribution board B2; and its second output terminal J3 is connected to the first high-voltage inverter box. The first output terminal J2 of the second power distribution board B2 is connected to the input terminal J1 of the third power distribution board B3; and its second output terminal J3 is connected to the second high-voltage inverter box. The first output terminal J2 of the third power distribution board B3 is connected to the input terminal J1 of the fourth power distribution board B4; and its second output terminal J3 is connected to the third high-voltage inverter box. The second output terminal J3 of the fourth power distribution board B4 is connected to the fourth high-voltage inverter box. In other words, the four power distribution boards in the AC power distribution unit use a chain-like power supply method to provide AC power to the four high-voltage inverter boxes respectively.

[0036] The connection between the second output terminal J3 of each power distribution board and a set of high-voltage inverter boxes is as follows: Figure 3 As shown, in this embodiment, the rotor section has 24 radiation sources; therefore, each group of high-voltage inverter boxes includes 6 high-voltage inverter boxes. The power lines of each high-voltage inverter box are connected to the J3 port using plug-in connectors, making cable connections simple, convenient, and easy to maintain and manage.

[0037] The electrical wiring diagram of each power distribution board in the AC power distribution unit is as follows: Figure 4 As shown in the diagram, the power distribution board is designed with an AC 220V three-wire system for input / output. Each output circuit on the power distribution board has a fuse (F1 to F6) on its phase line for short-circuit and overload protection of the load (i.e., the high-voltage inverter box). D1 is a power indicator light; a constantly lit indicator light D1 after the power distribution board is powered on indicates normal power supply. The power distribution board design can also reserve an output port J4 to provide power to other related devices such as switches.

[0038] It should be noted that the number of power distribution boards included in the AC power distribution unit and the number of high-voltage inverter boxes included in a set of high-voltage inverter boxes can be adjusted according to the actual number of radiation sources configured in the rotor section. This embodiment does not limit the number. For example, in other embodiments, the rotor section of the CT equipment is equipped with 48 radiation sources, and the AC power distribution unit can be designed to include 6 power distribution boards, and a set of high-voltage inverter boxes can include 8 high-voltage inverter boxes.

[0039] In one embodiment of this invention, it is assumed that the rotor section of the static CT device has 24 radiation sources arranged along the circumference of the rotor section. For example... Figure 5As shown, the DC power distribution unit consists of a terminal block group, which includes 12 2P terminal blocks, i.e., M=12. The input terminal of the first 2P terminal block is connected to the DC 550V power supply line from the rotor power adapter board. The input / output terminals of the 12 2P terminal blocks are connected sequentially in a chain-like power supply manner. Simultaneously, the input / output terminals of each 2P terminal block are connected to a high-voltage inverter box through a high-voltage filter and short-circuit protection board. Figure 5 The diagram only shows the power supply circuit from the first 2P terminal block to the high-voltage inverter box; that is, in this embodiment, 12 2P terminal blocks are used to provide DC power to 24 radiation sources.

[0040] The high-voltage filter and short-circuit protection board is used to filter and short-circuit protect the DC power supply of the input high-voltage inverter box. For example... Figure 6 As shown, the high-voltage filter and short-circuit protection board includes at least two fuses F, one varistor RV, one capacitor C, and two inductors L. The two fuses F are connected in series with the positive and negative leads of the DC power supply, respectively. The two ends of the varistor RV are connected to the positive and negative leads of the DC power supply, respectively. The fuses F provide short-circuit protection for the power supply circuit, and the varistor RV and fuses F together provide overvoltage protection for the power supply circuit. The two ends of the capacitor C are connected to the positive and negative leads of the DC power supply, respectively, and the two inductors L are connected in series with the positive and negative leads of the DC power supply, respectively. The capacitor C and inductors L together provide low-pass filtering for the power supply circuit, filtering electromagnetic noise generated by the X-ray source.

[0041] The DC power distribution unit outputs N power supply circuits through the above power supply method to provide DC power to the N high-voltage inverter boxes of the CT equipment. Each DC power supply circuit provides short-circuit, overvoltage protection and low-pass filtering functions for the operation of the radiation source through the high-voltage filter and short-circuit protection board, thereby ensuring the reliability of power supply to multiple radiation sources.

[0042] In other embodiments of this invention, when the number of radiation sources installed in the rotor section is large, for example, when 48 radiation sources are arranged along the circumference of the rotor section, the DC power distribution unit can be designed to consist of two or three terminal block groups. The power input terminals of the two or three terminal block groups are connected to the DC power input terminal in parallel. Each terminal block group consists of M 2P terminal blocks connected in a chain power supply manner to provide DC power to a set of high-voltage inverter boxes. Specifically, when two terminal block groups are used, M=12, that is, each terminal block group consists of 12 2P terminal blocks, and the two terminal block groups can provide power to 48 radiation sources; when three terminal block groups are used, M=8, that is, each terminal block group consists of 8 2P terminal blocks, and the three terminal block groups can provide power to 48 radiation sources.

[0043] All component parameters and power supply wire types in the aforementioned AC and DC power distribution units can be rationally selected according to the load current; further examples are not provided here. The installation positions of components such as distribution boards and terminal blocks in a power supply circuit for multiple radiation sources provided in this embodiment are as follows: Figure 7 As shown, 1 is the stator power adapter board; 2 is the rotor power adapter board; 3 is the cable chain and AC and DC power lines; 4 is the high-voltage inverter box and high-voltage filter and short-circuit protection board, a total of 24 groups are evenly arranged along the rotor circumference, and each high-voltage filter and short-circuit protection board is installed directly above the high-voltage inverter box; 5 is the power distribution board, a total of 4 power distribution boards are evenly arranged along the rotor circumference; 6 is the 2P terminal block, arranged in the groove of the rotor, a total of 12 2P terminal blocks are evenly arranged along the rotor circumference.

[0044] The above specific embodiment, with 24 radiation sources in the rotor section, details the specific circuit structure, arrangement, and working principle of the static CT radiation source power supply circuit provided by this utility model. Based on the above power supply circuit for multiple radiation sources, this utility model further provides a static CT device. In addition to the stator section, rotor section, scanning bed, power supply cabinet, and control system, this static CT device also includes a radiation source power supply circuit. This power supply circuit provides highly reliable AC and DC power supplies to the multiple radiation sources installed in the rotor section, thereby ensuring the normal operation of the static CT device and the quality of CT imaging. The specific structure of the radiation source power supply circuit in this static CT device will not be described in detail here.

[0045] In summary, compared with existing technologies, the power supply circuit for multiple radiation sources provided by this utility model eliminates the slip ring power supply method, and the power supply from the stator to the rotor adopts a cable drag chain installation method. Furthermore, the AC power supply to the radiation sources is provided by a chain connection of multiple power distribution boards, with the output terminals of the power distribution boards connected to the power supply wires via plug-in connectors, and each AC power supply circuit is individually equipped with short-circuit protection; the DC power supply to the radiation sources is provided by a chain connection of multiple terminal block groups, and each DC power supply circuit is individually equipped with short-circuit and filtering protection. This achieves effective isolation and safety protection of the power supply lines, avoids mutual interference between multiple power supply lines, and simplifies and streamlines the connection and installation of power cables within the limited space of the CT stator and rotor, facilitating maintenance and management, and improving the safety and reliability of the radiation source power supply.

[0046] It should be noted that the above embodiments are merely illustrative examples. The technical solutions of the various embodiments can be combined, and all are within the protection scope of this utility model.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] The power supply circuit for multiple radiation sources and the static CT equipment provided by this utility model have been described in detail above. Any obvious modifications made to this utility model by those skilled in the art without departing from its essential content will constitute an infringement of the patent rights of this utility model and will incur corresponding legal liability.

Claims

1. A power supply circuit for multiple radiation sources; characterized in that... This includes a rotor power supply adapter board, an AC power distribution unit and its input AC power lines, and a DC power distribution unit and its input DC power lines; among which... Both the AC power line and the DC power line are led out from the rotor power adapter plate and are respectively connected to the input terminal of the AC power distribution unit and the input terminal of the DC power distribution unit. The AC power distribution unit consists of one or more power distribution boards, which are connected sequentially in a chain power supply manner; each power distribution board corresponds to a set of high-voltage inverter boxes, which provide AC working power in a radial power supply manner. The DC power distribution unit consists of one or more terminal block groups, and the power input terminals of the multiple terminal block groups are connected to the DC power line in parallel. Each DC power line terminal block group consists of M terminal blocks connected in a chain power supply manner to provide DC operating power to the high-voltage inverter box. Wherein, M≤N / 2, and N is the total number of high-voltage inverter boxes.

2. The power supply circuit for multiple radiation sources as described in claim 1, characterized in that: The AC power line and DC power line of the rotor power transfer board are both led from the stator power transfer board. The AC power line and the DC power line are both threaded into the protective drag chain by moving cables or moving wires, and can be laid along the stator in the space between the stator and the rotor.

3. The power supply circuit for multiple radiation sources as described in claim 1, characterized in that: The AC power distribution unit includes four power distribution boards, which are evenly arranged along the circumference of the rotor; each power distribution board provides AC power to the six high-voltage inverter boxes.

4. The power supply circuit for multiple radiation sources as described in claim 1 or 3, characterized in that: The output terminal of the power distribution board is connected to the power line of the high-voltage inverter box using a plug-in connector; and the power distribution board is equipped with multiple fuses to provide short-circuit and overload protection for the load of each output circuit.

5. The power supply circuit for multiple radiation sources as described in claim 1, characterized in that: The DC power distribution unit is composed of the terminal block group, which includes 12 2P terminal blocks, evenly arranged along the circumference of the rotor. The input and output terminals of each 2P terminal block are respectively connected to a high-voltage inverter box through a high-voltage filter and short-circuit protection board.

6. The power supply circuit for multiple radiation sources as described in claim 5, characterized in that: The high-voltage filter and short-circuit protection board includes at least two fuses, one varistor, one capacitor and two inductors; Each of the high-voltage filter and short-circuit protection boards is installed directly above the high-voltage inverter box.

7. The power supply circuit for multiple radiation sources as described in claim 6, characterized in that: The two fuses are connected in series on the positive and negative wires of the DC power supply, respectively, and the two ends of the varistor are connected to the positive and negative wires of the DC power supply, respectively; the fuses provide short-circuit protection, and the varistor and the fuses together provide overvoltage protection.

8. The power supply circuit for multiple radiation sources as described in claim 7, characterized in that: The two ends of the capacitor are connected to the positive and negative wires of the DC power supply, respectively, and the two inductors are connected in series with the positive and negative wires of the DC power supply, respectively; the capacitor and the inductors together realize the low-pass filtering function.

9. A static CT scanner, characterized in that... It includes the power supply circuit for multiple radiation sources as described in any one of claims 1 to 8.

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