Voltage multiplier module and radiation source module with same

Abstract

The invention discloses a voltage multiplier module for providing a positive high voltage and a negative high voltage for an X-ray tube assembly, the voltage multiplier module comprising: a housing in which a mounting cavity is defined, the housing having a bottom surface located in a first plane; the positive voltage multiplier is positioned in the second plane and is used for providing positive high voltage for the X-ray tube assembly; the negative voltage multiplier is positioned in a third plane and is used for providing negative high voltage for the X-ray tube assembly; wherein the first plane, the second plane and the third plane are mutually and obliquely crossed in pairs. According to the voltage multiplier module, the projection length of the positive and negative voltage multipliers on the plane of the shell can be effectively reduced, the size of the shell is reduced, the insulation space is effectively utilized, enough insulation space is reserved for the high-voltage end, the overall size and weight of the module are reduced, and miniaturization and light weight of the voltage multiplier module are achieved.

Description

Technical Field

[0001] This invention belongs to the field of X-ray source module technology, specifically relating to a voltage multiplier module and a X-ray source module having the same. Background Technology

[0002] With the rapid advancement of science and technology, compact X-ray sources, characterized by their light weight and small size, are widely used in various security, medical, and testing fields. Due to the insulation distance requirements of high voltage, sufficient clearance must be reserved for the installation of voltage multipliers. This results in X-ray source modules above 50kV generally being large and heavy, making it inconvenient to integrate the X-ray source into handheld or small devices. Commercially available bipolar small X-ray sources are all arranged in the same direction or horizontally, as disclosed in patent CN108605405B. Such arrangements do not effectively utilize the insulating medium, leading to generally large module size and weight. Especially with increasing voltage, the module size increases at an accelerated rate, significantly increasing the difficulty of device integration. Summary of the Invention

[0003] The purpose of this invention is to provide a voltage multiplier module and a radiation source module having the same, in order to solve the problems of large size and heavy weight of radiation source modules in the prior art.

[0004] This invention provides a voltage multiplier module for providing positive and negative high voltages to an X-ray tube assembly. The voltage multiplier module includes: A housing having a mounting cavity defined therein, the housing having a bottom surface located in a first plane; A positive voltage multiplier, located in the second plane, is used to provide a positive high voltage to the X-ray tube assembly; A negative voltage multiplier, located in the third plane, is used to provide a negative high voltage to the X-ray tube assembly; The first plane, the second plane, and the third plane intersect each other obliquely.

[0005] Further, the angle between the second plane and the first plane is in the range of 3° to 30°; and / or, the angle between the third plane and the first plane is in the range of 3° to 30°; and / or, the angle between the projections of the positive voltage multiplier and the negative voltage multiplier onto the first plane is in the range of 120° to 174°, and the fourth plane is perpendicular to both the second plane and the third plane.

[0006] Furthermore, the voltage gradient of the positive voltage multiplier extends obliquely in the direction opposite to the bottom surface of the housing, and the voltage gradient of the negative voltage multiplier extends obliquely in the direction opposite to the bottom surface of the housing.

[0007] According to a second aspect of the present invention, the radiation source module includes: The voltage multiplier module described in the above embodiment includes a positive voltage multiplier and a negative voltage multiplier. An X-ray tube assembly, located within a mounting cavity of a housing, has a cathode and an anode, wherein an electron beam emitted from the cathode bombards the anode to cause the anode to emit X-rays.

[0008] Furthermore, the positive high-voltage terminal of the positive voltage multiplier is connected to the anode of the X-ray tube assembly, and the other end is connected to the housing; the negative high-voltage terminal of the negative voltage multiplier is connected to the cathode of the X-ray tube assembly, and the other end is connected to the housing.

[0009] Furthermore, the positive high-voltage terminal of the positive voltage multiplier is connected to the cathode terminal of the X-ray tube assembly, and the other end is connected to the housing; the negative high-voltage terminal of the negative voltage multiplier is connected to the anode terminal of the X-ray tube assembly, and the other end is connected to the housing.

[0010] Furthermore, the ray tube assembly is located between the positive voltage multiplier and the negative voltage multiplier.

[0011] Furthermore, the ray tube assembly includes: An X-ray tube for emitting the X-rays; A shielding cover is fitted over the outside of the X-ray tube to separate the X-ray tube from the positive voltage multiplier and the negative voltage multiplier.

[0012] Furthermore, the ray tube assembly is located above the positive voltage multiplier and the negative voltage multiplier.

[0013] The voltage multiplier module according to the embodiments of the present invention can effectively reduce the projected length of the positive and negative voltage multipliers on the housing plane, reduce the housing size, effectively utilize the insulation space, leave sufficient insulation space for the high voltage end, reduce the overall volume and weight of the module, and realize the miniaturization and lightweighting of the voltage multiplier module. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a voltage multiplier module according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the X-ray source module according to an embodiment of the present invention; Figure 3 This is a structural schematic diagram showing the positions of the X-ray source module and the X-ray tube assembly according to an embodiment of the present invention; Figure 4 This is a comparative structural diagram of a positive voltage multiplier in the prior art and a positive voltage multiplier in the embodiment of the present invention; Figure 5 A top view of a radiation source module according to an embodiment of the present invention; Figure 6 This is yet another structural schematic diagram of the X-ray source module according to an embodiment of the present invention; Figure 7 This is another structural schematic diagram of the X-ray source module according to an embodiment of the present invention. Attached Figure

[0015] Voltage multiplier module 100; housing 10; positive voltage multiplier 20; negative voltage multiplier 30; X-ray tube assembly 200; first plane A; second plane B; third plane C.

[0016] X-ray source module 1000. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The terms "first," "second," etc., used in the specification and claims of this invention are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0019] The following is combined with Figures 1 to 7 The voltage multiplier module 100 provided in this embodiment of the invention will be described in detail through specific implementations and application scenarios.

[0020] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0021] According to an embodiment of the present invention, a voltage multiplier module 100 is used to provide positive and negative high voltages to an X-ray tube assembly 200. The voltage multiplier module 100 includes a housing 10, a positive voltage multiplier 20, and a negative voltage multiplier 30.

[0022] Specifically, a mounting cavity is defined within the housing 10, and the housing 10 has a bottom surface located within the first plane A (i.e., Figure 2The positive voltage multiplier 20 is located in the second plane B to provide a positive high voltage to the X-ray tube assembly 200; the negative voltage multiplier 30 is located in the third plane C to provide a negative high voltage to the X-ray tube assembly 200; wherein, the first plane A, the second plane B and the third plane C intersect each other obliquely. It should be explained that, as Figure 2 As shown, since the positive voltage multiplier 20 is a three-dimensional structure, the description of the positive voltage multiplier 20 being located in the second plane B means that the plane near its center of the positive voltage multiplier 20 is located in the second plane B. Similarly, the description of the negative voltage multiplier 30 being located in the third plane C means that the plane near its center of the negative voltage multiplier 30 is located in the third plane C.

[0023] In other words, this invention addresses the issue of the large size of existing compact X-ray source modules by proposing a more compact X-ray source arrangement that achieves both bipolarity and overall reduction in the size of the X-ray source. Specifically, the positive voltage multiplier 20 and the negative voltage multiplier 30 are each supported by a certain inclined angle to the bottom surface of the housing 10, and a certain inclined angle is also maintained between the positive voltage multiplier 20 and the negative voltage multiplier 30. The potential of the housing 10 is low or grounded, and the voltage difference between the positive voltage multiplier 20 and the negative voltage multiplier 30 ranges from 50kV to 200kV. Taking the positive voltage multiplier 20 as an example... Figure 4 As shown, when the negative voltage multiplier 30 is tilted at 30°, compared with the horizontally placed negative voltage multiplier 30 in the prior art (e.g.) Figure 4 (As shown by the dashed line), at the low-voltage end (that is, at...) Figure 2 With the upper and lower surfaces of the housing 10 maintaining a safe distance H1 thickness, the projected length D2 of the tilted negative voltage multiplier 30 on the bottom surface of the housing 10 is only 0.7 times the projected length D1 of the horizontally placed negative voltage multiplier on the bottom surface of the housing 10. The tilted negative voltage multiplier 30 effectively reduces the overall length and volume of the module. Similarly, the tilted positive voltage multiplier 20 also effectively reduces the overall length and volume of the module. Furthermore, the tilted positive voltage multiplier 20 and negative voltage multiplier 30 also facilitate vacuum degassing during insulating medium filling.

[0024] Therefore, the voltage multiplier module 100 according to the present invention can effectively reduce the projected length of the positive and negative voltage multipliers on the bottom surface of the housing 10, reduce the size of the housing 10, effectively utilize the insulation space, leave sufficient insulation space for the high voltage end, reduce the overall volume and weight of the module, and realize the miniaturization and lightweighting of the voltage multiplier module 100.

[0025] According to one embodiment of the present invention, the angle between the second plane B and the first plane A is approximately 3° to 30°; optionally, the angle between the third plane C and the first plane A is approximately 3° to 30°. Optionally, the angle between the projections of the positive voltage multiplier 20 and the negative voltage multiplier 30 onto the third plane C is 120° to 174°.

[0026] like Figure 2 As shown, the positive voltage multiplier 20 and the negative voltage multiplier 30 are not completely parallel to the bottom surface of the housing 10. A certain angle is formed between the positive voltage multiplier 20 and the bottom surface of the housing 10, and a certain angle is also formed between the negative voltage multiplier 30 and the bottom surface of the housing 10. Figure 5 and Figure 7 As shown, the projections of the positive voltage multiplier 20 and the negative voltage multiplier 30 on the bottom surface of the housing 10 are basically parallel. The angle between the projection center lines of the positive voltage multiplier 20 and the negative voltage multiplier 30 and the housing 10 perpendicular to the bottom surface of the housing 10 ranges from 120° to 174°. It should be noted that the specific structural forms of the positive voltage multiplier 20 and the negative voltage multiplier 30 are not limited to the approximately rectangular structure shown in the figure; they can also have other curved or irregular structures. For irregularly shaped positive voltage multiplier 20 and negative voltage multiplier 30, the projection angle here refers to the angle between the line connecting the two ends of the projection of the positive voltage multiplier 20 and the line connecting the two ends of the projection of the negative voltage multiplier 30, which is 120° to 174°. Figure 2 As shown, the fourth plane D is perpendicular to both the second and third planes.

[0027] According to one embodiment of the present invention, the angle between the second plane B and the first plane A can be 3°, the angle between the third plane C and the first plane A is approximately 3°, and the angle between the projections of the positive voltage multiplier 20 and the negative voltage multiplier 30 onto the fourth plane D is 174°.

[0028] According to another embodiment of the present invention, the angle between the second plane B and the first plane A can be 15°, the angle between the third plane C and the first plane A is approximately 15°, and the angle between the projections of the positive voltage multiplier 20 and the negative voltage multiplier 30 onto the fourth plane D is 150°.

[0029] In one embodiment of the present invention, the angle between the second plane B and the first plane A can be 30°, the angle between the third plane C and the first plane A is approximately 30°, and the angle between the projections of the positive voltage multiplier 20 and the negative voltage multiplier 30 onto the fourth plane D is 120°.

[0030] Furthermore, such as Figure 3 , Figure 5 and Figure 7As shown, the voltage gradient E1 of the positive voltage multiplier 20 extends obliquely along the side opposite to the bottom surface of the housing 10, and the voltage gradient E2 of the negative voltage multiplier 30 extends obliquely along the side opposite to the bottom surface of the housing 10. This facilitates the connection between the high voltage end of the positive voltage multiplier 20 and the high voltage end of the negative voltage multiplier 30 and the corresponding end of the ray tube assembly.

[0031] In other words, the high end of the absolute value of the positive voltage multiplier 20 is close to the low end of the absolute value of the negative voltage multiplier 30, and the low end of the absolute value of the positive voltage multiplier 20 is close to the high end of the absolute value of the negative voltage multiplier 30. The voltage difference between the positive voltage multiplier 20 and the negative voltage multiplier 30 ranges from 50kV to 200kV. Optionally, depending on the voltage withstand requirements of different X-ray tubes, Figure 5 The diagram illustrates the safe distance ranges between the positive voltage multiplier 20 and the negative voltage multiplier 30 and the surface of the housing 10, as well as the safe distance range between the positive voltage multiplier 20 and the negative voltage multiplier 30. When the X-ray tube assembly 200 is located between the positive voltage multiplier 20 and the negative voltage multiplier 30, the distance D3 between the positive voltage multiplier 20 and the negative voltage multiplier 30 is 10mm~60mm. The distances D4 and D6 between the positive voltage multiplier 20 and different surfaces of the housing 10 are respectively: D4 is 2mm~40mm; D6 is 2mm~40mm. The distances D4 and D5 between the negative voltage multiplier 30 and different surfaces of the housing 10 are respectively: D4 is 2mm~40mm; D5 is 2mm~40mm. In other words, in different application scenarios, by arranging the positive voltage multiplier 20 and the negative voltage multiplier 30 at an angle instead of horizontally, the size of the housing 10 is further reduced.

[0032] According to a second aspect of the present invention, the X-ray source module 1000 includes the voltage multiplier module 100 and the X-ray tube assembly 200 described in the above embodiments.

[0033] Specifically, the voltage multiplier module 100 includes a positive voltage multiplier 20 and a negative voltage multiplier 30; the X-ray tube assembly 200 is located in the mounting cavity of the housing 10, and the X-ray tube assembly 200 has a cathode end and an anode end, wherein the electron beam emitted from the cathode end bombards the anode end to cause the anode end to emit X-rays.

[0034] Optionally, the positive high-voltage terminal of the positive voltage multiplier 20 is connected to the anode terminal of the X-ray tube assembly 200, and the other end is connected to the housing 10; the negative high-voltage terminal of the negative voltage multiplier 30 is connected to the cathode terminal of the X-ray tube assembly 200, and the other end is connected to the housing 10. The housing 10 is either a low-potential terminal or a grounded terminal.

[0035] Optionally, the positive high-voltage end of the positive voltage multiplier 20 is connected to the cathode end of the X-ray tube assembly 200, and the other end is connected to the housing 10; the negative high-voltage end of the negative voltage multiplier 30 is connected to the anode end of the X-ray tube assembly 200, and the other end is connected to the housing 10.

[0036] According to one embodiment of the present invention, the X-ray tube assembly 200 is located between the positive voltage multiplier 20 and the negative voltage multiplier 30. Optionally, depending on the voltage withstand requirements of different X-ray tubes and the outer diameter of the X-ray tube assembly 200, Figure 7 The projections of the positive voltage multiplier 20 and the negative voltage multiplier 30 on the bottom surface of the housing 10 are shown. The distance D7 between the high voltage terminal of the positive voltage multiplier 20 and the low voltage terminal of the negative voltage multiplier 30 is 20mm to 200mm. The distance D7 between the low voltage terminal of the positive voltage multiplier 20 and the high voltage terminal of the negative voltage multiplier 30 is also 20mm to 200mm.

[0037] According to one embodiment of the present invention, the X-ray tube assembly 200 includes an X-ray tube and a shield.

[0038] Specifically, the X-ray tube is used to emit X-rays, and a shield is fitted over the outside of the X-ray tube to separate the X-ray tube from the positive voltage multiplier module 20 and the negative voltage multiplier module 30, respectively, thus achieving a good shielding effect. The X-ray tube assembly 200 is electrically connected to the positive voltage multiplier 20 and the negative voltage multiplier 30 respectively through holes opened in the shield.

[0039] Optionally, the X-ray tube assembly 200 is located above the positive voltage multiplier 20 and the negative voltage multiplier 30. That is to say, the installation method of the X-ray tube assembly 200 is not limited to one. Depending on different application scenarios or requirements, the X-ray tube assembly 200 can also be installed separately above the voltage multiplier module 100.

[0040] Since the X-ray source module 1000 according to the embodiment of the present invention has the voltage multiplier module 100 described in the above embodiment, and the voltage multiplier module 100 has the characteristics of small size and light weight, the X-ray source assembly having the voltage multiplier module 100 of the above embodiment also has the characteristics of small size and light weight.

[0041] Other structures and working principles of the X-ray source module 1000 according to this utility model are existing technologies and will not be described in detail here.

[0042] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A voltage multiplier module, characterized in that, The voltage multiplier module, used to provide positive and negative high voltages to the X-ray tube assembly, includes: A housing having a mounting cavity defined therein, the housing having a bottom surface located in a first plane; A positive voltage multiplier, located in the second plane, is used to provide a positive high voltage to the X-ray tube assembly; A negative voltage multiplier, located in the third plane, is used to provide a negative high voltage to the X-ray tube assembly; The first plane, the second plane, and the third plane intersect each other obliquely in pairs.

2. The voltage multiplier module according to claim 1, characterized in that, The angle between the second plane and the first plane is in the range of 3° to 30°; and / or, the angle between the third plane and the first plane is in the range of 3° to 30°; and / or, the angle between the projections of the positive voltage multiplier and the negative voltage multiplier onto the fourth plane is in the range of 120° to 174°, and the fourth plane is perpendicular to both the second plane and the third plane.

3. The voltage multiplier module according to claim 1, characterized in that, The positive voltage multiplier and the negative voltage multiplier are arranged in a centrally symmetrical manner.

4. The voltage multiplier module according to claim 1, characterized in that, The voltage gradient of the positive voltage multiplier extends obliquely in the direction opposite to the bottom surface of the housing, and the voltage gradient of the negative voltage multiplier extends obliquely in the direction opposite to the bottom surface of the housing.

5. A radiation source module, characterized in that, include: The voltage multiplier module according to any one of claims 1-4, the voltage multiplier module comprising a positive voltage multiplier and a negative voltage multiplier; An X-ray tube assembly, located within a mounting cavity of a housing, has a cathode and an anode, wherein an electron beam emitted from the cathode bombards the anode to cause the anode to emit X-rays.

6. The X-ray source module according to claim 5, characterized in that, The positive high-voltage terminal of the positive voltage multiplier is connected to the anode of the X-ray tube assembly, and the other end is connected to the housing. The negative high-voltage terminal of the negative voltage multiplier is connected to the cathode of the X-ray tube assembly, and the other end is connected to the housing.

7. The X-ray source module according to claim 5, characterized in that, The positive high-voltage terminal of the positive voltage multiplier is connected to the cathode terminal of the X-ray tube assembly, and the other end is connected to the housing. The negative high-voltage terminal of the negative voltage multiplier is connected to the anode terminal of the X-ray tube assembly, and the other end is connected to the housing.

8. The X-ray source module according to claim 5, characterized in that, The ray tube assembly is located between the positive voltage multiplier and the negative voltage multiplier.

9. The X-ray source module according to claim 5, characterized in that, The ray tube assembly includes: An X-ray tube for emitting the X-rays; A shielding cover is fitted over the outside of the X-ray tube to separate the X-ray tube from the negative voltage multiplier and the positive voltage multiplier.

10. The X-ray source module according to claim 5, characterized in that, The ray tube assembly is located above the positive voltage multiplier and the negative voltage multiplier.

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