X-ray tube head and X-ray machine

Abstract

The invention provides an X-ray tube head. The X-ray tube head comprises a metal shell (10), an X-ray tube (20) and a driving circuit (30). The metal shell is of a closed structure and is filled with insulating fluid. The X-ray tube is arranged in the metal shell and comprises a grounded anode target (21), an anode handle (23) and a cathode filament (24). The anode handle is connected with the anode target and the inner surface of the metal shell, and the anode handle can guide heat of the anode target to the metal shell. The cathode filament has a first cathode terminal (25). The driving circuit is arranged in the metal shell, the driving circuit is provided with a positive high-voltage connecting end (33) and a negative high-voltage connecting end (34), the positive high-voltage connecting end is grounded, and the negative high-voltage connecting end is connected with the first cathode wiring end and inputs direct-current negative high voltage, so that tube voltage needed by work is formed between the anode target and the cathode filament. The X-ray tube head can continuously and stably work for a long time. The invention further provides an X-ray machine comprising the X-ray tube head.

Description

Technical Field

[0001] The present disclosure relates to the field of X-ray medical equipment, in particular to an X-ray tube head and an X-ray machine comprising the X-ray tube head. Background Art

[0002] An X-ray tube head is an X-ray tube assembly, which usually includes a metal shell, an X-ray tube, and a driving circuit. The X-ray tube and the driving circuit are arranged in a metal shell that is sealed and filled with an insulating fluid. When the X-ray tube head is working, a huge amount of heat will be generated on the anode target and the anode handle of the X-ray tube. The existing X-ray tube head inputs a positive high voltage to the anode of the X-ray tube through a driving circuit to form a tube voltage between the anode and the cathode of the X-ray tube. Therefore, the anode handle cannot be in direct contact with the metal shell, and a heat sink needs to be arranged on the anode handle, and the heat on the anode handle is transferred to the metal shell through the insulating fluid to achieve heat dissipation.

[0003] When the X-ray tube head works for a long time, a large amount of heat accumulates on the anode target, anode handle and radiator, which causes the surrounding insulating fluid to be overheated and cracked, resulting in reduced safety performance, which may cause damage to the X-ray tube head or even unexpected shutdown of the X-ray device. Therefore, the existing X-ray tube head cannot maintain long-term continuous operation. Summary of the invention

[0004] The purpose of the present disclosure is to provide an X-ray tube head that can work stably for a long time.

[0005] Another object of the present disclosure is to provide an X-ray machine that can work stably for a long period of time.

[0006] The present disclosure provides an X-ray tube head, comprising a metal shell, an X-ray tube and a driving circuit. The metal shell is a closed structure and is filled with an insulating fluid, and the metal shell is grounded. The X-ray tube is arranged in the metal shell, and the X-ray tube comprises an anode target, an anode handle and a cathode filament. The anode target is grounded. The anode handle connects the anode target and the inner surface of the metal shell, and the anode handle can guide the heat of the anode target to the metal shell. The cathode filament has a first cathode terminal. The driving circuit is arranged in the metal shell, and the driving circuit has a positive high-voltage connection terminal and a negative high-voltage connection terminal, the positive high-voltage connection terminal is grounded, and the negative high-voltage connection terminal is connected to the first cathode terminal and inputs a DC negative high voltage, so that a tube voltage required for operation is formed between the anode target and the cathode filament.

[0007] The X-ray tube head provided by the present disclosure grounds the positive high-voltage connection end of the anode target and the driving circuit, inputs sufficient negative high voltage to the cathode filament through the negative high-voltage connection end of the driving circuit, forms a tube voltage required for operation between the anode target and the cathode filament of the X-ray tube, and connects the anode handle to the metal shell of the X-ray tube to conduct heat. In the X-ray tube head provided by the present disclosure, the heat generated on the anode target can be directly guided to the metal shell through the anode handle, reducing the thermal resistance on the heat dissipation path, greatly improving the heat dissipation efficiency of the anode, and enabling the X-ray tube head to work stably for a long time.

[0008] In another exemplary embodiment of the X-ray tube head, the driving circuit includes a high-voltage transformer and a high-voltage rectifier module. The high-voltage transformer can be connected to a power source outside the metal housing to obtain electrical energy, and output an AC high voltage after voltage transformation. The high-voltage rectifier module has a positive high-voltage connection terminal and a negative high-voltage connection terminal. The high-voltage rectifier module is connected to the high-voltage transformer, and the high-voltage rectifier module rectifies the AC high voltage output by the high-voltage transformer into a DC negative high voltage and outputs it from the negative high-voltage connection terminal.

[0009] In another exemplary embodiment of the X-ray tube head, the cathode filament further has at least one second cathode terminal. The driving circuit further includes a filament transformer, the filament transformer is connected to the second cathode terminal, the filament transformer can be connected to a power source outside the metal housing to obtain electrical energy, and after voltage transformation, a DC high voltage is input to the second cathode terminal, so that a voltage for heating the cathode filament is formed between the second cathode terminal and the first cathode terminal.

[0010] In another exemplary embodiment of the X-ray tube head, the X-ray tube head further comprises a heat conducting plate having a heat conducting surface, the heat conducting plate is connected to the anode handle, and the heat conducting surface is attached to the inner surface of the metal shell.

[0011] In another exemplary embodiment of the X-ray tube head, the heat conducting plate is welded and fixed to the inner surface of the metal shell.

[0012] In another exemplary embodiment of the X-ray tube head, the X-ray tube head further includes a heat dissipation component, which is disposed on the outer surface of the metal shell and contacts the portion where the metal shell is connected to the heat conducting plate. The heat dissipation component can dissipate the heat of the metal shell into the air, thereby further improving the heat dissipation efficiency.

[0013] In another schematic embodiment of the X-ray tube head, the heat dissipation assembly includes a water-cooled head, a heat exchanger, two circulation pipes and a water pump. The water-cooled head is attached to the outer surface of the metal shell and covers the portion where the metal shell is attached to the heat conductive surface. The heat exchanger can be fixed to the C-arm of the C-arm X-ray machine. Two circulation pipes can be fixed to the C-arm, and the two circulation pipes are respectively connected to the water-cooled head and the heat exchanger to form a circulation channel, and the circulation channel is filled with cooling liquid. The water pump can be fixed to the C-arm and drive the cooling liquid to circulate between the water-cooled head and the heat exchanger.

[0014] In another exemplary embodiment of the X-ray tube head, the X-ray tube head further includes a current collection resistor connected between the positive high voltage connection terminal and the ground, thereby being able to collect current information of the X-ray tube in real time.

[0015] In another exemplary embodiment of the X-ray tube head, the X-ray tube head further includes a first voltage collection resistor and a second voltage collection resistor, and the first voltage collection resistor and the second voltage collection resistor are connected in series between the negative high voltage connection terminal and the ground, thereby enabling real-time collection of the voltage information of the X-ray tube.

[0016] The present disclosure provides an X-ray machine, comprising the above-mentioned X-ray tube head.

[0017] Compared with existing X-ray machines, the X-ray tube head of this X-ray machine conducts the heat generated on the anode target directly to the metal casing through the anode handle, reducing the thermal resistance on the heat dissipation path, greatly improving the heat dissipation efficiency of the anode target, and enabling the X-ray machine to work stably for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings are only used to illustrate and explain the present disclosure, and do not limit the scope of the present disclosure.

[0019] Figure 1 It is a structural schematic diagram of an exemplary implementation of an X-ray tube head.

[0020] Figure 2 It is a structural schematic diagram of another exemplary implementation of an X-ray tube head.

[0021] Figure 3 This is a schematic diagram of the X-ray tube head in use.

[0022] Description of symbols

[0023] 10Metal housing

[0024] 20X-ray tube

[0025] 21 Anode target

[0026] 23 Anode handle

[0027] 24 cathode filament

[0028] 25 first cathode terminal

[0029] 26 Second cathode terminal

[0030] 30 drive circuit

[0031] 31 High voltage transformer

[0032] 32 High Voltage Rectifier Module

[0033] 33 Positive high voltage connection terminal

[0034] 34 Negative high voltage connection terminal

[0035] 35 Filament Transformer

[0036] 40 heat conducting plate

[0037] 42 thermal conductive surface

[0038] 50 heat dissipation components

[0039] 52 water cooling head

[0040] 54Heat exchanger

[0041] 56 circulation pipe

[0042] 60C-arm X-ray machine

[0043] 62C-arm

[0044] R1 current collection resistor

[0045] R2 first voltage collection resistor

[0046] R3 second voltage collection resistor DETAILED DESCRIPTION

[0047] In order to have a clearer understanding of the disclosed technical features, purposes and effects, specific embodiments of the present disclosure are now described with reference to the accompanying drawings. The same reference numerals in the drawings represent components with the same structure or similar structures but the same functions.

[0048] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0049] In this article, "first" and "second" do not indicate their importance or order, but are only used to indicate the difference between them for the convenience of document description.

[0050] To simplify the drawings, each figure schematically shows only the parts related to the present disclosure, which do not represent the actual structure of the product.

[0051] Figure 1 Schematic diagram of an exemplary embodiment of an X-ray tube head. Figure 1 The X-ray tube head includes a metal shell 10, an X-ray tube 20 and a driving circuit 30. The metal shell 10 is a closed structure and is filled with an insulating fluid. The metal shell 10 is also grounded to meet safety requirements.

[0052] The X-ray tube 20 is disposed in the metal housing 10. The X-ray tube 20 includes an anode target 21, an anode handle 23, and a cathode filament 24. The anode target 21 is grounded. The anode handle 23 is connected to the anode target 21 and is also connected to the inner surface of the metal housing 10 by direct or indirect contact, and the anode handle 23 can guide the heat of the anode target 21 to the metal housing 10.

[0053] The cathode filament 24 has a first cathode terminal 25. The drive circuit 30 is disposed in the metal housing 10. In an illustrative embodiment, the drive circuit 30 includes a high-voltage transformer 31 and a high-voltage rectifier module 32. The high-voltage transformer 31 can be connected to a power source outside the metal housing 10 to obtain electrical energy, and output an AC high voltage after voltage transformation. The high-voltage rectifier module 32 has a positive high-voltage connection terminal 33 and a negative high-voltage connection terminal 34. The positive high-voltage connection terminal 33 is grounded, and the negative high-voltage connection terminal 34 is connected to the first cathode terminal 25. The high-voltage rectifier module 32 is connected to the high-voltage transformer 31, and the high-voltage rectifier module 32 rectifies the AC high voltage output by the high-voltage transformer 31 into a DC negative high voltage and outputs it from the negative high-voltage connection terminal 34 to the first cathode terminal 25, so that the tube voltage required for operation is formed between the anode target 21 and the cathode filament 24.

[0054] In the existing X-ray tube head, the negative high voltage connection end of the high voltage rectifier module is grounded or connected to the cathode filament to output negative high voltage, while the positive high voltage connection end of the high voltage rectifier module is connected to the anode target to output positive high voltage, so the anode target and the anode handle need to be insulated and cannot contact the metal shell. The heat generated by the anode target can only be conducted through the insulating fluid, and the thermal resistance is large and the heat dissipation efficiency is very low. In the X-ray tube head provided by the present disclosure, the anode target 21 and the positive high voltage connection end 33 of the driving circuit 30 are grounded, and the negative high voltage connection end 34 of the driving circuit 30 inputs sufficient negative high voltage to the cathode filament 24, so as to form a tube voltage required for operation between the anode target 21 and the cathode filament 24 of the X-ray tube. Since the positive high voltage is no longer input to the anode target 21, the anode handle 23 can be connected to the metal shell 10 of the X-ray tube to conduct heat. In the X-ray tube head provided by the present disclosure, the heat generated on the anode target 21 can be directly guided to the metal shell 10 through the anode handle 23, which reduces the thermal resistance on the heat dissipation path, greatly improves the heat dissipation efficiency of the anode, and enables the X-ray tube head to work stably for a long time.

[0055] In an exemplary embodiment, referring to Figure 1 , the cathode filament 24 also has two second cathode terminals 26. The driving circuit 30 also includes a filament transformer 35, and the filament transformer 35 is connected to the two second cathode terminals 26. The filament transformer 35 can be connected to a power source outside the metal housing 10 to obtain electric energy, and after voltage transformation, input a DC high voltage to the second cathode terminals 26, so that a voltage for heating the cathode filament 24 is formed between the second cathode terminals 26 and the first cathode terminals 25.

[0056] In an exemplary embodiment, referring to Figure 1 The X-ray tube head further includes a heat conducting plate 40, which has a heat conducting surface 42. The heat conducting plate 40 is connected to the anode handle 23, and the heat conducting plate 40 is welded and fixed to the inner surface of the metal shell 10, so that the heat conducting surface 42 is attached to the inner surface of the metal shell 10. The heat on the anode handle 23 is absorbed by the heat conducting plate 40, and the contact area with the metal shell 10 is increased to improve the heat conduction efficiency.

[0057] Figure 2 is a schematic structural diagram of another exemplary embodiment of an X-ray tube head. Figure 2 , and Figure 1 The same or similar aspects of the X-ray tube head shown in FIG. 1 are not described in detail. The difference is that the X-ray tube head further includes a heat dissipation assembly 50 . Figure 3 This is a schematic diagram of the X-ray tube head in use. Figure 2 Figure 3, the heat dissipation assembly 50 includes a water cooling head 52, a heat exchanger 54, two circulation pipes 56 and a water pump. The water cooling head 52 is attached to the outer surface of the metal shell 10 and covers the portion attached to the heat conducting surface 42. The heat exchanger 54 can be fixed to the C-arm 62 of the C-arm X-ray machine 62. The two circulation pipes 56 can be fixed to the C-arm 62, and the two circulation pipes 56 are connected to the water cooling head 52 and the heat exchanger 54 respectively to form a circulation channel, and the circulation channel is filled with cooling liquid. The water pump can be fixed to the C-arm 62 and drive the cooling liquid to circulate between the water cooling head 52 and the heat exchanger 54. The cooling liquid can transport the heat on the metal shell 10 to the heat exchanger 54, and then conduct the heat to the air through the heat exchanger 54. However, it is not limited to this. In other exemplary embodiments, the heat dissipation assembly 50 can also be other heat dissipation devices in contact with the metal shell 10, such as an air-cooled radiator composed of heat dissipation fins and a fan.

[0058] In an exemplary embodiment, referring to Figure 2 The X-ray tube head also includes a current collection resistor R1, which is connected between the positive high voltage connection terminal 33 and the ground. This allows real-time collection of current information of the X-ray tube 20. The operating current of the X-ray tube 20 can be collected through the current collection resistor R1 for safety monitoring or auxiliary control.

[0059] In an exemplary embodiment, referring to Figure 2 The X-ray tube head also includes a first voltage collection resistor R2 and a second voltage collection resistor R3, which are connected in series between the negative high voltage connection terminal 34 and the ground to form a voltage divider circuit. The voltage collection resistor R2 and the voltage collection resistor R3 can collect the working voltage of the X-ray tube 20 for safety monitoring or auxiliary control.

[0060] The present disclosure provides an X-ray machine. Figure 3 The X-ray machine may be a C-arm X-ray machine 62 and include the above-mentioned X-ray tube head, and the metal housing 10 is disposed on the C-arm 62 of the C-arm X-ray machine 62 .

[0061] Compared with the existing X-ray machine, the X-ray tube head of the X-ray machine directly guides the heat generated on the anode target 21 to the metal shell 10 through the anode handle 23, reducing the thermal resistance on the heat dissipation path, greatly improving the heat dissipation efficiency of the anode target 21, and enabling the X-ray machine to work stably for a long time.

[0062] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0063] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present disclosure. They are not intended to limit the scope of protection of the present disclosure. Any equivalent implementation scheme or changes that do not deviate from the technical spirit of the present disclosure, such as combination, division or repetition of features, should be included in the scope of protection of the present disclosure.

Claims

1. X-ray tube head, characterized in that: include: A metal shell (10) which is a closed structure and filled with an insulating fluid, wherein the metal shell (10) is grounded; An X-ray tube (20) is disposed in the metal housing (10), and the X-ray tube (20) comprises: an anode target (21), the anode target (21) being grounded, an anode handle (23) connecting the anode target (21) and the inner surface of the metal shell (10), and the anode handle (23) is capable of conducting heat of the anode target (21) to the metal shell (10), and a cathode filament (24) having a first cathode terminal (25); and A drive circuit (30) is arranged in the metal housing (10), the drive circuit (30) having a positive high-voltage connection terminal (33) and a negative high-voltage connection terminal (34), the positive high-voltage connection terminal (33) being grounded, and the negative high-voltage connection terminal (34) being connected to the first cathode terminal (25), so that a tube voltage required for operation is formed between the anode target (21) and the cathode filament (24).

2. The X-ray tube head according to claim 1, characterized in that: The driving circuit (30) comprises: a high-voltage transformer (31), which can be connected to a power source outside the metal housing (10) to obtain electrical energy and output an alternating high voltage after voltage transformation; and A high-voltage rectifier module (32) having the positive high-voltage connection terminal (33) and the negative high-voltage connection terminal (34); the high-voltage rectifier module (32) is connected to the high-voltage transformer (31); the high-voltage rectifier module (32) rectifies the AC high voltage output by the high-voltage transformer (31) into a DC negative high voltage and outputs the DC negative high voltage from the negative high-voltage connection terminal (34).

3. The X-ray tube head according to claim 1, wherein: The cathode filament (24) also has at least one second cathode terminal (26); the drive circuit (30) also includes a filament transformer (35), the filament transformer (35) is connected to the second cathode terminal (26), the filament transformer (35) can be connected to a power source outside the metal shell (10) to obtain electrical energy, and after voltage transformation, inputs a DC high voltage to the second cathode terminal (26), so that a voltage is formed between the second cathode terminal (26) and the first cathode terminal (25) to heat the cathode filament (24).

4. The X-ray tube head according to claim 1, wherein: The X-ray tube head also includes a heat conducting plate (40), the heat conducting plate (40) having a heat conducting surface (42), the heat conducting plate (40) being connected to the anode handle (23), and the heat conducting surface (42) being attached to the inner surface of the metal shell (10).

5. The X-ray tube head according to claim 4, characterized in that: The heat conducting plate (40) is welded and fixed to the inner surface of the metal shell (10).

6. The X-ray tube head according to claim 4, characterized in that: The X-ray tube head further comprises a heat dissipation component (50), which is arranged on the outer surface of the metal shell (10) and contacts the portion where the metal shell (10) is connected to the heat conducting plate (40). The heat dissipation component (50) can dissipate the heat of the metal shell (10) into the air.

7. The X-ray tube head according to claim 6, characterized in that: The heat dissipation component (50) comprises: a water cooling head (52) which is attached to the outer surface of the metal shell (10) and covers the portion where the metal shell (10) is attached to the heat conducting surface (42); A heat exchanger (54) capable of being fixed to a C-arm of a C-arm X-ray machine; two circulation pipes (56), the two circulation pipes (56) being capable of being fixed to the C-arm, the two circulation pipes (56) respectively connecting the water cooling head (52) and the heat exchanger (54) to form a circulation channel, the circulation channel being filled with cooling liquid; and A water pump can be fixed to the C-arm and drive the cooling liquid to circulate between the water cooling head (52) and the heat exchanger (54).

8. The X-ray tube head according to claim 1, wherein: The X-ray tube head also includes a current collection resistor (R1), and the current collection resistor (R1) is connected between the positive high voltage connection terminal (33) and the ground.

9. The X-ray tube head according to claim 1, wherein: The X-ray tube head also includes a first voltage collection resistor (R2) and a second voltage collection resistor (R3), wherein the first voltage collection resistor (R2) and the second voltage collection resistor (R3) are connected in series between the negative high voltage connection terminal (34) and the ground.

10. X-ray machine, characterized in that The method comprises the X-ray tube head according to any one of claims 1 to 9.

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