A CT tube core over-temperature protection device

Abstract

The present invention relates to the field of CT tubes, and discloses a tube core over-temperature protection device for a CT tube, comprising an outer sleeve of a tube core body, a circulation conveying component, an oil cooling and heat dissipation component, and a water cooling and heat dissipation component. The tube core body is provided with a cathode filament and a rotating anode, the outer sleeve is arranged outside the tube core body for protecting the tube core body, and the circulation conveying component is installed outside the outer sleeve for conveying transformer oil in a transformer oil cavity. Compared with the prior art, the present application realizes circulation cooling of transformer oil by arranging a circulation conveying component and an oil cooling and heat dissipation component when the tube core body is in normal operation. When the detected temperature exceeds a safe range, a warning light will display a yellow light, and a sound will be generated for reminder, and the rotation speed of an oil pump and a cooling fan will be increased to accelerate the circulation of transformer oil and accelerate the heat dissipation by blowing air, thereby preventing the transformer oil from heating up too fast.

Description

Technical Field

[0001] The invention relates to the field of CT tubes, in particular to a tube core over-temperature protection device for a CT tube. Background Art

[0002] The CT tube is an important component of the computed tomography (CT) equipment, also known as the X-ray tube or transmitting tube. The working principle of the CT tube is to use a high-voltage electric field to accelerate the electron beam and bombard it onto the anode target surface. In this process, the high-speed electron beam interacts with the atoms on the target surface, generating X-rays while also generating a large amount of heat. This is the main reason why the tube generates heat. During the heating process of the cathode filament of the tube, the current passing through the filament will generate Joule heat, and this part of the heat will also be transferred to other parts of the tube.

[0003] The tube core is the core part of the CT tube, including the cathode and the anode. The cathode is usually composed of a cup-shaped cathode filament, which is responsible for emitting electrons. The anode is the part that produces X-rays, usually composed of a rotating anode molybdenum-based tungsten target. The tube sleeve is the outer shell that wraps the tube core, usually made of metal or other high-temperature resistant materials, which plays a role in protecting and supporting the tube core.

[0004] When the rotating anode inside the tube core is hit by the electron beam, a large amount of high temperature will be generated. Transformer oil is stored between the tube core and the casing of the traditional CT tube, which has the dual effects of insulation and cooling. The cooling of the CT tube is achieved by circulating cooling transformer oil. However, as the CT tube runs for a long time, the temperature will continue to rise. A single oil pump delivery combined with fan blowing cooling cannot achieve the cooling effect in a timely and effective manner, resulting in the temperature of the CT tube equipment continuing to rise. If there is no further protection measure after the temperature is too high, it is easy to cause equipment damage. Therefore, a tube core overtemperature protection device for a CT tube is proposed. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a tube core over-temperature protection device for a CT tube, which has the advantages of early warning reminder after the temperature is too high, automatic water cooling protection, voltage reduction after the temperature is too high, power-off protection, etc., and solves the problem that there is no further cooling protection after the tube core temperature of the CT tube is too high.

[0006] To achieve the above object, the present invention provides the following technical solution: a tube core over-temperature protection device for a CT tube, comprising:

[0007] A tube core body, wherein a cathode filament and a rotating anode are arranged in the tube core body;

[0008] An external sleeve, which is arranged outside the tube core body and is used to protect the tube core body, and a transformer oil cavity is provided between the tube core body and the external sleeve;

[0009] A circulating conveying component, which is installed outside the outer bushing and is used for conveying transformer oil in the transformer oil cavity;

[0010] An oil cooling and heat dissipation component, which is arranged outside the external sleeve and is used to cool the transformer oil in the transformer oil cavity, and a connecting pipe is connected between the oil cooling and heat dissipation component and the circulation conveying component;

[0011] A water-cooled heat dissipation component is arranged outside the external sleeve and is used to further cool the transformer oil in the transformer oil cavity. An early warning component is installed outside the external sleeve.

[0012] Preferably, the warning component comprises a mounting bracket fixedly mounted on the inner wall of the external sleeve, a temperature sensor is connected to the end of the mounting bracket, an alarm mounting seat is connected to the outside of the external sleeve, and a warning light is installed on the side of the alarm mounting seat.

[0013] Preferably, the circulating conveying component includes a conveying outlet pipe and a conveying inlet pipe installed on an external casing, the conveying outlet pipe and the conveying inlet pipe are located at diagonal positions of the external casing, an oil pump is fixedly installed on the side of the external casing, the conveying outlet pipe is connected to the input end of the oil pump, the output end of the oil pump is connected to a liquid outlet pipe, and the liquid outlet pipe is connected to the connecting pipe.

[0014] Preferably, the oil-cooling heat dissipation assembly includes a radiator fixedly mounted on the side of the external sleeve, the side of the radiator is connected to the connecting pipe, the side of the radiator is connected to the equipment output pipe, the end of the equipment output pipe is connected to a three-way valve, a solenoid valve is installed on the three-way valve, the three-way valve is connected to an output channel pipe, and the output channel pipe is connected to the delivery inlet pipe.

[0015] Preferably, a cooling fan is connected to the front of the radiator.

[0016] Preferably, the water-cooled heat dissipation component includes a cooling water tank fixedly mounted on an external sleeve, a water cooling box fixedly mounted on the side of the cooling water tank, a bent water cooling pipe installed in the water cooling box, a flow pipe connected to the three-way valve, the flow pipe is communicated with the bent water cooling pipe, and a water cooling outlet pipe is connected between the bent water cooling pipe and the delivery inlet pipe.

[0017] Preferably, a water pump is installed at the bottom of the cooling water tank, a water outlet of the water pump is connected to a circulation inlet pipe, the circulation inlet pipe is connected to a water cooling box, and a circulation outlet pipe is connected between the water cooling box and the cooling water tank.

[0018] Preferably, a heat dissipation aluminum plate is connected to the top of the cooling water tank, and an exhaust fan is installed above the heat dissipation aluminum plate.

[0019] Compared with the prior art, the present invention provides a tube core over-temperature protection device for a CT tube, which has the following beneficial effects:

[0020] 1. The tube core over-temperature protection device of a CT tube realizes circulating cooling of transformer oil by providing a circulating conveying component and an oil cooling and heat dissipation component when the tube core body is in normal operation. When the detected temperature exceeds the safe range, the warning light will display a yellow light and a sound will be generated for reminder. At the same time, the speed of the oil pump and the cooling fan will be increased to speed up the circulation of the transformer oil and speed up the cooling by blowing, thereby avoiding excessive temperature rise of the transformer oil.

[0021] 2. A tube core over-temperature protection device for a CT tube. When the temperature detected by the temperature sensor continues to rise and exceeds the warning range, the warning light will display red and emit a high-pitched sound for reminder. At the same time, the solenoid valve opens, and the transformer oil enters the water-cooled heat sink through the oil-cooled heat sink. The heat dissipation of the water-cooled heat sink accelerates the cooling of the transformer oil during the circulation process, avoiding the problem of excessive heating of the transformer oil and causing overheating and damage to the equipment.

[0022] 3. This CT tube core over-temperature protection device will control the voltage of the rotating anode when the temperature detected by the temperature sensor rises again. By reducing the voltage, the impact speed of the electron beam is slowed down, thereby reducing the heat generation and realizing automatic protection of the equipment. When the temperature detected by the temperature sensor is still rising, the power is directly cut off to avoid high temperature failure and damage to the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention when viewed from the left and upward;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention when viewed from the right and upward;

[0025] Figure 3 It is a schematic diagram of the structure of the present invention in section;

[0026] Figure 4 It is a structural schematic diagram of the circulating conveying component of the present invention;

[0027] Figure 5 It is a schematic diagram of the exploded structure of the oil cooling and heat dissipation component of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the water-cooling heat dissipation component of the present invention;

[0029] Figure 7 It is a partial cross-sectional structural schematic diagram of the water-cooling heat dissipation component of the present invention;

[0030] Figure 8 It is a schematic diagram of the structure of the early warning component of the present invention.

[0031] In the figure: 1. External sleeve; 2. Tube core body; 3. Transformer oil cavity; 4. Circulation conveying component; 5. Oil cooling heat dissipation component; 6. Water cooling heat dissipation component; 7. Conveying outlet pipe; 8. Conveying inlet pipe; 9. Oil pump; 10. Liquid outlet pipe; 11. Connecting pipe; 12. Radiator; 13. Equipment output pipe; 14. Cooling fan; 15. Three-way valve; 16. Solenoid valve; 17. Output channel pipe; 18. Cooling water tank; 19. Water cooling box; 20. Water pump; 21. Circulation inlet pipe; 22. Circulation outlet pipe; 23. Circulation pipe; 24. Bending water cooling pipe; 25. Water cooling outlet pipe; 26. Heat dissipation aluminum plate; 27. Exhaust fan; 28. Warning component; 29. ​​Alarm mounting seat; 30. Warning light; 31. Mounting bracket; 32. Temperature sensor; 33. Cathode filament; 34. Rotating anode. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a tube core over-temperature protection device for a CT tube.

[0034] In a typical implementation of the present application, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a tube core over-temperature protection device for a CT tube includes:

[0035] The tube core body 2 is provided with a cathode filament 33 and a rotating anode 34. When the cathode filament 33 on the tube core body 2 is energized, an electron beam is emitted, which hits the rotating anode 34 at a very fast speed to generate X-rays;

[0036] An external bushing 1, which is arranged outside the tube core body 2 and is used to protect the tube core body 2. A transformer oil cavity 3 is provided between the tube core body 2 and the external bushing 1;

[0037] A circulating conveying component 4, which is installed outside the external bushing 1 and is used for conveying transformer oil in the transformer oil cavity 3;

[0038] The oil-cooling heat sink 5 is arranged outside the external sleeve 1 and is used to cool the transformer oil in the transformer oil chamber 3. A connecting pipe 11 is connected between the oil-cooling heat sink 5 and the circulating conveying component 4. The circulating conveying component 4 includes a conveying outlet pipe 7 and a conveying inlet pipe 8 installed on the external sleeve 1. The conveying outlet pipe 7 and the conveying inlet pipe 8 are located at diagonal positions of the external sleeve 1. An oil pump 9 is fixedly installed on the side of the external sleeve 1. The conveying outlet pipe 7 is connected to the input end of the oil pump 9, and the output end of the oil pump 9 is connected to the outlet pipe 7. Liquid pipe 10, the liquid outlet pipe 10 is connected with the connecting pipe 11, the oil cooling heat dissipation assembly includes a radiator 12 fixedly mounted on the side of the external sleeve 1, the side of the radiator 12 is connected with the connecting pipe 11, the side of the radiator 12 is connected with a device output pipe 13, the end of the device output pipe 13 is connected with a three-way valve 15, the three-way valve 15 is installed with a solenoid valve 16, the three-way valve 15 is connected with an output channel pipe 17, the output channel pipe 17 is connected with the delivery inlet pipe 8, and the front of the radiator 12 is connected with a cooling fan 14;

[0039] After the electron beam hits the rotating anode 34 at a very fast speed, a large amount of heat is generated, and the generated heat will be absorbed by the transformer oil in the transformer oil chamber 3. During the operation, the oil pump 9 on the circulating conveying component 4 is operated, and the hot oil in the transformer oil chamber 3 is pumped out by the oil pump 9, and enters the radiator 12 through the liquid outlet pipe 10 and the connecting pipe 11. The radiator 12 is provided with many heat dissipation fins, which can quickly dissipate the heat. At the same time, the cooling fan 14 runs to blow air to accelerate the heat dissipation of the radiator 12. The transformer oil after heat dissipation will flow back to the transformer oil chamber 3 through the output channel pipe 17 and the delivery inlet pipe 8. The delivery outlet pipe 7 and the delivery inlet pipe 8 are located at the diagonal position of the external sleeve 1, which can realize a circulation cycle of the transformer oil delivered in and the transformer oil delivered out. Under normal operation, the CT tube is cooled by a single oil-cooled heat dissipation component 5.

[0040] As a preferred implementation in this embodiment, Figure 3 and Figure 8As shown, the early warning component 28 includes a mounting bracket 31 fixedly mounted on the inner wall of the external sleeve 1, a temperature sensor 32 is connected to the end of the mounting bracket 31, an alarm mounting seat 29 is connected to the outer side of the external sleeve 1, and an early warning light 30 is installed on the side of the alarm mounting seat 29. The temperature sensor 32 is arranged inside the transformer oil cavity 3, and can monitor the temperature of the transformer oil at all times. The temperature sensor 32 is connected to the external controller through the temperature sensor 32, and the temperature early warning control can be realized. The temperature sensor 32 transmits the temperature data to the controller. The controller has preset temperature thresholds. Different levels of temperature alarms are defined by these thresholds. When it has not exceeded the safety range, the early warning The warning light 30 will warn green (normal). When the detected temperature exceeds the safety range and is within a certain warning range, the warning light 30 will warn yellow (warning). When the detected temperature exceeds the warning range, the warning light 30 will warn red (danger). Through three levels of temperature thresholds, it is used to warn different safety conditions. The warning light 30 on the warning component 28 will light up. When the warning light 30 appears yellow or red, the warning light 30 will also issue an alarm warning to remind the staff that the temperature is high and make adjustments in time. When the yellow light is on, the volume is between 50-80 decibels, and when the red light is on, the volume is between 80-100 decibels;

[0041] It is worth mentioning that the temperature sensor 32 is disposed at a position on the side where the electron beam hits the rotating anode 34 , so that the temperature in the transformer oil chamber 3 can be accurately detected immediately.

[0042] As a preferred implementation in this embodiment, Figure 4 , Figure 5 and Figure 8 As shown, during operation, when the oil temperature detected by the temperature sensor 32 rises, the warning light 30 will display a yellow light. At this time, the controller controls the rotation speed of the oil pump 9 and the cooling fan 14 to achieve automatic adjustment. After the rotation speed of the oil pump 9 increases, the oil pumping speed will increase, and the circulation and transportation speed of the transformer oil in the transformer oil cavity 3 will increase, thereby speeding up the heat dissipation speed. At the same time, the cooling fan 14 blows faster, and the radiator 12 is blown and cooled more quickly, thereby increasing the heat dissipation speed. Through the automatic adjustment of the oil pump 9 and the cooling fan 14, the problem of excessive temperature in the tube core body 2 is reduced.

[0043] As a preferred implementation in this embodiment, Figure 6 and Figure 7As shown, the water-cooled heat dissipation component 6 is arranged outside the external sleeve 1, and is used to further cool the transformer oil in the transformer oil chamber 3. An early warning component 28 is installed outside the external sleeve 1. The water-cooled heat dissipation component 6 includes a cooling water tank 18 fixedly installed on the external sleeve 1, and a water-cooling box 19 is fixedly installed on the side of the cooling water tank 18. A bent water-cooling pipe 24 is installed in the water-cooling box 19. A flow pipe 23 is connected to the three-way valve 15, and the flow pipe 23 is connected to the bent water-cooling pipe 24. A water-cooling outlet pipe 25 is connected between the bent water-cooling pipe 24 and the delivery inlet pipe 8. A water pump 20 is installed at the bottom of the cooling water tank 18, and a circulating inlet pipe 21 is connected to the water outlet end of the water pump 20. The circulating inlet pipe 21 is connected to the water cooling box 19, and a circulating outlet pipe 22 is connected between the water cooling box 19 and the cooling water tank 18. A heat dissipation aluminum plate 26 is connected to the top of the cooling water tank 18, and an exhaust fan 27 is installed above the heat dissipation aluminum plate 26.

[0044] When the temperature detected by the temperature sensor 32 rises again, the warning light 30 will display a red light. At this time, the controller controls the operation of the solenoid valve 16. After the operation of the solenoid valve 16, the flow direction of the three-way valve 15 is changed from the original equipment output pipe 13 to the output channel pipe 17 to the flow pipe 23. The transformer oil after heat dissipation will enter the water-cooled heat dissipation component 6 for heat dissipation and cooling again. The coolant in the water-cooled box 19 will pass through the water pump 20, the circulation inlet pipe 21 and the circulation outlet pipe 22 to realize the circulation of the coolant, and cool the transformer oil in the bent water-cooled pipe 24. Through double cooling, the cooling speed of the transformer oil can be accelerated, thereby delaying the temperature rise in the tube core body 2 from being too fast.

[0045] It is worth mentioning that the intermediate circulation inlet pipe 21 is arranged at a side position where the transformer oil flows out, and the flow directions of the coolant and the transformer oil are arranged in opposite directions, which can better realize the cooling of the transformer oil.

[0046] As a preferred implementation in this embodiment, Figure 1 and Figure 3 As shown, with continuous operation, when the temperature sensor 32 detects a temperature rise again, the voltage applied to the end of the rotating anode 34 is reduced. By reducing the voltage, the speed at which the electron beam hits the rotating anode 34 becomes slower, thereby reducing the heat generated. By reducing the voltage, over-temperature protection is achieved to avoid damage to the entire equipment. When the temperature detected by the temperature sensor 32 continues to rise, the controller will control the power supply of the tube core body 2 to implement power-off processing, thereby avoiding excessive temperature and causing damage to the equipment.

[0047] Working principle of the present invention: When the CT tube is in use, the cathode filament 33 on the tube core body 2 emits an electron beam after being energized, and hits the rotating anode 34 at a very fast speed to generate X-rays, and at the same time generates a large amount of heat. The hot oil in the transformer oil cavity 3 is pumped out by the oil pump 9 and enters the radiator 12. At the same time, the cooling fan 14 runs to blow air, accelerates the heat dissipation of the radiator 12, and the transformer oil after heat dissipation flows back to the transformer oil cavity 3, so as to achieve the heat dissipation of the CT tube under normal operation;

[0048] During operation, when the oil temperature detected by the temperature sensor 32 rises, the warning light 30 will display a yellow light. At this time, the controller controls the speed of the oil pump 9 and the cooling fan 14. When the speed of the oil pump 9 increases, the speed of pumping oil will increase, and the circulation and delivery speed of the transformer oil will increase. At the same time, the cooling fan 14 blows faster, increasing the heat dissipation speed of the transformer oil and reducing the problem of excessive temperature in the tube core body 2.

[0049] When the temperature detected by the temperature sensor 32 rises again, the warning light 30 will display a red light, and the solenoid valve 16 will change the flow direction of the transformer oil in the three-way valve 15, and the transformer oil after heat dissipation will enter the water-cooled heat dissipation component 6 for heat dissipation and cooling again, which can speed up the cooling speed of the transformer oil, thereby delaying the temperature in the tube core body 2 from rising too fast;

[0050] With continuous operation, when the temperature sensor 32 detects a temperature rise again, the voltage applied to the end of the rotating anode 34 is reduced. By reducing the voltage, the speed at which the electron beam hits the rotating anode 34 becomes slower, thereby reducing the heat generated. By reducing the voltage, over-temperature protection is achieved to avoid damage to the entire equipment. When the temperature detected by the temperature sensor 32 continues to rise, the controller will control the power supply of the tube core body 2 to implement power-off processing, thereby avoiding excessive temperature and damage to the equipment.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A CT tube core over-temperature protection device, characterized in that: include, A tube core body (2), wherein a cathode filament (33) and a rotating anode (34) are arranged in the tube core body (2); An external bushing (1), the external bushing (1) being arranged outside the tube core body (2) and used for protecting the tube core body (2), a transformer oil cavity (3) being arranged between the tube core body (2) and the external bushing (1); A circulating conveying component (4), the circulating conveying component (4) being installed outside the external bushing (1) and used for conveying transformer oil in the transformer oil chamber (3); An oil cooling and heat dissipation component (5), the oil cooling and heat dissipation component (5) being arranged outside the external sleeve (1) and used for cooling the transformer oil in the transformer oil chamber (3), and a connecting pipe (11) being connected between the oil cooling and heat dissipation component (5) and the circulation conveying component (4); A water-cooled heat dissipation component (6), the water-cooled heat dissipation component (6) being arranged outside the external sleeve (1) and used for further cooling the transformer oil in the transformer oil chamber (3), and an early warning component (28) being installed outside the external sleeve (1); The circulating conveying component (4) comprises a conveying outlet pipe (7) and a conveying inlet pipe (8) mounted on the external sleeve (1); the conveying outlet pipe (7) and the conveying inlet pipe (8) are located at diagonal positions of the external sleeve (1); an oil pump (9) is fixedly mounted on the side of the external sleeve (1); the conveying outlet pipe (7) is connected to the input end of the oil pump (9); the output end of the oil pump (9) is connected to a liquid outlet pipe (10); the liquid outlet pipe (10) is connected to a connecting pipe (11); the oil cooling and heat dissipation component (5) The invention comprises a radiator (12) fixedly mounted on the side of an external sleeve (1), the side of the radiator (12) being connected to a connecting pipe (11), the side of the radiator (12) being connected to a device output pipe (13), the end of the device output pipe (13) being connected to a three-way valve (15), a solenoid valve (16) being mounted on the three-way valve (15), an output channel pipe (17) being connected to the three-way valve (15), the output channel pipe (17) being connected to a delivery inlet pipe (8), and the device output pipe (13) being connected to a three-way valve (15). The front of the radiator (12) is connected to a cooling fan (14), the water-cooled heat dissipation component (6) comprises a cooling water tank (18) fixedly mounted on the external sleeve (1), a water cooling box (19) fixedly mounted on the side of the cooling water tank (18), a bent water cooling pipe (24) mounted in the water cooling box (19), a flow pipe (23) connected to the three-way valve (15), the flow pipe (23) being connected to the bent water cooling pipe (24), the bent water cooling pipe (24) being connected to the delivery inlet A water cooling outlet pipe (25) is connected between the pipes (8); a water pump (20) is installed at the bottom of the cooling water tank (18); a water outlet end of the water pump (20) is connected to a circulation inlet pipe (21); the circulation inlet pipe (21) is connected to the water cooling box (19); a circulation outlet pipe (22) is connected between the water cooling box (19) and the cooling water tank (18); a heat dissipation aluminum plate (26) is connected to the top of the cooling water tank (18); an exhaust fan (27) is installed above the heat dissipation aluminum plate (26); The early warning component (28) comprises a mounting bracket (31) fixedly mounted on the inner wall of the external sleeve (1); the end of the mounting bracket (31) is connected to a temperature sensor (32); the outer side of the external sleeve (1) is connected to an alarm mounting seat (29); a warning light (30) is mounted on the side of the alarm mounting seat (29); the temperature sensor (32) is arranged inside the transformer oil cavity (3) and can monitor the temperature of the transformer oil at all times; the temperature sensor (32) is connected to an external controller through the temperature sensor (32) to realize temperature early warning control; the temperature sensor (32) transmits temperature data to the controller; temperature thresholds are preset in the controller, and temperature alarms of different levels are defined by these thresholds.

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