A full metal shell CT tube core exhaust device and exhaust process

Abstract

The present invention relates to the field of CT tube core exhaust technology, and in particular to an exhaust device and exhaust process for a CT tube core with a full metal shell. The exhaust device of the present invention comprises a tube core exhaust platform, a sealing bottom plate is provided on the tube core exhaust platform, a support structure is provided on the sealing bottom plate, a CT tube core with a full metal shell is fixed horizontally on the support structure, and a vacuum exhaust pipeline assembly is connected to the exhaust port of the CT tube core with a full metal shell; an oven is provided directly above the sealing bottom plate, and the oven and the sealing bottom plate can be in sealed contact. The exhaust process of the present invention comprises the steps of tube installation, vacuum baking degassing, and high-pressure target practice degassing. The present invention can achieve efficient exhaust of the CT tube core with a full metal shell liquid metal bearing. During the exhaust process, the gas adsorbed in the tube is fully released and promptly extracted from the tube by vacuum heating and high-pressure target practice.

Description

Technical Field

[0001] The present invention relates to the technical field of CT tube core exhaust technology, in particular to a CT tube core exhaust device with a full metal shell and an exhaust process. Background Art

[0002] CT equipment uses precisely collimated X-ray beams, gamma rays, ultrasound, etc., together with extremely sensitive detectors to perform cross-sectional scans around a certain part of the human body one after another. It has the characteristics of fast scanning time and clear images, and can be used to detect various diseases. Among them, for CT machines, the X-ray tube core inside is the core component of the CT equipment.

[0003] During the production process, the interior of the CT tube core requires an exhaust process. This exhaust process is crucial for maintaining a good vacuum environment within the tube during normal operation and is crucial for improving the vacuum level within the tube. Therefore, a full-metal-jacketed CT tube core exhaust device and process are needed to achieve efficient exhaust of the CT tube core in a full-metal-jacketed liquid metal bearing. Summary of the Invention

[0004] The present application provides an exhaust device and exhaust process for a CT tube core with a full metal shell, which can achieve efficient exhaust of the CT tube core with a full metal shell liquid metal bearing. During the exhaust process, vacuum heating and high-pressure targeting are used to fully release the gas adsorbed in the tube and extract it from the tube in a timely manner.

[0005] The technical solutions adopted in the present invention are as follows:

[0006] A tube core exhaust device for a CT tube with a full metal shell comprises a tube core exhaust platform, a sealing bottom plate is provided on the tube core exhaust platform, a supporting structure is provided on the sealing bottom plate, a tube core of the CT tube with a full metal shell is horizontally fixed on the supporting structure, and an exhaust port of the CT tube core with a full metal shell is connected to a vacuum exhaust pipeline assembly; an oven is provided directly above the sealing bottom plate, and the oven and the sealing bottom plate can be in sealing contact; a cathode cooling fan and an anode cooling fan are respectively provided on the tube core exhaust platform, the cathode cooling fan faces the cathode end of the tube core of the CT tube with a full metal shell, and the anode cooling fan faces the anode stator end of the tube core of the CT tube with a full metal shell; an active cooling air pipe is provided on the tube core exhaust platform, the front end of the active cooling air pipe extends into the inner hole of a liquid metal bearing, an air pipe flange is provided on the active cooling air pipe, the air pipe flange is located at one end of the inner hole of the liquid metal bearing, and a plurality of heat dissipation holes are provided on the air pipe flange that pass through from front to back.

[0007] Furthermore, the vacuum exhaust pipeline assembly includes an exhaust copper tube, one end of the exhaust copper tube is connected to the exhaust port of the CT tube core with a full metal shell, the other end of the exhaust copper tube is connected to one end of the bellows, the other end of the bellows is connected to one end of the exhaust elbow, the other end of the exhaust elbow is connected to one end of the exhaust riser, the other end of the exhaust riser passes through the tube core exhaust platform and is connected to a vacuum pump, the vacuum pump is fixed on the bottom end surface of the tube core exhaust platform, and a vacuum gauge is connected to the exhaust riser.

[0008] Furthermore, an inert gas inlet is provided on the sealing bottom plate, and inert gas can be introduced into the sealed space formed by the oven and the sealing bottom plate through the inert gas inlet.

[0009] Furthermore, the support structure includes a tube core fixing plate, on which the tube core fixing plate is connected to the tube core of the CT tube with a full metal shell by multiple bolts, and the anode stator coil is connected to the tube core of the CT tube with a full metal shell. A coil fixing bracket is provided on one side of the tube core fixing plate, and the anode stator coil is connected to the coil fixing bracket by bolts. The tube core fixing plate and the coil fixing bracket are fixed to the second support plate, and the second support plate is fixed to the first support plate by a connecting piece, and the first support plate is fixed to the sealing bottom plate by a connecting piece.

[0010] Furthermore, a lifting mechanism is connected on both sides of the oven, and the lifting mechanism includes two screw nut seats respectively connected to the left and right sides of the oven, the two screw nut seats are respectively connected to the upper ends of the two lifting screws, and the lower ends of the two lifting screws are respectively connected to one end of the two commutators. The two commutators are connected and rotate synchronously through a transmission shaft, and a worm gear elevator is connected to the transmission shaft. The middle part of the lifting screw is rotatably connected to the sleeve through a bearing, and the sleeve is detachably connected to the tube core exhaust table through a connecting piece.

[0011] Furthermore, a first temperature sensor is provided on the exhaust copper pipe, a second temperature sensor is provided on the back of the CT bulb tube core of the full metal shell, and a third temperature sensor is provided on the window of the CT bulb tube core of the full metal shell.

[0012] Furthermore, an infrared thermometer is provided on the top of the anode cooling fan, facing the liquid metal bearing, and the infrared thermometer can monitor the temperature of the liquid metal bearing.

[0013] A process for exhausting a core of a CT tube with a full metal shell includes the following steps:

[0014] Tube installation: Fix the full-metal-jacketed CT tube core on the tube core exhaust platform, connect the vacuum exhaust pipeline assembly to the exhaust interface of the full-metal-jacketed CT tube core, lower the position of the oven so that the oven and the sealing bottom plate on the tube core exhaust platform are in sealing contact, so that the full-metal-jacketed CT tube core is in a sealed environment;

[0015] Vacuum baking and degassing: Turn on the vacuum pump, which will vacuum and degas the inside of the CT tube core through the connected vacuum exhaust pipeline assembly. At the same time, turn on the oven to bake and degas the CT tube core with a full metal shell. The oven temperature is maintained between 200°C and 300°C for 4 to 6 hours. After the baking is completed, wait until the temperature drops below 30°C, raise the oven, and the vacuum baking and degassing is completed.

[0016] High-voltage target practice and degassing: The anode stator coil is energized to make the rotor of the full-metal shell CT tube core rotate at high speed. The full-metal shell CT tube core performs high-voltage target practice. The heat released during the high-voltage target practice causes the anode to heat up and degas.

[0017] Furthermore, during vacuum baking and degassing, nitrogen is introduced into the oven through the inert gas inlet provided on the sealing bottom plate. Nitrogen can protect the tube core shell from being oxidized during baking. The nitrogen is turned off before the oven is raised. A first temperature sensor and a vacuum gauge are provided on the vacuum exhaust pipeline assembly. The first temperature sensor is used to monitor the temperature of the vacuum exhaust pipeline assembly, and the vacuum gauge is used to monitor the vacuum degree at the position of the vacuum exhaust pipeline assembly. During vacuum baking and degassing, the vacuum degree of the CT tube core of the full metal shell is not less than 5.0x10 -3 Pa, when the vacuum degree of the CT tube core of the full metal shell is lower than 5.0x10 -3 Pa, the oven stops heating, and the vacuum degree of the CT tube core of the full metal shell is higher than 5.0x10 -3 After Pa, heating is resumed.

[0018] Furthermore, before high-pressure target shooting, the active cooling air pipe is extended into the inner hole of the liquid metal bearing. When high-pressure target shooting is carried out, nitrogen is blown in through an external air source to actively cool the liquid metal bearing. At the same time, the cathode cooling fan and the anode cooling fan are started. The cathode cooling fan and the anode cooling fan can respectively blow cold air to the cathode end and the anode end of the CT tube core of the full-metal shell for cooling, thereby realizing rapid cooling of the cathode end and the anode stator end of the CT tube core; when high-pressure target shooting is carried out, a second temperature sensor is set on the back of the CT tube core of the full-metal shell, and a third temperature sensor is set on the window of the CT tube core of the full-metal shell. The second temperature sensor and the third temperature sensor are used to monitor the outer surface temperature of the CT tube core of the full-metal shell. When the second temperature sensor is When the temperature detected by the second temperature sensor and the third temperature sensor exceeds 100°C, the voltage and current of the CT tube core of the full-metal shell are reduced, the cooling time of the CT tube core of the full-metal shell is extended, and the rotation speed of the CT tube core of the full-metal shell is increased and reduced. When the temperature detected by the second temperature sensor and the third temperature sensor exceeds 130°C, the voltage and current are stopped from being loaded to the CT tube core of the full-metal shell, and the rotation speed of the CT tube core of the full-metal shell is maintained. When high-voltage target shooting is performed, a sound vibration analyzer is connected to the surface of the CT tube core of the full-metal shell to monitor the tube core rotation speed. The sound vibration analyzer can detect in real time whether the actual number of revolutions of the liquid metal bearing is consistent with the controlled number of revolutions. When an abnormal situation occurs, the voltage and current loading is stopped in time to prevent damage to the target disk surface.

[0019] The beneficial effects of the present invention are as follows:

[0020] The present invention can achieve efficient exhaust of the CT tube core of the full-metal shell liquid metal bearing. During the exhaust process, the gas adsorbed in the tube is fully released and extracted from the tube in time by vacuum heating and high-pressure shooting. The present invention adopts a sound vibration analyzer connected to the surface of the CT tube core A of the full-metal shell to monitor the tube core rotation speed. The sound vibration analyzer can detect in real time whether the actual speed of the liquid metal bearing is consistent with the control speed. When an abnormal situation occurs, the loading of voltage and current is stopped in time to prevent damage to the target disk surface. The present invention monitors the tube core temperature during high-pressure shooting through the second temperature sensor and the third temperature sensor, thereby ensuring that the voltage and current of the tube core of the full-metal shell CT tube are within the normal working range, avoiding frequent sparks in the tube core due to excessive temperature, causing damage to the tube core and high-voltage equipment. During vacuum baking and degassing, the present invention introduces inert gas to protect the tube core shell from being oxidized during baking. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of the exhaust equipment of the present invention.

[0022] Figure 2This is a three-dimensional diagram of the exhaust device of the present invention after removing the oven.

[0023] Figure 3 It is a top view of the exhaust equipment of the present invention.

[0024] Figure 4 It is a half-section view of the liquid metal bearing of the present invention.

[0025] Among them: 1. Tube core exhaust table; 2. Oven; 3. Sealing bottom plate; 4. First support plate; 5. Second support plate; 6. Tube core fixing plate; 7. Coil fixing bracket; 8. Lifting screw; 9. Screw nut seat; 10. Sleeve; 11. Commutator; 12. Drive shaft; 13. Exhaust copper pipe; 14. Bellows; 15. Exhaust elbow; 16. Vacuum pump; 17. Vacuum gauge; 18. Cathode cooling fan; 19. Anode cooling fan; 20. Active cooling air pipe; 21. Air pipe flange; 22. First temperature sensor; 23. Second temperature sensor; 24. Third temperature sensor; 25. Infrared thermometer; A. CT tube core with full metal shell; B. Anode stator coil; C. Liquid metal bearing. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0027] like Figure 4 As shown, a CT tube core A with a full metal shell is provided with a liquid metal bearing C in the CT tube core A with a full metal shell, and the tail end of the CT tube core A with a full metal shell is connected to the anode stator coil B.

[0028] like Figure 1 As shown, a full-metal shell CT tube core exhaust device includes a tube core exhaust platform 1, a sealing base plate 3 is provided on the tube core exhaust platform 1, a supporting structure is provided on the sealing base plate 3, a full-metal shell CT tube core A is horizontally fixed on the supporting structure, and a vacuum exhaust pipeline assembly is connected to the exhaust port of the full-metal shell CT tube core A.

[0029] like Figure 1 As shown, oven 2 is positioned directly above sealing base plate 3. Oven 2 and sealing base plate 3 form a sealed contact, thereby sealing the full-metal-jacketed CT tube core A. A lifting mechanism is connected to both sides of oven 2, which can move oven 2 up and down to adjust its height, thereby achieving a sealed contact between oven 2 and sealing base plate 3.

[0030] like Figure 2As shown, the vacuum exhaust piping assembly includes an exhaust copper tube 13. One end of the exhaust copper tube 13 is connected to the exhaust port of the full-metal-jacketed CT tube core A. The other end of the exhaust copper tube 13 is connected to one end of a bellows 14, which in turn is connected to one end of an exhaust elbow 15. The other end of the exhaust elbow 15 is connected to one end of an exhaust riser. The other end of the exhaust riser passes through the tube core exhaust platform 1 and is connected to a vacuum pump 16, which is fixed to the bottom end surface of the tube core exhaust platform 1. A vacuum gauge 17 is connected to the exhaust riser to detect the vacuum level within the exhaust riser. The length of the bellows 14 is adjustable to accommodate the exhaust of full-metal-jacketed CT tube cores A of different specifications, increasing the versatility of the equipment. During vacuum degassing, the vacuum pump 16 evacuates the full-metal-jacketed CT tube core A through the pipeline to achieve vacuum exhaust.

[0031] An inert gas inlet is provided on the sealing bottom plate 3, through which inert gas can be introduced into the sealed space formed by the oven 2 and the sealing bottom plate 3. When baking and degassing are performed, the oven 2 is filled with inert gas, which can effectively protect the tube core shell from being oxidized during baking.

[0032] like Figure 2 As shown, the support structure includes a tube core fixing plate 6, to which the full-metal-cased CT tube core A is connected via multiple bolts. The full-metal-cased CT tube core A is connected to the anode stator coil B. A coil fixing bracket 7 is provided on one side of the tube core fixing plate 6, to which the anode stator coil B is connected via bolts. Both the tube core fixing plate 6 and the coil fixing bracket 7 are made of insulating materials, effectively isolating high voltage.

[0033] like Figure 2 As shown, the tube core fixing plate 6 and the coil fixing bracket 7 are fixed on the second support plate 5, the second support plate 5 is fixed on the first support plate 4 through a connecting piece, and the first support plate 4 is fixed on the sealing bottom plate 3 through a connecting piece.

[0034] like Figure 2 As shown, the lifting mechanism includes two screw nut mounts 9 connected to the left and right sides of the oven 2. The two screw nut mounts 9 are connected to the upper ends of two lifting screws 8, the lower ends of which are connected to one end of two commutators 11. The two commutators 11 are connected for synchronous rotation via a transmission shaft 12, to which a worm gear elevator is connected. The middle portion of the lifting screws 8 is rotatably connected to a sliding sleeve 10 via a bearing. The sliding sleeve 10 is detachably connected to the tube core exhaust platform 1 via a connector.

[0035] like Figure 2 and Figure 3As shown, a cathode cooling fan 18 and an anode cooling fan 19 are respectively installed on the tube core exhaust station 1. The cathode cooling fan 18 faces the cathode end of the full-metal shell CT tube core A, and the anode cooling fan 19 faces the anode stator end of the full-metal shell CT tube core A. During operation, the cathode cooling fan 18 and the anode cooling fan 19 can simultaneously blow cold air to the cathode end and the anode end of the full-metal shell CT tube core A, respectively, to cool the cathode end and the anode stator end of the CT tube core, thereby achieving rapid cooling of the cathode end and the anode stator end of the CT tube core.

[0036] like Figure 3 and Figure 4 As shown, an active cooling air pipe 20 is provided on the tube core exhaust platform 1. The front end of the active cooling air pipe 20 can extend into the inner hole of the liquid metal bearing C to dissipate heat from the interior of the liquid metal bearing C. The active cooling air pipe 20 is provided with an air pipe flange 21. The air pipe flange 21 is located at one end of the inner hole of the liquid metal bearing C. The air pipe flange 21 is provided with multiple heat dissipation holes extending from front to back. External cold air enters the inner hole of the liquid metal bearing C through the inner hole of the active cooling air pipe 20, and is then dissipated into the external environment through the heat dissipation holes on the air pipe flange 21.

[0037] like Figure 2 and Figure 3 As shown, a first temperature sensor 22 is provided on the exhaust copper tube 13, and the first temperature sensor 22 is used to monitor the temperature inside the exhaust copper tube 13. A second temperature sensor 23 is provided on the back of the full-metal-jacketed CT tube core A, and a third temperature sensor 24 is provided on the window of the full-metal-jacketed CT tube core A. The first temperature sensor 22, the second temperature sensor 23, and the third temperature sensor 24 are used to monitor the temperature during baking and high-pressure target practice.

[0038] like Figure 2 and Figure 3 As shown, an infrared thermometer 25 is provided on the top of the anode cooling fan 19 , and the infrared thermometer 25 faces the liquid metal bearing C. The infrared thermometer 25 can monitor the temperature of the liquid metal bearing C.

[0039] A process for exhausting a core of a CT tube with a full metal shell includes the following steps:

[0040] 1. Tube installation: Figure 2 As shown, the CT tube core A with a full metal shell is fixed on the tube core exhaust platform 1, and the exhaust interface of the CT tube core A with a full metal shell is connected to the vacuum exhaust pipeline assembly; the position of the oven 2 is lowered so that the oven 2 and the sealing bottom plate 3 on the tube core exhaust platform 1 are in sealing contact, so that the CT tube core A with a full metal shell is in a sealed environment.

[0041] 2. Vacuum Degassing: Vacuum pump 16 is activated, and vacuum pump 16 degasses the interior of CT tube core A through the connected vacuum exhaust piping assembly. Simultaneously, oven 2 is activated to degas the metal-clad CT tube core A. Multiple electric heating elements are installed around and on the top of oven 2. When powered, these elements generate heat. Thermocouples are also installed inside oven 2 to monitor the internal temperature. The baking temperature of oven 2 is maintained between 200°C and 300°C for 4 to 6 hours. After the baking is complete, wait until the temperature drops below 30°C, raise oven 2, and the vacuum degassing process is complete. Simultaneously performing vacuum degassing and baking degassing improves degassing effectiveness. When baking ball bearing cores, the baking temperature is maintained between 300°C and 500°C.

[0042] During vacuum baking and degassing, an inert gas, such as nitrogen, is introduced into the oven 2 through an inert gas inlet provided on the sealing bottom plate 3. The inert gas can protect the die shell from oxidation during baking. The nitrogen is turned off before the oven 2 is raised to avoid leakage.

[0043] When the temperature is too high, high-temperature gas enters the vacuum pump through the valve of the vacuum system, causing damage to the valve and the vacuum pump interface seal ring, resulting in leakage. The instantaneous destruction of vacuum will cause the dynamic balance of the vacuum pump blades to fail, damaging the vacuum pump. A large amount of air enters the tube core, causing internal oxidation and scrapping the tube core. Therefore, the first temperature sensor 22 and vacuum gauge 17 are installed on the vacuum exhaust pipeline assembly. The first temperature sensor 22 is used to monitor the temperature of the vacuum exhaust pipeline assembly, and the vacuum gauge 17 is used to monitor the vacuum degree at the location of the vacuum exhaust pipeline assembly. During vacuum baking and degassing, the vacuum degree of the full-metal shell CT tube core A shall not be less than 5.0x10 -3 Pa, when the vacuum degree of the CT tube core A of the full metal shell is lower than 5.0x10 -3 Pa, oven 2 stops heating, and the vacuum degree of the CT tube core A of the full metal shell is higher than 5.0x10 -3 After Pa, heating is resumed.

[0044] 3. High-voltage target practice degassing: Energize the anode stator coil B to make the rotor of the full-metal shell CT tube core A rotate at high speed. The full-metal shell CT tube core A performs high-voltage target practice. The heat released during the high-voltage target practice causes the anode to heat up and degas, further improving the degassing effect.

[0045] Before high-voltage target practice, an active cooling air pipe 20 is inserted into the inner bore of the liquid metal bearing C of the full-metal-jacketed CT tube core A. During high-voltage target practice, nitrogen is blown in from an external air source to actively cool the liquid metal bearing C. Simultaneously, the cathode cooling fan 18 and the anode cooling fan 19 are activated, simultaneously blowing cold air toward the cathode and anode ends of the full-metal-jacketed CT tube core A, respectively, to rapidly cool the cathode and anode stator ends of the CT tube core.

[0046] During high-voltage target shooting, radiation will be generated, so the present invention needs to be placed in a lead room environment to prevent the human body from being exposed to radiation.

[0047] During high-voltage target practice, the back of the full-metal-jacketed CT tube core A is farthest from the window of the full-metal-jacketed CT tube core A, so the temperature is the lowest there. A second temperature sensor 23 is located on the back of the full-metal-jacketed CT tube core A. The window of the full-metal-jacketed CT tube core A generates the most heat and has the highest temperature. A third temperature sensor 24, located on the window of the full-metal-jacketed CT tube core A, is used to monitor the temperature during baking.

[0048] The second and third temperature sensors 23 and 24 monitor the outer surface temperature of the full-metal-jacketed CT tube die A. When the temperature detected by the second and third temperature sensors 23 and 24 exceeds 100°C, the voltage and current applied to the full-metal-jacketed CT tube die A are reduced, the cooling time of the full-metal-jacketed CT tube die A is extended, and the rotation speed of the full-metal-jacketed CT tube die A is increased or decreased. When the temperature detected by the second and third temperature sensors 23 and 24 exceeds 130°C, the voltage and current applied to the full-metal-jacketed CT tube die A are stopped, and the rotation speed of the full-metal-jacketed CT tube die A is maintained.

[0049] During high-voltage target shooting, since the all-metal casing is opaque, photoelectric sensors cannot be used to measure the rotational speed. Therefore, a Fast Fourier Transformer (FFT) connected to the surface of the CT tube core A of the all-metal casing is used to monitor the tube core rotational speed. The FFT can detect in real time whether the actual rotation speed of the liquid metal bearing is consistent with the controlled rotation speed (error ±5%). In the event of an abnormal situation (exceeding the error range or the bearing stops rotating), the voltage and current loading is stopped in time to prevent damage to the target surface.

[0050] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any modifications may be made within the scope of protection of the present invention.

Claims

1. A CT tube core exhaust device with a full metal shell, comprising a tube core exhaust station (1), characterized in that: A sealing bottom plate (3) is provided on the tube core exhaust platform (1), a supporting structure is provided on the sealing bottom plate (3), a tube core of a CT tube with a full metal shell is horizontally fixed on the supporting structure, and a vacuum exhaust pipeline assembly is connected to the exhaust port of the tube core of the CT tube with a full metal shell; A drying oven (2) is arranged directly above the sealing bottom plate (3), and the drying oven (2) and the sealing bottom plate (3) can be in sealed contact; a cathode cooling fan (18) and an anode cooling fan (19) are respectively arranged on the tube core exhaust platform (1), the cathode cooling fan (18) faces the cathode end of the CT tube core of the full metal shell, and the anode cooling fan (19) faces the anode stator end of the CT tube core of the full metal shell; an active cooling air pipe (20) is arranged on the tube core exhaust platform (1), the front end of the active cooling air pipe (20) extends into the inner hole of the liquid metal bearing, and the active cooling air pipe (20) is provided. 0) is provided with an air pipe flange (21), the air pipe flange (21) is located at one end of the inner hole of the liquid metal bearing, and a plurality of heat dissipation holes are provided on the air pipe flange (21) that penetrate the front and back sides; the vacuum exhaust pipeline assembly includes an exhaust copper pipe (13), one end of the exhaust copper pipe (13) is connected to the exhaust port of the CT tube core of the full metal shell, the other end of the exhaust copper pipe (13) is connected to one end of the bellows (14), the other end of the bellows (14) is connected to one end of the exhaust elbow (15), the other end of the exhaust elbow (15) is connected to one end of the exhaust riser, and the other end of the exhaust riser passes through the tube core exhaust platform (1 ) is connected to a vacuum pump (16), the vacuum pump (16) is fixed to the bottom end surface of the tube core exhaust table (1), and the exhaust vertical pipe is connected to a vacuum gauge (17); an inert gas inlet is provided on the sealing bottom plate (3), and an inert gas can be introduced into the sealed space formed by the oven (2) and the sealing bottom plate (3) through the inert gas inlet; the supporting structure includes a tube core fixing plate (6), a tube core of a CT tube with a full metal shell is connected to the tube core fixing plate (6) through a plurality of bolts, an anode stator coil is connected to the tube core of the CT tube with a full metal shell, and a coil fixing plate (6) is provided on one side of the tube core fixing plate (6). The coil fixing bracket (7) is connected to the anode stator coil via bolts, the tube core fixing plate (6) and the coil fixing bracket (7) are fixed to the second support plate (5), the second support plate (5) is fixed to the first support plate (4) via a connector, and the first support plate (4) is fixed to the sealing bottom plate (3) via a connector; a first temperature sensor (22) is provided on the exhaust copper tube (13), a second temperature sensor (23) is provided on the back of the tube core of the CT tube with a full metal shell, and a third temperature sensor (24) is provided on the window of the tube core of the CT tube with a full metal shell.

2. The full-metal-shell CT tube core exhaust device according to claim 1, characterized in that: The two sides of the oven (2) are connected to a lifting mechanism, which comprises two screw nut seats (9) respectively connected to the left and right sides of the oven (2), the two screw nut seats (9) respectively connected to the upper ends of two lifting screws (8), the lower ends of the two lifting screws (8) respectively connected to one end of two commutators (11), the two commutators (11) are connected and rotate synchronously through a transmission shaft (12), the transmission shaft (12) is connected to a worm gear elevator, the middle part of the lifting screw (8) is rotatably connected to a sliding sleeve (10) through a bearing, and the sliding sleeve (10) is detachably connected to the tube core exhaust platform (1) through a connecting piece.

3. The full-metal-shell CT tube core exhaust device according to claim 2, characterized in that: An infrared thermometer (25) is provided on the top of the anode cooling fan (19), and the infrared thermometer (25) faces the liquid metal bearing. The infrared thermometer (25) can monitor the temperature of the liquid metal bearing.

4. A process for exhausting a core of a full-metal-jacketed CT tube, applied to the exhaust device for a core of a full-metal-jacketed CT tube as claimed in any one of claims 1 to 3, characterized in that: The steps include: Tube installation: fix the tube core of the full metal shell CT tube on the tube core exhaust platform (1), connect the vacuum exhaust pipeline assembly to the exhaust interface of the full metal shell CT tube core, lower the position of the oven (2) so that the oven (2) and the sealing bottom plate (3) on the tube core exhaust platform (1) are in sealing contact, so that the tube core of the full metal shell CT tube is in a sealed environment; Vacuum baking and degassing: the vacuum pump (16) is turned on, and the vacuum pump (16) vacuums and degasses the inside of the CT tube core through the connected vacuum exhaust pipe assembly. At the same time, the oven (2) is turned on to bake and degas the CT tube core of the full metal shell. The baking temperature of the oven (2) is maintained within 200°C to 300°C, and the baking time is maintained for 4 to 6 hours. After the baking is completed, the temperature is lowered to below 30°C, and the oven (2) is raised, and the vacuum baking and degassing is completed; High-voltage target practice and degassing: The anode stator coil is energized to make the rotor of the full-metal shell CT tube core rotate at high speed. The full-metal shell CT tube core performs high-voltage target practice. The heat released during the high-voltage target practice causes the anode to heat up and degas.

5. The exhaust process for a full-metal-jacketed CT tube core according to claim 4, characterized in that: During vacuum baking and degassing, nitrogen is introduced into the oven (2) through an inert gas inlet provided on the sealing bottom plate (3). Nitrogen can protect the tube core shell from being oxidized during baking. The nitrogen is closed before the oven (2) is raised. A first temperature sensor (22) and a vacuum gauge (17) are provided on the vacuum exhaust pipeline assembly. The first temperature sensor (22) is used to monitor the temperature of the vacuum exhaust pipeline assembly. The vacuum gauge (17) is used to monitor the vacuum degree at the position of the vacuum exhaust pipeline assembly. During vacuum baking and degassing, the vacuum degree of the tube core of the full metal shell CT tube is not less than 5.0x10 -3 Pa, when the vacuum degree of the CT tube core of the full metal shell is lower than 5.0x10 -3 Pa, the oven (2) stops heating, and the vacuum degree of the CT tube core of the full metal shell is higher than 5.0x10 -3 After Pa, heating is resumed.

6. The exhaust process for a CT tube core with a full metal shell as claimed in claim 5, characterized in that: Before high-pressure shooting, the active cooling air pipe (20) is extended into the inner hole of the liquid metal bearing. During high-pressure shooting, nitrogen is blown into the liquid metal bearing through an external air source to actively cool the liquid metal bearing. At the same time, the cathode cooling fan (18) and the anode cooling fan (19) are started. The cathode cooling fan (18) and the anode cooling fan (19) can simultaneously blow cold air to the cathode end and the anode end of the CT tube core of the full metal shell respectively for cooling, thereby achieving rapid cooling of the cathode end and the anode stator end of the CT tube core. During high-pressure shooting, a second temperature sensor (23) is set on the back of the CT tube core of the full metal shell, and a third temperature sensor (24) is set on the window of the CT tube core of the full metal shell. The second temperature sensor (23) and the third temperature sensor (24) are used to monitor the outer surface of the CT tube core of the full metal shell. When the temperature detected by the second temperature sensor (23) and the third temperature sensor (24) exceeds 100°C, the voltage and current of the CT tube core of the full metal shell are reduced, the cooling time of the CT tube core of the full metal shell is extended, and the rotation speed of the CT tube core of the full metal shell is increased and reduced. When the temperature detected by the second temperature sensor (23) and the third temperature sensor (24) exceeds 130°C, the voltage and current are stopped from being loaded on the CT tube core of the full metal shell, and the rotation speed of the CT tube core of the full metal shell is maintained. When high-voltage target shooting is performed, a sound vibration analyzer is connected to the surface of the CT tube core of the full metal shell to monitor the tube core rotation speed. The sound vibration analyzer can detect in real time whether the actual rotation number of the liquid metal bearing is consistent with the control rotation number. When an abnormal situation occurs, the voltage and current are stopped in time to prevent damage to the target disk surface.

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