CT (Computed Tomography) equipment as well as cooling liquid flow adjusting method and cooling liquid filling method for CT equipment

Abstract

The invention provides CT equipment, and relates to the field of safety inspection, the field of radiation tomography, the field of radiation source heat dissipation and other technical fields. The CT equipment comprises a rack; the rotatable part is arranged on the rack, and the rotatable part is configured to rotate around the rotation axis of the rotatable part; the scanning device comprises a radiation source and a detector which are oppositely mounted on the rotatable part; the cooling assembly is arranged on the rotatable part, the cooling assembly comprises a cooling liquid box, cooling liquid in the cooling liquid box is configured to cool the radiation source, and the scanning device and the cooling assembly rotate along with the rotatable part; the body of the pressure stabilizing part is positioned in the cooling liquid tank; wherein in the rotating process of the rotatable part, under the condition that the hydraulic pressure in the cooling liquid tank changes relative to a reference value, the body deforms accordingly to compensate the hydraulic pressure in the cooling liquid tank.

Description

Technical Field

[0001] The present disclosure relates to the fields of security inspection, radiation tomography, heat dissipation of radiation sources, and other technical fields. More specifically, it relates to CT devices, a coolant flow rate adjustment method for the same, and a coolant filling method. Background Art

[0002] CT technology plays an important role in security inspection because it can eliminate the influence of object overlap. CT devices are also widely used in technical fields such as item detection. CT devices can not only detect smaller items such as luggage and airline boxes, but also larger items such as containers and vehicles.

[0003] In the related art, a CT device uses a slip ring device to obtain projection data at different angles through the rotation of a radiation source and a detector, and uses a reconstruction method to obtain tomographic images, thereby obtaining internal information of the inspected luggage items. With dual-energy or multi-energy imaging technology, current luggage item inspection devices can reconstruct the atomic number and electron density of the inspected substance, thereby realizing the identification of the substance type, and achieving good results in the detection of explosives, dangerous goods, etc.

[0004] During the process of a CT device scanning an item, the radiation source continuously emits radiation to scan the item, resulting in an increase in the temperature of the overall radiation source or its components, which affects the radiation stability and radiation effect. A cooling component can be used to dissipate heat from the radiation source.

[0005] In the process of implementing the inventive concept of the present disclosure, the inventors found that during the process of a CT device scanning an item, the cooling component and the radiation source operate in a rotating working state, and the coolant inside the cooling component is affected by the rotation and is difficult to efficiently complete the heat exchange with the radiation source. In addition, when the cooling component operates in a rotating working state, it will be in various positions and will also be affected by centrifugal force, resulting in uneven coolant flow rate inside the cooling component, which affects the heat dissipation effect. In addition, during the coolant injection stage of the cooling component, the internal structure of the cooling component is complex and may retain gas, so that the coolant is not filled, resulting in affecting the stability of the liquid flow rate during rotation and causing greater impact damage to the pipeline. Summary of the Invention

[0006] In view of the above problems, the present disclosure provides a CT device, a coolant flow rate adjustment method for the same, and a coolant filling method.

[0007] According to a first aspect of the present disclosure, a CT device is provided, comprising: a gantry; a rotatable part disposed on the gantry, the rotatable part being configured to rotate about its rotation axis; a scanning device including a radiation source and a detector oppositely mounted on the rotatable part; a cooling assembly disposed on the rotatable part, the cooling assembly including a coolant tank, and the coolant in the coolant tank being configured to cool the radiation source, wherein the scanning device and the cooling assembly rotate following the rotatable part; a pressure stabilizing member, the body of which is located in the coolant tank; wherein, during the rotation of the rotatable part, when the hydraulic pressure in the coolant tank changes relative to a reference value, the body deforms accordingly to compensate for the hydraulic pressure in the coolant tank.

[0008] According to an embodiment of the present disclosure, the pressure stabilizing member includes: the body configured to generate an elastic compressive deformation when the hydraulic pressure in the coolant tank is greater than the reference value, and generate an elastic stretching deformation when the hydraulic pressure in the coolant tank is less than the reference value; a connecting part, one end of which is hermetically connected to the body and the other end of which is hermetically connected to the side wall of the coolant tank.

[0009] According to an embodiment of the present disclosure, the connecting part has an annular flange structure and is located outside the side wall, and the body penetrates the side wall and includes a closed part, a transition section and an opening part which are connected in sequence from inside to outside; wherein, the closed part is disposed inside the coolant tank and has a closed end face; the periphery of the opening part is hermetically connected to the inner periphery of the annular flange structure; the transition section is hollow inside, one end is provided with the closed end face, and the other end opens at the opening part, forming a hollow channel penetrating the side wall.

[0010] According to an embodiment of the present disclosure, the body is configured as a corrugated structure, and a plurality of annular folds are formed on the outer wall thereof along the axial direction; the annular folds are continuously arranged between the closed part and the opening part along the axial direction of the body; wherein, the deformation section of the corrugated structure is basically accommodated inside the coolant tank.

[0011] According to an embodiment of the present disclosure, the cooling assembly further includes: a pressure stabilizing member container, the shape of which is adapted to the outer contour of the pressure stabilizing member; wherein, the pressure stabilizing member container is configured to penetrate the side wall of the coolant tank to form a chamber for accommodating the body, and the coolant is configured to enter the chamber and contact the outer surface of the body.

[0012] According to an embodiment of the present disclosure, the chamber includes: a diversion end, located inside the coolant tank and close to the closed portion, to divert the coolant into the chamber to contact the outer surface of the body; a flange connection end, located outside the coolant tank and sealingly connected to the side wall, wherein the flange connection end is configured to sealingly connect the annular flange structure and fix the annular flange structure outside the side wall.

[0013] According to an embodiment of the present disclosure, the flange connection end includes: a flange plate provided with an axially through hole communicating with the hollow channel; an annular flange, one surface of the annular flange is sealingly connected to the side wall of the coolant tank to form a sealing surface, and the other surface cooperates with the flange plate to clamp the annular flange structure to form another sealing surface.

[0014] According to an embodiment of the present disclosure, the coolant tank includes: a tank body; an observation window including a transparent window body sealingly connected to the tank body; wherein when the coolant tank rotates with the rotatable part to a target position, the observation window is located at the top of the tank body.

[0015] According to an embodiment of the present disclosure, the tank body includes: a first liquid outlet, close to the observation window, when the coolant tank rotates with the rotatable part to the target position, the first liquid outlet is located at the top of the tank body; wherein the first liquid outlet is configured to allow the coolant and gas in the coolant tank to be discharged from the first liquid outlet when replenishing the coolant.

[0016] According to an embodiment of the present disclosure, the tank body includes: a first liquid inlet, wherein when the coolant tank rotates with the rotatable part to the target position, the first liquid inlet is located below the first liquid outlet in the direction of gravity.

[0017] According to an embodiment of the present disclosure, the CT device further includes a filling tool, and the filling tool includes: a coolant container configured to contain the coolant to be injected into the coolant tank, wherein the coolant container includes a second liquid inlet and a second liquid outlet located below the second liquid inlet in the direction of gravity; a first pump body connected to the coolant container and configured to evacuate the inside of the coolant container; wherein when the coolant tank rotates with the rotatable part to the target position, it is configured to form a closed-loop fluid circuit with the coolant, specifically including the second liquid outlet communicating with the first liquid inlet and the second liquid inlet communicating with the first liquid outlet.

[0018] According to an embodiment of the present disclosure, the cooling assembly further includes: a cooling part configured to provide a channel for the coolant to flow through, wherein the coolant absorbs the heat of the radiation source during the process of flowing through the cooling part; a radiator connected to the outflow end of the cooling part and the inflow end of the coolant tank, configured to dissipate the heat of the coolant flowing out of the cooling part, wherein the coolant after heat dissipation flows into the coolant tank; a second pump body connected to the inflow end of the cooling part and the outflow end of the coolant tank, configured to transport the coolant in the coolant tank to the cooling part.

[0019] According to an embodiment of the present disclosure, the cooling assembly further includes: a flow meter disposed between the radiator and the cooling part, configured to detect the flow rate of the coolant flowing out of the cooling part; a first temperature sensor disposed between the second pump body and the cooling part, configured to detect the temperature of the coolant flowing into the cooling part; a second temperature sensor disposed between the radiator and the cooling part, configured to detect the temperature of the coolant flowing out of the cooling part, wherein the difference between the temperature of the coolant flowing into the cooling part and the temperature of the coolant flowing out of the cooling part constitutes the liquid temperature difference between the inlet and outlet of the cooling part.

[0020] According to an embodiment of the present disclosure, the cooling assembly further includes: a rotation adjustment mechanism disposed on the second pump body, configured to adjust the output power of the second pump body by a rotation angle displacement; a pump control unit communicatively connected to at least one of the flow meter, the first temperature sensor, and the second temperature sensor, configured to control the rotation angle of the rotation adjustment mechanism based on the coolant flow rate and the liquid temperature difference between the inlet and outlet of the cooling part.

[0021] According to an embodiment of the present disclosure, the cooling assembly further includes a pipeline structure, including: a heat exchange channel section whose pipe wall is configured to be thermally conductively connected to the radiation source; a liquid distribution section configured to provide a coolant flow channel between the coolant tank, the second pump body, the cooling part, and the radiator; wherein the elastic modulus of the pipeline structure is greater than or equal to 1 Mpa.

[0022] Another aspect of the embodiments of the present disclosure provides a method for adjusting the coolant flow rate for a CT device as described in any one of the above. Wherein, when the CT device scans the object to be examined, the cooling assembly rotates with the rotatable part; the method includes: during the process of the cooling assembly rotating with the rotatable part, collecting the liquid temperature difference between the inlet and outlet of the cooling part of the cooling assembly and the flow rate of the coolant flowing out, wherein the cooling part is configured to provide a channel for the coolant to flow through, and wherein the coolant absorbs the heat of the radiation source in the CT device during the process of flowing through the cooling part; adjusting the flow rate of the coolant delivered to the cooling part based on the liquid temperature difference between the inlet and outlet of the cooling part and the flow rate of the coolant flowing out.

[0023] Another aspect of the embodiments of the present disclosure provides a coolant filling method for a CT device as described in any one of the above. In this method, when the CT device is not scanning the object to be examined, the method includes: driving the rotatable part to rotate to drive the coolant tank to a target position, so that the first liquid inlet of the coolant tank is located below the first liquid outlet in the direction of gravity; constructing a closed-loop fluid circuit between the coolant tank and the coolant container, which includes connecting the second liquid outlet of the coolant container to the first liquid inlet, and the second liquid inlet to the first liquid outlet, where the second liquid outlet is located below the second liquid inlet in the direction of gravity; controlling the first pump body to evacuate the interior of the coolant container until the coolant inside the coolant container flows back into the coolant container through the closed-loop fluid circuit.

[0024] According to the embodiments of the present disclosure, after the coolant inside the coolant container flows back into the coolant container through the closed-loop fluid circuit, the method further includes: obtaining the height of the coolant liquid level at the observation window; when the height of the coolant liquid level does not reach the predetermined height, injecting the coolant through the liquid replenishment port of the coolant tank until the height of the coolant liquid level reaches the predetermined height.

[0025] The above one or more embodiments have the following beneficial effects:

[0026] 1. A CT device is provided, in which the cooling component rotates with the rotatable part, and the body of the pressure stabilizing part is arranged in the coolant tank of the cooling component. During the rotation of the rotatable part, when the hydraulic pressure in the coolant tank changes relative to the reference value, the body undergoes elastic deformation accordingly to compensate for the hydraulic pressure in the coolant tank. Therefore, it is possible to achieve self-sensing - self-regulating closed-loop control of the coolant pressure in the rotating field, making the overall hydraulic pressure of the cooling component tend to be stable, and the liquid volume and flow rate of the coolant at each position will be more uniform, effectively exchanging heat with the radiation source and improving the heat dissipation effect.

[0027] 2. A coolant flow rate adjustment method for a CT device is provided. By embedding thermodynamic parameters such as the temperature difference between the inlet and outlet liquids of the cooling part and the flow rate of the outflowing coolant into the control loop, active optimization of the coolant flow rate is achieved. It is possible to dynamically adjust the coolant flow rate in combination with the influence of centrifugal force on the flow rate distribution during the scanning process of the CT device, and achieve higher temperature control accuracy for the radiation source.

[0028] 3. A coolant filling method for a CT device is provided. The liquid inlet of the coolant tank is located downstream of the liquid outlet, using gravity to assist the flow of the liquid. Since the gas is lighter and may rise to a higher position, with such a layout, it may be easier to discharge the gas during filling. Moreover, a closed-loop circuit is constructed to connect the coolant container and the coolant tank. During vacuum pumping, the coolant can be forced to circulate to help carry away the residual gas, avoiding gas accumulation in the complex structure of the cooling component and reducing the impact of bubbles on the flow stability. Due to sufficient liquid filling, the liquid flow is more stable, reducing the impact of cavitation or pressure fluctuations on the pipeline and extending the pipeline life. Description of the Drawings

[0029] Through the following description of the embodiments of the present disclosure with reference to the drawings, the above-mentioned content and other objects, features, and advantages of the present disclosure will become clearer. In the drawings:

[0030] Figure 1 Schematically shows a partial structure diagram of a CT device according to an embodiment of the present disclosure;

[0031] Figure 2 Schematically shows Figure 1 the state where the rotatable part in

[0032] Figure 3 rotates by a certain angle;

[0033] Figure 4 Schematically shows a structure diagram of a coolant tank according to an embodiment of the present disclosure;

[0034] Figure 5 Schematically shows a cross-sectional view of a voltage stabilizer region according to an embodiment of the present disclosure;

[0035] Figure 6 Schematically shows a structure diagram of a voltage stabilizer according to an embodiment of the present disclosure;

[0036] Figure 7 Schematically shows a structure diagram of a coolant tank according to another embodiment of the present disclosure;

[0037] Figure 8 Schematically shows a block diagram of a filling tool closed-loop fluid circuit according to an embodiment of the present disclosure;

[0038] Figure 9 Schematically shows a block diagram of a cooling component according to an embodiment of the present disclosure;

[0039] Figure 10 Schematically shows a flowchart of a coolant flow rate adjustment method according to an embodiment of the present disclosure; and

[0040] Figure 11The flowchart of the coolant filling method according to an embodiment of the present disclosure is schematically shown.

[0041] The reference numerals involved in the above-mentioned drawings include:

[0042] 100, CT device; 110, rack; 120, rotatable part; 121, rotatable body; 122, rotatable track; 131, radiation source; 132, detector; 140, cooling assembly; 141, coolant tank; 1411, box body; 1412, observation window; 1413, first liquid outlet; 1414, first liquid inlet; 1415, liquid replenishing port; 142, radiator; 143, pipeline structure; 144, cooling part; 145, second pump body; 1451, pump control unit; 1452, rotation adjustment mechanism; 146, flowmeter; 147, first temperature sensor; 148, second temperature sensor; 150, voltage stabilizer; 151, body; 1511, closed part; 1512, transition section; 1513, opening; 152, connecting part; 410, voltage stabilizer container; 411, chamber; 4111, diversion end; 412, flange connection end; 4121, annular flange; 810, filling tooling; 811, first pump body; 812, coolant container; 8121, second liquid outlet; 8122, second liquid inlet.

[0043] It should be noted that, for clarity, in the drawings used to describe the embodiments of the present disclosure, the dimensions of the overall / local structure or overall / local area may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. Detailed implementation manners

[0044] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present disclosure. In the following detailed description, for the sake of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, obviously, one or more embodiments can also be implemented without these specific details. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present disclosure.

[0045] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "including", "comprising", etc. used herein indicate the presence of features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0046] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those of ordinary skill in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0047] In the case of using expressions such as "at least one of A, B, and C, etc.", generally, it should be interpreted according to the meaning commonly understood by those of ordinary skill in the art (for example, "a system having at least one of A, B, and C" should include, but not be limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.).

[0048] Figure 1 Schematically shows a CT device 100 according to an embodiment of the present disclosure. Figure 2 Schematically shows an embodiment according to the present disclosure Figure 1 in a state where the rotatable part 120 of the CT device 100 rotates by a certain angle. Figure 3 Schematically shows a front view of the rotatable part 120 according to an embodiment of the present disclosure.

[0049] It should be noted that Figure 1 and Figure 2 The examples shown are only examples to which the embodiments of the present disclosure can be applied, to help those of ordinary skill in the art understand the technical content of the present disclosure, but it does not mean that the embodiments of the present disclosure cannot be included or used in other devices, systems, environments or scenarios.

[0050] As Figures 1 to 3 shown, the CT device 100 includes a gantry 110, a rotatable part 120, a scanning device, and a cooling component 140. The CT device 100 further includes a voltage stabilizer 150 ( Figure 1 and Figure 2 not shown).

[0051] The gantry 110 serves as a base for supporting other components of the CT device 100. The rotatable part 120 is disposed on the gantry 110, and the rotatable part 120 is configured to rotate about its rotation axis. The scanning device includes a radiation source 131 and a detector 132. Both the radiation source 131 and the detector 132 are disposed on the rotatable part 120, and the radiation source 131 and the detector 132 are disposed opposite to each other along the radial direction of the rotatable part 120. For example, the radiation source 131 is disposed on the first circumferential side of the rotatable part 120, and the detector 132 is disposed on the second circumferential side opposite to the first circumferential side, so as to adjust the center of gravity of the entire rotating part including the cooling component 140, the radiation source 131, and the detector 132 to the rotation axis, so that when the rotatable part 120 drives the cooling component 140, the radiation source 131, and the detector 132 to rotate, no vibration occurs or the generated vibration is small.

[0052] The rotatable part 120 may include at least one rotatable track 122 and a rotatable body 121, and the scanning device and the cooling component 140 are arranged on the rotatable body 121. For example, the rotatable body 12151 may be arranged in a circular ring shape, which is more convenient for the relative arrangement of the radiation source 131 and the detector 132 of the scanning device on the one hand, and is also more convenient for rotation control on the other hand. However, the embodiments of the present disclosure are not limited thereto, and the rotatable body 121 only needs to be convenient for arranging the scanning device and the scanning channel. The rotatable track 122 may also be a circular track, for example.

[0053] When the object to be inspected passes through the inspection channel, the radiation source 131 can emit X-rays to penetrate the object to be inspected, and the X-rays penetrating the object to be inspected can be projected onto the detector 132 arranged opposite to the radiation source 131, and thus a CT image can be formed. For example, the object to be inspected may be a small item (such as a luggage item), a large cargo (such as a container), a vehicle or an aircraft, etc. The embodiments of the present disclosure do not make special restrictions on the specific type of the object to be inspected.

[0054] In some embodiments, the cooling component 140 includes a coolant tank 141, and the coolant in the coolant tank 141 is configured to cool the radiation source 131. Wherein, when the object to be inspected passes through the inspection channel, the scanning device and the cooling component 140 rotate following the rotatable part 120; the body 151 of the pressure stabilizing member 150 is located in the coolant tank 141; wherein, during the rotation of the rotatable part 120, when the hydraulic pressure in the coolant tank 141 changes relative to the reference value, the body 151 deforms accordingly to compensate for the hydraulic pressure in the coolant tank 141, for example, to stabilize the hydraulic pressure to the reference value.

[0055] The coolant includes a fluid that can generate heat exchange, such as water or a liquid with a mixed composition. The pressure stabilizing member 150 includes an adjusting component with elastic deformation ability, such as an elastic container including a variable volume cavity, for compensating for hydraulic pressure fluctuations. The reference value is a hydraulic parameter measured in the coolant tank 141, such as 0.5 MPa, which is only an example. When the hydraulic pressure maintains the reference value, the coolant everywhere in the cooling component 140 is evenly distributed, and a better cooling effect can be achieved.

[0056] For example, the pressure stabilizing member 150 may include silicone rubber, fluororubber or plastic corrugated pipe, etc., and its structure may include one or a combination of a solid cylinder type, an airbag type, a laminated type, a pleated type and a corrugated pipe. For example, if the pressure stabilizing member 150 is of the airbag type, it can be fixed to the top of the coolant tank 141 and sealed by a flange; for example, if the pressure stabilizing member 150 is of the corrugated pipe type, it can be integrated on the side wall of the liquid tank, and its deformation direction is generally consistent with the tangent direction of the rotatable track.

[0057] Exemplarily, the situations where the body 151 of the pressure stabilizing member 150 is deformed may include: stabilizing the pressure by using the self-elastic deformation generated by the interaction between the body 151 of the pressure stabilizing member 150 itself and the hydraulic pressure. For example, the body 151 is a plastic member. Alternatively, external intervention may be performed. For example, the magnitude of the centrifugal force is predicted based on the rotational speed signal of the rotatable portion 120 (such as the encoder feedback), and the deformation degree of the body 151 is adjusted in real time in combination with the pressure sensor. For example, the compression amount of the bellows is driven to be adjusted. Alternatively, the self-elastic deformation of the body 151 of the pressure stabilizing member 150 and external intervention may be combined. For example, the internal air pressure of the airbag is adjusted by inflating and deflating the airbag to control the deformation amount. Among them, the airbag itself can undergo elastic deformation, and external intervention can be performed by inflating and deflating the airbag.

[0058] According to the CT device 100 provided by the embodiments of the present disclosure, its cooling assembly 140 rotates following the rotatable portion 120. The body 151 of the pressure stabilizing member 150 is disposed in the coolant tank 141 of the cooling assembly 140. During the rotation of the rotatable portion 120, when the hydraulic pressure in the coolant tank 141 changes relative to the reference value, the body 151 generates an elastic deformation accordingly to compensate for the hydraulic pressure in the coolant tank 141. Therefore, the self-sensing-self-adjusting closed-loop control of the coolant pressure in the rotating field can be achieved, so that the overall hydraulic pressure of the cooling assembly 140 tends to be stable, the liquid volume and flow rate of the coolant at each position will be more uniform, and heat exchange with the radiation source 131 can be effectively performed to improve the heat dissipation effect.

[0059] Taking the example of stabilizing the pressure by using the self-elastic deformation generated by the interaction between the body 151 of the pressure stabilizing member 150 itself and the hydraulic pressure is described below.

[0060] In some embodiments, the pressure stabilizing member 150 includes a body 151 and a connecting portion 152. The body 151 is configured to generate an elastic compression deformation when the hydraulic pressure in the coolant tank 141 is greater than the reference value, and generate an elastic stretching deformation when the hydraulic pressure in the coolant tank 141 is less than the reference value; one end of the connecting portion 152 is hermetically connected to the body 151, and the other end is hermetically connected to the side wall of the coolant tank 141.

[0061] For example, the body 151 and the connecting portion 152 may be integrally formed and are both made of a plastic material, such as a rubber material. The body 151 is the deformable main part of the pressure stabilizing member 150, and the hydraulic pressure is adjusted by its own elastic deformation. The connecting portion 152 includes components fixedly connected to the coolant tank 141, such as a flange, a welded joint, etc.

[0062] Among them, when the hydraulic pressure in the coolant tank 141 is greater than the reference value, it can be when it is greater than a certain value. For example, it is 0.05 Mpa greater than the reference value (only for example). When the hydraulic pressure in the coolant tank 141 is less than the reference value, it can be when it is less than a certain value. For example, it is 0.03 Mpa less than the reference value (only for example).

[0063] According to an embodiment of the present disclosure, by the body 151 of the pressure stabilizing member 150 elastically deforming itself in response to the change of hydraulic pressure to stabilize the hydraulic pressure, a real-time, efficient, accurate, and automatic pressure stabilizing effect can be achieved.

[0064] Figure 4 Schematically shows a structural diagram of the coolant tank 141 according to an embodiment of the present disclosure. Figure 5 Schematically shows a cross-sectional view of the pressure stabilizing member area according to an embodiment of the present disclosure. Figure 6 Schematically shows a structural diagram of the pressure stabilizing member 150 according to an embodiment of the present disclosure.

[0065] In some embodiments, as Figures 4 to 6 shown, the connecting portion 152 has an annular flange structure and is located outside the side wall. The body 151 penetrates the side wall and includes a closed portion 1511, a transition section 1512, and an opening portion 1513 that are connected in sequence from the inside to the outside; among them, the closed portion 1511 is arranged inside the coolant tank 141 and has a closed end face; the periphery of the opening portion 1513 is hermetically connected to the inner periphery of the annular flange structure. The transition section 1512 is hollow inside, one end is provided with a closed end face, and the other end opens at the opening portion 1513, forming a hollow channel that penetrates the side wall.

[0066] Among them, the connecting portion 152 having an annular flange structure can enhance the stability and sealing performance of the connection. The end face of the closed portion 1511 can bear the action of force under different instantaneous hydraulic pressures during rotation and stabilize the pressure through elastic deformation. The side wall refers to a single-sided side wall of a certain side of the coolant tank 141. The closed portion 1511, the transition section 1512, and the opening portion 1513 that are connected in sequence from the inside of the coolant tank to the outside of the coolant tank form a channel that is closed at one end and open at the other end, which can make the hollow channel inside the pressure stabilizing member communicate with the outside air, increase the contact area with the air, and assist the coolant in heat dissipation. In some embodiments, it can also make the body 151 contact the outside air, or an air circulation auxiliary device such as a fan to enhance the heat dissipation effect.

[0067] The sealing connection involved in the embodiments of the present disclosure can include using a rubber gasket and connecting or welding through bolts, etc., and applying a sealing adhesive to achieve.

[0068] In some embodiments, as Figures 5 to 6As shown, the main body 151 is configured as a corrugated structure, and a plurality of annular folds are formed on its outer wall at intervals along the axial direction; the annular folds are continuously arranged between the closed part 1511 and the opening part 1513 along the axial direction of the main body 151; among them, the deformed section of the corrugated structure is basically accommodated inside the coolant tank 141.

[0069] The annular folds can enable the main body 151 to have a larger range of telescopic amount, and can also be in full contact with the coolant, so that the main body 151 can adapt to different hydraulic pressures of the coolant tank 141 and deform adaptively, such as the increase or decrease of the distance between adjacent annular folds. The deformed part of the corrugated structure is basically accommodated inside the coolant tank 141, can directly exchange heat with the coolant, and at the same time uses its telescopic property to quickly adapt to the hydraulic pressure change inside the coolant tank 141, realizing efficient voltage stabilization.

[0070] In some embodiments, as Figures 4 to 5 shown, the cooling assembly 140 further includes: a voltage stabilizing element container 410, whose shape is adapted to the outer contour of the voltage stabilizing element 150; among them, the voltage stabilizing element container 410 is configured to penetrate the side wall of the coolant tank 141 to form a chamber 411 for accommodating the main body 151, and the coolant is configured to enter the chamber 411 to be in contact with the outer surface of the main body 151.

[0071] The chamber 411 of this embodiment includes a space for accommodating the voltage stabilizing element 150 formed after the voltage stabilizing element container 410 penetrates the side wall of the coolant tank 141. When the main body 151 of the voltage stabilizing element 150 is accommodated in the chamber 411, there is a gap between the side wall of the chamber 411 and the voltage stabilizing element 150 for the coolant to enter to apply pressure to the main body 151 of the voltage stabilizing element 150.

[0072] The voltage stabilizing element container 410 can provide a stable support and installation environment for the voltage stabilizing element 150, prevent the voltage stabilizing element 150 from shaking during operation, and prevent the voltage stabilizing element 150 (such as a rubber sleeve) from being damaged due to excessive deformation or too large deformation after deformation, improving its voltage stabilizing effect.

[0073] In some embodiments, as Figure 5 shown, the chamber 411 includes a diversion end 4111 and a flange connection end 412. The diversion end 4111 is located inside the coolant tank 141 and is close to the closed part 1511, and its end is open to divert the coolant into the chamber 411 to be in contact with the outer surface of the main body 151; the flange connection end 412 is located outside the coolant tank 141 and is hermetically connected to the side wall, among which, the flange connection end 412 is configured to be hermetically connected to an annular flange structure to fix the annular flange structure outside the side wall.

[0074] In some embodiments, the flange connection end 412 includes a flange plate ( Figure 5(not shown) and an annular flange 4121. An axial through-hole is provided in the middle of the flange and is communicated with the hollow channel. One side of the annular flange 4121 is hermetically connected to the side wall of the coolant tank 141 to form a sealing surface, and the other side cooperates with the edge of the flange to clamp the annular flange structure to form another sealing surface.

[0075] Referring to Figure 5 The flange is in the shape of a circular disc. The communication between the axial through-hole and the hollow channel enables the inside of the voltage stabilizer 150 to communicate with the outside air. The hermetic connection between one side of the annular flange 4121 and the side wall of the coolant tank 141 to form a sealing surface can prevent the coolant from leaking to the outside from the connection between the coolant tank 141 and the flange connection end 412, ensuring the sealing performance of the coolant tank 141 and maintaining the normal operation of the cooling system. The flange cooperates with the annular flange 4121 to firmly clamp the annular flange structure outside the side wall of the coolant tank 141, enhancing the stability of the connection of the entire cooling assembly 140 and further preventing the coolant from leaking from the connection.

[0076] Figure 7 Schematically shows a structural diagram of a coolant tank according to another embodiment of the present disclosure.

[0077] In some embodiments, as Figure 7 shown, the coolant tank 141 includes a tank body 1411 and an observation window 1412. The observation window 1412 includes a transparent window body hermetically connected to the tank body 1411. Wherein, when the coolant tank 141 rotates to the target position with the rotatable part 120, the observation window 1412 is located at the top of the tank body 1411.

[0078] The observation window 1412 provides a way for the operator or an external camera to directly observe the internal situation of the coolant tank 141, facilitating timely understanding of the state of the coolant. Referring to Figure 2 and Figure 7 which shows the target position of the coolant tank 141. At this target position, the height of the coolant tank 141 is convenient for manual operation and for manually observing the liquid level height inside the coolant tank 141 through the observation window 1412. Liquid level scale lines can be engraved on the observation window 1412 to facilitate the operator to more accurately judge the amount of coolant.

[0079] In the related art, it is impossible to display the liquid position inside the coolant tank 141. Then, when the filling is not full and gas is left, the flow rate is likely to be unstable.

[0080] According to the embodiments of the present disclosure, the observation window 1412 is located at the top of the tank body 1411, which can observe whether the coolant is full, whether there is coolant consumption during use, and also facilitate observing whether there are bubbles.

[0081] In some embodiments, asFigure 7 As shown, the housing 1411 includes a first liquid outlet 1413. The first liquid outlet 1413 is close to the observation window 1412. When the coolant tank 141 rotates to the target position with the rotatable part 120, the first liquid outlet 1413 is located at the top of the housing 1411. Among them, the first liquid outlet 1413 is configured to allow the coolant and gas in the coolant tank 141 to be discharged from the first liquid outlet 1413 when replenishing the coolant.

[0082] In some embodiments, as Figure 7 shown, the housing 1411 includes a first liquid inlet 1414. Among them, when the coolant tank 141 rotates to the target position with the rotatable part 120, the first liquid inlet 1414 is located below the first liquid outlet 1413 in the direction of gravity.

[0083] According to the embodiments of the present disclosure, when replenishing the coolant, the coolant can flow in from the first liquid inlet, and the gas and excess coolant in the tank can be discharged from the first liquid outlet 1413 above, ensuring the high efficiency and smoothness of the coolant replenishment process and effectively discharging the gas.

[0084] Figure 8 Schematically shows a block diagram of the closed-loop fluid circuit of the filling tool 810 according to the embodiments of the present disclosure.

[0085] In some embodiments, as Figure 8 shown, the CT device 100 further includes a filling tool 810. The filling tool 810 includes a coolant container 812 and a first pump body 811. The coolant container 812 is configured to hold the coolant to be injected into the coolant tank 141. Among them, the coolant container 812 includes a second liquid inlet 8122 and a second liquid outlet 8121 located below the second liquid inlet 8122 in the direction of gravity. The first pump body 811 is connected to the coolant container 812 and is configured to evacuate the inside of the coolant container 812. Among them, with reference to Figure 2 and Figure 7 , when the coolant tank 141 rotates to the target position with the rotatable part 120, it is configured to form a closed-loop fluid circuit with the coolant, specifically including the second liquid outlet 8121 communicating with the first liquid inlet 1414 and the second liquid inlet 8122 communicating with the first liquid outlet 1413.

[0086] The vacuum pumping operation can, when filling the coolant, utilize the air pressure difference to make the coolant flow into the coolant tank 141 more quickly, while preventing air from mixing into the coolant during the filling process, ensuring the normal operation of the cooling system. The closed-loop fluid circuit makes the coolant filling process smoother. The excess coolant and gas can flow back into the coolant container 812, avoiding waste of coolant and environmental pollution, and further ensuring the stable operation of the cooling assembly 140. Additionally, the liquid level height inside the coolant tank 141 can be measured through the observation window 1412. In the case of reflux but still having bubbles, a liquid replenishment tooling is used to replenish the coolant through the liquid replenishment hole on the coolant tank 141 until the observed liquid level rises to the specified height, thus completing the liquid filling. In some embodiments, it can be rotated at multiple angles so that the coolant tank 141 stays at multiple positions to avoid air retention.

[0087] Figure 9 Schematically shows a block diagram of a cooling assembly 140 according to an embodiment of the present disclosure.

[0088] In some embodiments, such as Figure 9 shown, the cooling assembly 140 further includes a cooling part 144, a radiator 142, and a second pump body 145. The cooling part 144 is configured to provide a channel for the coolant to flow through. Among them, during the process of the coolant flowing through the cooling part 144, it absorbs the heat of the radiation source 131; the radiator 142 is connected to the outflow end of the cooling part 144 and the inflow end of the coolant tank 141, and is configured to dissipate the heat of the coolant flowing out of the cooling part 144. Among them, the coolant after heat dissipation flows into the coolant tank 141; the second pump body 145 is connected to the inflow end of the cooling part 144 and the outflow end of the coolant tank 141, and is configured to transport the coolant in the coolant tank 141 to the cooling part 144.

[0089] The radiator 142 can adopt methods such as air-cooled heat dissipation or water-cooled heat dissipation. In the case where the radiation source 131 is an accelerator, the cooling part 144 can include pipes outside the acceleration tube or can also include liquid flow channels opened on the tube wall of the acceleration tube. The second pump body 145 provides power for the overall coolant circulation of the cooling assembly 140 and can control the liquid flow rate in the pipeline through a knob and software.

[0090] According to an embodiment of the present disclosure, the coolant tank 141, the cooling part 144, the radiator 142, and the second pump body 145 constitute a cooling circulation loop, effectively cooling the radiation source 131, ensuring the stable operation of the core components of the CT device, and avoiding equipment failures caused by overheating. Through efficient heat dissipation and coolant circulation, the reliability and stability of the cooling assembly 140 are improved.

[0091] In some embodiments, such as Figure 9 shown, the cooling assembly 140 further includes:

[0092] A flowmeter 146 is disposed between the radiator 142 and the cooling unit 144 and is configured to detect the flow rate of the coolant flowing out of the cooling unit 144;

[0093] A first temperature sensor 147 is disposed between the second pump body 145 and the cooling unit 144 and is configured to detect the temperature of the coolant flowing into the cooling unit 144;

[0094] A second temperature sensor 148 is disposed between the radiator 142 and the cooling unit 144 and is configured to detect the temperature of the coolant flowing out of the cooling unit 144. The difference between the temperature of the coolant flowing into the cooling unit 144 and the temperature of the coolant flowing out of the cooling unit 144 constitutes the temperature difference between the inlet and outlet liquids of the cooling unit 144.

[0095] The flowmeter 146, the first temperature sensor 147, and the second temperature sensor 148 can be installed on the coolant tank 141 to save occupied space.

[0096] In some embodiments, the cooling assembly 140 further includes a rotation adjustment mechanism 1452 and a pump control unit 1451. The rotation adjustment mechanism 1452 is disposed on the second pump body 145 and is configured to adjust the output power of the second pump body 145 by a rotation angle displacement. The pump control unit 1451 is communicatively connected to at least one of the flowmeter 146, the first temperature sensor 147, and the second temperature sensor 148 and is configured to control the rotation angle of the rotation adjustment mechanism 1452 based on the coolant flow rate and the temperature difference between the inlet and outlet liquids of the cooling unit 144.

[0097] For example, the rotation adjustment mechanism 1452 can be set in the form of a knob, and the rotation speed of the pump per unit time is adjusted by rotating to different angles corresponding to different gears to achieve the adjustment of the output power. The rotation angle displacement is the angular displacement change amount of the rotation adjustment mechanism 1452 relative to the reference position. For example, when the knob rotates from 0° to 45°, the displacement is +45°, and the gear is in the second gear (for example only). During the rotation of the rotatable part 120 and the emission of rays by the radiation source 131, the pump control unit 1451 can dynamically optimize the pump body power based on the real-time data of the temperature difference (ΔT) and the flow rate (Q). For example, when ΔT exceeds the threshold, the rotation angle is increased to increase the flow rate; and / or when Q is less than the threshold, the angle displacement is increased to increase the flow rate.

[0098] For example, when Q is less than 5 L / min and lasts for 3 seconds, and / or ΔT < 5 °C lasts for 2 seconds, the PID algorithm control is triggered, and the target angle increment Δθ = +15° is calculated; the rotation adjustment mechanism 1452 drives the knob to rotate from 45° to 60°, and the pump speed is increased from 2500 RPM to 3500 RPM; alternatively, a temperature difference - flow rate - angle mapping table can also be set, and the rotation angle is controlled by looking up the table according to at least one of the measured temperature difference and flow rate.

[0099] According to the embodiments of the present disclosure, during the operation of the radiation source 131, the actual heat dissipation requirement can be matched, the flow rate can be adjusted in a timely manner, and a better heat dissipation effect can be achieved.

[0100] In some embodiments, the cooling assembly 140 further includes a pipeline structure 143, including: a heat exchange channel section, the pipe wall of which is configured to be thermally conductively connected to the radiation source 131; a liquid distribution section, configured to provide a coolant circulation channel between the coolant tank 141, the second pump body 145, the cooling part 144, and the radiator 142; wherein, the elastic modulus of the pipeline structure 143 is greater than or equal to 1 Mpa.

[0101] The heat exchange channel section includes a pipeline part arranged in the acceleration tube area and thermally conductively connected to the radiation source 131, and the liquid distribution section includes pipeline parts connected between the coolant tank 141, the second pump body 145, the cooling part 144, and the radiator 142.

[0102] Since the cooling assembly 140 rotates with the rotatable part 120, during the rotation process, the pipeline structure 143 is affected by hydraulic pressure, and the pipeline material should have good pressure resistance. By adopting the pipeline structure 143 with an elastic modulus greater than or equal to 1 Mpa, good pressure resistance can be achieved, preventing the pipeline from deforming or rupturing, and ensuring the reliability of the cooling assembly 140. Moreover, quick plug-in connectors can be used for all connectors in the pipeline, and all connectors are provided with leak-proof structures, avoiding liquid leakage during the rotation process.

[0103] Based on the CT device 100 of the above various embodiments, the present disclosure also provides a coolant flow rate adjustment method and a coolant injection method for the above CT device 100.

[0104] Figure 10 A flowchart of the coolant flow rate adjustment method according to the embodiments of the present disclosure is schematically shown.

[0105] In some embodiments, when the CT device 100 scans the object to be inspected, the cooling assembly 140 rotates with the rotatable part 120; as Figure 10 shown, this embodiment includes:

[0106] In operation S1010, during the rotation of the cooling assembly 140 with the rotatable part 120, the temperature difference between the inlet and outlet liquids of the cooling part 144 of the cooling assembly 140 and the flow rate of the outflowing coolant are collected, wherein the cooling part 144 is configured to provide a coolant circulation channel, and during the process of the coolant flowing through the cooling part 144, the heat of the radiation source 131 in the CT device 100 is absorbed;

[0107] In operation S1020, based on the temperature difference between the inlet and outlet liquids of the cooling part 144 and the flow rate of the outflowing coolant, the flow rate of the coolant delivered to the cooling part 144 is adjusted.

[0108] Reference Figure 7 、 Figure 8 and Figure 9 By using the flowmeter 146 to collect the flow rate of the coolant flowing out of the cooling section 144, the temperature difference between the inlet and outlet of the cooling section 144 can be obtained according to the difference between the collection results of the first temperature sensor 147 and the second temperature sensor 148. The pump control unit 1451 can control the rotation angle of the knob based on the coolant flow rate and the temperature difference between the inlet and outlet of the cooling section 144, so as to adjust the coolant flow rate delivered to the cooling section 144.

[0109] According to the embodiments of the present disclosure, based on the heat generation situation (such as temperature difference) and flow parameters of the radiation source 131 during actual operation, the flow rate of the coolant pumped into the cooling section 144 for heat exchange with the radiation source 131 can be adjusted in real time and accurately, improving the response speed and cooling efficiency, and avoiding overheating and damage of the radiation source 131 caused by insufficient cooling or energy waste caused by excessive cooling. Further enhances the stability and reliability of the cooling assembly 140.

[0110] Figure 11 Schematically shows a flowchart of a coolant filling method according to an embodiment of the present disclosure.

[0111] In some embodiments, when the CT device 100 is not scanning the object to be inspected, as Figure 11 shown, this embodiment includes:

[0112] In operation S1110, drive the rotatable part 120 to rotate to drive the coolant tank 141 to the target position, so that the first liquid inlet 1414 of the coolant tank 141 is located below the first liquid outlet 1413 in the direction of gravity;

[0113] In operation S1120, a closed-loop fluid circuit between the coolant tank 141 and the coolant container 812 is constructed, which includes connecting the second liquid outlet 8121 of the coolant container 812 to the first liquid inlet 1414, and the second liquid inlet 8122 to the first liquid outlet 1413. Among them, the second liquid outlet 8121 is located below the second liquid inlet 8122 in the direction of gravity;

[0114] In operation S1130, control the first pump body 811 to evacuate the inside of the coolant container 812 until the coolant inside the coolant container 812 flows back into the coolant container 812 through the closed-loop fluid circuit.

[0115] According to an embodiment of the present disclosure, when the CT device is not scanning the object to be examined, the cooling component 140 can be efficiently and safely maintained and the coolant can be replenished. By utilizing the principles of gravity and air pressure difference, the flow and circulation of the coolant are accelerated, improving the operation efficiency. The construction of the closed-loop fluid circuit avoids the leakage and waste of the coolant, ensures the tightness and stability of the cooling system, and can gradually discharge the gas from bottom to top.

[0116] In some embodiments, after the coolant inside the coolant container 812 returns to the inside of the coolant container 812 via the closed-loop fluid circuit, it further includes: obtaining the height of the cooling liquid level at the position of the observation window 1412; in the case where the height of the cooling liquid level does not reach the predetermined height, injecting coolant through the liquid replenishment port 1415 of the coolant tank 141 until the height of the cooling liquid level reaches the predetermined height.

[0117] For example, the height of the cooling liquid level can be observed manually. Or a camera captures an image of the liquid level at the position of the observation window 1412, and by means of image recognition, it is determined whether the liquid level height reaches the target scale line. Or a liquid level sensor, such as an ultrasonic liquid level sensor, is installed near the observation window 1412, and the height of the cooling liquid level is measured using the principle of ultrasonic wave reflection.

[0118] When the computer determines that the height of the cooling liquid level does not reach the predetermined height, a prompt message is issued, such as displaying a prompt pop-up window on the operation interface or emitting an alarm sound. The operator prepares the coolant and manually injects the coolant through the liquid replenishment port 1415 until the height of the cooling liquid level precisely reaches the predetermined height and no bubbles are found in the observation window 1412. If an automatic liquid replenishment device is used, the computer can control the flow rate and time of the liquid replenishment tooling according to the liquid level data to accurately replenish the coolant until the height of the cooling liquid level reaches the predetermined height.

[0119] According to an embodiment of the present disclosure, obtaining the height of the cooling liquid level and replenishing the liquid in a timely manner ensures the sufficiency of the coolant in the cooling system and the full discharge of the gas, effectively avoiding problems such as unstable hydraulic pressure and flow rate during rotation due to insufficient coolant and the presence of bubbles, causing impacts on various components of the cooling component 140, as well as a decrease in cooling effect and overheating of the device.

[0120] Those skilled in the art can understand that the features described in the various embodiments of the present disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in the present disclosure. In particular, without departing from the spirit and teachings of the present disclosure, the features described in the various embodiments of the present disclosure can be combined and / or combined in various ways. All such combinations and / or combinations fall within the scope of the present disclosure.

[0121] The embodiments of the present disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments have been described separately above, this does not mean that the measures in each embodiment cannot be used advantageously in combination. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art can make various substitutions and modifications, and all such substitutions and modifications should fall within the scope of the present disclosure.

Claims

1. A CT device, comprising: A gantry; A rotatable part, arranged on the gantry, and configured to rotate around its rotation axis; A scanning device, including a radiation source and a detector oppositely mounted on the rotatable part; A cooling component, arranged on the rotatable part, the cooling component includes a coolant tank, and the coolant in the coolant tank is configured to cool the radiation source, wherein the scanning device and the cooling component rotate following the rotatable part; A pressure stabilizing part, whose body is located in the coolant tank; Wherein, during the rotation of the rotatable part, when the hydraulic pressure in the coolant tank changes relative to the reference value, the body deforms accordingly to compensate for the hydraulic pressure in the coolant tank.

2. The CT device according to claim 1, characterized in that, The pressure stabilizing part includes: The body, configured to generate elastic compressive deformation when the hydraulic pressure in the coolant tank is greater than the reference value, and generate elastic stretching deformation when the hydraulic pressure in the coolant tank is less than the reference value; A connecting part, one end of which is hermetically connected to the body, and the other end is hermetically connected to the side wall of the coolant tank.

3. The CT device according to claim 2, wherein The connecting part is in an annular flange structure and is located outside the side wall, the body penetrates the side wall and includes a closed part, a transition section and an opening part connected in sequence from inside to outside; Wherein, The closed part is arranged inside the coolant tank and has a closed end face; The periphery of the opening part is hermetically connected to the inner periphery of the annular flange structure; The transition section is hollow inside, one end is provided with the closed end face, and the other end opens at the opening part, forming a hollow channel penetrating the side wall.

4. The CT device according to claim 3, wherein The body is constructed as a corrugated structure, and a plurality of annular folds are formed on its outer wall along the axial direction at intervals; The annular folds are continuously arranged between the closed part and the opening part along the axial direction of the body; Wherein, the deformation section of the corrugated structure is basically accommodated inside the coolant tank.

5. The CT device according to claim 4, characterized in that, The cooling component further includes: A pressure stabilizing part container, whose shape fits the outer contour of the pressure stabilizing part; Wherein, the pressure stabilizing part container is configured to penetrate the side wall of the coolant tank to form a chamber for accommodating the body, and the coolant is configured to enter the chamber and contact the outer surface of the body.

6. The CT device according to claim 5, wherein, The chamber includes: A diversion end, located inside the coolant tank and close to the closed part, to divert the coolant into the chamber to contact the outer surface of the body; A flange connection end, located outside the coolant tank and hermetically connected to the side wall, wherein the flange connection end is configured to hermetically connect the annular flange structure and fix the annular flange structure outside the side wall.

7. The CT device according to claim 6, characterized in that, The flange connection end includes: A flange plate, provided with an axially through hole communicated with the hollow channel; An annular flange, one side of the annular flange is hermetically connected to the side wall of the coolant tank to form a sealing surface, and the other side cooperates with the flange plate to clamp the annular flange structure to form another sealing surface.

8. The CT device according to claim 1, characterized in that, The coolant tank includes: A box body; Observation window, including a transparent window body hermetically connected to the box body; Wherein, when the coolant tank rotates to the target position with the rotatable part, the observation window is located at the top of the box body.

9. The CT device according to claim 8, wherein, The box body includes: A first liquid outlet, close to the observation window. When the coolant tank rotates to the target position with the rotatable part, the first liquid outlet is located at the top of the box body; Wherein, the first liquid outlet is configured to allow the coolant and gas in the coolant tank to discharge from the first liquid outlet when replenishing the coolant.

10. The CT device according to claim 9, characterized in that, The box body includes: A first liquid inlet. When the coolant tank rotates to the target position with the rotatable part, the first liquid inlet is located below the first liquid outlet in the direction of gravity.

11. The CT device according to claim 10, wherein The CT device further includes a filling tooling, and the filling tooling includes: A coolant container configured to hold the coolant to be injected into the coolant tank. The coolant container includes a second liquid inlet and a second liquid outlet located below the second liquid inlet in the direction of gravity; A first pump body connected to the coolant container and configured to evacuate the interior of the coolant container; Wherein, when the coolant tank rotates to the target position with the rotatable part, it is configured to form a closed-loop fluid circuit with the coolant, specifically including the second liquid outlet communicating with the first liquid inlet and the second liquid inlet communicating with the first liquid outlet.

12. The CT device according to any one of claims 1 to 11, characterized in that, The cooling assembly further includes: A cooling part configured to provide a channel for the coolant to flow through. During the process of the coolant flowing through the cooling part, it absorbs the heat of the radiation source; A radiator connected to the outflow end of the cooling part and the inflow end of the coolant tank, configured to dissipate heat from the coolant flowing out of the cooling part. After heat dissipation, the coolant flows into the coolant tank; A second pump body connected to the inflow end of the cooling part and the outflow end of the coolant tank, configured to transport the coolant in the coolant tank to the cooling part.

13. The CT device according to claim 12, wherein The cooling assembly further includes: A flow meter disposed between the radiator and the cooling part, configured to detect the flow rate of the coolant flowing out of the cooling part; A first temperature sensor disposed between the second pump body and the cooling part, configured to detect the temperature of the coolant flowing into the cooling part; A second temperature sensor disposed between the radiator and the cooling part, configured to detect the temperature of the coolant flowing out of the cooling part. The difference between the temperature of the coolant flowing into the cooling part and the temperature of the coolant flowing out of the cooling part constitutes the temperature difference between the inlet and outlet liquids of the cooling part.

14. The CT device according to claim 13, characterized in that, The cooling assembly further includes: A rotation adjustment mechanism disposed on the second pump body, configured to adjust the output power of the second pump body by a rotation angle displacement; A pump control unit communicatively connected to at least one of the flow meter, the first temperature sensor, and the second temperature sensor, configured to control the rotation angle of the rotation adjustment mechanism based on the coolant flow rate and the temperature difference between the inlet and outlet liquids of the cooling part.

15. The CT device according to claim 12, characterized in that, The cooling assembly further includes a pipeline structure, including: A heat exchange channel section, the tube wall structure of which is configured to be in thermally conductive connection with the radiation source; A liquid distribution section configured to provide a coolant circulation channel among the coolant tank, the second pump body, the cooling section and the radiator; Wherein, the elastic modulus of the pipeline structure is greater than or equal to 1 Mpa.

16. A coolant flow rate adjustment method for use in the CT apparatus according to any one of claims 1 to 15, wherein, When the CT device scans the object to be inspected, the cooling assembly rotates with the rotatable part; The method includes: During the rotation of the cooling assembly with the rotatable part, collecting the temperature difference between the inlet and outlet liquids of the cooling section of the cooling assembly and the flow rate of the outflowing coolant, wherein the cooling section is configured to provide a channel for the coolant circulation, and wherein the coolant absorbs the heat of the radiation source in the CT device during the flow through the cooling section; Based on the temperature difference between the inlet and outlet liquids of the cooling section and the flow rate of the outflowing coolant, adjusting the flow rate of the coolant delivered to the cooling section.

17. A coolant filling method for the CT device according to any one of claims 1 to 15, wherein, When the CT device does not scan the object to be inspected, the method includes: Driving the rotatable part to rotate to drive the coolant tank to a target position, so that the first liquid inlet of the coolant tank is below the first liquid outlet in the direction of gravity; Constructing a closed-loop fluid circuit between the coolant tank and the coolant container, which includes connecting the second liquid outlet of the coolant container with the first liquid inlet, and the second liquid inlet with the first liquid outlet, wherein the second liquid outlet is below the second liquid inlet in the direction of gravity; Controlling the first pump body to evacuate the inside of the coolant container until the coolant inside the coolant container flows back into the coolant container through the closed-loop fluid circuit.

18. The method according to claim 17, wherein After the coolant inside the coolant container flows back into the coolant container through the closed-loop fluid circuit, the method further includes: Obtaining the height of the cooling liquid level at the observation window position; When the height of the cooling liquid level does not reach the predetermined height, injecting the coolant through the liquid filling port of the coolant tank until the height of the cooling liquid level reaches the predetermined height.

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