WO2017012466A1 - 一种工业ct扫描试验系统及流体压力加载装置 - Google Patents

一种工业ct扫描试验系统及流体压力加载装置 Download PDF

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Publication number
WO2017012466A1
WO2017012466A1 PCT/CN2016/088558 CN2016088558W WO2017012466A1 WO 2017012466 A1 WO2017012466 A1 WO 2017012466A1 CN 2016088558 W CN2016088558 W CN 2016088558W WO 2017012466 A1 WO2017012466 A1 WO 2017012466A1
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WIPO (PCT)
Prior art keywords
piston
fluid medium
chamber
sample
fluid pressure
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PCT/CN2016/088558
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English (en)
French (fr)
Inventor
鞠杨
王建强
彭瑞东
毛灵涛
刘红彬
Original Assignee
中国矿业大学(北京)
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Application filed by 中国矿业大学(北京) filed Critical 中国矿业大学(北京)
Priority to GB1710138.7A priority Critical patent/GB2550068B/en
Priority to US15/539,811 priority patent/US9880114B2/en
Publication of WO2017012466A1 publication Critical patent/WO2017012466A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
    • G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/30—Accessories, mechanical or electrical features
    • G01N2223/311—Accessories, mechanical or electrical features high pressure testing, anvil cells
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/30—Accessories, mechanical or electrical features
    • G01N2223/33—Accessories, mechanical or electrical features scanning, i.e. relative motion for measurement of successive object-parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/30—Accessories, mechanical or electrical features
    • G01N2223/33—Accessories, mechanical or electrical features scanning, i.e. relative motion for measurement of successive object-parts
    • G01N2223/3306—Accessories, mechanical or electrical features scanning, i.e. relative motion for measurement of successive object-parts object rotates
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/40—Imaging

Definitions

  • the invention relates to the field of sample scanning technology, in particular to an industrial CT scanning test system and a fluid pressure loading device.
  • Industrial CT Computer Tomography
  • the object of the present invention is to provide an industrial CT scanning test system and a fluid pressure loading device, which can realize real-time loading of test samples, improve system simulation accuracy, and can realize multi-directional loading of samples to meet test requirements. .
  • the present invention provides a fluid pressure loading device for use in an industrial CT scanning test system, comprising a body, the body having a sample receiving cavity, at least one fluid medium cavity, and each of the fluid medium A piston is disposed inside the cavity, the piston isolating the corresponding fluid medium chamber into two chambers, wherein one chamber communicates with the external hydraulic medium through an oil passage disposed inside the body, and the other chamber communicates with the chamber
  • the sample receiving cavity, and one end of each of the pistons facing the sample receiving cavity may extend into the inside of the sample receiving cavity;
  • the fluid medium chamber is specifically a first fluid medium chamber and a second fluid medium chamber, wherein the piston is specifically a first piston and a second piston, and the first piston is disposed inside the first fluid medium chamber, The second piston is disposed inside the second fluid medium chamber, and the first piston axial direction and the second piston axially are vertically arranged;
  • a process hole is further disposed on the body opposite the fluid medium chamber, the process hole having a radial dimension smaller than a radial dimension of the fluid medium cavity; and a blockage matching the corresponding process hole.
  • the fluid pressure loading device places the sample inside the body, and the volume is more compact, which is favorable for placing on the sample scanning table, and real-time adjustment of the force applied to the sample by controlling the flow rate into the fluid medium chamber, further improving the test effectiveness.
  • the fluid medium chamber further includes a third fluid medium chamber, wherein the third fluid medium chamber is further disposed with a third piston, an axial direction of the third piston, and an axial direction of the second piston ,
  • the axial direction of the first piston constitutes a three-axis coordinate system.
  • a cross-sectional dimension of the first end surface of the piston is greater than a cross-sectional dimension of the second end surface, the first end surface is an end surface facing the end of the fluid medium, and the second end surface is The end face of the end of the cavity is accommodated toward the sample.
  • the wall thickness of the body on the side of the fluid medium chamber is greater than the wall thickness of the opposite side.
  • the body is further provided with a passage connecting the lower surface and the sample receiving cavity, so that the sample is placed from the channel inside the sample receiving cavity, and the channel is There is also a blockage at the inlet end.
  • oil ports connected to the external fluid medium source are disposed on the upper end surface of the body, and each of the oil ports communicates with the corresponding fluid medium chamber through the internal oil passage.
  • the method further includes two connecting heads, wherein the upper and lower ends of the body are provided with flanges, and the connecting heads are bolted to the flanges at both ends of the body.
  • the present invention also provides an industrial CT scanning test system, comprising a test base and a multi-axis motion turntable supported by the test base, a radiation generating device, an image collecting device, a fluid pressure loading device, and a control device. ;
  • the fluid pressure loading device is the fluid pressure loading device according to any one of the above, wherein, when performing a scanning experiment, each of the fluid pressure loading devices is placed on a sample stage of the multi-axis motion turntable, and according to test requirements The samples were loaded in real time with loads in different directions.
  • the industrial CT scanning test system has the fluid pressure loading device described above, it also has the above-described technical effects of the fluid pressure loading device.
  • FIG. 1 is a schematic structural view of an industrial CT scanning test system according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a fluid pressure loading device according to a specific embodiment of the present invention.
  • FIG. 3 is a schematic structural view of a synchronous rotating device according to an embodiment of the present invention.
  • Figure 4 is a schematic structural view of a cantilever bracket
  • Figure 5 is a schematic structural view of a fixing bracket
  • Figure 6 is a schematic structural view of a rotating bracket
  • FIG. 7 is a schematic structural diagram of an automatic winder according to an embodiment of the present invention.
  • Figure 8 is a schematic view showing the assembly of the automatic winder and the sample stage.
  • the core of the invention provides an industrial CT scanning test system and a fluid pressure loading device, which can realize real-time loading of test samples, improve system simulation accuracy, and can realize multi-directional loading of samples to meet test requirements. .
  • FIG. 1 is a schematic structural diagram of an industrial CT scanning test system according to an embodiment of the present invention.
  • the invention provides an industrial CT scanning test system, which comprises a test base 9 and a multi-axis motion turntable 2 supported by the test base 9, a radiation generating device 1, an image collecting device 3. Fluid pressure loading device 4 and control device 6.
  • the multi-axis motion turntable 2 is provided with a sample stage for placing a sample, and the sample stage can be rotated relative to the test base 9 according to the test requirement or moved in a predetermined direction, and the predetermined direction described herein may be along the main beam
  • the direction that is, the movement in the front-rear direction, may also be perpendicular to the direction of the main beam in the horizontal plane, that is, in the left-right direction, or may be perpendicular to the direction of the main beam in the vertical plane, that is, the up-and-down direction; similarly, the rotation of the sample stage It may be a rotation in a vertical direction.
  • a plurality of sample stages may be provided, that is, the sample stage may specifically include a rotating sample stage, a front-rear direction moving platform, and left and right. Move the platform in the direction and move the platform up and down.
  • the operation of each sample stage can be driven by a motor, and the motor is connected to the control device 6 through a control line (power line and signal line), and the operator controls the motor by operating the control unit 6, thereby realizing the corresponding action of the sample stage.
  • the type of radiation emitted by the radiation generating device 1 is generally X-ray.
  • the X-ray is taken as an example to introduce the technical solution.
  • the radiation generating device 1 may include a ray tube, a high voltage generator 1b, and a control cabinet.
  • the X-ray has radiation, so it is generally placed inside the shielded room.
  • the ray tube is connected to the high-voltage generator 1b and the control cabinet through the high-voltage cable and the control line.
  • the control cabinet is connected to the control device 6 through the network cable, and the control device 6 can adjust the voltage of the generated ray. , current and other parameters, and training and calibration.
  • the beam-out control switch of the X-ray control cabinet is connected with the lead-door trigger and indicator light of the shielded room to ensure that the indicator light is illuminated when the radiation is emitted, and the radiation is not emitted when the lead door is opened.
  • An image capturing device 3 is disposed on an opposite side of the radiation generating device 1 for collecting the radiation emitted by the radiation generating device 1 and completing imaging of the sample according to the collected radiation; the image capturing device 3 may include a flat panel detector and a mobile platform.
  • the flat panel detector is fixed on the mobile platform, and the moving platform can be moved relative to the test base 9 along the main beam emission direction to realize imaging at different magnifications.
  • the movement of the mobile platform can be realized by the motor drive, and of course, the movement can be realized for other components.
  • the mobile platform can be fabricated by aluminum alloy profiles, including two columns, beams, ribs and other components. As long as the flat detector can be reliably supported, the movement of the moving platform can be achieved by the cooperation of the guide rail and the slider.
  • the flat panel detector is purchased according to the required model, and the parameters such as the effective area, the number of pixels, and the gray level are selected according to requirements.
  • the radiation detector in the image acquisition device 3 is not limited to the above-mentioned flat panel detector, and may be other types of detectors as long as the above functions can be realized.
  • the fluid pressure loading device 4 performs real-time loading of the specimen in different directions according to the test requirements, and when performing the scanning experiment, the fluid pressure loading device and the sample are co-located on the sample stage of the multi-axis motion turret 2.
  • the fluid may be a liquid, that is, a hydraulic oil or water, or may be a gas.
  • the fluid pressure loading device 4 can include at least one loading cylinder that effects loading of the sample pressure.
  • the samples described herein may be geotechnical samples or other types of samples.
  • the geotechnical samples are taken as an example to test the technical effects of the test system provided in this paper.
  • the industrial CT scanning test system adopts the fluid pressure loading device 4, which reduces the self-weight of the loading device as much as possible and can provide a large loading force, and can meet the requirements of the deformation and damage test of the vast majority of geomaterials, and
  • the loading cylinder of the loading device and the sample are placed together on the sample table of the multi-axis motion turret 2, and the ray scanning is performed together, and the loading force applied to the geotechnical sample by the loading cylinder can be adjusted in real time according to the test demand, thereby improving the test efficiency.
  • the loading of the specimens in different directions can be realized.
  • two loading cylinders can be set, and the loading of the specimens in two directions can be realized; setting three loading cylinders can realize three different directions of the specimens.
  • a simulation experiment in which a three-axis coordinate system is described can be realized.
  • FIG. 2 is a schematic structural view of a fluid pressure loading device according to an embodiment of the present invention; wherein, only two directions of loading, vertical direction and horizontal direction are shown in FIG.
  • the fluid pressure loading device 4 includes a body 41 having a sample receiving cavity 4a and at least one fluid medium cavity therein, and a sample receiving cavity 4a for receiving and fixing the sample.
  • Each piston medium chamber is internally provided with a piston, and the piston isolates the corresponding fluid medium chamber into two chambers, wherein one chamber communicates with the external hydraulic medium through an oil passage provided inside the body 41, and the other chamber communicates with the sample chamber.
  • the chamber 4a is placed, and one end of each piston facing the sample receiving chamber 4a can extend into the inside of the sample receiving chamber 4a; the fluid medium chamber and the piston form a loading cylinder.
  • the sample when the sample is subjected to force loading, the sample is first placed inside the body 41 of the loading device, and then the external medium source is driven to the fluid medium chamber inside the body 41 to fill the fluid medium, and the fluid flowing into the fluid medium chamber Under the pushing of the medium, the piston placed inside the fluid medium chamber moves toward the sample receiving chamber 4a. As the fluid medium is continuously injected, the piston abuts against the sample and applies a certain force to the sample.
  • the operator can calculate the pressure of the fluid medium in the pipeline, the piston area, and Calculate the force applied to the specimen to achieve the loading of the specimen force.
  • the fluid pressure loading device in the above embodiment places the sample inside the body, the volume is more compact, is favorable to be placed on the sample scanning table, and realizes the real force applied to the sample by controlling the flow rate into the fluid medium chamber. Adjust to further improve the test efficiency.
  • the sample force loading mode provides pressure in different directions through the embedded loading cylinder.
  • the pressure can reach 200 MPa, and the three-axis, two-axis, single-axis loading test can be realized, the loading device structure is relatively simple, and the volume can be Match the sample design.
  • the body 41 can be made of a high-strength lightweight aluminum alloy material, which satisfies the strength requirement of the body 41 under the large load, meets the requirements of the beam penetration during CT scanning, and reduces the weight of the can body to meet the weight of the rotating table. Restricted requirements.
  • the corresponding number of fluid medium chambers are two, respectively a first fluid medium chamber 4b and a second fluid medium chamber 4d, correspondingly
  • the piston is specifically a first piston 42 and a second piston 47, the first piston 42 is placed inside the first fluid medium chamber 4b, the second piston 47 is placed inside the second fluid medium chamber 4d, and the first piston 42 is axially
  • the second piston 47 is axially arranged perpendicularly.
  • the first piston 42 is in the horizontal direction
  • the second piston 47 is axially in the vertical direction.
  • the axial directions of the first piston 42 and the second piston 47 can be set according to the actual loading force.
  • the fluid medium chamber further includes a third fluid medium chamber, wherein the third fluid medium chamber is further provided with a third piston, an axial direction of the third piston, and an axis of the second piston
  • the axial direction of the first piston constitutes a three-axis coordinate system.
  • the piston may be designed to have a variable cross section, that is, the cross sectional dimension of the first end surface of the piston is larger than the cross sectional dimension of the second end surface,
  • the first end surface is an end surface facing the end of the fluid medium, and the second end surface is an end surface facing the end of the sample receiving chamber 4a.
  • the working pressure inside the loading cylinder is relatively small, the pressure of the tubing connection and the pump is relatively easy to satisfy, and the pressure applied to the specimen is relatively large, which is convenient for achieving a large loading force, especially for the Z direction (vertical Direction) This part does not affect the penetration of rays, and there is no special requirement for the size.
  • the body 41 adopts an asymmetric loading mode, that is, in the longitudinal section.
  • the body 41 is disposed with a wall thickness on the side of the fluid medium chamber that is greater than a wall thickness on the opposite side. As can also be seen from FIG. 2, the thickness of the body 41 on the side where the first fluid medium chamber 4b is disposed is larger than the thickness of the opposite side body 41.
  • the body 41 opposite to the fluid medium chamber is further provided with a process hole 4c, the radial size of the process hole 4c is smaller than the radial size of the fluid medium cavity, and the process hole 4c can reduce the processing difficulty of the fluid medium cavity.
  • the process hole 4c needs to be blocked by the blockage.
  • the oil ports connecting the external hydraulic medium are disposed on the upper end surface of the body 41, and the fluid medium chambers are connected through the internal passage, and are used in the body.
  • the oil path is directly processed to avoid the influence of the external oil pipe on the radiation.
  • the body 41 is further provided with a passage 4e communicating the lower surface with the sample receiving chamber 4a so that the sample is placed from the passage 4e.
  • the sample accommodates the interior of the chamber 4a, and the inlet end of the passage 4e is also provided with a blockage.
  • the upper and lower ends of the body 41 may also be provided with flanges, and the connectors are bolted to the flanges at both ends of the body 41.
  • the lower end portion is a first flange 43 and is coupled to the first connecting head 46.
  • the upper end portion is a second flange 47 and is coupled to the second connecting head 45.
  • a connecting hole can be arranged on the connecting head and the flange, and the connecting hole of the bolt passing through the two is fixed with the mating nut, thereby connecting the connecting head and the flange.
  • the connection hole 45a of the second connector 45 is shown in FIG.
  • a sealing member may be disposed between the two, and the sealing member may be a sealing ring.
  • the peripheral wall of the piston is processed with a mounting groove, and the sealing ring is placed inside the mounting groove.
  • the sample stage in each of the above embodiments can be moved or rotated relative to the test base 9, that is, the body 41 in each of the above embodiments also moves relative to the test base 9 during the test. Therefore, in order to ensure interference of the piping connecting the external oil passages of the main body 41, the following arrangement can be further made.
  • FIG. 3 is a schematic structural diagram of a synchronous rotating device according to an embodiment of the present invention
  • FIG. 4 is a schematic structural view of a cantilever bracket
  • FIG. 5 is a schematic structural view of the fixed bracket; schematic diagram.
  • the industrial CT scanning test system in the above embodiments may further be provided with a synchronous rotating device 5, which includes a fixing bracket 5d and a cantilever bracket 5b.
  • the cantilever bracket 5b is placed above the loading cylinder, and the lower end of the fixing bracket 5d is supported by On the test base 9, the upper end portion of the fixed bracket 5d is rotatably coupled to the cantilever bracket 5b in the vertical direction, that is, the cantilever bracket 5b is rotatable relative to the fixed bracket 5d in the vertical direction.
  • the cantilever bracket 5b is provided with a guide rail 5b4, a slider 5b5 that cooperates with the guide rail 5b4, and a driving component that drives the slider 5b5 to move along the guide rail 5b4; the medium line of the communication loading cylinder is limited to the slider 5b5 so that the medium pipeline can follow
  • the slider 5b5 slides relative to the guide rail 5b4 and extends downward from the position of the slider 5b5 to connect to the loading cylinder of the sample stage.
  • the control device 6 can control the action of the driving component so that the slider 5b5 is always located directly above the loading cylinder, that is, the slider 5b5 can be synchronized with the loading cylinder, so that the position of the sample table can be determined according to samples of different sizes and different magnifications.
  • the position of the slider 5b5 is adjusted in real time, so that the medium pipeline is always perpendicular to the loading cylinder, avoiding the occurrence of the winding phenomenon of the pipeline and the loading cylinder, and ensuring the normal operation of the loading cylinder.
  • the synchronous rotating device 5 may further include a multi-channel high-pressure rotator 5a fixedly coupled to the slider 5b5.
  • the multi-channel high-pressure rotator 5a specifically includes a fixed end pipe joint and a rotating end pipe joint that communicate through an internal passage, and the fixed end pipe joint passes through the oil pipe
  • the driving source is connected, and the rotating end pipe joint communicates with the loading cylinder.
  • the rotating end pipe joint can rotate synchronously with the rotation of the sample stage without hindering the rotation of the loading cylinder.
  • the driving component in the synchronous rotating device 5 may include a nut seat 5b7 of the motor, the lead screw 5b6 and the threaded end of the screw 5b6, and the threaded end of the screw 5b6 is disposed on the internal thread of the nut seat 5b7.
  • the other end is fixedly connected to the slider 5b5, and the motor drive screw 5b6 is rotated, so that the screw 5b6 drives the slider 5b5 to reciprocate.
  • the synchronous rotating device 5 of the above embodiments may further include a rotating bracket 5bc disposed between the fixed bracket 5d and the cantilever bracket 5b.
  • the fixing bracket 5d includes a column 5d1, and the bottom of the column 5d1 is supported by the test base 9, and the column 5d1 is The upper end portion is further provided with a horizontal pallet 5d4; in order to increase the reliability of the connection, the rib plate 5d5 may be further added between the horizontal pallet 5d4 and the pillar 5d1, and the lower end portion of the pillar 5d1 may further be provided with a bottom plate 5d2, the bottom plate 5d2 and the pillar 5d1 The ribs 5d3 are added between them.
  • the rotating bracket includes a center pillar 5c1.
  • the lower end portion of the center pillar 5c1 is fitted with the upper end portion of the pillar 5d1 and is circumferentially connected by a bearing 5c5.
  • the center pillar 5c1 is further fixed with a gear 5c4, and further includes a motor 5d7 for driving the gear to rotate, and the motor 5d7 Fixed to the horizontal pallet 5d4, the motor 5d7 drives the center pillar 5c1 to rotate relative to the column 5d1 through the gear 5c4; the upper end portion of the center pillar 5c1 is fixed
  • a second pallet 5c2 is fixed, and the cantilever bracket is fixed to the second pallet 5c2.
  • the rib 5c3 may be added between the center pillar and the second pallet 5c2, and at the same time, in order to increase the rotation flexibility of the center pillar 5c1, the upper end of the center pillar 5c1 may be added. Position the bearing 5c6.
  • the cantilever bracket includes two horizontal beams 5b1 extending horizontally and an end plate 5b2 and a third plate 5b3 connected to the ends of the two beams 5b1.
  • the driving member is disposed above the third plate 5b3, and the third
  • the pallet 5b3 is rotatably connected to the fixing bracket 5b, and the rail 5b4 is disposed on the upper surfaces of the two beams 5b1.
  • the rear end portion of the beam 5b1 is further provided with two parallel vertical plates 5b10, and a circular tube 5b12 is further connected between the two parallel vertical plates 5b10.
  • the circular tube 5b12 and the two parallel vertical plates 5b10 are rotatably connected by bearings 5b11, and the pipeline is placed on the circle. On the surface of the tube 5b12, when the slider slides back and forth, the pipeline can roll with the circular tube 5b12, reducing the friction between the two.
  • a stress and strain collecting device 8 may be further disposed on the test base 9 for collecting stress and strain parameters in different directions of the sample; the control device 6 is The stress strain parameter controls the pressure of the fluid medium in the fluid pressure loading device 4.
  • the stress and strain collection device 8 includes a sensor and a signal acquisition device. The sensor is disposed on the body, and the signal acquisition device is generally disposed on the test base 9 directly below the sample stage, and the signal acquisition device and the sensor are connected by a signal line or the like. In order to avoid the signal line winding when the sample stage is rotated, the following settings are also made in this paper, as described below.
  • the industrial CT scanning apparatus in each of the above embodiments may further include an automatic winder 7 disposed under the sample stage, and the automatic winder 7 includes a threaded rod 7a, a nut 7b assembly, and a winding of the upper end fixedly connected to the sample stage.
  • the bobbin 7d, the lower end portion of the threaded rod 7a extends downward through the threading hole of the multi-axis motion turret 22, and the nut 7b assembly includes a nut 7b and a positioning member for limiting the circumferential direction of the nut 7b and the multi-axis motion turret 22
  • the nut 7b is provided on the external thread portion of the threaded rod 7a, the bobbin 7d is sleeved on the threaded rod 7a and the two are axially movably connected, and the bobbin 7d is fixedly connected to the nut 7b.
  • the signal line in the loading device on the sample stage is wound around the surface of the bobbin 7d, and the signal line is wound around the surface of the bobbin 7d and then transferred to other connecting members.
  • the threaded rod 7a also rotates synchronously with the sample stage, and the nut 7b is fixed in the circumferential direction, so that the threaded rod 7a moves upward or downward, and the bobbin 7d fixed to the nut 7b also follows the nut.
  • the positioning member may be a guide rod 7f separated from the two sides of the threaded rod 7a, and a sliding plate 7c sleeved on the two guiding rods 7f and slidably connected with the guiding rod 7f.
  • the nut 7b is fixed to the sliding plate 7c. .
  • the structure is relatively simple and facilitates the setting of the nut 7b.
  • the ends of the two guiding rods 7f are further connected with a connecting plate 7g, and the connecting plate 7g is provided with a bearing 7e, and the free end of the threaded rod 7a is connected to the connecting plate 7g through the bearing 7e; the free end of the threaded rod 7a in the structure Also relative to the limit, is conducive to the stability of the rotation of the threaded rod 7a.
  • control panel 10 can be further disposed in the shielding room.
  • the control panel 10 can set the parameters of the loading device through the touch screen interface and display the loading load of the sample to complete the loading of the sample.
  • the structure of the specific control panel can refer to the existing equipment, and will not be described in detail herein.

Abstract

一种工业CT扫描试验系统及流体压力加载装置（4），该流体压力加载装置（4）包括本体（41），本体（41）内部开设有试样容置腔（4a）、至少一个流体介质腔（4b、4d），各流体介质腔（4b、4d）的内部均置有活塞（42、47），活塞（42、47）将相应流体介质腔（4b、4d）隔离为两个腔室，其中一腔室通过本体（41）内部设置的油路连通外部液压介质，另一腔室连通试样容置腔（4a），并且各活塞（4、47）朝向试样容置腔（4a）的一端可伸至试样容置腔（4a）内部；利用流入流体介质腔（4b、4d）流体介质的压力推动活塞（42、47）动作，从而实现活塞（42、47）抵靠试样并施加一定的力于试样。该加载装置（4）利用流体压力实现力加载，体积比较小，有利于放置在试样扫描台上，并且通过控制流入流体介质腔（4b、4d）的流量实现施加于试样上力的实时调节，进一步提高试验效率。

Description

一种工业CT扫描试验系统及流体压力加载装置
本申请要求于2015年07月21日提交中国专利局、申请号为201510432189.6、发明名称为“一种工业CT扫描试验系统及流体压力加载装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及试样扫描技术领域，特别涉及一种工业CT扫描试验系统及流体压力加载装置。
背景技术
工业CT(Computed Tomography)扫描技术为分析研究材料内部结构提供了有效的实验技术手段，在相关各个领域得到了广泛应用。
目前的工业CT通常是利用X射线穿透物体断面进行旋转扫描并借助高性能计算机系统实现内部图像的重建。其原理是通过特定的探测器测量X射线穿透被检物体以后的射线强度，同时完成X射线机、探测器与被检物体之间的扫描运动，从而获得重建CT图像所需的完整数据，最后按照一定的算法利用这些数据重建出物体的断面图像。
但由于工业CT扫描技术的本质特点，为了得到较好的分辨力，一方面需要尽可能减小射线束焦点大小，这就限制了射线的穿透能力；另一方面还需精心限制试样的尺寸并确保试样在扫描期间的稳定旋转，这就限制了扫描对象的尺寸规格。这些限制在很大程度上影响了CT技术在力学分析中的应用。因为力学实验离不开加载装置，而一般的加载装置通常具有比较大的体量及重量，很难直接置于工业CT机中进行扫描。故现有技术中一般采用外部加载，然后再将加载后的试样放置于CT试验台上。这种加载方式精度比较低，并且一旦加载完成，试验试样的加载载荷是不能调节的。
对于均质材料，如金属、橡胶、陶瓷等，可以采用较小的试样并借助微型加载装置来进行扫描分析，这就可以确保射线能够穿透成像并满足一定的分辨率需求。但对于岩土材料的力学加载分析，需要克服以下挑战：一是试样不能太小，否则会受到尺寸效应的影响以致无法得到所需实验结果，而试样的增大势必会引起加载装置的增大，从而带来射线穿透困难、 加载吨位增大、图像分辨率下降等一系列问题；二是加载制度往往比较复杂，为了模拟岩土材料在实际工程中的受力状况，简单的单轴拉压实验是不够的，还需进行多轴压缩、渗流、水力压裂等多种复杂加载实验，而且有时还需进行多次加载卸载程序，因此对加载装置的实现及控制有着更高的要求。
故，如何提供一种工业CT扫描试验系统，实现试样的多方向加载，满足试验需求，是本领域内技术人员亟待解决的技术问题。
发明内容
本发明的目的为提供一种工业CT扫描试验系统及流体压力加载装置，该加载装置能够实现试验试样的实时加载，提高系统模拟准确性，且可实现试样的多方向加载，满足试验需求。
为解决上述技术问题，本发明提供一种流体压力加载装置，应用于工业CT扫描试验系统，包括本体，所述本体内部开设有试样容置腔、至少一个流体介质腔，各所述流体介质腔的内部均置有活塞，所述活塞将相应所述流体介质腔隔离为两个腔室，其中一腔室通过所述本体内部设置的油路连通外部液压介质，另一腔室连通所述试样容置腔，并且各所述活塞朝向所述试样容置腔的一端可伸至所述试样容置腔内部；
所述流体介质腔具体为第一流体介质腔和第二流体介质腔，相应所述活塞具体为第一活塞和第二活塞，所述第一活塞置于所述第一流体介质腔的内部，所述第二活塞置于所述第二流体介质腔的内部，并且所述第一活塞轴向和所述第二活塞轴向垂直布置；
与所述流体介质腔相对的所述本体上还设置有工艺孔，所述工艺孔的径向尺寸小于所述流体介质腔的径向尺寸；且还包括与相应所述工艺孔匹配的堵塞。
流体压力加载装置将试样置于本体的内部，体积更加紧凑，有利于放置于试样扫描台上，并且通过控制流入流体介质腔的流量实现施加于试样上力的实时调节，进一步提高试验效率。
可选的，所述流体介质腔还包括第三流体介质腔，所述第三流体介质腔的内部还置有第三活塞，所述第三活塞的轴向、所述第二活塞的轴向、 所述第一活塞的轴向构成三轴坐标系。
可选的，沿轴向，所述活塞的第一端面的横截面尺寸大于第二端面的横截面尺寸，所述第一端面为朝向所述流体介质端部的端面，所述第二端面为朝向所述试样容置腔端部的端面。
可选的，纵截面内，所述本体设置所述流体介质腔侧的壁厚大于相对侧的壁厚。
可选的，所述本体还设置有连通下表面与所述试样容置腔的通道，以便所述试样自所述通道置于所述试样容置腔的内部，并且所述通道的入口端还设置有堵塞。
可选的，连通外部流体介质源的油口均设置于所述本体的上端面，各所述油口通过内部油道连通相应所述流体介质腔。
可选的，还包括两个连接头，所述本体的上下两端部均设置有法兰，两所述连接头通过螺栓连接所述本体两端部的法兰。
另外，本发明还提供了一种工业CT扫描试验系统，包括试验基座以及支撑于所述试验基座的多轴运动转台、射线发生装置、图像采集装置、流体压力加载装置，还包括控制装置；
所述流体压力加载装置为上述任一项所述的流体压力加载装置，当进行扫描实验时，各所述流体压力加载装置置于所述多轴运动转台的试样台上，并且根据试验需求对所述试样进行不同方向载荷的实时加载。
因该工业CT扫描试验系统具有上述流体压力加载装置，故也具有流体压力加载装置的上述技术效果。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明一种实施例中工业CT扫描试验系统的结构示意图；
图2为本发明一种具体实施例中流体压力加载装置的结构示意图；
图3为本发明一种实施例中同步旋转装置的结构示意图；
图4为悬臂支架的结构示意图；
图5为固定支架的结构示意图；
图6为旋转支架的结构示意图；
图7为本发明一种实施例中自动绕线器的结构示意图
图8为自动绕线器与试样台的装配示意图。
其中，图1至图8中部件名称与附图标记之间的一一对应关系如下所示：
射线发生装置1、高压发生器1b、多轴运动转台2、2e、图像采集装置3、流体压力加载装置4、本体41、第一活塞42、第一法兰43、第二法兰44、第二连接头45、连接孔45a、第一连接头46、第二活塞47、试样容置腔4a、流体介质腔4b、工艺孔4c、流体介质腔4d、通道4e、同步旋转装置5、多通道同步高压旋转器5a、悬臂支架5b、旋转支架5c、固定支架5d、横梁5b1、端板5b2、第三托板5b3、导轨5b4、滑块5b5、丝杠5b6、螺母座5b7、立板5b10、轴承5b11、圆管5b12、立柱5d1、底板5d2、肋板5d3、水平托板5d4、肋板5d5、电机5d7、中心柱5c1、第二托板5c2、肋板5c3、齿轮5c4、轴承5c5、轴承5c6、控制装置6、自动绕线器7、螺纹杆7a、螺母7b、滑块7c、绕线筒7d、轴承7e、导杆7f、联板7g、应力应变采集装置8、试验基座9、控制面板10。
具体实施方式
本发明的核心为提供一种工业CT扫描试验系统及流体压力加载装置，该加载装置能够实现试验试样的实时加载，提高系统模拟准确性，且可实现试样的多方向加载，满足试验需求。
为了使本领域的技术人员更好地理解本发明的技术方案，下面结合附图和具体实施例对本发明作进一步的详细说明。
请参考图1，图1为本发明一种实施例中工业CT扫描试验系统的结构示意图。
本发明提供了一种工业CT扫描试验系统，该系统包括试验基座9以及支撑于试验基座9上的多轴运动转台2、射线发生装置1、图像采集装置 3、流体压力加载装置4、控制装置6。其中，多轴运动转台2设有用于放置试样的试样台，试样台可以根据试验需求相对试验基座9转动或沿预定方向运动，此处所述的预定方向可以为沿主射线束方向，即前后方向运动，也可以为水平面内垂直于主射线束方向，即左右方向运动，也可以为竖直面内垂直于主射线束方向，即上下方向；同理，试样台的转动可以为绕竖直方向的旋转，一般地，为了实现上述旋转、不同方向的直线运动功能，可以设置多个试样台，即试样台可以具体包括旋转试样台、前后方向移动平台、左右方向移动平台、上下方向移动平台。各试样台的动作可以由电机驱动，电机通过控制线(电源线和信号线)连接控制装置6，操作人员通过操作控制装置6控制电机，进而实现试样台的相应动作。
目前射线发生装置1发出射线的类型一般为X射线，当然也可以采用其他类射线，本文以X射线为例介绍技术方案，射线发生装置1可以包括射线管、高压发生器1b、控制柜，因X射线有辐射，故一般放置于屏蔽室内部，射线管通过高压电缆、控制线与高压发生器1b及控制柜连接，控制柜通过网线与控制装置6连接，控制装置6可调节产生射线的电压、电流等参数，并进行训机及校准。为了试验人员的安全考虑，X射线控制柜的出束控制开关与屏蔽室铅门触发器及指示灯连接，确保发射射线时，指示灯点亮，铅门打开时不会发射射线。
图像采集装置3设置于所述射线发生装置1的相对侧，用于采集所述射线发生装置1发出的所述射线，并根据采集到的所述射线完成所述试样的成像；图像采集装置3可以包括平板探测器、移动平台，平板探测器固定在移动平台上，移动平台沿主射线束发射方向可相对试验基座9移动，以实现不同放大倍率的成像。其中，移动平台的移动可以由电机驱动实现，当然也可以为其他部件驱动实现移动。
移动平台可以采用铝合金型材加工制作，包括两根立柱、横梁、肋板等部件，只要能实现平板探测器的可靠支撑，移动平台的移动可以通过导轨与滑块的配合实现。平板探测器按所需型号购置，有效面积、像素数量、灰度级等参数根据需求选择。
需要说明的是，图像采集装置3中射线探测器不局限于上述平板探测器，也可以为其他类型的探测器，只要能实现上述功能即可。
流体压力加载装置4根据试验需求完成对试样进行不同方向载荷的实时加载，并且当进行扫描实验时，流体压力加载装置与试样共同置于多轴运动转台2的试样台上。流体可以为液体，即液压油或水等，也可以为气体。流体压力加载装置4可以包括至少一个加载缸，加载缸实现试样压力的加载。
本文中所述的试样可以为岩土类试样，也可以为其他类型的试样。本文以岩土类试样为例进行试验，具体说明本文所提供的试验系统的技术效果。
本文所提供的工业CT扫描试验系统采用流体压力加载装置4，尽可能降低了加载装置的自重并可提供较大的加载力，可以满足绝大数岩土类材料变形破坏试验的需求，并且该加载装置的加载缸与试样共同置于多轴运动转台2的试样台上，共同进行射线扫描，可以根据试验需求实时调节加载缸施加于岩土类试样上的加载力，提高试验效率。
并且，根据设置加载缸的数量可以实现试样不同方向力的加载，例如设置两个加载缸，可实现试样两个方向力的加载；设置三个加载缸可实现试样三个不同方向，例如可实现三轴坐标系力记载的模拟实验。
请结合参考图2，图2为本发明一种具体实施例中流体压力加载装置的结构示意图；其中，图2中仅示出了两个方向加载，竖直方向和水平方向。
具体地，在一种具体实施例中流体压力加载装置4包括本体41，本体41内部开设有试样容置腔4a、至少一个流体介质腔，试样容置腔4a用于容纳并固定试样；各流体介质腔的内部均置有活塞，活塞将相应流体介质腔隔离为两个腔室，其中一腔室通过本体41内部设置的油路连通外部液压介质，另一腔室连通试样容置腔4a，并且各活塞朝向试样容置腔4a的一端可伸至试样容置腔4a内部；流体介质腔与活塞形成加载缸。
该实施方式当对试样进行力加载时，首先将试样置于加载装置的本体41的内部，然后驱动外部介质源向本体41内部的流体介质腔内部充流体介质，在流入流体介质腔流体介质的推动下，置于流体介质腔内部的活塞朝向试样容置腔4a移动，随流体介质的不断注入，活塞抵靠试样并施加一定的力于试样。操作人员可以根据管路中流体介质的压力、活塞面积、计 算施加于试样上的力，从而实现试样力的加载。
上述实施例中的流体压力加载装置将试样置于本体的内部，体积更加紧凑，有利于放置于试样扫描台上，并且通过控制流入流体介质腔的流量实现施加于试样上力的实时调节，进一步提高试验效率。
该试样力加载方式通过嵌入式加载缸提供不同方向的压力，以液体介质为例，压力可以达到200MPa，并且可实现三轴、两轴、单轴加载试验，加载装置结构比较简单，体积可匹配试样设计。
其中，本体41可以采用高强轻质铝合金材料制造，既满足大载荷记载下本体41的强度要求，有满足CT扫描时射线穿透的要求，还降低了罐体自重以满足转台对扫描件重量限制的要求。
当施加于试样上的力为二维相互垂直方向力(两轴)时，流体介质腔相应的数量为两个，分别为第一流体介质腔4b和第二流体介质腔4d，相应所述活塞具体为第一活塞42和第二活塞47，第一活塞42置于第一流体介质腔4b的内部，第二活塞47置于第二流体介质腔4d的内部，并且第一活塞42轴向和第二活塞47轴向垂直布置。本文中第一活塞42沿水平方向，第二活塞47轴向沿竖直方向，当然，第一活塞42和第二活塞47的轴向可以根据实际加载力的需求设置。
当模拟三轴力时，流体介质腔还包括第三流体介质腔，所述第三流体介质腔的内部还置有第三活塞，所述第三活塞的轴向、所述第二活塞的轴向、所述第一活塞的轴向构成三轴坐标系。本文虽未给出第三流体介质腔的示意图，但是根据本文的文字描述，本领域内技术人员很容易理解并进行实施该技术方案。
进一步地，为了以较小的加载缸内部压力获取试样比较大的加载力，可以将活塞设计为变截面，即活塞的第一端面的横截面尺寸大于第二端面的横截面尺寸，所述第一端面为朝向流体介质端部的端面，所述第二端面为朝向所述试样容置腔4a端部的端面。
在实际试验中，加载缸内部的工作压力比较小，油管连接及泵的压力比较容易满足，而加到试样中的压力比较大，便于实现较大的加载力，尤其对于Z方向(竖直方向)该部分不影响射线穿透，对于尺寸无特殊要求。
另外，对于X,Y两个方向加载，在保证加载力大小的前提下，还要尽 量降低射线穿透时对试样产生的影响，因此本体41的外形尺寸要足够小，但必须要保证它的实验载荷，因此在加工中，本体41采用非对称加载方式，即纵截面内，本体41设置所述流体介质腔侧的壁厚大于相对侧的壁厚。从图2中也可以看出，设置第一流体介质腔4b侧的本体41厚度大于相对侧本体41的厚度。
同时与流体介质腔相对的本体41上还设置有工艺孔4c，所述工艺孔4c的径向尺寸小于流体介质腔的径向尺寸，工艺孔4c可降低流体介质腔的加工难度。当然，进行力加载实验时，工艺孔4c需要用堵塞堵住。
另外，为了确保流体介质腔内壁加工精度，为了保证加载油路对射线的影响，连通外部液压介质的油口均设置于本体41的上端面，通过内部通道连通各流体介质腔，采用在本体中直接加工出油路，这样可以避免因外接油管对射线的影响。
为了便于试样自外布置于试样容置腔4a的内部，本体41还设置有连通下表面与所述试样容置腔4a的通道4e，以便所述试样自所述通道4e置于所述试样容置腔4a的内部，并且通道4e的入口端还设置有堵塞。
为了便于本体41的安装及装配，本体41的上下两端部还可以设置法兰，连接头通过螺栓连接本体41两端部的法兰。下端部为第一法兰43与第一连接头46配合连接，上端部为第二法兰47与第二连接头45配合连接。连接头、法兰上可以设置连接孔，螺栓穿过两者的连接孔与配合螺母固定，从而实现连接头与法兰的连接。图2中给出了第二连接头45上连接孔45a。
另外，为了保证活塞与流体介质腔之间的密封，二者之间还可以设置有密封部件，密封部件可以为密封圈，活塞的周壁上加工有安装槽，密封圈置于安装槽的内部。
上述各实施例中的试样台可以相对于试验基座9运动或旋转，也就是说，上述各实施例中的本体41在试验过程中也随试验基座9相对动作。故为了保证连通本体41的外部油路的管路的干涉，可以进一步进行如下设置。
请参考图3至图6，图3为本发明一种实施例中同步旋转装置的结构示意图；图4为悬臂支架的结构示意图；图5为固定支架的结构示意图；图6为旋转支架的结构示意图。
上述各实施例中的工业CT扫描试验系统还可以设置有同步旋转装置5，同步旋转装置5包括固定支架5d、悬臂支架5b，悬臂支架5b置于加载缸的上方，固定支架5d下端部支撑于试验基座9上，固定支架5d的上端部与悬臂支架5b沿竖直方向转动连接，即悬臂支架5b可以绕竖直方向相对固定支架5d转动。
悬臂支架5b上设置有导轨5b4、与导轨5b4配合的滑块5b5以及驱动滑块5b5沿导轨5b4动作的驱动部件；连通加载缸的介质管路限位于滑块5b5上，以便介质管路可以随滑块5b5相对导轨5b4滑动，并且自滑块5b5位置向下延伸连接位于试样台的加载缸。控制装置6可以控制驱动部件动作，使滑块5b5始终位于加载缸的正上方，即滑块5b5可以与加载缸同步动作，这样可以根据不同大小的试样、不同放大倍率下试样台位置的不同，实时调节滑块5b5位置，使介质管路始终垂直于加载缸，避免管路与加载缸缠绕现象的发生，保障加载缸的正常动作。
同步旋转装置5还可以包括与滑块5b5固连的多通道高压旋转器5a，多通道高压旋转器5a具体包括通过内部通道连通的固定端管接头和旋转端管接头，固定端管接头通过油管连通驱动源，旋转端管接头连通加载缸。旋转端管接头可以随样品台的旋转而同步转动，不会阻碍加载缸的旋转。
上述各实施例中，同步旋转装置5中的驱动部件可以包括电机、丝杠5b6与丝杠5b6的螺纹端部配合的螺母座5b7，丝杠5b6的螺纹端部设于螺母座5b7的内螺纹孔内，另一端固定连接滑块5b5，电机驱动丝杠5b6转动，从而实现丝杠5b6带动滑块5b5往复运动。
其中，上述各实施例的同步旋转装置5还可以包括设置于固定支架5d和悬臂支架5b之间的旋转支架5bc，固定支架5d包括立柱5d1，立柱5d1底部支撑于试验基座9，立柱5d1的上端部还设有水平托板5d4；为了增加连接的可靠性，水平托板5d4与立柱5d1之间还可以增加肋板5d5，立柱5d1的下端部还可以设置底板5d2，底板5d2与立柱5d1之间增加肋板5d3。
旋转支架包括中心柱5c1，中心柱5c1的下端部与立柱5d1的上端部套装且周向通过轴承5c5转动连接，中心柱5c1上还固定有齿轮5c4，还包括驱动齿轮转动的电机5d7，电机5d7固定于水平托板5d4，电机5d7通过齿轮5c4驱动中心柱5c1相对立柱5d1转动；中心柱5c1的上端部固 定有第二托板5c2，悬臂支架固定于第二托板5c2上。
为了第二托板5c2与中心柱固定的可靠性，还可以在中心柱与第二托板5c2之间增加肋板5c3，同时为了增加中心柱5c1转动灵活性，中心柱5c1上端部也可以增设定位轴承5c6。
悬臂支架包括水平延伸的两横梁5b1以及连接于两所述横梁5b1端部的端板5b2、第三托板5b3，所述驱动部件设于所述第三托板5b3上方，且所述第三托板5b3与固定支架5d转动连接，所述导轨5b4设置于两所述横梁5b1上表面。
所述横梁5b1的后端部还设置有两平行立板5b10，两平行立板5b10之间还连接有圆管5b12，圆管5b12与两平行立板5b10通过轴承5b11转动连接，管线搭于圆管5b12表面，当滑块前后滑动时，管线可随圆管5b12滚动，减小两者之间的摩擦力。
为了准确获取加载缸施加于试样上的加载力，在试验基座9上可以进一步设置应力应变采集装置8，用于采集所述试样不同方向上的应力应变参数；所述控制装置6根据所述应力应变参数控制所述流体压力加载装置4中流体介质的压力。其中应力应变采集装置8包括传感器和信号获取设备，传感器设置于本体上，信号获取设备一般设置于样品台的正下方的试验基座9上，信号获取设备与传感器之间通过信号线等连接，为了避免样品台转动时信号线缠绕，本文还进行了以下设置，具体描述如下。
上述各实施例中的工业CT扫描设备还可以包括设置于试样台下方的自动绕线器7，自动绕线器7包括上端部与试样台固定连接的螺纹杆7a、螺母7b组件、绕线筒7d，螺纹杆7a的下端部穿过多轴运动转台22的穿线孔向下延伸，螺母7b组件包括螺母7b和将螺母7b与多轴运动转台22的固定架周向限位的定位部件，螺母7b设于螺纹杆7a的外螺纹部，绕线筒7d套设于螺纹杆7a且两者轴向活动连接，且绕线筒7d与螺母7b固定连接。
首先安装时，将试样台上加载装置中的信号线缠绕于绕线筒7d表面，使信号线经绕线筒7d表面缠绕后传递至其他连接部件。这样当试样台旋转时，螺纹杆7a也随试样台同步旋转，因螺母7b周向固定，故相对螺纹杆7a向上或向下运动，进而与螺母7b固定的绕线筒7d也随螺母7b向上或 向下运动，这样从旋转试样台的边缘通孔传出来的信号线也随转台一起旋转，从而也就会围绕绕线筒7d旋转，信号线相对绕线筒7d边旋转边上下移动，形成螺旋运动，自动把信号线绕在绕线筒7d表面，避免信号线在试样台旋转时打结影响加载装置的旋转。
在一种具体的实施方式中，定位部件可以为分居于螺纹杆7a两侧的导杆7f以及套设于两导杆7f上且与导杆7f滑动连接的滑板7c，螺母7b固定于滑板7c。该结构比较简单，便于螺母7b的设置。
进一步地，两导杆7f的末端还连接有联板7g，联板7g上设置有轴承7e，螺纹杆7a的自由端部通过轴承7e连接联板7g；该结构中螺纹杆7a的自由端部也相对限位，有利于螺纹杆7a转动的稳定性。
当然，屏蔽室内还可以进一步设置控制面板10，控制面板10通过触摸屏界面可以设置加载装置的参数并显示试样的加载载荷，以便完成对试样的加载。具体控制面板的结构可以参考现有设备，在此不做详述。
需要说明的是，本文中所述的上、下等方位词均是以图1-图8中各部件之间的位置关系为参照而定义，仅是为了描述技术方案的简洁，不应限制本文的保护范围。
以上对本发明所提供的一种工业CT扫描试验系统及流体压力加载装置进行了详细介绍。本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。

Claims (8)

  1. 一种流体压力加载装置，应用于工业CT扫描试验系统，其特征在于，包括本体，所述本体内部开设有试样容置腔、至少一个流体介质腔，各所述流体介质腔的内部均置有活塞，所述活塞将相应所述流体介质腔隔离为两个腔室，其中一腔室通过所述本体内部设置的油路连通外部液压介质，另一腔室连通所述试样容置腔，并且各所述活塞朝向所述试样容置腔的一端可伸至所述试样容置腔内部；
    所述流体介质腔具体为第一流体介质腔和第二流体介质腔，相应所述活塞具体为第一活塞和第二活塞，所述第一活塞置于所述第一流体介质腔的内部，所述第二活塞置于所述第二流体介质腔的内部，并且所述第一活塞轴向和所述第二活塞轴向垂直布置；
    与所述流体介质腔相对的所述本体上还设置有工艺孔，所述工艺孔的径向尺寸小于所述流体介质腔的径向尺寸；且还包括与相应所述工艺孔匹配的堵塞。
  2. 如权利要求1所述的流体压力加载装置，其特征在于，所述流体介质腔还包括第三流体介质腔，所述第三流体介质腔的内部还置有第三活塞，所述第三活塞的轴向、所述第二活塞的轴向、所述第一活塞的轴向构成三轴坐标系。
  3. 如权利要求1所述的流体压力加载装置，其特征在于，沿轴向，所述活塞的第一端面的横截面尺寸大于第二端面的横截面尺寸，所述第一端面为朝向所述流体介质腔端部的端面，所述第二端面为朝向所述试样容置腔端部的端面。
  4. 如权利要求1所述的流体压力加载装置，其特征在于，纵截面内，所述本体设置所述流体介质腔侧的壁厚大于相对侧的壁厚。
  5. 如权利要求1至3任一项所述的流体压力加载装置，其特征在于，所述本体还设置有连通下表面与所述试样容置腔的通道，以便试样自所述通道置于所述试样容置腔的内部，并且所述通道的入口端还设置有堵塞。
  6. 如权利要求1至3任一项所述的流体压力加载装置，其特征在于，连通外部流体介质源的油口均设置于所述本体的上端面，各所述油口通过 内部油道连通相应所述流体介质腔。
  7. 如权利要求1至3任一项所述的流体压力加载装置，其特征在于，还包括两个连接头，所述本体的上下两端部均设置有法兰，两所述连接头通过螺栓连接所述本体两端部的法兰。
  8. 一种工业CT扫描试验系统，其特征在于，包括试验基座以及支撑于所述试验基座的多轴运动转台、射线发生装置、图像采集装置、流体压力加载装置，还包括控制装置；
    所述流体压力加载装置为权利要求1至7任一项所述的流体压力加载装置，当进行扫描实验时，各所述流体压力加载装置置于所述多轴运动转台的试样台上，并且根据试验需求对试样进行不同方向载荷的实时加载。
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