32results about How to "Reduce the number of rows" patented technology

The invention discloses an electric mist precipitator for smoke purification. The electric mist precipitator for smoke purification comprises a shell, anode plate rows and cathode pipe rows, wherein the anode plate rows and the cathode pipe rows are arranged in the shell; in the flowing direction of smoke, the anode plate rows and the cathode pipe rows are arranged in an inclining manner; therefore, when smoke enters the shell, the contact areas between the smoke and the anode plate rows and between the smoke and the cathode pipe rows are large, the needed number of the anode plate rows and the cathode pipe rows is small while it is ensured that the electric mist precipitator has the higher smoke purification rate, and therefore the electric mist precipitator is more compact in structure and smaller in occupied space, and the mounting flexibility is improved; the electric mist precipitator is mainly applied to the top smoke purification process of a wet method desulfurizing tower; through the reasonable model selection, a wet method desulfurizing original mechanical mist precipitating device can be replaced, and the smoke dust removal and mist precipitating process after the wet method desulfurizing can be independently finished.

The invention discloses a method for freezing a high-gradient heterogeneous freezing wall. The mixed freezing mode of "salt water + liquid nitrogen" is adopted, and a freezing pipe is arranged at the place where the soil around the shaft needs to be frozen, and a brine freezing pipe is arranged inside the freezing wall. , and a liquid nitrogen freezing tube is arranged on the periphery. The liquid nitrogen freezing tubes are arranged in one row, and the brine freezing tubes are arranged in at least one row, and each row is arranged in a circular shape. When there are two or more rows of brine freezing pipes, the diameter of the ring in the innermost row should ensure that the temperature of the well side during excavation is not higher than the ideal value that is conducive to the stability of the well side; the brine temperature setting of the brine freezing pipes should ensure that It can form a temperature field that gradually decreases from the inside to the outside. The temperature field formed by the freezing tube layout method of the present invention has obvious high gradient non-uniformity. Compared with conventional brine freezing, under the same load conditions, the thickness of the frozen wall formed by this pipe layout is small but has a higher bearing capacity, which will reduce the amount of frost heaving and thawing, and reduce the amount of engineering work for freezing holes , The freezing period is shortened.

The invention provides an undulator. The undulator at least comprises M permanent magnet cycles which are sequentially arranged along the direction to which an electron beam transmits; each permanent magnet cycle is composed of four rows of permanent magnet structures, each row comprising N rows of permanent magnet sets, wherein each row of permanent magnet sets comprises K permanent magnet units; M, N and K are all the natural numbers more than and equal to 1; the permanent magnet structures in the four rows are pairwise coupled and then are oppositely arranged at two sides in the along to which the electron beam transmits and relatively displace to form at least one combined magnetic field through which the electron beam emits elliptically polarized light, circularly polarized light or linearly polarized light in any polarizing angle of 0 to 360 degrees, and the electron velocity direction is deviated from the direction of an axis of the undulator. The undulator has the advantages that either linearly polarized light or elliptically and circularly polarized lights can be produced, and the electron velocity direction is deviated from the direction of the axis of the undulator all the times, so that the thermal load of the synchronously-radiated beam lines can be greatly reduced.

The invention discloses a water-cooled portable air conditioner, wherein, a part for forming an outdoor unit is positioned in a rear lower half of a V-shaped shell; a part for forming an indoor unit is positioned in a front half of the V-shaped shell; a compressor and a water-cooled outdoor heat exchanger are arranged on a protruding V-shaped tip in the back of a V-shaped chassis; two indoor through-flow fans are vertically arranged in the front of two V-shaped side walls of the V-shaped chassis respectively; and a V-shaped indoor heat exchanger is vertically arranged between each indoor through-flow fan and the side of the shell as well as an outdoor unit part. In the invention, the double through-flow fans are adopted for air supply so that the air inlet direction and the air outlet direction of an evaporator are consistent, thus reducing the number of rows of the heat exchangers, reducing the system resistance at a side of the evaporator, increasing air quantity, enhancing the heat exchange effect of the evaporator, and being beneficial to improving the overall capability of the air conditioner under the condition of ensuring a heat exchange area; and in addition, an air chamber 1 and an air chamber 2 are opened and closed according to selection of a user, thus reducing energy consumption and improving the satisfaction degree of the user.

The invention belongs to the technical field of high-temperature component cooling of an air turbine, in particular to an air film hole based on secondary flows of a bent passage, which comprises two parts: a bent passage section and a straight passage section, wherein the bent passage section is a circular arc and is formed by bending an air film hole inlet in the air flow incoming direction. Because of the bent passage of the air film hole, on one hand, cooling air flows generate secondary flowing by an air film, formed passage vortexes are bent through the transverse pushing of high-temperature air flows after leaving the air film hole, the rotation direction opposite to kidney-shaped vortexes is realized, the development of the kidney-shaped vortexes can be inhibited after the interaction, the strength of the kidney-shaped vortexes is weakened, the attaching capability of the air film to the wall surface is improved, and the air film cooling efficiency is improved. On the other hand, because of the existence of the passage vortexes, the cooling air flows have higher expansion speed at the outlet part of the air film hole, and the coverage width of the air film can be increased.

The invention provides an examining system, wherein the system comprises a CT (computed tomography) device which comprises a slip ring, a ray source connected to the slip ring, a detecting device opposite to the ray source and connected to the slip ring, and a transmitting device for transmitting examined objects; when the examined objects are progressed and approached to the plane at which the slip ring is positioned, the examined objects are slowed down for progressing at a low speed, and are accelerated for progressing at a high speed after the ray sources stops emitting rays, wherein the detecting device comprises N lines of detectors; a predetermined interval is reserved between two adjacent lines of detectors; N is an integer greater than one. By utilizing the examining system provided by the invention, the high-speed scan imaging of the CT device is realized, and the CT device and a scan imaging device for obtaining two-dimensional images are possibly used synchronously, so that the defects between the CT device and the scan imaging device are overcome.

The invention relates to a test bench for turbomachine comprising: an installation zone for turbomachine; an active system for attenuating the noise emissions produced by the turbomachine. The activesystem includes an attenuation zone with emitters such as loudspeakers; a first microphone placed downstream of the turbomachine; and a second microphone placed downstream of the attenuation zone. Thesystem reduces the turbomachine waves on the basis of the measurements from the first microphone and from the second microphone. The invention also proposes a method for attenuating the noise emissions from the turbomachine tested in the test bench.

The invention provides an inspection system which comprises a CT (Computed Tomography) device. The CT device comprises a slip ring, a ray source connected with the slip ring, a detection device and a conveyor, wherein the detection device corresponds to the ray source and is connected with the slip ring, and the conveyor conveys objects to be detected; the detection device comprises N rows of detectors, a preset gap is formed between adjacent two rows of detectors, and N is an integer larger than 1. The inspection system of the invention can be adopted to realize the high-speed scanning imaging of the CT device, enables the simultaneous use of the CT device and a scanning imaging device used for obtaining two-dimensional images to be possible so as to compensate for the mutual shortcomings.

The invention discloses a high-energy sparse CT (computed tomography) detector, a CT detection system and a detection method, belongs to the technical field of CT detection, and solves the problems that a CT detection device in the prior art is high in cost, not beneficial to popularization and application of equipment, low in cost, incapable of ensuring imaging precision and the like. The CT detector comprises high-energy detectors and low-energy detectors, the high-energy detectors and the low-energy detectors are arranged in a back-to-back mode, and one low-energy detector is arranged aboveeach high-energy detector; the number of rows of the low-energy detectors is larger than the number of rows of the high-energy detectors, and at least part of the high-energy detectors are distributed in a centralized mode. Part of high-energy detectors of the CT detector are arranged in a centralized mode, the cost is reduced, and meanwhile the imaging precision is high.

The invention discloses a sewage treatment device for adjusting the filtering efficiency based on water pressure, wherein the sewage treatment device comprises a treatment cylinder, the top of the treatment cylinder communicates with a suction pipe, the inner wall of the treatment cylinder is fixedly connected with a hollow fiber partition plate, and the hollow fiber partition plate divides an inner cavity of the treatment cylinder into two stages of cavities; and a pressure filter plate is fixedly mounted on the inner walls of the two stages of cavities, and needle holes are formed in the pressure filter plate. According to the sewage treatment device for adjusting the filtering efficiency based on the water pressure, due to the fact that two ends of a transmission shaft are made of metamaterials and have the characteristics of being pressed and twisted, the transmission shaft can be driven to rotate, the meshing effect of a gear and a rack plate is achieved, and the baffle is moved away; and under different water pressure, the distortion amplitude of the transmission shaft is different, when the water pressure in the suction pipe is influenced by external conditions and becomes small, the baffle cannot be completely moved away due to incomplete torsion of the transmission shaft, the number of rows of exposed needle holes is reduced, and the filtering rate is reduced.

The invention provides a heat collector and an air conditioner with the same. The heat collector comprises an undercooling coiler and an overheating coiler. The undercooling coiler is connected with the overheating coiler through a connection pipe. The overheating coiler is higher than the undercooling coiler. The heat collector is filled with coolants. When the heat collector is combined with a heat exchanger of the air conditioner, the liquid coolants in the undercooling coiler are converted into gaseous coolants by heat of high-temperature fresh air, the gaseous coolants flow into the overheating coiler at the higher position through the connection pipe, the gaseous coolants in the overheating coiler can be converted into liquid coolants by low-temperature fresh air from the heat exchanger, the liquid coolants flow into the undercooling coiler at the lower position through the connection pipe under the action of gravity, and the cycle repeats, so that heat or cold energy can be recovered automatically.

The invention discloses a retractable cutting and suturing machine, and belongs to the field of cutting and suturing machines in medical apparatuses. The retractable cutting and suturing machine structurally comprises an outer tube and a handle arranged at the rear end of the outer tube. The retractable cutting and suturing machine is characterized by also comprising a first supporting rod, a second supporting rod, a first seam cutting mechanism, a second seam cutting mechanism, an aperture angle regulating assembly, an opening and closing control assembly and a driving assembly, wherein the front end of the outer tube is hinged to the rear end of the first supporting rod and the rear end of the second supporting rod; the front end of the first supporting rod is hinged to the rear end of the first seam cutting mechanism, and the front end of the second supporting rod is hinged to the rear end of the second seam cutting mechanism; and the front end of the first seam cutting mechanism and the front end of the second seam cutting mechanism are in transmission connection with the aperture angle regulating assembly. Compared with the prior art, the retractable cutting and suturing machine disclosed by the invention has the characteristics that wounds are small, and cutting and suturing can be completed in one time.

The invention discloses a row-depth-variable heat exchanger and provides a fin tube heat exchanger which is used for improving uneven face velocity of the heat exchanger and relieving frosting of an area in a long distance away from an air inlet of a fan. The row-depth-variable heat exchanger comprises a plurality of heat exchange units, wherein each heat exchange unit comprises a plurality of heat exchange tubes and a group of fins which sleeve the heat exchange tubes; each heat exchange tube is in a shape of a circle with an opening; openings of the heat exchange tubes of each heat exchange unit are connected through an elbow, and each heat exchange tube is provided with a refrigerant inlet and a refrigerant outlet; the multiple heat exchange units are assembled to form a concentric fan shape, are arranged from inside to outside and are concentrically arranged; the fan is arranged at the upper part of an overall top sealing plate; the center of the fan is concentric to the multiple heat exchange units; the height of fins of each heat exchange unit is gradually reduced or increased from inside to outside in the horizontal direction; the fins of each heat exchange unit are equal in distance away from the air inlet of the fan on the same contour plane; the number of rows of the heat exchange tubes is reduced while the number of the heat exchange units is reduced along with the increase of the distance away from the air inlet of the fan in the vertical direction.

The invention discloses a dehumidifier. The dehumidifier comprises a shell, and further comprises a U-type heat exchanger, a fan, a volute, a middle partition plate, a compressor and a water tank which are arranged inside the shell; the middle partition plate is arranged between the U-type heat exchanger and the compressor; the fan is arranged inside the volute; the water tank is arranged below the volute; the shell is provided with an air inlet and an outlet; the U-type heat exchanger corresponds to the air inlet; the fan is arranged on the U-type inner side of the U-type heat exchanger; theair outlet direction of the fan faces the air outlet; and air is guided by the fan to enter via the U-type heat exchanger and then is blown out via the air outlet. The U-type heat exchanger of the dehumidifier is provided with three air inlet faces, so that a three-face air inlet channel is formed in the whole dehumidifier, compared with a single-face air inlet mode, the air processing area is increased, the air dehumidification efficiency is improved, noise generated during working of the dehumidifier is reduced, static pressure loss is reduced, and efficient operation of the fan can be ensured.

The invention relates to a discharge mechanism used for a large-scale pretreatment device for municipal solid wastes, and a waste pretreatment device. The discharge mechanism comprises more than two swing components positioned at the inner lower part of a fermentation raw material cavity, wherein the waste materials in the fermentation raw material cavity are stacked above the swing components. Each swing component comprises a swing body, a swing driving component and a plurality of digging claws which are arranged on the swing body and are used for breaking the self stacking support of the waste materials, wherein the swing driving component drives the swing body to drive the digging claws to swing. The waste pretreatment device comprises an upright barrel body, and an air pumping component, an automatic temperature control component and the discharge mechanism which are matched with the upright barrel body, wherein the discharge mechanism is positioned at the discharge end of the upright barrel body. The discharge mechanism has the advantages of simple and compact structure, low cost, simplicity in operation, low operating cost, good reliability and the like.

The invention relates to a steel bar evading structure for beam column nodes, relating to the field of building design. According to the steel bar evading structure, the problem that reinforcing ribsstretching into the node are collided when precast beams are mounted in an assembling building is solved. The steel bar evading structure comprises a node site and precast beams, wherein a row of longitudinal ribs are arranged in each precast beam along the length direction of the precast beam. The steel bar evading structure is characterized in that the longitudinal ribs include first longitudinal ribs and second longitudinal ribs, wherein the first longitudinal ribs stretch out of the precast beams and are provided with horizontal bending parts in the front, first reinforcing ribs parallel with the first longitudinal ribs are connected to the front ends of the horizontal bending parts, second longitudinal ribs stretch out of the precast beams and are provided with upward vertical bendingparts in the front, second reinforcing ribs parallel with the second longitudinal ribs are connected to the front ends of the vertical bending parts, and the first reinforcing ribs and the second reinforcing ribs are alternately distributed. According to the steel bar evading structure, the bridging manner of steel ribs in existing beam column nodes is improved, so that the collision among the reinforcing ribs can be effectively avoided, and meanwhile, the stabilization of the production of prefabricated components is improved.

The invention belongs to the technical field of cooling high-temperature components of a gas turbine, and in particular relates to a gas film hole based on a curved channel secondary flow. The air film hole includes two parts: a curved channel section and a straight channel section; wherein, the curved channel section is a circular arc formed by bending the inlet of the air film hole toward the incoming flow of the cooling airflow. The air film produces a secondary flow of the cooling airflow due to the curved channel of the air film hole. After the formed channel vortex leaves the air film hole, it bends under the lateral push of the high-temperature air flow, and has the opposite helicity to the kidney-shaped vortex. After the interaction, it can inhibit the development of the kidney-shaped vortex, weaken its strength, improve the adhesion ability of the air film to the wall, and increase the cooling efficiency of the air film. On the other hand, because of the existence of the channel vortex, the cooling air flow has a higher spanwise velocity at the outlet of the air film hole, which can increase the coverage width of the air film.

The invention discloses a large-dosage coal ash composite self-insulation building block and a preparation method thereof. The building block comprises a rectangular building block body on which multiple through holes are formed through extrusion, wherein semi-open through holes are symmetrically formed on two sides of the rectangular building block body; a thermal insulation material mixed by rice hull, silicate cement and 901 glue according to mass percentage is filled in the semi-open through holes and the multiple through holes; and the thermal insulation material is compacted, flattened, naturally cured to prepare the building block. The coal ash, coal ash ceramsite, rice hull, other industrial and agricultural wastes and light materials serve as main components, and a self-insulation function can be realized. The building block has the volume density of 676-704kg / m<3>, so that the capacity of the building block is greatly reduced, and the building deadweight and construction cost are reduced. The comprehensive dosage of the coal ash is more than 70 percent, the resources are fully utilized, and waste materials are changed into valuable materials. The building block are few in holes and rows and easy to form, and the damage rate in the processing, transport and construction process is low.

The present invention discloses a shell-and-tube heat exchanger with shell-side multi-channel parallel-flow inlet and outlet structure. It includes lower head, shell body, shell-side outlet, tube-side inlet, upper head, upper tube plate, heat-transferring tube bank, shell-side inlet, lower tube plate and tube-side outlet, and also includes shell-side inlet slot, inlet baffle plate, shell-side outlet slot, outlet baffle plate and longitudinal baffle plate.

The invention relates to a test stand (2) for a turbine (4), comprising: an installation area (16) for the turbine (4); an active system (38) for attenuating the noise emissions generated by the turbine (4) (40). The active system (38) includes an attenuation area (42) with a device (44) such as a loudspeaker; a first microphone (48) placed downstream of the turbine (4); and a second microphone (50) placed at the attenuation Downstream of area (42). A system (38) reduces turbine waves (40) based on measurements from the first microphone (48) and from the second microphone (50). The invention also proposes a method for attenuating the noise emissions from a turbine (4) tested in a test bench (2).

The present invention provides an undulator, wherein the undulator includes at least: M permanent magnet periods arranged in sequence along the electron beam transmission direction, each of the permanent magnet periods includes four rows of permanent magnet structures, and each row of permanent magnets The magnet structure includes N rows of permanent magnet groups, and each row of permanent magnet groups includes K permanent magnet units, wherein M, N, and K are all natural numbers greater than or equal to 1; the permanent magnet structures of the four rows are paired and opposite It is arranged on both sides of the electron beam transmission direction, and can form at least one composite magnetic field through relative displacement, so that when the electron beam passes through the composite magnetic field, it can generate elliptically polarized light, circularly polarized light, or any polarization angle from 0° to 360° direction of linearly polarized light, and make the direction of electron velocity deviate from the axis direction of the undulator. The invention can generate not only linearly polarized light, but also elliptical and circularly polarized light, and can make the direction of electron velocity never along the axial direction of the undulator, thereby greatly reducing the thermal load of the synchrotron radiation beamline.

The invention discloses a retracting arc cutting and stitching instrument, and belongs to the field of the cutting and stitching instrument in medical apparatuses. The arc cutting and stitching instrument structurally comprises a connection rod, a nail bin assembly, a nail bit assembly, a slide block, a driving wire, a nail bin occlusion arm, a nail bit occlusion arm, a drive rod and an occlusioncontrol rod, the nail bin assembly comprises an arc nail bin clamping plate, and a first slide rail is arranged on the arc nail bin clamping plate; the nail bit assembly comprises an arc nail bit clamping plate, the arc nail bit clamping plate and the arc nail bin clamping plate are oppositely arranged, and a second slide rail is arranged on the arc nail bit clamping plate; the two opposite ends of the slide block are matched with the nail bin clamping plate and the nail bit clamping plate in a sliding mode through the first slide rail and the second slide rail respectively, and a slide blockcutter inlet groove and a slide block cutter outlet groove are formed in the two ends of the second slide rail of the nail bit clamping plate respectively; the nail bin assembly and the nail bit assembly are in drive connection with the occlusion control rod through the nail bin occlusion arm, the nail bit occlusion arm and the drive rod. Compared with the prior art, the retracting arc cutting andstitching instrument has the advantages of being convenient to use and good in cutting and stitching effect.

The invention relates to a counter-force support structure for longitudinal dragging construction of a steel beam and a using method of the counter-force support structure, and relates to the technical field of bridge dragging construction. The counter-force support structure comprises a foundation platform; steel pipe brackets which are arranged on the top surface of the foundation platform in pairs; a slideway beam which is arranged on the top surface of the steel pipe bracket; a dragging system which is arranged on one side of the top surface of the slideway beam and is used for dragging the to-be-replaced steel beam on the top surface of the slideway beam; wherein the foundation platform is of a driven type steel pipe pile foundation structure; the steel pipe support comprises a vertical stand column structure and an inclined stand column structure. The steel pipe pile foundation and the bearing platform are combined into a whole, a traditional cast-in-situ bored pile foundation isreplaced, and the advantages of being simple in construction process and clear in force transmission path are achieved.

The invention discloses a high-energy sparse CT (computed tomography) detector, a CT detection system and a detection method, belongs to the technical field of CT detection, and solves the problems that a CT detection device in the prior art is high in cost, not beneficial to popularization and application of equipment, low in cost, incapable of ensuring imaging precision and the like. The CT detector comprises high-energy detectors and low-energy detectors, the high-energy detectors and the low-energy detectors are arranged in a back-to-back mode, and one low-energy detector is arranged aboveeach high-energy detector; the number of rows of the low-energy detectors is larger than the number of rows of the high-energy detectors, and at least part of the high-energy detectors are distributed in a centralized mode. Part of high-energy detectors of the CT detector are arranged in a centralized mode, the cost is reduced, and meanwhile the imaging precision is high.

A heat recovery device, comprising a supercooling coil pipe (1) and an overheating coil pipe (2), the supercooling coil pipe (1) and the overheating coil pipe (2) being connected by means of a connecting pipe (3), the position of the overheating coil pipe (2) being higher than the position of the supercooling coil pipe (1), and the heat recovery device being filled with refrigerant. When the heat recovery device is combined with a heat exchanger (4) of an air conditioning apparatus, the heat of high temperature fresh air converts liquid refrigerant in the supercooling coil pipe (1) into gaseous refrigerant, and the gaseous refrigerant flows via the connecting pipe (3) into the overheating coil pipe (2) that is positioned relatively higher; low temperature fresh air exiting the heat exchanger (4) can re-convert the gaseous refrigerant in the overheating coil pipe (2) into liquid refrigerant, and the liquid refrigerant flows under the action of gravity via the connecting pipe (3) into the supercooling coil pipe (1) that is positioned relatively lower; this manner of circulation can automatically implement recovery of heat or cold.

The invention provides a water wall penetrating structure for a low-temperature heating surface of a tower furnace and an installation method. According to an existing structure, the pitch of the low-temperature heating surface arranged above a flue is small and is mostly between 100 and 120mm, and a heating surface penetrating wall is of a welding structure, so that the structure brings great difficulty to boiler sealing and maintenance work after operation. The water wall penetrating structure comprises a set of low-temperature heating surface pipes (4), wherein the set of low-temperature heating surface pipes penetrate through a low-temperature heating surface hanging pipe (5) and are connected with a low-temperature heating surface scattered pipe (2) through an asymmetric tee joint (6); the low-temperature heating surface scattered pipe penetrates through water wall pipes (3) and is connected with a header (1); one end of the asymmetric tee joint is connected with two low-temperature heating surface pipes, and the other end of the asymmetric tee joint is connected with one low-temperature heating surface scattered pipe; one low-temperature heating surface scattered pipe penetrates between the two water wall pipes; the water wall pipes are arranged in parallel at equal intervals; and a water wall bent pipe is arranged every other water wall straight pipe. The invention is used for the water wall penetrating structure for the low-temperature heating surface of the tower furnace.

A rail vehicle air conditioning unit using L-shaped condensers comprises a box which comprises an evaporation cavity and a condensation cavity. The evaporation cavity and the condensation cavity are separately used for mounting an evaporation unit and a condensation unit which mainly comprises compressors, throttle devices, the condensers and condensation fans. The evaporation unit mainly comprises an evaporator. The rail vehicle air conditioning unit is characterized in that the condensers are L-shaped condensers; each L-shaped condenser comprises an L-shaped condensation fin set formed by a plurality of sets of L-shaped condensation fins; each L-shaped condensation fin set comprises a first condensation fin set body and a second condensation fin set body which are perpendicular to each other, wherein an arc transition fin set body is arranged between the first condensation fin set body and the second condensation fin set body; inlet section collection pipes and outlet section collection pipes are located at the vertical ends of one sides of the L-shaped condensation fin sets; the inlet section collection pipes are connected with the compressors, and the outlet section collection pipes are connected with the evaporator through the throttle devices; and the evaporator is connected with the compressors. The rail vehicle air conditioning unit adopts the L-shaped condensers, and the efficient, low-weight and small-size development requirements of the rail vehicle air conditioning unit are met.

The invention provides an examining system, wherein the system comprises a CT (computed tomography) device which comprises a slip ring, a ray source connected to the slip ring, a detecting device opposite to the ray source and connected to the slip ring, and a transmitting device for transmitting examined objects; when the examined objects are progressed and approached to the plane at which the slip ring is positioned, the examined objects are slowed down for progressing at a low speed, and are accelerated for progressing at a high speed after the ray sources stops emitting rays, wherein the detecting device comprises N lines of detectors; a predetermined interval is reserved between two adjacent lines of detectors; N is an integer greater than one. By utilizing the examining system provided by the invention, the high-speed scan imaging of the CT device is realized, and the CT device and a scan imaging device for obtaining two-dimensional images are possibly used synchronously, so that the defects between the CT device and the scan imaging device are overcome.