WO2018032733A1 - 用于检测装置的铅门帘防护装置及屏蔽射线的方法 - Google Patents

用于检测装置的铅门帘防护装置及屏蔽射线的方法 Download PDF

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Publication number
WO2018032733A1
WO2018032733A1 PCT/CN2017/073207 CN2017073207W WO2018032733A1 WO 2018032733 A1 WO2018032733 A1 WO 2018032733A1 CN 2017073207 W CN2017073207 W CN 2017073207W WO 2018032733 A1 WO2018032733 A1 WO 2018032733A1
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WO
WIPO (PCT)
Prior art keywords
lead curtain
lead
standby
area
curtain
Prior art date
Application number
PCT/CN2017/073207
Other languages
English (en)
French (fr)
Inventor
陈志强
张丽
洪明志
周勇
刘一宏
Original Assignee
同方威视技术股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 同方威视技术股份有限公司 filed Critical 同方威视技术股份有限公司
Priority to SG11201809579XA priority Critical patent/SG11201809579XA/en
Priority to RU2018139558A priority patent/RU2697857C1/ru
Priority to EP17840711.0A priority patent/EP3502675B1/en
Publication of WO2018032733A1 publication Critical patent/WO2018032733A1/zh
Priority to US16/168,850 priority patent/US10739282B2/en

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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
    • G01N23/06—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 measuring the absorption
    • G01N23/10—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 measuring the absorption the material being confined in a container, e.g. in a luggage X-ray scanners
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F3/00—Shielding characterised by its physical form, e.g. granules, or shape of the material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
    • G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F1/00—Shielding characterised by the composition of the materials
    • G21F1/02—Selection of uniform shielding materials
    • G21F1/08—Metals; Alloys; Cermets, i.e. sintered mixtures of ceramics and metals

Definitions

  • the present invention relates to the field of safety detection devices, and in particular, to a lead curtain protection device for detecting a device and a method for shielding radiation.
  • the security inspection equipment is widely used in stations, subways, airports, customs, ports, nuclear power plants, government agencies, and postal inspection centers. Courts, meeting places, etc.
  • a lead curtain is usually installed as a shielding curtain at both ends of the security inspection machine casing, and the X-ray is shielded from the security inspection channel to prevent leakage due to X-rays. The crowd brings harm.
  • lead curtains are mainly divided into fixed lead curtains and sports lead curtains, while the movable lead curtains are represented by drum type cyclic reciprocating forms.
  • the lead curtains currently in practical use are basically fixedly suspended from the entrance and exit of the security equipment passage.
  • the general process of security inspection is as follows: the item to be inspected enters the detection area by the top of the lead curtain at the entrance of the conveyor belt, and after the detection is completed, the lead curtain at the exit of the top of the conveyor belt is removed from the detection area by the drag of the conveyor belt.
  • the transmission form of the drum conveyor has its own significant drawbacks.
  • it is not easy to effectively fix the lead curtain on the conveyor belt.
  • the fixed conveyor belt is not provided with an external connection interface, and needs to be modified by itself. The cost is high and it is not suitable for mass production.
  • the weight of the lead curtain will inevitably cause serious drooping of the conveyor belt, thereby causing the article to convey and the X-ray shielding effect is large. discount.
  • the present invention provides a lead curtain protection device for detecting a device and a method for shielding a radiation, which can be adapted to the condition of the detected article running on the tape conveyor.
  • the pitch between the lead curtains is adjusted sexually, the radiation in the detection channel is shielded, the radiation shielding effect of the detection channel is improved, and one or more purposes of the safety of the detection device are improved.
  • a lead curtain guard for a detecting device includes: at least two lead curtains for shielding radiation in a detecting passage; and a supporting mechanism including a working area and a standby area, the work The detection zone is accommodated in the zone, and the standby zone is configured to store the lead curtain that is not used in the working area; the first transmission mechanism is configured to drive the lead curtain to move in the detection channel; And a second transmission mechanism for transferring the lead curtain between the standby area and the work area, wherein the second transmission mechanism is for transferring the lead curtain from the standby area to the work a zone that falls into the beginning of the detection channel and is located on the rear side of the item to be inspected; the first transmission mechanism is used to drive The lead curtain falling into the detection channel moves synchronously with the object to be inspected in front of it, and moves the lead curtain from a starting end of the working area to a starting end of the standby area; The second transmission mechanism is further configured to: when the lead curtain moves to the beginning end of the standby
  • the lead curtain guard further includes a guiding mechanism disposed on the supporting mechanism for guiding a movement trajectory of the lead curtain in the working area and the standby area.
  • the first transmission mechanism includes a first conveyor belt, and the first conveyor belt is provided with a first stopper along a circumferential direction thereof, the first conveyor belt for driving through the first stopper The lead curtain moves.
  • the first transmission mechanism further includes a first driving unit for continuously driving the first conveyor to rotate at a constant speed.
  • the second transmission mechanism includes a second conveyor belt, and the second conveyor belt is provided with a second stopper along a circumferential direction thereof, the number of the second stoppers being storable in the standby zone
  • the number of lead curtains is corresponding, and the second conveyor belt is configured to drive the lead curtain to enter or leave the standby area through the second block or move the lead curtain in the standby area.
  • the second transmission mechanism further includes a second driving unit for intermittently driving the rotation of the second conveyor, the second driving unit rotating once every time the second conveyor belt is driven, each The second stop moves forward by any distance between any two of the stops.
  • the second driving unit is configured to drive the second conveyor belt to rotate once when at least one of the following conditions occurs: the item to be detected completely enters the detection channel; any one The lead curtain moves to the end of the detection channel and is about to enter the standby area from the working area; there is only one lead curtain in the detection channel, and the lead curtain has been run to the detection channel End.
  • the lead curtain guard further includes a detecting mechanism, the detecting mechanism including a relative position for detecting the object to be detected and the detecting channel a first detecting mechanism and a second detecting mechanism for detecting an operating state and a distribution of the lead curtain.
  • a method of shielding a ray comprising: transferring a lead curtain from a standby area to a work area such that it falls into a starting end of the detection channel and is located at a rear side of the item to be inspected;
  • the lead curtain entering the detecting channel moves synchronously with the object to be detected in front of the detecting door, so that the lead curtain is moved from the starting end of the detecting channel to the starting end of the standby area; and the movement is to The lead curtain at the beginning of the standby zone is diverted into the standby zone and moved within the standby zone.
  • the method of shielding a ray further includes detecting a relative position of the item to be inspected and the detection channel to control transfer of the lead curtain between the standby area and a work area time.
  • the lead curtain in the standby zone is transferred to the work area when at least one of the following conditions occurs: the item to be inspected completely enters the detection channel; There is only one lead curtain in the detection channel, and the lead curtain has been run to the end of the detection channel.
  • the lead curtain in the standby zone stops shifting to the work area when at least one of the following conditions occurs: the number of lead curtains in the detection channel is greater than two The time from the previous lead curtain being transferred from the standby area to the working area is less than a preset time interval.
  • each time a lead curtain is transferred from the standby zone to the work area the lead curtain located behind the lead curtain in the standby zone is moved forward by a distance.
  • the lead curtain located in the standby area near the work area cannot be transferred to the work area after being moved once
  • the lead curtain can be moved forward a plurality of times to enable it to be transferred to work. Area.
  • FIG. 1 shows a lead curtain protective device for a detecting device according to an embodiment of the present invention. Schematic diagram of the overall structure
  • FIG. 2 shows a right side view of a lead curtain guard provided in accordance with an embodiment of the present invention
  • FIG. 3 is a cross-sectional structural view of a lead curtain guard according to an embodiment of the present invention in a longitudinal direction;
  • FIG. 4 shows an enlarged schematic view of a first transmission mechanism and a second transmission mechanism according to an embodiment of the present invention
  • FIG. 5 is an enlarged schematic view showing a first driving unit and a second driving unit according to an embodiment of the present invention
  • 6A and 6B are diagrams showing a state in which intermittent motion of the second transmission mechanism is triggered in the first case according to an embodiment of the present invention
  • FIG. 7A and 7B are diagrams showing a state in which intermittent motion of the second transmission mechanism is triggered in the second case according to an embodiment of the present invention
  • FIGS. 8A and 8B are diagrams showing a state in which intermittent motion of the second transmission mechanism is triggered in the third case according to an embodiment of the present invention.
  • FIG. 9 is a block diagram showing the overall structure of a safety detecting device according to an embodiment of the present invention.
  • a lead curtain guard 1 according to an embodiment of the present invention will be described in detail below with reference to FIGS. 1-9.
  • FIG. 1 is a schematic overall structural view of a lead curtain guard 1 for a detecting device (hereinafter referred to as a lead curtain guard) according to an embodiment of the present invention
  • FIG. 2 is a right view of the lead curtain guard 1 according to an embodiment of the present invention
  • FIG. 3 is a cross-sectional view of the lead curtain guard 1 in the longitudinal direction according to an embodiment of the present invention.
  • the lead curtain guard 1 is mounted in a safety detection device, including a lead curtain 12, a first transmission mechanism, a second transmission mechanism, and a support mechanism 16.
  • the support mechanism 16 includes a working area and a standby area, and the detection area 10 is accommodated in the working area.
  • the number of lead curtains 12 is at least two for shielding the radiation within the detection channel 10 from leaking out, and the lead curtain 12 not used in the work area is stored in the standby zone.
  • the first transmission mechanism is configured to drive the lead curtain 12 to move from the starting end of the working area to the starting end of the standby area.
  • the second transmission mechanism will drive the lead curtain 12 into the standby area. And move in the standby area.
  • the second transmission mechanism transfers the lead curtain 12 from the standby area to the work area so that it falls into the starting end of the detection channel 10 and is located at the rear side of the item to be inspected for preventing each detected item (not fully inspected)
  • the detection object of the channel may be referred to as a ray leakage on the back side of the item to be inspected;
  • the first transmission mechanism drives the lead curtain 12 falling into the detection channel 10 to move synchronously following the object to be detected in front of the object, so that the lead curtain 12 is detected by the detection channel 10
  • the starting end moves to the end of the detection channel 10 and further transports the lead curtain 12 to the beginning of the standby zone; here, the position of the entry 2 to be detected into the detection channel 10 is determined according to the direction of transport of the item 2 to be inspected As the start end 101, the position at which the article leaves the detection channel 10 is set as the end end 102.
  • the device can adaptively adjust the distance between the plurality of lead curtains 12 according to the distribution of the detected articles to be detected running on the transport belt conveyor 11, so that the lead curtain 12 can be located in the gap between the detected articles, thereby being effective
  • the radiation in the detection channel 10 is prevented from leaking out to ensure the personal safety of the surrounding personnel.
  • the support mechanism 16 is used to secure the various partial structures and provide support for the unitary structure, which may illustratively be the illustrated frame structure, and may be metal or non-metallic, corresponding to
  • the respective components in the lead curtain guard 1 are provided with corresponding mounting portions so that the components can be properly mounted.
  • the standby area 155 and the area defined by the work area 156 are specifically shown.
  • the transport belt conveyor 11 is fixed at the lower middle longitudinal height position of the support mechanism 16, and the five sides of the support mechanism 16 are And the transport surface of the transport belt conveyor 11 is co-enclosed to form a plurality of areas, wherein the work area 156 is located in the lower area, specifically by the two sides of the support mechanism 16 and the transport plane of the transport belt conveyor 11 between the two side structures
  • the standby area 155 is located in the upper area, specifically surrounded by the two sides of the support mechanism 16 and the upper top surface, and is formed by a plane of the first transmission mechanism parallel to the two conveying sections of the transport belt conveyor 11. Acts as an interface to separate the work area 156 from the standby area 155.
  • the detecting channel 10 is located in the working area 156, specifically surrounded by the transport surface of the transport belt conveyor 11, the two sides of the support mechanism 16, and the lead curtain 12 at the starting end 101, and is in the same direction as the transport surface of the transport belt conveyor 11. extend.
  • the article to be detected is moved by the transport tape dispenser 11 in the detecting channel 10, and the article to be detected can be sent from the starting end 101 of the detecting channel 10 to the ending end 102.
  • it can be adaptively adjusted according to the actual situation of the object to be detected.
  • the fixing position of the above-mentioned transport tape dispenser 11 in the support mechanism 16 is not limited thereto, and the fixed position thereof can complete the conveying work of the article to be detected in the detecting channel 10, and in other embodiments, it can also be based on the safety detecting.
  • the actual installation of the device requires that the transport belt conveyor 11 be fixed at any longitudinal height position of the support mechanism 16, at which point the position of the detection passage 10 is correspondingly changed according to the transport plane position of the transport belt conveyor 11.
  • the two guide mechanisms 15 and 15' are symmetrically mounted on both sides of the support mechanism 16 for guiding the movement trajectories of the plurality of lead curtains 12.
  • the guide mechanisms 15 and 15' limit and constrain the movement trajectory of the lead curtain 12 in the work area and the standby area.
  • the guide mechanisms 15 and 15' are annular tracks which may be made of a rigid material to increase the supporting force for the plurality of lead curtains 12.
  • the guiding mechanisms 15 and 15' are respectively composed of a sleeved two-layer annular frame and an annular passage formed between the annular frames, and the connecting portions of the plurality of lead curtains 12 are disposed in the annular passage of the guiding mechanisms 15 and 15'.
  • the connecting portion of the lead curtain 12 is a supporting shaft, and the two ends of the supporting shaft are slidably directly engaged with the annular passages of the guiding mechanisms 15 and 15' or by rolling the bearing by means of a rolling bearing.
  • the annular passages of the guiding mechanisms 15 and 15' are rolled and matched to make the lead curtain
  • the joint can be pushed by the first transmission mechanism or the second transmission mechanism to perform a cyclic motion in the annular passage.
  • the lateral lengths of the guiding mechanisms 15 and 15' are sufficient for the plurality of lead curtains 12 to move along the starting end 101 of the detecting channel 10 to the end end 102.
  • Each lead curtain 12 is provided with two round trips in the lead curtain guard 1: an upper stroke and a lower stroke.
  • the connecting portion is located in the upper end annular passage of the guiding mechanisms 15 and 15', and can be pushed and moved by the second transmission mechanism, and the bottom edge of the lead curtain 12 is away from the transportation.
  • the conveying surface of the belt conveyor 11 is in a reserve standby state; when the lead curtain 12 is in the lower stroke (ie, in the working area), specifically, the connecting portion is located in the lower end annular passage of the guiding mechanisms 15 and 15', and the first transmission mechanism can be The movement is pushed, and the bottom edge of the lead curtain 12 is adjacent to the transport plane of the transport belt conveyor 11, and is blocked from the rear side of the inspection article 2 to prevent the radiation in the detection passage from leaking outward.
  • the lead curtain 12 is in an operational state.
  • the connection on the lead curtain 12 for connection with the guiding mechanisms 15 and 15' corresponds to the guiding mechanisms 15 and 15'.
  • the first position 151 (only exemplarily shows that the lead curtain side is at the position of the guiding mechanism, the other side is symmetrically arranged, and hereinafter referred to as the lead curtain in the first position 151, the other positions are referred to as the first position 151)
  • the connection of the lead curtain corresponds to the second position 152 of the guiding mechanisms 15 and 15'; when the lead curtain 12 needs to be switched from the working area 156 to the standby area
  • its connection portion corresponds to the third position 153 of the guiding mechanisms 15 and 15'.
  • the lead curtain 12 When the lead curtain 12 needs to be switched from the standby area 155 to the working area 156, its connecting portion corresponds to the guiding mechanisms 15 and 15'. At the fourth position 154, the lead curtain 12 is prepared as the next lead curtain 12 that is moved to the starting end 101. Due to the arrangement of the guiding mechanisms 15 and 15', the plurality of lead curtains 12 can be effectively supported to prevent the annular track from sagging due to the excessive number of lead curtains, thereby affecting the protective effect.
  • FIG. 1 to FIG. 9 exemplarily show a case where the lead curtain guard 1 has 2 to 5 lead curtains 12, and in other embodiments, the number of the lead curtains 12 may be more, or may be The number of the detection frequency of the item to be inspected and the like is adaptively adjusted to the number of the lead curtains 12 in the lead curtain guard 1 so that the number of the lead curtains 12 can be adjusted.
  • the shielding ray needs of the detection channel 10 are sufficient.
  • the structure and the number of the guiding mechanisms are not limited thereto, and may also serve as a guiding mechanism by other structures in the safety detecting device, as long as the guiding and guiding of the movement trajectories of the plurality of lead curtains 12 can be provided, so that the lead curtain 12 has the above-mentioned Two round trips are available.
  • the number of guiding mechanisms may be three, that is, the guiding mechanisms on both sides are still the same as the mounting manner in the above embodiment, and the third guiding mechanism is taken in the middle of the two guiding mechanisms on both sides.
  • the position of one of the guiding mechanisms is mounted on the supporting mechanism 16, so that the supporting mechanisms on both sides share the supporting force, so that the guiding mechanism can be more uniformly stressed, and the service life of the lead curtain guard is increased.
  • the guiding mechanism can also be arranged like a complete conveyor belt, so that the connecting portion of the lead curtain can be mounted in the guiding mechanism in a surface contact manner, so that the guiding mechanism can be more uniformly stressed.
  • the first conveyor belts 13 and 13' are included as the first transmission mechanism that drives the movement of the plurality of lead curtains 12 in the work area 156.
  • the first conveyor belts 13 and 13' are respectively provided with a plurality of first stoppers 132 along the outer circumferential direction thereof. The first stoppers 132 drive the lead curtains 12 to move synchronously.
  • the plurality of first stoppers 132 may be a plurality of protrusions uniformly or non-uniformly formed on the first conveyor belts 13 and 13', and the degree of adhesion of the first stoppers 132 is related to the number of the lead curtains 12, As the case may be, the arrangement of the first stoppers 132 does not affect the pushing action of the first conveyor belts 13 and 13' on the lead curtain 12 in the embodiment of the present invention.
  • the first conveyor belts 13 and 13' are symmetrically disposed on both sides of the support mechanism 16 by four transmission wheels 131, respectively, and the first conveyor belts 13 and 13' are configured to have a polygonal structure by the arrangement of the transmission wheels 131.
  • the triangular structure as illustrated that is, by one of the transmission wheels 131, the first conveyor belts 13 and 13' form a corner structure at the first position 151, and the other two of the transmission wheels 131
  • a conveyor belt forms a transition between the second position 152 and the third position 153 such that the lead curtain 12 can be transported along the transition edge from the end 102 of the detection channel 10 to the beginning of the standby zone 155, with the remaining one of the transmission wheels 131 is tensioned so that the first conveyor belts 13 and 13' are configured to enable the lead curtain 12 to complete the movement in the work area and push the lead curtain 12 from the second position 152 to the third position 153 to complete the entire Lower stroke.
  • the lead curtain guard 1 further includes The first drive unit 18' that continuously drives the first conveyor belts 13 and 13' to rotate at a constant speed.
  • the first driving unit 18' includes a motor 181' and a speed reducer 182 which are sequentially connected. 'and timing belts 183' and 184' (shown in FIG. 2), and the first conveyor belt 13' passes through a transmission shaft 17 (shown in FIG.
  • the first driving unit 18' drives the first conveyor belts 13 and 13' to drive the first stopper 132 to move synchronously with the article 2 to be inspected, and does not effectively prevent radiation leakage in the detection passage 10 while Will affect the advancement of the detected item 2.
  • the above-described driving unit is not limited thereto, and it is only necessary to drive the first conveyor belts 13 and 13' for uniform reciprocating motion, and in other embodiments, the driving unit may be replaced by an engine or other brakes.
  • the plurality of lead curtains 12 in the standby area may be sequentially dropped into the detection passage 10
  • the starting end 101 or the lead curtain 12 at the beginning of the standby zone 155 is pushed into the standby zone 155.
  • the second transmission mechanism includes second conveyor belts 14 and 14' that are symmetrically disposed on opposite sides of the support mechanism 16 by three transmission wheels 147, respectively, by which the second conveyor belts 14 and 14' are configured such that A racetrack-shaped conveyor belt. That is, a drive wheel 147 is provided at each end of the second conveyor belts 14 and 14', and the intermediate transmission wheel 147 is used for tensioning.
  • the second conveyor belts 14 and 14' respectively provide a plurality of second stoppers 141-146 in the outer circumferential direction thereof, the plurality of second stoppers 141-146 being a plurality of projections uniformly distributed on the second conveyor belts 14 and 14' It divides the second conveyor belts 14 and 14' into a plurality of storage sections for storing the lead curtain 12.
  • the number of second stops 141-146 is set to correspond to the number of lead curtains 12 that can be stored in the standby zone 155, ie, the second stops 141-146 The set number is determined by the number of lead curtains 12 that can be stored in the standby area 155.
  • the correspondence between the number of the second stops and the number of lead curtains 12 that can be stored in the standby area 155 can be 2N+2, where N
  • N The number of lead curtains 12 that can be stored in the standby zone 155.
  • the number of uniforms of the second block is six, because the six blocks can be used.
  • the two conveyor belts 14 and 14' are equally divided into six storage sections so that during the intermittent movement of the second conveyor belts 14 and 14', it is ensured that the annular passage of the top end has at least two storage sections for storing the lead curtain.
  • the corresponding number of the second stoppers 141-146 and the number of the lead curtains 12 that can be stored in the standby area 155 may be more than the number of the lead curtains 12 that can be stored in the standby area 155, as long as it can be guaranteed.
  • the lead curtains 12 in the standby area 155 may be stored in the spaces formed between the adjacent two second blocks 141-146, respectively.
  • the second transmission mechanism is exemplified as a conveyor belt, but according to actual needs, the second transmission mechanism can also realize lead by using a chain drive, a rope drive (for example, a wire rope), or other link mechanism.
  • a chain drive for example, a rope drive
  • link mechanism for example, a wire rope
  • the lead curtain guard 1 further includes The second driving unit 18 enables the second conveyor belts 14 and 14' to intermittently reciprocate around a plurality of transmission wheels 147 disposed on the support mechanism 16, and the second driving unit 18 drives the second conveyor belts 14 and 14' each time. Rotating once, each second stop 141-146 moves forward the distance between any two stops.
  • the second driving unit 18 includes a motor 181, a speed reducer 182 and timing belts 183 and 184 (shown in FIG.
  • the lead curtain 12 between the second stops 141 and 146 in the standby area 155 is pushed to the fourth position 154. Since the original second stop 141 is moved to the position of the original second stop 142 after being triggered, the lead curtain 12 is not constrained by any of the second stops 141-146 at the fourth position 154, so that it can fall to the first position 151 by free fall motion, quickly reaching the start end 101 of the detection channel 10, thereby being On the rear side of the article 2 to be inspected on the transport belt conveyor 11, the radiation in the detection passage 10 is prevented from leaking outward; or the first conveyor belt 13 and 13' pushes the start end of the standby zone 155 (ie, at the third position 153) The lead curtain 12 is further pushed between the second stops 145 and 146 in the standby zone 155 by the intermittent movement of the second conveyor belts 14 and 14' to be in a standby state.
  • the spacing between the adjacent two second stops 141-146 is related to the distance between the third position 153 and the fourth position 154, and the number of lead curtains that can be stored in the standby area 155. If the distance between the third position 153 and the fourth position 154 is constant, the more the number of lead curtains 155 can be stored, the smaller the spacing between the second block 141 and the second block 146, and the second The spacing between the stops 141-146 is such that when the second transfer mechanism is opened once, the lead curtain 12 between the second stop 141 and the second stop 146 of the standby zone 155 can be Release and move to the first position 151 by free fall.
  • the arrangement and structure of the first conveyor belt and the second conveyor belt are not limited thereto, as long as the plurality of lead curtains 12 can be engaged with each other to complete the entire stroke in the guiding mechanism. And it can also be disposed on the support mechanism 16 by more or less transmission wheels and other structures, respectively, and the main structure of the first conveyor belt and the second conveyor belt may not be a belt structure, using a chain or other rope structure. The same can be achieved to drive the lead curtain 12 to move.
  • first block and the second block are not limited thereto, as long as the trajectory movement of the lead curtain 12 along the guiding mechanisms 15 and 15' can be realized.
  • first block The block and the second block may also be other structures having a blocking function, and may of course also be a recessed structure formed by the first conveyor belt or the second conveyor belt itself that can cooperate with the connection portion for pushing the lead curtain 12 or the like.
  • the lead curtain guard 1 further includes a detecting mechanism that provides the above-described detecting function, and the detecting mechanism can be set to enter the detecting channel 10 to be detected.
  • the relative position of the article 2 to the detection channel 10, the relative position between the two detection items 2 in the detection channel 10, and the distribution of the individual lead curtains 12 in the lead curtain guard 1 are detected (monitored) for the entire device
  • the normal operation provides information assistance and feedback, so that the lead curtain guard 1 can adaptively adjust and control the intermittent movement of the second conveyor belts 14 and 14' through the detection mechanism real-time detection feedback data, thereby making the lead curtain protection of the present invention
  • the device 1 can adaptively adjust the spacing between the plurality of lead curtains according to the distribution of the detected articles on the transport belt conveyor, and can maintain a good shielding effect without affecting the detection efficiency.
  • the detection mechanism is divided into a first detection mechanism and a second detection mechanism.
  • the first detecting mechanism is configured to detect a relative positional relationship between the detecting object and the detecting channel.
  • the first detecting mechanism includes a plurality of photoelectric switches, which are evenly distributed on the entire detecting channel along the direction of detecting the movement of the article, specifically for real-time The relative positional relationship between the detected article and the detected article and between the detected article and the detection channel is sensed. The denser the distribution of the first detection mechanism, the more realistic the reaction between the detected items or the relative position between the detected items and the detection channels.
  • the second detecting mechanism is configured to detect the running state and distribution of the lead curtain.
  • the second detecting mechanism also includes a plurality of photoelectric switches uniformly distributed along the circular track of the guiding mechanism for real-time sensing of the operating state of the lead curtain And distribution. Similarly, the denser the distribution, the more realistic the reaction to the actual state of the lead curtain.
  • the detecting mechanism in the above embodiment is exemplified as a photoelectric switch.
  • the detecting mechanism can also be other sensors for real-time monitoring of the position and distribution of the detected article or the lead curtain, for example, video monitoring. Device.
  • the detection mechanism can also be manually replaced by setting the observation hole.
  • the triggering rule of the second driving unit 18 for intermittent movement of the second transmission mechanism is divided into three cases, as follows:
  • the first case when the item to be inspected completely enters the detection channel.
  • FIG. 6A and FIG. 6B a state diagram in which the intermittent movement of the second transmission mechanism is triggered in the first case according to the embodiment of the present invention is shown in FIG. 6A when the detection mechanism of the lead curtain guard 1 is detected.
  • Behind the detection item 2 at the beginning of the detection channel 10 When there is a certain gap (i.e., detecting that the detected article 2 is completely entering the detection channel 10), that is, the intermittent movement of the second conveyor belts 14 and 14' is triggered, that is, the second stopper 141 and the second gear in the standby area 155 in Fig. 6A.
  • the lead curtain 12 between the blocks 146 will be pushed to the fourth position 154 and dropped by the free fall motion at the fourth position 154 into the gap behind the detection item 2 at the starting end (shown in Figure 6B). Good shielding.
  • the intermittent movement of the second transmission mechanism is triggered according to the embodiment of the present invention.
  • the second position 152 that is, the lead curtain 12 is immediately taken away from the detecting channel 10 (shown in FIG. 7A)
  • the second driving unit 18 is triggered.
  • the intermittent movement of the second conveyor belts 14 and 14', that is, the lead curtain 12 between the second stop 141 and the second stop 146 in the standby zone 155 at this time in FIG. 7A will be pushed to the fourth position 154, And it falls into the detection channel 10 by the free fall motion (shown in FIG. 7B), thereby providing a good shielding effect.
  • the third case when any lead curtain moves to the end of the detection channel and is about to enter the standby area from the work area.
  • FIG. 8A and FIG. 8B together, a state diagram in which the intermittent motion of the second transmission mechanism is triggered in the third case according to the embodiment of the present invention is shown.
  • the second drive unit 18 triggers intermittent movement of the second conveyor belts 14 and 14' such that the lead curtain 12 is pushed from the beginning end of the standby zone to between the second stops 145 and 146 in the standby zone 155. It is in the storage standby state (shown in Figure 8B). If there is a lead curtain 12 in the standby state between the second block 141 and the second block 146 before the triggering, the lead curtain 12 will be pushed to the fourth position 154 and detected by the free fall release. In channel 10.
  • the embodiment of the present invention further provides a method for shielding rays using the above-mentioned lead curtain protection device 1.
  • the above-mentioned lead curtain protection device 1 will be described as an example according to FIGS. 1 to 9.
  • the method includes the steps of transferring the lead curtain 12 from the standby zone 155 to the work area 156 such that it falls into the starting end 101 of the detection channel 10 and is located on the rear side of the article 2 to be inspected; driving the lead that falls into the detection channel 10
  • the curtain 12 moves synchronously at a constant speed following the item 2 to be inspected in front thereof, so that the lead curtain 12 is moved from the starting end 101 of the detecting passage 10 to the starting end of the standby area 155; and, the lead curtain 12 which will move to the starting end of the standby area 155 Transfer from the work area to the standby area to put it on standby.
  • a method of shielding a ray using a lead curtain further includes detecting a relative position of the item to be inspected and the detection channel to control a time during which the lead curtain is transferred between the standby area and the work area.
  • the method for detecting the position of the detected article or detecting the relative position of the article and the detecting channel may be an operation state and distribution of various parts in operation by installing an infrared detecting device or a detecting device such as a position sensor or a video monitoring device in the lead curtain guard device. Wait for testing.
  • a detecting mechanism (not shown) may be provided in the illustrated embodiment, which may detect the relative position of the article 2 to be detected entering the detecting channel 10 and the detecting channel 10, and two detections in the detecting channel 10.
  • the relative position between the articles 2 and the distribution of the respective lead curtains 12 in the lead curtain guard 1 are detected (monitored) to provide information assistance and feedback for the normal operation of the entire device, so that the lead curtain guard 1 can pass the detection.
  • the detection data of the real-time feedback of the mechanism adaptively adjusts the intermittent movement of the second conveyor belts 14 and 14', so that the lead curtain guard 1 of the present invention can adaptively adjust the lead curtain 12 according to the distribution of the detected articles 2.
  • the distribution can maintain a good shielding effect without affecting the detection efficiency.
  • the method for shielding a ray by a lead curtain further comprises transferring the lead curtain of the standby area to the working area according to the operating condition of the lead curtain in the working area and the standby area and the distribution of the item to be detected in the detecting channel. . Specifically, when at least one of the following conditions occurs, the lead curtain in the standby zone is transferred to the work area: when the item to be detected completely enters the detection channel, or there is only one lead curtain in the detection channel, and the lead curtain Has been run to the end of the detection channel.
  • FIGS. 6A and 6B illustrate state diagrams in which intermittent motion of the second transmission mechanism is triggered in the first case, in which the lead curtain is exposed, in accordance with an embodiment of the present invention.
  • the detecting mechanism of the guard 1 detects that the item to be inspected is placed on the tape conveyor at the beginning end of the detecting channel 10, and the item to be inspected completely enters the detecting channel 10 (this case is also applicable to two test items that are continuously placed on the tape machine.
  • the intermittent movement of the second conveyor belts 14 and 14' is triggered, that is, the lead curtain 12 between the second stopper 141 and the second stopper 146 in FIG. 6A is pushed to the position shown in FIG. 6B.
  • the fourth position 154 and by the free fall motion, it falls to the rear side of the detecting article 2 (or the gap between the two articles to be inspected) at the starting end, which serves a good shielding effect.
  • FIGS. 7A and 7B illustrate a state diagram in which the intermittent motion of the second transmission mechanism is triggered in the second case in accordance with an embodiment of the present invention, wherein the only lead curtain in the detection passage 10 is detected. 12 has been run to the second position 152 (as shown in Figure 7A), i.e., the lead curtain 12 is about to be carried away from the detection channel 10 (i.e., away from the work area 155), in order to always have a lead curtain in the detection channel 10. 12 is effectively shielded, and the second driving unit 18 triggers intermittent movement of the second conveyor belts 14 and 14', that is, the lead curtain 12 located between the second stopper 141 and the second stopper 146 in Fig.
  • FIGS. 8A and 8B are diagrams showing a state in which intermittent movement of the second transmission mechanism is triggered in the third case, in which the lead curtain 12 is lowered by the second conveyor belt 14 and 14', according to an embodiment of the present invention.
  • the second drive unit 18 triggers intermittent movement of the second conveyor belts 14 and 14' such that the lead curtain 12 is pushed by the second conveyor belts 14 and 14' to the second stop 145 and the second stop 146.
  • Figure 8B If there is a lead curtain 12 in a standby state between the second stopper 141 and the second stopper 146 before the trigger, the lead curtain 12 will be pushed and released into the detection passage 10.
  • the position of the five lead curtains 12 is not too dense, so that the last lead curtain 12 in the working area is already running. Go to the second position 152, and the work area is at the most A lead curtain 12 in front has not yet moved to the third position 153, causing radiation leakage.
  • the method of shielding the radiation by the lead curtain also includes the operation of the lead curtain in the working area and the standby area and the item to be detected in the detection channel. The distribution of the lead curtains in the standby zone is stopped.
  • the lead curtain in the standby zone stops shifting to the work area: the number of lead curtains in the detection channel is greater than two; or the distance from the previous lead curtain is transferred from the standby zone to The time in the workspace is less than the preset time interval.
  • the intermittent motion triggering of the second conveyor belts 18 and 14' by the second drive unit 18 will fail, ie The lead curtain 12 in the standby area 155 stops moving to the work area 156; and when any one of the lead curtains 12 falls into the start end 101 of the detection channel 10 (as shown by 7B), the preset stop time (seconds) In the event that the intermittent motion triggering of the second conveyor belt 14 and 14' by the second drive unit 18 will fail, that is, the lead curtain in the standby zone stops moving to the work area.
  • a method of shielding a ray using a lead curtain further includes moving a lead curtain located behind the lead curtain in the standby area a predetermined distance when a lead curtain is transferred from the standby area to the work area.
  • the certain distance is determined by the distance between the two second stops and the rotational speed of the intermittent rotation of the second drive mechanism, that is, the moving distance of the lead curtain in the standby area is triggered by the second transmission mechanism once, on which The moving distance of the second block is determined.
  • the movement distance of the second stop on the second conveyor belt is triggered once, according to the stop arrangement density on the second conveyor belt.
  • the moving distance of the second stop block after the second conveyor belt can be triggered
  • the setting is equal to the spacing between the adjacent two second blocks, and of course, may be set according to other conditions, as long as the second transmission mechanism can be guaranteed to be triggered once, the second block 141 and the second in the standby area 155.
  • the lead curtain 12 at the stop 146 can reach the fourth position 154 and be moved to the first position 151 by free fall motion.
  • FIGS. 7A and 7B when the lead curtain 12 (shown in FIG. 7A) between the second stopper 141 and the second stopper 146 is sent to the first position 151 ( As shown in FIG. 7B, the lead curtain 12 (shown in FIG.
  • the method for shielding a ray of a lead curtain according to the present invention further comprises: when the lead curtain located in the standby area near the working area is unable to be transferred to the working area after being moved by one movement, the lead curtain can be advanced forward Move so that it can be transferred to the workspace.
  • the standby area is not movable at one time.
  • the lead curtain 12 is driven to the fourth position 154 and released to the first position 151 (assuming there is no lead curtain 12 between the second block 141 and the second block 146 in the figure), at this time, the second drive Unit 18 is required to trigger intermittent movement of second conveyor belts 14 and 14' a plurality of times, i.e., causing second conveyor belts 14 and 14' to move the lead curtain 12 between the other stops multiple times until the lead curtain 12 is Released to the first position 151.
  • a safety detecting device 100 equipped with the above-described lead curtain guard 1 is also exemplarily shown.
  • the safety detecting device 100 includes two lead curtain guards 1 disposed at both ends, and a radiation source device 3 installed in the middle, that is, a joint of two lead curtain guards 1 and a source device 3
  • the test item 2 provides a completed detection channel. Since the safety detecting device 100 of the embodiment of the present invention has the above-described lead curtain guard 1 , it is also possible to adaptively adjust the distribution of a plurality of lead curtains according to the distribution of the detected articles on the transport belt machine without affecting the detection efficiency.
  • the lead curtain protection device provided by the embodiment of the invention and the method for shielding the radiation by using the lead curtain can be adapted to adjust the spacing between the lead curtains according to the distribution of the detected articles on the transport belt machine by providing two sets of transmission mechanisms. It can maintain a good shielding effect without affecting the detection efficiency.

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Abstract

一种铅门帘防护装置（1），包括：至少两个铅门帘（12）；支撑机构（16），包括工作区和待命区；第一传动机构，用于带动所述铅门帘（12）在所述检测通道（10）内运动；第二传动机构，用于使所述铅门帘（12）在所述待命区和工作区之间转移，其中，所述第二传动机构将所述铅门帘（12）从所述待命区转移至所述工作区，使其落入检测通道（10）的起始端并位于待检测物品的后侧；所述第一传动机构用于带动所述铅门帘（12）跟随其前方的所述待检测物品同步移动，并且使所述铅门帘（12）由所述工作区的起始端运动至所述待命区的起始端；所述第二传动机构还用于：带动所述铅门帘（12）进入所述待命区，并在所述待命区内移动。

Description

用于检测装置的铅门帘防护装置及屏蔽射线的方法 技术领域
本发明涉及安全检测设备技术领域，尤其涉及一种用于检测装置的铅门帘防护装置及屏蔽射线的方法。
背景技术
安检机设备由于体积小、重量轻、耗电低、自诊断功能完善、便于操作和维修，故其被广泛地应用在车站、地铁、机场、海关、港口、核电站、政府机关、邮检中心、法院、会议场所等。
由于安检机工作时产生的X射线会对操作人员的健康产生影响，故在安检机机壳的两端通常安装铅门帘作为屏蔽帘，为安检通道屏蔽X射线，防止因X射线泄露，给周围人群带来危害。
目前，铅门帘主要分为固定式铅门帘与运动式铅门帘，而运动式铅门帘的代表形式是滚筒式循环往复形式。当前实际应用的铅门帘，基本上都是固定悬挂于安检设备通道的进出口处。安检的大概流程为：待检物品通过传送带的拖动顶开入口处铅门帘进入检测区域，检测完毕后再次通过传送带的拖动顶开出口处的铅门帘离开检测区域。
对于固定式铅门帘在实际应用中，由于铅门帘本身比较沉重，对于一些质量较轻的待检物品无法顶开铅门帘进入到检测区域，从而带来了不必要的麻烦。除此之外，当铅门帘被顶开时，不可避免的会造成X射线的泄露。
对于滚筒式循环往复运动形式的铅门帘装置，由于铅门帘之间的距离固定不可调，因此，一种方式是只能让检测物品的布置与铅门帘之间的固定间距相适应，这种方式带来问题是必须人为的将检测物品刻意摆放以适应铅门帘之间的固定间距，从而造成检测效率低，浪费 时间。另一种方式是将铅门帘沿传送带布置的足够密，不用刻意安排铅门帘的固定间距与检测物品布置相适应，这种方式将造成整个传动设备非常沉重，带来能源上的极大浪费，而且，在整个通道中不一定有铅门帘会正好落在检测物品间的空隙中，依然会造成射线泄漏。
另外，滚筒式传送带的传动形式本身也存在显著的缺陷，即实际应用中，将铅门帘有效固定在传送带上并不容易，目前定型的传送带没有设置与外部连接的接口，需要自行的进行改造，成本较高，不适合大批量生产。除此之外，在实际应用中，如果滚筒与滚筒之间距离过长，当铅门帘分布较密集时，铅门帘的重量势必会造成传送带的严重下垂，从而造成物品传送以及X射线屏蔽效果大打折扣。
因此，需要一种改进的用于检测装置的屏蔽射线的方法和铅门帘防护装置。
发明内容
为有效解决现有技术中存在的上述一或多个缺陷，本发明提供了一种用于检测装置的铅门帘防护装置及屏蔽射线的方法，能够实现根据运行在胶带机上的检测物品情况，适应性地调节铅门帘间的间距，对检测通道内的射线进行屏蔽，提高检测通道的射线屏蔽效果，提高检测设备的安全性中的一个或多个目的。
为了实现上述目的，本发明采取了如下技术方案：
根据本发明的一个方面提供了一种用于检测装置的铅门帘防护装置，包括：至少两个铅门帘，用于屏蔽检测通道内的射线；支撑机构，包括工作区和待命区，所述工作区内容纳有所述检测通道，所述待命区用于存储未在所述工作区内使用的所述铅门帘；第一传动机构，用于带动所述铅门帘在所述检测通道内运动；和第二传动机构，用于使所述铅门帘在所述待命区和工作区之间转移，其中，所述第二传动机构用于将所述铅门帘从所述待命区转移至所述工作区，使其落入检测通道的起始端并位于待检测物品的后侧；所述第一传动机构用于带动 落入所述检测通道内的所述铅门帘跟随其前方的所述待检测物品同步移动，并且使所述铅门帘由所述工作区的起始端运动至所述待命区的起始端；所述第二传动机构还用于：当所述铅门帘运动至所述待命区的起始端时，带动所述铅门帘进入所述待命区，并在所述待命区内移动。
根据本发明的一个方面，所述铅门帘防护装置还包括设置于所述支撑机构上的导向机构，所述导向机构用于引导所述铅门帘在所述工作区和待命区内的运动轨迹。
根据本发明的一个方面，所述第一传动机构包括第一传送带，所述第一传送带上沿其周向设置有第一挡块，所述第一传送带用于通过所述第一挡块带动所述铅门帘移动。
根据本发明的一个方面，所述第一传动机构还包括用于连续驱动所述第一传送带匀速转动的第一驱动单元。
根据本发明的一个方面，所述第二传动机构包括第二传送带，所述第二传送带上沿其周向设有第二挡块，所述第二挡块的数量与所述待命区内可存储的铅门帘数量相对应，所述第二传送带用于通过所述第二挡块带动所述铅门帘进入或者离开所述待命区、或使所述铅门帘在所述待命区内移动。
根据本发明的一个方面，所述第二传动机构还包括用于间歇式驱动所述第二传送带转动的第二驱动单元，所述第二驱动单元每驱动所述第二传送带转动一次，每个所述第二挡块即向前移动任意两个所述挡块之间的距离。
根据本发明的一个方面，所述第二驱动单元用于在出现下列情况中的至少一种时，驱动所述第二传送带转动一次：所述待检测物品完全进入所述检测通道内；任一个所述铅门帘运动至所述检测通道的结束端，并且即将从所述工作区进入所述待命区；所述检测通道内仅有一个铅门帘，并且该铅门帘已经运行至所述检测通道的结束端。
根据本发明的一个方面，所述铅门帘防护装置还包括检测机构，所述检测机构包括用于检测所述待检测物品与所述检测通道的相对位 置的第一检测机构和用于检测所述铅门帘的运行状态与分布情况的第二检测机构。
根据本发明的另一个方面，提供了一种屏蔽射线的方法，包括：将铅门帘从待命区转移至工作区，使其落入检测通道的起始端并位于待检测物品的后侧；带动落入所述检测通道内的所述铅门帘跟随其前方的所述待检测物品同步移动，使所述铅门帘由所述检测通道的起始端运动至所述待命区的起始端；和将运动至所述待命区的起始端的所述铅门帘转移进入所述待命区，并在所述待命区内移动。
根据本发明的另一个方面，所述屏蔽射线的方法还包括，检测所述待检测物品与所述检测通道的相对位置，以控制在所述待命区和工作区之间转移所述铅门帘的时间。
根据本发明的另一个方面，当出现下列情况中的至少一种时，使所述待命区内的所述铅门帘转移至所述工作区：所述待检测物品完全进入所述检测通道内；所述检测通道内仅有一个铅门帘，并且该铅门帘已经运行至所述检测通道的结束端。
根据本发明的另一个方面，当出现下列情况中的至少一种时，所述待命区内的所述铅门帘停止向所述工作区转移：所述检测通道内的铅门帘的数量大于两个；距离上一个铅门帘由所述待命区转移至所述工作区的时间小于预设的时间间隔。
根据本发明的另一个方面，每当一个铅门帘由待命区转移至工作区时，位于待命区内该铅门帘后方的铅门帘即向前移动一定距离。
根据本发明的另一个方面，当位于待命区内靠近工作区的铅门帘通过一次移动后，无法被转移到工作区时，该铅门帘可向前进行多次移动，使其能够被转移至工作区。
附图说明
下面将参考附图来描述本发明示例性实施例的特征、优点和技术效果。
图1示出根据本发明实施例提供的用于检测装置的铅门帘防护装 置的整体结构示意图；
图2示出根据本发明实施例提供的铅门帘防护装置的右视图；
图3示出根据本发明实施例提供的铅门帘防护装置的沿纵向方向的剖面结构示意图；
图4示出了根据本发明实施例的第一传动机构和第二传动机构的放大示意图；
图5示出了根据本发明实施例的第一驱动单元和第二驱动单元的放大示意图；
图6A和图6B示出了根据本发明的实施例在第一种情况下第二传动机构的间歇运动被触发的状态图；
图7A和图7B示出了根据本发明的实施例在第二种情况下第二传动机构的间歇运动被触发的状态图；
图8A和图8B示出了根据本发明的实施例在第三种情况下第二传动机构的间歇运动被触发的状态图；
图9示出了根据本发明实施例的安全检测装置的整体结构示意图。
具体实施方式
下面将详细描述本发明的各个方面的特征和示例性实施例。在下面的详细描述中，提出了许多具体细节，以便提供对本发明的全面理解。但是，对于本领域技术人员来说很明显的是，本发明可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本发明的示例来提供对本发明的更好的理解。本发明决不限于下面所提出的任何具体配置，在不脱离本发明的精神的前提下覆盖了元素和部件的任何修改、替换和改进。在附图和下面的描述中，没有示出公知的结构和技术，以便避免对本发明造成不必要的模糊。
为了更好地理解本发明，下面结合图1-9对根据本发明实施例提供的铅门帘防护装置1进行详细描述。
图1为根据本发明实施例提供的用于检测装置的铅门帘防护装置1(以下简称铅门帘防护装置)的整体结构示意图，图2为根据本发明实施例提供的铅门帘防护装置1的右视图，图3为根据本发明实施例提供的铅门帘防护装置1的沿纵向方向的剖面视图。如图所示，该铅门帘防护装置1安装于安全检测装置中，包括铅门帘12、第一传动机构、第二传动机构和支撑机构16。具体地，该支撑机构16包括工作区和待命区，工作区内容纳有检测通道10。铅门帘12的数量至少为两个，用于屏蔽检测通道10内的射线，防止其向外泄漏，并且未在工作区内使用的铅门帘12存储于待命区内。第一传动机构用于带动铅门帘12由工作区的起始端运动至待命区的起始端，当铅门帘12运动至待命区的起始端，第二传动机构将带动该铅门帘12进入待命区，并在待命区内移动。具体地，第二传动机构将铅门帘12从待命区转移至工作区，使其落入检测通道10的起始端并位于待检测物品的后侧，用于防止每个检测物品(未完全进入检测通道的检测物品可以称为待检测物品)后侧的射线泄露；第一传动机构带动落入检测通道10内的铅门帘12跟随其前方的待检测物品同步移动，使铅门帘12由检测通道10的起始端运动至检测通道10的结束端，并进一步将该铅门帘12运送至待命区的起始端；在此，根据待检测物品2的输送方向将待检测物品2的进入检测通道10的位置设为起始端101，物品离开检测通道10的位置设为结束端102。当铅门帘12运动至检测通道10的结束端102处后，进一步被运送至待命区的起始端，并被第二传动机构由工作区转移至待命区，使其进入待命状态。该装置可以根据运行在运输胶带机11上的待检测检测物品的分布情况进行适应性调整多个铅门帘12间的距离，使得铅门帘12能够位于检测物品之间的空隙中，从而可以有效的防止检测通道10内的射线向外泄漏，保证周边人员人身安全。
在本发明的实施例中，支撑机构16用于固定各部分结构并为整体结构提供支撑，该支撑机构16示例性地可为图示的框架结构，并且可选用金属或者非金属材料，其对应铅门帘防护装置1中的各个组成部件配置相应的安装部，使各部件可以被合理安装布置。在图3所示的 实施例中，具体示出了待命区155以及工作区156所限定的区域，如图所示，运输胶带机11被固定于支撑机构16的中下部纵向高度位置处，支撑机构16的五个面以及运输胶带机11的运输面共同围设形成多个区域，其中，工作区156位于下部区域，具体由支撑机构16的两侧面以及位于该两侧结构之间的运输胶带机11的运输平面围设而成；而待命区155位于上部区域，具体由支撑机构16的两侧面以及上顶面围设而成，并且由第一传动机构的平行于运输胶带机11的两个输送段构成的平面充当分界面，以将工作区156和待命区155之间分隔开。检测通道10位于工作区156内，具体由运输胶带机11的运输面、支撑机构16的两侧面以及位于起始端101的铅门帘12围设而成，并与运输胶带机11的运输面同方向延伸。
通过运输胶带机11带动待检测物品在检测通道10内移动，能够使待检测物品从检测通道10的起始端101送到结束端102，当然根据实际输送待检测物品的情形，可以适应性地调整起始端101和结束端102的位置。此外，上述运输胶带机11在支撑机构16中的固定位置不限于此，其固定位置只要能完成待检测物品在检测通道10中的输送工作即可，在其它实施例中，还可以根据安全检测装置的实际安装需要将运输胶带机11固定于该支撑机构16的任意纵向高度位置处，此时，检测通道10的位置根据运输胶带机11的运输平面位置相应地改变。
在本发明的实施例中，两个导向机构15和15’对称安装在支撑机构16的两侧，用于对多个铅门帘12的运动轨迹进行引导。具体地，导向机构15和15’限制并约束铅门帘12在工作区和待命区内的运动轨迹。导向机构15和15’为环形的轨道，其可采用刚性材料制成，以增加对多个铅门帘12的支撑力。导向机构15和15’分别由套设的两层环形框以及形成于环形框之间的环形通道组成，多个铅门帘12的连接部设置于该导向机构15和15’的环形通道中，可作循环式运动，铅门帘12的连接部为支撑轴，该支撑轴的两端采用可滑动形式直接与导向机构15和15’的环形通道接触配合或者采用可滚动的形式通过设置滚动轴承的方式与导向机构15和15’的环形通道滚动配合，使铅门帘的连 接部能够被第一传动机构或者第二传动机构推动，在环形通道中进行循环运动。
导向机构15和15’的横向长度足以使得多个铅门帘12可沿检测通道10的起始端101移动到结束端102。使得每个铅门帘12在铅门帘防护装置1中具有往返的两个行程：上部行程和下部行程。当铅门帘12处于上部行程时(即位于待命区)，具体指其连接部位于导向机构15和15’的上端环形通道中，可由第二传动机构推动移动，并且铅门帘12的底边缘远离运输胶带机11的输送面，处于储备待命状态；当铅门帘12处于下部行程时(即位于工作区)，具体指其连接部位于导向机构15和15’的下端环形通道中，可由第一传动机构推动移动，并且铅门帘12的底边缘临近于运输胶带机11的运输平面，挡于检测物品2后侧，避免检测通道内的射线向外泄露。
在工作区156中，铅门帘12处于工作状态，当铅门帘12在起始端101处时，铅门帘12上的用于与导向机构15和15’连接的连接部对应处于导向机构15和15’的第一位置151处(只示例性地说明铅门帘一侧处于导向机构的位置，另一侧为对称方式设置，并且以下简称铅门帘处于第一位置151，其他位置描述的简称同第一位置151)，当该铅门帘12运动至结束端102处时，该铅门帘的连接部对应处于导向机构15和15’的第二位置152处；当铅门帘12需要从工作区156切换至待命区155时，其连接部对应处于导向机构15和15’的第三位置153处，当该铅门帘12需要从待命区155切换至工作区156时，其连接部对应处于导向机构15和15’的第四位置154处，并且该铅门帘12准备作为下一个移动至起始端101的铅门帘12。由于该导向机构15和15’的设置，使得可以对多个铅门帘12进行有效地支撑，防止因为铅门帘的数量过多造成环形轨道下垂的现象，影响防护效果。
图1至图9中示例性地示出了铅门帘防护装置1具有2个至5个铅门帘12的情形，在其它实施例中，铅门帘12的数量还可以是更多个，还可以根据待检测物品的检测频率数量等实际情况对铅门帘防护装置1中的铅门帘12的数量做适应性地调整，使铅门帘12的数目能 够满足检测通道10的屏蔽射线需要。
当然导向机构的结构和数量不限于此，并且也可以由安全检测装置中的其他结构来充当导向机构，其只要能够对多个铅门帘12的运动轨迹提供约束与引导，使铅门帘12具有上述两个往返行程即可。例如，在其它的实施例中，导向机构的数量还可以为三个，即两侧的导向机构仍然同上述实施例中的安装方式，第三个导向机构采取于两侧的两个导向机构中间，或偏向其中一个导向机构的位置安装于支撑机构16上，以为两侧的导向机构分担其承受的支撑力，使导向机构可以更均匀地受力，增加铅门帘防护装置的使用寿命。当然导向机构还可以设置为类似一个完整的传送带形式，使得铅门帘的连接部可采用面接触的方式安装于导向机构中，进而使导向机构可以更均匀地受力。
根据本发明的实施例，作为在工作区156中带动多个铅门帘12运动的第一传动机构，包括第一传送带13和13’。请一并参见图4，根据本发明实施例的第一传动机构和第二传动机构的放大示意图，第一传送带13和13’分别沿其外周方向设置有多个第一挡块132，通过多个第一挡块132带动铅门帘12同步移动。该多个第一挡块132可为均匀或者非均匀地形成于第一传送带13和13’上的多个凸起，第一挡块132的密布程度与所述铅门帘12的数量有关，视情况而定，但是该第一挡块132的布置数量并不会影响本发明实施例中第一传送带13和13’对铅门帘12的推动作用。第一传送带13和13’分别通过四个传动轮131对称设置于支撑机构16的两侧，通过传动轮131的设置使得第一传送带13和13’被配置成具有多边形结构。示例性地，如图示的三角形结构，即通过其中的一个传动轮131使第一传送带13和13’在第一位置151处形成角部结构，而通过其中的另两个传动轮131使第一传送带在第二位置152和第三位置153之间形成一条过渡边，使得铅门帘12可沿过渡边由检测通道10的结束端102被运送至待命区155的起始端处，其余一个传动轮131起张紧作用，使第一传送带13和13’被构成为，能够带动铅门帘12完成在工作区内的移动，并将铅门帘12由第二位置152推送至第三位置153，完成整个下部行程。
为使得设置于支撑机构16两侧的第一传送带13和13’形成一组可以带动处于其上的铅门帘12在检测通道10中完成下部行程的第一传动机构，铅门帘防护装置1还包括连续驱动第一传送带13和13’匀速转动的第一驱动单元18’。请一并参见图5，示出的根据本发明实施例的第一驱动单元18’和第二驱动单元18的放大示意图，上述第一驱动单元18’包括依次连接的电机181’、减速机182’以及同步带183’和184’(图2所示)，并且第一传送带13’通过连接于相对设置的一对传动轮131之间的传动轴17(图1所示)以及同步带184’将驱动力传递于第一传送带13上。并且，第一传送带13和13’的移动速度和运输胶带机11的运转速度同步，使铅门帘12可以保持与检测物品同样的移动速度，处于检测物品的后侧，以保证当有检测物品处于检测通道10中时，第一驱动单元18’驱动所述第一传送带13和13’带动第一挡块132与待检测物品2同步运动，并且在有效防止检测通道10内的射线泄漏的同时不会影响检测物品2的前进。
当然上述驱动单元不限于此，其只要能够驱动第一传送带13和13’进行匀速的循环往复运动即可，在其它实施例中驱动单元还可以由发动机或者其他制动器替代。
根据本发明的实施例，作为用于使铅门帘12在待命区155和工作区156之间转移的第二传动机构，其可使处于待命区的多个铅门帘12依次落入在检测通道10的起始端101或者将处于待命区155的起始端的铅门帘12推入待命区155内。该第二传动机构包括第二传送带14和14’，其分别通过三个传动轮147对称设置于支撑机构16的两侧，通过该传动轮147的设置使得第二传送带14和14’被配置成呈跑道形的传送带。即在第二传送带14和14’的两端各设置一个传动轮147，中间的传动轮147用于起张紧作用。第二传送带14和14’分别沿其外周方向设置多个第二挡块141-146，该多个第二挡块141-146为均布于第二传送带14和14’上的多个凸起，其将第二传送带14和14’划分成多个存储段，对铅门帘12进行存储。第二挡块141-146的设置数量与待命区155中可以存储的铅门帘12的数量相应，即第二挡块141-146的 设置数量由待命区155中可以存放的铅门帘12的数量决定，例如，第二挡块的设置数量与待命区155中可以存放的铅门帘12的数量的对应关系可以为2N+2，其中N为待命区155中可以存放的铅门帘12的数量。例如图3和图4中所示，当待命区155中需要存放的铅门帘12的数量为2个时，此时第二挡块的均布数量则为6，因为六个挡块可以把第二传送带14和14’平均分为六个存储段，使得第二传送带14和14’在间歇运动过程中，可以保证顶端的环形通道至少具有两个存储段可以对铅门帘进行存储。当然，第二挡块141-146的设置数量与待命区155中可以存放的铅门帘12的数量的对应关系还可以多于待命区155中可以存放的铅门帘12的数量，只要是能够保证位于待命区内155的铅门帘12可以被分别存储于两两相邻的第二挡块141-146之间形成的间距中即可。
在上述实施例中，第二传动机构被例示为传送带，但是根据实际需要，第二传动机构还可以采用链传动、绳类传动(例如：钢丝绳)、或者其他的连杆机构等可以实现对铅门帘进行传送的结构。
为使得设置于支撑机构16两侧的第二传送带14和14’形成一组可以带动处于其上的铅门帘12在待命区155中完成上部行程的第二传动机构，铅门帘防护装置1还包括第二驱动单元18，使第二传送带14和14’可围绕设置于支撑机构16上的多个传动轮147间歇性地作循环往复运动，第二驱动单元18每驱动第二传送带14和14’转动一次，每个第二挡块141-146即向前移动任意两个挡块之间的距离。请一并参见图5，上述第二驱动单元18包括依次连接的电机181、减速机182以及同步带183和184(图2所示)，第二传送带14’通过连接于相对设置的一对传动轮147之间的传动轴17’(图2所示)以及同步带184将驱动力传递于第二传送带14上。并且，由于第二传送带14和14’的运动是间歇性的，即根据需要被第二驱动单元18触发开启，请一并参见图3和图1，当第二传送带14和14’被第二驱动单元18触发后，第二挡块141-146可以带动处于其处的铅门帘12沿顺时针方向移动一定距离，该一定距离由两个相邻的第二挡块141-146之间的距离决定，此时处于 待命区155内第二挡块141与146之间的铅门帘12被推送到第四位置154处，由于被触发后，原第二挡块141移动到原第二挡块142位置处，铅门帘12在第四位置154处没有受任何一个第二挡块141-146的约束作用，因此其通过自由落体运动可下落到第一位置151处，快速到达检测通道10起始端101处，从而可置于运输胶带机11上的待检测物品2后侧，阻止检测通道10内的射线向外泄漏；或者被第一传送带13和13’推送待命区155的起始端(即处于第三位置153)处的铅门帘12，通过第二传送带14和14’的间歇运动进一步被推送至待命区155中的第二挡块145与146之间，处于待命状态。并且相邻的两个第二挡块141-146之间的间距与第三位置153和第四位置154之间的距离、以及待命区155内能够存储铅门帘的数量有关。若第三位置153和第四位置154之间的距离恒定，待命区155能够存储铅门帘的数量越多，则第二挡块141与第二挡块146之间的间距越小，并且第二挡块141-146之间的间距要满足当第二传送机构开启一次，处于待命区155的第二挡块141与第二挡块146之间的的铅门帘12可在第四位置154处被释放，并通过自由落体运动至第一位置151处即可。
当然第一传送带和第二传送带的设置方式以及结构也并不限于此，其只要能够实现相互配合带动多个铅门帘12完成在导向机构中的整个行程即可。并且其还可以分别通过更多或者更少的传动轮以及其他的结构设置于支撑机构16上，而且第一传送带和第二传送带的主体结构还可以不是带状结构，使用链条或者其他绳状结构等同样可以实现带动铅门帘12移动。
当然上述第一挡块和第二挡块的结构也不限于此，其只要能够实现推动铅门帘12沿导向机构15和15’所限定的轨迹运动即可，在其它实施例中，第一挡块和第二挡块还可以为具有阻挡功能的其它结构，当然还可以为第一传送带或者第二传送带自身形成的可配合推动铅门帘12的连接部的凹陷结构等。
根据本发明的实施例，铅门帘防护装置1还包括提供上述检测功能的检测机构，通过设置检测机构可以对进入检测通道10中的待检测 物品2与检测通道10的相对位置、检测通道10中两个检测物品2之间的相对位置，以及铅门帘防护装置1中各个铅门帘12的分布情况进行检测(监测)，以便为整个装置的正常运行提供信息辅助与反馈，使铅门帘防护装置1可以通过检测机构实时的检测反馈数据，对第二传送带14和14’的间歇运动进行适应性地调整控制，从而使本发明的铅门帘防护装置1，可以根据检测物品在运输胶带机上的分布情况，自适应地调整多个铅门帘间的间距，在不影响检测效率的基础上能够保持良好的屏蔽效果。
根据本发明的实施例，检测机构分为第一检测机构和第二检测机构。第一检测机构用于检测检测物品与检测通道的相对位置关系，示例性地，第一检测机构包括若干光电开关，其沿着检测物品运动的方向均匀分布于整个检测通道上，具体用于实时感应检测物品与检测物品之间以及检测物品与检测通道之间的相对位置关系。第一检测机构分布的越密集，则越能真实地反应检测物品之间或者检测物品与检测通道之间相对位置的实际情况。
第二检测机构用于检测铅门帘的运行状态与分布情况，示例性地，第二检测机构同样包括若干光电开关，其沿着导向机构的环形轨道均匀分布，用于实时感应铅门帘的运行状态与分布情况。同样，其分布的越密集，越能真实地反应铅门帘的运行状态与分布的实际情况。
当然，上述实施例中的检测机构被例示为光电开关，但是，该检测机构同样还可以为其他用于对检测物品或者铅门帘的位置、分布情况进行实时监测的传感器等，例如可以是视频监控器。当然该检测机构还可以通过设置观察孔被人工替代。
上述第二驱动单元18对第二传动机构的间歇性运动的触发规则分为三种情况，具体如下：
第一种情况：当待检测物品完全进入检测通道内时。
请参见图6A和图6B示出的根据本发明的实施例在第一种情况下第二传动机构的间歇运动被触发的状态图，如图6A所示当铅门帘防护装置1的检测机构检测到检测通道10的起始端处的检测物品2后面有 一定间隙时(即检测到检测物品2完全进入检测通道10中)，即触发第二传送带14和14’的间歇性运动，即图6A中位于待命区155中第二挡块141和第二挡块146之间的铅门帘12将被推动至第四位置154处，并在第四位置154处通过自由落体运动下落至起始端的检测物品2之后的间隙中(图6B所示)，起到良好的屏蔽作用。
第二种情况：当检测通道内仅有一个铅门帘，并且该铅门帘已经运行至检测通道的结束端时。
请一并参见图7A和图7B示出的根据本发明的实施例在第二种情况下第二传动机构的间歇运动被触发的状态图，当检测通道10内唯一一个铅门帘12已经运行到第二位置152处时，即该铅门帘12马上就要被带离检测通道10(图7A所示)，为了使检测通道10内始终有铅门帘12进行有效屏蔽，第二驱动单元18即触发第二传送带14和14’的间歇性运动，即图7A中此时位于待命区155中第二挡块141和第二挡块146之间的铅门帘12将被推动至第四位置154处，并通过自由落体运动下落至检测通道10中(图7B所示)，从而起到良好的屏蔽作用。
第三种情况：当任一个铅门帘运动至检测通道的结束端，并且即将从工作区进入待命区时。
请一并参见图8A和图8B示出的根据本发明的实施例在第三种情况下第二传动机构的间歇运动被触发的状态图。当有铅门帘12被第二传送带14和14’沿过渡边自下而上传送移动至第三位置153时(图8A所示)，为了使该铅门帘12容易被推送至待命区155内，第二驱动单元18即会触发第二传送带14和14’的间歇性运动，使得该铅门帘12由待命区的起始端处被推动送至待命区155中第二挡块145与146之间，处于存储待命状态(图8B所示)。触发前若待命区155第二挡块141和第二挡块146之间有处于待命状态的铅门帘12时，则该铅门帘12将被推动至第四位置154处并通过自由落体释放进入检测通道10中。
本发明实施例还提供一种采用上述铅门帘防护装置1的屏蔽射线的方法，以下将根据图1至9以上述的铅门帘防护装置1为例阐述本 发明实施例的采用铅门帘屏蔽射线的方法。该方法包括以下步骤：将铅门帘12从待命区155转移至工作区156，使其落入检测通道10的起始端101并位于待检测物品2的后侧；带动落入检测通道10内的铅门帘12跟随其前方的待检测物品2匀速同步移动，使铅门帘12由检测通道10的起始端101运动至待命区155的起始端；和，将运动至待命区155的起始端的铅门帘12由工作区转移至待命区，使其处于待命状态。
根据本发明的实施例，采用铅门帘屏蔽射线的方法还包括检测待检测物品与检测通道的相对位置，以控制在待命区和工作区之间转移铅门帘的时间。检测检测物品位置或者检测物品与检测通道相对位置的方法可以采用在铅门帘防护装置中安装红外线监测设备或者位置传感器或者视频监测设备等检测机构的方式对运行中的各部分的运行状态以及分布情况等进行检测。具体地，可以在图示的实施例中设置检测机构(未示出)，该检测机构可以对进入检测通道10中的待检测物品2与检测通道10的相对位置、检测通道10中两个检测物品2之间的相对位置，以及铅门帘防护装置1中各个铅门帘12的分布情况进行检测(监测)，以便为整个装置的正常运行提供信息辅助与反馈，使铅门帘防护装置1可以通过检测机构实时反馈的检测数据，对第二传送带14和14’的间歇运动进行适应性调整控制，从而使本发明的铅门帘防护装置1可以根据检测物品2的分布情况，自适应地调整铅门帘12的分布，在不影响检测效率的基础上能够保持良好的屏蔽效果。
根据本发明的实施例，采用铅门帘屏蔽射线的方法还包括根据铅门帘在工作区和待命区中的运行状况以及检测通道中待检测物品的分布情况，将待命区的铅门帘转移至工作区。具体地，当出现下列情况中的至少一种时，使待命区内的铅门帘转移至工作区：待检测物品完全进入检测通道内时，或者检测通道内仅有一个铅门帘，并且该铅门帘已经运行至检测通道的结束端。
在一个示例中，图6A和图6B示出了根据本发明的实施例在第一种情况下第二传动机构的间歇运动被触发的状态图，其中，当铅门帘 防护装置1的检测机构检测到检测通道10的起始端处胶带机上放置有待检测物品，并且待检测物品完全进入检测通道10中(该情况同样适用于两个连续被放置在胶带机上的检测物品相互间具有一定间隙时)，即触发第二传送带14和14’的间歇性运动，即图6A中位于第二挡块141和第二挡块146之间的铅门帘12被推送至图6B中所示第四位置154处，并通过自由落体运动下落至起始端的检测物品2后侧(或者两个待检测物品之间的间隙中)，起到良好的屏蔽作用。
在另一个示例中，图7A和图7B示出了根据本发明的实施例在第二种情况下第二传动机构的间歇运动被触发的状态图，其中，当检测通道10内唯一一个铅门帘12已经运行到第二位置152处时(如图7A所示)，即该铅门帘12马上就要被带离检测通道10(即离开工作区155)，为了使检测通道10内始终有铅门帘12进行有效屏蔽，第二驱动单元18即触发第二传送带14和14’的间歇性运动，即图7A中此时位于第二挡块141和第二挡块146之间的铅门帘12将被推动至第四位置154处，并通过自由落体运动下落至第一位置151处(图7B所示)，即该铅门帘12处于检测通道10的起始端101位置，从而起到良好的屏蔽作用。
图8A和图8B示出了根据本发明的实施例在第三种情况下第二传动机构的间歇运动被触发的状态图，其中，当有铅门帘12被第二传送带14和14’自下而上传送运行至第三位置153时，即处于待命区155的起始端位置时(图8A所示)，为了使该铅门帘12容易被推送至第二挡块141和第二挡块146之间，第二驱动单元18即会触发第二传送带14和14’的间歇性运动，使得该铅门帘12被第二传送带14和14’推动送至第二挡块145和第二挡块146之间，处于存储状(图8B所示)。触发前若第二挡块141和第二挡块146之间有处于待命状态的铅门帘12时，则该铅门帘12将被推动并释放至检测通道10中。
根据本发明的实施例，为了保证每两个相邻的铅门帘12之间有一定的间隔，不至于5个铅门帘12彼此位置过于密集，导致工作区内处于最后方一个铅门帘12已经运行到第二位置152处，而工作区处于最 前方的一个铅门帘12还没有运行到第三位置153处，而造成射线泄露，采用铅门帘屏蔽射线的方法还包括根据铅门帘在工作区和待命区中的运行状况以及检测通道中待检测物品的分布情况，停止将待命区内的铅门帘向工作区转移。具体地，当出现下列情况中的至少一种时，待命区内的铅门帘停止向工作区转移：检测通道内的铅门帘的数量大于两个时；或者距离上一个铅门帘由待命区转移至工作区的时间小于预设的时间间隔。
在一个示例中，当检测通道10内有两个及以上铅门帘12时(如图3所示)，第二驱动单元18对第二传送带14和14’的间歇性运动触发将会失效，即待命区155内的铅门帘12停止向工作区156转移；以及当任意一个铅门帘12落入至检测通道10的起始端101后(如7B所示)，在预设停止落入时间(秒级)内，第二驱动单元18对第二传送带14和14’的间歇性运动触发将会失效，即待命区内的铅门帘停止向工作区转移。
根据本发明的实施例，采用铅门帘屏蔽射线的方法还包括当一个铅门帘由待命区转移至工作区时，位于待命区内该铅门帘后方的铅门帘即向前移动一定距离。该一定距离由两个第二挡块之间的距离以及第二驱动机构的间歇转动的转速决定，即处于待命区的铅门帘的移动距离由第二传动机构每被触发运动一次，处于其上的第二挡块的移动距离决定。每触发一次第二传送带上的第二挡块的移动距离，根据第二传送带上的挡块布置密度确定，示例性地，可以将第二传送带被触发后，其上第二挡块的移动距离设为等于相邻两个第二挡块之间的间距，当然也可以根据其他情况进行设置，只要能够保证第二传动机构每被触发一次，处于待命区155中第二挡块141和第二挡块146处的铅门帘12能够到达第四位置154处并通过自由落体运动被移送至第一位置151处即可。具体地，根据图7A和图7B中示出的实施例，当处于第二挡块141和第二挡块146之间的铅门帘12(图7A所示)被送至第一位置151后(图7B所示)，处于第二挡块145和第二挡块146之间的铅门帘12(图7A所示)即被带动，移到至第二挡块141和第 二挡块146之间处于待命状态(图7B所示)。以保证在待命区155的铅门帘12被转移到工作区156后，待命区155中接近起始端的位置处存储有容易被第二传送带14和14’的间歇运动带动并转移至工作区156的铅门帘，使多个铅门帘12的分布情况被适应性地调节，保证其可在检测通道10中起到良好的屏蔽效果。
根据本发明的实施例，本发明采用铅门帘屏蔽射线的方法还包括当位于待命区内靠近工作区的铅门帘通过一次移动后，无法被转移到工作区时，该铅门帘可向前进行多次移动，使其能够被转移至工作区。具体地，如图6A所示，在铅门帘防护装置1的运行过程中，当必须要有铅门帘12被释放至检测通道10的起始端101处时，而此时待命区没有可以通过一次移动被带动至第四位置154处并被释放到第一位置151处的铅门帘12(假设图中第二挡块141和第二挡块146之间没有铅门帘12)，此时，第二驱动单元18需连续多次触发第二传送带14和14’的间歇性运动，即，使第二传送带14和14’带动处于其他挡块之间的铅门帘12多次移动，直到有铅门帘12被释放至第一位置151处为止。
根据本发明的实施例，还示例性地示出了安装有上述的铅门帘防护装置1的安全检测装置100，请参见图9，示出的根据本发明实施例的安全检测装置100的整体结构示意图，图中，安全检测装置100包括两端设置的两个铅门帘防护装置1，以及安装于中间的射线源装置3，即通过两个铅门帘防护装置1与一个射线源装置3共同配合为检测物品2提供完成的检测通道。因为本发明实施例的安全检测装置100具有上述的铅门帘防护装置1，因此其同样可以根据运输胶带机上检测物品的分布情况，适应性地调整多个铅门帘的分布，在不影响检测效率的基础上能够保持良好的屏蔽效果。本发明实施例提供的铅门帘防护装置和采用铅门帘屏蔽射线的方法，通过设置两套传动机构相互配合，可以根据运输胶带机上检测物品的分布情况，适应性地的调整铅门帘间的间距，在不影响检测效率的基础上能够保持良好的屏蔽效果。
尽管已经参考示例性实施例描述了本发明，但是应理解，本发明 并不限于上述实施例的构造和方法。相反，本发明意在覆盖各种修改例和等同配置。另外，尽管在各种示例性结合体和构造中示出了所公开发明的各种元件和方法步骤，但是包括更多、更少的元件或方法的其它组合也落在本发明的范围之内。

Claims (14)

  1. 一种用于检测装置的铅门帘防护装置，包括：
    至少两个铅门帘，用于屏蔽检测通道内的射线；
    支撑机构，包括工作区和待命区，所述工作区内容纳有所述检测通道，所述待命区用于存储未在所述工作区内使用的所述铅门帘；
    第一传动机构，用于带动所述铅门帘在所述检测通道内运动；和
    第二传动机构，用于使所述铅门帘在所述待命区和工作区之间转移，其中，
    所述第二传动机构用于将所述铅门帘从所述待命区转移至所述工作区，使其落入检测通道的起始端并位于待检测物品的后侧；所述第一传动机构用于带动落入所述检测通道内的所述铅门帘跟随其前方的所述待检测物品同步移动，并且使所述铅门帘由所述工作区的起始端运动至所述待命区的起始端；所述第二传动机构还用于：当所述铅门帘运动至所述待命区的起始端时，带动所述铅门帘进入所述待命区，并在所述待命区内移动。
  2. 根据权利要求1所述的铅门帘防护装置，还包括设置于所述支撑机构上的导向机构，所述导向机构用于引导所述铅门帘在所述工作区和待命区内的运动轨迹。
  3. 根据权利要求1所述的铅门帘防护装置，其中，所述第一传动机构包括第一传送带，所述第一传送带上沿其周向设置有第一挡块，所述第一传送带用于通过所述第一挡块带动所述铅门帘移动。
  4. 根据权利要求3所述的铅门帘防护装置，其中，所述第一传动机构还包括用于连续驱动所述第一传送带匀速转动的第一驱动单元。
  5. 根据权利要求1所述的铅门帘防护装置，其中，所述第二传动机构包括第二传送带，所述第二传送带上沿其周向设有第二挡块，所述第二挡块的数量与所述待命区内可存储的铅门帘数量相对应，所述第二传送带用于通过所述第二挡块带动所述铅门帘进入或者离开所述 待命区、或使所述铅门帘在所述待命区内移动。
  6. 根据权利要求5所述的铅门帘防护装置，其中，所述第二传动机构还包括用于间歇式驱动所述第二传送带转动的第二驱动单元，所述第二驱动单元每驱动所述第二传送带转动一次，每个所述第二挡块即向前移动任意两个所述挡块之间的距离。
  7. 根据权利要求6所述的铅门帘防护装置，其中，所述第二驱动单元用于在出现下列情况中的至少一种时，驱动所述第二传送带转动一次：
    所述待检测物品完全进入所述检测通道内；
    任一个所述铅门帘运动至所述检测通道的结束端，并且即将从所述工作区进入所述待命区；
    所述检测通道内仅有一个铅门帘，并且该铅门帘已经运行至所述检测通道的结束端。
  8. 根据权利要求1所述的铅门帘防护装置，还包括检测机构，所述检测机构包括用于检测所述待检测物品与所述检测通道的相对位置的第一检测机构和用于检测所述铅门帘的运行状态与分布情况的第二检测机构。
  9. 一种屏蔽射线的方法，包括：
    将铅门帘从待命区转移至工作区，使其落入检测通道的起始端并位于待检测物品的后侧；
    带动落入所述检测通道内的所述铅门帘跟随其前方的所述待检测物品同步移动，使所述铅门帘由所述检测通道的起始端运动至所述待命区的起始端；和
    将运动至所述待命区的起始端的所述铅门帘转移进入所述待命区，并在所述待命区内移动。
  10. 根据权利要求9所述的屏蔽射线的方法，还包括，检测所述待检测物品与所述检测通道的相对位置，以控制在所述待命区和工作区之间转移所述铅门帘的时间。
  11. 根据权利要求9所述的屏蔽射线的方法，其中，当出现下列 情况中的至少一种时，使所述待命区内的所述铅门帘转移至所述工作区：
    所述待检测物品完全进入所述检测通道内；
    所述检测通道内仅有一个铅门帘，并且该铅门帘已经运行至所述检测通道的结束端。
  12. 根据权利要求9所述的屏蔽射线的方法，其中，当出现下列情况中的至少一种时，所述待命区内的所述铅门帘停止向所述工作区转移：
    所述检测通道内的铅门帘的数量大于两个；
    距离上一个铅门帘由所述待命区转移至所述工作区的时间小于预设的时间间隔。
  13. 根据权利要求9所述的屏蔽射线的方法，其中，每当一个所述铅门帘由所述待命区转移至所述工作区时，位于所述待命区内该铅门帘后方的所述铅门帘即向前移动一定距离。
  14. 根据权利要求13所述的屏蔽射线的方法，其中，当位于所述待命区内靠近所述工作区的所述铅门帘通过一次移动后，无法被转移到所述工作区时，该铅门帘可向前进行多次移动，使其能够被转移至所述工作区。
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