WO2019104902A1 - 一种闪烁检测器的密封夹具 - Google Patents

一种闪烁检测器的密封夹具 Download PDF

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Publication number
WO2019104902A1
WO2019104902A1 PCT/CN2018/079008 CN2018079008W WO2019104902A1 WO 2019104902 A1 WO2019104902 A1 WO 2019104902A1 CN 2018079008 W CN2018079008 W CN 2018079008W WO 2019104902 A1 WO2019104902 A1 WO 2019104902A1
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Prior art keywords
kit
scintillator
arm
scintillation detector
housing
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PCT/CN2018/079008
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English (en)
French (fr)
Inventor
刘飞
谭忠强
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苏州绿磁精密仪器有限公司
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Publication of WO2019104902A1 publication Critical patent/WO2019104902A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/20—Measuring radiation intensity with scintillation detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T7/00—Details of radiation-measuring instruments

Definitions

  • the present invention relates to the field of scintillation detectors, and in particular to a sealing fixture for a scintillation detector.
  • the scintillation detector is a kind of detector which is more common in the field of radiation detection.
  • the scintillation detector is mainly composed of a scintillator and a photomultiplier tube.
  • most of the scintillators used are sodium iodide and cesium iodide, which are glass crystals having a density of more than 4, and the photomultiplier tube is an optical glass casing.
  • a typical scintillator has a rectangular shape and is connected to a photomultiplier tube.
  • a typical scintillation detector uses a circular photomultiplier tube. The scintillator and photomultiplier tube are typically bonded to the inner surface of the light pipe.
  • the scintillation detector In normal use, the scintillation detector is often subjected to various degrees of shock or vibration. Due to impact, vibration, temperature changes, etc., the scintillator and the photomultiplier tube are often separated, and even the glass material scintillator and the photomultiplier tube are broken. Therefore, it is necessary to provide a jig to maintain the relative fixation of the scintillator and the photomultiplier tube.
  • Existing fixtures for scintillation detectors typically include an elastomeric shield that can be telescoped on a scintillation detector, or simply simply cover the scintillator with a reflective material and then insert it into a metal sleeve and secure it with a bolt, or both ends Tighten with a long rod.
  • FIG. 1 shows a block diagram of a scintillation detector according to the prior art.
  • the scintillation detector comprises a scintillator 1, a scintillator housing 2, a kit 3, a photoconductor 4 (not shown), a photomultiplier tube housing 5 and a photomultiplier tube 6.
  • the photoconductor 4 is located inside the kit 3, and one end of the kit 3 is provided with a rectangular opening having the same cross-sectional shape as the scintillator 1, and the scintillator 1 is inserted into the kit 3 through a rectangular opening, and screw holes are provided at both end faces of the kit 3, and the bolts are used.
  • the photomultiplier tube housing 5 is fixed to the kit 3.
  • the scintillator 1 is located inside the scintillator casing 2, and the photomultiplier tube 6 is located inside the photomultiplier tube casing 5, and the end faces of the two are in contact with the end faces of the photoconductor 4, and are bonded by photogel.
  • a plurality of through holes are formed in the side wall of the kit 3, and the set bolts are inserted, and the fixing bolts are adjusted to fix the scintillator 1.
  • the fixing effect of the existing jig is not good, and the sealing of the jig is less considered.
  • impurities easily enter the metal bushing, and the punching may cause damage to the integrity of the detector and affect the light of the detector.
  • Signal acquisition and over-tightening of the bolts can also cause damage to the scintillator. It is inconvenient and cumbersome to assemble with long rods at both ends. Therefore, it is necessary to design a good sealing jig for the scintillator and the photomultiplier tube.
  • the present invention provides a sealing fixture for a scintillation detector, which can prevent impurities from entering the metal sleeve, facilitates the collection of optical signals, has a good fixing effect, and has a simple structure, simple operation and reliability. High sex.
  • the invention provides a sealing fixture for a scintillation detector, comprising a kit, a spring, an elastic regulating piece and an expansion mechanism, wherein a spring and an elastic regulating piece are arranged inside the sleeve, and the elastic regulating piece is L-shaped, including the first arm And a second arm, the first arm is fixedly coupled to one end of the spring, the second arm covers the first end surface of the kit, and the length of the second arm is greater than the height of the end surface, and the expansion mechanism is used to adjust between the two opposing first arms The relative distance of the expansion mechanism is fixedly connected to the second arm respectively, and the adjustment expansion mechanism can drive the elastic regulating piece to move.
  • the present invention provides a scintillation detector comprising a scintillator, a scintillator housing, a photoconductor, a photomultiplier tube housing, a photomultiplier tube, and a sealing fixture according to the present invention, the photoconductor being located inside the kit.
  • a rectangular opening having the same cross-sectional shape as the scintillator is opened at one end of the kit, and the scintillator is inserted into the kit through the rectangular opening.
  • the scintillator is located inside the scintillator housing, and the photomultiplier tube is located inside the photomultiplier tube housing, and the end faces of the two are in contact with the end faces of the photoconductor and bonded by photogel.
  • the expansion mechanism is disposed outside the scintillator housing.
  • the second end surface of the kit is provided with an internal thread opening
  • one end of the photomultiplier tube housing is provided with an external thread
  • the kit and the photomultiplier tube housing are screwed.
  • the first end surface of the kit 3 has an extended extension
  • the second arm of the elastic regulating piece has a chamfered portion with a groove
  • the groove of the chamfered portion is adapted to accommodate the extended epitaxy .
  • the first end surface of the kit has a first extended epitaxial portion, and has a second extended epitaxy at one end of the scintillator housing, and a through hole is formed in the first extended epitaxial and the second extended epitaxy, and the second arm of the elastic regulating piece is An extended through hole is provided at the corresponding position, through the bolt fixing kit and the scintillator housing.
  • the material of the elastic regulating piece is silica gel.
  • the invention does not need to fix the scintillator and the photomultiplier tube by bolts, improves the sealing property by using the elastic regulating piece, can effectively improve the collection efficiency of the optical signal, has a good fixing effect, and has the advantages of simple structure, simple operation and high reliability. Very good for use in scintillation detectors.
  • Figure 1 shows a structural view of a scintillation detector according to the prior art
  • Figure 2 shows a cross-sectional view of a scintillation detector in accordance with the present invention
  • FIG. 3 shows details of a sealing fixture in accordance with a preferred embodiment of the present invention
  • FIG. 4 shows details of a sealing fixture in accordance with another preferred embodiment of the present invention.
  • Embodiments of the present invention provide a sealing jig for a scintillation detector, and the technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
  • FIG. 2 shows the specific details of the scintillation detector of the present invention.
  • the scintillation detector of the present invention comprises a scintillator 1, a scintillator housing 2, a U-shaped kit 3, a photoconductor 4, a photomultiplier tube housing 5 and a photomultiplier tube 6.
  • the photoconductor 4 is located inside the kit 3, and one end of the kit 3 is provided with a rectangular opening having the same cross-sectional shape as that of the scintillator 1, and the scintillator 1 is inserted into the kit 3 through a rectangular opening.
  • the scintillator 1 is located inside the scintillator casing 2, and the photomultiplier tube 6 is located inside the photomultiplier tube casing 5, and the end faces of the two are in contact with the end faces of the photoconductor 4, and are bonded by photogel.
  • the above settings are the same as in the prior art.
  • the sealing jig of the scintillation detector of the present invention comprises a kit 3, a spring 7, an elastic regulating piece 8 and an expansion mechanism 9.
  • a spring 7 and an elastic regulating piece 8 are disposed inside the kit 3, and the elastic regulating piece 8 is L-shaped, and includes a first arm 81 and a second arm 82.
  • the first arm 81 is fixedly connected to one end of the spring 7, and the second arm 82 is fixedly connected.
  • the first end face 31 of the kit 3 is covered, and the length of the second arm 82 is greater than the height of the end face 31.
  • the scintillation detector of the present invention is also provided with an expansion mechanism 9 for adjusting the relative distance between the two opposing first arms 81.
  • the expansion mechanism 9 is disposed outside the scintillator housing 2, and both ends of the expansion mechanism 9 are fixedly coupled to the second arm 82, respectively, and the adjustment expansion mechanism 9 can drive the elastic regulating piece 8 to move.
  • the second end face 32 of the kit 3 is provided with an internally threaded opening, one end of the photomultiplier tube housing 5 is provided with an external thread, and the kit 3 and the photomultiplier tube housing 5 are screwed.
  • Figure 3 shows a preferred embodiment of the invention in which the first end face 31 of the sleeve 3 has an expanded extension 311 and the second arm 82 of the resilient flap 8 has a chamfered chamfer 821.
  • the recess of the chamfered portion 821 is adapted to accommodate the expanded extension 311.
  • Figure 4 shows a further preferred embodiment of the invention in which the first end face 31 of the kit 3 has a first extended extension 311 and a second expanded extension 21 at one end of the scintillator housing 2.
  • a through hole is formed in the first extended extension 311 and the second extended extension 21, and an extended through hole is formed in a corresponding position of the second arm 82 of the elastic regulating piece 8, and is realized by the bolt fixing kit 3 and the scintillator housing 2 The seal of the kit 3 with the scintillator 1.
  • the working principle of the present invention is as follows.
  • the adjusting expansion mechanism 9 can drive the elastic regulating piece 8 to move, so that the opening formed by the elastic regulating piece 8 is enlarged, or the opening formed by the elastic regulating piece 8 is reduced under the elastic force of the spring 7, and the scintillating body is facilitated when the opening is enlarged.
  • the first arm 81 of the elastic regulating piece 8 is pressed against the scintillator 1 by the elastic force of the spring 7, and the fixing of the kit 3 and the scintillator 1 is achieved.
  • the second arm 82 of the elastic regulating piece 8 covers the first end face 31 of the kit 3, and the scintillator housing 2 abuts against the second arm 82, so that the seal of the kit 3 and the scintillator 1 is achieved.
  • the kit 3 and the photomultiplier tube housing 5 are then threaded.
  • the material of the elastic regulating piece is silica gel. Due to the elasticity of the silicone itself, the spring does not damage the scintillator and can achieve a good sealing.
  • the elastic regulating piece and the spring of the invention have a vibration damping effect, and when the scintillation detector receives an external force impact, the external force can be effectively absorbed, so that the connection between the scintillator and the photomultiplier tube is more stable.
  • the elastic regulating piece of the present invention can also achieve a seal between the kit and the scintillator housing.
  • the invention can avoid the opening of the kit by the screw connection kit and the photomultiplier tube housing, thereby ensuring the integrity of the scintillation detector and improving the collection efficiency of the optical signal.

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Abstract

一种闪烁探测器的密封夹具，包括套件（3），弹簧（7），弹性调节片（8）和扩张机构（9），在套件（3）的内部设置有弹簧（7）和弹性调节片（8），弹性调节片（8）呈L型，包括第一臂（81）和第二臂（82），第一臂（81）与弹簧（7）的一端固定连接，第二臂（82）覆盖套件（3）的第一端面，且第二臂（82）的长度大于端面的高度，扩张机构（9）用于调节两个相对的第一臂（81）之间的相对距离，扩张机构（9）的两端分别与第二臂（82）固定连接，调节扩张机构（9）可以带动弹性调节片（8）活动。还提出一种闪烁探测器。该密封夹具，可以防止杂质进入金属套管，有利于光信号的采集，具有良好的固定效果，并且结构简单，操作简便，可靠性高。

Description

一种闪烁检测器的密封夹具 技术领域
本发明涉及闪烁检测器领域，具体而言，涉及一种闪烁检测器的密封夹具。
背景技术
闪烁探测器是辐射探测领域较为常见的一类探测器，闪烁探测器主要由闪烁体和光电倍增管组成。目前使用较多的闪烁体是碘化钠和碘化铯，它们均为密度大于4的玻璃晶体，光电倍增管采用的是光学玻璃外壳。典型的闪烁体具有矩形形状，并连接到光电倍增管，典型的闪烁探测器使用圆形的光电倍增管。闪烁体和光电倍增管一般粘接到光导管的内表面。
在正常使用时，闪烁探测器经常承受各种程度的冲击或振动。由于冲击、振动、温度变化等原因，闪烁体和光电倍增管经常分离，甚至导致玻璃材质的闪烁体和光电倍增管破碎。因此，需要提供夹具来保持闪烁体和光电倍增管的相对固定。
闪烁探测器的现有的夹具一般包括可在闪烁探测器上伸缩的弹性保护罩，或者只是简单地用反射材料包覆闪烁体然后插入金属套管中，并利用螺栓打孔固定，或两端用长杆拉紧。
图1显示了按照现有技术的闪烁探测器的结构图。如图1所示，该闪烁探测器包括闪烁体1，闪烁体壳体2，套件3，光导体4(未显示)，光电倍增管壳体5和光电倍增管6。光导体4位于套件3内部，套件3一端开设有与闪烁体1 的截面形状相同的矩形开口，闪烁体1通过矩形开口插入套件3，在套件3的两个端面设置有螺孔，利用螺栓将光电倍增管壳体5与套件3固定。闪烁体1位于闪烁体壳体2内部，光电倍增管6位于光电倍增管壳体5内部，两者的端面与光导体4的端面接触，并通过光凝胶粘接。在套件3的侧壁开设有若干通孔，插入紧定螺栓，调节紧定螺栓固定闪烁体1。
但是现有的夹具的固定效果不佳，且较少考虑夹具的密封，在实际操作过程中，杂质容易进入金属套管中，并且打孔会导致破坏探测器的完整性，影响探测器的光信号采集，螺栓固定过紧还会导致闪烁体损坏，两端用长杆拉紧的方式装配不方便且比较笨重。因此，需要为闪烁体和光电倍增管设计一个良好的密封夹具。
发明内容
为了克服上述背景技术的缺点，本发明提供的一种闪烁检测器的密封夹具，可以防止杂质进入金属套管，有利于光信号的采集，具有良好的固定效果，并且结构简单，操作简便，可靠性高。
为实现本发明的发明目的，本发明的技术方案如下：
一方面，本发明提出一种闪烁探测器的密封夹具，包括套件，弹簧，弹性调节片和扩张机构，在套件的内部设置有弹簧和弹性调节片，弹性调节片呈L型，包括第一臂和第二臂，第一臂与弹簧的一端固定连接，第二臂覆盖套件的第一端面，且第二臂的长度大于端面的高度，扩张机构用于调节两个相对的第一臂之间的相对距离，扩张机构的两端分别与第二臂固定连接，调节扩张机构可以带动弹性调节片活动。
另一方面，本发明提出一种闪烁探测器，包括闪烁体，闪烁体壳体，光导体，光电倍增管壳体，光电倍增管，还包括本发明提出的密封夹具，光导体位于套件内部，套件一端开设有与闪烁体的截面形状相同的矩形开口，闪烁体通过矩形开口插入套件。闪烁体位于闪烁体壳体内部，光电倍增管位于光电倍增管壳体内部，两者的端面与光导体的端面接触，并通过光凝胶粘接。
其中，扩张机构设置在闪烁体壳体的外部。
其中，套件的第二端面设置有内螺纹开孔，光电倍增管壳体的一端设置有外螺纹，套件和光电倍增管壳体通过螺纹连接。
其中，套件3的第一端面具有扩展外延，弹性调节片的第二臂具有带凹槽的倒角部，当套件与闪烁体壳体完成固定后，倒角部的凹槽适于容纳扩展外延。
其中，套件的第一端面具有第一扩展外延，在闪烁体壳体的一端具有第二扩展外延，在第一扩展外延和第二扩展外延上开设通孔，在弹性调节片的第二臂的相应位置开设延长型通孔，通过螺栓固定套件和闪烁体壳体。
其中，弹性调节片的材料为硅胶。
本发明不需要用螺栓固定闪烁体和光电倍增管，利用弹性调节片提高了密封性，可有效提高光信号的采集效率，具有良好的固定效果，并且结构简单，操作简便，可靠性高，可以很好的应用于闪烁探测器中。
通过参照以下附图及对本发明的具体实施方式的详细描述，本发明的特征及优点将会变得清楚。
附图说明
图1显示了按照现有技术的闪烁探测器的结构图；
图2显示了按照本发明的闪烁探测器的截面图；
图3显示了按照本发明的优选实施方式的密封夹具的细节；
图4显示了按照本发明的另一优选实施方式的密封夹具的细节。
具体实施方式
本发明的实施方式提供了一种闪烁检测器的密封夹具，下面结合附图对本发明的技术方案进行详细说明。
图2显示了本发明的闪烁探测器的具体细节。如图2所示，本发明的闪烁探测器包括闪烁体1，闪烁体壳体2，U形套件3，光导体4，光电倍增管壳体5和光电倍增管6。光导体4位于套件3内部，套件3一端开设有与闪烁体1的截面形状相同的矩形开口，闪烁体1通过矩形开口插入套件3。闪烁体1位于闪烁体壳体2内部，光电倍增管6位于光电倍增管壳体5内部，两者的端面与光导体4的端面接触，并通过光凝胶粘接。上述设置与现有技术相同。
本发明的闪烁探测器的密封夹具包括套件3，弹簧7，弹性调节片8和扩张机构9。
在套件3的内部设置有弹簧7和弹性调节片8，弹性调节片8呈L型，包括第一臂81和第二臂82，第一臂81与弹簧7的一端固定连接，第二臂82覆盖套件3的第一端面31，且第二臂82的长度大于端面31的高度。
本发明的闪烁探测器还设置有扩张机构9，扩张机构9用于调节两个相对的第一臂81之间的相对距离。具体来说，扩张机构9设置在闪烁体壳体2的外部，扩张机构9的两端分别与第二臂82固定连接，调节扩张机构9可以带动弹性调节片8活动。
套件3的第二端面32设置有内螺纹开孔，光电倍增管壳体5的一端设置有外螺纹，套件3和光电倍增管壳体5通过螺纹连接。
图3显示了本发明的一个优选实施方式，在该优选实施方式中，套件3的第一端面31具有扩展外延311，弹性调节片8的第二臂82具有带凹槽的倒角部821。当套件3与闪烁体壳体2完成固定后，倒角部821的凹槽适于容纳扩展外延311。
图4显示了本发明的另一优选实施方式，在该另一优选实施方式中，套件3的第一端面31具有第一扩展外延311，在闪烁体壳体2的一端具有第二扩展外延21，在第一扩展外延311和第二扩展外延21上开设通孔，在弹性调节片8的第二臂82的相应位置开设延长型通孔，通过螺栓固定套件3和闪烁体壳体2，实现套件3与闪烁体1的密封。
本发明的工作原理是如下。调节扩张机构9可以带动弹性调节片8活动，使得弹性调节片8所形成的开口扩大，或在弹簧7的弹力作用下，使得弹性调节片8所形成的开口缩小，开口扩大时便于将闪烁体1插入套件3中，开口缩小时利用弹簧7的弹力使弹性调节片8的第一臂81抵紧闪烁体1，实现套件3与闪烁体1的固定。另一方面，弹性调节片8的第二臂82覆盖套件3的第一端面31，将闪烁体壳体2抵紧第二臂82，实现套件3与闪烁体1的密封。然后通 过螺纹连接套件3和光电倍增管壳体5。
弹性调节片的材料为硅胶，由于硅胶自身的弹性，弹簧不会对闪烁体造成损坏，并能很好地实现密封。
本发明的弹性调节片和弹簧具有减振作用，当闪烁探测器收到外力冲击时，可有效吸收外力，使闪烁体和光电倍增管的连接更稳固。同时本发明的弹性调节片还可以实现套件与闪烁体壳体之间的密封。
本发明通过螺纹连接套件和光电倍增管壳体，可以避免在套件上开孔，从而保证了闪烁探测器的完整性，提高了光信号的采集效率。
以上所描述的仅是说明性，并且要理解的是，本文所描述的布置和细节的修改和变化对于本领域技术人员而言将是明显的，在没有脱离本发明的发明构思的前提下，任何显而易见的替换均在本发明保护范围之内。因此，意在仅由所附权利要求的范围而不是由通过以上描述和解释的方式所呈现的特定细节来限制。

Claims (7)

  1. 一种闪烁探测器的密封夹具，其特征在于，包括套件3，弹簧7，弹性调节片8和扩张机构9，
    在套件3的内部设置有弹簧7和弹性调节片8，
    弹性调节片8呈L型，包括第一臂81和第二臂82，第一臂81与弹簧7的一端固定连接，第二臂82覆盖套件3的第一端面31，且第二臂82的长度大于端面31的高度，
    扩张机构9用于调节两个相对的第一臂81之间的相对距离，扩张机构9的两端分别与第二臂82固定连接，调节扩张机构9可以带动弹性调节片8活动。
  2. 一种闪烁探测器，包括闪烁体1，闪烁体壳体2，光导体4，光电倍增管壳体5，光电倍增管6，其特征在于，还包括权利要求1所述的密封夹具，光导体4位于套件3内部，套件3一端开设有与闪烁体1的截面形状相同的矩形开口，闪烁体1通过矩形开口插入套件3。闪烁体1位于闪烁体壳体2内部，光电倍增管6位于光电倍增管壳体5内部，两者的端面与光导体4的端面接触，并通过光凝胶粘接。
  3. 如权利要求2所述的闪烁探测器，其中，扩张机构9设置在闪烁体壳体2的外部。
  4. 如权利要求2所述的闪烁探测器，其中，套件3的第二端面32设置有内螺纹开孔，光电倍增管壳体5的一端设置有外螺纹，套件3和光电倍增管壳体5 通过螺纹连接。
  5. 如权利要求2所述的闪烁探测器，其中，套件3的第一端面31具有扩展外延311，弹性调节片8的第二臂82具有带凹槽的倒角部821，当套件3与闪烁体壳体2完成固定后，倒角部821的凹槽适于容纳扩展外延311。
  6. 如权利要求2所述的闪烁探测器，其中，套件3的第一端面31具有第一扩展外延311，在闪烁体壳体2的一端具有第二扩展外延21，在第一扩展外延311和第二扩展外延21上开设通孔，在弹性调节片8的第二臂82的相应位置开设延长型通孔，通过螺栓固定套件3和闪烁体壳体2。
  7. 如权利要求2所述的闪烁探测器，其中，弹性调节片8的材料为硅胶。
PCT/CN2018/079008 2017-11-29 2018-03-14 一种闪烁检测器的密封夹具 WO2019104902A1 (zh)

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