WO2021258710A1 - 一种密封圈密封性能粗检漏用测试装置及方法 - Google Patents

一种密封圈密封性能粗检漏用测试装置及方法 Download PDF

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WO2021258710A1
WO2021258710A1 PCT/CN2020/141950 CN2020141950W WO2021258710A1 WO 2021258710 A1 WO2021258710 A1 WO 2021258710A1 CN 2020141950 W CN2020141950 W CN 2020141950W WO 2021258710 A1 WO2021258710 A1 WO 2021258710A1
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sealing ring
sealing
top cover
leak detection
test device
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PCT/CN2020/141950
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English (en)
French (fr)
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张伟健
夏泓玮
王航
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北京品驰医疗设备有限公司
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Publication of WO2021258710A1 publication Critical patent/WO2021258710A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/005—Sealing rings

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  • the invention belongs to the technical field of sealing performance detection, and in particular relates to a testing device for rough leak detection of the sealing performance of a sealing ring and a testing method thereof.
  • Implantable medical equipment includes cardiac pacemakers, brain pacemakers, etc.
  • the sealing ring is a basic component of this type of equipment, and one of its main functions is to prevent the intrusion of body fluids from short-circuiting the electrode contacts. After the device is short-circuited, the power consumption will increase and the product experience will deteriorate. Therefore, it is very necessary to test the sealing performance of the sealing ring, but no institutions at home and abroad provide the sealing performance test of this type of product in this field. Therefore, the present invention is designed for the rough leak detection of the sealing performance of the sealing ring of the implantable medical device. A sealed air cavity.
  • the present invention proposes a test device for rough leak detection of the sealing performance of a sealing ring and a use method thereof.
  • the first aspect of the present invention provides a test device for rough leak detection of the sealing performance of a sealing ring, which includes: a sealing ring matching insert, a housing, a top cover, and a gas quick connector;
  • the housing includes an upper end and a lower end; the upper end has a stop for inserting the top cover; the lower end has a mounting hole for installing the gas quick-plug connector;
  • the gas quick plug connector is used to connect to an external gas source, and the external gas source can output gas with a controllable gas pressure;
  • the sealing ring is matched with an insert for inserting into the sealing ring when the sealing performance of the sealing ring is tested.
  • the top cover is in clearance fit with the housing and sealed by laser welding.
  • the diameter of the through hole of the top cover is smaller than the diameter of the exposed end of the sealing ring and larger than the diameter of the insertion end of the sealing ring, and the sealing ring is inserted into the through hole for clearance fit.
  • the depth of the through hole is greater than the thickness of the working surface of the sealing ring.
  • the sealing ring is inserted into the sealing ring with an insert to compress the working surface of the sealing ring, thereby producing a sealing effect.
  • the sealing ring mating insert is a standard plug or electrode.
  • the mounting hole of the lower end portion is a threaded hole.
  • the material of the housing and the top cover is stainless steel.
  • the outer shape of the housing is a cylindrical shape with a diameter of no more than 40 mm, and the volume of the inner cavity is less than 15 mL, and can withstand at least 2 standard atmospheres.
  • the present invention provides a test method using the above-mentioned test device for rough leak detection of the sealing performance of the sealing ring, which includes:
  • the present invention designs a testing device for rough leak detection of sealing performance for the sealing ring of implantable medical devices, which can be tested by the bubble method, has the characteristics of easy assembly, easy operation, etc., and is an implantable medical device in this field.
  • the rough leak detection project of the sealing performance of the sealing ring provides a convenient and easy-to-observe specific test method.
  • Figure 1 is a schematic diagram of the tested sealing ring
  • Figure 2 is a cross-sectional view of the testing device of the present invention when in use
  • Figure 3 is a cross-sectional view of the housing of the test device of the present invention.
  • Figure 4 is a cross-sectional view of the top cover of the test device of the present invention.
  • Figure 5 is a cross-sectional view of the working surface of the testing device of the present invention when in use;
  • Fig. 6 is a schematic diagram of rough leak detection by bubble method using the test device of the present invention.
  • each reference sign is as follows: 1-seal ring, 2-liquid silicone rubber, 3-seal ring mating insert, 4-housing, 5-top cover, 6-gas quick connector, 7-stop, 8 -Threaded hole, 9-through hole, 10-working surface.
  • FIG. 1 is a schematic diagram of the sealing ring to be tested.
  • the sealing ring is a basic component of implantable medical equipment such as cardiac pacemakers and brain pacemakers. Its structure mainly includes an exposed end 11, an insertion end 12, and a working surface 10 inside.
  • the sealing performance test of the sealing ring is converted into a sealing performance test of the sealed air cavity.
  • This type of test has standard test parameters, divided into air tightness test coarse leak detection and air tightness test fine leak detection.
  • the bubble method is used for rough leak detection.
  • the test follows the specific test standards of Part Methods A, B, and D in the section Method 112 Sealing Test in "GJB 360B-2009 Test Methods for Electronic and Electrical Components".
  • FIG. 2 is a structural diagram of the testing device of the present invention when in use.
  • the test device includes a sealing ring fitting insert 3, a housing 4, a top cover 5, and a gas quick-plug connector 6.
  • the test is performed by connecting to an external gas source with controllable air pressure through the gas quick-plug connector 6.
  • the sealing ring mating insert 3 is a standard plug or electrode.
  • the sealing ring 1 (the tested sealing ring) is installed on the sealing ring mating insert 3.
  • FIG 3 is a structural diagram of the housing of the testing device of the present invention.
  • the outer shell 4 is made of stainless steel, the shape is a cylindrical shape with a diameter of no more than 40mm, and it has an inner cavity whose volume is below 15 mL and can withstand at least 2 standard atmospheric pressures.
  • the upper end of the housing 4 has a stopper 7 that can be inserted into the top cover 5 to cooperate with it; the lower end of the housing 4 has a mounting hole 8 for installing a gas quick connector 6.
  • the mounting hole 8 is a threaded hole.
  • FIG 4 is a structural diagram of the top cover of the testing device of the present invention.
  • the top cover 5 is preferably made of stainless steel and is placed in the stop 7 of the housing 4, and the top cover 5 and the housing 4 are in clearance fit.
  • the top cover 5 and the outer shell 4 are welded using a laser welding machine, and the joint is sealed with a higher level and the sealing test is performed after welding, that is, the through hole needs to be blocked to check the weld gas after welding. Tightness.
  • the top cover 5 has a through hole 9 for inserting the sealing ring 1.
  • the diameter of the through hole 9 is smaller than the diameter of the exposed end of the sealing ring 1 and larger than the diameter of the insertion end of the sealing ring 1.
  • the through hole 9 and the insertion end of the sealing ring 1 have a clearance fit.
  • Figure 5 is a cross-sectional view of the working surface of the testing device of the present invention when in use.
  • the sealing liquid silicone rubber 2 is coated around the joint, so that the sealing ring 1 is sealed and fixed on the top cover 5.
  • the thickness H of the top cover 5 needs to ensure that the thickness can completely cover the working surface 10 of the sealing ring 1.
  • FIG. 6 is a schematic diagram of the rough leak detection of the sealing ring 1 by the bubble method using the testing device of the present invention.
  • the steps of using the test device of the present invention to perform a rough leak detection test on the air tightness of the sealing ring are as follows.
  • the sealing ring 1 is inserted into the through hole 9 of the top cover 5, and liquid silicone rubber 2 for sealing is coated around the joints, so that the sealing ring 1 is sealed and fixed on the top cover 5.
  • the sealing ring fitting insert 3 is inserted into the sealing ring 1, and the gas quick connector 6 at the lower end is connected to the trachea, and the pressure gauge is controlled to fill with dry and clean air to an atmospheric pressure.
  • the transparent container is a glass beaker
  • the transparent liquid is water
  • the present invention can also be used with a tracer gas fine leak detection method to comprehensively evaluate and compare the sealing performance of the sealing ring, and verify the design effect and production quality of the sealing ring.

Abstract

本发明提出一种密封圈密封性能粗检漏用测试装置及方法，所述测试装置包括密封圈配合插入物、外壳、顶盖、气体快插接头；外壳包括上端部和下端部，所述上端部有一止口，用于放入所述顶盖，所述下端部有一安装孔，用于安装气体快插接头；气体快插接头用于接入可控气压的外部气源；顶盖上有一通孔，用于将密封圈插入。测试时，密封圈配合插入物插入密封圈中，气体快插接头接入气管，控制压力表充入干燥洁净的空气到一个大气压；将密封气腔头部斜向下45°角没入装有透明液体的大容量的透明容器中，控制密封圈顶部位于液面以下10cm-15cm，观察密封圈和密封圈配合插入物接缝处是否有气泡生成。本发明能够对密封性能进行测试，具有易装配、易操作等特点。

Description

一种密封圈密封性能粗检漏用测试装置及方法 技术领域
本发明属于密封性能检测技术领域，尤其涉及一种密封圈密封性能粗检漏用测试装置及用其测试的方法。
背景技术
植入式医疗设备包括心脏起搏器、脑起搏器等，密封圈是该类设备一个基本组成零件，它的一个主要功能是防止体液侵入造成电极触点短路。设备短路后，功耗升高，产品的使用体验会变差。因此对密封圈密封性能的测试十分有必要，但在国内外各机构均没有提供该领域内这类产品密封性能测试，为此本发明针对植入式医疗器械的密封圈密封性能粗检漏设计了密封气腔。
发明内容
为了克服现有技术中存在的不足，本发明提出了一种密封圈密封性能粗检漏用测试装置及其使用方法。
本发明第一方面提供了一种密封圈密封性能粗检漏用测试装置，包括：密封圈配合插入物、外壳、顶盖、气体快插接头；
所述外壳包括上端部和下端部；所述上端部有一止口，用于放入所述顶盖；所述下端部有一安装孔，用于安装所述气体快插接头；
所述气体快插接头用于接入外部气源，所述外部气源能够输出可控气 压的气体；
所述顶盖上有一通孔，用于将所述密封圈插入；
所述密封圈配合插入物，用于在对密封圈密封性能进行检测时，插入所述密封圈中。
作为一种优选方案，所述顶盖与所述外壳间隙配合，并通过激光焊接密封。
作为一种优选方案，所述顶盖的所述通孔的直径小于所述密封圈的暴露端直径，大于所述密封圈的插入端直径，所述密封圈插入所述通孔为间隙配合。
作为一种优选方案，所述通孔的深度大于所述密封圈的工作面厚度。
作为一种优选方案，所述密封圈配合插入物插入所述密封圈，使所述密封圈的工作面产生压缩，从而产生密封效果。
作为一种优选方案，所述密封圈配合插入物为标准堵头或电极。
作为一种优选方案，所述下端部的所述安装孔为螺纹孔。
作为一种优选方案，所述外壳和顶盖的材质为不锈钢。
作为一种优选方案，所述外壳外形为直径不超过40mm的圆柱形，内腔体积在15mL以下，能够承受至少2个标准大气压。
另一方面，本发明提供了使用上述的密封圈密封性能粗检漏用测试装置的测试方法，包括：
将所述密封圈插入所述顶盖的通孔中，在接缝处周围涂布密封用液态硅橡胶，使所述密封圈密封固定在所述顶盖上；
在所述密封圈中插入所述密封圈配合插入物，所述气体快插接头接入 气管，充入干燥洁净的空气到一个大气压；
将所述测试装置头部斜向下45°角没入装有透明液体的透明容器中，控制所述密封圈顶部位于液面以下10cm-15cm；
观察所述密封圈和所述密封圈配合插入物接缝处是否有气泡生成。
本发明针对植入式医疗器械的密封圈设计了一种密封性能粗检漏用测试装置，能够通过气泡法进行测试，具有易装配、易操作等特点，并为该领域内植入式医疗器械密封圈密封性能粗检漏项目提供了一种便捷且易观测的具体测试方法。
附图说明
图1是被测试的密封圈示意图；
图2是本发明的测试装置在使用时的截面图；
图3是本发明的测试装置的外壳截面图；
图4是本发明的测试装置的顶盖截面图；
图5是本发明的测试装置在使用时的工作面截面图；
图6是使用本发明的测试装置进行气泡法粗检漏的示意图。
其中各个附图标记的含义如下：1-密封圈，2-液态硅橡胶，3-密封圈配合插入物，4-外壳，5-顶盖，6-气体快插接头，7-止口，8-螺纹孔，9-通孔,10-工作面。
具体实施方式
下面结合附图，对本发明的实施例作详细说明。
图1为需被测试的密封圈示意图。该密封圈为心脏起搏器、脑起搏器等植入式医疗设备的基本组成零件，其结构主要包括暴露端11、插入端 12，内部具有工作面10。在对密封圈密封性能进行测试时，密封圈和测试装置形成密封气腔，将密封圈密封性能测试转换为密封气腔的密封性能测试。该类测试拥有标准的测试参数，分为气密性测试粗检漏和气密性测试细检漏。粗检漏使用的是气泡法。测试遵循《GJB 360B-2009电子及电气元件试验方法》中方法112密封试验章节部分方法A、B、D的具体测试标准。
图2为本发明的测试装置在使用时的结构图。测试装置包括密封圈配合插入物3、外壳4、顶盖5、气体快插接头6。通过气体快插接头6接入可控气压的外部气源实施测试。在一优选的实施方式中，所述密封圈配合插入物3为标准堵头或电极。在对密封圈密封性能进行检测时，密封圈1(被测试的密封圈)安装在密封圈配合插入物3上。
图3为本发明的测试装置的外壳结构图。外壳4为不锈钢材质，外形为直径不超过40mm的圆柱形，同时拥有内腔，内腔体积在15mL以下，能够承受至少2个标准大气压。外壳4的上端部有一止口7，可以放入顶盖5与之配合；外壳4的下端部有一安装孔8，用于安装气体快插接头6。在一优选的实施方式中，所述安装孔8为螺纹孔。
图4为本发明的测试装置的顶盖结构图。顶盖5优选为不锈钢材质，放置在外壳4的止口7中，顶盖5与外壳4间隙配合。在一优选的实施方式中，顶盖5与外壳4使用激光焊接机进行焊接，接缝处为较高等级的密封并在焊后进行密封检测，即焊接后需将通孔堵塞检验焊缝气密性。顶盖5上有一通孔9可插入密封圈1。通孔9的直径小于密封圈1的暴露端直径，并且大于密封圈1的插入端直径。在一优选的实施方式中，通孔9与密封 圈1插入端为间隙配合。
图5为本发明的测试装置在使用时的工作面截面图。在密封圈1插入到通孔9中之后，在接缝处周围涂布密封用液态硅橡胶2，使密封圈1密封固定在顶盖5上。顶盖5的厚度H需要保证该厚度可完全覆盖密封圈1的工作面10。当密封圈配合插入物3插入密封圈1，使密封圈1工作面10产生压缩，从而产生密封效果。
图6为使用本发明的测试装置对密封圈1进行气泡法粗检漏的示意图。使用本发明的测试装置对密封圈进行气密性粗检漏测试的步骤如下。
将密封圈1插入顶盖5的通孔9中，在接缝处周围涂布密封用液态硅橡胶2，使密封圈1密封固定在顶盖5上。
随后，在密封圈1中插入密封圈配合插入物3，下端的气体快插接头6接入气管，控制压力表充入干燥洁净的空气到一个大气压。
将测试装置头部斜向下45°角没入大容量的装有透明液体的透明容器中，控制密封圈1顶部位于液面以下10cm-15cm。在一优选的实施方式中，所述透明容器为玻璃烧杯，所述透明液体为水。
观察密封圈1和密封圈配合插入物3接缝处是否有气泡生成，以及气泡产生的速率，按分钟记录。若产生连续的气泡则说明密封性较差，若完全无气泡产生，则说明气密性优异。
本领域技术人员能够理解，本发明还可以搭配示踪气体细检漏方法，进而全面评估和对比密封圈的密封性能，验证密封圈的设计效果和生产品质。
此实施例仅为本发明较佳的具体实施方式，但本发明的保护范围并不 局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应该以权利要求的保护范围为准。

Claims (10)

  1. 一种密封圈密封性能粗检漏用测试装置，包括密封圈配合插入物、外壳、顶盖、气体快插接头；
    所述外壳包括上端部和下端部；所述上端部有一止口，用于放入所述顶盖；所述下端部有一安装孔，用于安装所述气体快插接头；
    所述气体快插接头用于接入外部气源，所述外部气源能够输出可控气压的气体；
    所述顶盖上有一通孔，用于将所述密封圈插入；
    所述配合插入物，在对密封圈密封性能进行检测时，插入所述密封圈中。
  2. 根据权利要求1所述的一种密封圈密封性能粗检漏用测试装置，其特征在于：所述顶盖与所述外壳间隙配合，并通过激光焊接密封。
  3. 根据权利要求2所述的一种密封圈密封性能粗检漏用测试装置，其特征在于：所述顶盖的所述通孔的直径小于所述密封圈的暴露端直径，大于所述密封圈的插入端直径，所述密封圈插入所述通孔为间隙配合。
  4. 根据权利要求3所述的一种密封圈密封性能粗检漏用测试装置，其特征在于：所述通孔的深度大于所述密封圈的工作面厚度。
  5. 根据权利要求4所述的一种密封圈密封性能粗检漏用测试装置，其特征在于：所述密封圈配合插入物插入所述密封圈，使所述密封圈的工作面产生压缩，从而产生密封效果。
  6. 根据权利要求5所述的一种密封圈密封性能粗检漏用测试装置，其特征在于：所述密封圈配合插入物为标准堵头或电极。
  7. 根据权利要求1所述的一种密封圈密封性能粗检漏用测试装置，其特征在于：所述下端部的所述安装孔为螺纹孔。
  8. 根据权利要求1所述的一种密封圈密封性能粗检漏用测试装置，其特征在于：所述外壳和顶盖的材质为不锈钢。
  9. 根据权利要求1所述的一种密封圈密封性能粗检漏用测试装置，其特征在于：所述外壳外形为直径不超过40mm的圆柱形，内腔体积在15mL以下，能够承受至少2个标准大气压。
  10. 使用权利要求1-9任一项所述的一种密封圈密封性能粗检漏用测试装置进行检测的方法，其特征在于：
    将所述密封圈插入所述顶盖的通孔中，在接缝处周围涂布密封用液态硅橡胶，使所述密封圈密封固定在所述顶盖上；
    在所述密封圈中插入所述密封圈配合插入物，所述气体快插接头接入气管，充入干燥洁净的空气到一个大气压；
    将所述测试装置头部斜向下45°角没入装有透明液体的透明容器中，控制所述密封圈顶部位于液面以下10cm-15cm；
    观察所述密封圈和所述配合插入物接缝处是否有气泡生成。
PCT/CN2020/141950 2020-06-23 2020-12-31 一种密封圈密封性能粗检漏用测试装置及方法 WO2021258710A1 (zh)

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