WO2017075897A1 - 一种负压气密测试装置及方法 - Google Patents

一种负压气密测试装置及方法 Download PDF

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Publication number
WO2017075897A1
WO2017075897A1 PCT/CN2015/099889 CN2015099889W WO2017075897A1 WO 2017075897 A1 WO2017075897 A1 WO 2017075897A1 CN 2015099889 W CN2015099889 W CN 2015099889W WO 2017075897 A1 WO2017075897 A1 WO 2017075897A1
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Prior art keywords
negative pressure
pressure
way valve
pipe
airtight test
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English (en)
French (fr)
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李小垣
秦利军
冀海俊
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Guangzhou Shipyard International Co Ltd
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Guangzhou Shipyard International Co Ltd
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Priority to EP15907738.7A priority Critical patent/EP3372974A4/en
Publication of WO2017075897A1 publication Critical patent/WO2017075897A1/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
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators

Definitions

  • the invention relates to the technical field of airtight testing, and in particular to a negative pressure airtight testing device and method.
  • the airtight test is carried out in the steel compartment or the dense place.
  • the airtight test of the whole compartment is usually carried out, the workload is large, and the test time is long.
  • the current airtight test is mostly completed in the laboratory, Large cabins or tight spaces are not easy to handle, so airtight testing for large or dense spaces is time consuming and labor intensive.
  • the test box used in the prior art has a complicated structure, a tedious test work, and a long test time.
  • the object of the present invention is to provide a negative pressure airtight test device which is simple in structure, easy to move, and can be used for on-site detection, and has less time for airtight testing.
  • Another object of the present invention is to provide a negative pressure airtightness test method which is tested by the above-described negative pressure airtight test device, which is simple, practical and less time consuming.
  • the embodiment of the present invention adopts the following technical solutions:
  • a negative pressure airtight testing device includes a sealing cover, and a sealing member is disposed on an edge of the sealing cover, the sealing member is configured to be engaged with the object to be tested to make the sealing cover and the Forming a chamber between the objects to be tested;
  • the negative pressure airtight test device further includes a negative pressure forming piping system, and the negative pressure forming piping system a three-way valve and an intake pipe, an air outlet pipe and a connecting pipe respectively connected to the three-way valve;
  • the connecting pipe is disposed on the sealing casing and communicates with the cabin, and the connecting pipe is provided with a single a valve that allows gas in the chamber to enter the three-way valve through the one-way valve;
  • the intake pipe is in communication with the compressed gas, and the outlet pipe is for discharging a three-way valve and an intake pipe And a gas in the air outlet;
  • the negative pressure airtight test device further includes a pressure display device for displaying real-time pressure in the cabin.
  • the sealed casing may include a bottom plate and a cylindrical body, the bottom plate is disposed at one end of the cylindrical body, and the other end of the cylindrical body is provided with a sealing member.
  • the seal may be an oil resistant rubber.
  • the connecting tube may be disposed on the bottom plate.
  • the connecting tube is detachably connected to the bottom plate.
  • the connecting pipe and the bottom plate may be connected by a screw.
  • the pressure display device may be disposed on the connecting tube.
  • a negative pressure airtight test method using the above-described negative pressure airtight test device comprising the steps of: turning on the intake pipe to a compressed gas, and opening the three-way valve to make the intake pipe and the outlet
  • the air pipe is connected; the pressure in the chamber is measured by the pressure display device, and when the pressure value in the chamber is the same as the pressure of the compressed gas that is introduced, the three-way valve is closed, so that the air outlet is no longer Venting; standing for 10-40 min, monitoring the change in reading of the pressure display device.
  • the negative pressure airtightness testing device comprises a sealing cover forming a compartment with the object to be tested, and the sealing part between the casing and the object to be tested is sealed by a sealing member, and the connecting portion between the sealing casing and the object to be tested is connected.
  • the airtightness further includes a negative pressure forming piping system through which the cabin forms a negative pressure.
  • the piping system includes a three-way valve and a three-way valve connecting the intake pipe, the outlet pipe and the connecting pipe.
  • the connecting pipe connects the three-way valve and the sealing cover, and communicates with the cabin, and the compressed gas belt that is introduced through the intake pipe enters the air in the air pipe, the air outlet pipe and the three-way valve, so that the gas in the cabin is in the single pipe of the connecting pipe Under the action of the valve, it enters the three-way valve, and the continuous introduction and outflow of the compressed gas causes a negative pressure to be formed in the cabin, and then the pressure of the cabin is detected by the pressure display device, and the airtightness of the cabin is also detected, and the same can be obtained.
  • the airtightness of the object; the device is simple in structure, easy to move, and can be used for on-site airtight testing.
  • the negative pressure airtight test method proposed by the embodiment of the present invention uses a negative pressure airtight test device for testing,
  • the three-way valve controls the on and off of the compressed gas, and the compressed air removes the air in the three-way valve to form a negative pressure in the chamber.
  • the access is stopped.
  • the gas is compressed, allowed to stand, and the change of the display of the pressure display device is monitored to determine the airtightness of the object to be tested.
  • the method is simple, practical, and less time consuming.
  • FIG. 1 is a schematic structural view of a negative pressure airtight test device according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a sealing cover A-A surface according to an embodiment of the present invention.
  • an embodiment of the present invention provides a negative pressure airtight testing device, including a sealing cover 1 , and a sealing member 2 is disposed on an edge of the sealing cover 1 , and the sealing member 2 is used for bonding with the object to be tested.
  • a compartment is formed between the sealed casing 1 and the object to be tested.
  • the seal 2 can be a sealing gasket.
  • the sealing member 2 may be oil-resistant rubber and has good sealing performance.
  • the negative pressure airtight test apparatus further includes a negative pressure forming piping system 3 including a three-way valve 31 and an intake pipe 32, an air outlet pipe 33, and a connecting pipe 34 connected to the three-way valve 31, respectively.
  • a connecting pipe 34 is provided on the sealed casing 1 and communicates with the cabin.
  • the connecting pipe 34 is provided with a check valve 35 so that the gas in the compartment can enter the three-way valve 31 through the one-way valve 35, and the gas in the intake pipe 32 and the air outlet pipe 33 is prevented from entering the cabin.
  • the intake pipe 32 communicates with the compressed gas, and the gas outlet pipe 33 discharges the gas in the three-way valve 31, the intake pipe 32, and the outlet pipe 33.
  • the negative pressure airtight test device also includes a pressure display device 4 for displaying real-time pressure within the cabin.
  • the pressure display device 4 may be a pressure gauge.
  • the intake pipe 32 of the negative pressure airtight test device is supplied with compressed gas, and the compressed gas is discharged through the air outlet pipe 33, and the original air in the three-way valve 31 is taken away while the compressed gas is exhausted, so that the air in the cabin is exhausted.
  • the body enters the three-way valve 31, and as the compressed gas is continuously discharged, the gas in the cabin is continuously taken away by the compressed gas, thereby forming a negative pressure in the cabin, and the airtight test is performed through the reading of the pressure gauge to achieve the purpose of detection, and the structure Simple, easy to operate, and less time for testing.
  • the sealed casing 1 includes a bottom plate 11 and a cylindrical body 12, and a bottom plate 11 is provided at one end of the cylindrical body 12, and the other end of the cylindrical body 12 is provided with a sealing member 2.
  • the bottom plate 11 and the cylindrical body 12 of the sealed casing 1 are of a split structure, which can be assembled and disassembled. After the separation, the negative pressure airtight test device is convenient for replacing the test position, and is not limited to airtight testing at the location of the device, and is flexible. Sex.
  • the connecting tube 34 is disposed on the bottom plate 11, and the connecting tube 34 is detachably connected with the bottom plate 11, which also makes the negative pressure airtight testing device flexible.
  • the connection between the connecting tube 34 and the bottom plate 11 can be screwed, the connection mode is simple, no additional connecting device is needed, and the structure is simple and the assembly is convenient.
  • the pressure display device 4 is disposed on the connecting pipe 34, and the specific position of the pressure display device 4 is not limited, and the pressure value of the cabin can be detected, the installation is convenient, and the reading can be easily monitored.
  • Embodiments of the present invention provide a test method for a negative pressure airtight test device, including the following steps:
  • the intake pipe 32 is turned on to the compressed gas, and the three-way valve 31 is opened, so that the intake pipe 32 and the outlet pipe 33 are communicated; the pressure in the cabin is measured by the pressure display device 4, and the pressure value in the cabin and the compressed gas are introduced.
  • the three-way valve 31 is closed, so that the air outlet pipe 33 is no longer exhausted, and the intake pipe 32 is no longer in intake; for a period of time t, the value of t is 10-40 min, for example, 15 min, 20 min, 25 min, 30 min.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

一种负压气密测试装置及方法，涉及气密测试技术领域。负压气密测试装置包括密封罩壳(1)，密封罩壳(1)的边缘上设有密封件(2)，密封件(2)用于与待测物贴合使密封罩壳(1)和待测物之间形成舱室，该装置还包括负压形成管路系统(3)，负压形成管路系统(3)包括三通阀(31)以及与三通阀(31)分别连接的进气管(32)、出气管(33)和连接管(34)，连接管(34)设在密封罩壳(1)上并与舱室连通，连接管(34)上设有单向阀(35)，进气管(32)与压缩气体连通，出气管(33)用于排出三通阀(31)、进气管(32)及出气管(33)内的气体；装置还包括压力显示装置(4)，用于显示舱室内的实时压力。还提供利用上述装置进行气密测试方法。该负压气密测试装置及方法，能够在现场检测气密性，装置及测试方法简单、实用、用时较少。

Description

一种负压气密测试装置及方法
本专利申请要求于2015年11月06日提交的，申请号为201510758205.0，申请人为广船国际有限公司，发明名称为“一种负压气密测试装置及方法”的中国专利申请的优先权，该申请的全文以引用的方式并入本申请中。
技术领域
本发明涉及气密测试技术领域，尤其涉及一种负压气密测试装置及方法。
背景技术
船舶制造时，钢制舱室或密性场所要进行气密测试，通常要对整个舱室进行气密测试，工作量大，测试时间长；另外，由于目前的气密测试多在实验室才能完成，而大型舱室或密性场所不便于搬运，因此，针对大型舱室或密性场所的气密测试费时费力。现有技术用的测试箱结构复杂、测试工作繁琐，测试用时长。
针对以上问题，需要一种能够在工作现场进行气密测试的装置及方法，简化装置结构，减少大型气密场所的测试工作量和测试用时。
发明内容
本发明的目的在于提出一种负压气密测试装置，该装置结构简单，便于移动，可用于现场检测，气密测试用时少。
本发明的另一个目的在于提出一种负压气密测试方法，利用上述负压气密测试装置进行测试，该方法简便、实用、用时少。
为达此目的，本发明实施例采用以下技术方案：
一种负压气密测试装置，包括密封罩壳，所述密封罩壳的边缘上设有密封件，所述密封件用于与所述待测物贴合使所述密封罩壳和所述待测物之间形成舱室；该负压气密测试装置还包括负压形成管路系统，所述负压形成管路系统 包括三通阀以及与所述三通阀分别连接的进气管、出气管和连接管；所述连接管设在所述密封罩壳上并与所述舱室连通，所述连接管上设有单向阀，使得所述舱室内的气体能够通过所述单向阀进入到所述三通阀中；所述进气管与所述压缩气体连通，所述出气管用于排出三通阀、进气管及出气管内的气体；所述负压气密测试装置还包括压力显示装置，用于显示舱室内的实时压力。
所述密封罩壳可以包括底板和筒体，所述底板设在所述筒体的一端，所述筒体的另一端设有密封件。
所述密封件可以为耐油橡胶。
所述连接管可设在所述底板上。
所述连接管与所述底板之间可拆卸连接。
所述连接管和所述底板之间可以通过螺纹连接。
所述压力显示装置可以设在所述连接管上。
一种采用上述的负压气密测试装置的负压气密测试方法，包括以下步骤：使所述进气管接通压缩气体，并打开所述三通阀，使得所述进气管和所述出气管连通；通过所述压力显示装置测量所述舱室内的压力，当所述舱室内的压力值与通入的压缩气体的压力相同时，关闭所述三通阀，使得所述出气管不再出气；静置10-40min，监测所述压力显示装置的读数变化。
本发明的有益效果：
本发明实施例提出的负压气密测试装置，包括与待测物形成舱室的密封罩壳，罩壳与待测物之间通过密封件密封，密封罩壳与待测物之间的连接部分的气密性，还包括负压形成管路系统，通过该管路系统使舱室形成负压，具体地，该管路系统包括三通阀以及三通阀连接的进气管、出气管和连接管，连接管连接三通阀和密封罩壳，并与舱室连通，通过进气管通入的压缩气体带走进气管、出气管和三通阀内的空气，使得舱室内的气体在连接管的单向阀的作用下进入到三通阀内，压缩气体的不断通入和流出使得舱室内形成负压，然后通过压力显示装置对舱室内的压力进行检测舱室的气密性，同样能得到待测物的气密性；该装置结构简单，便于移动，可用于现场气密测试。
本发明实施例提出的负压气密测试方法，利用负压气密测试装置进行测试， 通过三通阀控制压缩气体的通断，通过压缩气体带走三通阀内的空气，使得舱室内形成负压，当舱室内的压力值与通入的压缩气体的压力相同时，停止通入压缩气体，静置，监测压力显示装置的示数变化，进而判断待测物的气密性，该方法简单、实用、用时较少。
附图说明
图1是本发明实施例提供的负压气密测试装置的结构示意图；
图2是本发明实施例提供的密封罩壳A-A面的结构示意图。
其中，1、密封罩壳；11、底板；12、筒体；2、密封件；3、负压形成管路系统；31、三通阀；32、进气管；33、出气管；34、连接管；35、单向阀；4、压力显示装置。
具体实施方式
下面结合附图并通过具体实施方式来进一步说明本发明的技术方案。
如图1所示，本发明实施例提供一种负压气密测试装置，包括密封罩壳1，密封罩壳1的边缘上设有密封件2，密封件2用于与待测物贴合使密封罩壳1和待测物之间形成舱室。该密封件2可以为具有密封作用的密封垫。优选地，该密封件2可以为耐油橡胶，密封性能好。该负压气密测试装置还包括负压形成管路系统3，负压形成管路系统3包括三通阀31以及与三通阀31分别连接的进气管32、出气管33和连接管34。连接管34设在密封罩壳1上并与舱室连通。连接管34上设有单向阀35，使得舱室内的气体能够通过单向阀35进入到三通阀31中，并且防止进气管32和出气管33中的气体进入到舱室内。进气管32与压缩气体连通，出气管33排出三通阀31、进气管32及出气管33内的气体。负压气密测试装置还包括压力显示装置4，用于显示舱室内的实时压力。具体的，压力显示装置4可以为压力表。
该负压气密测试装置的进气管32通入压缩气体，压缩气体通过出气管33排出，在压缩气体排出的同时将三通阀31中原有的空气带走，使得舱室内的气 体进入到三通阀31，随着压缩气体的不断排出，舱室内的气体不断被压缩气体带走，进而使舱室内形成负压，通过压力表的读数进行气密测试，达到检测目的，结构简单，操作方便，检测用时少。
如图2所示，密封罩壳1包括底板11和筒体12，底板11设在筒体12的一端，筒体12的另一端设有密封件2。密封罩壳1的底板11和筒体12为分体式结构，可以进行拼装和分拆，分拆后该负压气密测试装置便于更换测试位置，不限于在装置所在地进行气密测试，具有灵活性。
连接管34设在底板11上，连接管34与底板11之间可拆卸连接，同样使该负压气密测试装置具有灵活性的特点。优选地，连接管34和底板11之间可以通过螺纹连接，连接方式简单，无需额外增加连接装置，结构简单、装配方便。
压力显示装置4设在连接管34上，压力显示装置4的具体位置不限，能够检测舱室的压力值、便于安装、便于监测读数即可。
本发明实施例提供一种负压气密测试装置的测试方法，包括以下步骤：
使进气管32接通压缩气体，并打开三通阀31，使得进气管32和出气管33连通；通过压力显示装置4测量舱室内的压力，当舱室内的压力值与通入的压缩气体的压力相同时，关闭三通阀31，使得出气管33不再出气，进气管32不再进气；静置一段时间t，t的取值为10-40min，例如，15min，20min，25min，30min，35min等，静置过程中监测压力显示装置4的读数变化，当压力显示装置4的读数不变时，可以确定舱室的气密性良好，即待测物的气密性良好，当压力显示装置4的读数增加时，相应的待测物的气密性差，不符合气密性要求。
显然，本发明的上述实施例仅是为了清楚说明本发明所作的举例，而并非是对本发明的实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明权利要求的保护范围之内。

Claims (8)

  1. 一种负压气密测试装置，其特征在于，包括密封罩壳(1)，所述密封罩壳(1)的边缘上设有密封件(2)，所述密封件(2)用于与所述待测物贴合使所述密封罩壳(1)和所述待测物之间形成舱室；该负压气密测试装置还包括负压形成管路系统(3)，所述负压形成管路系统(3)包括三通阀(31)以及与所述三通阀(31)分别连接的进气管(32)、出气管(33)和连接管(34)；所述连接管(34)设在所述密封罩壳(1)上并与所述舱室连通，所述连接管(34)上设有单向阀(35)，使得所述舱室内的气体能够通过所述单向阀(35)进入到所述三通阀(31)中；所述进气管(32)与所述压缩气体连通，所述出气管(33)用于排出三通阀(31)、进气管(32)及出气管(33)内的气体；所述负压气密测试装置还包括压力显示装置(4)，用于显示舱室内的实时压力。
  2. 根据权利要求1所述的负压气密测试装置，其特征在于，所述密封罩壳(1)包括底板(11)和筒体(12)，所述底板(11)设在所述筒体(12)的一端，所述筒体(12)的另一端设有密封件(2)。
  3. 根据权利要求1所述的负压气密测试装置，其特征在于，所述密封件(2)为耐油橡胶。
  4. 根据权利要求2所述的负压气密测试装置，其特征在于，所述连接管(34)设在所述底板(11)上。
  5. 根据权利要求4所述的负压气密测试装置，其特征在于，所述连接管(34)与所述底板(11)之间可拆卸连接。
  6. 根据权利要求5所述的负压气密测试装置，其特征在于，所述连接管(34)和所述底板(11)之间通过螺纹连接。
  7. 根据权利要求1-6任一所述的负压气密测试装置，其特征在于，所述压力显示装置(4)设在所述连接管(34)上。
  8. 一种采用根据权利要求1-7任一所述的负压气密测试装置的负压气密测试方法，其特征在于，包括以下步骤：使所述进气管(32)接通压缩气体，并打开所述三通阀(31)，使得所述进气管(32)和所述出气管(33)连通；通过所述压力显示装置(4)测量所述舱室内的压力，当所述舱室内的压力值与通入的压缩气体的压力相同时，关闭所述三通阀(31)，使得所述出气管(33)不再 出气，所述进气管(32)不再进气；静置10-40min，监测所述压力显示装置(4)的读数变化。
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