CN105423018A - Leakage detecting device of high-temperature flange connecting system - Google Patents
Leakage detecting device of high-temperature flange connecting system Download PDFInfo
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- 238000001514 detection method Methods 0.000 claims abstract description 57
- 238000007789 sealing Methods 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims description 42
- 238000001816 cooling Methods 0.000 claims description 25
- 238000001035 drying Methods 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 239000001307 helium Substances 0.000 claims description 7
- 229910052734 helium Inorganic materials 0.000 claims description 7
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/006—Attachments
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Abstract
本发明涉及一种高温法兰连接系统的测漏装置，包括两个测漏管道、第一法兰、第二法兰和垫片形成的密封腔，密封腔内设有加热机构，加压机构向密封腔输送气体：第一法兰和第二法兰的外侧套有环形的刚性件，刚性件内侧设有两处环形凹槽，环形凹槽内均设有密封圈，两个密封圈分别与第一法兰和第二法兰的侧面紧密接触，刚性件上设有若干对绕测漏管道均匀分布的螺纹通孔，每对螺纹通孔均关于垫片对称，每个螺纹通孔上都设有一个螺栓，每对螺栓分别将第一法兰和第二法兰配合顶紧，垫片、第一法兰、第二法兰、密封圈和刚性件围成密封的测漏腔，测漏腔通过管道与质谱检测仪连接。该装置设置的测漏腔不会影响垫片的正常受力、测试结果更加真实。
The invention relates to a leak detection device of a high temperature flange connection system, which comprises a sealed chamber formed by two leak detection pipes, a first flange, a second flange and a gasket, a heating mechanism and a pressurizing mechanism are arranged in the sealed chamber Gas delivery to the sealing chamber: the outer side of the first flange and the second flange is covered with a ring-shaped rigid part, and the inner side of the rigid part is provided with two annular grooves, and there are sealing rings in the annular grooves, and the two sealing rings are respectively In close contact with the sides of the first flange and the second flange, several pairs of threaded through holes evenly distributed around the leak detection pipeline are arranged on the rigid part, each pair of threaded through holes is symmetrical about the gasket, and each threaded through hole There is a bolt, and each pair of bolts respectively tightens the first flange and the second flange, and the gasket, the first flange, the second flange, the sealing ring and the rigid parts form a sealed leak detection chamber. The leak detection chamber is connected with the mass spectrometer through a pipeline. The leak detection chamber provided by the device will not affect the normal stress of the gasket, and the test result is more realistic.
Description
技术领域 technical field
本发明涉及一种高温法兰连接系统的测漏装置。 The invention relates to a leak detection device of a high temperature flange connection system.
背景技术 Background technique
法兰连接广泛的应用于石油、化工、航天航空等各行各业中，法兰连接是压力容器和管道设备中常见的连接方式。由于法兰连接系统长期工作在高温高压的工作环境下，对于最常见的螺栓法兰而言，法兰容易发生螺栓伸长、法兰翘曲、垫片变形、法兰偏转等问题，而这些问题都会使螺栓法兰连接系统在一定程度上产生泄漏，若系统产生泄漏则很有可能造成经济损失和安全事故。 Flange connections are widely used in petroleum, chemical, aerospace and other industries. Flange connections are common connection methods in pressure vessels and pipeline equipment. Since the flange connection system works in a high temperature and high pressure working environment for a long time, for the most common bolted flanges, the flange is prone to problems such as bolt elongation, flange warping, gasket deformation, and flange deflection. Any problem will cause the bolted flange connection system to leak to a certain extent. If the system leaks, it is likely to cause economic losses and safety accidents.
为了提高法兰连接系统的紧密性，需要得到法兰连接系统在高温高压下的泄漏率数据，人们设计了专门的装置测试高温法兰连接系统的泄漏率。但是现有的测漏装置只能测试螺栓法兰连接系统的泄露率，对于非螺栓连接的形式不能进行测试，而且现有的测漏装置还存在以下问题：现有的测漏装置采用两种方法得到泄露率，一种是通过向密闭管道补充气体维持密闭管道的压力，补充量即为泄露量，这种方法操作难度大，设备成本高，另一种是人工制作一个与密闭管道连通的测漏腔，收集到的测漏腔中气体即为泄露量，这种方法操作简单，成本低，但是测漏腔的制作一般是在垫片的径向外侧左法兰和右法兰之间设置圆筒，圆筒、左法兰、右法兰和垫片围成封闭的测漏腔，这种测漏腔影响了垫片的正常受力，因为圆筒在垫片的径向外侧承担了一部分受力，因此测得的不是垫片正常受力情况下的泄露率，具有一定偏差，而且圆筒使得法兰沿圆环均匀受力，并不是螺栓连接的非均匀受力，并不能模拟正常的受力现象。 In order to improve the tightness of the flange connection system, it is necessary to obtain the leakage rate data of the flange connection system under high temperature and high pressure. People have designed a special device to test the leakage rate of the high temperature flange connection system. However, the existing leak detection device can only test the leakage rate of the bolted flange connection system, and cannot test the non-bolted connection, and the existing leak detection device also has the following problems: the existing leak detection device uses two One way is to maintain the pressure of the closed pipeline by adding gas to the closed pipeline, and the supplementary amount is the leakage amount. This method is difficult to operate and the cost of equipment is high. The other is to manually make a gas that communicates with the closed pipeline Leak detection chamber, the collected gas in the leakage detection chamber is the leakage amount. This method is simple to operate and low in cost, but the production of the leak detection chamber is generally between the left and right flanges on the radially outer side of the gasket Set the cylinder, the cylinder, the left flange, the right flange and the gasket to form a closed leak detection cavity, which affects the normal stress of the gasket, because the cylinder bears the load on the radial outside of the gasket. part of the force, so the measured leakage rate is not the normal force of the gasket, there is a certain deviation, and the cylinder makes the flange evenly force along the ring, not the non-uniform force of the bolt connection, and it cannot Simulate normal stress phenomena.
发明内容 Contents of the invention
本发明的目的是提供一种高温法兰连接系统的测漏装置，该装置设置的测漏腔不会影响垫片的正常受力、测试结果更加真实。 The object of the present invention is to provide a leak testing device for a high temperature flange connection system, the leak testing chamber provided in the device will not affect the normal stress of the gasket, and the test result is more real.
本发明所采用的技术方案是： The technical scheme adopted in the present invention is:
一种高温法兰连接系统的测漏装置，包括两个测漏管道、将测漏两个管道连接的第一法兰和第二法兰、设在第一法兰和第二法兰密封面之间的垫片、加热机构、加压机构，两个测漏管道的非连接端均封闭并在内部形成密封腔，加热机构设在密封腔内，加压机构向密封腔输送气体；第一法兰和第二法兰的外侧套有环形的刚性件，刚性件内侧设有两处环形凹槽，环形凹槽内均设有密封圈，两个密封圈分别与第一法兰和第二法兰的侧面紧密接触，刚性件上设有若干对绕测漏管道均匀分布的螺纹通孔，每对螺纹通孔均关于垫片对称，每个螺纹通孔上都设有一个螺栓，每对螺栓分别将第一法兰和第二法兰配合顶紧，垫片、第一法兰、第二法兰、密封圈和刚性件围成密封的测漏腔，测漏腔通过管道与质谱检测仪连接。 A leak detection device for a high-temperature flange connection system, comprising two leak detection pipes, a first flange and a second flange connecting the two leak detection pipes, and a sealing surface of the first flange and the second flange The gasket, heating mechanism, and pressurizing mechanism between the two leak detection pipes are closed and form a sealed cavity inside, the heating mechanism is set in the sealed cavity, and the pressurized mechanism delivers gas to the sealed cavity; the first The outer side of the flange and the second flange is covered with an annular rigid part, and the inner side of the rigid part is provided with two annular grooves, and a sealing ring is provided in the annular groove, and the two sealing rings are connected with the first flange and the second flange respectively. The sides of the flange are in close contact, and the rigid member is provided with several pairs of threaded through holes evenly distributed around the leak detection pipeline. Each pair of threaded through holes is symmetrical about the gasket, and each threaded through hole is provided with a bolt. Bolts respectively tighten the first flange and the second flange, and the gasket, the first flange, the second flange, the sealing ring and the rigid parts form a sealed leak detection chamber, and the leak detection chamber is detected by the pipeline and mass spectrometer instrument connection.
进一步地，第一法兰和第二法兰与螺栓接触处均设有定位凹槽，螺栓位于定位凹槽内。 Further, positioning grooves are provided at the places where the first flange and the second flange are in contact with the bolts, and the bolts are located in the positioning grooves.
进一步地，第一法兰或第二法兰环向上均匀分布有应变片，应变片依次与动态应变仪和计算机连接。 Further, strain gauges are uniformly distributed upwards on the first flange or the second flange ring, and the strain gauges are sequentially connected to the dynamic strain gauge and the computer.
进一步地，测漏腔与质谱检测仪连接的管道上从测漏腔的一端起依次设有缓冲室、降温室和干燥室，缓冲室上设有压力表，降温室上设有温度表，测漏腔与缓冲室之间、降温室与干燥室之间、干燥室与质谱检测仪之间均设有阀门，缓冲室与降温室之间设有调压阀。 Further, the pipeline connecting the leak detection chamber and the mass spectrometer detector is provided with a buffer chamber, a cooling chamber and a drying chamber sequentially from one end of the leak detection chamber. The buffer chamber is provided with a pressure gauge, and the cooling chamber is provided with a temperature gauge. Valves are provided between the leak chamber and the buffer chamber, between the cooling chamber and the drying chamber, between the drying chamber and the mass spectrometer, and a pressure regulating valve is provided between the buffer chamber and the cooling chamber.
进一步地，垫片为柔性石墨复合垫片。 Further, the gasket is a flexible graphite composite gasket.
进一步地，密封圈为O型圈。 Further, the sealing ring is an O-ring.
进一步地，第一法兰和第二法兰上分别设有热电偶，热电偶的探测端位于密封腔内、输送端与计算机连接。 Further, thermocouples are respectively arranged on the first flange and the second flange, the detection end of the thermocouple is located in the sealed cavity, and the delivery end of the thermocouple is connected to the computer.
进一步地，加压机构包括储气罐，储气罐通过管道与密封腔连通，连通储气罐与密封腔的管道上从储气罐一端起依次设有调压阀、压力表和阀门。 Further, the pressurizing mechanism includes an air storage tank, which communicates with the sealed cavity through a pipeline, and the pipeline connecting the gas storage tank and the sealed cavity is provided with a pressure regulating valve, a pressure gauge and a valve sequentially from one end of the gas storage tank.
进一步地，储气罐内的气体为氦气，质谱检漏仪为氦质谱检漏仪。 Further, the gas in the gas storage tank is helium, and the mass spectrometer leak detector is a helium mass spectrometer leak detector.
进一步地，加热机构包括加热电阻，加热电阻与位于密封腔外部的温度控制箱连接。 Further, the heating mechanism includes a heating resistor connected to a temperature control box located outside the sealed cavity.
本发明的有益效果是： The beneficial effects of the present invention are:
1.本发明的原理是通过加压机构向密封腔输送压力气体，再通过收集泄漏腔的气体得到泄漏量从而得出泄漏率，其中，泄漏腔由垫片、第一法兰、第二法兰、密封圈和刚性件围成，密封圈位于第一法兰和第二法兰的非密封面上对垫片的受力没有丝毫影响，刚性件和螺栓只是起到压紧的作用（与螺栓法兰连接相同），测试结果更加真实。 1. The principle of the present invention is to deliver pressure gas to the sealing cavity through the pressurization mechanism, and then obtain the leakage rate by collecting the gas in the leakage cavity, wherein the leakage cavity is composed of a gasket, a first flange, and a second method. The sealing ring is located on the non-sealing surface of the first flange and the second flange and has no effect on the force of the gasket, and the rigid parts and bolts only play a role of compression (with bolted flange connection), the test results are more realistic.
2.定位凹槽除了给螺栓定位之外还起到了防止偏转过大的作用，效果与常规的螺栓法兰连接相同。 2. In addition to positioning the bolts, the positioning groove also plays a role in preventing excessive deflection, and the effect is the same as that of a conventional bolted flange connection.
3.通过计算机和动态应变仪来显示第一法兰或第二法兰应变的大小，通过法兰环向应变与法兰转角的关系导出在此过程中法兰的偏转角，结构简单，成本低，便于统计和分析偏转角和泄漏率的关系。 3. Use the computer and dynamic strain gauge to display the strain of the first flange or the second flange, and derive the deflection angle of the flange in the process through the relationship between the ring strain of the flange and the flange rotation angle. The structure is simple and the cost is low. Low, which is convenient for statistics and analysis of the relationship between deflection angle and leakage rate.
4.现有的测漏装置中，从测漏腔内收集到的气体经降温后直接通入质谱检测仪进行计量，计量结果不够精确，本发明添加缓冲室，起到稳定气流调节气压的作用，降温室用于降温，降温后增加的湿度由干燥室进行处理，最终到达质谱检测仪，计量精度更高。 4. In the existing leak detection device, the gas collected from the leak detection chamber is directly passed into the mass spectrometer for measurement after cooling down, and the measurement result is not accurate enough. The present invention adds a buffer chamber to stabilize the air flow and adjust the air pressure. , the cooling room is used to cool down, and the increased humidity after cooling is processed by the drying room, and finally reaches the mass spectrometer, with higher measurement accuracy.
5.柔性石墨复合垫片具有良好的防腐蚀性，耐高/低温，良好的压缩回弹性和高强度性，是压力容器或管道中较常用的垫片，用于测试泄漏率，符合具体实际。 5. Flexible graphite composite gasket has good corrosion resistance, high/low temperature resistance, good compression resilience and high strength. It is a more commonly used gasket in pressure vessels or pipelines. It is used to test the leakage rate and conforms to the actual situation. .
6.O型圈安装拆卸方便，能在静止和各种运动条件下使用，运动阻力小，富有弹性，密封性能好。 6. The O-ring is easy to install and disassemble, and can be used under static and various motion conditions, with small motion resistance, high elasticity, and good sealing performance.
附图说明 Description of drawings
图1是本发明实施例的机构示意图（图中虚线表示连接至计算机的线路）。 Figure 1 is a schematic diagram of the mechanism of the embodiment of the present invention (the dotted line in the figure indicates the circuit connected to the computer).
图2是本发明实施例中应变片在第一法兰上的安装示意图（图中虚线表示连接至计算机的线路）。 Fig. 2 is a schematic diagram of the installation of the strain gauge on the first flange in the embodiment of the present invention (the dotted line in the figure indicates the circuit connected to the computer).
图中：1-保温套；2-测漏管道；3-加热电阻；4-垫圈；5-螺栓；6-刚性件；7-密封圈；8-应变片；9-第一法兰；10-垫片；11-第二法兰；12-热电偶；13-阀门；14-温度控制箱；15-动态应变仪；16-压力表；17-调压阀；18-计算机；19-缓冲室；20-储气罐；21-泄压阀；22-温度表；23-降温室；24-干燥室；25-质谱检测仪；26-盲板。 In the figure: 1-insulation sleeve; 2-leakage detection pipe; 3-heating resistance; 4-washer; 5-bolt; 6-rigid part; 7-sealing ring; 8-strain gauge; -gasket; 11-second flange; 12-thermocouple; 13-valve; 14-temperature control box; 15-dynamic strain gauge; 16-pressure gauge; 17-pressure regulating valve; 18-computer; 19-buffer 20-air storage tank; 21-pressure relief valve; 22-temperature gauge; 23-cooling room; 24-drying room; 25-mass spectrometer; 26-blind plate.
具体实施方式 detailed description
下面结合附图和实施例对本发明作进一步的说明。 The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
如图1所示，一种高温法兰连接系统的测漏装置，包括两个测漏管道2、将两个测漏管道2连接的第一法兰9和第二法兰11、设在第一法兰9和第二法兰11密封面之间的垫片10、加热机构、加压机构，两个测漏管道2的非连接端均（通过盲板26）封闭并在内部形成密封腔，加热机构设在密封腔内，加压机构向密封腔输送气体；第一法兰9和第二法兰11的外侧套有环形的刚性件6，刚性件6内侧设有两处环形凹槽，环形凹槽内均设有密封圈7，两个密封圈7分别与第一法兰9和第二法兰11的侧面紧密接触，刚性件6上设有若干对绕测漏管道2均匀分布的螺纹通孔，每对螺纹通孔均关于垫片10对称，每个螺纹通孔上都设有一个螺栓5（螺栓5与刚性件6之间设有垫圈4），每对螺栓5分别将第一法兰9和第二法兰11配合顶紧，垫片10、第一法兰9、第二法兰11、密封圈7和刚性件6围成密封的测漏腔，测漏腔通过管道与质谱检测仪25连接。 As shown in Figure 1, a leak detection device for a high-temperature flange connection system includes two leak detection pipelines 2, a first flange 9 and a second flange 11 connecting the two leak detection pipelines 2, and the The gasket 10 between the sealing surfaces of the first flange 9 and the second flange 11, the heating mechanism, the pressurizing mechanism, the non-connecting ends of the two leak detection pipes 2 are closed (through the blind plate 26) and a sealed cavity is formed inside , the heating mechanism is set in the sealed cavity, and the pressurizing mechanism delivers gas to the sealed cavity; the outer side of the first flange 9 and the second flange 11 are covered with an annular rigid part 6, and the inner side of the rigid part 6 is provided with two annular grooves , the annular grooves are provided with sealing rings 7, and the two sealing rings 7 are in close contact with the sides of the first flange 9 and the second flange 11 respectively, and the rigid member 6 is provided with several pairs of leak detection pipes 2 evenly distributed Each pair of threaded through holes is symmetrical about the gasket 10, and each threaded through hole is provided with a bolt 5 (a washer 4 is provided between the bolt 5 and the rigid part 6), and each pair of bolts 5 respectively The first flange 9 and the second flange 11 are tightly matched, and the gasket 10, the first flange 9, the second flange 11, the sealing ring 7 and the rigid part 6 form a sealed leak detection chamber, and the leak detection chamber passes through The pipeline is connected with the mass spectrometer 25.
本发明的原理是通过加压机构向密封腔输送压力气体，再通过收集泄漏腔的气体得到泄漏量从而得出泄漏率，其中，泄漏腔由垫片10、第一法兰9、第二法兰11、密封圈7和刚性件6围成，密封圈7位于第一法兰9和第二法兰11的非密封面上对垫片10的受力没有丝毫影响，刚性件6和螺栓5只是起到压紧的作用（与螺栓法兰连接相同），测试结果更加真实。 The principle of the present invention is to deliver pressure gas to the sealing cavity through a pressurizing mechanism, and then obtain the leakage rate by collecting the gas in the leakage cavity, wherein the leakage cavity is composed of the gasket 10, the first flange 9, the second method flange 11, sealing ring 7 and rigid part 6, the sealing ring 7 located on the non-sealing surface of the first flange 9 and the second flange 11 has no effect on the force of the gasket 10, the rigid part 6 and the bolt 5 It just plays the role of compression (same as bolted flange connection), and the test results are more realistic.
如图1所示，在本实施例中，第一法兰9和第二法兰11与螺栓5接触处均设有定位凹槽，螺栓5位于定位凹槽内。定位凹槽除了给螺栓5定位之外还起到了防止偏转过大的作用，效果与常规的螺栓5法兰连接相同。 As shown in FIG. 1 , in this embodiment, positioning grooves are provided at the places where the first flange 9 and the second flange 11 are in contact with the bolts 5 , and the bolts 5 are located in the positioning grooves. In addition to positioning the bolt 5, the positioning groove also plays a role in preventing excessive deflection, and the effect is the same as that of the conventional bolt 5 flange connection.
如图1和图2所示，在本实施例中，第一法兰9(或第二法兰11)环向上均匀分布有应变片8，应变片8依次与动态应变仪15和计算机18连接。通过计算机18和动态应变仪15来显示第一法兰9（或第二法兰11）应变的大小，通过法兰环向应变与法兰转角的关系导出在此过程中法兰的偏转角，结构简单，成本低，便于统计和分析偏转角和泄漏率的关系。 As shown in Figures 1 and 2, in this embodiment, the first flange 9 (or the second flange 11) is evenly distributed with strain gauges 8 around the ring, and the strain gauges 8 are connected to the dynamic strain gauge 15 and the computer 18 in turn . The magnitude of the strain of the first flange 9 (or the second flange 11) is displayed by the computer 18 and the dynamic strain gauge 15, and the deflection angle of the flange in this process is derived through the relationship between the flange ring strain and the flange rotation angle, The structure is simple, the cost is low, and the relationship between the deflection angle and the leakage rate is convenient for statistics and analysis.
如图1所示，在本实施例中，测漏腔与质谱检测仪25连接的管道上从测漏腔的一端起依次设有缓冲室19、降温室23和干燥室24，缓冲室19上设有压力表16，降温室23上设有温度表22，测漏腔与缓冲室19之间、降温室23与干燥室24之间、干燥室24与质谱检测仪25之间均设有阀门13，缓冲室19与降温室23之间设有调压阀17。现有的测漏装置中，从测漏腔内收集到的气体经降温后直接通入质谱检测仪25进行计量，计量结果不够精确，本发明添加缓冲室19，起到稳定气流调节气压的作用，降温室23用于降温，降温后增加的湿度由干燥室24进行处理，最终到达质谱检测仪25，计量精度更高。 As shown in Figure 1, in this embodiment, the pipeline connecting the leak detection chamber and the mass spectrometer 25 is sequentially provided with a buffer chamber 19, a cooling chamber 23 and a drying chamber 24 from one end of the leak detection chamber. A pressure gauge 16 is provided, a temperature gauge 22 is provided on the cooling chamber 23, valves are provided between the leak detection chamber and the buffer chamber 19, between the cooling chamber 23 and the drying chamber 24, and between the drying chamber 24 and the mass spectrometry detector 25 13. A pressure regulating valve 17 is provided between the buffer chamber 19 and the cooling chamber 23. In the existing leak detection device, the gas collected from the leak detection chamber is directly passed into the mass spectrometer 25 for measurement after cooling down, and the measurement result is not accurate enough. The present invention adds a buffer chamber 19 to stabilize the air flow and adjust the air pressure. , the cooling room 23 is used for cooling, and the increased humidity after cooling is processed by the drying room 24, and finally reaches the mass spectrometer 25, and the measurement accuracy is higher.
在本实施例中，储气罐20内的气体为氦气，质谱检漏仪为氦质谱检漏仪。采用氦气作为储气罐20内的气体，加热至高温不会产生危险，安全可靠而且便于检测。 In this embodiment, the gas in the gas storage tank 20 is helium, and the mass spectrometer leak detector is a helium mass spectrometer leak detector. Helium is used as the gas in the gas storage tank 20, and heating to a high temperature will not cause danger, is safe, reliable and easy to detect.
在本实施例中，垫片10采用柔性石墨复合垫片10。柔性石墨复合垫片10具有良好的防腐蚀性，耐高/低温，良好的压缩回弹性和高强度性，是压力容器或管道中较常用的垫片10，用于测试泄漏率，符合具体实际。 In this embodiment, the gasket 10 adopts a flexible graphite composite gasket 10 . Flexible graphite composite gasket 10 has good corrosion resistance, high/low temperature resistance, good compression resilience and high strength. It is a more commonly used gasket 10 in pressure vessels or pipelines. It is used to test the leakage rate and conforms to the actual situation. .
在本实施例中，密封圈7采用O型圈。O型圈安装拆卸方便，能在静止和各种运动条件下使用，运动阻力小，富有弹性，密封性能好。 In this embodiment, the sealing ring 7 is an O-ring. The O-ring is easy to install and disassemble, and can be used under static and various motion conditions, with small motion resistance, high elasticity, and good sealing performance.
如图1所示，在本实施例中，第一法兰9和第二法兰11上分别设有热电偶12，热电偶12的探测端位于密封腔内、输送端与计算机18连接。热电偶12用于测量并反馈密封腔内气体的温度。 As shown in FIG. 1 , in this embodiment, thermocouples 12 are respectively provided on the first flange 9 and the second flange 11 . The thermocouple 12 is used to measure and feed back the temperature of the gas in the sealed cavity.
如图1所示，在本实施例中，加压机构包括储气罐20，储气罐20通过管道与密封腔连通（储气罐20上设有压力表16和泄压阀21），连通储气罐20与密封腔的管道上从储气罐20一端起依次设有调压阀17、压力表16和阀门13。管道上的压力表16反映输入密封腔内气体的压力，管道上的调压阀17用于调节输入密封腔内气体的压力，阀门13起到开关作用。 As shown in Figure 1, in this embodiment, the pressurizing mechanism includes an air storage tank 20, which communicates with the sealed cavity through a pipeline (the air storage tank 20 is provided with a pressure gauge 16 and a pressure relief valve 21), and the communication A pressure regulating valve 17 , a pressure gauge 16 and a valve 13 are arranged sequentially from one end of the gas storage tank 20 on the pipeline between the gas storage tank 20 and the sealed chamber. The pressure gauge 16 on the pipeline reflects the pressure of the gas input into the sealed cavity, the pressure regulating valve 17 on the pipeline is used to adjust the pressure of the gas input into the sealed cavity, and the valve 13 acts as a switch.
如图1所示，在本实施例中，加热机构包括加热电阻3，加热电阻3与位于密封腔外部的温度控制箱14连接。 As shown in FIG. 1 , in this embodiment, the heating mechanism includes a heating resistor 3 connected to a temperature control box 14 located outside the sealed cavity.
本发明实施例的工作流程是： The workflow of the embodiment of the present invention is:
1）关闭所有阀门13和调压阀17。 1) Close all valves 13 and pressure regulating valve 17.
2）通过温度控制箱14调节加热电阻3的温度，并通过热电偶12监测密封腔内的温度，当密封腔内温度稳定后，将管道、第一法兰9、第二法兰11、钢性件和热电偶12套在保温套1内。 2) Adjust the temperature of the heating resistor 3 through the temperature control box 14, and monitor the temperature in the sealed cavity through the thermocouple 12. When the temperature in the sealed cavity is stable, put the pipeline, the first flange 9, the second flange 11, the steel Sexual parts and thermocouple 12 are set in the insulation cover 1.
3）打开储气罐20与密封腔之间的阀门13，根据管路上的压力表16调节调压阀17，观察并记录计算机18上法兰环向应变的数据。 3) Open the valve 13 between the gas storage tank 20 and the sealing chamber, adjust the pressure regulating valve 17 according to the pressure gauge 16 on the pipeline, observe and record the data of the circumferential strain of the flange on the computer 18 .
4）打开测漏腔与缓冲室19之间的阀门13，泄漏的气体通过测漏腔进入缓冲室19内，通过压力表16监测缓冲室19内泄漏气体的压力，待气体压力稳定后，调节缓冲室19与降温室23之间的调压阀17，使泄漏气体进入降温室23内降温，通过温度表22监测降温室23内泄漏气体的温度，降温后打开降温室23与干燥室24之间的阀门13，使泄漏气体进入干燥室24内进行干燥，待气体干燥后，打开干燥室24与质谱检测仪25之间的阀门13，泄漏气体进入质谱检测仪25，通过质谱检测仪25来监测泄漏气体的泄漏量，具体的泄漏率通过泄漏量除以充入密封腔内气体的总量确定。 4) Open the valve 13 between the leak detection chamber and the buffer chamber 19, the leaked gas enters the buffer chamber 19 through the leak detection chamber, and monitor the pressure of the leaked gas in the buffer chamber 19 through the pressure gauge 16. After the gas pressure is stabilized, adjust The pressure regulating valve 17 between the buffer chamber 19 and the cooling chamber 23 allows the leakage gas to enter the cooling chamber 23 to cool down, monitor the temperature of the leaked gas in the cooling chamber 23 through the thermometer 22, and open the gap between the cooling chamber 23 and the drying chamber 24 after cooling. Between the valve 13, the leaked gas enters the drying chamber 24 for drying. After the gas is dried, the valve 13 between the drying chamber 24 and the mass spectrometer 25 is opened, and the leaked gas enters the mass spectrometer 25 and passes through the mass spectrometer 25. The leakage rate of the leakage gas is monitored, and the specific leakage rate is determined by dividing the leakage amount by the total amount of gas filled in the sealed cavity.
5）在不同的温度和压力下重复上述实验。 5) Repeat the above experiments at different temperatures and pressures.
应当理解的是，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，而所有这些改进和变换都应属于本发明所附权利要求的保护范围。 It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present invention.
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