CN210741840U - Flange joint pre-tightening optimization comprehensive testing device - Google Patents
Flange joint pre-tightening optimization comprehensive testing device Download PDFInfo
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- CN210741840U CN210741840U CN201922326349.5U CN201922326349U CN210741840U CN 210741840 U CN210741840 U CN 210741840U CN 201922326349 U CN201922326349 U CN 201922326349U CN 210741840 U CN210741840 U CN 210741840U
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Abstract
The utility model discloses a flange joint pretension optimization integrated test device, including flange mounting regulation test module, emollient test module, leakage rate test module and test platform, flange mounting regulation test module, emollient test module and leakage rate test module all set up on test platform, and test platform provides the support for each test module, has improved the structural stability of device, is provided with the controller on the test platform, and the operator of being convenient for controls each test module and learns the testing result in real time. The flange installation procedure testing module can be used for testing the flange installation procedure, the lubricant testing module can be used for testing the influence of the lubricant on the bolt pretightening force, the leakage rate testing module can be used for testing the leakage rate of the gasket, the installation procedure and the leakage rate combined testing test can be carried out, and the testing work efficiency is improved.
Description
Technical Field
The utility model relates to a connect fastener and detect technical field, especially relate to a flange joint pretension optimization integrated test device.
Background
The pressure-bearing equipment has more detachable sealing connection forms, such as threaded connection, socket connection, flange connection and the like, wherein the flange connection is most commonly applied in industry due to simple structure and convenient assembly and disassembly. However, in the actual use process, under the influence of medium pressure, temperature, additional bending moment and additional axial force of the pipe system, leakage is easy to occur at the connecting joint, so that sealing failure is caused, energy is wasted, the environment is seriously polluted, the human health is damaged, and even disastrous accidents such as explosion are caused.
The flange connection structure mainly comprises a flange, a bolt and a gasket, and the flange rings of equipment or pipelines are connected together by means of the pretightening force of the bolt to compress the gasket so as to realize the sealing of the connection part. Flange connections are important sealing connections, and require reliable tightness and sufficient strength. Engineering practices show that bolt flange connections rarely fail in strength, and most fail due to leakage caused by insufficient sealing performance. Statistics shows that the main reasons causing leakage failure of the flange joint are the reasons of insufficient gasket quality, insufficient bolt pretightening force and the like. In general, the compression resilience of the gasket is a main technical index, but the index does not show the leakage performance of the gasket, namely the leakage rate level of the gasket is unknown, so that the gasket with the leakage rate exceeding the standard can be used in an industrial field, and the flange joint is leaked. In addition, the installation quality of flange connection directly influences the bolt pretightening force, if the installation quality is not over-closed, the bolt pretightening force in a flange joint is uneven, and weak points are inevitably generated in the later use process to cause leakage failure. The key link in the installation quality is the pre-tightening sequence of the bolt group, and different pre-tightening sequences can influence the installation efficiency, the final bolt force and the uniformity of force value distribution in the bolt group. In conclusion, the gasket leakage performance detection and the bolt group installation order evaluation optimization have important practical significance for improving the sealing performance of the bolt flange joint and developing related scientific research, but in the prior art, special equipment for detecting and evaluating the sealing performance of the flange joint is lacked.
Therefore, how to provide a comprehensive device capable of detecting and evaluating the sealing performance of the flange joint becomes a problem to be solved urgently by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a comprehensive testing device is optimized to flange joint pretension to solve the problem that above-mentioned prior art exists, make the operator can carry out the leakage rate of gasket, flange mounting regulation and the test of evaluation emollient to the bolt pretightning force conveniently.
In order to achieve the above object, the utility model provides a following scheme: the utility model provides a comprehensive testing arrangement is optimized to flange joint pretension, include:
the flange installation procedure testing module comprises a flat welding flange, a first bolt and nut group and a first flange plate, wherein the flat welding flange can be connected with the first flange plate through the first bolt and nut group, and a gasket is arranged between the flat welding flange and the first flange plate;
a lubricant testing module comprising a second bolt and nut set;
the leakage rate testing module comprises a third bolt and nut group and two second flange plates, the two second flange plates are connected through the third bolt and nut group, a gasket is arranged between the two second flange plates, a leakage detecting cavity is formed between the two second flange plates, one end of the leakage detecting cavity is connected with a high-pressure gas cylinder, the high-pressure gas cylinder can convey gas into the leakage detecting cavity, a standard container is arranged between the leakage detecting cavity and the high-pressure gas cylinder, the standard container can store gas, the other end of the leakage detecting cavity is communicated with the external environment, and the leakage detecting cavity is further connected with a pressure transmitter and a thermocouple;
gasket type pressure sensors are arranged at the first bolt and nut group, the second bolt and nut group and the third bolt and nut group;
the test platform, flange installation regulation test module, emollient test module and leakage rate test module all set up in on the test platform, the last controller that is provided with of test platform, pressure transmitter, thermocouple and gasket formula pressure sensor all with the controller links to each other.
Preferably, the test platform includes a first column and a second column arranged in parallel, the number of the flange installation procedure test modules is two, the two sets of the flange installation procedure test modules are respectively arranged on the first column and the second column, a connecting plate is arranged between the first column and the second column, the axes of the first column and the second column are perpendicular to the connecting plate, and the lubricant test modules are arranged on the connecting plate.
Preferably, the height of the first upright is higher than that of the second upright, one set of the flange installation procedure testing module is connected with the top of the first upright through an elbow, the axis of the flange installation procedure testing module is perpendicular to the axis of the first upright, the other set of the flange installation procedure testing module is connected with the second upright through a support frame, and the axis of the flange installation procedure testing module is perpendicular to the axis of the second upright.
Preferably, the elbow and the first upright column, the support frame and the second upright column are detachably connected, and the mounting positions of the support frame and the second upright column can be adjusted.
Preferably, the connecting plate includes parallel arrangement's upper junction plate and lower connecting plate, the upper junction plate is located the top of lower connecting plate, the upper junction plate with have the clearance down between the connecting plate, the upper junction plate, the both ends of lower connecting plate respectively with first stand, the second stand links to each other, the upper junction plate has the through-hole that can hold second bolt and nut group passes, the bottom of second bolt and nut group with the lower connecting plate butt.
Preferably, the leak rate test module further comprises a buffer tank located between the standard vessel and the high pressure gas cylinder.
Preferably, flow regulating valves are arranged between the leakage detection cavity and the high-pressure gas cylinder and between the leakage detection cavity and the external environment, pressure reducing valves are arranged between the high-pressure gas cylinder and the leakage detection cavity, and valves are arranged on the standard container, the buffer tank and the high-pressure gas cylinder.
Preferably, the leakage detection cavity is connected with the high-pressure gas cylinder through a hose, and the standard container and the buffer tank are both connected with the hose.
The utility model discloses for prior art gain following technological effect: the utility model provides a comprehensive testing arrangement is optimized to flange joint pretension, including flange mounting regulation test module, emollient test module, leakage rate test module and test platform, flange mounting regulation test module, emollient test module and leakage rate test module all set up on test platform, and test platform provides the support for each test module, has improved the structural stability of device, is provided with the controller on the test platform, and the operator of being convenient for controls each test module and learns the testing result in real time. The flange installation procedure testing module can be used for testing the flange installation procedure, the lubricant testing module can be used for testing the influence of the lubricant on the bolt pretightening force, the leakage rate testing module can be used for testing the leakage rate of the gasket, the installation procedure and the leakage rate combined testing test can be carried out, and the testing work efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural view of the flange joint pre-tightening optimization comprehensive test device of the present invention;
fig. 2 is a schematic view of the flange joint pre-tightening optimization comprehensive test device in the front view direction;
fig. 3 is a schematic diagram of a right-view direction of the flange joint pre-tightening optimization comprehensive testing device of the present invention;
fig. 4 is a schematic view of the downward direction of the flange joint pre-tightening optimization comprehensive testing device of the present invention;
fig. 5 is a schematic axial side view of a partial structure of the flange joint pre-tightening optimization comprehensive testing device of the present invention;
fig. 6 is a disassembly schematic view of a flange mounting procedure testing module of the flange joint pretension optimization comprehensive testing device of the present invention;
fig. 7 is a schematic view of the gas circuit working principle of the leakage rate testing module of the flange joint pre-tightening optimization comprehensive testing device of the present invention;
wherein, 1 is flange installation regulation test module, 2 is emollient test module, 3 is leakage rate test module, 4 is test platform, 5 is the flat welded flange, 6 is first bolt and nut group, 7 is first ring flange, 8 is the gasket, 9 is second bolt and nut group, 10 is third bolt and nut group, 11 is the second ring flange, 12 is high-pressure gas cylinder, 13 is standard container, 14 is pressure transmitter, 15 is the thermocouple, 16 is gasket formula pressure sensor, 17 is first stand, 18 is the second stand, 19 is the elbow, 20 is the support frame, 21 is the upper junction plate, 22 is the lower junction plate, 23 is the buffer tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a comprehensive testing device is optimized to flange joint pretension to solve the problem that above-mentioned prior art exists, make the operator can carry out the leakage rate of gasket, flange mounting regulation and the test of evaluation emollient to the bolt pretightning force conveniently.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1-7, wherein fig. 1 is a schematic structural view of a flange joint pretension optimization comprehensive test device of the present invention, FIG. 2 is a schematic view of the flange joint pre-tightening optimization comprehensive testing device according to the present invention, FIG. 3 is a right-side view schematic diagram of the flange joint pre-tightening optimization comprehensive testing device of the present invention, FIG. 4 is a schematic top view of the optimized integrated testing device for flange joint pretension of the present invention, FIG. 5 is a schematic axial side view of a partial structure of the optimized integrated testing device for flange joint pretension according to the present invention, FIG. 6 is a disassembled view of a flange mounting rule testing module of the flange joint pre-tightening optimization comprehensive testing device of the present invention, fig. 7 is the utility model discloses a flange joint pretension optimizes comprehensive testing arrangement's leakage rate test module's gas circuit theory of operation schematic diagram.
The utility model provides a comprehensive testing arrangement is optimized to flange joint pretension, include:
the flange installation regulation test module 1, the flange installation regulation test module 1 includes the flat welding flange 5, first bolt and nut group 6 and first ring flange 7, and the flat welding flange 5 can link to each other with first ring flange 7 through first bolt and nut group 6, sets up gasket 8 between flat welding flange 5 and the first ring flange 7.
The lubricant testing module 2, the lubricant testing module 2 includes a second bolt and nut set 9.
Leakage rate test module 3, leakage rate test module 3 includes third bolt and nut group 10 and two second ring flange 11 dishes, two second ring flange 11 dishes link to each other through third bolt and nut group 10, set up gasket 8 between two second ring flange 11, form the leakage detection cavity between two second ring flange 11, the one end of leakage detection cavity is connected with high-pressure gas cylinder 12, high-pressure gas cylinder 12 can be to the internal transported gas of leakage detection cavity, be provided with standard container 13 between leakage detection cavity and the high-pressure gas cylinder 12, standard container 13 can store gas, the other end of leakage detection cavity is linked together with external environment, the leakage detection cavity still is connected with pressure transmitter 14 and thermocouple 15, pressure transmitter 14 can test the pressure in the leakage detection cavity, thermocouple 15 can test the temperature in the leakage detection cavity.
First bolt and nut group 6, second bolt and nut group 9 and third bolt and nut group 10 department all are provided with gasket formula pressure sensor 16, and gasket formula pressure sensor 16's quantity is unanimous with the bolt and nut's that specifically uses quantity in the experiment, improves the test result accuracy.
The test platform 4, the flange installation procedure test module 1, the lubricant test module 2 and the leakage rate test module 3 are all arranged on the test platform 4, a controller is arranged on the test platform 4, and the pressure transmitter 14, the thermocouple 15 and the gasket type pressure sensor 16 are all connected with the controller.
The utility model provides a comprehensive testing arrangement is optimized to flange joint pretension, including flange mounting regulation test module 1, emollient test module 2, leakage rate test module 3 and test platform 4, flange mounting regulation test module 1, emollient test module 2 and leakage rate test module 3 all set up on test platform 4, test platform 4 provides the support for each test module, has improved the structural stability of device, is provided with the controller on test platform 4, the operator of being convenient for controls each test module and learns the testing result in real time. Utilize flange installation regulation test module 1 can test the flange installation regulation, utilize emollient test module 2 can carry out the experiment of emollient to the influence of bolt pretightning force, utilize leakage rate test module 3 can test the leakage rate of gasket 8, can also carry out installation regulation, leakage rate joint test, improve test work efficiency.
The test platform 4 comprises a first upright column 17 and a first upright column 18 which are arranged in parallel, the number of the flange installation procedure test modules 1 is two, the two sets of the flange installation procedure test modules 1 can test flanges with DN125 specifications and flanges with DN250 specifications, the test of flange installation procedures with different specifications is realized, the two sets of the flange installation procedure test modules 1 are respectively arranged on the first upright column 17 and the first upright column 18, a connecting plate is arranged between the first upright column 17 and the first upright column 18, the first upright column 17 and the axis of the first upright column 18 are perpendicular to the connecting plate, the lubricant test module 2 is arranged on the connecting plate, the connecting plate is connected with the first upright column 17 and the first upright column 18, the structural stability is enhanced, and the lubricant test module 2 is arranged on the connecting plate, so that the space is saved. In this embodiment, the first upright column 17 and the second upright column 18 are respectively connected with the base bolt of the testing platform 4, so that the assembly and disassembly are convenient, and the stability and the rigidity of the testing platform can be ensured.
Specifically, the height of the first upright column 17 is higher than that of the first upright column 18, one set of the flange installation procedure test module 1 is connected with the top of the first upright column 17 through an elbow 19, the axis of the flange installation procedure test module 1 is perpendicular to the axis of the first upright column 17, the other set of the flange installation procedure test module 1 is connected with the first upright column 18 through a support frame 20, the axis of the flange installation procedure test module 1 is perpendicular to the axis of the first upright column 18, and the axis of the flange installation procedure test module 1 is perpendicular to the axis of the first upright column 17/the first upright column 18, so that an operator can conveniently perform test operation.
Simultaneously, elbow 19 and first stand 17, support frame 20 and the equal detachable connection of first stand 18, the dismouting of being convenient for, support frame 20 can be adjusted with the mounted position of first stand 18, makes things convenient for operating personnel to adjust the relative position of elbow 19 and first stand 17, support frame 20 and first stand 18 according to experimental needs, improves experimental simple operation nature.
More specifically, the connecting plate includes parallel arrangement's upper junction plate 21 and lower connecting plate 22, upper junction plate 21 is located the top of lower connecting plate 22, the clearance has between upper junction plate 21 and the lower connecting plate 22, upper junction plate 21, the both ends of lower connecting plate 22 respectively with first stand 17, first stand 18 links to each other, upper junction plate 21 has the through-hole that can hold second bolt and nut group 9 and pass, the bottom and the lower connecting plate 22 butt of second bolt and nut group 9, lower connecting plate 22 can provide the support for second bolt and nut group 9, in this embodiment, the quantity of upper junction plate 21 through-hole is three, three through-hole equidistant setting, improve the structural stability of connecting plate.
In addition, the leakage rate test module 3 further comprises a buffer tank 23, the buffer tank 23 is located between the standard container 13 and the high-pressure gas bottle 12, and the buffer tank 23 can buffer the pressure of the pipeline during testing to protect the safety of the pipeline.
In this embodiment, flow control valves are disposed between the leak detection cavity and the high-pressure gas cylinder 12 and between the leak detection cavity and the external environment, pressure reducing valves are disposed between the high-pressure gas cylinder 12 and the leak detection cavity, and the standard container 13, the buffer tank 23 and the high-pressure gas cylinder 12 are all provided with valves, so that control and adjustment are facilitated, and smooth proceeding of the test is ensured.
The leak detection cavity is connected with the high-pressure gas cylinder 12 through a hose, and the standard container 13 and the buffer tank 23 are both connected with the hose.
Utilize the utility model discloses a comprehensive testing device is optimized to flange joint pretension carries out flange joint pretension and optimizes comprehensive testing method, include following step:
the method comprises the steps of firstly, determining a fastening regulation of the flange structure to be detected, wherein the fastening regulation comprises a target pre-tightening load, a fastening mode, a fastening round and a load application proportion, the target pre-tightening load is determined by combining the size of a first bolt and nut group 6 and cannot exceed the bolt bearing range, the first bolt and nut group 6 in a flange installation regulation testing module 1 is unscrewed, a gasket type pressure sensor 16 is started, the first bolt and nut group 6 is rotated to a screwing state, the gasket type pressure sensor 16 is set to be zero, torque is applied to the first bolt and nut group 6 through a torque wrench according to the fastening regulation of the flange structure to be detected until the fastening regulation is set to be completed, and in the loading process, a controller can obtain the load value of bolts in the first bolt and nut group 6 for evaluating the rationality of the fastening regulation.
Selecting a test bolt and a reference bolt in the second bolt and nut group 9 by using the lubricant testing module 2, uniformly coating the lubricant to be detected on the thread of the test bolt and the inner side of the nut matched with the test bolt, manually installing the nut without screwing, starting the gasket type pressure sensor 16 without coating the lubricant on the reference bolt and the reference nut, screwing the bolt, setting the gasket type pressure sensor 16 to zero, starting the test, applying torque to the second bolt and nut group 9 until the target pretightening force is reached, and obtaining the load values of the test bolt and the reference bolt by the controller so as to evaluate the effect of the lubricant.
Step three, utilizing the leakage rate testing module 3
Before testing, cleaning the sealing surfaces of the second flanges 11 by using a solvent (such as acetone), applying gasket pre-tightening stress to the gasket 8 between the two second flanges 11, wherein the pre-tightening force of the gaskets 8 made of different materials is as shown in the following table, and keeping for a period of time after the gasket 8 reaches a specified value;
testable pad and experimental conditions
Calibrating the volume of the cavity between two second flanges 11
The high-pressure gas bottle 12 is led into the leakage detection cavity with the pressure psThe high-pressure gas cylinder 12 is closed, the leak detection cavity is communicated with the standard container 13, and the balance pressure p after the leak detection cavity is communicated with the standard container 13 is measuredεThe volume of the cavities of the two second flange plates 11 is calculated according to the following formula:
in the formula:
Vsvolume of the leak detection chamber in cubic centimetres
VBVolume of the standard container 13 in cubic centimeters
pBInitial absolute pressure in Pa in the reference container 13
psAbsolute pressure of test medium introduced into leak detection chamber in Pa
peAbsolute pressure in Pa after the standard container 13 is connected to the leak detection chamber
The calibration process is repeated three times, the arithmetic mean of the volumes measured three times is used as the volume of the cavity between the two second flange plates 11, and the deviation of the volume value measured each time from the mean value should not be more than 3%.
Measuring the leakage rate of the gasket 8
Introducing a test medium into the leakage detection cavity, keeping for a period of time when the pressure of the medium reaches a specified value, starting leakage detection, and recording the pressure p of the leakage detection cavity when the leakage detection starts3And temperature T3And the time is recorded, the pressure p in the leakage detection cavity at the end of measurement is recorded and measured4And temperature T4The leak rate of the gasket 8 is calculated as follows:
in the formula:
Lvvolumetric leakage rate, Ncm3/s
pstAtmospheric pressure at standard conditions of 101325Pa
TstAbsolute temperature of the atmosphere at standard conditions, 273.15K
p3Absolute pressure in pa in the leak detection chamber at the beginning of the leak detection
p4Absolute pressure in the leak detection chamber at the end of the leak detectionIn units of pa
T3Absolute temperature in the leak detection chamber at the beginning of the leak detection, in K
T4Absolute temperature in the leak detection chamber at the end of the leak detection, in K
VsVolume of the leak detection chamber in cubic centimetres
And t is the leakage detection time in seconds.
The average of all tests was taken as the final test result.
In the third step, applying gasket pre-tightening stress to the gasket 8 between the two second flange plates 11, and keeping for 15min after the specified value is reached; when the leakage rate of the gasket 8 is measured, a test medium is introduced into the leakage detection cavity, the pressure of the medium is kept for 10min after reaching a specified value, and the measurement time is 2-10 min.
By utilizing the flange joint pre-tightening optimization comprehensive testing device, the leakage rate of gasket sealing, flange installation regulations, a test for evaluating the pre-tightening force of a lubricating agent on a bolt and a joint test of installation regulations and leakage rate can be measured simultaneously; the bolt group pretightening force test tests with different flange specifications and different installation positions are realized; and simultaneously, the utility model discloses a device can also directly be applied to industrial field, and whether test, check-up flange seal structure pretightning force are up to standard.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. The utility model provides a comprehensive testing arrangement is optimized in flange joint pretension which characterized in that includes:
the flange installation procedure testing module comprises a flat welding flange, a first bolt and nut group and a first flange plate, wherein the flat welding flange can be connected with the first flange plate through the first bolt and nut group, and a gasket is arranged between the flat welding flange and the first flange plate;
a lubricant testing module comprising a second bolt and nut set;
the leakage rate testing module comprises a third bolt and nut group and two second flange plates, the two second flange plates are connected through the third bolt and nut group, a gasket is arranged between the two second flange plates, a leakage detecting cavity is formed between the two second flange plates, one end of the leakage detecting cavity is connected with a high-pressure gas cylinder, the high-pressure gas cylinder can convey gas into the leakage detecting cavity, a standard container is arranged between the leakage detecting cavity and the high-pressure gas cylinder, the standard container can store gas, the other end of the leakage detecting cavity is communicated with the external environment, and the leakage detecting cavity is further connected with a pressure transmitter and a thermocouple;
gasket type pressure sensors are arranged at the first bolt and nut group, the second bolt and nut group and the third bolt and nut group;
the test platform, flange installation regulation test module, emollient test module and leakage rate test module all set up in on the test platform, the last controller that is provided with of test platform, pressure transmitter, thermocouple and gasket formula pressure sensor all with the controller links to each other.
2. The flange joint pretension optimization comprehensive test device according to claim 1, characterized in that: the test platform comprises a first stand column and a second stand column which are arranged in parallel, the number of the flange installation procedure test modules is two, the two sets of the flange installation procedure test modules are respectively arranged on the first stand column and the second stand column, a connecting plate is arranged between the first stand column and the second stand column, the axes of the first stand column and the second stand column are perpendicular to the connecting plate, and the lubricant test modules are arranged on the connecting plate.
3. The flange joint pretension optimization comprehensive test device according to claim 2, characterized in that: the height of the first upright column is higher than that of the second upright column, one set of the flange installation procedure testing module is connected with the top of the first upright column through an elbow, the axis of the flange installation procedure testing module is perpendicular to the axis of the first upright column, the other set of the flange installation procedure testing module is connected with the second upright column through a support frame, and the axis of the flange installation procedure testing module is perpendicular to the axis of the second upright column.
4. The flange joint pretension optimization comprehensive test device according to claim 3, characterized in that: the elbow with first stand, the support frame with the equal detachable connection of second stand, the support frame with the mounted position of second stand can be adjusted.
5. The flange joint pretension optimization comprehensive test device according to claim 3, characterized in that: the connecting plate includes parallel arrangement's upper junction plate and lower connecting plate, the upper junction plate is located the top of lower connecting plate, the upper junction plate with have the clearance down between the connecting plate, the upper junction plate down the both ends of connecting plate respectively with first stand the second stand links to each other, the upper junction plate has can hold the through-hole that second bolt and nut group passed, the bottom of second bolt and nut group with lower connecting plate butt.
6. The flange joint pretension optimization comprehensive test device according to claim 1, characterized in that: the leakage rate test module further comprises a buffer tank, and the buffer tank is located between the standard container and the high-pressure gas cylinder.
7. The flange joint pretension optimization comprehensive test device according to claim 6, characterized in that: flow regulating valves are arranged between the leakage detection cavity and the high-pressure gas cylinder and between the leakage detection cavity and the external environment, a pressure reducing valve is arranged between the high-pressure gas cylinder and the leakage detection cavity, and valves are arranged on the standard container, the buffer tank and the high-pressure gas cylinder.
8. The flange joint pretension optimization comprehensive test device according to claim 7, characterized in that: the leakage detection cavity is connected with the high-pressure gas cylinder through a hose, and the standard container and the buffer tank are both connected with the hose.
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| CN110864896A (en) * | 2019-12-23 | 2020-03-06 | 中国特种设备检测研究院 | Flange joint pre-tightening optimization comprehensive test device and method |
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