CN107884136A - A kind of failure test device of expansion joint - Google Patents
A kind of failure test device of expansion joint Download PDFInfo
- Publication number
- CN107884136A CN107884136A CN201711034688.5A CN201711034688A CN107884136A CN 107884136 A CN107884136 A CN 107884136A CN 201711034688 A CN201711034688 A CN 201711034688A CN 107884136 A CN107884136 A CN 107884136A
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- China
- Prior art keywords
- pipeline
- expansion joint
- flange
- annular seal
- seal space
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of failure test device of expansion joint, including：Left pipeline and right pipeline, the left flange of pipeline being connected with left pipeline, the right flange of pipeline being connected with right pipeline and the expansion joint between the left flange of pipeline and the right flange of pipeline is connected to by bolt and pad, wherein, the front of motor of the left pipeline and right pipeline is closed and internally forms annular seal space, and the inside of annular seal space is provided with heating arrangements；The outside of the annular seal space is provided with high pressure tank, and high pressure tank is sequentially connected balanced valve and flowmeter by pipeline and finally connected with annular seal space.The failure test apparatus structure of expansion joint of the present invention is simple and convenient to operate, and can be detected expansion joint connection system and be whether there is leakage phenomenon, the slip of expansion joint connection system is precisely calculated in and can.
Description
Technical field
The present invention relates to a kind of failure test device of expansion joint.
Background technology
Expansion joint is for compensation additional stress caused by temperature difference and mechanical oscillation, and is arranged on container casing or pipeline
On a kind of flexible structure.Using effective dilatation of expansion joint operative body, with absorption line, conduit, container etc. by heat
The reasons such as swollen shrinkage and caused change in size, or the axial of compensation pipes, conduit, container etc., transverse direction and angular displacement, also may be used
For noise-and-vibration-reduction.Have been widely used and the field such as environmental protection, chemical industry, metallurgy.In field of Environment Protection, in order to prevent heat supply pipeline liter
Wen Shi, pipe deforming or destruction are caused due to thermal stretching or temperature stress, it is necessary to set expansion joint on pipeline, to compensate pipe
The thermal stretching in road, so as to reduce the stress of tube wall and act on the active force on valve member or supporting structure.
Existing expansion joint is manufactured using homogenous material mostly, and high temperature resistance effect is poor, and service life is short.Some old-fashioned expansions
Also there is the defects of gas leakage in section, huge potential safety hazard be present to tour personnel and surrounding environment.
In order to improve the compactness of expansion joint connection system, it is necessary to obtain the slip of expansion joint connection system at high temperature
Data, it is therefore desirable to design the slip of expansion joint connection system under special device to test high temperature.
The content of the invention
It is an object of the invention to provide a kind of failure test device of expansion joint and the test method of device, expansion joint includes
Left female connector cylinder and right female connector cylinder are detachably connected, and are easy to expansion joint to be installed and cleared up, the failure test device knot of expansion joint
Structure is simple and convenient to operate, and can be detected expansion joint connection system and be whether there is leakage phenomenon, expansion joint is precisely calculated in and can
The slip of connection system.
In order to realize above-mentioned technical purpose, the technical solution adopted in the present invention is：
A kind of failure test device of expansion joint, including left pipeline and right pipeline, be connected with left pipeline the left flange of pipeline,
The right flange of pipeline that is connected with right pipeline and it is connected to by bolt and pad between the left flange of pipeline and the right flange of pipeline
Expansion joint, wherein, the front of motor of the left pipeline and right pipeline is closed and internally forms annular seal space, the inside of annular seal space
Provided with heating arrangements；
The outside of the annular seal space is provided with high pressure tank, and high pressure tank is sequentially connected balanced valve and flow by pipeline
Count and finally connected with annular seal space, the experimental rig also includes being used to measure annular seal space internal temperature and the sensor of pressure；
The expansion joint includes expansion joint body and the adpting flange installed in expansion joint both ends, the left flange of expansion joint and
It is respectively connected with and is used on bolt on bolt between the left flange of pipeline and between the right right flange of flange and pipeline of expansion joint
The linear displacement transducer of bolt elongate amount is measured, the straight-line displacement for measuring gasket compression amount is connected with the pad and is passed
Sensor, match somebody with somebody between the left left flange of flange and pipeline of the expansion joint and between the right right flange of flange and pipeline of expansion joint
Close the angular displacement sensor being connected with for measuring angular rotation of flange.
Described linear displacement transducer is LVDT, and the angular displacement sensor is RVDT.
Pipeline between the high pressure tank and balanced valve is provided with surge tank, the surge tank be provided with pressure gauge and
Temperature sensor.
Pressure regulator valve and relief valve are additionally provided with the surge tank.
Pipeline between the flowmeter and annular seal space is provided with heat exchanger.
The heat exchanger is double pipe heat exchanger, and described sleeve pipe formula heat exchanger provides cooling source by water tank.
The beneficial effect of the failure test device of expansion joint of the present invention is：
Firstth, a kind of expansion joint of the present invention, easy for installation, compact-sized, left female connector cylinder and right female connector cylinder are by heat proof material
It is made, improves the heat-resisting quantity of equipment, expansion tube is provided with outside expansion joint, and fill coctostable substance, improves expansion joint
Security and service life.
When the secondth, working, high pressure tank conveys gas into annular seal space, and the gas in annular seal space is heated by heating arrangements
The temperature and pressure value of body and the intracavity gas of monitoring sealing in real time, when reaching when testing temperature, testing temperature and pressurize foot are treated in holding
The enough time, now, if high pressure tank meets mass balances equation with the gas in annular seal space, show as sealing intracavity gas
Pressure value it is constant, then without leaking, if high pressure tank is unsatisfactory for mass balances equation, table with the gas in annular seal space
Now the pressure value for sealing intracavity gas diminishes, then leaks；Gas can influence the pressure of annular seal space from annular seal space leakage, lead to
The pressure of overbalance valve regulation pipeline both sides, the interior leakage how much gas of annular seal space will supplement how much gas in high pressure tank
Body, by the volume change of flowmeter detection gas, volume change is obtained by volume change, passes through volume change
Represent slip, you can accurately try to achieve leakage rate.The apparatus structure is simple and convenient to operate, and can detect Bolted Flanged Connection system
System whether there is leakage phenomenon, and and can accurately calculates the slip under different pressures and temperature conditionss, for improving expansion valve
The close Journal of Sex Research of connection system has reference significance.
3rd, the elongation of bolt, gasket compression amount and flange under Sensor monitoring different pressures and temperature conditionss are passed through
Corner, can optimize for bolt, pad and flange and improve and provide in the hope of the pretightning force of bolt and the data such as stress of pad
Data supports.
4th, high-pressure gas pressure inside the tank is larger, balanced valve can be caused to damage if being directly accessed balanced valve, influences work
Make the life-span, therefore be provided with surge tank on the pipeline between high pressure tank and balanced valve to play cushioning effect, press simultaneously
Power table and temperature sensor can detect the temperature and pressure in surge tank in real time.
5th, set pressure regulator valve to be used to adjust the pressure in surge tank on surge tank, be further ensured that the safety of balanced valve
Work.
6th, because the high-temperature gas in annular seal space can influence the measurement of flowmeter, thus flowmeter and annular seal space it
Between pipeline on the heat exchange that sets can play a part of heat exchange cooling, ensure that the measurement accuracy of flowmeter.
Brief description of the drawings
Fig. 1 is the structural representation of experimental rig of the present invention；
Fig. 2 is the scheme of installation of cathetus displacement transducer and angular displacement sensor of the present invention.
In figure：1- high pressure tanks；2- valves；3- pressure gauges；4- relief valves；5- surge tanks；6- pressure regulator valves；7- temperature passes
Sensor；8- minute-pressure balanced valves；9- micro-scale volume flowmeters；10- double pipe heat exchangers；11- water tanks；12- temperature-controlled cabinets；13-
Blind plate；14- left pipelines；15- right pipelines；16- pads；17- annular seal spaces；18- adding thermal resistances；20- is used to measure inside annular seal space
The sensor of temperature and pressure；24- bolts；25- linear displacement transducers；26- hand switches；27- angular displacement sensors；A- numbers
According to acquisition system.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As depicted in figs. 1 and 2, the failure test device of a kind of expansion joint, including left pipeline and right pipeline and left pipeline connect
The left flange of pipeline that connects, the right flange of pipeline being connected with right pipeline and the left flange of pipeline and pipe are connected to by bolt and pad
Expansion joint between the right flange in road, wherein, the front of motor of the left pipeline and right pipeline is closed and internally forms sealing
Chamber, the inside of annular seal space are provided with heating arrangements；The outside of the annular seal space is provided with high pressure tank, and high pressure tank passes through pipeline
It is sequentially connected balanced valve and flowmeter and is finally connected with annular seal space, the experimental rig also includes being used to measure inside annular seal space
The sensor of temperature and pressure；The expansion joint includes expansion joint body and the adpting flange installed in expansion joint both ends, expansion
On bolt on bolt between the left left flange of flange and pipeline of section and between the right right flange of flange and pipeline of expansion joint
The linear displacement transducer for measuring bolt elongate amount is respectively connected with, is connected with the pad for measuring gasket compression amount
Linear displacement transducer, between the left left flange of flange and pipeline of the expansion joint and expansion joint right flange and pipeline
The angular displacement sensor for measuring angular rotation of flange is connected between right flange.The apparatus structure is simple and convenient to operate, both
Expansion valve connection system can be detected and whether there is leakage phenomenon, and can accurately calculates the leakage under different pressures and temperature conditionss
Rate, there is reference significance for the close Journal of Sex Research for improving expansion valve connection system.
As shown in figure 1, in the present embodiment, the straight-line displacement for measuring bolt elongate amount is connected with the bolt and is passed
Sensor 25, the linear displacement transducer for measuring the decrement of pad 16, the left method of expansion joint are connected with the pad 16
It is connected between the blue and left flange of pipeline and between the right flange of expansion joint and the right flange of pipeline for measuring angular rotation of flange
Angular displacement sensor 27.
Because LVDT (linear variable difference transformer) and RVDT (Rotary Variable Differential transformer) service life grow, precision
Height is applied to measure small deformation, so in the present embodiment, linear displacement transducer uses LVDT, angular displacement sensor 27
Using RVDT.
The elongation of the bolt under relevant temperature and pressure can be measured by linear displacement transducer 25 (LVDT), then
Dependent variable and pretightning force and the compression in relevant temperature and pressure lower gasket 16 of bolt can be obtained by being calculated by formula
Amount, then calculates the compressive stres of pad 16 and remaining compressive stres, finally by corresponding formula (compression and back by formula
Play curve representation formula) stress that can be in the hope of pad 16 at such a temperature, RVDT have recorded in relevant temperature and pressure lower flange
Corner, LVDT and RVDT are bolt, pad 16 and flange optimization and improvement provide data support.
As shown in figure 1, a preferred embodiment as technical solution of the present invention, in the present embodiment, the high pressure storage
Pipeline between gas tank 1 and minute-pressure balanced valve 8 is provided with surge tank 5, is set on the pipeline between high pressure tank 1 and surge tank 5
There is valve 2, the surge tank 5 is provided with pressure gauge 3 and temperature sensor 7.Pressure is larger in high pressure tank 1, if directly
Access minute-pressure balanced valve 8 can cause to damage to minute-pressure balanced valve, influence working life, therefore put down with minute-pressure in high pressure tank 1
Pipeline between weighing apparatus valve 8, which is provided with surge tank 5, can play cushioning effect, while pressure gauge 3 and temperature sensor 7 can be real-time
Detect the temperature and pressure in surge tank 5.
As shown in figure 1, a preferred embodiment as technical solution of the present invention, in the present embodiment, the surge tank 5
On be additionally provided with pressure regulator valve 6 and relief valve 4.Set pressure regulator valve 6 to be used to adjust the pressure in surge tank 5 on surge tank 5, further protect
Demonstrate,prove the trouble free service of minute-pressure balanced valve 8；Relief valve 4 is set to be used for after the completion of whole detection works and right pipeline on surge tank 5
The pressure release together of relief valve 4.
As shown in figure 1, a preferred embodiment as technical solution of the present invention, in the present embodiment, the micro body
Pipeline between product flowmeter 9 and annular seal space 17 is provided with double pipe heat exchanger 10, and it is pipeline that double pipe heat exchanger 10, which is applied to,
Interior gas cooling, described sleeve pipe formula heat exchanger provide cooling source by water tank 11, and water tank 11 is connected with double pipe heat exchanger 10
Valve 2 is equipped with import and export pipeline.Because the high-temperature gas in annular seal space 17 can influence the measurement of micro-scale volume flowmeter 9,
Therefore the heat exchange set on the pipeline between micro-scale volume flowmeter and annular seal space 17 can play a part of heat exchange cooling, protect
The measurement accuracy of micro-scale volume flowmeter 9 is demonstrate,proved.
In the present embodiment, the gas in the high pressure tank 1 is helium.Using helium as in high pressure tank 1
Gas, danger will not be produced by being heated to high temperature, securely and reliably.
As shown in figure 1, the present invention is additionally provided with data collecting system A, above-mentioned all sensors, for measuring in annular seal space
Sensor 20, the temperature sensor 7 on surge tank 5, linear displacement transducer 25, the angular displacement sensor 27 of portion's temperature and pressure
It is connected with data collecting system A.
The workflow of experimental rig of the present invention is：
Step 1. first closes all valves 2, only opens the valve 2 on the pipeline between high pressure tank 1 and surge tank 5,
Helium in high pressure tank 1 enters in surge tank 5, opens the import and export pipeline that water tank 11 is connected with double pipe heat exchanger 10
On valve 2, minute-pressure balanced valve is opened after helium is stable, helium is transported in annular seal space 17, observes pressure on surge tank 5
The registration of table 3 and temperature sensor 7, temperature-controlled cabinet 12 control adding thermal resistance 18 to be heated to treating to the helium inside annular seal space 17
Testing temperature, while the helium in 10 pairs of pipelines being connected with annular seal space 17 of double pipe heat exchanger radiates, and is sealed for measuring
The sensor 20 of intracavitary portion temperature and pressure monitors in real time and records the temperature and pressure of the helium gas inside of annular seal space 17.
For step 2. when reaching when testing temperature, testing temperature and pressurize time enough are treated in holding, now, if high pressure tank
1 meets mass balances equation with the helium in annular seal space 17：(wherein, P1, P2 are respectively surge tank 5 and sealing
Pressure inside chamber 17, V1, V2 are respectively the volume of surge tank 5 and annular seal space 17, and T1, T2 are respectively surge tank 5 and annular seal space
Temperature inside 17), i.e., the pressure value of gas is constant in annular seal space 17, then without leaking, if high pressure tank 1 and sealing
Helium in chamber 17 is unsatisfactory for mass balances equation, i.e., the pressure value of gas diminishes in annular seal space 17, then leaks；Gas from
Annular seal space 17, which leaks, can influence the pressure of annular seal space 17, adjust the pressure of pipeline both sides by minute-pressure balanced valve 8, in annular seal space 17
The volume of the detection gas of micro-scale volume flowmeter 9 will be passed through from the inner supplement how much gas of high pressure tank 1 by revealing how much gas
Variation delta V, volume change is obtained by volume change Δ V： (wherein, the slip of L gases, t is between the time
Every), slip is represented by volume change, you can accurately try to achieve leakage rate.
Step 3. closes the hand switch 26 being connected with LVDT and RVDT after the heat-insulation pressure keeping regular hour, reads phase
Elongation, the decrement of pad 16 and the corner of flange of bolt in seasonable interior data collecting system A.
After step 4. pending data gathers, the relief valve 4 opened on the relief valve 4 and surge tank 5 in right pipeline 21 is right
Pipeline carries out pressure release.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (6)
1. the failure test device of a kind of expansion joint, it is characterised in that including left pipeline and right pipeline, the pipe being connected with left pipeline
The left flange in road, the right flange of pipeline being connected with right pipeline and the left flange of pipeline and the right method of pipeline are connected to by bolt and pad
Expansion joint between orchid, wherein, the front of motor of the left pipeline and right pipeline is closed and internally forms annular seal space, sealing
The inside of chamber is provided with heating arrangements；
The outside of the annular seal space is provided with high pressure tank, and high pressure tank is sequentially connected balanced valve and flowmeter simultaneously by pipeline
Finally connected with annular seal space, the experimental rig also includes being used to measure annular seal space internal temperature and the sensor of pressure；
The expansion joint includes expansion joint body and the adpting flange installed in expansion joint both ends, the left flange and pipeline of expansion joint
It is respectively connected with bolt on bolt between left flange and between the right right flange of flange and pipeline of expansion joint for measuring
The linear displacement transducer of bolt elongate amount, the straight-line displacement for measuring gasket compression amount is connected with the pad and is sensed
Device, coordinate between the left left flange of flange and pipeline of the expansion joint and between the right right flange of flange and pipeline of expansion joint
It is connected with the angular displacement sensor for measuring angular rotation of flange.
2. the failure test device of expansion joint as claimed in claim 1, it is characterised in that described linear displacement transducer is
LVDT, the angular displacement sensor are RVDT.
3. the failure test device of expansion joint as described in claim 2, it is characterised in that：The high pressure tank and balanced valve
Between pipeline be provided with surge tank, the surge tank is provided with pressure gauge and temperature sensor.
4. the failure test device of expansion joint as claimed in claim 3, it is characterised in that：Pressure regulator valve is additionally provided with the surge tank
And relief valve.
5. the failure test device of expansion joint as claimed in claim 1, it is characterised in that：Between the flowmeter and annular seal space
Pipeline is provided with heat exchanger.
6. the failure test device of expansion joint as claimed in claim 5, it is characterised in that：The heat exchanger is casing type heat exchanging
Device, described sleeve pipe formula heat exchanger provide cooling source by water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711034688.5A CN107884136A (en) | 2017-10-30 | 2017-10-30 | A kind of failure test device of expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711034688.5A CN107884136A (en) | 2017-10-30 | 2017-10-30 | A kind of failure test device of expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107884136A true CN107884136A (en) | 2018-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711034688.5A Pending CN107884136A (en) | 2017-10-30 | 2017-10-30 | A kind of failure test device of expansion joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207891A (en) * | 2020-01-15 | 2020-05-29 | 长春理工大学 | Detection device and method for plate pairs of semi-welded plate heat exchanger |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004493A (en) * | 2015-07-17 | 2015-10-28 | 武汉工程大学 | Leakage-detecting device for bolted flange connection system |
| CN205562129U (en) * | 2016-04-24 | 2016-09-07 | 中国大唐集团科学技术研究院有限公司西北分公司 | Expansion joint equipment in heat supply pipeline |
| CN206556861U (en) * | 2017-03-16 | 2017-10-13 | 沈阳斯林达深冷科技有限公司 | Expansion bellow fatigue experimental device |
-
2017
- 2017-10-30 CN CN201711034688.5A patent/CN107884136A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004493A (en) * | 2015-07-17 | 2015-10-28 | 武汉工程大学 | Leakage-detecting device for bolted flange connection system |
| CN205562129U (en) * | 2016-04-24 | 2016-09-07 | 中国大唐集团科学技术研究院有限公司西北分公司 | Expansion joint equipment in heat supply pipeline |
| CN206556861U (en) * | 2017-03-16 | 2017-10-13 | 沈阳斯林达深冷科技有限公司 | Expansion bellow fatigue experimental device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207891A (en) * | 2020-01-15 | 2020-05-29 | 长春理工大学 | Detection device and method for plate pairs of semi-welded plate heat exchanger |
| CN111207891B (en) * | 2020-01-15 | 2021-07-16 | 长春理工大学 | Detection device and method for plate pairs of semi-welded plate heat exchanger |
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Application publication date: 20180406 |