CN107436261A - A kind of PCCP hydraulic test of pipeline method - Google Patents
A kind of PCCP hydraulic test of pipeline method Download PDFInfo
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- CN107436261A CN107436261A CN201710533255.8A CN201710533255A CN107436261A CN 107436261 A CN107436261 A CN 107436261A CN 201710533255 A CN201710533255 A CN 201710533255A CN 107436261 A CN107436261 A CN 107436261A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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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
- G01M3/28—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 pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—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 pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—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 pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0611—Hydraulic or pneumatic indicating, recording or sensing means
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- General Physics & Mathematics (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention belongs to PCCP pipe technologies field, is related to a kind of PCCP hydraulic test of pipeline method.Including：Joint bulge test three times；In the hydrostatic pressing stage, manual exhaust is carried out by the high point air bleeding valve valve that exhaust and three passage ports on steel bridgeware weld automatically；Test pipe hydrostatic test and record are carried out using water flood.Beneficial effects of the present invention are：The new Hydraulic test technique of PCCP pipelines shortens the test period in application process, reduces temporary facility and abandons water, while obtains very big economic benefit.
Description
Technical field
The invention belongs to PCCP pipe technologies field, is related to a kind of PCCP hydraulic test of pipeline method.
Background technology
At present, domestic and international PCCP pipelines are generally segmented the carry out water pressure test, and section length is no more than 1.0km, entered several times
OK, temporary concrete or stone masonry parados need to be removed repeatedly, and water pressure test water can not recycle, to PCCP installations
Continuity affects greatly, and required construction period is longer.
For example, Application No. CN201220174708 utility model patent, discloses a kind of pressure pipeline water pressure test
Device, including：
Electronic pressuring pump, suction hose, outlet pipe, water tank, water meter, pressure gauge, pressure sensor and control device；
Electronic pressuring pump is provided with suction hose and outlet pipe, and suction hose is arranged in the water tank, and the outlet of outlet pipe is made
To connect the connector of pressure pipeline；
Pressure sensor, pressure gauge and water meter are set gradually on the outlet pipe；
The control device, electrically connected respectively with the pressure sensor and electronic pressuring pump, pressure sensor can be received
With the signal of water meter, the hydraulic pressure and rate of water make-up of monitoring and record institute test pressure pipeline, and according to the hydraulic pressure of monitoring and default
Test the start and stop of electronic pressuring pump described in hydraulic pressure control.
The course of work of above-mentioned experimental rig is as follows：
Pressure experimental device is connected by the pressure testing mouth of connector and pipeline, after trial operation, according to actual testing pressure
Pipeline, corresponding category of piping materials, caliber are selected in control device, input the length of test section, the time in master trip stage, examination
Soak time and the operating pressure of pipeline before testing, control device installation national standard calculate the test pressure of pipeline hydraulic pressure, control device
Parameter above is read into pressure testing program.Start pressure testing process.In the trial test stage, check that pipe joint and accessory etc. have
Phenomenon is damaged without leak, there is then pressure testing again after taking measures.In the master trip stage, test pressure is measured, calculate the pressure of pipeline
Drop, when being no more than default pressure drop values at the appointed time, test pressure is down to operating pressure and constant pressure provides
Time, then the water pressure test is qualified for no drainage.When pressure pipeline is using allowing water percolating capacity to carry out final qualified judgement, water meter
The rate of water make-up of record should be less than the permission water percolating capacities of national regulations.It is depressured after pressure testing is qualified, then sluices, dismantling connection, envelope
Close pressure testing mouth.
Above-mentioned utility model realizes the bulge test inside pipeline using simple device, and easy to operate, cost is low, but
It is that the said equipment is applied to small pipeline, when testing large-scale pipeline, it is necessary to be divided into countless sections of progress, known clearly to test tape
Trouble, experiment are also inaccurate.
Therefore, urgently a kind of new test method, reasonable selection water pressure test section and filling opening, reasonable selection are tried now
Test pressure, the design and construction method to plug and parados improves, determine the program of the water pressure test, improve the water pressure test
Success rate, pipeline quality is checked and accepted and safe operation plays vital effect, while reasonably utilize resource, also certain
Investment has been saved in degree；In addition, reducing water pressure test number, solve the produced problem in engineering in time, reduce to applying
The successional influence of work, investment can be reduced with accelerating construction progress.
The content of the invention
The purpose of the present invention is in view of the shortcomings of the prior art, there is provided a kind of PCCP hydraulic test of pipeline method, including：
(1) pipe joint is fully completed joint bulge test three times, and joint bulge test step is：
(1.1) first time joint suppresses inspection,
The water inlet pore pressure water of (1.1.1) by force (forcing) pump from joint bottom, upper discharge hole exhaust；
(1.1.2) exhaust tightens bolt after terminating, and is forced into 0.6MPa, keeps 5min pressure not decline, as qualified；
(1.2) second of joint suppress inspection,
Often after the section of installation 3 PCCP pipelines, second of joint should be carried out to first pipeline joint-seam of described 3 section PCCP pipes and beaten
Pressure is examined, and method is the same as (1.1)；
(1.3) third time joint suppresses inspection,
Third time joint is suppressed inspection and carried out after the completion of tube top backfill, and the method for inspection is the same as (1.1)；
(1.4) will be cleaned up after bulge test three times is qualified in pipeline；
(2) exhaust on the communicating valve and test section of adjacent two test section chosen according to the pressure of the bulge test
Valve, gate valve be respectively mounted finish and by interim acceptance after, close the communicating valve and the gate valve, open the air bleeding valve；
(3) pipeline annex reaches the 100% of design strength, and pipeline is backfilled to design altitude and top backfill height
At least 1.5m.
(4) test section is all open tight using the closure of steel blank flange；
(5) according to test pressure and field working conditions reasonable selection closure plate (steel plate) specification and thrust anchor block structure, with
Ensure enough safety coefficients, using closure plate inside the mouth of pipe of test pipe both ends sealing, and according to test pressure after closure plate
The reinforcement measure that the back of the body is supported using channel-section steel or I-steel in cruciform symmetry welding；
(6) draining pump and generator are equipped with so that discharge outlet is unimpeded；
(7) pressure testing equipment, pressure gauge, connecting tube, blast pipe, water inlet pipe and pipe fitting are checked, it is ensured that system tightness, and examine
The firm supporting degree looked at the elbow and threeway of test pipe；
(8) relative elevation highest section as the first test section, gives test section water filling in test section；
(9) it is exhausted in water-filling stage, the valve welded by three passage ports on high point air bleeding valve and steel bridgeware,
By all Exhaust Opens before water-filling, full of being turned off after water；
(10) in the hydrostatic pressing stage, the high point air bleeding valve valve that three passage ports weld on exhaust and steel bridgeware automatically is passed through
Door carries out manual exhaust；
(11) test pipe hydrostatic test and record are carried out using water flood,
(11.1) test method is that relative elevation highest section is minimum to relative elevation as the first test section from test section
Duan Yici is carried out, and after each section of pass the test, water is put into next test section by communicating valve and tested；
(11.2) water pressure test step is:
Valve water filling into pipeline that (11.2.1) is welded using hydraulic test pump by three passage ports on steel bridgeware, classification
Boosting, be 0.2MPa per stage pressure, no less than 15 minutes, check test pipeline section whether there is leakage for voltage stabilizing after every liter of one-level；
(11.2.2) boosts to design requirement pressure,
Pressure starts timing after rising to test pressure, keeps duct test pressure constant when reaching 0.03MPa to pressure, permanent
Pressure perdurabgility must not be less than 2h, and measure the water filled into constant voltage time in test section；
(11.3) test data sheet
(11.3.1) starts voltage stabilizing after test pressure is risen to, and record starts voltage stabling control T1, keeps pressure 15min, and
Pressure drop is no more than 0.03MPa, record end voltage stabling control T2；
(11.3.2) opens high-pressure hydraulic pump, and into pipeline, moisturizing boosts to test pressure again, and records the moisturizing into pipeline
W is measured, water injection rate is measured by digital water meter；
(11.3.3) calculates pipeline seepage discharge such as following formula (1) according to data above：
Q=W/ (T2-T1) L ... (1)
Wherein, Q- pipelines seepage discharge (L/minkm)
W-15min rate of water make-ups (L)
T1- voltage stabilizing time started (min)
The T2- voltage stabilizing 15min end times (min)
L- water pressure tests segment length (km).
Further, in step (1), replaced with gas pressure test.
Further, the communicating valve in step (2) includes gate valve and butterfly valve.
Further, the pressure testing equipment in step (7) sets ball-and-seat.
Further, the accuracy class of the pressure gauge in step (7) is 1.5 grades.
Further, in step (11), during voltage stabilizing, when the pressure drops, the moisturizing into pipeline.
Beneficial effects of the present invention are：
The new Hydraulic test technique of PCCP pipelines shortens the test period in application process, reduces temporary facility and abandon
Water, while obtain very big economic benefit.
Embodiment
With reference to embodiment, the present invention is further illustrated.
Embodiment one
Methods described, including：
(1) pipe joint is fully completed joint bulge test three times, and joint bulge test step is：
(1.1) first time joint suppresses inspection,
The water inlet pore pressure water of (1.1.1) by force (forcing) pump from joint bottom, upper discharge hole exhaust；
(1.1.2) exhaust tightens bolt after terminating, and is forced into 0.6MPa, keeps 5min pressure not decline, as qualified；
Also pneumatic test, the same hydraulic test of pneumatic test pressure, voltage stabling control can be used instead after Project Surveillance approval.
(1.2) second of joint suppress inspection,
Often after the section PCCP of installation 3 pipelines 6, second of joint should be carried out to first tube seam of described 3 section PCCP pipelines 6
Inspection is suppressed, method is the same as (1.1)；
(1.3) third time joint suppresses inspection,
Third time joint is suppressed inspection and carried out after the completion of tube top backfill, and the method for inspection is the same as (1.1)；
(1.4) will be cleaned up after bulge test three times is qualified in pipeline；
(2) exhaust on the communicating valve and test section of adjacent two test section chosen according to the pressure of the bulge test
Valve, gate valve be respectively mounted finish and by interim acceptance after, close the communicating valve (gate valve, butterfly valve) and the gate valve, open institute
State air bleeding valve；
(3) pipeline annex reaches the 100% of design strength, and pipeline is backfilled to design altitude and top backfill height
At least 1.5m；
(4) test section is all open tight using the closure of steel blank flange；
(5) according to test pressure and field working conditions reasonable selection closure plate (steel plate) specification and thrust anchor block structure, with
Ensure enough safety coefficients.Using closure plate inside the mouth of pipe of test pipe both ends sealing, and according to test pressure after closure plate
The reinforcement measure that the back of the body is supported using channel-section steel or I-steel in cruciform symmetry welding；
(6) draining pump and generator are equipped with so that discharge outlet is unimpeded；
(7) pressure testing equipment, pressure gauge (1.5 grades of precision), connecting tube, blast pipe, water inlet pipe and pipe fitting are checked, it is ensured that system
Tightness, and the firm supporting degree at the elbow of checkout facility pipeline and threeway；
The pressure testing equipment passes through the qualified special equipment of professional detection department calibration, sets ball-and-seat, water-filling and beats
Allow for ensureing the stabilization of hydraulic pressure in pressure pressurization；
(8) relative elevation highest section as the first test section, gives test section water filling in test section；
(9) it is exhausted in water-filling stage, the valve welded by three passage ports on high point air bleeding valve and steel bridgeware,
By all Exhaust Opens before water-filling, full of being turned off after water；
(10) in the hydrostatic pressing stage, the high point air bleeding valve valve that three passage ports weld on exhaust and steel bridgeware automatically is passed through
Door carries out manual exhaust；
(11) test pipe hydrostatic test and record are carried out using water flood,
(11.1) test method is that relative elevation highest section is minimum to relative elevation as the first test section from test section
Duan Yici is carried out, and after each section of pass the test, water is put into next test section by communicating valve and tested；
(11.2) water pressure test step is:
Valve water filling into pipeline that (11.2.1) is welded using hydraulic test pump by three passage ports on steel bridgeware, classification
Boosting, be 0.2MPa per stage pressure, voltage stabilizing no less than 15 minutes (for holding pressure, it is allowed to the moisturizing into pipe) after every liter of one-level,
Check test pipeline section whether there is leakage, can continue to boost when situation is normal；
(11.2.2) boosts to design requirement pressure,
Pressure starts timing after rising to test pressure, keeps duct test pressure constant when reaching 0.03MPa to pressure, permanent
Pressure perdurabgility must not be less than 2h, and measure the water filled into constant voltage time in test section；
(11.3) test data sheet
(11.3.1) starts voltage stabilizing after test pressure is risen to, and record starts voltage stabling control T1, keeps pressure 15min, and
Pressure drop is no more than 0.03MPa, record end voltage stabling control T2；
(11.3.2) opens high-pressure hydraulic pump, and into pipeline, moisturizing boosts to test pressure again, and records the moisturizing into pipeline
W is measured, water injection rate is measured by digital water meter；
(11.3.3) calculates pipeline seepage discharge according to data above, and pipeline seepage discharge is calculated according to formula (1)：
Q=W/ (T2-T1) L ... (1)
Wherein, Q- pipelines seepage discharge (L/minkm)
W-15min rate of water make-ups (L)
T1- voltage stabilizing time started (min)
The T2- voltage stabilizing 15min end times (min)
L- water pressure tests segment length (km).
Further, in step (11), during voltage stabilizing, when the pressure drops, the moisturizing into pipeline.
The present invention is not limited to above-mentioned embodiment, in the case of without departing substantially from substantive content of the present invention, art technology
Any deformation, improvement, the replacement that personnel are contemplated that each fall within protection scope of the present invention.
Claims (6)
- A kind of 1. PCCP hydraulic test of pipeline method, it is characterised in that comprise the following steps：(1) pipe joint is fully completed joint bulge test three times, and joint bulge test step is：(1.1) first time joint suppresses inspection,The water inlet pore pressure water of (1.1.1) by force (forcing) pump from joint bottom, upper discharge hole exhaust；(1.1.2) exhaust tightens bolt after terminating, and is forced into 0.6MPa, keeps 5min pressure not decline, as qualified；(1.2) second of joint suppress inspection,Often after the section of installation 3 PCCP pipes, second of joint should be carried out to first tube seam of described 3 section PCCP pipes and suppress inspection, Method is the same as (1.1)；(1.3) third time joint suppresses inspection,Third time joint is suppressed inspection and carried out after the completion of tube top backfill, and the method for inspection is the same as (1.1)；(1.4) will be cleaned up after bulge test three times is qualified in pipeline；(2) air bleeding valve on the communicating valve and test section of adjacent two test section chosen according to the pressure of the bulge test, lock Valve be respectively mounted finish and by interim acceptance after, close the communicating valve and the gate valve, open the air bleeding valve；(3) pipeline annex reaches the 100% of design strength, and pipeline is backfilled to design altitude and top backfills height at least For 1.5m；(4) test section is all open tight using the closure of steel blank flange；(5) according to test pressure and field working conditions reasonable selection closure plate specification and thrust anchor block structure, to ensure enough Safety coefficient, using closure plate inside the mouth of pipe of test pipe both ends sealing, and channel-section steel is used in closure plate back according to test pressure Or I-steel is in the reinforcement measure of cruciform symmetry welding support；(6) draining pump and generator are equipped with so that discharge outlet is unimpeded；(7) pressure testing equipment, pressure gauge, connecting tube, blast pipe, water inlet pipe and pipe fitting are checked, it is ensured that system tightness, and check examination The firm supporting degree tested at the elbow and threeway of pipeline；(8) relative elevation highest section as the first test section, gives test section water filling in test section；(9) it is exhausted in water-filling stage, the valve welded by three passage ports on high point air bleeding valve and steel bridgeware, water-filling It is preceding by all Exhaust Opens, full of being turned off after water；(10) enter in hydrostatic pressing stage, the valve welded by three passage ports on the automatic exhaust of high point air bleeding valve and steel bridgeware Row manual exhaust；(11) test pipe hydrostatic test and record are carried out using water flood,(11.1) test method is, from test section relative elevation highest section as the first test section to relative elevation lowest segment according to Secondary progress, after each section of pass the test, water is put into next test section by communicating valve and tested；(11.2) water pressure test step is：Valve water filling into pipeline that (11.2.1) is welded using hydraulic test pump by three passage ports on steel bridgeware, classification rise Pressure, be 0.2MPa per stage pressure, no less than 15 minutes, check test pipeline section whether there is leakage for voltage stabilizing after every liter of one-level；(11.2.2) boosts to design requirement pressure,Pressure starts timing after rising to test pressure, and holding duct test pressure is constant when reaching 0.03MPa to pressure, and constant pressure is prolonged The continuous time must not be less than 2h, and measure the water filled into constant voltage time in test section；(11.3) test data sheet(11.3.1) starts voltage stabilizing after test pressure is risen to, and record starts voltage stabling control T1, keeps pressure 15min, and pressure drop No more than 0.03MPa, record end voltage stabling control T2；(11.3.2) opens high-pressure hydraulic pump, and into pipeline, moisturizing boosts to test pressure again, and records the rate of water make-up W into pipeline, Water injection rate is measured by digital water meter；(11.3.3) calculates pipeline seepage discharge according to data above, and pipeline seepage discharge is calculated according to formula (1)：Q=W/ (T2-T1) L ... (1)Wherein, Q- pipelines seepage discharge (L/minkm)W-15min rate of water make-ups (L),T1- voltage stabilizing time started (min),The T2- voltage stabilizing 15min end times (min),L- water pressure tests segment length (km).
- 2. according to the method for claim 1, it is characterised in that in step (1), replaced with gas pressure test.
- 3. according to the method for claim 1, it is characterised in that the communicating valve in step (2) includes gate valve and butterfly valve.
- 4. according to the method for claim 1, it is characterised in that the pressure testing equipment in step (7) sets ball-and-seat.
- 5. according to the method for claim 1, it is characterised in that the accuracy class of the pressure gauge in step (7) is 1.5 Level.
- 6. according to the method for claim 1, it is characterised in that in step (11), during voltage stabilizing, when pressure declines When, the moisturizing into pipeline.
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| CN108871514A (en) * | 2018-08-01 | 2018-11-23 | 三川智慧科技股份有限公司 | A kind of water meter suppresses equipment and its application method with simulation water hammer automatically |
| CN108980632A (en) * | 2018-07-04 | 2018-12-11 | 安徽原上草节能环保科技有限公司 | A kind of detection device for pipe leakage |
| CN109027701A (en) * | 2018-07-04 | 2018-12-18 | 安徽原上草节能环保科技有限公司 | A kind of municipal sewers leak hunting method |
| CN109764944A (en) * | 2019-03-04 | 2019-05-17 | 常州市成丰流量仪表有限公司 | The full-automatic pressure testing device of electromagnetic flowmeter and pressure-measuring method |
| CN110207900A (en) * | 2019-06-17 | 2019-09-06 | 湖南省宝满科技开发有限公司 | The tube expansion detection method of heat-conducting copper pipe in a kind of fan coil |
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| CN112665993A (en) * | 2020-12-17 | 2021-04-16 | 湖州市特种设备检测研究院 | Automatic control device and method for hydrostatic test |
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| 杨进新 等: "长距离大口径PCCP管道水压试验方法改进研究", 《水利水电技术》 * |
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| CN110608952A (en) * | 2019-10-08 | 2019-12-24 | 云南大红山管道有限公司 | Hydraulic test system and test method applied to large-diameter conveying pipeline |
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| CN112665993A (en) * | 2020-12-17 | 2021-04-16 | 湖州市特种设备检测研究院 | Automatic control device and method for hydrostatic test |
| CN113776952A (en) * | 2021-09-01 | 2021-12-10 | 武汉市政工程设计研究院有限责任公司 | Functional test method for long-distance large-caliber deep drainage tunnel and application |
| CN113776952B (en) * | 2021-09-01 | 2024-06-11 | 武汉市政工程设计研究院有限责任公司 | Functional test method for long-distance large-caliber deep drainage tunnel and application |
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