CN107478400A - Pressure testing device and its method a kind of while that detect multiple valves - Google Patents

Pressure testing device and its method a kind of while that detect multiple valves Download PDF

Info

Publication number
CN107478400A
CN107478400A CN201710951038.0A CN201710951038A CN107478400A CN 107478400 A CN107478400 A CN 107478400A CN 201710951038 A CN201710951038 A CN 201710951038A CN 107478400 A CN107478400 A CN 107478400A
Authority
CN
China
Prior art keywords
valve
pressure
detected
pressure testing
multiple valves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710951038.0A
Other languages
Chinese (zh)
Inventor
刘丽佳
吴建勇
孙国安
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Excellent Fluid Control Technology Co Ltd
Original Assignee
Suzhou Excellent Fluid Control Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzhou Excellent Fluid Control Technology Co Ltd filed Critical Suzhou Excellent Fluid Control Technology Co Ltd
Priority to CN201710951038.0A priority Critical patent/CN107478400A/en
Publication of CN107478400A publication Critical patent/CN107478400A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating 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
    • G01M3/28Investigating 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
    • G01M3/2876Investigating 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 valves
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12Pressure testing
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014Type of force applied
    • G01N2203/0016Tensile or compressive
    • G01N2203/0019Compressive
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003Generation of the force
    • G01N2203/0042Pneumatic or hydraulic means
    • G01N2203/0048Hydraulic means

Abstract

The invention discloses a kind of while detect the pressure testing device and its method of multiple valves, wherein pressure testing device includes control cabinet, partial pressure test system and pressure testing table, partial pressure test system is by a pressure distributor, and a plurality of pressure testing separated time composition being connected with pressure distributor, the pressure testing separated time has stop valve, pressure gauge and the reversal valve being sequentially connected with by the first pipeline, and one end of first pipeline is connected with pressure distributor.Pressure-measuring method comprises the following steps:Installation valve, open stop valve and medium is inputted into inner chamber to multiple valves to be detected through pressure distributor, enters to press voltage stabilizing to test.The present invention can be independently controlled to each valve to be detected, once finding seepage, as long as closing the stop valve of the leakage valve front end, would not influence the continuation pressure testing of other valves, be laid a good foundation to save disassembly and assembly time.In addition, the present invention greatly reduces waste of the water resource during pressure testing, streamline operation, there is the advantages of raising production efficiency, reduction production cost.

Description

Pressure testing device and its method a kind of while that detect multiple valves
Technical field
The present invention relates to oil recovery/gaseous control head field, more particularly to pressure testing device that is a kind of while detecting multiple valves And its method.
Background technology
In API6A oil recoveries/gas wellhead equipment field, valve is indispensable part.It is well known that valve rises To the effect for turning on or blocking fluid media (medium) and pass through, because the reliability of valve is directly connected to whole oil recovery/gas production wellhead dress Put whether can normal operation, therefore need before dispatching from the factory to carry out hydrostatic pressing intensity detection, hydrostatic means of press seals to each valve Performance test or airtight testing sealing, to judge whether valve is qualified.
Currently, when carrying out hydrostatic test, the equipment of needs is set by hydraulic test pump (low-lift pump, high-pressure pump), water tank, record Standby, pressure gauge, high pressure line, blind flange, pressure testing room, screw bolt and nut etc. form.When carrying out airtight testing sealing, it is necessary to set For by air compressor machine, cooling driers and filter, nitrogen cylinder, two-stage gas booster pump, pond, recording equipment, pressure gauge, high-voltage tube Line, blind flange, melt pit, screw bolt and nut etc. form.Because the Meteorological of test room and melt pit is especially high, in general factory is difficult To undertake.Other existing way there is problems:
1st, from the detection time of valve, in API6A specification, the detection to valve has special regulation, The regulation be by user to condition determine manufacture requirements, that is to say, that select API6A in PSL1, PSL2, PSL3, PSL3G, PSL4 is detected, and different manufactures requirement is different in detection time.So that PSL3 manufactures require as an example, a valve Detection time take around 120 minutes, calculated by 8 hours within one day, can only also complete the detection of 4 valves, it is such Speed obviously can not meet user's request.
2nd, from the detection method of valve, the general method that a deck valve door is detected using a set of equipment, exactly utilize Hydraulic test pump is connected to valve one end by high pressure line, and to valve cavity injected media, detection operation is carried out using control device. The above method is relatively backward for the enterprise for producing valve in enormous quantities, and the detection efficiency of daily separate unit detection device extremely has Limit, efficiency are very low.
3rd, from the detection efficiency of valve, because valve is to produce in enormous quantities, it is very big to detect the workload of valve, So the method for detection is particularly important.The detection of valve is the process repeated, it is meant that on each deck valve door will repeat Operation is stated, if the method for detection does not change, its detection efficiency does not increase.
The content of the invention
In order to overcome above mentioned problem, an object of the present invention is to provide pressure testing dress that is a kind of while detecting multiple valves Put, solve the problems, such as that existing pressure testing device detection efficiency is not high.
It is a further object to provide a kind of while detect the pressure-measuring method of multiple valves, solves existing method inspection Survey the problem of cost is high, and intensity is big, and detection efficiency is low.
The technical solution adopted for the present invention to solve the technical problems is:Pressure testing dress that is a kind of while detecting multiple valves Put, for carrying out hydrostatic pressing intensity detection and hydrostatic pressing experiments of sealing performance, including control cabinet, partial pressure test to valve to be detected System and pressure testing table.Wherein, control cabinet is used to provide stable pressure of supply water to partial pressure test system, and it includes what is adjoined one another Water tank and hydraulic test pump, the tape deck for recording all valve datas to be detected is also associated with hydraulic test pump.Partial pressure is tested System is by a pressure distributor, and a plurality of pressure testing separated time composition being connected with pressure distributor, the pressure testing separated time have Stop valve, pressure gauge and the reversal valve being sequentially connected with by the first pipeline, one end of first pipeline are connected with pressure distributor, The other end connects with valve to be detected, and the second pipeline is additionally provided between pressure distributor and hydraulic test pump.Pressure testing table has two sets Valve clamping bench group, every suit valve clamping bench group are respectively arranged with the valve clamping bench corresponding with valve quantity to be detected. Preferably, pressure testing separated time is provided with five.The present invention can detect five valves in the unit interval, substantially increase work effect Rate, user's request can be met.
Further, pressure testing separated time is also included for when hydrostatic pressing intensity detection is tested that the valve other end to be detected is close The blind flange of envelope, the blind flange are unwanted in hydrostatic pressing experiments of sealing performance.
Further, the screw bolt and nut for installing valve to be detected is additionally provided with valve clamping bench.
As another theme of the present invention, pressure-measuring method that is a kind of while detecting multiple valves, filled using above-mentioned pressure testing Put, comprise the following steps:S1. by valve to be detected be arranged on a set of valve clamping bench group on, and by one end of the first pipeline with Valve valve port docks;S2. stop valve is opened, valve to be detected is opened or closed by testing requirements, pressure testing is started by control cabinet Medium is pumped into pressure distributor by pump, is inputted medium to the inner chamber of multiple valves to be detected simultaneously by pressure distributor; S3. if any valve to be detected finds seepage during pressure is entered, then the stop valve of the valve nose is directly closed, it is other to treat Detection valve can continue into be depressed into complete detection;S4. when pressure reaches the pressure value of setting, hydraulic test pump pump trip is to be checked Side valve door carries out voltage stabilizing by API6A requirements, and valve to be detected is not allow for any seepage during voltage stabilizing;If filled in record Display seepage is put, then closes the stop valve of each pressure testing separated time respectively, whether observation corresponding pressure table has decompression, if any drop Pressure, illustrates that the valve to be detected of the pressure testing separated time is unqualified;S5. after the completion of detecting, by reversal valve by pressure transmission to another Set valve clamping bench group separately detects, and can dismantle the valve that above a set of detection is completed simultaneously in separately detection process.
Further, when carrying out the experiment of hydrostatic pressing intensity detection, in addition to blind flange is arranged on valve to be detected The other end outlet the step of.
Beneficial effects of the present invention:
The present invention can be independently controlled to each valve to be detected, once seepage is found, as long as closing the leak valve The stop valve held in front of the door, the continuation pressure testing of other valves would not be influenceed, be laid a good foundation to save disassembly and assembly time.It is of the invention big The big waste for reducing water resource during pressure testing, streamline operation, has and improves production efficiency, reduce the excellent of production cost Point.The present invention detects multiple valves in the unit interval, substantially increases operating efficiency, so that PSL3 manufactures require as an example, per complete Into 5 valves detection with about when 120 minutes, in terms of 8 hours, the detection of 20 valves can be completed within one day, and then significantly Reduce the testing cost of valve and the labor intensity of worker.In addition, can be in detection valve using two sets of valve clamping bench groups The valve of another set of valve clamping bench group is removed and installed simultaneously, ensure that the continuity of work.
Below with reference to drawings and examples, the present invention is described in detail.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Embodiment
Embodiment,
Referring to Fig. 1, pressure testing device that is a kind of while detecting multiple valves, including control cabinet 1, partial pressure test system and examination Present a theatrical performance as the last item on a programme 4.
Wherein, control cabinet 1 is used to provide stable pressure of supply water to partial pressure test system, and it includes the water tank to adjoin one another And hydraulic test pump, the tape deck for recording all valve datas to be detected is also associated with hydraulic test pump.Above-mentioned water tank, pressure testing Pump, tape deck are completely integrated in control cabinet 1, and control cabinet is provided with guidance panel, on demand can be enterprising in guidance panel Row operation.
Partial pressure test system is by a pressure distributor 2, and five pressure testing separated time groups being connected with pressure distributor 2 Into the pressure testing separated time has stop valve 11, pressure gauge 10 and the reversal valve 12 being sequentially connected with by the first pipeline 3, first pipe One end of line 3 is connected with pressure distributor 2, and the other end connects with valve 7 to be detected.In the examination of pressure distributor 2 and control cabinet 1 The second pipeline 13 is additionally provided between press pump.Above-mentioned pressure testing separated time also include be used for will be to be detected when hydrostatic pressing intensity detection is tested The blind flange 6 of the other end of valve 7 sealing, the blind flange 6 is unwanted in hydrostatic pressing experiments of sealing performance.
Pressure testing table 4 has two sets of valve clamping bench groups, and every suit valve clamping bench group is respectively arranged with and valve to be detected The corresponding valve clamping bench 5 of quantity.The bolt 8 and nut 9 for installing valve to be detected are additionally provided with valve clamping bench 5.
The application method of pressure testing device that is foregoing while detecting multiple valves will be illustrated below.
Pressure-measuring method that is a kind of while detecting multiple valves, comprises the following steps:
S1. by 5 valves 7 to be detected be arranged on a set of valve clamping bench group on, and by one end of the first pipeline 3 with it is corresponding The valve port docking of valve.
S2. stop valve 11 is opened, valve 7 to be detected is opened or closed by testing requirements, hydraulic test pump is started by control cabinet 1 Medium is pumped into pressure distributor 2, inputted medium to the inner chamber of multiple valves 7 to be detected simultaneously by pressure distributor 2.
S3. if any valve to be detected 7 finds seepage during pressure is entered, then the cut-off of the valve nose is directly closed Valve 11, other valves 7 to be detected can continue into be depressed into complete detection.
S4. when pressure reaches the pressure value of setting, hydraulic test pump pump trip, valve 7 to be detected is carried out by API6A requirements Voltage stabilizing, valve 7 to be detected is not allow for any seepage during voltage stabilizing.If showing seepage in tape deck, close respectively The stop valve 11 of each pressure testing separated time is closed, whether observation corresponding pressure table has decompression, if any decompression, illustrate the pressure testing separated time Valve 7 to be detected is seepage, and the pressure releasing of other 4 valves 7 to be detected need not be fallen by such case occur, Ke Yiji Continuous detection, but need ftercompction to required pressure and continue to close the stop valve 11 of leakage valve front end.
S5. after the completion of detecting, pressure transmission is separately detected to another set of valve clamping bench group by reversal valve 12, another The valve that above a set of detection is completed can be dismantled in row detection process simultaneously.
Further, when carrying out the experiment of hydrostatic pressing intensity detection, in addition to blind flange 6 is arranged on valve to be detected The step of 7 other end outlet.
Described above is only the preferred embodiment to invention, and not the scope of invention is defined, therefore is not departing from this On the premise of invention design spirit, what those of ordinary skill in the art were done to construction, feature and principle of the present invention etc. Effect change or decoration, all should fall within the scope of protection of the present invention.

Claims (6)

1. pressure testing device that is a kind of while detecting multiple valves, for carrying out hydrostatic pressing intensity detection and hydrostatic to valve to be detected Means of press seals performance test, including control cabinet, it is characterised in that:Also include partial pressure test system and pressure testing table;
The control cabinet is used to provide stable pressure of supply water to partial pressure test system, and it includes the water tank to adjoin one another and pressure testing Pump, the tape deck for recording all valve datas to be detected is also associated with hydraulic test pump;
The partial pressure test system is by a pressure distributor, and a plurality of pressure testing separated time group being connected with pressure distributor Into the pressure testing separated time has stop valve, pressure gauge and the reversal valve being sequentially connected with by the first pipeline, one end of first pipeline It is connected with pressure distributor, the other end connects with valve to be detected, and the second pipe is additionally provided between pressure distributor and hydraulic test pump Line;
The pressure testing table has two sets of valve clamping bench groups, and every suit valve clamping bench group is respectively arranged with and valve number to be detected Measure corresponding valve clamping bench.
2. detect the pressure testing device of multiple valves simultaneously as claimed in claim 1, it is characterised in that:The pressure testing separated time also includes For the blind flange for sealing the valve other end to be detected when hydrostatic pressing intensity detection is tested.
3. detect the pressure testing device of multiple valves simultaneously as claimed in claim 1, it is characterised in that:On the valve clamping bench also Provided with the screw bolt and nut for installing valve to be detected.
4. detect the pressure testing device of multiple valves simultaneously as described in any one of claims 1 to 3, it is characterised in that:The pressure testing Separated time is provided with five.
5. pressure-measuring method that is a kind of while detecting multiple valves, using the pressure testing device of such as any one of Claims 1-4, it is special Sign is, comprises the following steps:
S1. valve to be detected is arranged in a set of valve clamping bench group, and one end of the first pipeline is docked with valve valve port;
S2. stop valve is opened, valve to be detected is opened or closed by testing requirements, hydraulic test pump is started by medium pump by control cabinet Enter in pressure distributor, inputted medium to the inner chamber of multiple valves to be detected simultaneously by pressure distributor;
S3. if any valve to be detected finds seepage during pressure is entered, then the stop valve of the valve nose is directly closed, its Its valve to be detected can continue into be depressed into complete detection;
S4. when pressure reaches the pressure value of setting, hydraulic test pump pump trip, valve to be detected carries out voltage stabilizing by API6A requirements; If showing seepage in tape deck, the stop valve of each pressure testing separated time is closed respectively, and whether observation corresponding pressure table has drop Pressure, if any decompression, illustrates that the valve to be detected of the pressure testing separated time is unqualified;
S5. after the completion of detecting, pressure transmission is separately detected to another set of valve clamping bench group by reversal valve, separately detected During can dismantle simultaneously above it is a set of detection complete valve.
6. detect the pressure testing device of multiple valves simultaneously as claimed in claim 5, it is characterised in that:Carrying out hydrostatic pressing intensity inspection Test is when testing, the step of including for blind flange being arranged on the other end outlet of valve to be detected.
CN201710951038.0A 2017-10-13 2017-10-13 Pressure testing device and its method a kind of while that detect multiple valves Pending CN107478400A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710951038.0A CN107478400A (en) 2017-10-13 2017-10-13 Pressure testing device and its method a kind of while that detect multiple valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710951038.0A CN107478400A (en) 2017-10-13 2017-10-13 Pressure testing device and its method a kind of while that detect multiple valves

Publications (1)

Publication Number Publication Date
CN107478400A true CN107478400A (en) 2017-12-15

Family

ID=60605138

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710951038.0A Pending CN107478400A (en) 2017-10-13 2017-10-13 Pressure testing device and its method a kind of while that detect multiple valves

Country Status (1)

Country Link
CN (1) CN107478400A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108279118A (en) * 2017-12-25 2018-07-13 中海油研究总院有限责任公司 Subsea production tree tests system
CN108918042A (en) * 2018-05-31 2018-11-30 浙江省天正设计工程有限公司 A kind of rapidly and efficiently value pressure test method and device
CN109443745A (en) * 2018-10-18 2019-03-08 合肥合茂电子科技有限公司 A kind of valve strength detection platform
CN109855813A (en) * 2019-01-10 2019-06-07 上海盛韬半导体科技有限公司 Integrate the simple detection device and its operation method of pressure maintaining and helium leak check
CN112985803A (en) * 2021-03-30 2021-06-18 徐工消防安全装备有限公司 Fire fighting truck valve detection device and method thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200982913Y (en) * 2006-09-28 2007-11-28 比亚迪股份有限公司 A detection device of secure valve start pressure
US20110100096A1 (en) * 2009-11-03 2011-05-05 General Electric Company Method and System for Fluid Valve Leak Detection
CN202453152U (en) * 2012-02-25 2012-09-26 山东省特种设备检验研究院济宁分院 Multichannel multi-purpose motor-driven movable hydraulic pressure test system
CN103017981A (en) * 2012-12-22 2013-04-03 厦门船舶重工股份有限公司 Pipeline tightness pressure testing device
CN203869851U (en) * 2014-05-05 2014-10-08 广东省工业设备安装公司 Valve-detecting apparatus
CN204128762U (en) * 2014-09-24 2015-01-28 济南蓝信电子设备有限公司 A kind of valve examination platform
CN106441738A (en) * 2016-08-23 2017-02-22 岳阳筑盛阀门管道有限责任公司 Efficient angle valve pressure test device
CN207280704U (en) * 2017-10-13 2018-04-27 苏州优力克流体控制科技有限公司 Pressure testing device that is a kind of while detecting multiple valves

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200982913Y (en) * 2006-09-28 2007-11-28 比亚迪股份有限公司 A detection device of secure valve start pressure
US20110100096A1 (en) * 2009-11-03 2011-05-05 General Electric Company Method and System for Fluid Valve Leak Detection
CN202453152U (en) * 2012-02-25 2012-09-26 山东省特种设备检验研究院济宁分院 Multichannel multi-purpose motor-driven movable hydraulic pressure test system
CN103017981A (en) * 2012-12-22 2013-04-03 厦门船舶重工股份有限公司 Pipeline tightness pressure testing device
CN203869851U (en) * 2014-05-05 2014-10-08 广东省工业设备安装公司 Valve-detecting apparatus
CN204128762U (en) * 2014-09-24 2015-01-28 济南蓝信电子设备有限公司 A kind of valve examination platform
CN106441738A (en) * 2016-08-23 2017-02-22 岳阳筑盛阀门管道有限责任公司 Efficient angle valve pressure test device
CN207280704U (en) * 2017-10-13 2018-04-27 苏州优力克流体控制科技有限公司 Pressure testing device that is a kind of while detecting multiple valves

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108279118A (en) * 2017-12-25 2018-07-13 中海油研究总院有限责任公司 Subsea production tree tests system
CN108918042A (en) * 2018-05-31 2018-11-30 浙江省天正设计工程有限公司 A kind of rapidly and efficiently value pressure test method and device
CN109443745A (en) * 2018-10-18 2019-03-08 合肥合茂电子科技有限公司 A kind of valve strength detection platform
CN109855813A (en) * 2019-01-10 2019-06-07 上海盛韬半导体科技有限公司 Integrate the simple detection device and its operation method of pressure maintaining and helium leak check
CN109855813B (en) * 2019-01-10 2024-04-19 上海盛韬半导体科技有限公司 Simple detection device integrating pressure maintaining and helium leakage detection and operation method thereof
CN112985803A (en) * 2021-03-30 2021-06-18 徐工消防安全装备有限公司 Fire fighting truck valve detection device and method thereof

Similar Documents

Publication Publication Date Title
CN107478400A (en) Pressure testing device and its method a kind of while that detect multiple valves
US20200217193A1 (en) Mineshaft-stratum fracture coupled flowing simulation experiment device and method
CN105605033B (en) Self contained pressure compensating system and its pressure monitoring method
CN204128762U (en) A kind of valve examination platform
CN107631973B (en) Multi-method same-machine testing device for permeability measurement of ultra-low permeability rock sample
CN206019960U (en) Lift non-return valve work seal detection means
CN104373106A (en) Experimental method and experimental system of gas sealing performance of underground packer
CN107063649B (en) The underwater wellhead annular space sealing ground test device of pressurization can be loaded simultaneously
CN207280704U (en) Pressure testing device that is a kind of while detecting multiple valves
CN104122048A (en) High-pressure gas tightness detection system
CN203349990U (en) Hydraulic-pressure seal testing machine
WO2021133662A1 (en) Mechanical seal testing
CN205138771U (en) Detection apparatus for constant pressure valve
CN109470426B (en) Door and window air tightness detection equipment
CN106546394A (en) The system and its using method of leak source are detected and are looked for for motor controller sealing property
CN108213943B (en) Intelligent valve assembly test machine
CN113418851A (en) Seepage flow detection tester
CN206311283U (en) The system for being detected for motor controller sealing property and looking for leak source
CN204556178U (en) A kind of subsurface safety valve test macro
JPS628033A (en) Method for detecting leakage of piping
CN104729838A (en) Device and method for achieving cold rolling mill fine cooling spraying beam off-line testing
CN103134646B (en) The watertightness detection system of pipeline and detection method thereof
CN107642343A (en) A kind of Oil/gas Well freezing bridging plug is with pressure to change valve construction technology
CN108871688A (en) A kind of test-run a machine rack intercooler cooling line leakage detection method
CN203532866U (en) High-low pressure test valve of blowout preventer

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20171215

RJ01 Rejection of invention patent application after publication