CN106092759A - A kind of hydrostatic test special tooling and hydrostatic test method - Google Patents
A kind of hydrostatic test special tooling and hydrostatic test method Download PDFInfo
- Publication number
- CN106092759A CN106092759A CN201610634598.9A CN201610634598A CN106092759A CN 106092759 A CN106092759 A CN 106092759A CN 201610634598 A CN201610634598 A CN 201610634598A CN 106092759 A CN106092759 A CN 106092759A
- Authority
- CN
- China
- Prior art keywords
- test
- main body
- pressure
- frock main
- frock
- 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
Links
Classifications
-
- 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
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of hydrostatic test special tooling and hydrostatic test method, including frock main body, it is provided with upper cover in frock main body, frock bottom part body is provided with support, it is provided with water inlet in frock main body, air vent, discharge outlet and Pressure gauge connector, water inlet connects liquid delivery tube, Pressure gauge connector connects Pressure gauge, liquid delivery tube connects back-up valve and motor test pump, described frame bottom is provided with regulation foot, seal groove is had in frock main body, the potted component of coupling is placed in seal groove, and the safety to hydrostatic test, reliable method.By designing and using corresponding hydrostatic test method, the hydrostatic test of product to be measured can be realized safely and reliably, and then reach to fully understand the purpose of product actual static load load performance, for promoting to bear the larger axis product to be measured to pressure, detection accurately and reliably, scientific research and the engineer applied of its actual radially bearing capacity, has positive effect.
Description
Technical field
The present invention relates to a kind of hydrostatic test special tooling and hydrostatic test method, belong to load device static load
Load performance detection technique field.
Background technology
Pressure vessel is widely used in the fields such as chemical industry, light industry, the energy and space flight.In recent years, due to the spy of pressure vessel
Different loading characteristic and operating environment, the anisotropy of composite obtains good application in this respect, develops very fast.
Composite material pressure container has many good qualities: (1) light weight, good rigidly, intensity are high；(2) reinforcement and base in composite
The faying face of body, improves the fracture toughness of material；(3) composite has a large amount of reinforcing fiber, whole component can be made short
It is unlikely in phase to lose bearing capacity；(4) corrosion resistance and good, it is not necessary to through special process.At present, various spacecrafts and
Guided missile system needs the internal pressure vessel of light high performance, is usually winding outside the inner lining materials such as Al, Ti and meets material.
The changeover portion product of composite material pressure container, in order to detect its actual static load load performance, needs to do hydrostatic pressure
Test, it is therefore desirable to have suitable testing equipment and test method.
Summary of the invention
It is an object of the invention to, for composite changeover portion product, accurately, completely, reliably detect out such knot
The actual static load load performance of structure like product.
For achieving the above object, propose and devise a kind of hydrostatic test special tooling and hydrostatic test side
Method, can accurately, reliably and securely realize the hydrostatic test of product to be measured, and then reach to fully understand the actual static load of product
The purpose of load performance.The present invention solves the concrete scheme of its technical problem:
A kind of hydrostatic test special tooling, including frock main body, frock main body is provided with upper cover, and frock bottom part body sets
Being equipped with support, frock main body is provided with water inlet, air vent, discharge outlet and Pressure gauge connector, it is defeated that water inlet connects liquid
Sending pipe, Pressure gauge connector connects Pressure gauge, and liquid delivery tube connects back-up valve and motor test pump, and described frame bottom is arranged
There is regulation foot, frock main body has seal groove, in seal groove, place the potted component of coupling.
Described frock main body is provided with suspension ring connecting hole and fork truck prong, and suspension ring connecting hole connects swivel.
Being provided with fastening accessory in described frock main body, fastening accessory includes bolt, nut, pad and spacing swivel nut.
A kind of hydrostatic test method, first assembles product to be measured with test fixture, and test tool includes frock
Main body, frock main body is provided with upper cover, and frock bottom part body is provided with support, and frock main body is provided with water inlet, aerofluxus
Mouth, discharge outlet and Pressure gauge connector, water inlet connects liquid delivery tube, and Pressure gauge connector connects Pressure gauge, and liquid carries
Pipe connects back-up valve and motor test pump, and described frame bottom is provided with regulation foot, frock main body has seal groove, seal groove
The interior potted component placing coupling；Before test, first with regulation foot frock is adjusted level, then utilize water source by frock with treat
The sealing space surveying product composition fills water, then uses motor test pump continuation water filling boosting instead, observes Pressure gauge, when being filled to refer to
During constant-pressure, carry out voltage stabilizing process on request, observe hydrostatic pressure situation, tested rear pressure relief drain.
Before formal pressure build-up test, should repeatedly carry out preliminary pressure build-up test, the gas in test space be drained, when determining examination
Test after the gas in space drains, carry out final pressure build-up test.
During test pressurization, it is stipulated that the rate of rise, require progressively slowly classification boosting according to test pressure, during every grade of boosting,
First adjust the output pressure of motor test pump to every grade of force value to be reached, boost at this pressure, reach every grade
After required pressure, close back-up valve and motor test pump, carry out voltage stabilizing, after every grade of voltage stabilizing terminates, if voltage stabilizing result meets rule
Provisioning request, carries out next stage boosting voltage stabilizing process, until completing voltage stabilizing process under final test pressure, now pressure testing process is whole
Complete, then carry out product subsequent detection and special tooling maintenance work after pressure relief drain, test.
Beneficial effect:
Beneficial effects of the present invention and advantage are mainly reflected in:
One, the structure of special tooling and the corresponding test method of design ensure that tested product bears the least axial compressive force,
For there being this product needed to bring convenience.
Two, the structure of special tooling is relatively simple, and tubular or casing product to both ends open have certain versatility,
Only need the shape of frock main body in frock body is slightly adjusted.
Three, special tooling has higher strength and stiffness, meets the security requirement under test pressure, and can basis
Test pressure suitably finely tunes tool structure to improve frock strength and stiffness.
Four, special tooling structure is relatively simple, difficulty of processing is less, cost is less expensive, practical, safe and reliable, be suitable for
In the scientific research and the small lot engineer applied that bear die pressing product in radially.
Five, the corresponding test method of special tooling and design can simply, reliably and securely complete hydrostatic test,
Thus more comprehensively understand the actual bearing capacity of product.
Accompanying drawing explanation
Fig. 1 is the hydrostatic test tool structure schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings a kind of hydrostatic test special tooling of the present invention and hydrostatic test method are made into
The detailed description of one step, but protection scope of the present invention is not limited to described embodiment.
Seeing Fig. 1, a kind of hydrostatic test special tooling of the present invention, including upper cover 6, frock main body 12 and support
14, wherein upper cover 6 and frock main body 12 have a higher flatness, and have and much strengthen gusset, can guarantee that have enough firm
Degree and intensity；Support 14 is set bottom frock main body 12, frock main body 12 is provided with water inlet, air vent, discharge outlet 13 and
Pressure gauge connector, water inlet connects liquid delivery tube 3, and Pressure gauge connector connects Pressure gauge 11, and liquid delivery tube 3 connects liter
Pressure valve 2 and motor test pump 1, be provided with regulation foot 15, frock main body 12 have seal groove, seal groove bottom described support 14
The interior potted component placing coupling, potted component is according to selected by the seal groove size in frock main body 12 and product to be measured 18
The O RunddichtringO matched.Frock main body 12 is provided with suspension ring connecting hole and fork truck prong, and suspension ring connecting hole connects swivel
9；Being provided with fastening accessory in frock main body 12, fastening accessory includes bolt 7, nut 16, pad 8 and spacing swivel nut 17；Liquid
Conveying pipe 3 connects faucet by leather hose 5 and joint 4, and frock main body 12 is provided with pin hole, places nylon platform customized in hole
Rank pin, positions when placing product, prevents product biasing from excessive affecting sealing, ensures product not to be caused mill simultaneously
Damage；Upper cover 6 and frock main body 12 have bolt special hole, place bolt 7 in hole, and bolt has supporting nut 16, pad 8 and limit
Position swivel nut 17, the effect of spacing swivel nut 17 is to protect product product, is attached frock tightly by these fastening accessories
Gu；Have special screwed hole on support 14 and connect regulation foot 15, it is achieved the front horizontal adjustment to frock of test.
When the special tooling using the present invention carries out hydrostatic test to certain product, according to following hydrostatic test side
Method is tested.First, above-mentioned special tooling is assembled on request with product 18, and incited somebody to action by swivel 9 and fork truck
The frock assembled and product lifting are transported to the test site specified.It is former that hydrostatic test pressurizes after using first water filling
Then, before test, first with regulation foot 15, frock is adjusted level.During test, first with the first-class water source of the fire hose by frock and product
The sealing spaces of 18 compositions fill water, then use motor test pump 1 instead and continue water filling boosting, observe Pressure gauge 11, when being filled to refer to
During constant-pressure, carry out voltage stabilizing process on request, observe hydrostatic pressure situation, tested rear pressure relief drain.Process of the test has
2 should be noted that: one is, before formal pressure build-up test, should repeatedly carry out preliminary pressure build-up test, are arranged by the gas in test space
To the greatest extent, after the gas in determining test space drains, final pressure build-up test can just be carried out.Two are, during test pressurization, it is stipulated that boosting
Speed, requires progressively slowly classification boosting according to test pressure.During every grade of boosting, first adjust the output pressure of motor test pump
To every grade of force value to be reached, boost at this pressure.After reaching every grade of required pressure, close back-up valve and electronic
Hydraulic test pump, carries out voltage stabilizing.After every grade of voltage stabilizing terminates, if voltage stabilizing result meets regulation requirement, carry out next stage boosting voltage stabilizing process,
Until completing voltage stabilizing process under final test pressure, now pressure testing process is fully completed.Then produce after carrying out pressure relief drain, test
The work such as product subsequent detection and special tooling maintenance.
Although in conjunction with the embodiments and the enforcement of the present invention has been carried out as above stating by accompanying drawing 1, but it shall not be construed as this
Invent the restriction of self.Under the spirit and scope of the present invention premise defined without departing from claims, can be to it at knot
Make a variety of changes in structure, form and details, and all these change and deformation all should belong to the protection of the claims in the present invention
Scope.
Claims (6)
1. a hydrostatic test special tooling, it is characterised in that include frock main body (12), frock main body (12) is upper to be arranged
Having upper cover (6), frock main body (12) bottom to be provided with support (14), frock main body is provided with water inlet, air vent, row on (12)
The mouth of a river (13) and Pressure gauge connector, water inlet connects liquid delivery tube (3), and Pressure gauge connector connects Pressure gauge (11), liquid
Body conveying pipe (3) connects back-up valve (2) and motor test pump (1), and described support (14) bottom is provided with regulation foot (15), frock
Main body has seal groove on (12), places the potted component of coupling in seal groove.
A kind of hydrostatic test special tooling the most according to claim 1, it is characterised in that described frock main body (12)
Being provided with suspension ring connecting hole and fork truck prong, suspension ring connecting hole connects swivel (9).
A kind of hydrostatic test special tooling the most according to claim 1, it is characterised in that described frock main body (12)
On be provided with fastening accessory, fastening accessory includes bolt, nut, pad and spacing swivel nut.
4. a hydrostatic test method, it is characterised in that first product to be measured is assembled with test fixture, test tool
Including frock main body (12), frock main body (12) being provided with upper cover (6), frock main body (12) bottom is provided with support (14),
Being provided with water inlet, air vent, discharge outlet (13) and Pressure gauge connector in frock main body (12), water inlet connects liquid conveying
Pipe (3), Pressure gauge connector connects Pressure gauge (11), and liquid delivery tube (3) connects back-up valve (2) and motor test pump (1), institute
Stating support (14) bottom and be provided with regulation foot (15), frock main body has seal groove on (12), places the close of coupling in seal groove
Envelope element；Before test, first with regulation foot (15), frock is adjusted level, then utilize water source frock to be formed with product to be measured
Sealing space fill water, then use motor test pump instead and continue water filling boosting, observe Pressure gauge, when being filled to specified pressure,
Carry out voltage stabilizing process on request, observe hydrostatic pressure situation, tested rear pressure relief drain.
A kind of hydrostatic test method the most according to claim 4, it is characterised in that before formal pressure build-up test, Ying Duo
Secondary carry out preliminary pressure build-up test, the gas in test space is drained, after the gas in determining test space drains, carries out
Whole pressure build-up test.
A kind of hydrostatic test method the most according to claim 5, it is characterised in that during test pressurization, it is stipulated that boosting
Speed, requires progressively slowly classification boosting according to test pressure, during every grade of boosting, first adjusts the output pressure of motor test pump
To every grade of force value to be reached, boost at this pressure, after reaching every grade of required pressure, close back-up valve and electronic
Hydraulic test pump, carries out voltage stabilizing, after every grade of voltage stabilizing terminates, if voltage stabilizing result meets regulation requirement, carries out next stage boosting voltage stabilizing process,
Until completing voltage stabilizing process under final test pressure, now pressure testing process is fully completed, after then carrying out pressure relief drain, test
Product subsequent detection and special tooling maintenance work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610634598.9A CN106092759A (en) | 2016-08-04 | 2016-08-04 | A kind of hydrostatic test special tooling and hydrostatic test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610634598.9A CN106092759A (en) | 2016-08-04 | 2016-08-04 | A kind of hydrostatic test special tooling and hydrostatic test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106092759A true CN106092759A (en) | 2016-11-09 |
Family
ID=57455064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610634598.9A Pending CN106092759A (en) | 2016-08-04 | 2016-08-04 | A kind of hydrostatic test special tooling and hydrostatic test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106092759A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840896A (en) * | 2017-01-17 | 2017-06-13 | 江苏科技大学 | One kind carries Visualized Flexible Pressure chamber hydrostatic test device |
| CN108287064A (en) * | 2017-12-28 | 2018-07-17 | 沪东重机有限公司 | A kind of pressure test method of diesel air cooler bracket |
| CN108469382A (en) * | 2018-04-12 | 2018-08-31 | 江苏恒神股份有限公司 | Carbon fibre composite connector hydraulic pressure test fixture and its construction design method |
| CN109115618A (en) * | 2018-07-12 | 2019-01-01 | 中国水利水电科学研究院 | A kind of test device and test method for pancake rubber bag tank product bearing capacity |
| CN112161873A (en) * | 2020-09-16 | 2021-01-01 | 福建省特种设备检验研究院 | Hydrostatic pressure test device of robot |
| CN112461673A (en) * | 2020-11-25 | 2021-03-09 | 南水北调中线干线工程建设管理局河南分局 | Simulation test system and method for waterproof sealing material under hydraulic pressure working condition |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202853986U (en) * | 2012-11-05 | 2013-04-03 | 南京化工职业技术学院 | Manual type water pressure testing system for pressure vessel |
| KR20130076340A (en) * | 2011-12-28 | 2013-07-08 | 대우조선해양 주식회사 | Strength test apparatus of insulation box for cargo containment |
| CN203203879U (en) * | 2013-04-12 | 2013-09-18 | 甘肃容和集团光电科技有限公司 | Water pressure tester for tunnel lamp shell |
| CN203534912U (en) * | 2013-06-25 | 2014-04-09 | 中建安装工程有限公司工程公司 | Pipeline pressure test device |
| CN103728180A (en) * | 2013-06-27 | 2014-04-16 | 四川海普流体技术有限公司 | Integrated pressure test equipment convenient to use |
| CN203798682U (en) * | 2014-05-09 | 2014-08-27 | 山东电力建设第二工程公司 | Concrete pipe rack expansion joint hydrostatic tester |
| CN203965255U (en) * | 2014-07-28 | 2014-11-26 | 国家海洋标准计量中心 | Metering-type hydrostatic pressure pilot system |
| CN204116150U (en) * | 2014-09-04 | 2015-01-21 | 上海马力索精密机械有限公司 | Jacket water compression testing device |
| CN204944762U (en) * | 2015-09-09 | 2016-01-06 | 新疆国统管道股份有限公司 | PCCP steel cylinder sealing hydrostatic test machine |
| CN206002393U (en) * | 2016-08-04 | 2017-03-08 | 江苏恒神股份有限公司 | A kind of hydrostatic test special tooling |
-
2016
- 2016-08-04 CN CN201610634598.9A patent/CN106092759A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130076340A (en) * | 2011-12-28 | 2013-07-08 | 대우조선해양 주식회사 | Strength test apparatus of insulation box for cargo containment |
| CN202853986U (en) * | 2012-11-05 | 2013-04-03 | 南京化工职业技术学院 | Manual type water pressure testing system for pressure vessel |
| CN203203879U (en) * | 2013-04-12 | 2013-09-18 | 甘肃容和集团光电科技有限公司 | Water pressure tester for tunnel lamp shell |
| CN203534912U (en) * | 2013-06-25 | 2014-04-09 | 中建安装工程有限公司工程公司 | Pipeline pressure test device |
| CN103728180A (en) * | 2013-06-27 | 2014-04-16 | 四川海普流体技术有限公司 | Integrated pressure test equipment convenient to use |
| CN203798682U (en) * | 2014-05-09 | 2014-08-27 | 山东电力建设第二工程公司 | Concrete pipe rack expansion joint hydrostatic tester |
| CN203965255U (en) * | 2014-07-28 | 2014-11-26 | 国家海洋标准计量中心 | Metering-type hydrostatic pressure pilot system |
| CN204116150U (en) * | 2014-09-04 | 2015-01-21 | 上海马力索精密机械有限公司 | Jacket water compression testing device |
| CN204944762U (en) * | 2015-09-09 | 2016-01-06 | 新疆国统管道股份有限公司 | PCCP steel cylinder sealing hydrostatic test machine |
| CN206002393U (en) * | 2016-08-04 | 2017-03-08 | 江苏恒神股份有限公司 | A kind of hydrostatic test special tooling |
Non-Patent Citations (1)
| Title |
|---|
| 丁凯等: "《金属结构类（制造与安装）》", 31 March 2010 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840896A (en) * | 2017-01-17 | 2017-06-13 | 江苏科技大学 | One kind carries Visualized Flexible Pressure chamber hydrostatic test device |
| CN106840896B (en) * | 2017-01-17 | 2019-09-27 | 江苏科技大学 | One kind having Visualized Flexible Pressure chamber hydrostatic test device |
| CN108287064A (en) * | 2017-12-28 | 2018-07-17 | 沪东重机有限公司 | A kind of pressure test method of diesel air cooler bracket |
| CN108469382A (en) * | 2018-04-12 | 2018-08-31 | 江苏恒神股份有限公司 | Carbon fibre composite connector hydraulic pressure test fixture and its construction design method |
| CN108469382B (en) * | 2018-04-12 | 2023-08-18 | 江苏恒神股份有限公司 | Hydraulic test tool for carbon fiber composite connector and structural design method thereof |
| CN109115618A (en) * | 2018-07-12 | 2019-01-01 | 中国水利水电科学研究院 | A kind of test device and test method for pancake rubber bag tank product bearing capacity |
| CN109115618B (en) * | 2018-07-12 | 2020-12-11 | 中国水利水电科学研究院 | Testing device and testing method for pressure bearing capacity of flat rubber bag product |
| CN112161873A (en) * | 2020-09-16 | 2021-01-01 | 福建省特种设备检验研究院 | Hydrostatic pressure test device of robot |
| CN112161873B (en) * | 2020-09-16 | 2023-05-26 | 福建省特种设备检验研究院 | Hydrostatic pressure test device of robot |
| CN112461673A (en) * | 2020-11-25 | 2021-03-09 | 南水北调中线干线工程建设管理局河南分局 | Simulation test system and method for waterproof sealing material under hydraulic pressure working condition |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106092759A (en) | A kind of hydrostatic test special tooling and hydrostatic test method | |
| CN101598624B (en) | High-efficiency high pressure gas leak detection method | |
| CN105181475B (en) | A kind of impulse test system of servo electric jar supercharging | |
| CN2901281Y (en) | Multifunction high pressure device safety property detector | |
| CN208653742U (en) | It is a kind of sealing and the testing integrated machine of pulse | |
| CN101598623A (en) | A kind of leak detection tool that is used for the gases at high pressure leak hunting method | |
| CN104100581B (en) | Pressurized cylinder and pressure testing supercharging device | |
| RU2416075C1 (en) | Compressed air loading plant of pressurised fuselage of aircraft during endurance test | |
| CN203798681U (en) | Hydraulic pipe strength test system | |
| CN103711688B (en) | The self-tightening sealing of a kind of ultrahigh pressure pump head body self intensification and stress test device | |
| CN104122042B (en) | A kind of voltage-withstand test method of major diameter welding structure metallic conduit | |
| CN105890845A (en) | Pipeline high strength and tightness test fixture and method | |
| CN110987646A (en) | Thin-wall double-cavity common-bottom structure storage tank pressure-bearing test equipment and method | |
| CN105300614B (en) | A kind of automobile-used LNG gas cylinders multifunction valve test system and test method | |
| CN206002393U (en) | A kind of hydrostatic test special tooling | |
| CN203685548U (en) | Self-tightening seal and stress testing device for autofrettage of ultrahigh-pressure pump head | |
| CN109406063A (en) | A kind of pressure testing device of small dimension y-type filter body | |
| CN207278600U (en) | A kind of supercharging device suitable for underwater Burning rate testing system | |
| CN106503303B (en) | A kind of composite material enhancing metallic conduit design pressure calculation method | |
| CN101598625B (en) | Tracer gas accumulator applied in high pressure gas leak detection method | |
| CN103406724B (en) | A kind of process strengthening pressure-resistance structure bearing capacity | |
| CN201322706Y (en) | Pressure testing device | |
| CN107387499A (en) | A kind of hydraulic means suitable for underwater sound emission Burning rate testing system | |
| CN204556177U (en) | Gas cylinder steam mixing pressure testing machine | |
| CN209043539U (en) | A kind of pressure testing device of small dimension y-type filter body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161109 |
|
| RJ01 | Rejection of invention patent application after publication |