CN109596435A - A kind of test method for testing filter core critical external compressive resistance disruption properties - Google Patents
A kind of test method for testing filter core critical external compressive resistance disruption properties Download PDFInfo
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- CN109596435A CN109596435A CN201811624581.0A CN201811624581A CN109596435A CN 109596435 A CN109596435 A CN 109596435A CN 201811624581 A CN201811624581 A CN 201811624581A CN 109596435 A CN109596435 A CN 109596435A
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- filter core
- pressure
- compressive resistance
- test method
- test
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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
- 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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/062—Special adaptations of indicating or recording means with mechanical indicating or recording means
-
- 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
-
- 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
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0087—Resistance to crushing
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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
- G01N2203/0605—Mechanical indicating, recording or sensing means
Abstract
A kind of test method for testing filter core critical external compressive resistance disruption properties, including install, pressurize four preceding preparation, applied voltage test and data processing steps, this method applies uniform outer compressive load to the outer wall of filter core by filling the water pressurization in the toroidal cavity to sealing, the deflection that filter core is measured by dial gauge, finally obtains the critical external compressive resistance crushing strength of filter core.Test method of the invention is reasonable, it is easy to operate, the relationship between filter core deflection and outer pressure pressure is obtained by test, and according to the relationship between filter core deflection and outer pressure pressure, use condition and the certain requirement of environment setting to automatic backwashing filter, or increase the device for preventing outer pressure pressure excessive in automatic backwashing filter, or improve filter core structure or material and obtain bigger compression strength, to avoid filter core in use occurs conquassation cause automatic backwashing filter use failure.
Description
Technical field
The present invention relates to a kind of test methods for testing filter core critical external compressive resistance disruption properties used in water treatment field.
Background technique
Currently, automatic backwashing filter has been widely used for the industries such as power plant, ocean, petrochemical industry.Automatic backflushing
Washed filter is mainly made of filter element part, soil pick-up component, transmission parts, and filter element part belongs to the important component of filter,
Its performance quality directly influences the ability to work of filter.
The water inlet of automatic backwashing filter is connected directly with import water valve, and the import water valve other end connects water inlet
Pump, water outlet is connected directly with outlet valve, and import water valve and outlet water valve be mostly used greatly motor-driven valve without position feed back signal or
Pneumatic operated valve.When filter is closed in starting, either on or off import water valve and outlet water valve, water flow are easy to generate filter element
Very big active force forms water hammer effect.To automatic backwashing filter, there are following harm after water hammer effect is formed: 1 accelerates
The abrasion of suction nozzle;2 cause the skeleton of filter core and strainer to deform, if pressure crosses senior general and causes the severely deformed of filter core, and then are crushed;
Wherein the severely deformed or even conquassation of filter core will cause the ability to work of soil pick-up drive mechanism in automatic backwashing filter
Tremendous influence.
In order to avoid water hammer effect is seriously destroyed caused by filter core, need to obtain the performance ginseng of filter core critical external compressive resistance conquassation
Number.Only have the test method for testing the anti-internal pressure disruption properties of filter core in domestic standard or patent at present, it is anti-for test filter core outer
The test method of pressure disruption properties does not have clear stipulaties.
Summary of the invention
The present invention is to solve the technical problems existing in the prior art, provide it is a kind of it is easy to operate, economic benefit is higher, just
The test method of relationship between the filter core deflection and outer pressure pressure of measurement sets for the filer element strength of automatic backwashing filter
Meter and optimization and its use condition, provide certain data supporting.
The technical scheme adopted by the present invention to solve the technical problems existing in the known art is that
A kind of test method for testing filter core critical external compressive resistance disruption properties, which comprises the following steps:
1) it, installs: wrapping up one layer of impermeable film on the outer surface of filter core to be measured, experimental rig is then put into the lower end of filter core
Test box in;The experimental rig further includes being sleeved on survey other than the test box of hollow tubular for including both ends open
Try case lower end circular ring shape lower end connecting plate, be sleeved on test box upper end circular ring shape upper end connecting plate, be mounted on lower end
Lower end blind flange on connecting plate, the lower end support ring being fixedly connected on the blind flange of lower end and for measuring filter core deflection
Dial gauge, the lower end of filter core are removably mounted in the support ring of lower end;Then the upper end of filter core is removably installed into examination
In the upper end support ring of experiment device, the upper flanges lid of the upper end support ring and experimental rig is fixed together, on
End flanges lid is sealed the upper end of filter core and test box by being fixedly connected with upper end connecting plate;Filter core and lower end blind flange, on
Closed ring cavity is formed between end flanges lid and test chamber interior wall, pressure gauge is set to measure the pressure in ring cavity;
Upper flanges, which cover, is provided with water inlet pipe and exhaust pipe, is provided with drainpipe on the blind flange of lower end, by water inlet pipe and inlet valve
One end connection, the other end of inlet valve are connect with booster pump, and exhaust pipe is connect with exhaust valve, and drain valve is connect with drainpipe, filter
Core installs;
2) prepare before, pressurizeing: after installing filter core, closing drain valve, open exhaust valve and inlet valve, it is empty to annular with booster pump
Intracavitary water filling is to be discharged the air in toroidal cavity, when there are flowing out at exhaust valve, closes exhaust valve, observes the reading of pressure gauge
Number, is adjusted to 0Mpa for pressure gauge reading;
3), applied voltage test: booster pump continues to pressurize into toroidal cavity, and pressure is the external pressure pressure that filter core is subject in toroidal cavity
Power observes the reading of pressure gauge, when pressure increases 0.09-0.11Mpa in toroidal cavity, pressure maintaining 10-20min, and observation
The reading of dial gauge, that is, the filter core deflection after corresponding to this time pressurization, and keep a record;Until the reading of dial gauge reaches filter core institute
The maximum deformation quantity for allowing to reach, maximum distortion numerical quantity use the 1% of filter core outer diameter, terminate test;Then exhaust valve is opened,
Pressure release is first carried out, when observing pressure gauge reading is 0Mpa, drain valve is opened and is drained, until in emptying toroidal cavity
Water;After water empties, exhaust valve and drain valve are closed;
4), data processing: the curve between the outer pressure pressure of filter core and filter core deflection is drawn: according to step) data of record, it draws
Curve between the outer pressure pressure and filter core deflection of filter core processed, locating pressure is made when filter core deformation is reached maximum deformation quantity
For the critical external compressive resistance crushing strength of filter core, test data is recorded and saved.
Further, it in step 1), before impermeable film is wrapped up in the outer surface of filter core to be measured, is first opened at the both ends of filter core
If then sealing ring is installed into the circumferential groove for being wrapped with impermeable film by circumferential groove, after the both ends of filter core install sealing ring, carry out
Step) in further installation procedures.
Further, in step 1), after the both ends of filter core install sealing ring, placement two is close on the end face of filter core lower end
Packing sandwiches impermeable film between two gaskets, places two gaskets on the end face of filter core upper end, two gaskets it
Between sandwich impermeable film, four gaskets are with a thickness of 2mm, after the both ends of filter core install gasket, carry out step) in after
Continuous installation steps.
Further, the sealing ring is o type sealing ring.
Further, support rod is provided on lower end blind flange described in step 1), filter core is sleeved on the outer of support rod
Portion, dial gauge are arranged four, are installed in the middle position of support rod, and four dial gauges are uniformly looped around the difference of support rod
On circumferencial direction, the gauge head of four dial gauges is adjusted, is contacted with the inner surface of filter core to measure the deflection of filter core.
Further, pressure gauge described in step 1) is mounted on the intermediate position outside test box, with four dial gauges
Gauge head be in same level.
Further, it complete experimental rig bottom is not installed described in step 1) is provided with and be fixedly connected on lower end flanges
The support column covered and the backing plate for being fixedly connected on support column lower end.
Further, impermeable film described in step 1) uses plastic cloth.
Further, circular gasket is provided between lower end connecting plate described in step 1) and lower end blind flange,
The gasket of circular ring shape is provided between upper end connecting plate and upper flanges lid, described two gaskets are with a thickness of 4mm.
Through the above technical solutions, the present invention has the following beneficial effects:
In view of the deficiencies of the prior art, the present invention provides a kind of test method for testing filter core critical external compressive resistance disruption properties, the party
Method applies uniform outer compressive load to the outer wall of filter core by filling the water pressurization in the toroidal cavity to sealing, is measured by dial gauge
The deflection of filter core finally obtains the critical external compressive resistance crushing strength of filter core;Wherein, it is contemplated that filter core core is permeable, outside filter core
One layer of impermeable film is wrapped up, to pressure resistance very little when impermeable film is pressurized to filter core, can be neglected;Outer compressive load it is big
It is small to be read by the pressure gauge on test box, consider pressure caused by the oneself height difference of water in toroidal cavity, in order to
The actual value of cartridge pressure is truly reacted, pressure gauge is placed on position among test box, the deflection measurement point with filter core
In in same level;In order to the measurement filter core deflection under external pressure of more objective reality, and carry out real-time
Observation and record, dial gauge are set as four, are placed in the biggish middle position of deflection, and dial gauge is in filter core intermediate interface
On be distributed at even circumferential.
Test method of the invention is reasonable, easy to operate, is obtained between filter core deflection and outer pressure pressure by test
Relationship;According to the relationship between filter core deflection and outer pressure pressure, the use condition and environment of automatic backwashing filter are set
Certain requirement is set, perhaps increase the device for preventing outer pressure pressure excessive in automatic backwashing filter or improves filter core
Structure or material and obtain bigger compression strength, to avoid filter core in use occur conquassation cause automatic backflushing wash
Filter uses failure.
Detailed description of the invention
Fig. 1 is the schematic cross-sectional view of experimental rig used in the present invention;
Fig. 2 be I in Fig. 1 at enlarged diagram;
Fig. 3 be II in Fig. 1 at enlarged diagram;
In figure: 1, exhaust valve, 2, exhaust pipe, 3, upper flanges lid, 4, upper end support ring, 5, toroidal cavity, 6, support rod, 7, survey
Try case, 8, pressure gauge, 9, dial gauge, 10, lower end blind flange, 11, lower end support ring, 12, drainpipe, 13, drain valve, 14, pad
Plate, 15, support column, 16, lower end connecting plate, 17, filter core, 18, sealing ring, 19, impermeable film, 20, gasket, 21, upper end company
Fishplate bar, 22, water inlet pipe, 23, inlet valve, 24, booster pump.
Specific embodiment
In the description of the present invention, it is to be understood that, the orientation or positional relationship of the instructions such as term " on " "lower" is base
In attached orientation or positional relationship shown in FIG. 1, it is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion
Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of invention protection scope.
Further specific detailed description is done to the present invention with reference to the accompanying drawings and detailed description.
A kind of test method for testing filter core critical external compressive resistance disruption properties, comprising the following steps:
1) it, installs: opening up circumferential groove at the both ends of filter core 17 to be measured, it is thin that one layer of water proof is then wrapped up on the outer surface of filter core 17
Film 19, impermeable film 19 use plastic cloth, sealing ring 18 are installed into the circumferential groove for being wrapped with impermeable film 19, sealing ring 18 is adopted
With o type sealing ring, after the both ends of filter core 17 install sealing ring 18, the close of two 2mm thickness is placed on the end face of 17 lower end of filter core
Packing 20 sandwiches impermeable film 19 between two gaskets 20, and the sealing of two 2mm thickness is placed on the end face of 17 upper end of filter core
Pad 20 sandwiches impermeable film 19 between two gaskets 20, then the lower end of filter core 17 is put into the test box 7 of experimental rig
It is interior;The experimental rig further includes being sleeved under test box 7 other than the test box 7 of hollow tubular for including both ends open
The lower end connecting plate 16 of the circular ring shape at end, be sleeved on 7 upper end of test box circular ring shape upper end connecting plate 21, be mounted on lower end company
Thick circular close of lower end blind flange 10 on fishplate bar 16, the 4mm being mounted between lower end connecting plate 16 and lower end blind flange 10
Packing 20, the lower end support ring 11 being fixedly connected on lower end blind flange 10, the support being fixedly connected on lower end blind flange 10
6, four, bar for measuring the dial gauges 9 of 17 deflection of filter core, the support column 15 being fixedly connected on lower end blind flange 10 and solid
Surely it is connected to the backing plate 14 of 15 lower end of support column, the lower end of filter core 17 is removably mounted in lower end support ring 11 and is sleeved on
The outside of support rod 6, four dial gauges 9 are installed in the middle position of support rod 6, and four dial gauges 9 are uniformly looped around branch
On the different circumferencial directions of strut 6, the gauge head of four dial gauges 9 is adjusted, is contacted with 17 surface of filter core to measure filter core 17
Deflection;The upper end of filter core 17 is installed into the upper end support ring 4 of experimental rig, the upper end support ring 4 and test fill
The upper flanges lid 3 set is fixed together, upper flanges lid 3 by being fixedly connected with upper end connecting plate 21 by filter core 17 and
The upper end of test box 7 seals, and is formed between 7 inner wall of filter core 17 and lower end blind flange 10, upper flanges lid 3 and test box closed
Ring cavity 5, the intermediate position outside test box 7 are provided with pressure gauge 8 to measure the pressure in ring cavity 5, pressure gauge 8 with
The gauge head of four dial gauges 8 is in same level;Water inlet pipe 22 and exhaust pipe 2, lower hold-carrying are provided on upper flanges lid 3
It is provided with drainpipe 12 on blue lid 10, water inlet pipe 22 is connect with one end of inlet valve 23, the other end of inlet valve 23 and pressurization
24 connection of pump, exhaust pipe 2 are connect with exhaust valve 1, and drain valve 13 is connect with drainpipe 12, and filter core 17 installs;
2), prepare before pressurization: after installing filter core 17, closing drain valve 13, open exhaust valve 1 and inlet valve 23, use booster pump
24 air filled the water into toroidal cavity 5 to be discharged in toroidal cavity 5, when there are flowing out at exhaust valve 1, close exhaust valve 1,
The reading of pressure gauge 8 is adjusted to 0Mpa by the reading for observing pressure gauge 8;
3), applied voltage test: booster pump 24 continues to pressurize into toroidal cavity 5, in toroidal cavity pressure be filter core be subject to it is outer
Pressure pressure observes the reading of pressure gauge 8, and when pressure increases 0.1Mpa in toroidal cavity 5, pressure maintaining 15min observes percentage
The reading of table 9, that is, the filter core deflection after corresponding to this time pressurization, and keep a record;Until the reading of dial gauge 9 reaches 17 institute of filter core
The maximum deformation quantity for allowing to reach, maximum distortion numerical quantity use the 1% of 17 outer diameter of filter core, terminate test;Then exhaust valve is opened
1, pressure release is first carried out, when observing the reading of pressure gauge 8 is 0Mpa, drain valve 13 is opened and is drained, until emptying toroidal cavity 5
Interior water;After water empties, exhaust valve 1 and drain valve 13 are closed;
4), data processing: draw the curve between the outer pressure pressure of filter core and filter core deflection: the data recorded according to step 3 are drawn
Filter core 17 is deformed pressure locating when reaching maximum deformation quantity by the curve between the outer pressure pressure and filter core deflection of filter core 17 processed
Critical external compressive resistance crushing strength of the power as filter core 17, records and saves test data.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to previous embodiment
Documented technical solution is modified, or equivalent substitution of some or all of the technical features;And these are repaired
Change or replaces, the range for technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (9)
1. a kind of test method for testing filter core critical external compressive resistance disruption properties, which comprises the following steps:
1) it, installs: one layer of impermeable film (19) is wrapped up on the outer surface of filter core to be measured (17), then by the lower end of filter core (17)
It puts into the test box (7) of experimental rig;Test box (7) of the experimental rig in addition to the hollow tubular including both ends open
It outside, further include the lower end connecting plate (16) for being sleeved on the circular ring shape of test box (7) lower end, the circle for being sleeved on test box (7) upper end
The upper end connecting plate (21) of annular, is fixedly connected on lower hold-carrying at the lower end blind flange (10) being mounted on lower end connecting plate (16)
Lower end support ring (11) on orchid lid (10) and the dial gauge (9) for measuring filter core (17) deflection, the lower end of filter core (17)
It is removably mounted in lower end support ring (11);Then the upper end of filter core (17) is removably installed into the upper of experimental rig
It holds in support ring (4), the upper flanges lid (3) of the upper end support ring (4) and experimental rig is fixed together, upper end
Blind flange (3) is sealed the upper end of filter core (17) and test box (7) by being fixedly connected with upper end connecting plate (21);Filter core (17)
It is formed closed ring cavity (5) between lower end blind flange (10), upper flanges lid (3) and test box (7) inner wall, setting pressure
Power table (8) is to measure the pressure in ring cavity (5);Water inlet pipe (22) and exhaust pipe (2) are provided on upper flanges lid (3),
It is provided with drainpipe (12) on lower end blind flange (10), water inlet pipe (22) is connect with one end of inlet valve (23), inlet valve
(23) the other end is connect with booster pump (24), and exhaust pipe (2) is connect with exhaust valve (1), drain valve (13) and drainpipe (12)
Connection, filter core (17) install;
2), prepare before pressurization: after installing filter core (17), closing drain valve (13), open exhaust valve (1) and inlet valve (23),
The air to be discharged in toroidal cavity (5) is filled the water into toroidal cavity (5) with booster pump (24), has water flow at exhaust valve (1)
It when out, closes exhaust valve (1), observes the reading of pressure gauge (8), pressure gauge (8) reading is adjusted to 0Mpa;
3), applied voltage test: booster pump (24) continues to pressurization in toroidal cavity (5), in toroidal cavity pressure be filter core by
Outer pressure pressure, observe pressure gauge (8) reading, when toroidal cavity (5) interior pressure increases 0.09-0.11Mpa, pressure maintaining
10-20min observes the reading of dial gauge (9), that is, the filter core deflection after corresponding to this time pressurization, and keeps a record;Until dial gauge
(9) reading reaches the maximum deformation quantity that filter core (17) allows to reach, and maximum distortion numerical quantity is using filter core (17) outer diameter
1%, terminate test;Then exhaust valve (1) is opened, first carries out pressure release, when observing pressure gauge (8) reading is 0Mpa, open draining
Valve (13) is drained, the water in emptying toroidal cavity (5);After water empties, exhaust valve (1) and drain valve (13) are closed;
4), data processing: drawing the curve between the outer pressure pressure of filter core and filter core deflection: the data recorded according to step 3),
The curve between the outer pressure pressure and filter core deflection of filter core (17) is drawn, filter core (17) deformation is reached into maximum deformation quantity when institute
Critical external compressive resistance crushing strength of the pressure at place as filter core (17), records and saves test data.
2. a kind of test method for testing filter core critical external compressive resistance disruption properties as described in claim 1, it is characterised in that: step 1)
In, before impermeable film (19) are wrapped up in the outer surface of filter core to be measured (17), circumferential groove first is opened up at the both ends of filter core (17), so
Sealing ring (18) is installed into the circumferential groove for being wrapped with impermeable film (19) afterwards, the both ends of filter core (17) install sealing ring (18)
Afterwards, the further installation procedures in step 1) are carried out.
3. a kind of test method for testing filter core critical external compressive resistance disruption properties as claimed in claim 2, it is characterised in that: step 1)
In, after the both ends of filter core (17) install sealing ring (18), two gaskets (20) of placement on the end face of filter core (17) lower end, two
Impermeable film (19) are sandwiched between a gasket (20), two gaskets (20) of placement on the end face of filter core (17) upper end, two
It is sandwiched impermeable film (19) between a gasket (20), with a thickness of 2mm, the both ends of filter core install close four gaskets (20)
After packing, the further installation procedures in step 1) are carried out.
4. a kind of test method for testing filter core critical external compressive resistance disruption properties as claimed in claim 2, it is characterised in that: described close
Seal (18) is o type sealing ring.
5. a kind of test method for testing filter core critical external compressive resistance disruption properties as described in claim 1, it is characterised in that: step 1)
Described in lower end blind flange (10) on be provided with support rod (6), filter core (17) is sleeved on the outside of support rod (6), dial gauge
(9) it is arranged four, is installed in the middle position of support rod (6), and four dial gauges (9) are uniformly looped around support rod (6)
On different circumferencial directions, the gauge head of four dial gauges (9) is adjusted, is contacted with the inner surface of filter core (17) to measure filter core (17)
Deflection.
6. a kind of test method for testing filter core critical external compressive resistance disruption properties as claimed in claim 4, it is characterised in that: step 1)
Described in pressure gauge (8) be mounted on the external intermediate position of test box (7), the gauge head with four dial gauges (8) is in same
On horizontal plane.
7. a kind of test method for testing filter core critical external compressive resistance disruption properties as described in claim 1, it is characterised in that: step 1)
Described in do not install complete experimental rig bottom be provided with the support column (15) being fixedly connected on lower end blind flange (10) and
It is fixedly connected on the backing plate (14) of support column (15) lower end.
8. a kind of test method for testing filter core critical external compressive resistance disruption properties as described in claim 1, it is characterised in that: step 1)
Described in impermeable film (19) use plastic cloth.
9. a kind of test method for testing filter core critical external compressive resistance disruption properties as described in claim 1, it is characterised in that: step 1)
Described in lower end connecting plate and lower end blind flange between be provided with circular gasket (20), upper end connecting plate and upper flanges
The gasket (20) of circular ring shape is provided between lid, described two gaskets (20) are with a thickness of 4mm.
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CN113281187A (en) * | 2021-06-25 | 2021-08-20 | 临海伟星新型建材有限公司 | Pipe pressure resistance testing device and testing method thereof |
CN114001634A (en) * | 2021-10-12 | 2022-02-01 | 上海空间推进研究所 | Device and method for testing deformation of valve element |
CN114001634B (en) * | 2021-10-12 | 2023-06-30 | 上海空间推进研究所 | Valve element deformation testing device and method |
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