CN109141801A - Device for mechanical shock test - Google Patents
Device for mechanical shock test Download PDFInfo
- Publication number
- CN109141801A CN109141801A CN201811281299.7A CN201811281299A CN109141801A CN 109141801 A CN109141801 A CN 109141801A CN 201811281299 A CN201811281299 A CN 201811281299A CN 109141801 A CN109141801 A CN 109141801A
- Authority
- CN
- China
- Prior art keywords
- mechanical shock
- impact
- seeker
- impact head
- guide rail
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- 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.)
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Classifications
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention discloses the device for mechanical shock test, belongs to impact experiment equipment technical field, which includes testing stand, rack, guide assembly, impact head, product clamper, and the guide assembly includes seeker and guide rail；The guide rail is in the shape of a spiral；The seeker includes electromagnetic coil；The testing equipment further includes power supply, controller, signal projector, information-storing device, display, speed detector；When energization, the electromagnetic action that seeker is generated due to electromagnetic coil generates the magnetic force attracted to seeker.The present invention is under the double action of gravity and electromagnetic force, the quality of impact head can not be increased, impact head increases impact energy relative to the height for the product testing part bearing for needing to do impact test, to meet requirement of the mechanical shock test to impact capacity, it is compact-sized, compact overcomes the shortcomings of pendulum mechanical shock test equipment, drop hammer type mechanical shock test equipment in the prior art.
Description
Present patent application is divisional application, and parent application number is 2017103767678, and parent application number is in May, 2017
25 days.
Technical field
The present invention relates to a kind of impact test equipment, specifically a kind of mechanical impact test equipment.
Background technique
Determining that military, civilian mechanical equipment is subjected to external force and collides or the safety of product when effect, reliability and effectively
Property, it needs to carry out impact test test to product using mechanical shock test's equipment.
In the prior art, mechanical shock test's equipment has pendulum and two kinds of drop hammer type, both equipment pass through
Gravity converts impact energy required for product for the gravitional force of impact test equipment hammer body, with this to product shape
At impact, its safety, reliability and validity are tested.
Fig. 1 is pendulum mechanical shock test equipment, including rack 1, pendulum 2, jaw seat 3 and magnetic means 4, pendulum 2
Including hammer body 21 and balance staff 22, in order to facilitate the replacement of hammer body 21, hammer body 21 is replaceable by being threadably mounted on balance staff 22.Pendulum
Axis 22 is equipped with magnet arm 23.Magnet arm 23 is in arc-shaped, facilitates rotation and absorption.Magnetic means 4 is loaded on 1 end of rack, magnetic
23 magnetic field of jib can be adsorbed on magnetic means 4, and balance staff 22 is on circular shaft 11, and circular shaft 11 is located in rack 1, and balance staff 22 is with circular shaft 11
It realizes and rotates for axle center, motor 12 is installed inside rack 1, motor 12 is by the rotation of belt drive circular shaft 11, and 11 turns of circular shaft
Dynamic that the realization of balance staff 22 is driven to rotate clockwise, final to realize that hammer body 21 moves upwards, magnet arm 23 is by magnetic-adsorption in magnetic force
On device 4.Magnetic means 4 includes electromagnet 41 and power device 42, by being powered to power device 42 so that electromagnet 41 is logical
Electricity generates magnetic field, to generate adsorption capacity to magnet arm 23.When in use, it is powered off to power device 42,41 magnetic force of electromagnet disappears
It loses, 23 free-falling of magnet arm, having driven balance staff 22 with circular shaft 11 is that rotation counterclockwise is realized in axle center, final the result is that hammer body
21 fall, realizes impact test, the display of pointer 14 rotation angle on inclinometer 13.Test is completed, and control system switch is started,
Motor 12 drives the rotation of circular shaft 11 by belt, and the rotation of circular shaft 11 has driven the realization of balance staff 22 to rotate clockwise, final to realize
Hammer body 21 moves upwards, and through magnetic-adsorption on the magnetic means 4, hammer body 21 playbacks magnet arm 23.
Fig. 2 is drop hammer type mechanical shock test equipment, and fixed pedestal 2 is equipped on ground, and fixed pedestal 2 passes through different
Assembling mode can obtain different height, so as to carry out the impact test of different impact energys.Fixed platform 3 is fixed on
On fixed pedestal 2, the product for needing to do impact test is fixed in fixed platform 3.And there is photoelectrical velocity measure equipment, the photoelectric measuring
Speed variator is mounted at 5 footing of pylon, for measuring to impact velocity.Pylon 5 is equipped with guide rail 7, pylon 5 and guide rail 7
Between vertical degree be installed adjust component 8, adjusting component by adjusting vertical degree guarantees the vertical degree of track.It can be with free-falling
Hammer body 9 be located on guide rail 7, and can be done on guide rail 7 up and down vertical movement, in impact test by hammer body 9 on guide rail 7
Free-falling is completed to impact.For the impact energy for absorbing the free-falling component after the destruction of test specimen 4, filled in fixed platform 3
There is buffer.
However, either above-mentioned pendulum mechanical shock equipment or drop hammer type mechanical shock equipment, all only handles
The gravitional force of impact test equipment hammer body is converted into impact energy required for product.When the mechanical shock energy that product needs
It, can only be by increasing the height of the quality or/and hammer body of hammer body relative to the product bearing for needing to do impact test when bigger
Degree obtains required impact capacity by increasing gravitional force to increase impact energy.
But when the hammer body quality of mechanical shock equipment is excessive, it will lead to equipment heaviness, be not easy to the behaviour of impact test
Make；When hammer body is relative to the increase of product bearing height for needing to do impact test, and necessarily lead to the increasing of device height
Add.But due to the limitation of the factors such as laboratory place, more impact energys required for cannot being improved by increasing height
Amount.In view of drawbacks described above existing for current mechanical shock test's equipment, either pendulum mechanical shock equipment or drop hammer type
Mechanical shock equipment is not able to satisfy demand of the product when carrying out mechanical shock to greater impact energy.
Summary of the invention
Since the prior art is not able to satisfy the demand of product impact energy, in order to solve the above-mentioned technical problem, the present invention
A kind of mechanical shock test's equipment with special construction is provided, is rushed in the quality and hammer body for not increasing hammer body relative to needs
In the case where the height of product bearing for hitting test, by special mechanical structure and principle, to meet product to larger machine
The demand of tool impact energy.
To achieve the goals above, technical scheme is as follows:
For the device of mechanical shock test, which includes testing stand, rack, guide assembly, impact head, product
Fixture etc.；
The product clamper is arranged on the testing stand, needs to do the product testing part of impact test for clamp, anti-
Only product testing part falls off from the testing stand during impact test；
The rack is removably mounted on smooth ground, and the top of the rack is used with the guide assembly can
The mode of disassembly is fixedly connected, and is used to support the guide assembly, and the rack and the testing stand use dismountable mode
It is fixedly connected；
One end of the guide assembly is connected to the testing stand, and the other end of guide assembly is the start bit of impact head
It sets, the height of one end of the guide assembly is lower than the height of its other end, and under gravity, impact head is from described
Beginning position is moved along the guide rail.
Further, the guide assembly includes seeker and guide rail；The guide rail is in the shape of a spiral；The seeker includes electricity
Magnetic coil, the shape of seeker is in horn-like, and be open the entrance that big side is the impact head, and the small side that is open is described
The outlet of impact head；Multiple seekers are arranged successively in its axial direction, it is whole also in the shape of a spiral, spiral shell with the guide rail
It is identical to revolve shape；The guide rail is fixedly connected with each seeker using detachable；One end of guide rail is connected to the testing stand,
The other end of guide rail is the initial position of impact head；The impact head comprising substance made of permanent-magnet material etc. forming；In weight
Under the action of power and electromagnetic force, impact head is moved from the initial position along the guide rail.
Further, the product clamper has rubber or nylon spacer, prevents product clamper from product testing part is crushed.
Further, the largest contours size of the impact head is less than the minimum diameter size of the seeker inner cavity.
Further, which further includes power supply, controller, signal projector, information-storing device, display, speed
Detector；Power supply is that controller, signal projector, information-storing device, display, speed detector etc. need the component of electric energy to supply
Electricity；The speed detector is mounted on the testing stand, reaches the testing stand in impact production for detecting the impact head
Speed when product testpieces；The velocity information that the speed detector will test is transmitted to the signal projector, the letter
Velocity information is transmitted to the controller by number transmitter, and velocity information is converted into corresponding machine after controller is handled
Tool impact energy information, then the mechanical shock energy information is transmitted to display, and by the mechanical shock energy
Information is stored into information-storing device.
Further, the power supply is one of 220V domestic power supply, 380V electrical source of power or small power generation electromechanical source.
Further, the speed detector is mounted near the position that testing stand is connect with the guide rail.
Further, the signal projector and the controller are connected by the transmission mode of wireless connection or wired connection
It connects.
Further, described be wirelessly connected uses Bluetooth transmission connection type.
Compared with prior art, for the present invention, under the double action of gravity and electromagnetic force, punching can not be increased
The quality tapped the head, impact head increase impact energy relative to the height for the product testing part bearing for needing to do impact test,
To meet requirement of the mechanical shock test to impact capacity.Structure of the invention is compact, and compact overcomes and puts in the prior art
The deficiency of hammer mechanical shock test equipment, drop hammer type mechanical shock test equipment.
Detailed description of the invention
Fig. 1 is the schematic diagram of pendulum mechanical shock test equipment in the prior art；
Fig. 2 is the schematic diagram of drop hammer type mechanical shock test equipment in the prior art；
Fig. 3 is the schematic diagram of mechanical shock test's equipment of the invention；
Fig. 4 is the sectional view of seeker in mechanical shock test's equipment of the present invention；
Fig. 5 is the appearance curve figure of guide rail in mechanical shock test's equipment of the present invention；
In figure: 1- testing stand, 2- rack, 3- guide assembly, 4- impact head, 11- product clamper, 33- seeker, 34- are led
Rail.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, carries out to technical solution of the present invention clear, complete, in detail
Description.Obviously, described embodiment is only a part in the numerous embodiments of the present invention, instead of all the embodiments.
Based on the embodiment of the present invention, those skilled in the art make the present invention in the case where not making the creative labor
The technical solution of any deformation, all within protection scope of the present invention.
Embodiment one: referring to Figure of description 3, for the device of mechanical shock test, which includes testing stand
1, rack 2, guide assembly 3, impact head 4, product clamper 11 etc.；The product clamper 11 is arranged on the testing stand 1, is used for
Clamping needs to do the product testing part of impact test, prevents during impact test product testing part from the testing stand 1
On fall off；The rack 2 is removably mounted on smooth ground, and the top of the rack 2 and the guide assembly 3 use
Dismountable mode is fixedly connected, and is used to support the guide assembly 3, the rack 2 is with the testing stand 1 using dismountable
Mode is fixedly connected；One end of the guide assembly 3 is connected to the testing stand 1, and the other end of guide assembly 3 is impact head 4
Initial position, the height of one end of the guide assembly 3 is lower than the height of its other end, under gravity, impact head 4
It is moved from the initial position along the guide assembly 3.
Embodiment two: in order to increase 4 pairs of the impact head impact dynamics for needing to do impact test product, in the base of embodiment one
On plinth, further making the guide assembly 3 includes seeker 33 and guide rail 34；The guide rail 34 is in the shape of a spiral；The seeker
33 include electromagnetic coil, and in horn-like, be open the entrance that big side is the impact head 4, is open small for the shape of seeker 33
Side be the impact head 4 outlet；Multiple seekers 33 are arranged successively in its axial direction, it is whole also helically
Shape is identical as the helical form of the guide rail 34；The guide rail 34 is fixedly connected with each seeker 33 using detachable；Guide rail
34 one end is connected to the testing stand 1, and the other end of guide rail 34 is the initial position of impact head 4；The impact head 4 has magnetic
Property, being formed comprising substance made of permanent-magnet material etc.；When energization, the electromagnetic action that seeker is generated due to electromagnetic coil,
The magnetic force attracted is generated to seeker.Under the double action of gravity and electromagnetic force, impact head 4 from the initial position along
The guide rail 34 moves.
According to acting formula W=FS, (wherein, W indicates that the function that power F is done, F indicate power, and S indicates the position on the direction power F
Move), in the case where power is certain, increases the displacement on power direction, power work done can be increase accordingly；In the direction of the force
Displacement it is certain in the case where, increase the size of power, power work done can also be increased；Increase the displacement on power direction simultaneously
With the size of power, power work done can also be increased.In order to obtain preferably mechanical shock effect, the shape of seeker 33 is set to be in
The horn-like electromagnetic coil that can converge keeps the resultant force of magnetic force bigger the magnetic force of impact head 4；Guide rail 34 can increase in the shape of a spiral
Displacement of the impact head 3 in magnetic force direction increases magnetic force to the amount of work of impact head 4 by both technological means, thus
Obtain better mechanical shock effect
Product clamper crushes product testing part in order to prevent, and the product clamper 11 has rubber sheet gasket or nylon cushion
Piece is used to Protection Product testpieces.
In order to enable impact head 4 to pass through seeker inner cavity, the largest contours size of the impact head 4 is less than the guidance
The minimum diameter size of first 33 inner cavity.
Embodiment three: in order to preferably carry out mechanical shock test, make the impact test equipment that there are mechanical shock data
Display and the functions such as storage, further make the testing equipment further include power supply, controller, signal projector, information-storing device,
Display, speed detector；Power supply is that controller, signal projector, information-storing device, display, speed detector etc. need
The component of electric energy is powered；The speed detector is mounted on the testing stand 1, for detect the impact head 4 reach it is described
Speed of the testing stand when impacting product testing part；The velocity information that the speed detector will test is transmitted to the signal
Velocity information is transmitted to the controller by transmitter, the signal projector, and velocity information is turned after controller is handled
It changes corresponding mechanical shock energy information into, then the mechanical shock energy information is transmitted to display, and will be described
Mechanical shock energy information is stored into information-storing device.For the ease of testing crew operation and expand the machine mechanical shock examination
The application range of experiment device can adjust electromagnetic attraction of the seeker 33 to impact head 4 by the way that different size of current is arranged
Power, thus to the impact force of the required product testing part for doing impact test when controlling the arrival testing stand 1 of impact head 4.
For the ease of to impact test equipment provide electric energy, the power supply be 220V domestic power supply, 380V electrical source of power or
One of person's small power generation electromechanical source.For the ease of detecting the speed of impact head 4, the speed detector is mounted on testing stand
Near 1 position being connect with the guide rail 34.
For the ease of the transmission of signal, the signal projector 7 passes through wireless connection or wired connection with the controller 6
Transmission mode connection.Preferably, described be wirelessly connected uses Bluetooth transmission connection type.
When the present embodiment is in use, `
When carrying out mechanical shock test, the product testing part for needing to carry out mechanical shock test is placed on test first
It on platform 1, and is fixed with product clamper 11, impact head 4 is placed on the one end of guide assembly far from testing stand.Then machine
Tool impact test equipment powers on, and the electromagnetic coil in seeker 33 is since electromagnetic action generates magnetic field, while impact head 4 has
It is magnetic, seeker 33 generates the magnetic force attracted to impact head 4；In the magnetic force and impact head that seeker 33 generates impact head 4
Under the double action of the gravity of itself, impact head 4 travels forward in guide assembly 3 along guide rail 34, and speed constantly increases,
Testing stand 1 is eventually arrived at, product testing part is impacted, completes impact test.Wherein, seeker 33 is also opened comprising close
It closes, after impact head 4 passes through a seeker 33, has already passed through the seeker 33 close to switch perception impact head 4, it is described to connect
Nearly switch disconnects the connection of the seeker 33 and power supply, the magnetic force pair generated with the seeker 33 for preventing impact head 4 from having already passed through
Seeker 4 generates the magnetic force of interference.
The present embodiment, can be under the double action of the gravity of magnetic force and impact head itself that seeker generates impact head
Do not increase impact head quality, impact head relative to the height of product testing part bearing for needing to do impact test the case where
Under, to increase impact energy, to meet requirement of the mechanical shock test to impact capacity.The testing equipment is compact-sized, volume
It is small and exquisite, pendulum mechanical shock test equipment, the deficiency of drop hammer type mechanical shock test equipment in the prior art are overcome, is provided
A kind of new impact test equipment, has pushed the development of technology.
Claims (7)
1. being used for the device of mechanical shock test, which includes testing stand (1), rack (2), guide assembly (3), impact
Head (4), product clamper (11)；It is characterized in that, the product clamper (11) is arranged on the testing stand (1), the product
Fixture (11) has rubber sheet gasket, prevents product clamper from product testing part is crushed, and needs to do the production of impact test for clamping
Product testpieces prevents product testing part during impact test from falling off from the testing stand (1)；The rack (2) can
It is releasably mounted on smooth ground, the top and the guide assembly (3) of the rack (2) are solid using dismountable mode
Fixed connection, is used to support the guide assembly (3), and the rack (2) is fixed with the testing stand (1) using dismountable mode
Connection；One end of the guide assembly (3) is connected to the testing stand (1), and the other end of guide assembly (3) is impact head (4)
Initial position, the height of one end of the guide assembly (3) is lower than the height of its other end, under gravity, impact
Head (4) is moved from the initial position along the guide rail (34)；The guide assembly (3) includes seeker (33) and guide rail
(34)；The guide rail (34) is in the shape of a spiral；The seeker (33) includes electromagnetic coil, and the shape of seeker (33) is in loudspeaker
Shape, be open the entrance that big side is the impact head (4), and be open the outlet that small side is the impact head (4)；Multiple institutes
Seeker (33) is stated to be arranged successively in seeker axial direction, it is whole also in the shape of a spiral, helical form phase with the guide rail (34)
Together；The guide rail (34) is fixedly connected with each seeker (33) using detachable；One end of guide rail (34) is connected to described
Testing stand (1), the other end of guide rail (34) are the initial position of impact head (4)；The impact head (4) is by including permanent-magnet material system
At material composition；Under the action of gravity and electromagnetic force, impact head (4) is from the initial position along the guide rail (34)
Movement, which further includes power supply, controller, signal projector, information-storing device, display, speed detector；Power supply
The component of electric energy is needed to power for controller, signal projector, information-storing device, display, speed detector；The speed inspection
It surveys device to be mounted on the testing stand (1), reaches the testing stand in impact product testing part for detecting the impact head (4)
When speed；The velocity information that the speed detector will test is transmitted to the signal projector, the signal projector
Velocity information is transmitted to the controller, velocity information is converted into corresponding mechanical shock energy after controller is handled
Information is measured, then the mechanical shock energy information is transmitted to display, and the mechanical shock energy information is stored
Into information-storing device.
2. the device according to claim 1 for mechanical shock test, which is characterized in that product clamper (11) tool
There is nylon spacer, prevents product clamper from product testing part is crushed.
3. the device according to claim 2 for mechanical shock test, which is characterized in that the impact head (4) is most
Big overall size is less than the minimum diameter size of the seeker (33) inner cavity.
4. the device according to claim 1 for mechanical shock test, which is characterized in that the power supply is 220V household
One of power supply, 380V electrical source of power or small power generation electromechanical source.
5. the device according to claim 1 for mechanical shock test, which is characterized in that the speed detector installation
Near the position that testing stand (1) is connect with the guide rail (34).
6. the device according to claim 1 for mechanical shock test, which is characterized in that the signal projector and institute
It states controller and passes through the connection of the transmission mode of wireless connection or wired connection.
7. the device according to claim 6 for mechanical shock test, which is characterized in that the wireless connection is using blue
Tooth transmits connection type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811281299.7A CN109141801A (en) | 2017-05-25 | 2017-05-25 | Device for mechanical shock test |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811281299.7A CN109141801A (en) | 2017-05-25 | 2017-05-25 | Device for mechanical shock test |
| CN201710376767.8A CN106989890B (en) | 2017-05-25 | 2017-05-25 | A kind of mechanical shock test's equipment |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710376767.8A Division CN106989890B (en) | 2017-05-25 | 2017-05-25 | A kind of mechanical shock test's equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109141801A true CN109141801A (en) | 2019-01-04 |
Family
ID=59420347
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710376767.8A Expired - Fee Related CN106989890B (en) | 2017-05-25 | 2017-05-25 | A kind of mechanical shock test's equipment |
| CN201811281299.7A Pending CN109141801A (en) | 2017-05-25 | 2017-05-25 | Device for mechanical shock test |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710376767.8A Expired - Fee Related CN106989890B (en) | 2017-05-25 | 2017-05-25 | A kind of mechanical shock test's equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN106989890B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823493A (en) * | 2019-12-04 | 2020-02-21 | 中国建材检验认证集团(陕西)有限公司 | Hidden water tank shock resistance test device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507888A (en) * | 2018-04-25 | 2018-09-07 | 中国矿业大学(北京) | A kind of non-contact self-priming dynamic impact device |
| CN115060448B (en) * | 2022-06-22 | 2024-03-22 | 江苏德纳精工轴承有限公司 | Test device for impact resistance of bearing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3611783A (en) * | 1968-06-20 | 1971-10-12 | Hill Acme Co | Electromagnetically energized impact forming device |
| CN103293069A (en) * | 2013-05-10 | 2013-09-11 | 广东工业大学 | Multi-way high-energy high-speed electromagnetic force impact intelligent control testing device and method |
| CN103712764A (en) * | 2013-11-29 | 2014-04-09 | 上海卫星装备研究所 | Electromagnetic hammer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU679850A1 (en) * | 1977-04-22 | 1979-08-15 | Новосибирский электротехнический институт | Pile driver |
| CN2771847Y (en) * | 2005-03-18 | 2006-04-12 | 杨文涛 | Drop-off grinding ball test machine |
| CN202793944U (en) * | 2012-07-27 | 2013-03-13 | 华中科技大学 | Drop hammer type impact test device |
| CN103134655B (en) * | 2013-02-06 | 2015-06-24 | 浣石 | Rotary hammer type impact test device |
| CN204101259U (en) * | 2014-09-05 | 2015-01-14 | 上海同耀通信技术有限公司 | A kind of heavy impact experimental provision |
-
2017
- 2017-05-25 CN CN201710376767.8A patent/CN106989890B/en not_active Expired - Fee Related
- 2017-05-25 CN CN201811281299.7A patent/CN109141801A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3611783A (en) * | 1968-06-20 | 1971-10-12 | Hill Acme Co | Electromagnetically energized impact forming device |
| CN103293069A (en) * | 2013-05-10 | 2013-09-11 | 广东工业大学 | Multi-way high-energy high-speed electromagnetic force impact intelligent control testing device and method |
| CN103712764A (en) * | 2013-11-29 | 2014-04-09 | 上海卫星装备研究所 | Electromagnetic hammer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823493A (en) * | 2019-12-04 | 2020-02-21 | 中国建材检验认证集团(陕西)有限公司 | Hidden water tank shock resistance test device |
| CN110823493B (en) * | 2019-12-04 | 2024-05-17 | 中国建材检验认证集团(陕西)有限公司 | Hidden water tank impact test device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106989890A (en) | 2017-07-28 |
| CN106989890B (en) | 2019-01-04 |
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Application publication date: 20190104 |