CN212646273U - Recycled concrete test block anti-seismic tester - Google Patents
Recycled concrete test block anti-seismic tester Download PDFInfo
- Publication number
- CN212646273U CN212646273U CN202021342582.9U CN202021342582U CN212646273U CN 212646273 U CN212646273 U CN 212646273U CN 202021342582 U CN202021342582 U CN 202021342582U CN 212646273 U CN212646273 U CN 212646273U
- Authority
- CN
- China
- Prior art keywords
- tester
- base
- concrete test
- test block
- plate
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The application relates to a recycled concrete test block anti-seismic tester, which comprises a base plate; the tester body is arranged on the backing plate, and a protection mechanism is arranged on the tester body and comprises a protection base arranged on one side, away from the tester body, of the backing plate; the placing cavity is arranged on the protective base and used for placing the base plate and the tester body; the transparent protective shell is covered at the edge of the top of the protective base; the fastening assembly is arranged between the transparent protective shell and the protective base and used for fixing and limiting the transparent protective shell; and the shock absorption assembly is arranged between the backing plate and the placing cavity and used for absorbing shock of the tester body. This application has and is convenient for play the effect that effectively blocks to the concrete fragment that splashes and go out to can reduce the condition emergence that the tester's health suffered the damage, and then can improve the security greatly.
Description
Technical Field
The application relates to the field of concrete antidetonation instruments, especially relate to a recycled concrete test block antidetonation test appearance.
Background
The regenerated concrete is prepared by crushing, cleaning and grading waste concrete blocks, mixing the crushed, cleaned and graded waste concrete blocks with a grading agent according to a certain proportion, partially or completely replacing natural aggregates (mainly coarse aggregates) such as sand stones and the like, and adding cement, water and the like. Before the recycled concrete is used, the recycled concrete is required to be made into a concrete test block, and the concrete test block is used for carrying out tests on earthquake resistance, tensile resistance and compressive resistance so as to check the construction quality of the construction engineering, so that the construction constructed by using the concrete in the construction engineering is ensured to meet the national specified standard.
The prior Chinese patent document with the publication number of CN209745512U discloses a recycled concrete test block anti-seismic tester, which comprises a first test board, a second test board and a backing board, wherein the upper surface of the backing board is fixed with a plurality of supporting piles through bolts, the upper surface of the backing board is fixed with a plurality of bearing blocks through bolts, the first test board and the backing board are elastically connected through springs, the lower surface of the first test board is fixed with a vibrating motor through bolts, the first test board is arranged, three first test boxes are arranged on the upper surface of the first test board, the vibrating motor is arranged on the lower surface of the first test board, concrete samples clamped in the three first test boxes are subjected to vibration detection through the vibrating motor, concrete samples of different buildings can be placed in the three first test boxes simultaneously, and the amplitude of the vibrating motor is adjusted to perform contrast detection, and set up two motors and drive the main part piece and slide in No. two test panel tops, sliding connection has two clamp splices simultaneously in the main part piece, through two clamp splices, can carry out the test of pressure and tensile force to the concrete sample.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: when carrying out the test of antidetonation, compressive resistance and tensile force to the concrete test block, among the concrete test block testing process, the broken condition emergence can appear, and outside broken concrete fragment can the splash test instrument, suffer the damage to testing personnel's health easily to lead to the security to reduce.
SUMMERY OF THE UTILITY MODEL
The application provides a recycled concrete test block antidetonation test appearance adopts following technical scheme:
a recycled concrete test block anti-seismic tester comprises a base plate; the tester body is arranged on the backing plate, and a protection mechanism is arranged on the tester body and comprises a protection base arranged on one side, away from the tester body, of the backing plate; the placing cavity is arranged on the protective base and used for placing the base plate and the tester body; the transparent protective shell is covered at the edge of the top of the protective base; the fastening assembly is arranged between the transparent protective shell and the protective base and used for fixing and limiting the transparent protective shell; and the shock absorption assembly is arranged between the backing plate and the placing cavity and used for absorbing shock of the tester body.
By adopting the technical scheme, the structure that the protective base, the transparent protective shell and the fastening component are matched with each other is arranged, so that the effect of effectively blocking splashed concrete fragments can be conveniently achieved, the condition that the body of a tester is damaged can be reduced, and the safety can be greatly improved; through setting up damper, not only can play the bearing effect that stabilizes more to the tester body, but also can be convenient for play fine shock attenuation effect in tester body test procedure to can reach the effect that reduces vibrations, and then can play certain protection effect to transparent protecting crust.
Preferably, the fastening component comprises a mounting groove which is arranged at the edge of the top of the protection base and matched with the transparent protection shell; the plurality of threaded holes penetrate through the outer side wall of the protective base and are communicated with the mounting groove; the first screw rods are arranged on the outer side wall of the protective base and are in threaded connection with the threaded holes; the limiting block is arranged in the mounting groove into which the first screw rod extends; and the knob block is arranged on the first screw rod and far away from the limiting block.
Through adopting above-mentioned technical scheme, through setting up the structure that first screw rod, stopper and knob piece mutually supported, can fix the spacing in the mounting groove with transparent protecting crust to make transparent protecting crust play the effect that effectively blocks to the concrete fragment that splashes and go out.
Preferably, a plurality of limiting grooves matched with the limiting blocks are arranged on the groove wall of the mounting groove close to the threaded hole.
Through adopting above-mentioned technical scheme, through setting up the spacing groove, can be convenient for drive the spacing inslot with the stopper on the first screw rod to can be convenient for place transparent protecting crust in the mounting groove better, and then can reduce the stopper and block that transparent protecting crust puts into the condition emergence of mounting groove.
Preferably, the shock absorption assembly comprises a steel bottom plate arranged in the placing cavity; the lead core is vertically arranged on the steel bottom plate; the steel top plate is arranged at one end of the lead core, which is far away from the steel bottom plate; the rubber sleeve block is sleeved on the lead core; and the connecting piece is arranged between the steel top plate and the base plate and is used for fixedly connecting the base plate.
Through adopting above-mentioned technical scheme, through setting up the structure that steel bottom plate, lead core, steel roof and rubber cover piece mutually supported, not only can improve the bearing capacity of vertical direction to can be convenient for play the bearing effect that stabilizes more to the tester body, but also can be convenient for play fine shock attenuation effect in tester body testing process, thereby can play certain protection effect to transparent protecting crust.
Preferably, the connecting piece comprises a plurality of second screws arranged on one side of the steel top plate, which faces away from the lead core; a plurality of round holes which penetrate through the peripheral edges of the base plate and are matched with the second screw rods; and the nut is arranged on the second screw rod and is in threaded connection with the second screw rod.
Through adopting above-mentioned technical scheme, through setting up the structure that second screw rod and nut mutually supported, can be convenient for with backing plate fixed connection on the steel roof to can play firm bearing effect to the tester body on the backing plate.
Preferably, a plurality of rubber plates which are respectively abutted with the steel bottom plate, the steel top plate and the peripheral side edges of the rubber sleeve blocks are arranged on the peripheral side walls of the placing cavity.
Through adopting above-mentioned technical scheme, through setting up the rubber slab, not only make steel bottom plate, steel roof and rubber cover piece place in placing the cavity more firmly to play firm bearing effect to the tester body, but also can play the effect of certain shock insulation in tester body testing process, thereby can play the effect of shock attenuation protection to transparent protecting crust.
Preferably, the transparent protective shell is made of toughened glass.
Through adopting above-mentioned technical scheme, form for toughened glass preparation through setting up transparent protective housing, have better impact strength and bending strength's characteristics to can play the effect that effectively blocks to the concrete fragment that splashes and go out, and then can reduce tester's the health and suffer the condition emergence of damage, improve the security greatly.
Preferably, handles are symmetrically arranged on two side walls of the transparent protective shell.
Through adopting above-mentioned technical scheme, through setting up the handle, can be convenient for close transparent protective housing lid and place the cavity in, perhaps take out transparent protective housing and place the cavity outside.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the arrangement of the structure that the protection base, the transparent protection shell and the fastening assembly are matched with each other, the effect of effectively blocking splashed concrete fragments can be conveniently achieved, so that the condition that the body of a tester is damaged can be reduced, and the safety can be greatly improved; by arranging the damping component, a more stable bearing effect can be achieved on the tester body, and a good damping effect can be achieved in the test process of the tester body, so that the effect of reducing vibration can be achieved, and a certain protection effect can be achieved on the transparent protective shell;
2. by arranging the limiting groove, the limiting block on the first screw rod can be conveniently driven into the limiting groove, so that the transparent protective shell can be conveniently placed in the mounting groove, and the situation that the limiting block blocks the transparent protective shell from being placed in the mounting groove can be reduced;
3. form for toughened glass preparation through setting up transparent protective housing, have better impact strength and bending strength's characteristics to can play the effect that effectively blocks to the concrete fragment that splashes out, and then can reduce tester's the health and suffer the condition emergence of damage, improve the security greatly.
Drawings
FIG. 1 is a schematic structural diagram of a recycled concrete test block anti-seismic tester according to an embodiment of the present application.
Description of reference numerals: 1. a base plate; 11. a circular hole; 2. a tester body; 3. a protective base; 31. placing the cavity; 32. mounting grooves; 33. a threaded hole; 34. a limiting groove; 4. a transparent protective shell; 5. a first screw; 51. a limiting block; 52. a knob block; 61. a steel bottom plate; 62. a lead core; 63. a steel top plate; 631. a second screw; 64. a rubber sleeve block; 7. a nut; 8. a rubber plate; 9. a handle.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
The embodiment of the application discloses recycled concrete test block anti-seismic tester. Referring to fig. 1, the anti-seismic tester includes a pad 1; and the tester body 2 is fixedly installed on the backing plate 1, and the tester body 2 is used for testing the earthquake resistance, the compressive resistance and the tensile force of the concrete test block.
During the testing process, the concrete test block may be broken, and the fragments may splash out of the tester body 2, so that the fragments are splashed onto the ground or a table top, and the cleaning is very troublesome; and the oil easily splashes to the body of a tester, so that the body of the tester is damaged, and the potential safety hazard is increased.
Therefore, in this embodiment, a protection mechanism is disposed on the tester body 2, and the protection mechanism can be used to effectively block the splashed fragments, so as to reduce the fragments from splashing out of the tester body 2.
Specifically, referring to fig. 1, in this embodiment, the protection mechanism includes a protection base 3, a placing cavity 31 is provided on the protection base 3, and the placing cavity 31 is matched with the backing plate 1, so that the tester body 2 on the backing plate 1 can be placed in the placing cavity 31. And be equipped with a transparent protective housing 4 through the fixed lid of fastening components at this protection base 3's top, this transparent protective housing 4 forms for the toughened glass preparation, make this transparent protective housing 4 not only can let the test condition of the concrete test block in the tester body 2 of tester observation like this, but also have better impact strength and bending strength's characteristics, thereby can play the effect that effectively blocks to the concrete fragment that splashes and go out, and then can reduce fragment ground or mesa that scatters and reduce the condition emergence that suffers the damage to tester's health, the security has been improved greatly.
More specifically, referring to fig. 1, in the present embodiment, the fastening assembly includes a first screw 5, a stopper 51, and a knob block 52. Wherein, an installation groove 32 is provided at the top edge of the protection base 3, the installation groove 32 is matched with the transparent protection shell 4, so that the transparent protection shell 4 can be placed in the installation groove 32 to cover the tester body 2, a plurality of threaded holes 33 penetrate through the outer side wall of the protection base 3, and the threaded holes 33 are communicated with the installation groove 32; the first screws 5 are provided with a plurality of first screws 5, and the first screws 5 are in threaded connection with the threaded holes 33, so that the first screws 5 rotate to penetrate through the threaded holes 33 to extend into the mounting grooves 32.
Meanwhile, a plurality of limiting blocks 51 are arranged, the limiting blocks 51 are respectively and fixedly connected to one ends of the first screw rods 5 extending into the mounting groove 32, and the limiting blocks 51 are mutually abutted with the transparent protective shell 4 placed in the mounting groove 32; the knob blocks 52 are provided in plurality, the knob blocks 52 are fixedly connected to ends of the first screws 5 far away from the limiting block 51, and the first screws 5 can be rotated by rotating the knob blocks 52.
When needs fix spacingly to transparent protecting crust 4, place transparent protecting crust 4 in mounting groove 32 earlier, then rotate knob piece 52, knob piece 52 drives first screw rod 5 and rotates, first screw rod 5 is rotating the in-process, can remove along screw hole 33, in order to with stopper 51 butt on one side of transparent protecting crust 4, thereby can be fixed spacing in mounting groove 32 with transparent protecting crust 4, and then make transparent protecting crust 4 play the effect that effectively blocks to the concrete fragment that splashes and go out.
Preferably, referring to fig. 1, in this embodiment, a plurality of limiting grooves 34 are formed on the groove wall of the mounting groove 32 close to the threaded holes 33, the limiting grooves 34 are communicated with the threaded holes 33, and the limiting grooves 34 are matched with the limiting blocks 51, before the transparent protective shell 4 is placed in the mounting groove 32, the limiting blocks 51 on the first screw 5 can be driven into the limiting grooves 34, so that the transparent protective shell 4 can be better placed in the mounting groove 32, and the situation that the limiting blocks 51 block the transparent protective shell 4 from being placed in the mounting groove 32 can be reduced.
Referring to fig. 1, in order to facilitate the detachment and the fixed installation of the transparent protective shell 4, in this embodiment, the handles 9 are symmetrically and fixedly installed on two side walls of the transparent protective shell 4, and the transparent protective shell 4 can be covered in the cavity 31 or the transparent protective shell 4 can be taken out of the cavity 31 by setting the handles 9.
Referring to fig. 1, in order to reduce the occurrence of the situation that the transparent protective shell 4 is damaged by the vibration generated by the tester body 2 in the testing process, in this embodiment, a damping component is arranged between the backing plate 1 and the placing cavity 31, and the damping component not only can play a more stable bearing effect on the tester body 2, but also can play a good damping effect in the testing process of the tester body 2, thereby playing a certain protection effect on the transparent protective shell 4.
Specifically, referring to fig. 1, in the present embodiment, the shock absorbing assembly includes a steel bottom plate 61, a lead core 62, a steel top plate 63, a rubber bushing block 64, and a connecting member. Wherein, the steel bottom plate 61 is fixedly arranged at the bottom of the placing cavity 31; one end of the lead core 62 is fixedly connected to the bearing surface of the steel bottom plate 61, the lead core 62 is in a cylindrical structure, and the lead core 62 is perpendicular to the steel bottom plate 61; the steel top plate 63 is fixedly mounted on one end of the lead core 62 far away from the steel bottom plate 61, and the steel top plate 63 is perpendicular to the lead core 62 and parallel to the steel bottom plate 61; the rubber sleeve 64 is fixedly sleeved on the lead core 62, and the rubber sleeve 64 is positioned between the steel bottom plate 61 and the steel top plate 63; the connecting piece is arranged between the steel top plate 63 and the backing plate 1 so as to fix the tester body 2 on the backing plate 1.
Therefore, by arranging the structure that the steel bottom plate 61, the lead core 62, the steel top plate 63 and the rubber sleeve block 64 are matched with each other, the bearing capacity of the tester body 2 in the vertical direction can be improved, so that the tester body 2 can be more stably and fixedly installed in the placing cavity 31 of the protection base 3; but also can be convenient for play fine shock attenuation and shock insulation effect in the 2 test processes of tester body to reduce transparent protecting crust 4 and carry out the condition emergence of shake, and then can play the protection effect to transparent protecting crust 4.
More specifically, referring to fig. 1, in the present embodiment, the connector includes a second screw 631 and a nut 7. A plurality of second screws 631 are provided, the second screws 631 are fixedly mounted on a side of the steel top plate 63 away from the lead core 62, and the second screws 631 are located at the peripheral edge of the steel top plate 63; a plurality of circular holes 11 are fixedly arranged at the peripheral edge of the backing plate 1, the circular holes 11 are in threaded connection with the second screws 631, and when the backing plate 1 abuts against the steel top plate 63, the second screws 631 can respectively pass through the circular holes 11; the nuts 7 are provided in plural, and the nuts 7 are respectively screwed with the second screws 631 to be screwed into the second screws 631.
So through setting up the structure that second screw 631 and nut 7 mutually supported, can be convenient for with backing plate 1 fixed connection on steel roof 63 to can play firm bearing effect to tester body 2 on the backing plate 1.
Preferably, fixed mounting has a plurality of rubber slabs 8 on this lateral wall all around of placing cavity 31, these a little rubber slabs 8 all with steel bottom plate 61, steel roof 63 and rubber sleeve 64 side butt each other all around, so not only make steel bottom plate 61 through setting up this rubber slab 8, the structure that steel roof 63 and rubber sleeve 64 are constituteed each other can be more firmly fixed place in placing cavity 31, in order to play firm bearing effect to tester body 2, and can also play certain shock insulation effect in tester body 2 testing process, thereby can play shock attenuation protection's effect to transparent protecting crust 4.
The implementation principle of the recycled concrete test block anti-seismic tester in the embodiment of the application is as follows: when the concrete test block needs to be tested, the backing plate 1 at the bottom of the tester body 2 is placed on the steel top plate 63, the second screw 631 on the steel top plate 63 penetrates through the round hole 11 on the backing plate 1, and then the nut 7 is screwed into the second screw 631 to fix the backing plate 1 on the steel top plate 63.
Then both hands are holding handle 9 on transparent protecting crust 4, correspond transparent protecting crust 4 and place in mounting groove 32, then rotate knob piece 52 on the first screw rod 5, knob piece 52 drives first screw rod 5 and rotates, first screw rod 5 is rotating the in-process, can move forward along screw hole 33, in order to with stopper 51 butt on one side of transparent protecting crust 4, thereby can be with transparent protecting crust 4 fixed spacing in mounting groove 32, and then can start tester body 2, in order to test the concrete test block.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A recycled concrete test block anti-seismic tester comprises a base plate (1); and set up in tester body (2) on backing plate (1), its characterized in that: the tester body (2) is provided with a protection mechanism, and the protection mechanism comprises a protection base (3) arranged on one side of the base plate (1) away from the tester body (2); the placing cavity (31) is arranged on the protective base (3) and used for placing the base plate (1) and the tester body (2); the transparent protective shell (4) is covered at the top edge of the protective base (3); the fastening assembly is arranged between the transparent protective shell (4) and the protective base (3) and is used for fixing and limiting the transparent protective shell (4); and the shock absorption assembly is arranged between the backing plate (1) and the placing cavity (31) and is used for absorbing shock of the tester body (2).
2. The recycled concrete test block anti-seismic tester of claim 1, wherein: the fastening component comprises a mounting groove (32) which is arranged at the edge of the top of the protection base (3) and matched with the transparent protection shell (4); a plurality of threaded holes (33) which penetrate through the outer side wall of the protection base (3) and are communicated with the mounting groove (32); the first screw rods (5) are arranged on the outer side wall of the protective base (3) and are in threaded connection with the threaded holes (33); the limiting block (51) is arranged in the first screw (5) and extends into the mounting groove (32); and a knob block (52) arranged on the first screw (5) and far away from the limiting block (51).
3. The recycled concrete test block anti-seismic tester of claim 2, wherein: the groove wall of the mounting groove (32) close to the threaded hole (33) is provided with a plurality of limiting grooves (34) matched with the limiting blocks (51).
4. The recycled concrete test block anti-seismic tester of claim 1, wherein: the shock absorption assembly comprises a steel bottom plate (61) arranged in the placing cavity (31); the lead core (62) is vertically arranged on the steel bottom plate (61); the steel top plate (63) is arranged at one end of the lead core (62) far away from the steel bottom plate (61); a rubber sleeve block (64) sleeved on the lead core (62); and the connecting piece is arranged between the steel top plate (63) and the base plate (1) and is used for fixedly connecting the base plate (1).
5. The recycled concrete test block anti-seismic tester of claim 4, wherein: the connecting piece comprises a plurality of second screw rods (631) arranged on one side of the steel top plate (63) facing away from the lead core (62); a plurality of round holes (11) which penetrate through the peripheral edge of the backing plate (1) and are matched with the second screw rods (631); and a nut (7) which is arranged on the second screw (631) and is in threaded connection with the second screw (631).
6. The recycled concrete test block anti-seismic tester of claim 4, wherein: the side walls around the placing cavity (31) are provided with a plurality of rubber plates (8) which are respectively connected with the steel bottom plate (61), the steel top plate (63) and the side edges around the rubber sleeve block (64).
7. The recycled concrete test block anti-seismic tester of claim 1, wherein: the transparent protective shell (4) is made of toughened glass.
8. The recycled concrete test block anti-seismic tester of claim 7, wherein: handles (9) are symmetrically arranged on two side walls of the transparent protective shell (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021342582.9U CN212646273U (en) | 2020-07-08 | 2020-07-08 | Recycled concrete test block anti-seismic tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021342582.9U CN212646273U (en) | 2020-07-08 | 2020-07-08 | Recycled concrete test block anti-seismic tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212646273U true CN212646273U (en) | 2021-03-02 |
Family
ID=74789478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021342582.9U Expired - Fee Related CN212646273U (en) | 2020-07-08 | 2020-07-08 | Recycled concrete test block anti-seismic tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212646273U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113375876A (en) * | 2021-06-21 | 2021-09-10 | 深圳众为氢能科技有限公司 | Fuel cell bipolar plate air tightness testing device |
-
2020
- 2020-07-08 CN CN202021342582.9U patent/CN212646273U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113375876A (en) * | 2021-06-21 | 2021-09-10 | 深圳众为氢能科技有限公司 | Fuel cell bipolar plate air tightness testing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212646273U (en) | Recycled concrete test block anti-seismic tester | |
| CN212390008U (en) | Supporting equipment for bridge construction of bridge engineering | |
| CN211172358U (en) | Steel gallery earthquake-resistant structure | |
| EP1908983B1 (en) | Levelling and damping system for vibrations | |
| CN106090439A (en) | A kind of concrete pump pipe carries out the method for vibration damping | |
| CN210893605U (en) | Impact test stand | |
| CN112505309A (en) | Concrete sampling, detecting and inspecting equipment and detecting method | |
| CN215555333U (en) | Cement composition detection device for engineering supervision | |
| CN210533908U (en) | Concrete quality detects uses anti-impact device | |
| CN214238820U (en) | Vibration cementing device capable of avoiding holes | |
| CN219495608U (en) | Civil engineering structure shock resistance test device | |
| CN213400537U (en) | Sound-insulation damping device for surface vibration compaction instrument | |
| CN112575650A (en) | Hammering noise reduction device for road construction convenient to maintain | |
| CN220040000U (en) | Cone-shaped cement pole tensile strength detection device | |
| CN217358741U (en) | A sound-proof housing device for rock drill noise test | |
| CN219411878U (en) | Novel concrete leveling ruler that shakes | |
| CN212206816U (en) | Marshall of noise reduction hits real appearance | |
| CN210909401U (en) | Motor structure of hand mill | |
| CN220982987U (en) | Concrete crack resistance detection device for building and civil engineering | |
| CN220120534U (en) | Test fixture with protective structure | |
| CN219121896U (en) | Pavement material strength tester | |
| CN219870764U (en) | Concrete quality detection device | |
| CN217686510U (en) | Laboratory gyration mixing vacuum drying all-in-one | |
| CN220336484U (en) | Flat vibrator for building engineering construction | |
| CN218384492U (en) | Noise reduction device for cement mortar fluidity tester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210302 Termination date: 20210708 |