CN208323783U - A kind of potential energy water spray dedusting vibration isolation type concrete drums - Google Patents
A kind of potential energy water spray dedusting vibration isolation type concrete drums Download PDFInfo
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- CN208323783U CN208323783U CN201721849392.4U CN201721849392U CN208323783U CN 208323783 U CN208323783 U CN 208323783U CN 201721849392 U CN201721849392 U CN 201721849392U CN 208323783 U CN208323783 U CN 208323783U
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- water
- potential energy
- feed inlet
- vibration isolation
- piston
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Abstract
The utility model relates to concrete production equipment.A kind of potential energy water spray dedusting vibration isolation type concrete drums, including tank body, tank body is equipped with vibration isolation foot, feed inlet, cloth water ring, penetrate through the hole for water spraying of feed inlet, replenisher tank and transition water pot, water supply pipe is connected to by the first check valve opened towards transition water pot with transition water pot, transition water pot is connected to by the second one-way valve opened towards the cloth water ring with cloth water ring, material potential energy recovering mechanism is equipped in tank body, material potential energy recovering mechanism includes the water vat being vertically arranged, piston in water vat, the piston rod for stretching out water vat upward being connected on piston, reset spring that driving piston in water vat moves up and connection on the piston rod and the splicing plate that is located at immediately below feed inlet, the rodless cavity of water vat is connected to by runner with the transition water pot.The utility model has the advantages that the fugitive dust generated when vibration isolating effect can reduce well production, solves the problems, such as agitator tank vibration isolating effect difference and is also easy to produce fugitive dust.
Description
Technical field
The utility model relates to concrete production equipment more particularly to a kind of potential energy water spray dedusting vibration isolation type concrete to stir
Mix tank.
Background technique
Concrete, referred to as " concrete (t ó ng) ": refer to the cementing integral engineered composite material of aggregate by cementitious material
General designation.One word of concrete usually said, which refers to, makees cementitious material, sand, masonry aggregate with cement；With water (additive can be contained and mixed
Close material) cooperate by a certain percentage, it is agitated obtained by cement concrete, also referred to as normal concrete, it is widely used in building work
Journey.Concrete such as concrete is to be stirred to mix by water, aggregate and cementitious material by agitator to produce
's.The same basic structure of stirring includes staving and blender, and staving is equipped with feed inlet and concrete outlet, and blender includes stirring
The motor of axis, the stirring blade being located in agitator being arranged on agitating shaft and driving agitating shaft rotation.Feed inlet has staving
Upper end all open wide and constitutes, stirring motor is arranged in outside the bottom wall of staving, when material is poured by feed inlet be easy production
Raw dust raising phenomenon；Tank body is supported on the ground by the iron foot of rigidity, is not only easy to be rusted but also vibration isolating effect is poor；For
Prevent water from leaking out through the junction of shaft and staving bottom wall, needing to seal here, and due to the influence shaft of production environment
Bearing damage and leakage phenomenon are easy to produce at the sealing of staving.
Utility model content
The potential energy water spray that can reduce the fugitive dust generated when production that it is good that the utility model provides a kind of vibration isolating effect removes
Dirt vibration isolation type concrete drums, solve existing agitator tank vibration isolating effect difference and using when be easy to produce asking for dust raising phenomenon
Topic.
The above technical problem is solved through the following technical scheme: a kind of potential energy water spray dedusting vibration isolation type concrete stirring
Tank, including tank body and blender, the tank body are equipped with feed inlet and concrete outlet, and the blender includes agitating shaft, setting
The stirring motor of stirring blade and driving stirring blade rotation on agitating shaft, which is characterized in that the tank body is equipped with vibration isolation
Foot, the feed inlet are located at the upper end of the tank body, are equipped with the water distribution circumferentially extended along feed inlet in the wall portion of the feed inlet
Ring, the water distribution are equipped with the hole for water spraying of perforation feed inlet, and the tank body is equipped with replenisher tank and transition water pot, and the water supply pipe is logical
It crosses the first check valve opened towards transition water pot to be connected to transition water pot, the transition water pot towards the cloth water ring by opening
The second one-way valve opened is connected to cloth water ring, and material potential energy recovering mechanism, the material potential energy recycling machine are equipped in the tank body
Structure includes the water vat being vertically arranged, the piston in water vat, the piston rod for stretching out water vat upward being connected on piston, is located at water vat
Reset spring that interior driving piston moves up and connection on the piston rod and the splicing plate that is located at immediately below feed inlet, institute
The rodless cavity for stating water vat is connected to by runner with the transition water pot.Setting vibration isolation foot is supported tank body, and vibration isolating effect is good.
When use transition water pot, water vat rodless cavity and runner in fill full water.The technical program is in use, can be using under material
Potential energy docking flitch when drop is impacted and splicing plate is driven to decline, and the decline of driving piston is so that in water vat when splicing plate declines
Water flow to transition water pot through runner the hydraulic pressure in transition water pot made to increase, the hydraulic pressure of transition water pot makes second single after rising
It is opened to valve, the water in transition water pot is flowed into after paring chamber and is discharged from spray head to dust wetting, is not easy to be raised after dust wetting
It rises and blows out, to realize reduction fugitive dust.Material does not strike reset spring in the space period of splicing plate and drives splicing plate
Rise and reset, the result of reset is so that the hydraulic pressure in transition water pot reduces, and second is single after the hydraulic pressure in transition water pot reduces
It closes the first check valve to valve to open, the water in replenisher tank adds in transition water pot, so that splicing plate receives shock next time
When transition water pot in water energy be enough driven out.
Preferably, stirring motor is connected in the water vat, the tank body is located at the space structure of the lower section of the water vat
At stirring space, the stirring blade is located in the stirring space.Compact layout is convenient.Concrete is not easily penetrated into agitating shaft
With bucket junction and cause to damage, and without being sealed.
The utility model further includes water spray reliability hoisting mechanism, and the water spray reliability hoisting mechanism includes described in closing
Whether the flashboard of feed inlet, the power mechanism of driving flashboard folding, detection piston reach the barrier gate switch in setting final position, inspection
Survey piston whether reach setting initial position open a sluice gate switch and control unit, barrier gate switch detects piston reach setting
Described control unit makes the power mechanism that the flashboard be driven to close when final position, opens a sluice gate switch and detects that piston arrival is set
Described control unit makes the power mechanism that the flashboard be driven to open when fixed initial position.It can be avoided material continuously to decline
It (being that splicing plate is not short by the time interval impacted) and the time for causing piston not reset, can not can so as to cause water
The phenomenon that spraying by ground generates.
Preferably, the flashboard can be connected to plug on the feed inlet in the horizontal direction, the power mechanism packet
It includes the driving flashboard and extracts the horizon bar of the feed inlet opening a sluice gate spring, being arranged on flashboard, the drive equipped with driving inclined-plane out
Dynamic flashboard is inserted into the drive block in the feed inlet and the driving cylinder of driving drive block lifting, and the horizon bar is connected to described
In driving inclined-plane.
As it is another preferably, the flashboard can be connected to plug the feed inlet, the power mechanism in the horizontal direction
The horizon bar opening a sluice gate spring, being arranged on flashboard, circumferential surface including driving the flashboard to extract the feed inlet out are connected to level
Driving flashboard on the end face of bar is inserted into the eccentric wheel in the feed inlet and the driving motor of driving eccentric wheel rotation.
Preferably, the runner is equipped with the slide opening section on the side wall of the tank body, sealing is set in the slide opening section
Home block is slidably connected, the barrier gate switchs and opens a sluice gate switch all and is the optoelectronic switch cooperated with the home block and is mounted on
On the side wall of the tank body.It is convenient when mounting arrangement switchs.
Preferably, the upper surface of the splicing plate is equipped with storing pit, table flexible is equipped in the storing pit
Surface layer, only periphery links together the superficial layer with the pit, and the water vat is equipped with and penetrates into the storing pit
Be located at below the superficial layer for the superficial layer to be jacked up when piston drops to the final position of setting and is made
The perpendicular mandril that the material being stored in storing pit is poured out.Can be avoided material moment, to strike power on splicing plate too small and lead
The problem of activation plug can not reliably decline.Improve reliability when work.
Preferably, the feed inlet is connected with buffering bucket.Material is overflowed from feed inlet when can prevent feed inlet from closing.
Preferably, the vibration isolation foot includes the compressed spring of rubber body and vulcanization in rubber body.It is not only able to
Vibration isolation, and corrosion phenomena will not be generated.
The utility model has an advantage that the potential energy to fall when can enter using material as power to drive water from charging
It mouthful sprays and to be dusted, not only good dustproof effect, and also low energy consumption when realizing dust-proof；Vibration isolating effect is good.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment one.
Fig. 2 is the structural schematic diagram of the utility model embodiment two.
In figure: tank body 1, concrete outlet 11, feed inlet 12, buffering bucket 13, cloth water ring 14, hole for water spraying 141, transition water pot
15, second one-way valve 151, replenisher tank 16, the first check valve 161, stirring space 17, blender 2, agitating shaft 21, stirring blade
22, stirring motor 23, water spray reliability hoisting mechanism 3, flashboard 31, horizon bar 311, power mechanism 32, open a sluice gate spring 321, partially
Heart wheel 322, driving motor 323, drive block 324, driving cylinder 325, driving inclined-plane 326, motor mounting rack 37, barrier gate switch
33, switch 34, control unit 35, home block 36, vibration isolation foot 4, rubber body 41, compressed spring 42, the recycling of material potential energy are opened a sluice gate
Mechanism 5, water vat 51, piston 52, piston rod 53, reset spring 54, splicing plate 55, storing pit 551, connecting rod 56, runner 57,
Slide opening section 571, superficial layer 58, perpendicular mandril 59.
Specific embodiment
The utility model is further described with embodiment with reference to the accompanying drawing.
Embodiment one, referring to Fig. 1, a kind of potential energy water spray dedusting vibration isolation type concrete drums, including tank body 1, blender 2
With water spray reliability hoisting mechanism 3.
The lower end of tank body 1 is equipped with vibration isolation foot 4 and concrete outlet 11.Vibration isolation foot 4 has three.Three vibration isolation feet 4 are in triangle
Shape distribution.Vibration isolation foot 4 includes the compressed spring 42 of rubber body 41 and vulcanization in rubber body.The roof of tank body 1 is equipped with
Feed inlet 12.Feed inlet 12 is connected with buffering bucket 13.Cloth water ring 14, transition water pot 15 and replenisher tank 16 are additionally provided on tank body 1.Cloth
Circumferentially extending of the water ring 14 along feed inlet 12.Cloth water ring 14 is located in the wall portion of feed inlet.Cloth water ring 14 is equipped with perforation feed inlet
Several hole for water sprayings 141.Hole for water spraying 141 is along the circumferentially distributed of feed inlet.Transition water pot 15 passes through the same water distribution of second one-way valve 151
Ring 14 is connected to.Second one-way valve 151 is towards opening in cloth water ring 14.Replenisher tank 16 is by the first check valve 161 with transition water pot
15 connections.First check valve 161 is towards opening in transition water pot 15.Material potential energy recovering mechanism 5 is additionally provided in tank body 1.Material
Potential energy recovering mechanism 5 includes water vat 51, piston 52, piston rod 53, reset spring 54, splicing plate 55 and the perpendicular mandril 59 being vertically arranged.
Water vat 51 is to be vertically arranged setting.Water vat 51 is connected on tank body by several connecting rods 56.Piston 52 is slidably and sealingly connected in water
In cylinder 51.Water vat is divided into rod chamber and rodless cavity by piston 52.Rodless cavity is connected to by runner 57 with transition water pot 15.Piston
Piston rod 53 is connected on 52.Piston rod 53 stretches out water vat 51 upward.Reset spring 54 is located in rodless cavity.Reset spring 54 is
Compressed spring.Reset spring 54 is for driving piston to move up and reset.Splicing plate 55 be connected to the upper end of piston rod 53 and
Positioned at the outside of water vat 51.Splicing plate 55 shelters from water vat 51 completely.Splicing plate 55 is located at the underface of feed inlet 12.Splicing plate
55 area projected downwards is greater than the opening area of feed inlet 12.The upper surface of splicing plate 55 is equipped with storing pit 551.Into
Flitch 55 is 1 meter or more with the drop between feed inlet 12.Superficial layer 58 flexible, specially rubber are equipped in storing pit 551
Glue-line.Only periphery links together superficial layer 58 with storing pit 551.Perpendicular mandril 59 has 4.The lower end of perpendicular mandril 59 is connected to
On the upper end of water vat 51.The upper end of perpendicular mandril 59 wears the lower section in storing pit 551 and being located at superficial layer 58.For working as
The perpendicular top that the superficial layer is jacked up when piston drops to the final position of setting and the material being stored in pit is poured out
Bar.
The space that tank body 1 is located at the lower section of water vat constitutes stirring space 17.Blender 2 includes agitating shaft 21, stirring blade
22 stirring motors 23 rotated with driving stirring blade.Agitating shaft 21 vertically extends.Stirring blade 22 is connected to stirring
On axis 21.Stirring blade 22 is located in stirring space 17.Stirring motor 23 is fixed in water vat 51.The power of stirring motor 23 is defeated
Shaft is linked together by retarder with stirring blade 22.
Water spray reliability hoisting mechanism 3 includes flashboard 31, power mechanism 32, barrier gate switch 33, opens a sluice gate switch 34, control list
Member 35 and home block 36.Flashboard 31 can be connected to plug in feed inlet 12 in the horizontal direction.Flashboard 31 is equipped with horizon bar
311。
Power mechanism 32 includes opening a sluice gate spring 321, eccentric wheel 322 and driving motor 323.Opening a sluice gate spring 321 is along level
The flexible pressure spring in direction.The telescopic direction for opening a sluice gate spring 321 is identical with the plug direction of flashboard 31.Open a sluice gate one end of spring 321
It links together with tank body, the protrusion of other end same level bar 311 links together.The circumferential surface of eccentric wheel 322 is connected to level
On the end face of bar 311.The power output shaft of driving motor 323 is linked together by shaft coupling with the rotation axis of eccentric wheel 322.
Driving motor 323 is stepper motor.Driving motor 323 is fixed on tank body 1 by motor mounting rack 37.Runner 57, which is equipped with, to be located at
Slide opening section 571 on the side wall 18 of tank body.Slide opening section 571 vertically extends.Home block 36 is slidably and sealingly connected in slide opening
In section 571.It barrier gate switch 33 and opens a sluice gate in the hole that switch 34 is all disposed on the side wall 18 of tank body.It barrier gate switch 33 and opens a sluice gate out
Closing 34 is all optoelectronic switch.Switch 34, home block 36 and driving motor 323 is opened a sluice gate all to be electrically connected with control unit 35.
Full water is filled in runner 57, water vat 41 and transition water pot 15 when original state and splicing plate 55 is located at highest order with the top of water vat
Wall abuts together.Piston position at this time is the setting initial position of piston and switch 34 is opened a sluice gate together in the bottom of home block 36
It is aligned and is opened a sluice gate switch 34 and detected.Open a sluice gate control unit Unit 35 driving eccentric rotation when switch 34 detects home block 36
It is (flashboard refers to open a sluice gate spring under the action of open) in the open state to move flashboard.Carry out concrete production when, material from
Feed inlet is poured into and is fallen on splicing plate 55, under the action of the shock that material falls is weight of the material accumulation in pit
Splicing plate moves down, splicing plate move down and drive piston to move down by piston rod so that water flow in water vat to runner so as to cause mistake
The hydraulic pressure crossed in water pot 15 rises, and when hydraulic pressure rises to setting value or more, i.e. piston has met or exceeded setting final position
When, home block 36 can be detected by barrier gate switch 33, and the control of control unit 35 is driven when barrier gate switch 33 detects home block 36
Dynamic motor rotates so that eccentric wheel 322 drives flashboard to close Lai Kou；Driving second is single when the hydraulic pressure of transition water pot 15 rises
It is opened to valve so that water in spray orifice from encountering in feed inlet 12.Further shock due to not no material and superficial layer 58 at this time
By perpendicular mandril 59 jack-up, material is poured out, and reset spring 54 drives piston reset and splicing plate is made to move up and reset, and is resetted
Result be hydraulic pressure decline in transition water pot 15, the hydraulic pressure of replenisher tank 16 is opened the first check valve two and is made in replenisher tank 16
Water adds to transition water pot 15 and fills full transition water pot, and home block 36 also declines and is staggered with barrier gate switch 33 and opens with barrier gate
Close 33 alignment.Then repeat above-mentioned movement, realize spray water while continuous charging it is dust-proof.In use process, moisturizing
Water level in tank lower than spray orifice control, be the top that drainage hole is located at replenisher tank water level so that the water in replenisher tank can not be through
Hole for water spraying sprays.Transition water pot is also below drainage hole, so that water will not be sprayed from drainage hole when interior filling full water in transition water pot
Out.
Embodiment two, with the difference of embodiment one are as follows:
Referring to fig. 2, power mechanism 32 includes opening a sluice gate spring 321, drive block 324 and driving cylinder 325.Open a sluice gate spring 321
Structure and set-up mode it is identical with embodiment one.Drive block 324 is equipped with driving inclined-plane 326.It is oblique that horizon bar 311 is connected to driving
On face 326.Driving cylinder 325 stretches along the vertical direction.Driving cylinder 325 links together with drive block 324 drives drive block
324 liftings.When driving cylinder 325 that drive block 324 is driven to rise, drive block 324 drives flashboard 31 to shut.When driving cylinder 325
Driving drive block 324, flashboard 31 is opened under the action of opening a sluice gate spring 321 when declining.
Claims (9)
- The dedusting vibration isolation type concrete drums 1. a kind of potential energy is sprayed water, including tank body and blender, the tank body are equipped with feed inlet And concrete outlet, the blender include agitating shaft, the stirring blade being arranged on agitating shaft and driving stirring blade rotation Stirring motor, which is characterized in that the tank body is equipped with vibration isolation foot, and the feed inlet is located at the upper end of the tank body, it is described into The cloth water ring circumferentially extended along feed inlet is equipped in the wall portion of material mouth, the water distribution is equipped with the hole for water spraying of perforation feed inlet, institute Tank body is stated equipped with replenisher tank and transition water pot, the water supply pipe passes through the same transitional water of the first check valve opened towards transition water pot Tank connection, the transition water pot is connected to by the second one-way valve opened towards the cloth water ring with cloth water ring, in the tank body Equipped with material potential energy recovering mechanism, the material potential energy recovering mechanism includes the water vat being vertically arranged, the piston in water vat, connection The reset spring and be connected to that piston rod, the driving piston in water vat for stretching out water vat upward on piston moves up Splicing plate that is on piston rod and being located at immediately below feed inlet, the rodless cavity of the water vat are connected by runner with the transition water pot It is logical.
- The dedusting vibration isolation type concrete drums 2. a kind of potential energy according to claim 1 is sprayed water, which is characterized in that stirring electricity Machine is connected in the water vat, and the space that the tank body is located at the lower section of the water vat constitutes stirring space, the stirring blade In the stirring space.
- The dedusting vibration isolation type concrete drums 3. a kind of potential energy according to claim 1 is sprayed water, which is characterized in that further include Water spray reliability hoisting mechanism, the water spray reliability hoisting mechanism include the flashboard for closing the feed inlet, flashboard are driven to open Whether power mechanism, the detection piston of conjunction reach the barrier gate switch in setting final position, whether detection piston reaches rising for setting Switch and control unit are opened a sluice gate in beginning position, and barrier gate switch detects described control unit when piston reaches the final position of setting Make the power mechanism that the flashboard be driven to close, opens a sluice gate switch and detect control when piston reaches the initial position of setting Unit makes the power mechanism that the flashboard be driven to open.
- The dedusting vibration isolation type concrete drums 4. a kind of potential energy according to claim 3 is sprayed water, which is characterized in that the lock Plate can be connected to plug on the feed inlet in the horizontal direction, the power mechanism include drive flashboard extraction described into The horizon bar of material mouth opening a sluice gate spring, being arranged on flashboard, the driving flashboard equipped with driving inclined-plane are inserted into the feed inlet The driving cylinder of drive block and driving drive block lifting, the horizon bar are connected in the driving inclined-plane.
- The dedusting vibration isolation type concrete drums 5. a kind of potential energy according to claim 3 is sprayed water, which is characterized in that the lock Plate can be connected to plug the feed inlet in the horizontal direction, and the power mechanism includes that the flashboard is driven to extract the charging out The horizon bar opening a sluice gate spring, being arranged on flashboard, the circumferential surface of mouth are connected to described in the insertion of the driving flashboard on the end face of horizon bar The driving motor of eccentric wheel and driving eccentric wheel rotation in feed inlet.
- The dedusting vibration isolation type concrete drums 6. a kind of potential energy according to claim 3 is sprayed water, which is characterized in that the stream Road is equipped with the slide opening section on the side wall of the tank body, sets sealing in the slide opening section and slidably connects home block, the pass Lock switchs and opens a sluice gate switch all and is the optoelectronic switch cooperated with the home block and is mounted on the side wall of the tank body.
- The dedusting vibration isolation type concrete drums 7. a kind of potential energy according to claim 1 is sprayed water, which is characterized in that described to connect The upper surface of flitch is equipped with storing pit, is equipped with superficial layer flexible in the storing pit, only periphery is same for the superficial layer The pit links together, and the water vat is equipped with the use being located at below the superficial layer penetrated into the storing pit The superficial layer is jacked up when dropping to the final position of setting when piston and the material being stored in storing pit is fallen Perpendicular mandril out.
- The dedusting vibration isolation type concrete drums 8. a kind of potential energy according to claim 1 is sprayed water, which is characterized in that it is described into Material mouth is connected with buffering bucket.
- The dedusting vibration isolation type concrete drums 9. a kind of potential energy according to claim 1 is sprayed water, which is characterized in that it is described every Vibration foot includes the compressed spring of rubber body and vulcanization in rubber body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721849392.4U CN208323783U (en) | 2017-12-26 | 2017-12-26 | A kind of potential energy water spray dedusting vibration isolation type concrete drums |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721849392.4U CN208323783U (en) | 2017-12-26 | 2017-12-26 | A kind of potential energy water spray dedusting vibration isolation type concrete drums |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208323783U true CN208323783U (en) | 2019-01-04 |
Family
ID=64788516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721849392.4U Expired - Fee Related CN208323783U (en) | 2017-12-26 | 2017-12-26 | A kind of potential energy water spray dedusting vibration isolation type concrete drums |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208323783U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108274627A (en) * | 2017-12-26 | 2018-07-13 | 龙游鑫业混凝土有限公司 | Potential energy water spray dedusting vibration isolation type concrete drums and concrete production method |
| CN110181688A (en) * | 2019-06-17 | 2019-08-30 | 滨州方新电脑有限公司 | A kind of cement mixer dust controlling terminal |
| CN110696182A (en) * | 2019-10-09 | 2020-01-17 | 广州京海科技有限公司 | Environment-friendly concrete mixer that stirring effect is good |
-
2017
- 2017-12-26 CN CN201721849392.4U patent/CN208323783U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108274627A (en) * | 2017-12-26 | 2018-07-13 | 龙游鑫业混凝土有限公司 | Potential energy water spray dedusting vibration isolation type concrete drums and concrete production method |
| CN108274627B (en) * | 2017-12-26 | 2019-12-27 | 龙游鑫业混凝土有限公司 | Potential energy water spray dust removal vibration isolation type concrete mixing tank |
| CN110181688A (en) * | 2019-06-17 | 2019-08-30 | 滨州方新电脑有限公司 | A kind of cement mixer dust controlling terminal |
| CN110181688B (en) * | 2019-06-17 | 2020-10-30 | 中材邦业(杭州)智能技术有限公司 | Cement mixer raise dust control terminal |
| CN110696182A (en) * | 2019-10-09 | 2020-01-17 | 广州京海科技有限公司 | Environment-friendly concrete mixer that stirring effect is good |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190104 Termination date: 20211226 |
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| CF01 | Termination of patent right due to non-payment of annual fee |