CN205704677U - A kind of Multi-stage stirring formula concrete central mix plant - Google Patents
A kind of Multi-stage stirring formula concrete central mix plant Download PDFInfo
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- CN205704677U CN205704677U CN201620615662.4U CN201620615662U CN205704677U CN 205704677 U CN205704677 U CN 205704677U CN 201620615662 U CN201620615662 U CN 201620615662U CN 205704677 U CN205704677 U CN 205704677U
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- rubble
- belt conveyer
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- cement
- stage stirring
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- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The utility model discloses a kind of Multi-stage stirring formula concrete central mix plant, including siccative feeding device, Multi-stage stirring device and control device, siccative feeding device is positioned at the top of Multi-stage stirring device, and siccative feeding device, Multi-stage stirring device all electrically connect with control device；Wherein, siccative feeding device includes cement transportation line, sand material pipeline and rubble pipeline, and cement, sand material and rubble enter belt conveyer after the pneumatic conveying of siccative feeding device, and are transported to Multi-stage stirring device by belt conveyer.This utility model uses two set agitator tanks setting up and down to be stirred concrete, and the concrete through twice stirring is sufficiently stirred for, and each composition is sufficiently mixed, improve the mobility of concrete, avoid concrete delivery service and be prone to the defect of caking molding, its simple in construction, it is easy to operation.
Description
Technical field:
This utility model relates to technical field of concrete production, is specifically related to a kind of Multi-stage stirring formula concrete-agitating dress
Put.
Background technology:
Concrete is one of contemporary topmost civil engineering material, and it is by a definite proportion by cementing material, aggregate and water
Example is prepared, through stirring molding of vibrating, and the artificial stone of maintenance under certain condition.Concrete stirring system is conventional in construction
Equipment, the aggregates such as cement, rubble, sand and other admixtures, additive and water be mixed and stirred for by by a certain percentage, becomes
For pouring out again after concrete mortar, after the shaping and drying that vibrates, it is concrete component.
Under normal circumstances, only one of which mixing drum on blender, the most only it is provided with an independent stir chamber in mixing drum,
The preparation completing slurry or concrete that can only be single, function singleness, practicality is not good enough, can not meet modern architecture work
The needs of journey, and concrete is merely through a whipping process, it is understood that there may be stir insufficient situation, easily produce caking, stream
The defects such as dynamic property difference.
Utility model content:
The purpose of this utility model is aiming at the deficiencies in the prior art, it is provided that a kind of Multi-stage stirring formula concrete-agitating dress
Put.
For achieving the above object, technology solution of the present utility model is as follows:
A kind of Multi-stage stirring formula concrete central mix plant, including siccative feeding device, Multi-stage stirring device and control dress
Putting, siccative feeding device is positioned at the top of Multi-stage stirring device, and siccative feeding device, Multi-stage stirring device are all electric with control device
Connect；Wherein, siccative feeding device includes cement transportation line, sand material pipeline and rubble pipeline, cement, sand material and broken
Stone enters belt conveyer after the pneumatic conveying of siccative feeding device, and is transported to Multi-stage stirring device by belt conveyer；
Multi-stage stirring device is two-stage agitating device, and including one-level agitator tank and two grades of agitator tanks, one-level agitator tank is positioned at two grades of stirrings
The surface of tank, one-level agitator tank top is provided with taper loading hopper by one-level adpting flange, and taper loading hopper is with defeated
The end sending belt feeder is the most corresponding, is provided with dust cover outside taper loading hopper, dust cover to the tail end of belt conveyer and
Taper loading hopper carries out hiding dust-proof, and taper loading hopper interior welds is magnetic screen cloth, and taper loading hopper stirs with one-level
Mix tank junction and be provided with the first changeover valve, be provided with the electronic beater mechanism of one-level outside one-level agitator tank, and set inside it
It is equipped with one-level crutcher and one-level ultrasonic stirrer；It is provided with the second rotation between one-level agitator tank, two grades of agitator tanks
Valve, is provided with second-stage electric beater mechanism outside two grades of agitator tanks, and it is internally provided with deuterostrophies agitator and two
Level ultrasonic stirrer；The bottom of two grades of agitator tanks is provided with concrete outlet, is provided with spiral discharging device, spiral shell at concrete outlet
Screwing out glassware to be driven by the motor being fixed in mounting seat, motor is connected with controlling device by connecting electric wire；Spiral discharging device
Including helical axis and the discharging rod being positioned on helical axis, spiral discharging device connects with transfer pipeline.
Multi-stage stirring device also includes, for water assembly, including the water pump being fixed in mounting seat for water assembly, and water pump has
The water supply conduit extended straight up, water supply conduit connects with one-level agitator tank, two grades of agitator tanks respectively, and water supply conduit is arranged
Having the first Pressure gauge, the second Pressure gauge, the first Pressure gauge is corresponding with one-level agitator tank, the second Pressure gauge and two grades of agitator tanks pair
Should；Water pump side connects also by water storage pipeline water tank, and water storage pipeline is provided with inlet valve, and water tank also has the
One outlet pipeline and the second outlet pipeline, the first outlet pipeline connects with one-level agitator tank, the second outlet pipeline and two grades of stirrings
Tank connects, and the second outlet pipeline is provided with the second flowing water Valve, the first outlet pipeline is provided with the first flowing water Valve.
Cement transportation line, sand material pipeline and rubble pipeline be respectively connecting to the first buffering chamber, the second buffering chamber with
And the 3rd buffering chamber, the first buffering chamber, the second buffering chamber and the 3rd buffering chamber lower part outlet are provided with Electromagnetic Control valve, often
Individual Electromagnetic Control valve bottom is provided with a belt conveyer scale, and Electromagnetic Control valve, belt conveyer scale all electrically connect with control device, control
The weighing data of device record belt conveyer scale processed also carries out cumulative calculation, and three belt conveyer scales store gravimetric values set in advance, and right
Falling material weighs, and once the weight of material of belt conveyer scale total weight reaches the gravimetric value pre-set, and controls device control
Make corresponding Electromagnetic Control valve to close, stop the supply of corresponding material；The bottom of three belt conveyer scales is additionally provided with receiver
The belt conveyer of material, material is delivered to Multi-stage stirring device by belt conveyer.
Cement transportation line includes that hopper accepted by cement, and cement accepts hopper for accepting the cement that transport vehicle is shipped, cement
The bottom accepting hopper is provided with the first inclined belt conveyer, and cement transportation to cement is stored by the first inclined belt conveyer
Storehouse, cement storage silo top is provided with cement drainage screen, and the bottom of cement storage silo is provided with cement air conveying line, cement
The first crusing robot it is additionally provided with on air conveying line.
Sand material pipeline includes that hopper accepted by sand material, and sand material accepts hopper for accepting the sand material that transport vehicle is shipped, sand material
The bottom accepting hopper is provided with the second inclined belt conveyer, and sand material is delivered to the storage of sand material by the second inclined belt conveyer
Storehouse, sand material storage silo top is provided with sand material drainage screen, and the bottom of sand material storage silo is provided with sand material air conveying line, sand material
The second crusing robot it is additionally provided with on air conveying line.
Rubble pipeline includes that rubble accepts hopper, and rubble accepts hopper for accepting the rubble that transport vehicle is shipped, rubble
The bottom accepting hopper is provided with the 3rd inclined belt conveyer, and rubble is delivered to rubble storage by the 3rd inclined belt conveyer
Storehouse, rubble storage silo top is provided with rubble drainage screen, and the bottom of rubble storage silo is provided with rubble air conveying line, rubble
The 3rd crusing robot it is additionally provided with on air conveying line.
First changeover valve and the second rotary valve structure are identical, all include that rotary shaft, rotary shaft outer cover are connected to axle sleeve,
Rotary shaft bottom connects has swingle, swingle end to be fixed with valve plates, and rotary shaft upper end connects with the output shaft driving motor
Connect, rotary shaft is further fixed on pulling handle.
First buffering chamber, the second buffering chamber and the 3rd buffering chamber are provided with high-order level-sensing device and low level level-sensing device,
High-order level-sensing device and low level level-sensing device all electrically connect with control device.
The beneficial effects of the utility model are: this utility model uses two set agitator tanks setting up and down to enter concrete
Row stirring, the concrete through twice stirring is sufficiently stirred for, and each composition is sufficiently mixed, and improves the mobility of concrete,
Avoid concrete delivery service and be prone to the defect of caking molding, its simple in construction, it is easy to operation.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of siccative pay-off；
Fig. 3 is the structural representation of the first changeover valve.
Detailed description of the invention:
Understandable in order to enable above-mentioned purpose of the present utility model, feature and advantage to become apparent from, the most right
Detailed description of the invention of the present utility model is described in detail.
As shown in Figure 1-2, Multi-stage stirring formula concrete central mix plant include siccative feeding device 4, Multi-stage stirring device with
And control device, siccative feeding device 4 is positioned at the top of Multi-stage stirring device, siccative feeding device 4, Multi-stage stirring device all with
Control device electrical connection；Wherein, siccative feeding device 4 includes cement transportation line 41, sand material pipeline 42 and rubble pipeline
43, cement, sand material and rubble enter belt conveyer 419 after the pneumatic conveying of siccative feeding device 4, and by belt conveyor
Machine 419 is transported to Multi-stage stirring device；Multi-stage stirring device is two-stage agitating device, including one-level agitator tank 13 and two grades of stirrings
Tank 21, one-level agitator tank 13 is positioned at the surface of two grades of agitator tanks 21, and one-level agitator tank 13 top is set by one-level adpting flange
Being equipped with taper loading hopper 11, taper loading hopper 11 is the most corresponding with the end of belt conveyer 419, outside taper loading hopper 11
Portion is provided with dust cover, and tail end and the taper loading hopper 11 of belt conveyer 419 are hidden dust-proof by dust cover, and taper is entered
Funnel 11 interior welds is magnetic screen cloth, and taper loading hopper 11 and one-level agitator tank 13 junction are provided with the first rotary valve
Door 12, the outside electronic beater mechanism of one-level that is provided with of one-level agitator tank 13, and its be internally provided with one-level crutcher and
One-level ultrasonic stirrer；It is provided with the second changeover valve 22, two grades of agitator tanks 21 between 13, two grades of agitator tanks 21 of one-level agitator tank
Outside is provided with second-stage electric beater mechanism, and it is internally provided with deuterostrophies agitator and two grades of ultrasonic stirrer；Two
The bottom of level agitator tank 21 is provided with concrete outlet, is provided with spiral discharging device 23, spiral discharging device 23 at concrete outlet
Being driven by the motor 25 being fixed in mounting seat 26, motor 25 is connected with controlling device by connecting electric wire 24；Spiral discharging device
23 include helical axis and the discharging rod being positioned on helical axis, and spiral discharging device 23 connects with transfer pipeline 28.
Multi-stage stirring device also includes, for water assembly, including the water pump 27 being fixed in mounting seat 26, water pump for water assembly
27 have the water supply conduit extended straight up, and water supply conduit connects with 13, two grades of agitator tanks 21 of one-level agitator tank respectively, send water
Being provided with first Pressure gauge the 31, second Pressure gauge 33 on pipeline, the first Pressure gauge is corresponding with one-level agitator tank 13, the second Pressure gauge
Corresponding with two grades of agitator tanks 21；Water pump 27 side also by water storage pipeline connect have water tank 36, water storage pipeline is provided with into
Penstock 37, water tank 36 also has the first outlet pipeline 32 and the second outlet pipeline 34, and the first outlet pipeline 32 stirs with one-level
Mixing tank 13 to connect, the second outlet pipeline 34 connects with two grades of agitator tanks 21, and the second outlet pipeline 34 is provided with the second outlet valve
Door 35, the first outlet pipeline 32 is provided with the first flowing water Valve.
Cement transportation line 41, sand material pipeline 42 and rubble pipeline 43 are respectively connecting to the first buffering chamber 415, second
Buffering chamber 416 and the 3rd buffering chamber 417, first buffering chamber the 415, second buffering chamber 416 and the 3rd buffering chamber 417 bottom go out
Mouth is provided with Electromagnetic Control valve 152, and each Electromagnetic Control valve 152 bottom is provided with a belt conveyer scale 418, Electromagnetic Control
Valve 152, belt conveyer scale all electrically connect with control device, control the weighing data of device record belt conveyer scale 418 and carry out accumulative meter
Calculating, three belt conveyer scales 418 store gravimetric value set in advance, and weigh falling material, and once belt conveyer scale 418 is accumulative claims
The weight of material of amount reaches the gravimetric value pre-set, and controls the device corresponding Electromagnetic Control valve 152 of control and closes, stops
The supply of corresponding material；The bottom of three belt conveyer scales 418 is additionally provided with the belt conveyer 419 accepting material, belt conveyer
Material is delivered to Multi-stage stirring device by 419.
First buffering chamber the 415, second buffering chamber 416 and the 3rd buffering chamber 417 be provided with high-order level-sensing device 151 and
Low level level-sensing device, high-order level-sensing device 151 and low level level-sensing device all electrically connect with control device.
Cement transportation line 41 includes that hopper 411 accepted by cement, and cement accepts hopper 411 for accepting the water that transport vehicle is shipped
Mud, the bottom of cement undertaking hopper 411 is provided with the first inclined belt conveyer, and the first inclined belt conveyer is by cement transportation
To cement storage silo 412, cement storage silo 412 top is provided with cement drainage screen, and the bottom of cement storage silo 412 is provided with water
Mud air conveying line 414, cement air conveying line 414 is additionally provided with the first crusing robot 413.
Sand material pipeline 42 includes that hopper accepted by sand material, and sand material accepts hopper for accepting the sand material that transport vehicle is shipped, sand
Material is accepted the bottom of hopper and is provided with the second inclined belt conveyer, and sand material is delivered to sand material and deposits by the second inclined belt conveyer
Warehouse, sand material storage silo top is provided with sand material drainage screen, and the bottom of sand material storage silo is provided with sand material air conveying line, sand
It is additionally provided with the second crusing robot on material air conveying line.
Rubble pipeline 43 includes that rubble accepts hopper, and rubble is accepted hopper and is used for accepting the rubble that transport vehicle is shipped, broken
Stone is accepted the bottom of hopper and is provided with the 3rd inclined belt conveyer, and rubble is delivered to rubble and deposits by the 3rd inclined belt conveyer
Warehouse, rubble storage silo top is provided with rubble drainage screen, and the bottom of rubble storage silo is provided with rubble air conveying line, broken
The 3rd crusing robot it is additionally provided with on stone air conveying line.
As it is shown on figure 3, the first changeover valve and the second rotary valve structure are identical, all include rotary shaft 124, rotary shaft
124 outer cover are connected to axle sleeve 123, and rotary shaft 124 bottom connects has swingle 125, swingle 125 end to be fixed with valve plates
126, rotary shaft 124 upper end is connected with the output shaft driving motor 121, and rotary shaft 124 is further fixed on pulling handle 122.
Described embodiment is in order to illustrative this utility model, not for limiting this utility model.Any this area
Described embodiment all can be modified by technical staff under spirit and the scope of the present utility model, therefore this practicality
Novel rights protection scope, should be as listed by claim of the present utility model.
Claims (8)
1. a Multi-stage stirring formula concrete central mix plant, it is characterised in that: include that siccative feeding device (4), Multi-stage stirring fill
Putting and control device, siccative feeding device (4) is positioned at the top of Multi-stage stirring device, siccative feeding device (4), Multi-stage stirring
Device all electrically connects with control device；Wherein, siccative feeding device (4) includes cement transportation line (41), sand material pipeline (42)
And rubble pipeline (43), cement, sand material and rubble enter belt conveyor after the pneumatic conveying of siccative feeding device (4)
Machine (419), and it is transported to Multi-stage stirring device by belt conveyer (419)；Multi-stage stirring device is two-stage agitating device, including
One-level agitator tank (13) and two grades of agitator tanks (21), one-level agitator tank (13) is positioned at the surface of two grades of agitator tanks (21), one-level
Agitator tank (13) top is provided with taper loading hopper (11), taper loading hopper (11) and conveying skin by one-level adpting flange
The end of band machine (419) is the most corresponding, and taper loading hopper (11) is outside is provided with dust cover, and dust cover is to belt conveyer
(419) tail end and taper loading hopper (11) carry out hiding dust-proof, and taper loading hopper (11) interior welds is magnetic screen cloth,
Taper loading hopper (11) and one-level agitator tank (13) junction are provided with the first changeover valve (12), and one-level agitator tank (13) is outward
Portion is provided with the electronic beater mechanism of one-level, and it is internally provided with one-level crutcher and one-level ultrasonic stirrer；One-level
Being provided with the second changeover valve (22) between agitator tank (13), two grades of agitator tanks (21), two grades of agitator tank (21) outsides are provided with
Second-stage electric beater mechanism, and it is internally provided with deuterostrophies agitator and two grades of ultrasonic stirrer；Two grades of agitator tanks
(21) bottom is provided with concrete outlet, is provided with spiral discharging device (23) at concrete outlet, spiral discharging device (23) by
The motor (25) being fixed in mounting seat (26) drives, and motor (25) is connected with controlling device by connecting electric wire (24)；Spiral
Discharger (23) includes helical axis and the discharging rod being positioned on helical axis, and spiral discharging device (23) connects with transfer pipeline (28).
A kind of Multi-stage stirring formula concrete central mix plant the most according to claim 1, it is characterised in that: Multi-stage stirring device
Also including, for water assembly, including the water pump (27) being fixed in mounting seat (26) for water assembly, water pump (27) has straight up
The water supply conduit extended, water supply conduit connects with one-level agitator tank (13), two grades of agitator tanks (21) respectively, and water supply conduit is arranged
Having the first Pressure gauge (31), the second Pressure gauge (33), the first Pressure gauge is corresponding with one-level agitator tank (13), the second Pressure gauge and two
Level agitator tank (21) is corresponding；Water pump (27) side connects also by water storage pipeline water tank (36), and water storage pipeline is provided with
Inlet valve (37), water tank (36) also has the first outlet pipeline (32) and the second outlet pipeline (34), the first outlet pipeline
(32) connecting with one-level agitator tank (13), the second outlet pipeline (34) connects with two grades of agitator tanks (21), the second outlet pipeline
(34) being provided with the second flowing water Valve (35) on, the first outlet pipeline is provided with the first flowing water Valve on (32).
A kind of Multi-stage stirring formula concrete central mix plant the most according to claim 1, it is characterised in that: cement transportation line
(41), sand material pipeline (42) and rubble pipeline (43) are respectively connecting to the first buffering chamber (415), the second buffering chamber
(416) and the 3rd buffering chamber (417), under the first buffering chamber (415), the second buffering chamber (416) and the 3rd buffering chamber (417)
Portion's outlet is provided with Electromagnetic Control valve (152), and each Electromagnetic Control valve (152) bottom is provided with a belt conveyer scale
(418), Electromagnetic Control valve (152), belt conveyer scale all electrically connect with control device, control the title of device record belt conveyer scale (418)
Amount data also carry out cumulative calculation, and three belt conveyer scales (418) store gravimetric value set in advance, and claim falling material
Amount, once the weight of material of belt conveyer scale (418) total weight reaches the gravimetric value pre-set, and controls device and controls corresponding
Electromagnetic Control valve (152) is closed, and stops the supply of corresponding material；The bottom of three belt conveyer scales (418) is additionally provided with receiver
The belt conveyer (419) of material, material is delivered to Multi-stage stirring device by belt conveyer (419).
A kind of Multi-stage stirring formula concrete central mix plant the most according to claim 1, it is characterised in that: cement transportation line
(41) including that hopper (411) accepted by cement, cement is accepted hopper (411) and is used for accepting the cement that transport vehicle is shipped, and cement is accepted
The bottom of hopper (411) is provided with the first inclined belt conveyer, and cement transportation is deposited by the first inclined belt conveyer to cement
Warehouse (412), cement storage silo (412) top is provided with cement drainage screen, and the bottom of cement storage silo (412) is provided with cement
Air conveying line (414), cement air conveying line (414) is additionally provided with the first crusing robot (413).
A kind of Multi-stage stirring formula concrete central mix plant the most according to claim 1, it is characterised in that: sand material pipeline
(42) including that hopper accepted by sand material, sand material is accepted hopper and is used for accepting the sand material that transport vehicle is shipped, and the bottom of hopper accepted by sand material
Being provided with the second inclined belt conveyer, sand material is delivered to sand material storage silo, sand material storage silo by the second inclined belt conveyer
Top is provided with sand material drainage screen, and the bottom of sand material storage silo is provided with sand material air conveying line, sand material air conveying line
On be additionally provided with the second crusing robot.
A kind of Multi-stage stirring formula concrete central mix plant the most according to claim 1, it is characterised in that: rubble pipeline
(43) including that rubble accepts hopper, rubble is accepted hopper and is used for accepting the rubble that transport vehicle is shipped, and rubble accepts the bottom of hopper
Being provided with the 3rd inclined belt conveyer, rubble is delivered to rubble storage silo, rubble storage silo by the 3rd inclined belt conveyer
Top is provided with rubble drainage screen, and the bottom of rubble storage silo is provided with rubble air conveying line, rubble air conveying line
On be additionally provided with the 3rd crusing robot.
A kind of Multi-stage stirring formula concrete central mix plant the most according to claim 1, it is characterised in that: the first changeover valve
Identical with the second rotary valve structure, all include that rotary shaft (124), rotary shaft (124) outer cover are connected to axle sleeve (123), rotate
Axle (124) bottom connects has swingle (125), swingle (125) end to be fixed with valve plates (126), rotary shaft (124) upper end
It is connected with the output shaft driving motor (121), rotary shaft (124) is further fixed on pulling handle (122).
A kind of Multi-stage stirring formula concrete central mix plant the most according to claim 3, it is characterised in that: the first buffering chamber
(415), the second buffering chamber (416) and the 3rd buffering chamber (417) are provided with high-order level-sensing device (151) and low level material position
Meter, high-order level-sensing device (151) and low level level-sensing device all electrically connect with control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620615662.4U CN205704677U (en) | 2016-06-17 | 2016-06-17 | A kind of Multi-stage stirring formula concrete central mix plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620615662.4U CN205704677U (en) | 2016-06-17 | 2016-06-17 | A kind of Multi-stage stirring formula concrete central mix plant |
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| Publication Number | Publication Date |
|---|---|
| CN205704677U true CN205704677U (en) | 2016-11-23 |
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ID=57315162
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620615662.4U Expired - Fee Related CN205704677U (en) | 2016-06-17 | 2016-06-17 | A kind of Multi-stage stirring formula concrete central mix plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105881739A (en) * | 2016-06-17 | 2016-08-24 | 佛山市联智新创科技有限公司 | Multistage-stirring concrete stirring device |
-
2016
- 2016-06-17 CN CN201620615662.4U patent/CN205704677U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105881739A (en) * | 2016-06-17 | 2016-08-24 | 佛山市联智新创科技有限公司 | Multistage-stirring concrete stirring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Guo Zhoucai Inventor after: Li Caidong Inventor after: Wei Jian Inventor after: Huang Hongdan Inventor before: Fu Shuzhen |
|
| CB03 | Change of inventor or designer information | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170714 Address after: 530409, the Guangxi Zhuang Autonomous Region, Binyang County, Nanning new Liao village, chicken mother Ridge Seven Mile junction Patentee after: Guangxi Binyang Jianhua Concrete Co., Ltd. Address before: 528200 Guangdong Province Nanhai District of Foshan City, Guicheng Summer East is Wai Industrial Zone Foshan City Lianzhi Science & Technology Co Ltd Patentee before: FOSHAN LIANZHI XINCHUANG TECHNOLOGY CO., LTD. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20200617 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |