CN210500833U - Concrete mixing device for building site - Google Patents
Concrete mixing device for building site Download PDFInfo
- Publication number
- CN210500833U CN210500833U CN201921256810.8U CN201921256810U CN210500833U CN 210500833 U CN210500833 U CN 210500833U CN 201921256810 U CN201921256810 U CN 201921256810U CN 210500833 U CN210500833 U CN 210500833U
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- Prior art keywords
- concrete
- stirring
- rotating shaft
- belt pulley
- bevel gear
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- 238000003756 stirring Methods 0.000 claims abstract description 110
- 230000005540 biological transmission Effects 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims description 15
- 238000010276 construction Methods 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 8
- 238000007599 discharging Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to the technical field of building equipment, in particular to a concrete stirring device for a building site, which comprises a fixed plate, wherein a rotating shaft of a driving motor passes through the fixed plate to be fixedly connected with a transmission shaft, the transmission shaft is provided with a first belt pulley, the first belt pulley is connected with a second belt pulley through a transmission belt, the second belt pulley is arranged on the first rotating shaft, a third belt pulley is connected with a fourth belt pulley through the transmission belt, the fourth belt pulley is arranged on the second rotating shaft, a stirring chamber is arranged in a stirring box, and the bottom end of the transmission shaft passes through the fixed plate to be fixedly connected with a stirring rod; the utility model discloses a set up the concrete quantity that two agitator can increase the stirring, can carry out twice stirring to the concrete through setting up agitator tank and agitator, make the even thorough of concrete mixing, guarantee the quality of concrete after the stirring, hold the device and can conveniently take the use to the concrete after the stirring through setting up the concrete.
Description
Technical Field
The utility model relates to a construction equipment technical field especially relates to a concrete mixing device for building site.
Background
Concrete, referred to as concrete for short, is a general term for engineering composite materials formed by cementing aggregates into a whole by cementing materials, the term concrete generally refers to cement used as cementing materials, sand and stone used as aggregates are matched with water (which may contain additives and admixtures) according to a certain proportion, and the cement concrete obtained by stirring is also common concrete, which is one of the essential materials in the construction process, while the concrete stirring device used in the construction of the existing construction site can not fully and uniformly stir the concrete, so that the quality of the concrete is reduced, the quantity of the concrete stirred by the existing concrete stirring device can not meet the quantity of the concrete required by the construction site, and after the concrete stirring of the existing concrete stirring device is finished, the operation is inconvenient when workers take out and ship the stirred concrete for use, need manually take out the concrete after the stirring and ship, waste time and energy, influence work efficiency.
Disclosure of Invention
The utility model overcomes above-mentioned prior art's is not enough, provides a concrete mixing device for building site.
The technical scheme of the utility model: a concrete mixing device for construction sites comprises a fixing plate, wherein a driving motor is arranged at the upper end of the fixing plate and is arranged in a motor protection box, a rotating shaft of the driving motor penetrates through the fixing plate to be fixedly connected with a transmission shaft, the upper end and the lower end of the transmission shaft are respectively connected with the inner wall of the fixing plate through bearings, a first belt pulley is arranged on the transmission shaft and is connected with a second belt pulley through a transmission belt, the second belt pulley is arranged on the first rotating shaft, the first rotating shaft is arranged at the left side inside the fixing plate, a third belt pulley is arranged on the transmission shaft and is positioned below the first belt pulley, the third belt pulley is connected with a fourth belt pulley through the transmission belt, the fourth belt pulley is arranged on the second rotating shaft, the second rotating shaft is arranged at the right side inside the fixing plate, and the left end and the right end of the bottom of the fixing plate are respectively, one end of the first rotating shaft and one end of the second rotating shaft are respectively connected with the inner wall at the top end of the fixed plate through bearings, the other end of the first rotating shaft and the other end of the second rotating shaft penetrate through the fixed plate and are arranged in the stirring barrel, the left end and the right end of the part of the first rotating shaft and the second rotating shaft, which are positioned in the stirring barrel, are respectively provided with a plurality of first stirring columns in an array manner, the left end and the right end of the upper surface of the supporting plate are arranged in the stirring barrel, the middle part of the supporting plate is provided with an opening, a stirring box is arranged in the opening, a stirring chamber is arranged in the stirring box, the bottom end of the transmission shaft penetrates through the fixed plate and is fixedly connected with the stirring rod, one end of the stirring rod is fixedly connected with the transmission shaft, the other end of the stirring rod penetrates through the stirring, both ends are provided with a set of support column respectively about the case upper surface is placed to the concrete, support column one end is placed the case with the concrete and is linked to each other, and both ends fixed connection about the other end and backup pad bottom.
Furthermore, the bottom ends of the parts, located in the stirring barrel, of the first rotating shaft and the second rotating shaft are fixedly connected with a first bevel gear, the first bevel gear is arranged in a protection box, the left end of the first bevel gear is meshed with a second bevel gear, the second bevel gear is connected with a transmission rod, one end of the transmission rod is connected with the second bevel gear, the other end of the transmission rod penetrates through the protection box and is fixedly connected with a second stirring column, the right end of the first bevel gear is meshed with a third bevel gear, the third bevel gear is connected with the transmission rod, one end of the transmission rod is connected with the third bevel gear, and the other end of the transmission rod penetrates through the protection box and is fixedly connected with the second.
Further, the concrete is placed case surface right-hand member slope and is provided with the discharging pipe, discharging pipe one end is placed the case intercommunication with the concrete, and the other end holds the device with the concrete and links to each other, the concrete holds the device and includes the standing groove, discharging pipe and standing groove intercommunication, the inside board of placing that is provided with of standing groove, it is provided with a plurality of expanding spring to place the board bottom, expanding spring one end with place the board bottom and link to each other, the other end and the inside bottom fixed connection of standing groove, both ends are provided with a baffle respectively about placing the board upper surface, the baffle lower part of placing board upper surface left end is opened there is the discharge gate.
Furthermore, a material leaking pipe is arranged at the bottom end of the stirring barrel, one end of the material leaking pipe is communicated with the stirring barrel, and the other end of the material leaking pipe penetrates through the stirring box to be communicated with the stirring chamber.
Furthermore, the bottom of the stirring chamber is semicircular, and the stirring table is of a semicircular structure.
Furthermore, a discharge hopper is arranged at the top of the stirring barrel.
Furthermore, a group of supporting seats are respectively arranged at the left end and the right end of the bottom of the concrete placing box.
The utility model discloses following beneficial effect has for prior art:
1) the utility model increases the quantity of the stirred concrete, can satisfy a large amount of concrete needed to be used on the site of a building site, when in use, the concrete which is matched according to a certain proportion and needs to be stirred is put into the stirring barrel through the discharging hopper, the driving rod is driven to operate through the driving motor, the second belt pulley and the fourth belt pulley are driven to operate under the action of the driving belt through the first belt pulley and the third belt pulley, so that the first rotating shaft and the second rotating shaft operate, the concrete in the stirring barrel can be stirred, then the concrete in the stirring barrel falls into the stirring box through the leakage pipe, the stirring rod connected through the driving rod carries out secondary stirring treatment on the concrete, the uniformity and the thoroughness of the concrete stirring can be ensured, and the second stirring column can carry out longitudinal operation through the matching use of the three bevel gears in the protection box, the stirring rod and the second stirring column are used for carrying out longitudinal and transverse double stirring in the stirring box, so that the stirring efficiency of the concrete can be improved, a better stirring effect can be achieved, and the quality of the concrete can be improved;
2) the utility model discloses a concrete that sets up holds device, when the staff transports the use to the concrete after the stirring, after the concrete on the place plate is tak eoff away by the staff in falling the standing groove through the discharging pipe, expanding spring drives and places the board and reset, make discharge gate and discharging pipe butt joint on placing the baffle of board upper end setting, make the concrete of placing the incasement automatically fall in the standing groove, the function of automatic supply has been realized, save the manual concrete after the stirring of staff and take, time saving and labor saving, and the work efficiency is improved.
The utility model discloses.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic diagram of the internal structure of the protection box of the present invention.
FIG. 1-fixed plate; 2-driving the motor; 3, driving a shaft; 4-a first pulley; 5-a transmission belt; 6-a second pulley; 7-first rotation; 8-a third pulley; 9-a fourth pulley; 10-a second rotating shaft; 11-a stirring barrel; 12-a first stirred column; 13-a support plate; 14-a stirring box; 15-a stirring chamber; 16-a stirring rod; 17-stirring blades; 18-a stirring table; 19-concrete placing box; 20-a support column; 21-a first bevel gear; 22-a protective box; 23-a second bevel gear; 24-a transmission rod; 25-a second stirred column; 26-a third bevel gear; 27-a discharge pipe; 28-concrete containment means; 29-a leakage pipe; 30-a discharge hopper; 31-a support seat; 281-placing grooves; 282-placing plate; 283-a telescopic spring; 284-a baffle; 285-discharge hole.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Detailed description of the invention
Referring to fig. 1 and 2, the concrete mixing device for the construction site disclosed in this embodiment includes a fixing plate 1, a driving motor 2 is disposed at the upper end of the fixing plate 1, the driving motor 2 is disposed in a motor protection box, a rotating shaft of the driving motor 2 penetrates through the fixing plate 1 and is fixedly connected with a transmission shaft 3, the upper and lower ends of the transmission shaft 3 are respectively connected with the inner wall of the fixing plate 1 through bearings, a first belt pulley 4 is disposed on the transmission shaft 3, the first belt pulley 4 is connected with a second belt pulley 6 through a driving belt 5, the second belt pulley 6 is disposed on a first rotating shaft 7, the first rotating shaft 7 is disposed at the left side inside the fixing plate 1, a third belt pulley 8 is disposed below the first belt pulley 4 on the transmission shaft 3, the third belt pulley 8 is connected with a fourth belt pulley 9 through the driving belt 5, the fourth belt pulley 9 is arranged on a second rotating shaft 10, the second rotating shaft 10 is arranged on the right side in the fixed plate 1, the left end and the right end of the bottom of the fixed plate 1 are respectively and fixedly connected with a stirring barrel 11, one end of the first rotating shaft 7 and one end of the second rotating shaft 10 are respectively connected with the inner wall of the top end of the fixed plate 1 through bearings, the other end of the first rotating shaft 7 and the other end of the second rotating shaft 10 penetrate through the fixed plate 1 and are arranged in the stirring barrel 11, a plurality of first stirring columns 12 are respectively arranged at the left end and the right end of the part, located in the stirring barrel 11, of the first rotating shaft 7 and the second rotating shaft 10 in an array mode, the stirring barrel 11 is provided with the left end and the right end of the upper surface of a supporting plate 13, an opening is arranged in the middle of the supporting plate 13, a stirring box 14 is arranged, the other end of the stirring rod 16 penetrates through the stirring box 14 and is arranged in the stirring chamber 15, the left end and the right end of the part of the stirring rod 16 in the stirring chamber 15 are respectively provided with a plurality of stirring blades 17 in an array mode, the bottom end of the stirring rod 16 is fixedly connected with the stirring table 18, the bottom end of the stirring rod 14 is communicated with the concrete placing box 19 through a blanking pipe, the left end and the right end of the upper surface of the concrete placing box 19 are respectively provided with a group of supporting columns 20, one end of each supporting column 20 is connected with the concrete placing box 19, the other end of each supporting column is fixedly connected with the left end and the right end of the bottom of the supporting plate 13, concrete which is matched according to a certain proportion is placed into the stirring barrel 11 from the material placing hopper 30, the driving motor 2 is started through a control switch, the driving shaft 3 runs when the driving motor 2 runs, the first belt pulley 4 and the third belt, thereby drive first axis of rotation 7 and the operation of second axis of rotation 10, the first churn 12 of installation carries out preliminary stirring to the concrete on the part that is located agitator 11 through first axis of rotation 7 and second axis of rotation 10, later the concrete falls into the teeter chamber 15 in agitator tank 14 through hourglass material pipe 29, and transmission shaft 3 and puddler 16 fixed connection, drive puddler 16 when transmission shaft 3 operates the operation, stirring blade 17 through on the puddler 16 carries out the secondary stirring to the concrete, can guarantee the abundant thorough of concrete mixing through twice stirring, and driving motor 2 can stir the concrete in agitator tank 11 and the agitator tank 14 simultaneously, promote stirring efficiency, and can increase the concrete quantity of stirring through setting up two agitator tanks 11, can satisfy the demand that the building site concrete used.
Detailed description of the invention
In this embodiment, based on the first embodiment, referring to fig. 2, specifically, the bottom ends of the portions of the first rotating shaft 7 and the second rotating shaft 10 located in the stirring barrel 11 are fixedly connected to a first bevel gear 21, the first bevel gear 21 is disposed in a protective box 22, the left end of the first bevel gear 21 is engaged with a second bevel gear 23, the second bevel gear 23 is connected to a transmission rod 24, one end of the transmission rod 24 is connected to the second bevel gear 23, the other end of the transmission rod passes through the protective box 22 and is fixedly connected to a second stirring column 25, the right end of the first bevel gear 21 is engaged with a third bevel gear 26, the third bevel gear 26 is connected to the transmission rod 24, one end of the transmission rod 24 is connected to the third bevel gear 26, the other end of the transmission rod passes through the protective box 22 and is fixedly connected to the second stirring column 25, when the stirring rod 16 rotates, the first bevel gear 21 in the protective box 22 can be driven to rotate, can make second bevel gear 23 and third bevel gear 26 rotate through first bevel gear 21, the transfer line 24 that links to each other through second bevel gear 23 and third bevel gear 26 can make second stirring post 25 realize fore-and-aft stirring function in agitator 11, can realize carrying out horizontal and fore-and-aft stirring work respectively to the concrete in agitator 11 through first stirring post 12 and second stirring post 25, can improve the stirring efficiency of concrete, reach better stirring effect, can improve the concrete quality.
Detailed description of the invention
In this embodiment, on the basis of the first embodiment, as shown in fig. 1, specifically, a discharging pipe 27 is obliquely disposed at the right end of the outer surface of the concrete placing box 19, one end of the discharging pipe 27 is communicated with the concrete placing box 19, the other end of the discharging pipe 27 is connected with the concrete placing device 28, the concrete placing device 28 includes a placing groove 281, the discharging pipe 27 is communicated with the placing groove 281, a placing plate 282 is disposed inside the placing groove 281, a plurality of extension springs 283 are disposed at the bottom end of the placing plate 282, one end of each extension spring 283 is connected with the bottom end of the placing plate 282, the other end of each extension spring 283 is fixedly connected with the bottom end of the placing groove 281, a baffle 284 is disposed at each of the left and right ends of the upper surface of the placing plate 282, a discharge hole 285 is opened at the lower portion of the baffle 284 at the left end of the upper surface of the, concrete falling into the concrete placing box 19 through a blanking pipe falls onto the placing plate 282 in the placing groove 281 through a discharging pipe, when the concrete is taken, the quantity of the concrete on the placing plate 282 is reduced, the expansion spring 283 is reduced by the pressure of the placing plate 282 and resets, the placing plate 282 is driven to move upwards, the baffle 284 on the placing plate 282 is driven to move upwards, when the discharging pipe 27 communicated with the placing groove 281 is butted with a discharging pipe 285 on the baffle 284, the concrete falls into the placing groove 281 from the concrete placing box 19 again, the automatic concrete supplementing function after stirring is realized, convenience is brought to people to carry and use the stirred concrete, the trouble of taking the concrete after stirring manually is omitted, time and labor are saved, and the working efficiency is improved.
Detailed description of the invention
In this embodiment, on the basis of the first specific implementation mode, as shown in fig. 1, specifically, a material leaking pipe 29 is arranged at the bottom end of the stirring barrel 11, one end of the material leaking pipe 29 is communicated with the stirring barrel 11, the other end of the material leaking pipe passes through the stirring box 14 and is communicated with the stirring chamber 15, and the concrete in the stirring barrel 11 can be sent into the stirring chamber 15 in the stirring box 14 through the material leaking pipe 29 to be secondarily stirred, so that the stirring effect of the concrete is ensured.
Detailed description of the invention
In this embodiment, on the basis of the first embodiment, as shown in fig. 1, specifically, the bottom of the mixing chamber 15 is semicircular, the mixing table 18 is semicircular, and the semicircular mixing table 18 and the mixing chamber 15 with the semicircular bottom can ensure that no mixing dead angle occurs when mixing the concrete in the mixing box 14, so that the concrete can be sufficiently and uniformly mixed.
Detailed description of the invention
In this embodiment, on the basis of the first embodiment, as shown in fig. 1, specifically, a discharge hopper 30 is disposed at the top of the mixing tank 11, and concrete mixed in a certain proportion can be placed into the mixing tank 11 through the discharge hopper 30 for mixing.
Detailed description of the invention
In this embodiment, on the basis of the first embodiment, as shown in the figure, specifically, a set of support seats 31 is respectively disposed at the left end and the right end of the bottom of the concrete placing box 19, and the stability of the equipment during operation can be ensured by disposing the support seats 31.
The above embodiments are merely illustrative of the present patent and do not limit the scope of the patent, and those skilled in the art can make modifications to the parts thereof without departing from the spirit and scope of the patent.
Claims (7)
1. The utility model provides a concrete mixing device for building site which characterized in that: comprises a fixing plate (1), a driving motor (2) is arranged at the upper end of the fixing plate (1), the driving motor (2) is arranged in a motor protection box, the rotating shaft of the driving motor (2) penetrates through the fixing plate (1) and a transmission shaft (3) to be fixedly connected, the upper end and the lower end of the transmission shaft (3) are respectively connected with the inner wall of the fixing plate (1) through bearings, a first belt pulley (4) is arranged on the transmission shaft (3), the first belt pulley (4) is connected with a second belt pulley (6) through a transmission belt (5), the second belt pulley (6) is arranged on a first rotating shaft (7), the first rotating shaft (7) is arranged at the left side inside the fixing plate (1), a third belt pulley (8) is arranged below the first belt pulley (4) on the transmission shaft (3), and the third belt pulley (8) is connected with a fourth belt pulley (9) through the transmission belt (5), the fourth belt pulley (9) is arranged on a second rotating shaft (10), the second rotating shaft (10) is arranged on the right side in the fixed plate (1), the left end and the right end of the bottom of the fixed plate (1) are fixedly connected with a stirring barrel (11) respectively, one end of the first rotating shaft (7) and one end of the second rotating shaft (10) are connected with the inner wall of the top end of the fixed plate (1) through bearings respectively, the other end of the first rotating shaft penetrates through the fixed plate (1) and is arranged in the stirring barrel (11), the left end and the right end of the part of the first rotating shaft (7) and the second rotating shaft (10) which are positioned in the stirring barrel (11) are respectively provided with a plurality of first stirring columns (12) in an array mode, the stirring barrel (11) is provided with the left end and the right end of the upper surface of a supporting plate (13), the middle part of the supporting plate (13) is provided with an, fixed plate (1) and puddler (16) fixed connection are passed to transmission shaft (3) bottom, puddler (16) one end and transmission shaft (3) fixed connection, the other end pass agitator tank (14) set up inside teeter chamber (15), both ends are provided with a plurality of stirring vane (17) respectively in the array about the part that puddler (16) are located teeter chamber (15), the bottom and the stirring platform (18) fixed connection of puddler (16), case (19) intercommunication is placed through blanking pipe and concrete in agitator tank (14) bottom, both ends are provided with a set of support column (20) respectively about concrete placement tank (19) upper surface, support column (20) one end is placed case (19) with the concrete and is linked to each other, both ends fixed connection about the other end and backup pad (13) bottom.
2. The concrete mixer for construction site according to claim 1, wherein the first rotating shaft (7) and the second rotating shaft (10) are fixedly connected with a first bevel gear (21) at the bottom end of the part of the mixer drum (11), the first bevel gear (21) is arranged in a protective box (22), the left end of the first bevel gear (21) is engaged with a second bevel gear (23), the second bevel gear (23) is connected with a transmission rod (24), one end of the transmission rod (24) is connected with the second bevel gear (23), the other end of the transmission rod (24) passes through the protective box (22) and is fixedly connected with a second mixing column (25), the right end of the first bevel gear (21) is engaged with a third bevel gear (26), the third bevel gear (26) is connected with the transmission rod (24), and one end of the transmission rod (24) is connected with the third bevel gear (26), the other end of the stirring rod passes through the protective box (22) and is fixedly connected with a second stirring column (25).
3. The concrete mixing device for construction sites according to claim 1, a discharge pipe (27) is obliquely arranged at the right end of the outer surface of the concrete placing box (19), one end of the discharge pipe (27) is communicated with the concrete placing box (19), the other end is connected with the concrete containing device (28), the concrete containing device (28) comprises a placing groove (281), the discharge pipe (27) is communicated with the placing groove (281), a placing plate (282) is arranged in the placing groove (281), a plurality of extension springs (283) are arranged at the bottom end of the placing plate (282), one end of the extension spring (283) is connected with the bottom end of the placing plate (282), the other end is fixedly connected with the bottom end inside the placing groove (281), the left end and the right end of the upper surface of the placing plate (282) are respectively provided with a baffle plate (284), a discharge hole (285) is formed in the lower portion of the baffle (284) at the left end of the upper surface of the placing plate (282).
4. A concrete mixing device for construction sites according to claim 1, characterized in that a material leaking pipe (29) is arranged at the bottom end of the mixing tank (11), one end of the material leaking pipe (29) is communicated with the mixing tank (11), and the other end of the material leaking pipe passes through the mixing tank (14) to be communicated with the mixing chamber (15).
5. A concrete mixing apparatus for use in construction sites according to claim 1 wherein the mixing chamber (15) is semicircular in shape at the bottom and the mixing table (18) is of a semicircular configuration.
6. A concrete mixing device for construction sites according to claim 1, characterized in that a discharge hopper (30) is arranged on the top of the mixing tank (11).
7. A concrete mixing device for construction sites according to claim 1, wherein a set of supporting seats (31) are respectively provided at the left and right ends of the bottom of the concrete placing box (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921256810.8U CN210500833U (en) | 2019-08-05 | 2019-08-05 | Concrete mixing device for building site |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921256810.8U CN210500833U (en) | 2019-08-05 | 2019-08-05 | Concrete mixing device for building site |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210500833U true CN210500833U (en) | 2020-05-12 |
Family
ID=70587754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921256810.8U Expired - Fee Related CN210500833U (en) | 2019-08-05 | 2019-08-05 | Concrete mixing device for building site |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210500833U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112473511A (en) * | 2020-11-26 | 2021-03-12 | 盐城市宝旺城市开发建设有限公司 | Municipal construction safety civil engineering raw materials homogeneous mixing device |
-
2019
- 2019-08-05 CN CN201921256810.8U patent/CN210500833U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112473511A (en) * | 2020-11-26 | 2021-03-12 | 盐城市宝旺城市开发建设有限公司 | Municipal construction safety civil engineering raw materials homogeneous mixing device |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200512 |
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| CF01 | Termination of patent right due to non-payment of annual fee |