CN111805749A - Precooling device for producing fine aggregate in concrete production - Google Patents
Precooling device for producing fine aggregate in concrete production Download PDFInfo
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- CN111805749A CN111805749A CN202010703385.3A CN202010703385A CN111805749A CN 111805749 A CN111805749 A CN 111805749A CN 202010703385 A CN202010703385 A CN 202010703385A CN 111805749 A CN111805749 A CN 111805749A
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- precooling
- fine aggregate
- groove
- box
- rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/0007—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
- B28C7/0023—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust by heating or cooling
- B28C7/0038—Cooling, e.g. using ice
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- Dispersion Chemistry (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention belongs to the field of precooling equipment, and particularly relates to a precooling device for producing fine aggregate from concrete, which comprises a precooling box and refrigerating equipment positioned on one side of the precooling box, wherein a storage box is fixedly arranged on the top of the precooling box, a through hole is formed in the top of the precooling box and is communicated with the storage box, a water tank is fixedly arranged on the top of the precooling box, a circulating water pump is fixedly arranged on one side of the water tank, a coiled pipe is arranged in the storage box, one end of the coiled pipe is fixedly arranged on the water tank, the other end of the coiled pipe is fixedly arranged on the circulating water pump, a placing plate is fixedly arranged in the precooling box, a first hole is formed in the placing plate, and two first grooves which are symmetrically arranged are formed in the inner walls of. The invention has reasonable design, simple structure and convenient operation, can carry out primary cooling on the fine aggregate through the coiled pipe, can charge cold air into the precooling box through refrigeration equipment, and can carry out precooling on the fine aggregate through the cold air.
Description
Technical Field
The invention relates to the technical field of precooling equipment, in particular to a precooling device for producing fine aggregate in concrete.
Background
The concrete pre-cooling is to cool the raw material before the concrete is mixed. The concrete raw materials generally include coarse aggregate, fine aggregate, cementitious materials (cement, coal ash, etc.), water, additives, and the like. At present, aggregate air cooling, flake ice adding and cold water mixing are common precooling technologies for precooled concrete production, and are widely applied to the construction of large-volume concrete projects such as large hydropower station projects and the like. The aggregate air cooling is only for coarse aggregates, and fine aggregates cannot be air cooled due to too small gaps. The air cooling of aggregate can be divided into ground air cooling and mixing plant air cooling. Ground forced air cooling needs to set up once air-cooled feed bin, and once air-cooled feed bin is bulky, structural design requires highly, the construction period is long, and reinforcing bar and built-in fitting preparation volume are big, have not being convenient for to the abundant preliminary precooling of fine aggregate and the problem of precooling once more, therefore we have provided a concrete production fine aggregate precooling apparatus and have been used for solving above-mentioned problem.
Disclosure of Invention
The invention aims to solve the defect that preliminary pre-cooling and secondary pre-cooling are inconvenient to fully carry out on fine aggregate in the prior art, and provides a fine aggregate pre-cooling device for concrete production.
In order to achieve the purpose, the invention adopts the following technical scheme:
a concrete production fine aggregate precooling apparatus comprises a precooling box and a refrigerating device positioned on one side of the precooling box, wherein a storage box is fixedly mounted at the top of the precooling box, a through hole is formed in the top of the precooling box and communicated with the storage box, a water tank is fixedly mounted at the top of the precooling box, a circulating water pump is fixedly mounted on one side of the water tank, a coiled pipe is mounted in the storage box, one end of the coiled pipe is fixedly mounted on the water tank, the other end of the coiled pipe is fixedly mounted on the circulating water pump, a placing plate is fixedly mounted in the precooling box, a first hole is formed in the placing plate, two first grooves which are symmetrically arranged are respectively formed in the inner walls of the two sides of the first hole, the same sliding rod is slidably mounted in the two corresponding first grooves, a baffle is rotatably sleeved on the sliding rod and is matched with the first holes, one end of a reset spring is fixedly mounted on the inner wall, the other end of the reset spring is fixedly installed on the sliding rod, one side of one baffle plate of two adjacent baffle plates is provided with a connecting groove with an opening at the bottom, the inner walls of the two sides of the connecting groove are rotatably provided with the same rotating rod, the rotating rod is fixedly sleeved with a rotating seat, the rotating seat is fixedly installed on the other baffle plate, the inner walls of the two sides of the precooling box are fixedly provided with the same cross rod, the bottom of the cross rod is fixedly provided with a push rod motor, the top end of the push rod motor is fixedly provided with a support plate, and the support plate is;
a motor is fixedly installed on one side of the pre-cooling box, an output shaft of the motor extends into the pre-cooling box and is fixedly installed with one end of a lead screw, the other end of the lead screw is rotatably installed on the inner wall of the pre-cooling box, the same push plate is slidably installed on the inner walls of two sides of the pre-cooling box, a second groove is formed in the bottom of the push plate, a push claw is slidably installed in the second groove, the bottom end of the push claw is matched with the baffle, one side of the push claw is fixedly installed with one end of a fixed spring, the other end of the fixed spring is fixedly installed on the inner wall of the second groove, a third groove is formed in one side of the push plate and is communicated with the second groove, a connecting rod is fixedly installed at the other end of the push claw and extends into the third groove, the same rotating shaft is rotatably installed on the inner wall of the top and the inner wall of the bottom of the, and the rack is meshed with the corresponding gear, the rotating shaft is fixedly sleeved with a cam, and the cam is matched with the corresponding connecting rod.
Preferably, all seted up the spacing groove on the both sides inner wall of precooling case, the equal fixed mounting in both sides of push pedal has spacing seat, and spacing seat slidable mounting is at the spacing inslot that corresponds, can make the push pedal carry out stable removal.
Preferably, a valve body is installed in the through hole, and the valve body is set to be an electromagnetic valve.
Preferably, a cooling pipe is fixedly installed on the inner wall of the top of the pre-cooling box, and the cooling pipe extends into the water tank.
Preferably, a mounting plate is fixedly mounted on one side of the precooling box, a plurality of screw grooves are formed in the mounting plate, a plurality of screws are used on the motor, and the screws are matched with the corresponding screw grooves.
Preferably, all seted up on the both sides inner wall of precooling case and rotated the groove, and the lead screw rotates with the rotation groove that corresponds and is connected, can make the lead screw carry out stable rotation.
Preferably, the top of the water tank is provided with a water filling port, and a sealing plug is arranged in the water filling port.
Preferably, all seted up the sliding tray on the both sides inner wall of second groove, the equal fixed mounting in both sides that promotes the claw has the sliding seat, and sliding seat and the sliding tray sliding connection who corresponds.
According to the concrete production fine aggregate precooling device, fine aggregates are added into a storage box at first, cold air can be generated through refrigeration equipment and enters the precooling box to be cooled, the cold air and the precooling box can be cooled, water in a water tank can be pumped through a circulating water pump, the water can pass through a coiled pipe, and the fine aggregates in the storage box can be primarily cooled through the coiled pipe;
by starting the electromagnetic valve, the fine aggregate in the storage box enters the pre-cooling box, the fine aggregate drops on the baffle plate, then the electromagnetic valve is closed to close the through hole, the fine aggregate can be continuously cooled through the coiled pipe, then the motor can drive the lead screw to rotate, the rotation of the lead screw can drive the push plate to move, the push plate can drive the limiting seat to slide in the corresponding limiting groove, the movement of the push plate can push the fine aggregate, so that the fine aggregate can be scraped, and the fine aggregate can be uniformly received with cold air;
the movement of the push plate can drive the gear to rotate, the gear which can be hungry can rotate under the action of the rack, the gear can drive the rotating shaft to rotate, the rotating shaft can drive the cam to rotate, the cam can drive the pushing claw to move through the connecting rod and compress the fixed spring, the pushing claw can scrape the fine aggregate, when the cam rotates for a circle, the pushing claw can reset under the action of the fixed spring, when the cam rotates continuously, the pushing claw can move back and forth to turn the fine aggregate, at the moment, the cold air can fully contact the fine aggregate, so that the fine aggregate can be fully cooled, after the cooling is finished, the push rod motor is started, the push rod motor can drive the support plate to move upwards through the output shaft, so that the support plate can move upwards and rotate by taking the rotating rod as a center, thereby the first hole can be opened and the discharging can be carried out.
The invention has reasonable design, simple structure and convenient operation, can carry out primary cooling on the fine aggregate through the coiled pipe, can charge cold air into the precooling box through refrigeration equipment, and can carry out precooling on the fine aggregate through the cold air.
Drawings
FIG. 1 is a schematic structural diagram of a front view of a pre-cooling device for producing fine aggregate in concrete according to the present invention;
FIG. 2 is a schematic top view of a placement plate of a concrete production fine aggregate precooling apparatus according to the present invention;
FIG. 3 is a schematic structural diagram of part A of a pre-cooling device for producing fine aggregate in concrete according to the present invention;
FIG. 4 is a schematic diagram of a partial side view of a pre-cooling device for producing fine aggregate in concrete according to the present invention;
fig. 5 is a schematic structural diagram of part B of a concrete production fine aggregate precooling apparatus according to the present invention.
In the figure: 1. a pre-cooling box; 2. a refrigeration device; 3. a material storage box; 4. a through hole; 5. a serpentine tube; 6. a water tank; 7. a water circulating pump; 8. a cooling tube; 9. placing the plate; 10. a first hole; 11. a first groove; 12. a slide bar; 13. a baffle plate; 14. a return spring; 15. connecting grooves; 16. rotating the rod; 17. a rotating seat; 18. a cross bar; 19. a push rod motor; 20. a support plate; 21. a motor; 22. a screw rod; 23. pushing the plate; 24. a second groove; 25. pushing the claw; 26. fixing the spring; 27. a third groove; 28. a connecting rod; 29. a rotating shaft; 30. a rack; 31. a gear; 32. a cam; 33. a limiting groove; 34. a limiting seat.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-5, a concrete production fine aggregate precooling apparatus comprises a precooling tank 1 and a refrigeration plant 2 located on one side of the precooling tank 1, a storage tank 3 is fixedly installed on the top of the precooling tank 1, a through hole 4 is formed on the top of the precooling tank 1, the through hole 4 is communicated with the storage tank 3, a water tank 6 is fixedly installed on the top of the precooling tank 1, a circulating water pump 7 is fixedly installed on one side of the water tank 6, a coiled pipe 5 is installed in the storage tank 3, one end of the coiled pipe 5 is fixedly installed on the water tank 6, the other end of the coiled pipe 5 is fixedly installed on the circulating water pump 7, a placing plate 9 is fixedly installed in the precooling tank 1, a first hole 10 is formed on the placing plate 9, two first grooves 11 symmetrically formed on the inner walls on both sides of the first hole 10, the same sliding rod 12 is slidably installed in the two corresponding first grooves 11, a baffle 13 is rotatably sleeved on, two baffle plates 13 are matched with the first hole 10, one end of a return spring 14 is fixedly arranged on the inner wall of one side of the first groove 11, the other end of the return spring 14 is fixedly arranged on a sliding rod 12, one side of one baffle plate 13 of two adjacent baffle plates 13 is provided with a connecting groove 15 with an opening bottom, the inner walls of two sides of the connecting groove 15 are rotatably provided with the same rotating rod 16, the rotating rod 16 is fixedly sleeved with a rotating seat 17, the rotating seat 17 is fixedly arranged on the other baffle plate 13, the inner walls of two sides of the pre-cooling box 1 are fixedly provided with the same cross rod 18, the bottom of the cross rod 18 is fixedly provided with a push rod motor 19, the top end of the push rod motor 19 is fixedly provided with a support plate 20, and the support plate;
a motor 21 is fixedly arranged on one side of the pre-cooling box 1, an output shaft of the motor 21 extends into the pre-cooling box 1 and is fixedly provided with one end of a screw rod 22, the other end of the screw rod 22 is rotatably arranged on the inner wall of the pre-cooling box 1, the inner walls on two sides of the pre-cooling box 1 are slidably provided with the same push plate 23, the bottom of the push plate 23 is provided with a second groove 24, a push claw 25 is slidably arranged in the second groove 24, the bottom end of the push claw 25 is matched with the baffle 13, one side of the push claw 25 is fixedly provided with one end of a fixed spring 26, the other end of the fixed spring 26 is fixedly arranged on the inner wall of the second groove 24, one side of the push plate 23 is provided with a third groove 27, the third groove 27 is communicated with the second groove 24, the other end of the push claw 25 is fixedly provided with a connecting rod 28, the connecting rod 28 extends into the third groove 27, a gear 31 is fixedly sleeved on the rotating shaft 29, a rack 30 is fixedly installed on the inner wall of one side of the pre-cooling tank 1, the rack 30 is meshed with the corresponding gear 31, a cam 32 is fixedly sleeved on the rotating shaft 29, and the cam 32 is matched with the corresponding connecting rod 28.
In this embodiment, all seted up spacing groove 33 on the both sides inner wall of precooling case 1, the equal fixed mounting in both sides of push pedal 23 has spacing seat 34, and spacing seat 34 slidable mounting is in the spacing groove 33 that corresponds, can make push pedal 23 carry out stable removal.
In this embodiment, install the valve body in the through-hole 4, and the valve body sets up to the solenoid valve.
In this embodiment, the cooling pipe 8 is fixedly installed on the inner wall of the top of the pre-cooling tank 1, and the cooling pipe 8 extends into the water tank 6.
In this embodiment, a mounting plate is fixedly mounted on one side of the pre-cooling box 1, a plurality of screw grooves are formed in the mounting plate, a plurality of screws are used on the motor 21, and the screws are matched with the corresponding screw grooves.
In this embodiment, all seted up on the both sides inner wall of precooling case 1 and rotated the groove, and lead screw 22 rotates with the rotation groove that corresponds and is connected, can make lead screw 22 carry out stable rotation.
In this embodiment, the top of the water tank 6 is provided with a water filling opening, and a sealing plug is installed in the water filling opening.
In this embodiment, sliding grooves are formed in the inner walls of the two sides of the second groove 24, sliding seats are fixedly mounted on the two sides of the pushing claw 25, and the sliding seats are slidably connected with the corresponding sliding grooves.
According to the invention, firstly, fine aggregate is added into a storage box 3, cold air can be generated by a refrigeration device 2 and enters a pre-cooling box 1 to be cooled with the pre-cooling box 1, water in a water tank 6 can be pumped by a circulating water pump 7 through a circulating water pump 7 and passes through a coiled pipe 5, and the fine aggregate in the storage box 3 can be primarily cooled through the coiled pipe 5;
by starting the electromagnetic valve, the fine aggregate in the storage box 3 enters the pre-cooling box 1, the fine aggregate falls on the baffle 13, then the electromagnetic valve is closed to close the through hole 4, the fine aggregate can be continuously cooled through the coiled pipe 5, then the motor 21 can drive the screw rod 22 to rotate, the rotation of the screw rod 22 can drive the push plate 23 to move, the push plate 23 can drive the limiting seat 34 to slide in the corresponding limiting groove 33, the movement of the push plate 23 can push the fine aggregate, so that the fine aggregate can be scraped, and the fine aggregate can be uniformly received cold air;
the movement of the push plate 23 can drive the gear 31 to rotate, under the action of the rack 30, the gear 31 which can be hungry rotates, the gear 31 can drive the rotating shaft 29 to rotate, the rotating shaft 29 can drive the cam 32 to rotate, the cam 32 can drive the pushing claw 25 to move through the connecting rod 28 and compress the fixing spring 26, the pushing claw 25 can scrape the fine aggregate, when the cam 32 rotates for a circle, the pushing claw 25 can reset under the action of the fixing spring 26, when the cam 32 rotates continuously, the pushing claw 25 can move back and forth and turn the fine aggregate, at the moment, cold air can fully contact the fine aggregate, the fine aggregate can be fully cooled, after cooling, the push rod motor 19 is started, the push rod motor 19 can drive the support plate 20 to move upwards through the output shaft, so that the support plate 20 can be moved upward and rotated centering on the rotating rod 16, thereby opening the first hole 10 and enabling discharge.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A concrete production fine aggregate precooling apparatus comprises a precooling tank (1) and a refrigerating device (2) positioned on one side of the precooling tank (1), and is characterized in that a storage tank (3) is fixedly mounted on the top of the precooling tank (1), a through hole (4) is formed in the top of the precooling tank (1), the through hole (4) is communicated with the storage tank (3), a water tank (6) is fixedly mounted on the top of the precooling tank (1), a circulating water pump (7) is fixedly mounted on one side of the water tank (6), a coiled pipe (5) is mounted in the storage tank (3), one end of the coiled pipe (5) is fixedly mounted on the water tank (6), the other end of the coiled pipe (5) is fixedly mounted on the circulating water pump (7), a placing plate (9) is fixedly mounted in the precooling tank (1), a first hole (10) is formed in the placing plate (9), two first grooves (11) which are symmetrically arranged are formed in the inner walls of the two sides of the first hole (10), the two corresponding first grooves (11) are internally and slidably provided with the same sliding rod (12), the sliding rod (12) is rotatably sleeved with a baffle (13), the two baffles (13) are matched with the first hole (10), one end of a return spring (14) is fixedly arranged on the inner wall of one side of each first groove (11), the other end of the return spring (14) is fixedly arranged on the sliding rod (12), one side of one baffle (13) in two adjacent baffles (13) is provided with a connecting groove (15) with an open bottom, the inner walls of two sides of the connecting groove (15) are rotatably provided with the same rotating rod (16), the rotating rod (16) is fixedly sleeved with a rotating seat (17), the rotating seat (17) is fixedly arranged on the other baffle (13), the inner walls of two sides of the precooling box (1) are fixedly provided with the same transverse rod (18), the bottom of the transverse rod (18) is fixedly provided with a push rod motor (19), a supporting plate (20) is fixedly arranged at the top end of the push rod motor (19), and the supporting plate (20) is matched with the baffle (13);
a motor (21) is fixedly installed on one side of the pre-cooling box (1), an output shaft of the motor (21) extends into the pre-cooling box (1) and is fixedly installed with one end of a screw rod (22), the other end of the screw rod (22) is rotatably installed on the inner wall of the pre-cooling box (1), the inner walls on the two sides of the pre-cooling box (1) are slidably installed with a same push plate (23), a second groove (24) is formed in the bottom of the push plate (23), a push claw (25) is slidably installed in the second groove (24), the bottom end of the push claw (25) is matched with the baffle (13), one end of a fixed spring (26) is fixedly installed on one side of the push claw (25), the other end of the fixed spring (26) is fixedly installed on the inner wall of the second groove (24), a third groove (27) is formed in one side of the push plate (23), the third groove (27) is communicated with the second groove (24), and a connecting rod (28) is, and connecting rod (28) extend to in third groove (27), rotate on the top inner wall of third groove (27) and on the bottom inner wall and install same pivot (29), fixed cover is equipped with gear (31) on pivot (29), fixed mounting has rack (30) on one side inner wall of precooling case (1), and rack (30) meshes with corresponding gear (31) mutually, fixed cover is equipped with cam (32) on pivot (29), and cam (32) and corresponding connecting rod (28) looks adaptation.
2. The fine aggregate precooling apparatus for concrete production according to claim 1, wherein the inner walls of both sides of the precooling box (1) are provided with limiting grooves (33), both sides of the push plate (23) are fixedly provided with limiting seats (34), and the limiting seats (34) are slidably mounted in the corresponding limiting grooves (33).
3. The pre-cooling device for producing fine aggregate in concrete according to claim 1, wherein a valve body is installed in the through hole (4), and the valve body is set as an electromagnetic valve.
4. The pre-cooling device for producing the fine aggregate in the concrete according to claim 1, wherein a cooling pipe (8) is fixedly arranged on the inner wall of the top of the pre-cooling box (1), and the cooling pipe (8) extends into the water tank (6).
5. The pre-cooling device for producing the fine aggregate in the concrete according to claim 1, wherein a mounting plate is fixedly mounted on one side of the pre-cooling box (1), a plurality of screw grooves are formed in the mounting plate, a plurality of screws are used on the motor (21), and the screws are matched with the corresponding screw grooves.
6. The pre-cooling device for producing the fine aggregate in the concrete according to claim 1, wherein the inner walls of two sides of the pre-cooling box (1) are provided with rotating grooves, and the screw rod (22) is rotatably connected with the corresponding rotating grooves.
7. The pre-cooling device for the fine aggregate produced by the concrete according to claim 1, wherein a water filling opening is formed in the top of the water tank (6), and a sealing plug is installed in the water filling opening.
8. The pre-cooling device for producing fine aggregate in concrete according to claim 1, wherein sliding grooves are formed on the inner walls of the two sides of the second groove (24), sliding seats are fixedly installed on the two sides of the pushing claw (25), and the sliding seats are connected with the corresponding sliding grooves in a sliding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010703385.3A CN111805749A (en) | 2020-07-21 | 2020-07-21 | Precooling device for producing fine aggregate in concrete production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010703385.3A CN111805749A (en) | 2020-07-21 | 2020-07-21 | Precooling device for producing fine aggregate in concrete production |
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| Publication Number | Publication Date |
|---|---|
| CN111805749A true CN111805749A (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010703385.3A Pending CN111805749A (en) | 2020-07-21 | 2020-07-21 | Precooling device for producing fine aggregate in concrete production |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3099138A (en) * | 1961-04-28 | 1963-07-30 | John R Hightower | Continuous cooling method and apparatus |
| US3277664A (en) * | 1965-03-02 | 1966-10-11 | Koehring Co | Apparatus for cooling aggregate for concrete mix |
| JPH10329129A (en) * | 1997-05-30 | 1998-12-15 | Kumagai Gumi Co Ltd | Method and apparatus for producing concrete |
| CN201172257Y (en) * | 2008-03-11 | 2008-12-31 | 郑州水工机械厂 | Two-stage wind cooling device of aggregate bin of mixing station |
| CN205238299U (en) * | 2015-12-17 | 2016-05-18 | 中国水利水电第八工程局有限公司 | Concrete production fine aggregate precooling apparatus |
| CN205997155U (en) * | 2016-08-25 | 2017-03-08 | 中国水利电力对外公司 | Two stepwise aggregate air cooler of high feed bin |
| CN106863611A (en) * | 2017-03-28 | 2017-06-20 | 中国葛洲坝集团第工程有限公司 | A kind of pre cooling of concrete water-cooled aggregate technique |
| CN107616248A (en) * | 2017-10-13 | 2018-01-23 | 浙江两山信息科技有限公司 | One kind is used for tealeaves multi-stage drying device |
| CN210308396U (en) * | 2019-04-03 | 2020-04-14 | 铜仁学院 | Precooling device for producing fine aggregate in concrete production |
-
2020
- 2020-07-21 CN CN202010703385.3A patent/CN111805749A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3099138A (en) * | 1961-04-28 | 1963-07-30 | John R Hightower | Continuous cooling method and apparatus |
| US3277664A (en) * | 1965-03-02 | 1966-10-11 | Koehring Co | Apparatus for cooling aggregate for concrete mix |
| JPH10329129A (en) * | 1997-05-30 | 1998-12-15 | Kumagai Gumi Co Ltd | Method and apparatus for producing concrete |
| CN201172257Y (en) * | 2008-03-11 | 2008-12-31 | 郑州水工机械厂 | Two-stage wind cooling device of aggregate bin of mixing station |
| CN205238299U (en) * | 2015-12-17 | 2016-05-18 | 中国水利水电第八工程局有限公司 | Concrete production fine aggregate precooling apparatus |
| CN205997155U (en) * | 2016-08-25 | 2017-03-08 | 中国水利电力对外公司 | Two stepwise aggregate air cooler of high feed bin |
| CN106863611A (en) * | 2017-03-28 | 2017-06-20 | 中国葛洲坝集团第工程有限公司 | A kind of pre cooling of concrete water-cooled aggregate technique |
| CN107616248A (en) * | 2017-10-13 | 2018-01-23 | 浙江两山信息科技有限公司 | One kind is used for tealeaves multi-stage drying device |
| CN210308396U (en) * | 2019-04-03 | 2020-04-14 | 铜仁学院 | Precooling device for producing fine aggregate in concrete production |
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Application publication date: 20201023 |