CN214982162U - Proportioning bin is used in production of high strength lightweight aggregate concrete - Google Patents
Proportioning bin is used in production of high strength lightweight aggregate concrete Download PDFInfo
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Abstract
The utility model relates to a proportioning bins is used in production of high-strength light aggregate concrete, relate to concrete dispensing equipment's technical field, it is including setting up to quadrangular pyramid's proportioning bins body, all be provided with the connecting rod along its incline direction on four inner walls of proportioning bins body, it is equipped with the telescopic cylinder to slide the cover on the connecting rod, the telescopic cylinder is rather than the inner wall parallel arrangement of the proportioning bins body that corresponds, the telescopic cylinder is along the flexible setting of perpendicular its direction of sliding, and the both ends of telescopic cylinder roll the butt rather than the both sides wall of the proportioning bins body inner wall that corresponds respectively, be provided with on the telescopic cylinder and be used for scraping the brush of sweeping the adnexed aggregate on the proportioning bins body inner wall, be provided with the driving piece that is used for driving the telescopic cylinder to slide on the proportioning bins body. This application can improve the utilization ratio of aggregate in the proportioning bins body, has the energy-conserving effect of building.
Description
Technical Field
The application relates to the technical field of concrete batching equipment, in particular to a batching bin for producing high-strength lightweight aggregate concrete.
Background
Concrete aggregates, also known as "aggregates", are granular loose materials that act as a framework or fill in the concrete. The concrete aggregate is divided into coarse aggregate and fine aggregate, the particle diameter of the fine aggregate is between 0.16 and 5mm, natural sand such as river sand, sea sand, valley sand and the like is generally adopted, and when the natural sand is lacked, artificial sand ground by hard rock can be used; the particle diameter of the coarse aggregate is more than 5mm, the common crushed stone and pebbles exist, under the same condition, the strength of the crushed stone concrete is higher than that of the pebble concrete, but the crushed stone is formed by crushing rocks, and the cost is higher than that of the pebbles. The common coarse aggregate in the light aggregate concrete comprises natural porous rock such as pumice and the like, artificial porous aggregate such as ceramsite, expanded slag and the like.
The prior Chinese patent with the patent application number of 201920065190.3 provides a concrete proportioning mixer, which comprises a frame, a weighing bin and a proportioning bin; the top end of the rack is provided with a weighing sensor, the weighing bin is arranged at the top end of the weighing sensor, the bottom of the weighing bin is provided with a discharger, and the discharger is connected with the weighing bin through a bearing; the proportioning bins are placed in the middle of the lower portion of the rack through the bin support, the proportioning bins are located below the weighing bins, and the second conveying belt is placed below the proportioning bins.
To the correlation technique among the above-mentioned, the inventor thinks that the aggregate falls into the proportioning bins from weighing the storehouse after, and some aggregate can adhere on the proportioning bins inner wall, leads to the aggregate from the proportioning bins can't all fall on the second conveyer belt, and then makes the aggregate utilization ratio in the proportioning bins low.
SUMMERY OF THE UTILITY MODEL
In order to improve the aggregate utilization rate low problem in the proportioning bins, this application provides a proportioning bin is used in production of high-strength lightweight aggregate concrete.
The application provides a pair of proportioning bins is used in production of high-strength lightweight aggregate concrete adopts following technical scheme:
the utility model provides a proportioning bins for high-strength lightweight aggregate concrete production, includes the proportioning bins body that sets up to the quadrangular pyramid form, all be provided with the connecting rod along its incline direction on four inner walls of proportioning bins body, it is equipped with the telescopic cylinder to slide the cover on the connecting rod, the telescopic cylinder corresponds rather than the inner wall parallel arrangement of proportioning bins body, the telescopic cylinder is along the flexible setting of perpendicular its direction of sliding, just the both ends of telescopic cylinder correspond rather than respectively the both sides wall roll butt of proportioning bins body inner wall, be provided with on the telescopic cylinder and be used for scraping sweep glue the brush of adnexed aggregate on the proportioning bins body inner wall, be provided with on the proportioning bins body and be used for the drive the driving piece that the telescopic cylinder slided.
Through adopting above-mentioned technical scheme, when being stained with the aggregate on proportioning bins body inner wall, start the driving piece, the flexible section of thick bamboo of driving piece drive slides on the connecting rod, and the brush on the flexible section of thick bamboo this moment can be scraped the aggregate of adhesion on proportioning bins body inner wall, and the adhesion that reduces aggregate on the proportioning bins body inner wall is piled up, improves the utilization ratio of aggregate in the proportioning bins body, has the effect of building energy conservation.
Optionally, the telescopic cylinder comprises a connecting cylinder and a coaxial telescopic device, the connecting cylinder is sleeved with the connecting rod in a sliding manner, the connecting cylinder is arranged at two ends of the connecting cylinder in a coaxial telescopic manner, the driving piece drives the connecting cylinder to slide on the connecting rod, a limiting part used for limiting deflection of the connecting cylinder is arranged on the connecting rod, and an elastic part used for elastically connecting the sliding cylinder to the connecting cylinder is arranged in the connecting cylinder.
Through adopting the above technical scheme, when driving piece drive connecting cylinder slided on the connecting rod, because the proportioning bins body sets up to the quadrangular pyramid form, so the connecting cylinder drives the slip section of thick bamboo when sliding downwards along the inner wall of proportioning bins body on the connecting rod, the slip section of thick bamboo slides towards the connecting rod direction under the butt effect of proportioning bins body lateral wall, make distance between the slip section of thick bamboo at connecting cylinder both ends the same with the distance between the wall of proportioning bins body both sides, and then make the telescopic cylinder can drive the brush and scrape the inner wall of the not co-altitude department of proportioning bins body and sweep, it piles up to reduce the adhesion of aggregate on the proportioning bins body inner wall, improve the utilization ratio of aggregate in the proportioning bins body, the effect of building energy conservation has.
Optionally, the limiting part is a guide rail, the guide rail is arranged on the circumferential wall of the connecting rod along the extending direction of the connecting rod, a slide way matched with the guide rail in a sliding manner is arranged on the connecting cylinder, and two ends of the slide way are both provided with openings.
Through adopting above-mentioned technical scheme, when driving piece drive connecting cylinder slided on the connecting rod, the interact of guide rail and slide has restricted the beat of connecting cylinder on the connecting rod for the section of thick bamboo that slides at connecting cylinder both ends all the time with the inner wall parallel arrangement of proportioning bins body, ensured the brush on the section of thick bamboo that slides and to the effect of scraping of proportioning bins body inner wall, the adhesion of aggregate is piled up on the reduction proportioning bins body inner wall, improves the utilization ratio of aggregate in the proportioning bins body, has the effect of building energy saving.
Optionally, the elastic element is a pressure spring, two ends of the pressure spring are fixedly connected with the inner wall of the connecting cylinder and the inner wall of the sliding cylinder respectively, and a guide element used for enabling the sliding cylinder to stably stretch and slide on the connecting cylinder is arranged on the connecting cylinder.
Through adopting above-mentioned technical scheme, the pressure spring will slide a section of thick bamboo elastic connection on the connecting cylinder, a section of thick bamboo that slides towards the direction of keeping away from the connecting cylinder under the spring action of pressure spring and rolls the butt on the lateral wall of proportioning bins body for brush on the section of thick bamboo that slides can all stabilize everywhere on the proportioning bins body inner wall and scrape and sweep, and the adhesion of aggregate is piled up on reducing proportioning bins body inner wall, improves the utilization ratio of aggregate in the proportioning bins body, has the energy-conserving effect of building.
Optionally, a sliding barrel is close to its correspondence run through on the terminal surface of proportioning bins body inner wall and seted up the sliding groove, the sliding groove is followed the direction setting that sliding barrel slided, the brush rigid coupling is in on the terminal surface of sliding groove both sides, be located on the connecting cylinder the brush can slide and peg graft in the sliding groove.
Through adopting above-mentioned technical scheme, when a section of thick bamboo that slides stretches out and draws back on the connecting cylinder and slide, the brush on the connecting cylinder slides and inserts the inslot that slides, and the setting up of sliding groove makes the brush on the connecting cylinder can not be by the inner wall extrusion deformation of a section of thick bamboo that slides, has ensured the brush on the connecting cylinder to the effect of scraping of proportioning bins body inner wall.
Optionally, the guide piece is a slide rail, the slide rail is arranged on the peripheral wall of the connecting cylinder along the sliding direction of the sliding cylinder, the sliding cylinder is covered on the periphery of the connecting cylinder, and a sliding groove matched with the slide rail in a sliding manner is formed in the inner wall of the sliding cylinder.
Through adopting above-mentioned technical scheme, a section of thick bamboo that slides can stably slide along the connecting cylinder under the interact of slide rail and spout, has ensured the brush on the section of thick bamboo that slides and has swept the effect to scraping of proportioning bins body inner wall, also makes the brush on the connecting cylinder can stably slide and peg graft in the sliding tray simultaneously.
Optionally, be provided with on the inner wall of proportioning bins body be used for with connecting rod releasable connection is in connecting seat on the proportioning bins body.
Through adopting above-mentioned technical scheme, connecting rod detachable connection is on the proportioning bins body with the connecting seat, is convenient for demolish the connecting rod from the proportioning bins body fast to change the brush, ensured the brush to the effect of sweeping of proportioning bins body inner wall.
Optionally, the sliding barrel is far away from one end of the connecting barrel is rotatably connected with a roller, and the roller is in rolling butt joint with the side wall of the proportioning bin body.
Through adopting above-mentioned technical scheme, the gyro wheel truns into rolling friction with the translation friction between a sliding section of thick bamboo and the proportioning bins body lateral wall, has reduced the friction between a sliding section of thick bamboo and the proportioning bins body lateral wall, and the driving piece quick drive sliding section of thick bamboo of being convenient for slides and sweeps proportioning bins body inner wall, has also prolonged the life of a sliding section of thick bamboo simultaneously, has the energy-conserving effect of building.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the driving piece drives the telescopic cylinder to slide on the connecting rod, and the brush on the telescopic cylinder can sweep aggregate adhered to the inner wall of the proportioning bin body, so that the adhesion and accumulation of the aggregate on the inner wall of the proportioning bin body are reduced, the utilization rate of the aggregate in the proportioning bin body is improved, and the energy-saving effect of a building is achieved;
2. when the connecting cylinder drives the sliding cylinder to slide downwards on the connecting rod along the inner wall of the proportioning bin body, the sliding cylinder slides and compresses towards the direction of the connecting rod under the abutting action of the side wall of the proportioning bin body, so that the telescopic cylinder can drive the brush to sweep the inner walls of the proportioning bin body at different heights, the adhesion and accumulation of aggregates on the inner wall of the proportioning bin body are reduced, the utilization rate of the aggregates in the proportioning bin body is improved, and the building energy-saving effect is achieved;
3. the setting up of the groove that slides makes the brush on the connecting cylinder can not be by the inner wall extrusion deformation of a section of thick bamboo that slides, has ensured the effect of sweeping of brush on the connecting cylinder to proportioning bins body inner wall.
Drawings
FIG. 1 is a schematic structural diagram of the whole in the embodiment of the present application;
FIG. 2 is a schematic structural diagram of the proportioning bin body, the connecting rod, the telescopic cylinder, the driving member, the connecting seat and the roller in the embodiment of the present application;
FIG. 3 is a schematic structural diagram of a connecting rod, a telescopic cylinder, a brush, a driving member, a guide rail, a sliding rail, a connecting seat and a roller in the embodiment of the present application;
fig. 4 is an exploded view of the telescopic cylinder, the brush, the pressure spring, the slide rail and the roller in the embodiment of the present application.
Reference numerals: 1. a proportioning bin body; 2. a connecting rod; 3. a telescopic cylinder; 31. a connecting cylinder; 32. a sliding barrel; 4. a brush; 5. a drive member; 6. a guide rail; 7. a slideway; 8. a pressure spring; 9. a sliding groove; 10. a slide rail; 11. a chute; 12. a connecting seat; 13. and a roller.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses proportioning bins is used in production of high-strength lightweight aggregate concrete. Referring to fig. 1 and 2, the proportioning bin for producing the high-strength lightweight aggregate concrete comprises a hollow quadrangular pyramid-shaped proportioning bin body 1, wherein the proportioning bin body 1 is erected on the ground through a support, and the central axis of the proportioning bin body 1 is vertical to the ground; both ends are the opening setting about the proportioning bins body 1, and the upper end opening size of proportioning bins body 1 is greater than the opening size of 1 lower extreme of proportioning bins body, and the feed bin that is used for the feed is erect to the upper end opening part of proportioning bins body 1, and 1 lower extreme opening part of proportioning bins body is provided with the transmission band that is used for accepting the aggregate.
Referring to fig. 2 and 3, all be provided with connecting rod 2 along its incline direction on four inner walls of proportioning bins body 1, be provided with on the inner wall of proportioning bins body 1 and be used for connecting seat 12 on proportioning bins body 1 with 2 releasable connections of connecting rod, every connecting rod 2 corresponds two connecting seats 12, and two connecting seats 12 are established respectively at the both ends of connecting rod 2, and connecting seat 12 passes through the screw and connects connecting rod 2 on the inner wall of proportioning bins body 1.
Referring to fig. 2 and 3, the slip cover is equipped with telescopic cylinder 3 on connecting rod 2, telescopic cylinder 3 and the inner wall parallel arrangement of proportioning bins body 1 that corresponds rather than, telescopic cylinder 3 is along the flexible setting of the direction of its slip perpendicularly, be provided with on the telescopic cylinder 3 and be used for scraping the brush 4 of sweeping the attached aggregate on the proportioning bins body 1 inner wall, brush 4 is located telescopic cylinder 3 and rather than between the inner wall of parallel arrangement's proportioning bins body 1, brush 4 sets up along 3 extending direction of telescopic cylinder, brush 4 can be for the screw connection with telescopic cylinder 3's connected mode, also can be for bonding, still can be for the joint.
Referring to fig. 2 and 3, a proportioning bin body 1 is provided with a driving piece 5 for driving a telescopic cylinder 3 to slide, the driving piece 5 is positioned on one side of a connecting rod 2 away from the inner wall of the proportioning bin body 1, the number of the driving pieces 5 is four, the four driving pieces 5 are respectively in one-to-one correspondence with the four telescopic cylinders 3, in the embodiment of the application, the driving piece 5 is arranged as an air cylinder, the air cylinder is fixedly connected to an opening at the upper end of the proportioning bin body 1 through a support, a piston rod of the air cylinder is arranged along the inclined direction of the inner wall of the proportioning bin body 1, and the piston rod of the air cylinder is fixedly connected with the middle part of the telescopic cylinder 3 through a screw;
in another possible embodiment, the driving member 5 is a screw rod, the screw rod is parallel to the connecting rod 2, both ends of the screw rod are rotatably connected to the inner wall of the proportioning bin body 1 through a rotating bearing, a motor for driving the screw rod to rotate is arranged at the opening at the upper end of the proportioning bin body 1, a threaded seat is in threaded connection with the screw rod, the threaded seat can slide along the axial direction of the screw rod, and the threaded seat is fixedly connected with the middle part of the telescopic cylinder 3 through a screw.
Referring to fig. 3 and 4, the telescopic cylinder 3 includes a connecting cylinder 31, a central axis of the connecting cylinder 31 is perpendicular to the connecting rod 2, the connecting cylinder 31 is slidably sleeved on the connecting rod 2, the driving member 5 is fixedly connected with a peripheral wall of the connecting cylinder 31, and the driving member 5 drives the connecting cylinder 31 to slide on the connecting rod 2; a limiting piece for limiting the deflection of the connecting cylinder 31 is arranged on the connecting rod 2, the limiting piece is arranged as a guide rail 6, the guide rail 6 is welded and fixed on the peripheral wall of the connecting rod 2 along the extending direction of the connecting rod 2, a slide way 7 matched with the guide rail 6 in a sliding way is arranged on the connecting cylinder 31, and two ends of the slide way 7 are both provided with openings; the interaction of guide rail 6 and slide 7 has restricted the beat of connecting cylinder 31 on connecting rod 2 for connecting cylinder 31 all the time with proportioning bins body 1's inner wall parallel arrangement.
Referring to fig. 3 and 4, the telescopic cylinder 3 further includes two sliding cylinders 32, the two sliding cylinders 32 are respectively coaxially and telescopically disposed at two ends of the connecting cylinder 31, the connecting cylinder 31 and the sliding cylinders 32 are both hollow, the sliding cylinders 32 are slidably disposed on the periphery of the connecting cylinder 31, and the inner diameter of the sliding cylinders 32 is equal to the outer diameter of the connecting cylinder 31.
Referring to fig. 3 and 4, an elastic member for elastically connecting the sliding cylinder 32 to the connecting cylinder 31 is arranged in the connecting cylinder 31, the elastic member is a pressure spring 8, and two ends of the pressure spring 8 are respectively welded and fixed with the inner wall of the connecting cylinder 31 and the inner wall of the sliding cylinder 32; connecting cylinder 31 when upwards sliding along proportioning bins body 1's inner wall on connecting rod 2 with the slip section of thick bamboo 32 that moves, a section of thick bamboo 32 slides towards keeping away from connecting cylinder 31 direction under the spring action of pressure spring 8, and make the one end that a section of thick bamboo 32 kept away from connecting cylinder 31 and proportioning bins body 1's lateral wall butt slide, make the distance between the section of thick bamboo 32 that slides at connecting cylinder 31 both ends the same with the distance between the 1 both sides wall of proportioning bins body, and then make connecting cylinder 31 and a section of thick bamboo 32 that slides can drive brush 4 and sweep the inner wall of proportioning bins body 1 not co-altitude department.
Referring to fig. 3 and 4, one end of the sliding cylinder 32, which is far away from the connecting cylinder 31, is rotatably connected with a roller 13 through a rotating shaft, and the roller 13 is in rolling contact with the side wall of the proportioning bin body 1; the translation friction between the roller 13 and the sliding cylinder 32 and the side wall of the proportioning bin body 1 is converted into rolling friction, so that the friction between the sliding cylinder 32 and the side wall of the proportioning bin body 1 is reduced, and the driving part 5 can drive the sliding cylinder 32 to slide and sweep the inner wall of the proportioning bin body 1 conveniently and quickly.
Referring to fig. 3 and 4, be provided with on the connecting cylinder 31 and be used for making a slip section of thick bamboo 32 stabilize the guide that flexible slided on the connecting cylinder 31, the guide sets up to slide rail 10, slide rail 10 along a slip section of thick bamboo 32 direction welded fastening that slides on the perisporium of connecting cylinder 31, a slip section of thick bamboo 32 cover is established in the connecting cylinder 31 periphery, set up the spout 11 with the slide rail 10 adaptation that slides on a slip section of thick bamboo 32 inner wall, the one end that spout 11 is close to connecting rod 2 sets up for the opening, the one end that connecting rod 2 was kept away from to spout 11 is the closed setting.
Referring to fig. 3 and 4, sliding barrel 32 has run through on the terminal surface that is close to its proportioning bins body 1 inner wall that corresponds and has seted up sliding groove 9, and sliding groove 9 sets up along the direction that sliding barrel 32 slided, and the brush 4 rigid coupling that is located sliding barrel 32 is on the terminal surface of sliding groove 9 both sides, and the brush 4 that is located on connecting barrel 31 can slide and peg graft in sliding groove 9, and sliding groove 9's setting makes brush 4 on connecting barrel 31 can not be by sliding barrel 32's inner wall extrusion deformation.
The embodiment of the application provides a high strength lightweight aggregate concrete production is with proportioning bins's implementation principle does: when being stained with the aggregate on 1 inner wall of proportioning bins body, start driving piece 5, 5 drive connecting cylinders 31 of driving piece slide on connecting rod 2, because proportioning bins body 1 sets up to the quadrangular pyramid form, so connecting cylinder 31 takes the drive to slide when section of thick bamboo 32 slides down along the inner wall of proportioning bins body 1 on connecting rod 2, slide section of thick bamboo 32 and slide towards 2 directions of connecting rod under the butt effect of 1 lateral wall of proportioning bins body, make distance between the section of thick bamboo 32 that slides at connecting cylinder 31 both ends the same with the distance between 1 both sides wall of proportioning bins body, and then make connecting cylinder 31 and slide section of thick bamboo 32 and can drive brush 4 and scrape the inner wall of 1 not co-altitude department of proportioning bins body, reduce the adhesion of aggregate on the proportioning bins body inner wall and pile up, improve the utilization ratio of aggregate in the proportioning bins body, building energy-saving effect has.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a proportioning bins is used in production of high-strength lightweight aggregate concrete, includes proportioning bin body (1) that sets up to quadrangular pyramid form, its characterized in that: all be provided with connecting rod (2) along its incline direction on four inner walls of proportioning bins body (1), it is equipped with telescopic cylinder (3) to slide on connecting rod (2), telescopic cylinder (3) correspond rather than inner wall parallel arrangement of proportioning bins body (1), telescopic cylinder (3) are along the flexible setting of perpendicular its direction of sliding, just the both ends of telescopic cylinder (3) correspond rather than respectively the both sides wall roll butt of proportioning bins body (1) inner wall, be provided with on telescopic cylinder (3) and be used for scraping and sweep brush (4) of the adnexed aggregate of gluing on proportioning bins body (1) inner wall, be provided with on proportioning bins body (1) and be used for the drive driving piece (5) that telescopic cylinder (3) slided.
2. The proportioning bin for high-strength lightweight aggregate concrete production according to claim 1, wherein: telescopic cylinder (3) include with connecting rod (2) slide connecting cylinder (31) and coaxial flexible setting of establishing and be in the sliding cylinder (32) at connecting cylinder (31) both ends, driving piece (5) drive connecting cylinder (31) are in slide on connecting rod (2), be provided with on connecting rod (2) and be used for the restriction the locating part of connecting cylinder (31) beat, be provided with in connecting cylinder (31) be used for with sliding cylinder (32) elastic connection is in the elastic component on connecting cylinder (31).
3. The proportioning bin for high-strength lightweight aggregate concrete production according to claim 2, wherein: the locating part sets up to guide rail (6), guide rail (6) are followed connecting rod (2) extending direction sets up on the connecting rod (2) perisporium, set up on connecting cylinder (31) with slide (7) of guide rail (6) adaptation that slides, the both ends of slide (7) are the opening setting.
4. The proportioning bin for high-strength lightweight aggregate concrete production according to claim 2, wherein: the elastic part sets up to pressure spring (8), the both ends of pressure spring (8) respectively with the inner wall of connecting cylinder (31) with the inner wall rigid coupling of a section of thick bamboo that slides (32), be provided with on connecting cylinder (31) and be used for making a section of thick bamboo that slides (32) are in stable flexible guide that slides on connecting cylinder (31).
5. The proportioning bin for high-strength lightweight aggregate concrete production according to claim 2, wherein: it corresponds to slip section of thick bamboo (32) run through on the terminal surface of proportioning bins body (1) inner wall and seted up sliding groove (9), sliding groove (9) are followed sliding cylinder (32) direction setting of sliding, brush (4) rigid coupling is in on the terminal surface of sliding groove (9) both sides, be located on connecting cylinder (31) brush (4) can slide and peg graft in sliding groove (9).
6. The proportioning bin for high-strength lightweight aggregate concrete production according to claim 4, wherein: the guide piece sets up to slide rail (10), slide rail (10) are followed slip section of thick bamboo (32) slip direction sets up on the perisporium of connecting cylinder (31), slip section of thick bamboo (32) cover is established connecting cylinder (31) periphery, set up on slip section of thick bamboo (32) inner wall with slide rail (10) sliding adaptation's spout (11).
7. The proportioning bin for high-strength lightweight aggregate concrete production according to claim 1, wherein: be provided with on the inner wall of proportioning bins body (1) be used for with connecting rod (2) detachable connection be in connecting seat (12) on the proportioning bins body (1).
8. The proportioning bin for high-strength lightweight aggregate concrete production according to claim 2, wherein: the one end that sliding barrel (32) kept away from connecting cylinder (31) rotates and is connected with gyro wheel (13), gyro wheel (13) with the lateral wall roll butt of proportioning bins body (1).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115026954A (en) * | 2022-07-07 | 2022-09-09 | 嘉兴鸿业工程科技有限公司 | Premixed concrete production device and using method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115026954A (en) * | 2022-07-07 | 2022-09-09 | 嘉兴鸿业工程科技有限公司 | Premixed concrete production device and using method thereof |
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