CN114474405B

CN114474405B - Concrete mixing plant

Info

Publication number: CN114474405B
Application number: CN202210082648.2A
Authority: CN
Inventors: 解宝军; 吴光锐
Original assignee: Wencheng Lvju Hongneng Concrete Co ltd
Current assignee: Wencheng Lvju Hongneng Concrete Co ltd
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-10-21
Anticipated expiration: 2042-01-24
Also published as: CN114474405A

Abstract

The application discloses concrete mixing plant, it includes the frame and sets up the stirring host computer in the frame, be provided with the discharge gate on the stirring host computer, be provided with under the discharge gate and hold together the hopper, be provided with on the stirring host computer and be used for opening and close discharge gate shedding mechanism, it is provided with on the hopper and scrapes material mechanism to hold together, it includes and scrapes the material pole and drive that scrapes the material pole and around holding together hopper axis pivoted drive assembly with holding together hopper inner wall conflict. This application has the extravagant effect of reduction concrete.

Description

Concrete mixing plant

Technical Field

The application relates to the field of concrete production equipment, in particular to a concrete mixing plant.

Background

The concrete mixing plant is mainly used for mixing and mixing concrete and plays an important role in the building and building material industry of China.

The concrete mixing plant includes stirring host computer and sets up the hopper that holds together in stirring host computer discharge gate below, and the concrete mixes the back that finishes in stirring host computer, opens the discharge gate on the stirring host computer, and the concrete falls to the concrete mixer truck in holding together the hopper again through the discharge gate is carried to by the concrete mixer truck with concrete transportation to the building site on.

In the process of implementing the application, the inventor finds that at least the following problems exist in the technology: after the concrete mixer truck is filled with concrete, the discharge port is closed, and part of the concrete still remains in the material collecting hopper. The concrete remained on the collecting hopper drops on the ground, which causes the waste of the concrete and needs to be improved.

Disclosure of Invention

In order to reduce the concrete waste, the application provides a concrete mixing plant.

The application provides a concrete mixing plant adopts following technical scheme:

the utility model provides a concrete mixing plant, includes the frame and sets up the main mixing machine in the frame, be provided with the discharge gate on the main mixing machine, be provided with under the discharge gate and hold together the hopper, be provided with on the main mixing machine and be used for opening and close discharge gate shedding mechanism, it scrapes material mechanism to hold together to be provided with on the hopper, it includes scrapes the material pole and drive that scrapes the material pole and wind around holding together hopper axis pivoted drive assembly with holding together that the hopper inner wall is contradicted to scrape the material mechanism.

Through adopting above-mentioned technical scheme, after concrete mixing finishes, open the discharge gate through shedding mechanism, during concrete in the stirring host computer flowed into holding together the hopper through the discharge gate, flowed into the concrete mixer truck from holding together the hopper again. After the concrete mixer truck finishes loading, close the discharge gate through shedding mechanism earlier, the rethread drive assembly drive scrapes the material pole and rotates around the axis of holding together the hopper, and the material pole of scraping with holding together that the hopper inner wall was contradicted will hold together the concrete on the hopper inner wall and scrape and fall to the concrete delivery wagon in.

Compare in the direct driving away of concrete mixer truck, hold together the concrete drippage on the hopper in ground, this application mixing plant has reduced the waste of concrete. Compare in concrete mixer truck wait for to hold together the concrete in the hopper and drip to the concrete mixer truck completely, this application stirring station has improved production efficiency.

Optionally, the driving assembly comprises a driving gear ring which is rotatably arranged on the material collecting hopper and a driving gear which is meshed with the driving gear ring, the axis of the driving gear ring is collinear with the axis of the material collecting hopper, and the material scraping rod is connected to the driving gear ring.

Through adopting above-mentioned technical scheme, when scraping off the concrete on holding together the hopper inner wall, rotate drive gear and rotate in order to drive the rotation of drive ring gear, the material pole of scraping that connects on the drive ring gear rotates along with drive ring gear. Because the axis of the driving gear ring is collinear with the axis of the holding hopper, the scraping rod rotates around the axis of the holding hopper and scrapes off the concrete on the inner wall of the holding hopper. The driving assembly is simple in structure and convenient to install and operate.

Optionally, the unloading mechanism includes the motor of unloading of setting on the stirring host computer, rotates the articulated shaft of connecting on the stirring host computer and connects the discharge door on the articulated shaft, the articulated shaft is connected on the output shaft of the motor of unloading.

Through adopting above-mentioned technical scheme, when control discharge gate was opened and close, start the motor of unloading and rotate in order to drive the articulated shaft, the articulated shaft drives and unloads the bin gate rotation. When the discharge door shields the discharge port, the discharge port is closed, otherwise, the discharge port is opened.

Optionally, the energy-saving gear rack further comprises a linkage mechanism, the linkage mechanism comprises a rotating shaft, a first one-way bearing, a second one-way bearing, an energy-storing coil spring, a transmission assembly and a limiting assembly for limiting rotation of the driving gear ring, the rotating shaft is rotatably arranged on the rack, inner rings of the first one-way bearing and the second one-way bearing are fixedly sleeved on the rotating shaft, the driving gear is fixedly sleeved on an outer ring of the second one-way bearing, the rotating direction of the first one-way bearing is opposite to that of the second one-way bearing, two stress ends of the energy-storing coil spring are respectively connected to the rotating shaft and the rack, and the hinge shaft is in linkage connection with the outer ring of the first one-way bearing through the transmission assembly;

when the discharge door is closed by the discharge port and rotates to the discharge port and is opened, the transmission assembly drives the outer ring of the first one-way bearing to rotate, the inner ring and the outer ring of the first one-way bearing are relatively fixed, and the energy storage coil spring stretches.

Through adopting above-mentioned technical scheme, the motor of unloading passes through the articulated shaft control and unloads the bin gate and rotate when the discharge gate is opened, and through spacing subassembly restriction drive ring gear rotation, the articulated shaft passes through the outer lane rotation of the first one-way bearing of drive assembly drive. At the moment, the inner ring and the outer ring of the first one-way bearing are relatively fixed, so that the inner ring and the outer ring of the first one-way bearing rotate together, and the energy storage coil spring stretches. Because the second one-way bearing and the first one-way bearing rotate in opposite directions, the inner ring of the second one-way bearing can rotate relative to the outer ring of the second one-way bearing. After unloading the bin gate and rotating to the discharge gate and open completely, because spacing subassembly restriction drive ring gear rotates for drive gear can't rotate, under the effect of the one-way bearing of second, the unable drive axis of rotation of energy storage coil spring resets.

When the discharging motor controls the discharging door to rotate to the discharging port to be closed through the hinged shaft, the limit of the limiting assembly on the driving gear ring is removed, and the energy storage coil spring contracts and drives the rotating shaft to rotate and reset. The rotation axis drives the drive gear to rotate through the second one-way bearing, thereby driving the drive gear ring and the scraping rod to rotate, and scraping the concrete on the inner wall of the collecting hopper. At the moment, the rotating shaft drives the inner ring of the first one-way bearing to rotate relative to the single ring of the first one-way bearing, and the hinged shaft drives the outer ring of the first one-way bearing to rotate relative to the inner ring of the first one-way bearing through the transmission assembly.

Through above-mentioned structure for when the discharge gate is opened, the energy storage wind spring energy storage, when the discharge gate was closed, the energy storage wind spring unclamped and scraped the material pole through axis of rotation, second one-way bearing, drive gear and drive ring gear drive and rotate, realize the discharge gate promptly and close, scrape the effect that the material pole scraped the concrete.

Optionally, the transmission assembly comprises a worm rotatably arranged on the rack, a first transmission gear connected to the hinged shaft, a second transmission gear connected to the worm, a toothed belt sleeved on the first transmission gear and the second transmission gear, and a worm wheel sleeved and fixed on the outer ring of the first one-way bearing, wherein the worm wheel is meshed with the worm.

By adopting the technical scheme, the hinge shaft drives the first gear to rotate when rotating, the first gear drives the second gear to rotate through the toothed belt, the second gear drives the worm to rotate, and the worm drives the outer ring of the first one-way bearing to rotate through the worm wheel. Through above-mentioned structure for the articulated shaft rotates and to realize that first one way bearing's outer lane rotates, has reduced extra driving source setting.

Optionally, the limiting assembly comprises a limiting ring arranged on the driving toothed ring, a limiting block arranged on the rack in a sliding mode along the vertical direction, a moving block connected to the limiting block and a swinging rod arranged on the discharging door, a limiting groove is formed in the side wall of the limiting ring and is used for allowing the end portion of the limiting block to slide, a yielding groove used for allowing the end portion of the limiting ring to stretch into is formed in the side wall of the limiting block, a lifting groove is formed in the side wall of the moving block and is used for allowing the end portion of the swinging rod to slide, the lifting groove comprises a straight groove extending along the horizontal direction, and when the discharging door is rotated to the discharging port and is closed, the yielding groove is parallel and level with the limiting ring.

Through adopting above-mentioned technical scheme, drive the swinging arms rotation when unloading the bin gate and rotate, thereby the swinging arms slides in the straight flute and drives the stopper lift, when unloading the bin gate and rotating to the discharge gate and close, the groove of stepping down and spacing ring parallel and level, the spacing ring can rotate this moment to make the drive ring gear can rotate, be the unblock state this moment. When the discharge door is closed by the discharge port and rotates to the discharge port to be opened, the end part of the limiting block is inserted into the limiting groove, so that the limiting ring is limited to rotate, the driving gear ring is limited to rotate, and the locking state is achieved at the moment. Through above-mentioned structure for the drive ring gear only unloads the bin gate and rotates to the discharge gate and can rotate when closing, scrapes the material pole promptly and only the discharge gate can rotate when closing and scrape the concrete.

Optionally, the limiting assembly further comprises a return spring connected to the limiting block and used for driving the limiting block to move upwards, a moving-out groove communicated with the lifting groove is formed in the bottom wall of the moving block, the moving-out groove is used for allowing the end portion of the oscillating rod to slide, and when the discharge door rotates until the discharge port is closed, the oscillating rod is aligned with the moving-out groove.

Through adopting above-mentioned technical scheme, the in-process that rotates to the discharge gate to close is opened by the discharge gate to the discharge gate, supports through the swinging arms and presses on the cell wall of straight flute and drive movable block and stopper move down. The swing lever is aligned with the removal chute as the discharge gate is rotated until the discharge port is fully closed. Under reset spring's effect, the cell wall in the groove of stepping down supports and presses on the drive ring gear, rotates to spacing groove and stopper alignment back when drive gear, and the stopper shifts up, and the tip of stopper inserts in the spacing groove and the restriction drive ring gear rotates. Through the structure, the positioning function is achieved, the end part of the limiting block can be inserted into the limiting groove, and subsequent unlocking and locking are facilitated.

Optionally, the lifting groove is including still including the arc groove that the straight flute is linked together, the arc groove extends along the rotation direction of swinging arms, the arc groove communicates with the lifting groove mutually, when the tip of swinging arms slides and sets up in the arc groove, the groove of stepping down and spacing ring parallel and level.

Through adopting above-mentioned technical scheme, when unloading the bin gate and opening to rotate to the discharge gate by the discharge gate and close, the swinging arms slides earlier and sets up in the straight flute, and movable block and stopper move down this moment, then the swinging arms slides into the arc groove, because the rotation direction of the edge swinging arms of arc groove extends, unloads the bin gate and continues to rotate this moment and stopper and movable block are unmovable in vertical direction. When the oscillating rod slides in the arc groove, the abdicating groove is parallel and level with the limiting ring, the oscillating rod just moves into the arc groove, and the energy storage coil spring can be contracted and drives the driving gear ring to rotate through the rotating shaft, the second one-way bearing and the driving gear. The lifting groove is a straight groove, so that the discharge door is easy to rotate to close the discharge port, and the reset spring directly drives the limiting block to move upwards for resetting. Through above-mentioned structure, the energy storage coil spring can drive the drive ring gear through a plurality of parts and rotate.

In summary, the present application includes at least one of the following beneficial technical effects:

1. after the concrete mixer truck finishes loading, the discharge port is closed through the discharging mechanism, then the driving assembly drives the scraping rod to rotate and scrape the concrete on the inner wall of the collecting hopper to the concrete mixer truck, and compared with the concrete on the collecting hopper which drops on the ground, the waste of the concrete is reduced through the mixing station;

2. drive assembly, link gear and spacing subassembly for unload the bin gate and rotate to the discharge gate and close the back, scrape the material pole and can rotate and scrape the concrete that gathers in the hopper, need not manual control, and only need this driving source of the motor of unloading can drive and unload the bin gate and scrape the motion of material pole.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present application.

FIG. 2 is a schematic diagram of the embodiment of the present application with the up-run conveyor, the horizontal conveyor, and the batching station removed.

Fig. 3 is a partial structural schematic view for highlighting the discharging mechanism and the linkage mechanism in the embodiment of the application.

Fig. 4 is a schematic view of a partial structure of a salient limit component in the embodiment of the present application.

Description of the reference numerals:

1. a frame; 11. an upstream conveyor; 12. a horizontal conveyor belt; 13. a batching station; 2. a stirring main machine; 21. a discharge port; 3. collecting a hopper; 4. a scraping mechanism; 41. a scraping rod; 42. a drive assembly; 421. a drive gear ring; 422. a drive gear; 5. a discharge mechanism; 51. a discharging motor; 52. a discharge door; 53. hinging a shaft; 6. a linkage mechanism; 61. a rotating shaft; 62. a first one-way bearing; 63. a second one-way bearing; 64. an energy storage coil spring; 65. a transmission assembly; 651. a first drive gear; 652. a worm; 653. a second transmission gear; 654. a toothed belt; 655. a worm gear; 66. a limiting component; 661. a limiting ring; 6611. a limiting groove; 662. a limiting block; 6621. a yielding groove; 663. a moving block; 664. a return spring; 665. a swing lever; 666. lifting the groove; 6661. a straight groove; 6662. an arc groove; 667. and (4) moving out of the groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a concrete mixing plant. Referring to fig. 1 and 2, the concrete mixing plant includes a frame 1, a mixing main machine 2, a collecting hopper 3, an ascending conveyor belt 11, a horizontal conveyor belt 12, a batching station 13, a scraping mechanism 4, two sets of discharging mechanisms 5, and a linkage mechanism 6.

Referring to fig. 1 and 2, stirring host 2 and holding together hopper 3 are all fixed in frame 1, and discharge gate 21 has been seted up to stirring host 2's bottom, hold together hopper 3 and lie in discharge gate 21 under, and hold together the axis of hopper 3 and extend along vertical direction. The upper conveyer belt 11 is used for conveying raw materials to the stirring main machine 2, the horizontal conveyer belt 12 is used for conveying the raw materials to the upper conveyer belt 11, and the batching station 13 is used for batching and conveying the raw materials to the horizontal conveyer belt 12.

Referring to fig. 2 and 3, the two discharging mechanisms 5 are both disposed on the stirring host 2 and used for opening and closing the discharging hole 21, and each discharging mechanism 5 includes a discharging motor 51, a discharging door 52, and two hinge shafts 53. Articulated shaft 53 rotates and is connected on stirring host computer 2, and two articulated shafts 53 are located the both sides of stirring host computer 2 respectively, unload bin gate 52 and articulated shaft 53 fixed connection. The discharging motor 51 is fixed on the stirring main machine 2, an output shaft of the discharging motor 51 is fixedly connected with one of the hinged shafts 53, the rotating directions of the output shafts of the discharging motors 51 of the two discharging mechanisms 5 are opposite, and the discharging motor 51 is a servo motor capable of rotating forwards or backwards. The discharge doors 52 are rotated toward or away from each other by activating the discharge motor 51 such that the hinge shaft 53 rotates the discharge doors 52. Two are unloaded door 52 and are rotated to when contradicting each other in opposite directions, and discharge gate 21 is closed, and two are unloaded door 52 and rotate mutually in the opposite directions, then discharge gate 21 is opened.

Referring to fig. 2 and 3, the scraping mechanism 4 is used for scraping off the concrete on the inner wall of the gathering hopper 3, the scraping mechanism 4 includes two scraping rods 41 symmetrically arranged around the axis of the gathering hopper 3 and a driving assembly 42 for driving the two scraping rods 41 to rotate around the axis of the gathering hopper 3, and the two scraping rods 41 are both abutted to the inner wall of the gathering hopper 3.

Referring to fig. 3, the driving assembly 42 includes a driving gear ring 421 rotatably disposed on the collecting hopper 3 and a driving gear 422 meshed with the driving gear ring 421, the axis of the driving gear ring 421 is collinear with the axis of the collecting hopper 3, and both of the two scraping rods 41 are fixed on the bottom wall of the driving gear ring 421. The driving gear 422 is rotated to drive the driving gear ring 421 to rotate, so that the two scraping rods 41 rotate around the axis of the collecting hopper 3.

Referring to fig. 3, the discharging mechanism 5 is in linkage connection with the scraping mechanism 4 through a linkage mechanism 6, and the linkage mechanism 6 comprises a rotating shaft 61, a first one-way bearing 62, a second one-way bearing 63, an energy storage coil spring 64, a transmission assembly 65 and a limiting assembly 66. The rotating shaft 61 is rotatably arranged on the frame 1, inner rings of the first one-way bearing 62 and the second one-way bearing 63 are sleeved and fixed on the rotating shaft 61, the rotating directions of the first one-way bearing 62 and the second one-way bearing 63 are opposite, and the driving gear 422 is sleeved and fixed on an outer ring of the second one-way bearing 63. The energy storage coil spring 64 is sleeved on the rotating shaft 61, and two stressed ends of the energy storage coil spring 64 are respectively fixed on the rotating shaft 61 and the frame 1.

Referring to fig. 3, the transmission assembly 65 includes a first transmission gear 651 fixed on one of the hinge shafts 53 in a sleeved manner, a worm 652 rotatably disposed on the frame 1, a second transmission gear 653 fixedly sleeved on the worm 652, a toothed belt 654 sleeved on the first transmission gear 651 and the second transmission gear 653, and a worm wheel 655 fixed on the outer ring of the first one-way bearing 62 in a sleeved manner, wherein the worm wheel 655 is meshed with the worm 652.

Referring to fig. 2 and 3, when the discharging motor 51 drives one of the hinge shafts 53 to rotate, the discharging door 52 drives the other hinge shaft 53 to rotate. When the hinge shaft 53 rotates, the first transmission gear 651 is driven to rotate, and the first transmission gear 651 drives the worm 652 to rotate through the toothed belt 654 and the second transmission gear 653, so as to drive the worm wheel 655 and the outer ring of the first one-way bearing 62 to rotate. When the discharge door 52 is closed by the discharge port 21 and rotates to open the discharge port 21, the hinge shaft 53 drives the outer ring of the first one-way bearing 62 to rotate through the transmission assembly 65, at this time, the outer ring and the inner ring of the first one-way bearing 62 are relatively fixed, so that the inner ring and the outer ring of the first one-way bearing 62 rotate together, the rotating shaft 61 rotates together, and the energy storage coil spring 64 stretches and stores energy.

Referring to fig. 3 and 4, the limiting assembly 66 is used for limiting the rotation of the driving toothed ring 421, and the limiting assembly 66 includes a limiting ring 661 fixed on the driving toothed ring 421, a limiting block 662 slidably arranged on the frame 1 along the vertical direction, a moving block 663 fixed on the limiting block 662, a return spring 664 used for driving the limiting block 662 to move upwards and return, and a swing rod 665 fixed on one of the discharge doors 52. The axis of spacing ring 661 and the axis collineation of drive ring gear 421 have seted up two spacing grooves 6611 on the circumference lateral wall of spacing ring 661, and two spacing grooves 6611 are central symmetry around the axis of spacing ring 661, and spacing groove 6611 runs through the spacing ring 661 along vertical direction, and spacing groove 6611 is used for supplying the tip of stopper 662 to slide the setting.

Referring to fig. 3 and 4, the side wall of the limiting block 662 is provided with an abdicating groove 6621, and the abdicating groove 6621 is used for the end of the limiting ring 661 to extend into. The return spring 664 stretches in the vertical direction, and two ends of the return spring 664 are fixed to the bottom wall of the limiting block 662 and the rack 1 respectively. When the end of the limiting block 662 is inserted into the limiting groove 6611 and the return spring 664 is in a natural state, the abdicating groove 6621 is higher than the limiting ring 661.

Referring to fig. 4, a lifting groove 666 is formed in a side wall of the moving block 663, and the lifting groove 666 is used for the end of the swinging rod 665 to slide. The lifting groove 666 comprises a straight groove 6661 opened on the side wall of the moving block 663 and an arc groove 6662 communicated with the straight groove 6661, the straight groove 6661 extends along the horizontal direction, the arc groove 6662 extends along the rotating direction of the swinging rod 665, and the straight groove 6661 and the arc groove 6662 are used for the sliding arrangement of the end part of the swinging rod 665. A moving-out groove 667 extending in the vertical direction is formed in the bottom wall of the moving block 663, and the moving-out groove 667 is communicated with the arc groove 6662.

Referring to fig. 2-4, when the end of the rocking lever 665 is slidably disposed in the arc slot 6662, the relief slot 6621 is flush with the stop ring 661. When discharge gate 52 is rotated until discharge port 21 is closed, swing lever 665 is aligned with the out-chute 667.

The concrete mixing plant of the embodiment of the application has the following implementation principle: when the concrete mixer truck is loaded with concrete, the hinge shaft 53 is driven to rotate by the discharging motor 51, so that the discharging door 52 is driven to rotate until the discharging port 21 is opened. During the rotation of the hinge shaft 53, the outer ring of the first one-way bearing 62 is driven to rotate by the transmission assembly 65, the inner ring of the first one-way bearing 62 rotates together with the outer ring of the first one-way bearing 62 to drive the rotation shaft 61 to rotate, the energy storage coil spring 64 stretches the stored energy, and the inner ring of the second one-way bearing 63 rotates relative to the outer ring of the second one-way bearing 63 under the action of the rotation shaft 61. After the discharge port 21 is completely opened, the end of the limiting block 662 is inserted into the limiting groove 6611, so that the rotation of the driving gear ring 421 is limited, the driving gear ring 421 limits the rotation of the driving gear 422 and the outer ring of the second one-way bearing 63, and the recovery of the energy storage coil spring 64 is limited, and the inner ring of the second one-way bearing 63 is driven to rotate.

After the concrete mixer car finishes loading, drive the (mixing) shaft reversal through unloading motor 51 to make two discharge doors 52 rotate to contradicting each other in opposite directions, thereby close discharge gate 21. The swinging rod 665 is driven to rotate in the rotating process of the discharging door 52, the swinging rod 665 moves into the straight groove 6661 and is pressed against the lower groove wall of the straight groove 6661, and therefore the moving block 663 is pushed to drive the limiting block 662 to move downwards. When the end of the swinging rod 665 moves to the communication position between the arc groove 6662 and the abdicating groove 6621, the limiting block 662 moves downwards to the abdicating groove 6621 to be flush with the limiting ring 661, at this time, the energy storage coil spring 64 contracts and drives the rotating shaft 61 to rotate, the rotating shaft 61 drives the driving gear 422 to rotate through the second one-way bearing 63, and the driving gear 422 drives the two scraping rods 41 to rotate through the driving gear ring 421 so as to scrape the concrete on the inner wall of the gathering hopper 3 to the concrete mixer. As the discharge door 52 rotates until the discharge port 21 is completely closed, the swinging rod 665 moves to align with the moving-out slot 667, and the lower slot wall of the relief slot 6621 is pressed against the stop ring 661 under the action of the return spring 664. After the driving toothed ring 421 rotates for a half turn, the other limiting groove 6611 is aligned with the end of the limiting block 662, under the action of the return spring 664, the limiting block 662 moves upwards, the end of the limiting block 662 is inserted into the other limiting groove 6611 to limit the limiting ring 661 and the driving toothed ring 421 to rotate, and the end of the swinging rod 665 moves out of the moving-out groove 667.

Compare and directly drive away in concrete mixer truck, hold together the concrete drippage on the hopper 3 in ground, this application mixing plant has reduced the waste of concrete.

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

1. The utility model provides a concrete mixing plant, includes frame (1) and stirring host computer (2) of setting in frame (1), be provided with discharge gate (21) on stirring host computer (2), be provided with under discharge gate (21) and hold together hopper (3), its characterized in that: the stirring main machine (2) is provided with a discharging mechanism (5) for opening and closing the discharging port (21), the material collecting hopper (3) is provided with a scraping mechanism (4), and the scraping mechanism (4) comprises a scraping rod (41) abutting against the inner wall of the material collecting hopper (3) and a driving assembly (42) for driving the scraping rod (41) to rotate around the axis of the material collecting hopper (3);

the driving assembly (42) comprises a driving gear ring (421) rotatably arranged on the material collecting hopper (3) and a driving gear (422) meshed with the driving gear ring (421), the axis of the driving gear ring (421) is collinear with the axis of the material collecting hopper (3), and the scraping rod (41) is connected to the driving gear ring (421);

the discharging mechanism (5) comprises a discharging motor (51) arranged on the stirring main machine (2), a hinged shaft (53) rotatably connected to the stirring main machine (2) and a discharging door (52) connected to the hinged shaft (53), and the hinged shaft (53) is connected to an output shaft of the discharging motor (51);

the energy-saving gear train is characterized by further comprising a linkage mechanism (6), wherein the linkage mechanism (6) comprises a rotating shaft (61), a first one-way bearing (62), a second one-way bearing (63), an energy storage coil spring (64), a transmission assembly (65) and a limiting assembly (66) for limiting rotation of a driving gear ring (421), the rotating shaft (61) is rotatably arranged on the rack (1), inner rings of the first one-way bearing (62) and the second one-way bearing (63) are fixedly sleeved on the rotating shaft (61), a driving gear (422) is fixedly sleeved on an outer ring of the second one-way bearing (63), the rotating direction of the first one-way bearing (62) is opposite to that of the second one-way bearing (63), two stress ends of the energy storage coil spring (64) are respectively connected to the rotating shaft (61) and the rack (1), and the hinge shaft (53) is in linkage connection with the outer ring of the first one-way bearing (62) through the transmission assembly (65);

when the discharge door (52) is closed by the discharge port (21) and rotates to the open state of the discharge port (21), the transmission assembly (65) drives the outer ring of the first one-way bearing (62) to rotate, the inner ring and the outer ring of the first one-way bearing (62) are relatively fixed, and the energy storage coil spring (64) is stretched.

2. A concrete mixing plant according to claim 1, characterized in that: the transmission assembly (65) comprises a worm (652) rotatably arranged on the rack (1), a first transmission gear (651) connected to the hinge shaft (53), a second transmission gear (653) connected to the worm (652), a toothed belt (654) sleeved on the first transmission gear (651) and the second transmission gear (653) and a worm wheel (655) sleeved and fixed on the outer ring of the first one-way bearing (62), wherein the worm wheel (655) is meshed with the worm (652).

3. A concrete mixing plant according to claim 2, characterized in that: spacing subassembly (66) including setting up spacing ring (661) on drive ring gear (421), along vertical direction slip setting stopper (662) on frame (1), connect movable block (663) on stopper (662) and set up swinging arms (665) on discharge door (52), spacing groove (6611) have been seted up on the lateral wall of spacing ring (661), spacing groove (6611) are used for supplying the tip of stopper (662) to slide, set up the groove of stepping down (6621) that is used for supplying spacing ring (661) tip to stretch into on the lateral wall of stopper (662), the lifting groove has been seted up on the lateral wall of movable block (663), the lifting groove is used for supplying the tip of swinging arms (665) to slide, the lifting groove includes straight flute (6661) that extend along the horizontal direction, when discharge door (52) rotate to discharge gate (21) and close, stepping down groove (6621) and spacing ring (661) parallel and level.

4. A concrete mixing plant according to claim 3, characterized in that: the limiting assembly (66) further comprises a return spring (664) connected to the limiting block (662) and used for driving the limiting block (662) to move upwards, a moving-out groove (667) communicated with the lifting groove is formed in the bottom wall of the moving block (663), the moving-out groove (667) is used for enabling the end portion of the swinging rod (665) to slide, and when the discharging door (52) rotates until the discharging hole (21) is closed, the swinging rod (665) is aligned with the moving-out groove (667).

5. A concrete mixing plant according to claim 4, characterized in that: the lifting groove further comprises an arc groove (6662) communicated with the straight groove (6661), the arc groove (6662) extends along the rotation direction of the swinging rod (665), the arc groove (6662) is communicated with the lifting groove, when the end of the swinging rod (665) is arranged in the arc groove (6662) in a sliding mode, the abdicating groove (6621) is flush with the limit ring (661).