CN211466976U - Optimized mixing station - Google Patents

Abstract

The application relates to an efficient concrete mixing plant, in particular to an optimized mixing plant; the device comprises a coarse aggregate weighing hopper, a fine aggregate weighing hopper, a conveying belt, an aggregate waiting bin, a stirrer and a buffer storage bin; the coarse aggregate weighing hopper and the fine aggregate weighing hopper are respectively connected to the front end of the conveying belt, and the tail end of the conveying belt is connected to an inlet of an aggregate waiting bin; the aggregate waiting bin comprises a distributing bin and a temporary storage bin which are fixed together from top to bottom; store up the storehouse middle part temporarily and be equipped with vertical partition panel, the partition panel will store up the storehouse temporarily and divide into independent stone storehouse and independent sand silo. Due to the implementation of the technical scheme, the mortar can be firstly stirred in the stirrer, and then enters the stirrer for stirring after stones, so that the quality of concrete is improved, the overflow performance of the concrete is improved, the stirring impact is reduced, the power consumption of the stirrer is reduced, and the energy is saved; the mixer can be used for stirring and blanking, so that the concrete falling impact can be reduced, and the splashing can be reduced.

Description

Optimized mixing station

Technical Field

The application relates to a high-efficient concrete mixing plant especially relates to an optimize mixing plant.

Background

The mixer is a mechanical device for mixing and stirring cement, gravel aggregate and water into a concrete mixture. For a large mixing station, the aggregates can enter the intermediate material waiting bin before entering the mixer, and the design is to relieve the impact force of the aggregates and increase the mixing efficiency. However, the stock bin used at present stores a mixture of coarse and fine aggregates.

Experiments of our company show that the quality of the concrete is improved by premixing the mortar and then mixing the stones, the cement consumption is saved, and the concrete overflow performance is improved; the experimental data are shown in the following table.

However, no stock bin for the stirring process is available on the market at present.

When concrete flows out of a discharge port of the mixer and enters the tank truck, the concrete falls vertically due to a certain distance between the discharge port of the mixer and a port of the tank truck, the concrete is splashed outwards easily when entering the port of the tank truck, the port is dirty and messy, manual cleaning is difficult, the concrete falling at a high speed impacts the tank truck, raw materials are wasted, and the service life of equipment is prolonged. In addition, in the production of the existing concrete mixing plant, the material can be discharged only after the tank car enters the plant and stops at the reference position; the time of entering the station and stopping the swing is wasted.

Disclosure of Invention

An object of this application is to provide an optimize mixing plant that improves the stirring concrete quality, avoids splashing, improves work efficiency.

The application is realized as follows: an optimized mixing station comprises a coarse aggregate weighing hopper, a fine aggregate weighing hopper, a conveying belt, an aggregate waiting bin, a mixer and a buffer storage bin; the coarse aggregate weighing hopper and the fine aggregate weighing hopper are respectively connected to the front end of the conveying belt, and the tail end of the conveying belt is connected to an inlet of an aggregate waiting bin; the aggregate waiting bin comprises a distributing bin and a temporary storage bin which are fixed together from top to bottom; the middle part of the temporary storage bin is provided with a vertical partition plate which divides the temporary storage bin into an independent stone bin and an independent sand bin; the bottoms of the stone bin and the sand bin are respectively provided with a discharge door capable of being opened and closed; the top of the material distribution bin is open, a control turning plate is arranged in the material distribution bin, a first rotating shaft is arranged at the lower end of the control turning plate and is rotatably arranged in the material distribution bin through the first rotating shaft, the first rotating shaft is connected with a bidirectional motor, and the limit positions of the rotation of the control turning plate are the inner walls of two sides of the material distribution bin; the buffer storage cylinder comprises a charging cylinder of an inverted cone-shaped cylinder, and the upper end of the charging cylinder is provided with a feeding hole capable of coating the discharging hole of the stirrer; a central rod is arranged at the lower part of the charging barrel, and a spiral disc is fixedly connected between the central rod and the inner wall of the charging barrel; the lower end of the charging barrel is provided with an inclined notch; the inclined notch is matched with a control door which can be opened and is used for sealing the inclined notch.

Further, the device also comprises a control circuit; the outlet of the coarse aggregate weighing hopper is connected with a first control switch capable of opening the outlet of the coarse aggregate weighing hopper, and the outlet of the fine aggregate weighing hopper is connected with a second control switch capable of opening the outlet of the fine aggregate weighing hopper; the inner walls at two sides of the material distribution bin are respectively provided with a first travel switch and a second travel switch corresponding to the turning limit positions of the control turning plate; a first branch, a second branch, a third branch and a fourth branch are connected in parallel between the positive pole and the negative pole of the control circuit; the first branch is connected with a first control switch and a second time relay coil in series; a second control switch and a third time relay coil are connected in series on the second branch; the third branch is connected with a first travel switch, a second time relay normally open contact, a first relay coil and a second relay normally closed contact in series; the fourth branch is connected with a second travel switch, a third time relay normally open contact, a second relay coil and a first relay normally closed contact in series; the first relay normally open contact and the second relay normally open contact are respectively connected in a forward and reverse circuit of the motor.

Further, a first time relay coil and a first time relay normally closed contact are connected in series on the first branch; the second branch is also connected with a first time relay normally open contact and a third time relay normally closed contact in series.

Further, the first rotating shaft is positioned at the top of the partition plate; the control turning plate is in a shape of inclining outwards and inwards and seals the upper port of the stone bin or the sand bin corresponding to the rotating limit position of the control turning plate.

Further, the material distribution bin is rectangular; the temporary storage bin is in a regular quadrangular frustum pyramid shape with a large upper part and a small lower part; the bottom port of the material distribution bin is matched and integrally connected with the top port of the temporary storage bin.

Furthermore, the height of the bottom surface of the partition plate is consistent with that of the temporary storage bin, and the partition plate divides the bottom of the temporary storage bin into a stone discharge port and a sand discharge port; a discharge door is arranged at the bottom of the stone bin and can be outwards rotated through a second rotating shaft and can close or open the stone discharge hole; the other discharge door can be outwards rotated through a third rotating shaft and is arranged at the bottom of the sand silo and can close or open the sand discharge hole.

Further, the bottom of the temporary storage bin is connected with a calibration bin in a shape of a regular quadrangular frustum pyramid with a large upper part and a small lower part; the bottom port of the temporary storage bin is connected with the top port of the calibration bin in a matching way; the included angle between the side edge of the calibration bin and the horizontal plane is smaller than the included angle between the side edge of the temporary storage bin and the horizontal plane; the discharge door of the opened pebble discharge port or sand discharge port is tightly attached to the inner wall of the calibration bin.

Furthermore, the side walls of the two sides of the material distribution bin are respectively provided with a transverse groove formed by sinking, and the top of the control turning plate which is turned to the limit position is matched with the clamping seat in the transverse groove; the side walls of the two sides of the material distribution bin are respectively provided with a support lug which extends inwards, and the middle part of the control turning plate which is turned to the limit position is arranged on the support lug.

The number of layers of the spiral disk is not less than two layers and not more than five layers, and the included angle between the spiral disk and the horizontal plane is not less than 20 degrees.

The feed inlet is provided with an anti-splash ring which extends inwards and is connected to the discharge outlet of the stirrer, and the lower end surface of the anti-splash ring is provided with a spray communicated with the outside; the control door comprises a square frame fixed on the inclined buckle and a hydraulic cylinder fixed on the square frame, a track is arranged in the frame, a sliding door capable of matching the inclined notch with the closed sliding door is slidably arranged in the track, and one end of the sliding door is fixedly connected to a valve rod of the hydraulic cylinder.

Due to the implementation of the technical scheme, the temporary storage bin is divided into the independent stone bin and the independent sand bin through the partition plate, the control turning plate at the top of the partition plate can rotate towards two sides, and after the control turning plate rotates to be in contact with the inner wall of the material distribution bin, the upper end opening of the stone bin or the upper end opening of the sand bin can be sealed; at the moment, mortar or stones conveyed from the conveying belt enter a specified bin; therefore, the mortar can be firstly stirred in the stirrer, and then the stones are stirred in the stirrer, so that the quality of the concrete is improved, the overflow of the concrete is improved, the stirring impact is reduced, the power consumption of the stirrer is reduced, and the energy is saved; when the stirrer can be used for stirring and blanking, the control door is closed, so that the utilization rate of equipment can be improved, and the production efficiency is improved; concrete can be temporarily stored in the storage bin; the control door reduces the blanking height, so that the concrete falling impact can be reduced, and the splashing can be reduced; after the control door is opened, the concrete can pass through the buffering and the deceleration of the spiral disc and then is discharged from the control door, so that the falling impact of the concrete can be further reduced, and the splashing is avoided.

Drawings

The specific structure of the application is given by the following figures and examples:

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present application;

FIG. 2 is a schematic sectional view of an aggregate storage bin;

FIG. 3 is a schematic view of the external structure of an aggregate storage bin;

FIG. 4 is a schematic view of a portion of the enlarged structure at I in FIG. 2;

FIG. 5 is a schematic diagram of the connections of the control circuit;

FIG. 6 is a wiring schematic of the bi-directional motor;

FIG. 7 is a schematic view of the structure of the buffer storage bin;

fig. 8 is a view from direction a of fig. 7.

Legend: 1. a material distribution bin, 2, a partition board, 3, a stone bin, 4, a sand bin, 5, a discharge door, 6, a control turning plate, 7, a first rotating shaft, 8, a second rotating shaft, 9, a third rotating shaft, 10, a calibration bin, 11, a transverse groove, 12, a lug, 13, a two-way motor, 14, a coarse aggregate weighing hopper, 15, a fine aggregate weighing hopper, 16, a conveying belt, 17, a first control switch, 18, a second control switch, 19, a charging barrel, 20, a central rod, 21, a spiral disc, 22, a splash-proof ring, 23, a nozzle, 24, a hydraulic cylinder, 25, a drawing door, 26, a stirrer, 27, a frame, KT21, a second time relay coil, KT22, a second time relay normally-open contact, KT31, a third time relay coil, KT32, a third time relay normally-open contact, KT11, a first time relay coil, KT12, a first time relay normally-closed contact, KT13, a first time relay normally-open contact, SQ01. first travel switch, SQ02. second travel switch, KM11. first relay coil, KM12. first relay normally closed contact, KM13. first relay normally open contact, KM21. second relay coil, KM22. second relay normally closed contact, KM23. second relay normally open contact.

Detailed Description

The present application is not limited to the following examples, and specific implementations may be determined according to the technical solutions and practical situations of the present application.

In the embodiment, as shown in fig. 1 to 8, an optimized mixing station comprises a coarse aggregate weighing hopper 14, a fine aggregate weighing hopper 15, a conveying belt 16, an aggregate waiting bin, a mixer 26 and a buffer storage bin; the coarse aggregate weighing hopper 14 and the fine aggregate weighing hopper 15 are respectively connected to the front end of a conveyer belt 16, and the tail end of the conveyer belt 16 is connected to an inlet of an aggregate waiting bin; the aggregate waiting bin comprises a distributing bin 1 and a temporary storage bin which are fixed together from top to bottom; the middle part of the temporary storage bin is provided with a vertical partition plate 2, and the partition plate 2 divides the temporary storage bin into an independent stone bin 3 and an independent sand bin 4; the bottoms of the stone bin 3 and the sand bin 4 are respectively provided with a discharge door 5 which can be opened and closed; the top of the material distribution bin 1 is open, a control turning plate 6 is arranged in the material distribution bin 1, a first rotating shaft 7 is arranged at the lower end of the control turning plate 6 and rotatably installed in the material distribution bin 1 through the first rotating shaft 7, the first rotating shaft 7 is connected with a bidirectional motor 13, and the rotating limit positions of the control turning plate 6 are the inner walls of two sides of the material distribution bin 1; the buffer storage barrel 19 comprises a charging barrel 19 of an inverted cone-shaped barrel, and the upper end of the charging barrel 19 is provided with a feeding hole capable of coating the discharging hole of the stirrer 26; a central rod 20 is arranged at the lower part of the charging barrel 19, and a spiral disc 21 is fixedly connected between the central rod 20 and the inner wall of the charging barrel 19; the lower end of the charging barrel 19 is provided with an inclined notch; the inclined notch is matched with a control door which can be opened and is used for sealing the inclined notch.

The top of the coarse aggregate weighing hopper 14 is connected with a coarse aggregate storage bin, and the top of the fine aggregate weighing hopper 15 is connected with a fine aggregate storage bin; the conveyor belt 16 includes a flat belt and a feeding belt, and an end of the feeding belt is connected to an inlet of the aggregate waiting bin.

The warehouse has a simple structure, and can finish the warehouse-dividing storage of coarse aggregate and fine aggregate. After the material mixing is finished, the discharge door 5 of the sand bin 4 is opened, and the mortar falls into the stirrer 26 for stirring; after the completion, the discharge door 5 of the pebble bin 3 is opened, and the pebbles fall down and enter the stirrer 26 for stirring; the quality of the concrete is improved, the concrete overflow performance is improved, the stirring impact is reduced, the power consumption of the stirrer 26 is reduced, and the energy is saved.

When the tank car enters the station and is aligned, the stirrer 26 can stir and discharge materials, so that the utilization rate of equipment is improved, and the production efficiency is improved; concrete will be temporarily stored in the barrel 19; the control door reduces the blanking height, so that the concrete falling impact can be reduced, and the splashing can be reduced; after the control door is opened, concrete in the charging barrel 19 falls from the position of the control door to enter the tank car, and new concrete of the mixer 26 falls into the charging barrel 19 and is relieved by the existing concrete in the charging barrel 19 on one hand, and on the other hand, the concrete is buffered and decelerated through the spiral disc 21, so that falling impact of the concrete can be further reduced, and splashing is avoided.

As shown in fig. 5 to 6, the present application further includes a control circuit; the outlet of the coarse aggregate weighing hopper 14 is connected with a first control switch 17 capable of opening the outlet of the coarse aggregate weighing hopper 14, and the outlet of the fine aggregate weighing hopper 15 is connected with a second control switch 18 capable of opening the outlet of the fine aggregate weighing hopper 15; the inner walls of the two sides of the material distribution bin 1 are respectively provided with a first travel switch SQ01 and a second travel switch SQ02 corresponding to the turning limit positions of the control turning plate 6; a first branch, a second branch, a third branch and a fourth branch are connected in parallel between the positive pole and the negative pole of the control circuit; the first branch is connected with a first control switch 17 and a second time relay coil KT21 in series; the second branch is connected with a second control switch 18 and a third time relay coil KT31 in series; the third branch is connected with a first travel switch SQ01, a second time relay normally open contact KT22, a first relay coil KM11 and a second relay normally closed contact KM22 in series; a second travel switch SQ02, a third time relay normally open contact KT32, a second relay coil KM21 and a first relay normally closed contact KM12 are connected in series on the fourth branch; the first relay normally open contact KM13 and the second relay normally open contact KM23 are respectively connected in the positive and negative rotation circuit of the motor.

The first control switch 17 and the second control switch 18 can be manual button switches or can be automatically controlled by a controller, and are all well-known and commonly used in the prior art. The second time relay delay time is the time for conveying coarse aggregate to the aggregate waiting bin through the conveying belt 16 after the coarse aggregate is discharged from the coarse aggregate weighing hopper 14, and the third time relay delay time is the time for conveying fine aggregate to the aggregate waiting bin through the conveying belt 16 after the fine aggregate is discharged from the fine aggregate weighing hopper 15. The bottom of the stone bin 3 and the bottom of the sand bin 4 are respectively provided with a discharge door 5 which can be opened and closed and can be driven by a rotating motor, and the method is a known public technology.

When the device works, the coarse aggregate weighing hopper 14 is opened for discharging, the first control switch 17 gives a signal, the second time relay coil KT21 is electrified, the second time relay normally-open contact KT22 is closed, the first relay coil KM11 is electrified, the motor starts to rotate positively, the control turning plate 6 is turned to one side of the sand bin 4 until the turning plate abuts against the inner wall of the material distributing bin 1, the first travel switch SQ01 is triggered, the first relay coil KM11 is electrified, the motor stops working, and when the metered coarse aggregates completely enter the stone bin 3; the unloading is opened to fine aggregate weighing hopper 15, second control switch 18 gives the signal, third time relay coil KT31 gets electric, third time relay normally open contact KT32 is closed, second relay coil KM21 gets electric, the motor begins reverse rotation, control turns over board 6 and turns to 3 one sides in stone storehouse, touch second travel switch SQ02 after propping up with the inner wall of branch feed bin 1 until, first relay coil KM11 loses the electricity, the motor stop work, fine aggregate that the wait to measure is whole to get into sand silo 4.

As shown in fig. 5 and 6, the first branch is also connected in series with a first time relay coil KT11 and a first time relay normally-closed contact KT 12; the second branch is also connected with a first time relay normally open contact KT13 and a third time relay normally closed contact in series.

When the coarse aggregate weighing hopper 14 is opened for blanking, after the first control switch 17 gives a signal, the first time relay coil KT11 is electrified, and the first time relay normally open contact KT13 is closed in a delayed mode. The first time relay delay time is the blanking time of the coarse aggregate weighing hopper 14, so that only when the second control switch 18 gives a signal and the first time relay delay time meets the requirement, the fine aggregate weighing hopper 15 can perform blanking, and mortar and pebble mixing is avoided.

As shown in fig. 2 to 4, the first rotating shaft 7 is located at the top of the partition plate 2; the control turning plate 6 is in a shape of inclining outwards and inwards and seals the upper end opening of the stone bin 3 or the sand bin 4 corresponding to the rotating limit position of the control turning plate 6. When the control turning plate 6 is at the limit position, the control turning plate is in a shape of inclining outwards and inwards, and the upper end opening of the stone bin 3 or the sand bin 4 is sealed. The falling materials can slide into the corresponding bin along the control turning plate 6, so that the control turning plate 6 is prevented from being overstressed.

As shown in fig. 2 to 4, the distribution bin 1 is rectangular; the temporary storage bin is in a regular quadrangular frustum pyramid shape with a large upper part and a small lower part; the bottom port of the material distributing bin 1 is matched and integrally connected with the top port of the temporary storage bin.

The temporary storage bin with the large upper part and the small lower part can provide larger pressure for the aggregates stored at the lower end, and is convenient to discharge.

As shown in fig. 2 to 4, the height of the bottom surface of the partition plate 2 is consistent with that of the temporary storage bin, and the partition plate 2 divides the bottom of the temporary storage bin into a stone discharge port and a sand discharge port; a discharge door 5 is arranged at the bottom of the stone bin 3 and can be outwards rotated through a second rotating shaft 8 and can close or open the stone discharge hole; the other discharging door 5 is arranged at the bottom of the sand silo 4 and can close or open the sand outlet through a third rotating shaft 9 in an outward rotating mode.

As shown in fig. 2 to 4, the bottom of the temporary storage bin is connected with a calibration bin 10 in the shape of a regular quadrangular frustum pyramid with a large upper part and a small lower part; the bottom port of the temporary storage bin is connected with the top port of the calibration bin 10 in a matching way; the included angle between the lateral edge of the calibration bin 10 and the horizontal plane is smaller than the included angle between the lateral edge of the temporary storage bin and the horizontal plane; the discharge door 5 of the opened pebble discharge port or sand discharge port is tightly attached to the inner wall of the calibration bin 10.

After the discharge door 5 of the opened pebble discharge port or sand discharge port is tightly attached to the inner wall of the calibration bin 10, the aggregate can slide downwards along the discharge door 5; like this can the maximize save space, need not to open whole the ejection of compact door 5 and can the ejection of compact.

Without the calibration bin 10, the mortar falling into the mixer 26 is located on one side of the inlet of the mixer 26, and the stones falling into the mixer 26 are located on the other side of the inlet of the mixer 26, so that on one hand, the impact force is large, and on the other hand, the working strength of the two mixing shafts in the mixer 26 is always kept large or small, which is detrimental to the service life of the equipment.

The inner wall of the calibration bin 10 which is relatively gentle can buffer the impact force of falling materials, the materials fall in the center of the inlet of the stirrer 26 in a centralized mode, the working strength of two stirring shafts in the stirrer 26 is balanced, and the service life of equipment is prolonged.

As shown in fig. 2 to 4, the side walls of the two sides of the distribution bin 1 are respectively provided with a transverse groove 11 formed by a recess, and the top of the control turning plate 6 which is turned to the limit position is matched with the clamping seat in the transverse groove 11; the side walls of the two sides of the material distribution bin 1 are respectively provided with a support lug 12 which extends inwards, and the middle part of the control turning plate 6 which rotates to the limit position is seated on the support lugs 12.

The design of the transverse groove 11 and the support lug 12 can enable the control turning plate 6 to bear impact with higher strength, and the service life of the equipment is prolonged.

As shown in fig. 7 and 8, the number of layers of the spiral disc 21 is not less than two and not more than five, and the included angle between the spiral disc 21 and the horizontal plane is not less than 20 °.

The number of layers of the spiral plate 21 is too small, and the impact velocity of the concrete cannot be effectively reduced, but due to the characteristics of the concrete, if the number of layers is too large and the included angle between the spiral plate 21 and the horizontal plane is too small, the concrete may be locally coagulated and adhered to the spiral plate 21.

As shown in fig. 7 and 8, the feeding hole is provided with a splash-proof ring 22 extending inwards and connected to the discharging hole of the mixer 26, and the lower end surface of the splash-proof ring 22 is provided with a spray communicated with the outside; the control door comprises a square frame 27 fixed on the oblique-cutting buckle and a hydraulic cylinder 24 fixed on the square frame 27, a track is arranged in the frame 27, a pull door 25 capable of matching the oblique cut with the square frame in a sealing mode is slidably arranged in the track, and one end of the pull door 25 is fixedly connected to a valve rod of the hydraulic cylinder 24.

The splash ring 22 enables the mixer 26 to be better matched and butted with a discharge hole of the mixer to form good sealing; and is suitable for discharge ports of blenders 26 with different sizes within a certain range. After the charging barrel 19 is used, the spray head 23 is opened to spray water downwards to clean the concrete deposited on the spiral disc 21.

The above technical features constitute the best embodiment of the present application, which has strong adaptability and best implementation effect, and unnecessary technical features can be added or subtracted according to actual needs to meet the needs of different situations.

Claims (10)

1. An optimized mixing plant, characterized in that: comprises a coarse aggregate weighing hopper, a fine aggregate weighing hopper, a conveyer belt, an aggregate waiting bin, a stirrer and a buffer storage bin; the coarse aggregate weighing hopper and the fine aggregate weighing hopper are respectively connected to the front end of the conveying belt, and the tail end of the conveying belt is connected to an inlet of an aggregate waiting bin; the aggregate waiting bin comprises a distributing bin and a temporary storage bin which are fixed together from top to bottom; the middle part of the temporary storage bin is provided with a vertical partition plate which divides the temporary storage bin into an independent stone bin and an independent sand bin; the bottoms of the stone bin and the sand bin are respectively provided with a discharge door capable of being opened and closed; the top of the material distribution bin is open, a control turning plate is arranged in the material distribution bin, a first rotating shaft is arranged at the lower end of the control turning plate and is rotatably arranged in the material distribution bin through the first rotating shaft, the first rotating shaft is connected with a bidirectional motor, and the limit positions of the rotation of the control turning plate are the inner walls of two sides of the material distribution bin; the buffer storage cylinder comprises a charging cylinder of an inverted cone-shaped cylinder, and the upper end of the charging cylinder is provided with a feeding hole capable of coating the discharging hole of the stirrer; a central rod is arranged at the lower part of the charging barrel, and a spiral disc is fixedly connected between the central rod and the inner wall of the charging barrel; the lower end of the charging barrel is provided with an inclined notch; the inclined notch is matched with a control door which can be opened and is used for sealing the inclined notch.

2. An optimized mixing plant according to claim 1, characterized in that: also includes a control circuit; the outlet of the coarse aggregate weighing hopper is connected with a first control switch capable of opening the outlet of the coarse aggregate weighing hopper, and the outlet of the fine aggregate weighing hopper is connected with a second control switch capable of opening the outlet of the fine aggregate weighing hopper; the inner walls at two sides of the material distribution bin are respectively provided with a first travel switch and a second travel switch corresponding to the turning limit positions of the control turning plate; a first branch, a second branch, a third branch and a fourth branch are connected in parallel between the positive pole and the negative pole of the control circuit; the first branch is connected with a first control switch and a second time relay coil in series; a second control switch and a third time relay coil are connected in series on the second branch; the third branch is connected with a first travel switch, a second time relay normally open contact, a first relay coil and a second relay normally closed contact in series; the fourth branch is connected with a second travel switch, a third time relay normally open contact, a second relay coil and a first relay normally closed contact in series; the first relay normally open contact and the second relay normally open contact are respectively connected in a forward and reverse circuit of the motor.

3. An optimized mixing plant according to claim 2, characterized in that: the first branch is also connected with a first time relay coil and a first time relay normally closed contact in series; the second branch is also connected with a first time relay normally open contact and a third time relay normally closed contact in series.

4. An optimised mixing plant as claimed in claim 1, 2 or 3, wherein: the first rotating shaft is positioned at the top of the partition plate; the control turning plate is in a shape of inclining outwards and inwards and seals the upper port of the stone bin or the sand bin corresponding to the rotating limit position of the control turning plate.

5. An optimized mixing plant according to claim 4, characterized in that: the material distribution bin is rectangular; the temporary storage bin is in a regular quadrangular frustum pyramid shape with a large upper part and a small lower part; the bottom port of the material distribution bin is matched and integrally connected with the top port of the temporary storage bin.

6. An optimized mixing plant according to claim 4, characterized in that: the height of the bottom surface of the partition plate is consistent with that of the temporary storage bin, and the partition plate divides the bottom of the temporary storage bin into a stone discharge port and a sand discharge port; a discharge door is arranged at the bottom of the stone bin and can be outwards rotated through a second rotating shaft and can close or open the stone discharge hole; the other discharge door can be outwards rotated through a third rotating shaft and is arranged at the bottom of the sand silo and can close or open the sand discharge hole.

7. An optimised mixing plant as claimed in claim 5 or 6, wherein: the bottom of the temporary storage bin is connected with a calibration bin in a shape of a regular quadrangular frustum pyramid with a big top and a small bottom; the bottom port of the temporary storage bin is connected with the top port of the calibration bin in a matching way; the included angle between the side edge of the calibration bin and the horizontal plane is smaller than the included angle between the side edge of the temporary storage bin and the horizontal plane; the discharge door of the opened pebble discharge port or sand discharge port is tightly attached to the inner wall of the calibration bin.

8. An optimised mixing plant as claimed in claim 5 or 6, wherein: the side walls of the two sides of the material distribution bin are respectively provided with a transverse groove formed by sinking, and the top of the control turning plate which is turned to the limit position is matched with the clamping seat in the transverse groove; the side walls of the two sides of the material distribution bin are respectively provided with a support lug which extends inwards, and the middle part of the control turning plate which is turned to the limit position is arranged on the support lug.

9. An optimised mixing plant as claimed in claim 1, 2 or 3, wherein: the number of layers of the spiral disk is not less than two layers and not more than five layers, and the included angle between the spiral disk and the horizontal plane is not less than 20 degrees.

10. An optimized mixing plant according to claim 9, characterized in that: the feed inlet is provided with an anti-splash ring which extends inwards and is connected to the discharge outlet of the stirrer, and the lower end surface of the anti-splash ring is provided with a spray communicated with the outside; the control door comprises a square frame fixed on the inclined buckle and a hydraulic cylinder fixed on the square frame, a track is arranged in the frame, a sliding door capable of matching the inclined notch with the closed sliding door is slidably arranged in the track, and one end of the sliding door is fixedly connected to a valve rod of the hydraulic cylinder.

Images