CN115091620A - Premixed concrete gravel belt conveying system and operation method - Google Patents

Abstract

The invention relates to a ready mixed concrete gravel belt conveying system and an operation method, wherein the ready mixed concrete gravel belt conveying system comprises a gravel inclined belt conveying and weighing subsystem, a gravel belt tensioning and adjusting subsystem, a gravel belt automatic cleaning subsystem and a gravel belt deviation preventing subsystem; the method mainly comprises the following operation steps: equipment installation; tensioning and debugging a belt; feeding sandstone aggregate; transporting the sandstone aggregate; unloading the sandstone aggregate; removing mud and cleaning by a rotary belt; weighing sandstone aggregate; and stirring and producing commercial concrete. The invention has the beneficial effects that: the belt conveying system is convenient and quick to disassemble and assemble; accurately weighing the mass of the sandstone aggregate through a weighing hopper; quantitatively adjusting the belt looseness through a sand belt tensioning adjusting subsystem; the sand-stone belt automatic cleaning subsystem is used for scraping mud, removing dirt and cleaning sundries on the belt, so that the power consumption in the running process of the belt is reduced, and the production quality of concrete is improved; prevent partial subsystem in time to carry out the position correction to the belt through the grit belt.

Description

Premixed concrete gravel belt conveying system and operation method

Technical Field

The invention relates to a belt conveying system for premixed concrete gravel and an operation method thereof, which are mainly suitable for conveying, conveying and weighing aggregate such as sand, stone and the like in a premixed concrete production plant.

Background

Concrete mixing plants have been developed with the advent of cement, and the mixing plant was originally developed in the form of a stand-alone mixer, and with the development of technology and the increasing demand for concrete, various types of mixing plants with a metering device have been developed, resulting in concrete mixing plants. The production quality and the production efficiency of the concrete are greatly improved by the ready-mixed concrete mixing plant, but the following main problems still exist in some current ready-mixed concrete mixing plants:

1) in the running process of the belt, the friction force of the support roller is large, so that the power consumption is increased, and the service life of the belt is short;

2) after the belt runs under high-load carrying for a long time, the belt gradually loses elasticity and is loosened and drooped, so that the belt is easy to slip and the transportation performance is influenced; 3) the belt is bonded with muddy impurities in the long-term use process, so that the resistance of the belt is increased, the deviation phenomenon of the belt in the running process is easy to cause material leakage, abnormal abrasion and damage of equipment, and the productivity is reduced; 4) the protective cover at the sand unloading position at the terminal point of the inclined belt is of an integral structure, the protective cover needs to be disassembled and assembled during later-stage machine maintenance at the head wheel, and the protective cover is complex to disassemble and assemble; 5) the blanking weighing precision of sand and stone is low, the vibration of a concrete mixing system is large, and the stability of the bracket is poor.

In order to solve the problems, the invention provides a simple and effective ready-mixed concrete gravel belt conveying system and an operation method thereof, which can reduce power loss in the inclined belt conveying process, prevent the belt from deviating, improve the cleanliness and the service life of the belt, increase the mechanical maintenance convenience and the operation safety of the inclined belt, improve the blanking weighing precision of sand and stone and ensure the production quality of concrete.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a ready mixed concrete gravel belt conveying system and an operation method.

The ready mixed concrete gravel belt conveying system comprises a gravel inclined belt conveying and weighing subsystem, a gravel belt tensioning and adjusting subsystem, a gravel belt automatic cleaning subsystem and a gravel belt deviation preventing subsystem;

the system comprises a system for transporting and weighing premixed concrete gravel by an inclined belt, a system for transporting and weighing premixed concrete gravel by inclined belts, and a system for transporting and weighing premixed concrete gravel by inclined belts, wherein the system comprises a multistage equipment platform, a feeding device, a tail wheel fixing device, a awning-equipped protective steel structure truss, a conveying device, an easily-detachable closed cover device, a weighing device and a batching and stirring device; the multi-stage equipment platform is formed by sequentially lifting a primary platform, a secondary platform and a tertiary platform; the feeding device comprises a feeding hopper and an impact bed, the feeding hopper is connected with the three-stage platform and the conveying device, and the impact bed is arranged at the bottom of the belt; the two ends of the conveying device are respectively connected with the tail wheel fixing device and the easily-detachable closed cover device, and the middle section of the conveying device is positioned in the steel structure truss with the canopy protection; the bottom of the easily-detachable closed cover device is opposite to the weighing device, and the outlet of the weighing device is connected with the batching and stirring device;

the sandstone belt tensioning adjustment subsystem comprises a tensioning wheel up-and-down adjusting device and a head wheel front-and-back horizontal adjusting device; a tensioning wheel moving groove is formed in the center of a steel plate with scales of the tensioning wheel up-down adjusting device and is fixed on a bearing steel plate with a awning protective steel structure truss through a tensioning wheel base; the front and rear horizontal adjusting devices of the head pulley are provided with tensioning sliding grooves, and the central shaft of the head pulley is fixed through a limiting fixing device;

the automatic sand belt cleaning subsystem comprises a mud scraper and a sweeper; the mud scraper is provided with an upper mud scraper and a lower mud scraper which are opposite, and the sweeper is provided with two opposite brushes; the mud scraper and the sweeper are sequentially arranged at the passing position of the lower part of the belt;

the sandstone belt deviation-preventing subsystem comprises a deviation-adjusting device bracket, a deviation-adjusting carrier roller and a movable steel shaft; the deviation adjusting carrier roller is connected with the movable steel shaft, and is finally installed on the bracket with the groove through the vertical steel teeth and the meshing tooth-shaped grooves which are meshed with each other and is connected with the deviation adjusting device bracket.

Preferably, the method comprises the following steps: in the conveying device, a belt is supported on a supporting rod, the supporting rod is arranged between erected steel plates by adopting a bearing structure, and a plurality of balls are arranged in the bearing structure;

the easily-detachable closed cover device is formed by assembling a plurality of steel wire meshes, a three-way joint and a rotating shaft;

the weighing device comprises an amplifying material receiving port, a primary material receiving hopper, a secondary material receiving hopper and a weighing hopper, wherein the amplifying material receiving port is opposite to the bottom of the easily-detachable closed cover; the lower part of the first-stage receiving hopper is provided with a first-stage discharging door, and the lower part of the second-stage receiving hopper is provided with a second-stage discharging door; the weighing hopper is connected with the stress sensor;

the measuring bucket feed opening of weighing device bottom is just to the aggregate sliding tray at batching agitating unit top, and the stabilizer blade of batching agitating unit bottom passes through the built-in fitting of the inside setting in second grade platform edge to be fixed.

Preferably, the method comprises the following steps: a plurality of groups of tensioning wheel up-and-down adjusting devices are arranged in the running direction of the belt, the tensioning wheels move up and down along tensioning wheel moving grooves through gears, and the edge of the steel plate with scales is provided with scale marks corresponding to the vertical height direction of the tensioning wheel moving grooves; the head wheel at the top end of the conveying device can horizontally move back and forth along the tensioning sliding groove and is fixed by the limiting and fixing device.

Preferably, the method comprises the following steps: a plurality of groups of the deviation adjusting device brackets are arranged on two longitudinal sides of the belt; the deviation adjusting carrier roller is installed on a movable steel shaft, a toothed steel ring and a rotating head are arranged at two ends of the movable steel shaft, the toothed steel ring and the movable steel shaft are connected by adopting a bearing structure, and a plurality of balls are arranged in the bearing structure; vertical steel teeth are arranged on the periphery of the toothed steel ring and are meshed with the meshing tooth-shaped grooves.

The operation method of the belt conveyor system for the premixed concrete gravel comprises the following steps:

step one, equipment installation: excavating a first-stage platform, a second-stage platform and a third-stage platform according to design requirements, pouring a concrete foundation on the edge part of the second-stage platform, and arranging embedded parts; sequentially installing each device;

step two, belt tensioning debugging: starting the belt running device, and detecting the slack degree of the belt; if the belt is loosened, slipped or deviated, the tensioning wheel is adjusted to move downwards to tighten the belt;

step three, sandstone aggregate feeding: shoveling the sandstone aggregate stacked on the third-stage platform into the feeding hopper through a forklift, so that the sandstone aggregate slides onto the belt from the lower port of the feeding hopper;

step four, transporting the sandstone aggregate: the belt rotates clockwise under the driving action of the head wheel and the tail wheel to drive the sandstone aggregate to be conveyed to the head wheel from the lower port of the feeding hopper;

step five, unloading sandstone aggregate: after the sandstone aggregate is conveyed to the head wheel, the sandstone aggregate slides to an amplifying receiving port under the action of a supporting baffle of an easily-detachable closed cover and finally enters a primary receiving hopper for temporary storage;

step six, rotating the belt to remove mud and clean: the running belt rotates after unloading and sequentially passes through the mud scraper and the sweeper;

step seven, sandstone aggregate weighing: accurately weighing and blanking the sandstone aggregate by using a primary discharge door, a secondary discharge door and a stress sensor;

step eight, stirring and producing commercial concrete: and starting a stirring system to stir the raw materials.

Preferably, in the step one: concrete surface layers are poured on the surfaces of all stages of platforms; the tail wheel fixing device, the feeding device, the steel structure truss with the awning protection, the conveying device, the tensioning wheel up-down adjusting device, the head wheel front-back horizontal adjusting device, the mud scraper, the sweeper, the easily-detachable closed cover device, the weighing device and the batching and stirring device are sequentially arranged on the secondary platform, and the belt deviation prevention system is arranged on two sides of the conveying device.

Preferably, in step four: the bottom of the belt is provided with a plurality of support rods; a plurality of groups of sandstone belt deviation-preventing subsystems are arranged on two sides of the belt, and the position of the deviation-adjusting carrier roller is adjusted by moving a rotating head at the end part of the steel shaft; when the belt deviates in the material transferring process, the edge of the belt is in contact with the deviation adjusting carrier roller, and the deviation adjusting carrier roller supports and blocks the belt to prevent the belt from further deviating.

Preferably, in step six: the belt is firstly subjected to mud scraping through a mud scraper, and sundries are cleaned through a sweeper; the clearance h between the mud scraper and the lower mud scraper in the mud scraper can be adjusted according to the thickness of the sludge on the belt, and the clearance between the upper brush and the lower brush in the sweeper can be adjusted according to the amount of sundries on the belt.

Preferably, the step seven specifically comprises: when the sandstone aggregate in the primary receiving hopper reaches a certain amount, opening a primary discharging door and a secondary discharging door to ensure that the sandstone aggregate falls into the weighing hopper roughly; when the stress sensor shows that the mass of the sandstone aggregate in the weighing hopper is close to a design value, closing the first-stage discharge door, and only opening part of the second-stage discharge door to slowly and accurately discharge; and closing the secondary discharge door when the sandstone aggregate in the weighing hopper reaches the design value.

Preferably, step eight specifically comprises: and opening a discharge hole of the weighing hopper, enabling the sandstone aggregate in the weighing hopper to slide to a feed hole assembly of the stirring system along the aggregate sliding groove, starting the stirring system to stir the raw materials after the mass ratio of the sand, the stone, the cement, the additive, the water and other raw materials in the stirring system reaches a designed value, and pouring the stirred commercial concrete into the pump truck through the concrete receiving hopper.

The invention has the beneficial effects that:

1) according to the invention, the impact bed is arranged below the inclined belt at the lower part of the feeding hopper, so that the impact of sand and stone on the inclined belt and the tail wheel during feeding is reduced, and the stability is improved.

2) According to the invention, the support rods under the inclined belt are connected with the erection steel plate by adopting a bearing structure, a plurality of balls are arranged between the support rods and the erection steel plate, the support rods can rotate freely, the rotating friction force is small, the power consumption in the running process of the belt is effectively reduced, and the transportation performance is improved.

3) The protective cover adopts an easily-detachable closed cover device and comprises a top steel wire mesh, a back steel wire mesh, a lateral steel wire mesh, a face steel wire mesh and the like, wherein the face steel wire meshes are connected through a rotating shaft, and the protective cover is convenient and quick to detach and can be used for multiple times.

4) According to the invention, the belt is tensioned by arranging a plurality of groups of tensioning wheel up-and-down adjusting devices and the head pulley front-and-back horizontal adjusting devices, so that the friction force between the belt and the head pulley roller is larger, the belt is tensioned more tightly, the belt cannot slip in the rotation process of the head pulley, and the transportation performance and the safety of the belt are effectively improved.

5) The mud scraper can scrape mud on the rotating belt in time, and the sweeper can sweep the belt in time after scraping the mud, so that the cleanness of the belt is ensured, muddy impurities are effectively prevented from being mixed into gravels, and the production quality of concrete is improved.

6) The belt deviation preventing system performs position deviation correction on the belt through the movable adjustable deviation adjusting carrier roller, prevents the belt from deviating, avoids the occurrence of material leakage and abnormal abrasion and damage of equipment, and improves the productivity.

7) The invention is provided with two stages of receiving hoppers, wherein the first stage receiving hopper is used for rough feeding, and the second stage receiving hopper is used for fine feeding, so that the weighing precision of sand and stone feeding is improved.

Drawings

FIG. 1 is an overall structural view of a ready mixed concrete gravel belt conveyor system;

FIG. 2 is a structural diagram of an inclined belt sand weighing subsystem;

FIG. 3 is a diagram of a protection structure of an inclined belt of a steel truss with a canopy;

FIG. 4 is an overall structure view of the connection between the supporting rod and the erection steel plate;

FIG. 5 is an overall structure view of the connection of the belt and the supporting roller;

FIG. 6 is a bearing structure view of the joint of the support stick and the erection steel plate;

FIG. 7 is a cross-sectional view of the belt and carrier roller connection of FIG. 5;

FIG. 8 is a view showing the connection between the removable closed type cover device and the head pulley;

FIG. 9 is an overall view of the easily detachable closed type cover;

FIG. 10 is a connection structure diagram of a back steel wire mesh and a side steel wire mesh;

FIG. 11 is a detailed view of the connection between the rotating shaft and the tee joint;

FIG. 12 is a front view of the tensioner up-down adjusting apparatus;

FIG. 13 is a detail of the configuration of the tensioner;

FIG. 14 is a detailed view of a tensioning wheel up-down adjusting device with a graduated steel plate;

FIG. 15 is an overall configuration view of the head pulley front-rear leveling device;

FIG. 16 is a detail view of the head wheel structure;

FIG. 17 is a schematic view of a head pulley and belt wrap;

FIG. 18 is a front elevation view of the central shaft of the fixed head pulley of the position-limiting fixing device;

FIG. 19 is a detail view of the central shaft of the fixed head pulley of the spacing fixing device;

FIG. 20 is a schematic view of the spacing fixture;

FIG. 21 is the overall structure diagram of the automatic cleaning subsystem for the ready mixed concrete gravel belt;

FIG. 22 is a schematic view showing the running direction of a ready mixed concrete gravel belt;

FIG. 23 is a schematic view of a ready mixed concrete gravel belt passing through a scraper and a sweeper;

FIG. 24 is a view showing a construction of a scraper mounting structure;

FIG. 25 is a view showing the construction of the mud scraper;

FIG. 26 is a view showing a construction of a sweeper mounting structure;

FIG. 27 is a schematic view of a deviation preventing system for a ready mixed concrete sand belt when a deviation adjusting carrier roller is not in contact with the belt;

FIG. 28 is a schematic view of a deviation preventing system for a ready-mixed concrete gravel belt when a deviation adjusting carrier roller contacts the belt;

FIG. 29 is a view showing the structure of the holder of the deviation correcting device and the holder with a fixing groove;

FIG. 30 is a detailed view of the belt anti-deflection subsystem;

FIG. 31 is a detail view of the connection structure of the movable steel shaft and the toothed steel ring;

FIG. 32 is a sectional view of the connection of the moving steel shaft and the toothed steel ring of FIG. 31;

fig. 33 is a detailed view of the offset idler retaining belt of the belt deviation preventing subsystem.

Description of reference numerals: 1-first-stage platform, 2-second-stage platform, 3-third-stage platform, 4-sandstone aggregate, 5-feeding hopper, 6-impact bed, 7-tail wheel support, 8-tail wheel, 9-tail wheel platform, 10-tail wheel platform support, 11-awning support, 12-flow-guiding awning, 13-belt, 14-supporting rod, 15-redirection roller, 16-head tensioning wheel, 17-easy-to-assemble closed cover, 18-head wheel, 19-amplification receiving port, 20-first-stage receiving hopper, 21-hopper rib plate, 22-second-stage receiving hopper, 23-weighing hopper, 24-ear plate, 25-stress sensor, 26-measuring hopper discharging port, 27-aggregate sliding groove, 28-stirring system feeding port assembly, 29-stirring system, 30-concrete receiving hopper, 31-pump truck, 32-bearing steel plate, 33-tensioning wheel base, 34-tensioning wheel moving groove, 35-graduated steel plate, 36-tensioning wheel, 37-large steel column, 38-receiving hopper support, 39-weighing hopper support, 40-tamping foundation, 41-bottom enlarged steel plate, 42-support leg, 43-concrete foundation, 44-anchoring steel plate, 45-embedded part, 46-primary discharging door, 47-vibrator, 48-secondary discharging door, 49-steel wire protective net, 50-pedestrian walkway, 51-erecting steel plate, 52-material blocking strip, 53-ball, 54-head wheel tensioning front and rear adjusting plate, 55-head wheel central shaft, 56-head wheel support frame, 57-adjusting plate external expansion box, 58-top layer steel wire mesh, 59-back steel wire mesh, 60-three-way joint, 61-rotating shaft, 62-lateral steel wire mesh, 63-face steel wire mesh, 64-horizontal steel tooth, 65-gear, 66-scale mark, 67-tensioning sliding groove, 68-head wheel roller, 69-sliding groove bottom plate, 70-baffle plate, 71-stay bar, 72-limiting block, 73-steel hinge shaft, 74-mud scraper, 75-fixing rod, 76-sweeper, 77-mud scraper fixing plate, 78-upper mud scraper, 79-fixing plate, 80-bolt, 81-lower mud scraper, 82-knife edge, 83-brush fixing plate, 84-brush, 85-sweeper clamping plate, 86-deviation adjusting device bracket, 87-deviation adjusting carrier roller, 88-grooved bracket, 89-meshed toothed groove, 90-rotating head, 91-connecting rod, 92-moving steel shaft, 93-toothed steel ring, 94-vertical steel tooth and 95-limiting fixing device.

Detailed Description

The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for a person skilled in the art, several modifications can be made to the invention without departing from the principle of the invention, and these modifications and modifications also fall within the protection scope of the claims of the present invention.

Example one

As an embodiment, as shown in the overall structure diagram of a premixed concrete gravel belt conveying system shown in FIG. 1, the system comprises a premixed concrete gravel inclined belt conveying and weighing system, and comprises a primary platform 1, a secondary platform 2, a tertiary platform 3, gravel aggregates 4, a feeding hopper 5, a hammock 6, a tail wheel support 7, a tail wheel 8, a tail wheel platform 9, a tail wheel platform support 10, a rain fly support 11, a diversion rain fly 12, a belt 13, a support roller 14, a redirection roller 15, a head tensioning wheel 16, an easy-to-mount closed cover 17, a head wheel 18, an enlarged receiving port 19, a primary receiving hopper 20, a hopper rib plate 21, a secondary receiving hopper 22, a weighing hopper 23, an ear plate 24, a stress sensor 25, a measuring hopper discharging port 26, an aggregate sliding groove 27, a stirring system charging port assembly 28, a stirring system 29, a concrete receiving hopper 30, a pump truck 31, a bearing steel plate 32, a tensioning wheel 36, a large steel column 37, a stress sensor 25, a stress sensor 2, a third-level platform 3, a gravel aggregates sliding groove 16, a stirring system charging port assembly 16, a stirring system, a, The system mainly comprises a multistage equipment platform, a feeding device, a tail wheel fixing device, a rain shed protective steel structure truss, a conveying device, an easily-detachable closed cover device, a weighing device, a batching and stirring device and the like.

Furthermore, the multi-stage equipment platform comprises a primary platform 1, a secondary platform 2, a tertiary platform 3, gravel aggregates 4, a rammed foundation 40 and the like, wherein the primary platform 1, the secondary platform 2 and the tertiary platform 3 are in a step type and are all formed by paving a concrete surface layer on the surface of the rammed foundation 40; gravel aggregates 4 are stacked on the third-stage platform 3; deep concrete is poured at the edge of the secondary platform 2 to form a concrete foundation 43, and an anchoring steel plate 44 is embedded in the concrete foundation 43.

Furthermore, tailwheel fixing device comprises parts such as second grade platform 2, tailwheel support 7, tailwheel 8, tailwheel platform 9, tailwheel platform support 10 is shelved on second grade platform 2, installation fixed tailwheel platform 9 on the tailwheel platform support 10, tailwheel support 7 is fixed in on tailwheel platform 9, tailwheel 8 can follow tailwheel support 7 and remove.

Further, the feeding device comprises a three-stage platform 3, gravel aggregates 4, a feeding hopper 5, an impact bed 6, a tail wheel platform 9, a belt 13 and the like, wherein a feeding opening of the feeding hopper 5 is positioned right above the belt 13, and the feeding opening and the belt are attached to each other; the bottom of a belt 13 at the right lower part of the feeding hopper 5 is provided with an impact bed 6, and the impact bed 6 is connected with a tail wheel platform 9; the high parallel and level of 3 top surfaces of port and tertiary platform of feeding hopper 5, grit aggregate 4 slides to belt 13 through feeding hopper 5 on, 13 bottom impact beds 6 of belt play the impact of buffering grit aggregate 4.

As shown in fig. 1 and 3, the inclined belt protection structure diagram with the awning protection steel structure truss comprises a secondary platform 2, awning pillars 11, a flow-guiding type awning 12, force-bearing steel plates 32, large steel columns 37, a steel wire protection net 49, a pedestrian walkway 50 and the like, wherein a plurality of backing plates are arranged on the secondary platform 2, the large steel columns 37 are vertically arranged on the backing plates, the force-bearing steel plates 32 are arranged at the tops of the large steel columns 37, the force-bearing steel plates 32 are provided with the awning pillars 11 along the longitudinal two sides, the flow-guiding type awning 12 is welded at the tops of the awning pillars 11, the steel wire protection net 49 is fixed between the adjacent awning pillars 11, and the pedestrian walkway 50 is arranged at the inner sides of the steel wire protection net 49.

As shown in fig. 3-7, the belt and carrier roller connection integral structure diagram comprises a belt 13, a carrier roller 14, a force-bearing steel plate 32, an erected steel plate 51, material blocking strips 52, balls 53 and the like, wherein the erected steel plate 51 is fixed on the force-bearing steel plate 32, the material blocking strips 52 are arranged at the top of the erected steel plate 51, the carrier roller 14 is installed between the opposite erected steel plates 51, the carrier roller 14 and the erected steel plate 51 are connected by adopting a bearing structure, a plurality of balls 53 are arranged between the two, the belt 13 is supported on the carrier roller 14, and the sand aggregate 4 on the belt is supported and blocked by the material blocking strips 52 in the conveying process, so that material running and material leakage are prevented.

As shown in fig. 1, the whole structure diagram of the ready-mixed concrete gravel belt conveying system includes a tail pulley 8, a belt 13, a carrier roller 14, a redirection roller 15, a head tensioning pulley 16, a head pulley 18, a tensioning pulley 36, and the like, wherein two ends of the belt 13 are respectively connected with the head pulley 18 and the tail pulley 8, the head tensioning pulley 16 is arranged at a certain distance behind the head pulley 18 for belt tightness adjustment, the redirection roller 15 is arranged at a certain distance behind the head tensioning pulley 16, the tensioning pulley 36 is arranged at the lower part of the redirection roller 15, and a plurality of redirection rollers 15 and a plurality of tensioning pulleys 36 are arranged at uniform intervals along the direction of the belt 13; the belt 13 circularly runs along the carrier rod 14 under the rotation action of the tail wheel 8 and the head wheel 18, and the sand aggregate 4 is transported from the tail wheel 8 to the head wheel 18 through the belt 13.

As shown in fig. 8, the connecting structure of the easily detachable closed cover device and the head pulley comprises an easily detachable closed cover 17, a head pulley 18, a front and rear head pulley tensioning adjusting plate 54, a head pulley central shaft 55, a head pulley support frame 56, an adjusting plate external expansion box 57 and the like, wherein the head pulley 18 is fixed on the head pulley central shaft 55, the head pulley central shaft 55 is embedded in the front and rear head pulley tensioning adjusting plate 54 and can move back and forth along the front and rear head pulley tensioning adjusting plate 54 (left and right directions in the drawing), the adjusting plate external expansion box 57 is arranged on the side of the front and rear head pulley tensioning adjusting plate 54, the head pulley support frame 56 is arranged on the lower portion of the adjusting plate external expansion box 57 for supporting, and the head pulley 18 is covered with the easily detachable closed cover 17.

As shown in fig. 9-11, the overall structure of the easily detachable closed hood includes a belt 13, an easily detachable closed hood 17, an adjusting plate external expansion box 57, a top steel wire mesh 58, a back steel wire mesh 59, a three-way joint 60, a rotating shaft 61, a lateral steel wire mesh 62, a face steel wire mesh 63, and the like, wherein the top steel wire mesh 58, the back steel wire mesh 59 and the lateral steel wire mesh 62 are connected through the rotating shaft 61, and the three-way joint 60 fixedly connects the rotating shafts 61 in three directions; the adjusting plate outer expanding box 57 is embedded into the lateral steel wire mesh 62, and the upper portion of the belt 13 penetrates through the face steel wire mesh 63.

As shown in fig. 1 and 2, the inclined belt sand weighing system structure comprises sand aggregate 4, a belt 13, an easily-detachable closed cover 17, an enlarged receiving port 19, a first-stage receiving hopper 20, a hopper rib plate 21, a second-stage receiving hopper 22, a weighing hopper 23, an ear plate 24, a stress sensor 25, a hopper feed port 26, a receiving hopper support 38, a weighing hopper support 39, a bottom expanded steel plate 41, a first-stage discharge door 46, a vibrator 47, a second-stage discharge door 48 and the like, the sandstone aggregate 4 is conveyed into the easy-to-assemble and disassemble closed cover 17 by the belt 13 and then slides into the amplifying receiving port 19, the amplifying material receiving port 19 is connected with a first-stage material receiving hopper 20, the first-stage material receiving hopper 20 is connected with a second-stage material receiving hopper 22, the lower part of the first-stage material receiving hopper 20 is provided with a first-stage discharge door 46, the lower parts of the second-stage material receiving hoppers 22 are provided with second-stage discharge doors 48, and the lower parts of the second-stage material receiving hoppers 22 are in butt joint with the weighing hopper 23; hopper rib plates 21 are welded on the side of the primary hopper 20, the hopper rib plates 21 are supported on a hopper support 38, lug plates 24 are welded on the side of the weighing hopper 23, the lug plates 24 are supported on a stress sensor 25, and the stress sensor 25 is placed on a hopper support 39; the bottom of the receiving hopper bracket 38 and the bottom of the weighing hopper bracket 39 are provided with bottom expanded steel plates 41, and the bottom expanded steel plates 41 are placed on the secondary platform 2; the second grade connects hopper 22 to be fixed with a plurality of vibrators 47 all around, grit aggregate 4 in the first grade connects hopper 20 is through one-level discharge door 46 thick the caving in to second grade to connect the hopper 22 in, grit aggregate 4 in the second grade connects hopper 22 is through second grade discharge door 48 essence under the effect of vibrator 47 and is blown down in weighing hopper 23, the grit aggregate 4 quality in weighing hopper 23 shows through stress transducer 25, discharges through quantity hopper feed opening 26 after it reaches the volume of design.

As shown in fig. 1, the whole structure of the ready-mixed concrete gravel belt transportation system comprises a hopper feed opening 26, an aggregate sliding groove 27, a stirring system feed opening assembly 28, a stirring system 29, a concrete receiving hopper 30, a pump truck 31, support legs 42, a concrete foundation 43, an anchoring steel plate 44, an embedded part 45 and the like, wherein the hopper feed opening 26 is in lap joint with the aggregate sliding groove 27, the aggregate sliding groove 27 is of an inclined structure, the lower part of the aggregate sliding groove is connected with the stirring system feed opening assembly 28, and the stirring system feed opening assembly 28 is formed by integrating feed openings of raw concrete materials such as sand, stone, cement, additives, water and the like; the stirring system 29 is supported by a plurality of support legs 42, the support legs 42 are welded with an anchoring steel plate 44, and the anchoring steel plate 44 is connected with an embedded part 45 through high-strength bolts; the concrete stirred by the stirring system 29 is received by a concrete receiving hopper 30 and is conveyed to a parked pump truck 31 on the primary platform 1.

As shown in fig. 1, the whole structure diagram of the ready mixed concrete gravel belt transportation system includes a belt 13, a head pulley 18, a force bearing steel plate 32, a tension pulley base 33, a tension pulley moving groove 34, a graduated steel plate 35, a tension pulley 36, etc., the gravel belt tension adjusting subsystem mainly includes two parts of a tension pulley up-down adjusting device and a head pulley front-back horizontal adjusting device, the tension pulley 36 can move up and down along the tension pulley up-down adjusting device, the tension pulley base 33 of the tension pulley up-down adjusting device is fixed on the force bearing steel plate 32, the tension pulley up-down adjusting device is provided with a plurality of groups along the belt 13, and the tightness of the belt 13 is adjusted by the plurality of groups of devices.

As shown in fig. 12 and 13, the front structure diagram of the tensioning wheel up-down adjusting device comprises a belt 13, a bearing steel plate 32, a tensioning wheel base 33, a tensioning wheel moving groove 34, a graduated steel plate 35, a tensioning wheel 36, horizontal steel teeth 64, a gear 65 and the like, wherein the graduated steel plate 35 is welded with the tensioning wheel base 33, and the tensioning wheel moving groove 34 is arranged in the center of the graduated steel plate 35; the inner wall of the tensioning wheel moving groove 34 is provided with horizontal steel teeth 64; gears 65 are arranged at two ends of the tension pulley 36, the gears 65 are meshed with the horizontal steel teeth 64 on the inner wall of the tension pulley moving groove 34, and the gears 65 can move up and down along the tension pulley moving groove 34 under the driving of electric power.

As shown in fig. 14, the detailed view of the graduated steel plate of the tensioning wheel up-down adjusting device comprises a tensioning wheel moving groove 34, a graduated steel plate 35, a tensioning wheel 36, a gear 65 and graduation lines 66, wherein the graduation lines 66 are marked on the graduated steel plate 35, and the measuring range of the graduation lines 66 is 20 cm.

As shown in fig. 15, the overall structure of the front and rear horizontal adjustment device for the head pulley comprises a head pulley 18, a front and rear tensioning adjustment plate 54 for the head pulley, a head pulley central shaft 55, a head pulley support frame 56, an adjustment plate outer expansion box 57, a tensioning sliding groove 67 and the like, wherein the head pulley 18 can horizontally move forward and backward along the front and rear horizontal adjustment device for the head pulley, the tensioning sliding groove 67 is arranged on the inner side of the front and rear tensioning adjustment plate 54 for the head pulley, and the head pulley central shaft 55 is inserted into the tensioning sliding groove 67 and can slide along the tensioning sliding groove 67; an adjusting plate outer expanding box 57 is arranged on the outer side of the adjusting plate 54 before and after the head pulley tensioning, and a head pulley supporting frame 56 is arranged on the lower portion of the adjusting plate outer expanding box 57.

As shown in fig. 16 and 17, the head pulley and belt wrapping diagram includes a belt 13, a head pulley 18, a head pulley central shaft 55, a head pulley roller 68, and the like, wherein the head pulley 18 is composed of the head pulley central shaft 55 and the head pulley roller 68, and the belt 13 is wrapped on the head pulley roller 68.

As shown in fig. 18, the front side of the head pulley central shaft fixing device is a big picture, and the head pulley central shaft fixing device comprises a head pulley tensioning front and rear adjusting plate 54, a head pulley central shaft 55, a tensioning sliding groove 67, a sliding groove bottom plate 69, a limiting fixing device 95 and the like, wherein the head pulley central shaft 55 is limited and fixed by the limiting fixing device 95 after sliding to a proper position in the tensioning sliding groove 67, and a plurality of groups of the limiting fixing devices 95 are uniformly arranged on the sliding groove bottom plate 69.

As shown in fig. 19 and 20, the limiting and fixing device fixes a head pulley central shaft in detail, which includes a head pulley central shaft 55, a sliding groove bottom plate 69, a baffle plate 70, a stay bar 71, a limiting block 72, a steel hinge shaft 73, and the like, wherein a groove is formed on the sliding groove bottom plate 69, the steel hinge shaft 73 is fixed in the groove, the baffle plate 70 is welded on the steel hinge shaft 73, and the baffle plate 70 can rotate around the steel hinge shaft 73; the back of the baffle 70 is provided with a folding stay bar 71, the end of the folding stay bar 71 is supported and limited by a limiting block 72, and the head pulley central shaft 55 slides to a proper position and then is supported and blocked by the baffle 70 to prevent the head pulley central shaft from moving back.

As shown in fig. 21-23, the whole structure of the automatic sweeping subsystem of the ready-mixed concrete gravel belt comprises a belt 13, a front and rear adjusting plate 54 for tensioning a head wheel, a head wheel central shaft 55, a head wheel roller 68, a mud scraper 74, a fixing rod 75, a sweeper 76 and the like, wherein the front and rear adjusting plate 54 for tensioning the head wheel is fixed with the head wheel roller 68, the belt 13 is wrapped on the head wheel roller 68, the upper part of the belt 13 runs in a gravel conveying direction, the lower part of the belt runs in a belt rotating direction, the fixing rod 75 is installed on the front and rear adjusting plate 54 for tensioning the head wheel, the mud scraper 74 and the sweeper 76 are installed on the fixing rod 75, the mud scraper 74 is in front, and the sweeper 76 is in back. The lower part of the belt 13 passes through the scraper 74 and the sweeper 76 in sequence in the rotation direction, the scraper 74 scrapes mud on the belt 13, and the sweeper 76 cleans sundries.

As shown in fig. 24-25, the scraper 74 mainly comprises a fixing rod 75, a scraper fixing plate 77, an upper scraper 78, a fixing piece 79, a bolt 80, a lower scraper 81, a blade 82, and the like, wherein the scraper fixing plate 77 is mounted on the fixing rod 75, the scraper fixing plate 77 has a plurality of bolt holes, the fixing pieces 79 are welded to the ends of the upper scraper 78 and the lower scraper 81, the bolt holes are formed in the fixing pieces 79, and the upper scraper 78 and the lower scraper 81 are connected to the scraper fixing plate 77 through the bolt 80; the upper scraper 78 and the lower scraper 81 both have a blade 82, and the clearance dimension h between the upper scraper 78 and the lower scraper 81 can be adjusted according to the sludge thickness of the belt 13.

As shown in fig. 26, the sweeper 76 is mainly composed of a fixing rod 75, a brush fixing plate 83, a brush 84, a sweeper clamp plate 85, and the like, wherein the sweeper clamp plate 85 is installed on the fixing rod 75, the brush fixing plate 83 is installed between two opposite sweeper clamp plates 85, the two brush fixing plates 83 are respectively installed at the upper and lower parts of the brush fixing plate 83, the brushes 84 are uniformly arranged on the brush fixing plate 83 at intervals, and the clearance distance between the upper and lower brushes 84 can be adjusted according to the sundries amount of the belt 13.

As shown in fig. 27 and 28, the ready mixed concrete sand belt deviation prevention subsystem comprises a belt 13, a deviation adjustment device bracket 86 and a deviation adjustment carrier roller 87, wherein the belt 13 is subjected to position deviation correction through the deviation adjustment carrier roller 87 in the operation process, the deviation adjustment carrier roller 87 is fixed on the deviation adjustment device bracket 86, and the deviation adjustment device bracket 86 is fixed on two longitudinal sides of the belt 13.

As shown in fig. 29, the structure of the fixed slotted bracket of the offset device bracket comprises an offset device bracket 86, a slotted bracket 88 and a meshing toothed groove 89, wherein the two slotted brackets 88 are arranged at the upper and lower parts of the offset device bracket 86, and the meshing toothed groove 89 is arranged at the middle part of the slotted bracket 88.

As shown in fig. 30 and 31, the structure of the belt deviation prevention subsystem includes a deviation adjusting carrier roller 87, a bracket 88 with grooves, a meshing tooth-shaped groove 89, a rotating head 90, a connecting rod 91, a movable steel shaft 92, a toothed steel ring 93, vertical steel teeth 94 and the like, wherein the deviation adjusting carrier roller 87 is fixed on the connecting rod 91, the connecting rod 91 is welded with the movable steel shaft 92, the toothed steel ring 93 is sleeved on each of two ends of the movable steel shaft 92, the vertical steel teeth 94 are arranged around the toothed steel ring 93, and the head of the toothed steel ring 93 is welded with the rotating head 90; toothed steel rings 93 at two ends of the movable steel shaft 92 are embedded into the meshing toothed grooves 89 of the grooved bracket 88, and the vertical steel teeth 94 are meshed with the meshing toothed grooves 89.

As shown in fig. 32, the connecting plane view of the moving steel shaft and the toothed steel ring includes balls 53, a moving steel shaft 92, a toothed steel ring 93, vertical steel teeth 94, etc., the toothed steel ring 93 and the moving steel shaft 92 are connected by a bearing structure, a plurality of balls 53 are disposed between the toothed steel ring 93 and the moving steel shaft 92, and the moving steel shaft 92 does not rotate when the toothed steel ring 93 rotates.

As shown in fig. 31 and 33, the detailed diagram of the offset roller supporting belt of the belt anti-offset subsystem includes a belt 13, an offset roller 87, an occlusion tooth-shaped groove 89, a rotating head 90, a moving steel shaft 92, a toothed steel ring 93 and the like, wherein the rotating head 90 rotates under the action of external force to push the toothed steel ring 93 to move left and right along the occlusion tooth-shaped groove 89, and the moving steel shaft 92 is driven to move left and right in the process of moving the toothed steel ring 93 left and right, so that the offset roller 87 is driven to move left and right to support and offset the belt 13.

Example two

According to the first embodiment, the invention also provides the ready mixed concrete sand belt conveying system and the operation method, which are characterized by comprising the following steps:

s1, equipment installation: excavating a first-stage platform 1, a second-stage platform 2 and a third-stage platform 3 according to design requirements, pouring concrete surface layers on the surfaces of all stages of platforms, pouring a concrete foundation 43 on the edge part of the second-stage platform 2, and arranging an embedded part 45. A tail wheel fixing device, a feeding device, a steel structure truss with a canopy protection, a conveying device, a tensioning wheel up-down adjusting device, a head wheel front-back horizontal adjusting device, a mud scraper 74, a sweeper 76, an easily-detachable closed cover device, a weighing device and a batching and stirring device are sequentially arranged on the secondary platform 2 according to the mechanical design requirements, and a belt 13 deviation prevention system is arranged on two sides of the conveying device.

S2, belt tensioning adjustment: before the sandstone aggregate 4 is fed, starting the belt running equipment, detecting the loosening degree of the belt 13, and detecting whether the belt slips or deviates, if the belt slips or slips due to loosening, adjusting the tension pulley 36 to move downwards through the tension pulley up-and-down adjusting device, so that the belt 13 is tightened.

S3, aggregate feeding of sandstone: the sandstone aggregate 4 stacked on the third-stage platform 3 is shoveled into the feeding hopper 5 through a forklift, and the sandstone aggregate 4 slides into the belt 13 from the lower port of the feeding hopper 5.

S4, carrying sandstone aggregate: the belt 13 rotates clockwise under the driving action of the head wheel 18 and the tail wheel 8, and a plurality of support rods 14 are arranged at the bottom of the belt 13 to drive the sandstone aggregates 4 to be conveyed to the head wheel 18 from the lower port of the feeding hopper 5. In the material transferring process of the belt 13, the deviation adjusting carrier rollers 87 on the two sides of the belt 13 are adjusted to proper positions, when the belt 13 deviates, the belt 13 is in contact with the deviation adjusting carrier rollers 87, and the deviation adjusting carrier rollers 87 support and block the belt 13 to prevent the belt 13 from further deviating.

S5, unloading sandstone aggregate: the sandstone aggregate 4 on the belt 13 is conveyed to the head pulley 18 and then enters the easy-to-mount and easy-to-dismount closed type cover 17, slides to the amplifying material receiving port 19 under the supporting and blocking effect of the easy-to-mount and easy-to-dismount closed type cover 17, and finally enters the primary material receiving hopper 20 for temporary storage.

S6, rotating belt mud removal and cleaning: after being discharged, the running belt 13 rotates to pass through the scraper 74 and the sweeper 76 in sequence, the scraper 74 scrapes mud on the belt 13, and the sweeper 76 cleans sundries.

S7, weighing sandstone aggregate: when the amount of the sand and stone aggregates 4 in the first-stage receiving hopper 20 reaches a certain amount, the first-stage discharging gate 46 and the second-stage discharging gate 48 are opened to enable the sand and stone aggregates 4 to be roughly dropped into the weighing hopper 23, when the mass of the sand and stone aggregates 4 in the weighing hopper 23 is close to a design value, the first-stage discharging gate 46 is closed, the second-stage discharging gate 48 only opens part of the width to slowly and accurately discharge materials, and when the sand and stone aggregates 4 in the weighing hopper 23 reach the design value, the second-stage discharging gate 48 is closed.

S8, stirring and producing commercial concrete: and opening a hopper feed opening 26, enabling the sandstone aggregate 4 in the weighing hopper 23 to slide into a stirring system feed opening assembly 28 along an aggregate sliding groove 27, starting the stirring system 29 to stir the raw materials after the mass ratio of the sand, the stone, the cement, the admixture, the water and other raw materials in the stirring system 29 reaches a designed value, and filling the stirred commercial concrete into a pump truck 31 through a concrete receiving hopper 30.

Claims (10)

1. The utility model provides a ready mixed concrete grit belt conveyor system which characterized in that includes: the sand and stone belt conveying and weighing subsystem, the sand and stone belt tensioning and adjusting subsystem, the sand and stone belt automatic cleaning subsystem and the sand and stone belt deviation preventing subsystem;

the system comprises a system for transporting and weighing premixed concrete gravel by an inclined belt, a system for transporting and weighing premixed concrete gravel by inclined belts, and a system for transporting and weighing premixed concrete gravel by inclined belts, wherein the system comprises a multistage equipment platform, a feeding device, a tail wheel fixing device, a awning-equipped protective steel structure truss, a conveying device, an easily-detachable closed cover device, a weighing device and a batching and stirring device; the multi-stage equipment platform is formed by sequentially lifting a first-stage platform (1), a second-stage platform (2) and a third-stage platform (3); the feeding device comprises a feeding hopper (5) and an impact bed (6), the feeding hopper (5) is connected with the three-stage platform (3) and the conveying device, and the impact bed (6) is arranged at the bottom of the belt (13); the two ends of the conveying device are respectively connected with the tail wheel fixing device and the easily-detachable closed cover device, and the middle section of the conveying device is positioned in the steel structure truss with the canopy protection; the bottom of the easily-detachable closed cover device is opposite to the weighing device, and the outlet of the weighing device is connected with the batching and stirring device;

the sand belt tensioning adjustment subsystem comprises a tensioning wheel up-and-down adjusting device and a head wheel front-and-back horizontal adjusting device; a tensioning wheel moving groove (34) is formed in the center of a steel plate (35) with scales of the tensioning wheel up-down adjusting device and is fixed on a bearing steel plate (32) with a awning protective steel structure truss through a tensioning wheel base (33); the front and rear horizontal adjusting device of the head pulley is provided with a tensioning sliding groove (67), and a head pulley central shaft (55) is fixed through a limiting fixing device (95);

the sand belt automatic cleaning subsystem comprises a mud scraper (74) and a cleaner (76); the mud scraper (74) is provided with an upper mud scraper (78) and a lower mud scraper (81) which are opposite, and the sweeper (76) is provided with two opposite brushes (84); the mud scraper (74) and the sweeper (76) are sequentially arranged at the passing position of the lower part of the belt (13);

the sand belt deviation prevention subsystem comprises a deviation adjusting device bracket (86), a deviation adjusting carrier roller (87) and a movable steel shaft (92); the deviation adjusting carrier roller (87) is connected with a movable steel shaft (92) and is finally installed on a grooved bracket (88) through vertical steel teeth (94) and meshing tooth-shaped grooves (89) which are meshed with each other and connected with a deviation adjusting device bracket (86).

2. The ready mixed concrete gravel belt conveyor system of claim 1, wherein: in the conveying device, a belt (13) is supported on a supporting roller (14), the supporting roller (14) is arranged between erecting steel plates (51) by adopting a bearing structure, and a plurality of balls (53) are arranged in the bearing structure;

the easily-detachable closed cover device is characterized in that an adjusting plate outer expansion box (57) is arranged at a head pulley (18), the easily-detachable closed cover device comprises an easily-detachable closed cover (17), and the easily-detachable closed cover (17) is formed by assembling a plurality of steel wire meshes, a three-way joint (60) and a rotating shaft (61);

the weighing device comprises an amplifying material receiving port (19), a first-stage material receiving hopper (20), a second-stage material receiving hopper (22) and a weighing hopper (23), and the amplifying material receiving port (19) is opposite to the bottom of the easily-detachable closed cover (17); a primary discharging door (46) is arranged at the lower part of the primary receiving hopper (20), and a secondary discharging door (48) is arranged at the lower part of the secondary receiving hopper (22); the weighing hopper (23) is connected with a stress sensor (25);

the measuring hopper feed opening (26) of weighing device bottom is just to aggregate sliding tray (27) at batching agitating unit top, and stabilizer blade (42) of batching agitating unit bottom are fixed through built-in fitting (45) of inside setting in second grade platform (2) edge.

3. The ready mixed concrete gravel belt conveyor system of claim 1, wherein: a plurality of groups of tensioning wheel up-and-down adjusting devices are arranged in the running direction of the belt (13), the tensioning wheels (36) move up and down along tensioning wheel moving grooves (34) through gears (65), and the edge of the steel plate (35) with scales is provided with scale marks (66) corresponding to the vertical height direction of the tensioning wheel moving grooves (34); the head wheel (18) at the top end of the conveying device can horizontally move back and forth along the tensioning sliding groove (67) and is fixed by a limiting fixing device (95).

4. The ready mixed concrete gravel belt conveyor system of claim 1, wherein: a plurality of groups of deviation adjusting device brackets (86) are arranged at two longitudinal sides of the belt (13); the deviation adjusting carrier roller (87) is installed on a movable steel shaft (92), a toothed steel ring (93) and a rotating head (90) are arranged at two ends of the movable steel shaft (92), the toothed steel ring (93) is connected with the movable steel shaft (92) through a bearing structure, and a plurality of balls (53) are arranged in the bearing structure; vertical steel teeth (94) are arranged on the periphery of the steel ring (93) with teeth, and the vertical steel teeth (94) are meshed with the meshed tooth-shaped grooves (89).

5. The method of operating a ready mixed concrete sand and stone belt conveyor system as claimed in claim 1 including the steps of:

step one, equipment installation: excavating a first-stage platform (1), a second-stage platform (2) and a third-stage platform (3) according to design requirements, pouring a concrete foundation (43) at the edge part of the second-stage platform (2), and arranging an embedded part (45); sequentially installing each device;

step two, tensioning and debugging the belt: starting the belt running device to detect the degree of slack of the belt (13); if the belt is loosened, slipped or deviated, the tension pulley (36) is adjusted to move downwards to tighten the belt (13);

step three, sandstone aggregate feeding: the sandstone aggregates (4) stacked on the third-stage platform (3) are shoveled into the feeding hopper (5) through a forklift, so that the sandstone aggregates (4) slide onto the belt (13) from the lower port of the feeding hopper (5);

step four, transporting the sandstone aggregate: the belt (13) rotates clockwise under the driving action of the head wheel (18) and the tail wheel (8) to drive the sandstone aggregate (4) to be conveyed to the head wheel (18) from the lower port of the feeding hopper (5);

step five, unloading sandstone aggregate: after the sandstone aggregate (4) is conveyed to the head wheel (18), the sandstone aggregate slides down to an amplifying material receiving port (19) under the supporting action of an easily-detachable closed cover (17), and finally enters a first-level material receiving hopper (20) for temporary storage;

step six, rotary belt mud removal and cleaning: the running belt (13) rotates to pass through the mud scraper (74) and the sweeper (76) in sequence after being discharged;

step seven, sandstone aggregate weighing: accurately weighing and blanking sandstone aggregates by using a first-stage discharge door (46), a second-stage discharge door (48) and a stress sensor (25);

step eight, stirring and producing commercial concrete: the stirring system (29) is started to stir the raw materials.

6. The method of operating a ready mixed concrete gravel belt conveyor system of claim 5, wherein in step one: concrete surface layers are poured on the surfaces of all stages of platforms; the tail wheel fixing device, the feeding device, the steel structure truss with the awning protection, the conveying device, the tensioning wheel up-down adjusting device, the head wheel front-back horizontal adjusting device, the mud scraper (74), the sweeper (76), the easily-detachable closed cover device, the weighing device and the batching and stirring device are sequentially arranged on the secondary platform (2), and the belt (13) deviation prevention system is arranged on two sides of the conveying device.

7. The method of operating a ready mixed concrete gravel belt conveyor system of claim 5, wherein the fourth step is: the bottom of the belt (13) is provided with a plurality of supporting rollers (14); a plurality of groups of sand belt deviation prevention subsystems are arranged on two sides of the belt (13), and the position of the deviation adjusting carrier roller (87) is adjusted through a rotating head (90) at the end part of a movable steel shaft (92); when the belt (13) deviates in the material rotating process, the edge of the belt (13) is in contact with the deviation adjusting carrier roller (87), and the deviation adjusting carrier roller (87) supports and blocks the belt (13) to prevent the belt from further deviating.

8. The method of operating a ready mixed concrete gravel belt conveyor system of claim 5, wherein in step six: the belt (13) is firstly scraped by a mud scraper (74), and sundries are cleaned by a sweeper (76); the clearance h between the mud scraper (78) and the lower mud scraper (81) in the mud scraper (74) can be adjusted according to the thickness of the mud on the belt (13), and the clearance between the upper brush (84) and the lower brush (84) in the sweeper (76) can be adjusted according to the amount of the impurities on the belt (13).

9. The method of operating a ready mixed concrete gravel belt conveyor system of claim 5, wherein step seven is specifically: when the sandstone aggregates (4) in the primary receiving hopper (20) are collected to reach a certain amount, opening a primary discharging door (46) and a secondary discharging door (48) to enable the sandstone aggregates (4) to be roughly dropped into the weighing hopper (23); when the stress sensor (25) shows that the mass of the sandstone aggregates (4) in the weighing hopper (23) is close to a design value, the first-stage discharge door (46) is closed, and the second-stage discharge door (48) is only opened to slowly and accurately discharge materials with partial width; and when the sandstone aggregate (4) in the weighing hopper (23) reaches the design value, closing the secondary discharge door (48).

10. The method of operating a ready mixed concrete gravel belt conveyor system of claim 5, wherein step eight is specifically: opening a measuring hopper feed opening (26), enabling the sandstone aggregate (4) in the weighing hopper (23) to slide into a stirring system feed opening assembly (28) along an aggregate sliding groove (27), starting the stirring system (29) to stir the raw materials after the mass ratio of the raw materials such as sand, stone, cement, an additive and water in the stirring system (29) reaches a designed value, and pouring the stirred commercial concrete into a pump truck (31) through a concrete receiving hopper (30).

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