80 results about "Segregation in concrete" patented technology

The invention discloses ultra-deep foundation pit concrete pouring equipment and a construction method thereof.The ultra-deep foundation pit concrete pouring equipment comprises a transfer hopper installed on a ring beam on the lower portion of an enclosure structure of an ultra-deep foundation pit, and the transfer hopper is connected to a pump pipe of a concrete automobile pump; one end of the material conveying hose is connected to the discharge hole of the transfer hopper; a bearing plate is formed on one side portion of a base on the enclosure structure, one end of the cantilever frame is rotatably connected to one side portion of the base, the bearing plate is supported at one end of the cantilever frame, and a locking piece is installed at one end of the cantilever frame; the driving structure comprises a plurality of electric winding drums and slings which are installed on the ring beam, the electric winding drums are connected to one ends of the slings respectively, the middles of the slings are wound around the other ends of the cantilever frames, and the other ends of the slings are connected to the middle and the other end of the conveying hose respectively. The problems that during deep foundation pit concrete pouring construction, when a concrete pump truck is adopted for pouring, the free falling height of concrete is large, and concrete segregation is likely to happen are solved.

The invention discloses a vibrating production device for concrete prefabricated part machining, and relates to the technical field of concrete prefabricated parts, the vibrating production device comprises a vibrating mechanism and translation sliding blocks mounted on the two sides of the bottom of the vibrating mechanism, a formwork fixing mechanism is arranged at the bottom of the vibrating mechanism, and clamping sliding plates are arranged on the two sides of the formwork fixing mechanism; the vibrating mechanism comprises a vibrating sliding disc, a longitudinal threaded sleeve is fixedly installed on the top of the vibrating sliding disc, electric telescopic rods are fixedly installed on the periphery of the bottom of the vibrating sliding disc, a supporting chassis is fixedly installed at the bottoms of the electric telescopic rods, and connecting ropes are fixedly installed on the periphery of the bottom of the supporting chassis. When the lifting frequency of the light foam disc and the detection rod is reduced, it shows that bubbles in the concrete are discharged, at the moment, the vibrating rod can be pulled out for concrete vibrating in other areas, and the situation that the quality of the formed concrete is affected due to concrete segregation caused by excessive concrete vibrating is avoided.

The invention provides a quick-response concrete segregation treatment agent, and belongs to the technical field of building materials. Comprising the following components: an acrylic acid-acrylamide-N-vinyl pyrrolidone copolymer, betaine modified sodium alginate and calcined phosphogypsum. The efficient performance is achieved through the multi-component synergistic effect and process innovation. The core component acrylic acid-acrylamide-N-vinyl pyrrolidone copolymer adsorbs free water through carboxylic acid groups, acylamino is complexed with the water reducing agent, a spatial network is formed in combination with the salt resistance of NVP, and fluidity and segregation resistance balance are optimized; glycine betaine modified sodium alginate enhances cement adsorption and a calcium cross-linked network through zwitterions in an alkaline environment, so that moisture is quickly fixed; pores in the concrete are filled with the calcined phosphogypsum, and migration channels of free water are reduced; and finally, the effect of quickly responding to segregation is realized.

The invention discloses an anti-radiation aggregate, a preparation method thereof and high-strength anti-crack anti-radiation concrete, and belongs to the technical field of concrete. Comprising the following steps: S1, uniformly mixing lead powder, iron ore powder and barium cement, adding hydrogen peroxide and water, granulating, curing and heating at high temperature to obtain an aggregate core; s2, soaking the aggregate core in a mixed solution of sodium alginate and boron fibers, and then spraying the aggregate core with a calcium chloride aqueous solution to obtain aggregate particles; and S3, uniformly mixing red mud and graphite powder, calcining at 800-900 DEG C, grinding, sieving, uniformly mixing with an alkaline activator, adding water to obtain slurry, mixing the slurry with aggregate particles, and molding to obtain the composite material. The anti-radiation aggregate disclosed by the invention can attenuate radiation energy in a gradient manner, and has excellent speed reduction, weakening and absorption effects on radiation rays. Meanwhile, the anti-radiation aggregate disclosed by the invention has the characteristics of relatively small apparent density and high strength, concrete segregation and layering can be avoided, and the working and mechanical properties of the concrete are improved.

According to the large-area concrete underwater bottom sealing platform construction method, by optimizing a pouring device and a construction process, the construction cost is remarkably reduced, the efficiency is improved, the problems of concrete segregation and water backflow are effectively avoided, and the construction efficiency is improved. According to the underwater bottom sealing device, the consistency and reliability of the bottom sealing quality are ensured, accurate pouring can be achieved in a complex environment through a flexible moving and positioning system, the engineering safety is greatly improved, the construction progress is greatly accelerated, and the problem that in the underwater bottom sealing process, water flows back into a grouting pipe, and consequently first sealing fails is solved.

The invention discloses a top-down pipe-jacking well wall-hanging sliding type concrete pouring device and a construction method thereof, and the device comprises an annular guide rail which is detachably installed on the inner wall of a previous pipe section of a jacking pipe; the flow guide plate is obliquely arranged, a first rolling wheel abutting against the inner wall is installed at the lower end of the flow guide plate, a supporting rod is connected to the upper end of the flow guide plate, the end, away from the flow guide plate, of the supporting rod is arranged on the annular guide rail in a sliding mode, and a feeding gap is formed between the lower end of the flow guide plate and the inner wall; the feeding gap is aligned to a top pouring opening of the next pipe section; and the side baffles are formed on the two opposite sides of the flow guide plate correspondingly, and the side baffles and the upper surface of the flow guide plate are enclosed to form a discharging channel. The method solves the problem that concrete segregation is easily caused by adopting a long chute in a traditional construction method in concrete pouring of a pipe-jacking well wall structure constructed by a reverse construction method.

The invention discloses an anti-segregation construction device and method for a high and large wallboard with dense upper opening steel bars. The device comprises pouring pipes pre-buried in a wall body and a distributor used for distributing concrete to the pouring pipes. The upper end of the pouring pipe extends to the position close to the position below an upper opening steel bar, branch pipes are distributed along the line at intervals, turning covers are arranged at pipe openings of the branch pipes, and the turning covers plug the pipe openings at the beginning, are pushed outwards when the inner side concrete pressure reaches a certain degree and reset to plug the pipe openings when bearing the outer side concrete pressure. Wing plates are additionally arranged on the two sides of the pouring pipe along the vertical seam position to serve as water stop plates; the distributor comprises a collecting cavity, an inlet pipe is arranged on the upper portion of the collecting cavity, outlet pipes corresponding to the pouring pipes are distributed on the lower portion of the collecting cavity, and conveying mechanisms are arranged in the outlet pipes. According to the device, vertical continuous and uniform pouring of the high and large wall plate with dense upper opening steel bars can be achieved, and many problems caused by layered pouring and concrete disintegration caused by too large concrete height difference are avoided.

The invention discloses a rammed and expanded pile structure. The structure comprises the following steps: leveling the site and positioning the lines before construction, digging out the pile hole and the expanded head, placing the crushed stone layer, and performing preliminary tamping. The outer cylinder is placed, and a cone formed by a plurality of outer expansion plates is inserted into the crushed stone layer to a designed depth, so that the inner cylinder resists the outer expansion plates, the outer expansion plates are further opened, and the surrounding crushed stone layer is rammed and expanded in a horizontal direction. The inner cylinder is taken out, and the concrete cushion layer is poured in the outer cylinder. The precast pile is placed in the pile hole, embedded in the crushed stone layer, and connected with the concrete cushion layer. The cast-in-place concrete layer is then poured in layers into the outer cylinder. The outer cylinder is lifted while pouring, and vibrated to improve the connectivity between the precast pile and the bottom expanded head and the side soil layer, thereby avoiding the concrete segregation of the core bearing part and affecting the bearing strength of the pile.

The utility model discloses a concrete conveying pipeline capable of preventing segregation, and relates to the technical field of concrete transportation. The concrete conveying pipeline capable of preventing segregation comprises a pipe body, the pipe body is laid on the ground through a damping support, the pipe body comprises an inner pipe and an outer pipe, the inner pipe is embedded in the outer pipe, positioning plates are installed between the inner pipe and the outer pipe in a supporting mode, and liquid bins are formed between the adjacent positioning plates. The surface of the pipe body is further wrapped with a pipe sleeve, and the pipe sleeve is fixed through a damping support. In order to overcome the defect that concrete is prone to segregation due to environmental influence when conveyed by a pipeline, hot water or cooling liquid can be added into the liquid bin according to the environmental temperature, the proper temperature of the concrete in the pipeline is kept, and the problem of concrete segregation caused by high temperature or low temperature is avoided.

The utility model discloses large-flow concrete segregation rate test equipment, which comprises a rack, a sieve shaker and a jumping table, the rack comprises a base, a sliding trolley and a lead screw lifting mechanism, the sieve shaker and the jumping table are respectively arranged on the base, the sliding trolley is arranged in a track of the base, the lead screw lifting mechanism is arranged on the sliding trolley, a clamping mechanism is arranged on the lead screw lifting mechanism, and the jumping table is arranged on the clamping mechanism. The jumping table is provided with a detection cylinder, the detection cylinder comprises a plurality of stacked cylinder bodies, the clamping mechanism is used for clamping the cylinder bodies, the cylinder bodies are provided with driving devices and turning plate assemblies, the turning plate assemblies are located in the cylinder bodies, the driving devices are located outside the cylinder bodies, and the driving devices are connected with the turning plate assemblies. When a concrete sample is screened, each section of the cylinder body of the detection cylinder can be automatically closed by virtue of the turning plate assembly, so that the screw rod lifting mechanism can conveniently move the cylinder body to the vibration screening machine through the clamping mechanism, and in the process, the turning plate assembly can prevent the concrete sample from leaking from the cylinder body.

The invention relates to the technical field of concrete construction, and discloses a pouring construction method for a pipe jacking construction working well, which comprises a bottom plate, a motor is arranged in the middle of the upper surface of the bottom plate, a threaded rod is fixedly arranged at the output end of the motor, and a plurality of fixing rods are in threaded connection with the bottom end of the outer wall of the threaded rod. A scraping block is arranged at one end of the fixing rod, a first spring is arranged on the upper surface of the fixing rod, a buffer block is arranged at the top end of the first spring, a rotating shaft is arranged at one end of the buffer block, and supporting blocks are rotationally connected to the two ends of the rotating shaft. Concrete segregation is avoided through cooperation of the buffer blocks and the springs, and the pouring quality and structural strength of the working well are improved; after pouring, the motor drives the scraping block to clean the groove dividing barrel, manual cleaning difficulty is lowered, and the service life of the device is prolonged; and a stable structure and a buffering and cleaning mechanism reduce potential safety hazards and guarantee the safety of personnel and equipment. The problems of concrete segregation and difficult device cleaning are solved.

A discharging pipeline unit and a wellhead mixing station concrete discharging system comprise a plurality of connecting pipes in butt joint, and further comprise a collecting hopper, an elbow and a hose, the collecting hopper is installed at the upper end of the connecting pipe located at the uppermost end, the elbow is installed at the lower end of the connecting pipe located at the lowermost end, and the hose is in butt joint with the elbow; and at least one connecting pipe is provided with a bending part. The bending part is arranged on the connecting pipe, and the elbow is arranged at the lower end of the connecting pipe at the lowermost end, so that the falling resistance of concrete is increased, the falling speed of the concrete is slowed down, and concrete segregation caused by free falling of the concrete in the longitudinal connecting pipe can be prevented.

The invention discloses an anti-segregation device for a discharge port of an airport pavement concrete mixing station in an alpine plateau region, and relates to the technical field of concrete.The anti-segregation device is characterized in that a spiral discharge rod is rotationally connected into a conveying cylinder, an opening is formed in the side wall of one end of the conveying cylinder and communicated with a communicating bin, and a discharge port is formed in the side wall of the other end of the conveying cylinder and provided with a discharge vibration frame; the discharging vibration frame is connected with the conveying cylinder through a vibration assembly, a partition is arranged on the discharging vibration frame, a heat preservation layer is arranged on the outer side of the conveying cylinder, and heating wires are arranged in the heat preservation layer on the outer side of the conveying cylinder and the partition. Concrete can be stirred to a certain degree through rotation of a spiral discharging rod, the probability of segregation is reduced, heating wires are arranged in a heat preservation layer and a partition on the outer side of a conveying cylinder, the temperature of the concrete can be increased, the influence of plateau cold and cold on concrete segregation is avoided, a discharging vibration frame is arranged at a discharging port, and the discharging vibration frame is connected through a vibration assembly and vibrates, so that the concrete segregation probability is reduced. The aggregate is mixed with water, so that the possibility of segregation is reduced.

The invention provides a mid-partition wall pouring method, which belongs to the technical field of tunnel construction, and comprises the following steps of: binding reinforcing steel bars and positioning a trolley: taking a concrete pouring beam reserved at a vault position during secondary lining construction as a reference to assist in positioning a trolley template, and binding and lapping the reinforcing steel bars entering a site according to design requirements; erecting a trolley template; the pump pipe is connected to the pouring window at the rearmost end of the first layer, when the liquid level of the concrete rises to 250-300 mm away from the current pouring window, pouring is paused, the pump pipe is switched to the previous pouring window of the current pouring window of the same layer, and pouring continues; after the pouring window is switched every time, the just-completed pouring area is vibrated immediately, the window is closed, and first-layer pouring is completed; the process is repeated to complete layered pouring in sequence; and sealing and pouring the top. The problems that in the pouring process, concrete disintegration and bleeding are likely to occur, cold joints and bubbles are difficult to discharge, and trolley positioning is difficult during secondary lining construction can be solved.

The invention discloses a belt conveyor tunnel narrow-body dense-rib high-body wall double-pipe anti-segregation pouring device and method.The belt conveyor tunnel narrow-body dense-rib high-body wall double-pipe anti-segregation pouring device comprises a double-pipe sectional type material distribution module, an equal-distance pre-buried type guide module, a flow control module and an anti-disturbance auxiliary assembly, and a material distribution pipe of the double-pipe sectional type material distribution module is formed by detachably connecting a plurality of pipe sections; a casing pipe of the equidistant pre-embedded guide module provides an underneath passing channel for the material distribution pipe, the flow control module can independently adjust the concrete flow of the material distribution pipe, and the anti-disturbance auxiliary assembly limits transverse swing of the material distribution pipe. The technical effects that concrete segregation is effectively prevented, the pouring quality and efficiency are improved, and construction safety and convenience are ensured are achieved.

The present application relates to concrete conveying technical field, especially to a kind of concrete self-slip conveying slow descending device design method, comprising: obtaining the real coarse aggregate sample of concrete to be conveyed and concrete mix proportion;Numerical modeling: the physical modeling of different types of slow descending device is carried out to obtain slow descending device numerical model;Based on the real coarse aggregate sample, construct coarse aggregate numerical model;Parameter calibration: the contact mechanics characteristic parameters between coarse aggregate, mortar particle and steel pipe wall are calibrated using physical experiment and numerical simulation combined calibration method;Slow descending device design: based on the contact mechanics characteristic parameters obtained by calibration and actual construction demand, the type of slow descending device is selected, and the parameters of slow descending device are determined, and the design of slow descending device is completed.The present application determines the best slow descending device type of concrete to be conveyed by comparing and analyzing the efficiency difference of different types of slow descending device, so as to adapt to the concrete conveying operation of hundred-meter high-fall condition, effectively control the balance of concrete segregation and pipe wall wear.

This utility model relates to an anti-segregation device for concrete pouring of foundation beam pile heads in highway engineering. The device comprises reinforcing bars I and II, inclined steel plates, and retaining steel plates I, II, and III. The inclined steel plates form a 45-degree angle with the horizontal plane, and their lower edges are arc-shaped discharge ports. The side of the inclined steel plate opposite the arc-shaped discharge port is connected to the bottom of retaining steel plate III along its width direction. The inclined steel plates are connected to the bottoms of retaining steel plates I and II along their length direction. One end of retaining steel plate III is connected to retaining steel plate I, and the other end is connected to retaining steel plate II. The edges of the arc-shaped discharge port are welded to reinforcing bars I and II one-to-one, and these reinforcing bars I and II are connected to the lower edges of the inclined steel plates at a 135-degree angle. This utility model has a simple composition, is easy to install, saves time and labor, and can prevent concrete segregation during foundation beam pile head pouring, ensuring the quality of foundation beam concrete pouring.

The utility model provides a device for slope concrete paving, including upper plane and lower plane, it is inclined panel between upper plane and lower plane, is equipped with the material collecting box, two first winches and two second winches on the upper plane, is equipped with the material removal car on one side of material collecting box, is equipped with the hopper on material collecting box, is equipped with the sliding paver on inclined panel, is equipped with the second receiving hopper of intercommunication in paver both ends. The whole structure transports concrete through the material removal car, can avoid the phenomenon of concrete segregation and chute blockage caused by chute transportation, also avoid the phenomenon of increasing equipment maintenance cost caused by the need of regular replacement or repair due to long -term use chute wear and deformation, have greater popularization value.

The application discloses an anti-segregation agent, a preparation method and application, and relates to the technical field of concrete admixtures. The anti-segregation agent comprises a dispersing agent, a thickening agent and a preservative. The dispersing agent comprises a copolymer obtained by reacting monomers under the action of an initiator. The monomers comprise unsaturated carboxylic acid monomers and first monomers. The first monomers comprise at least one of sulfonic acid monomers, organic silicon monomers, aromatic monomers and phosphate ester monomers. The anti-segregation agent has a wider adaptation range for concrete aggregates, a larger upper and lower limit range for the segregation state of concrete, a stronger adjustment capacity for concrete mixtures, a more flexible adding and using mode, and a lower production cost.

The utility model discloses a concrete anti-segregation humping device which comprises an anti-segregation mechanism, a plurality of supporting mechanisms, a discharging mechanism and an auxiliary discharging mechanism, the supporting mechanisms are arranged at different heights of a well wall, the anti-segregation mechanism is connected with the supporting mechanisms, the discharging mechanism is arranged at the bottom of the anti-segregation mechanism, and the auxiliary discharging mechanism is arranged at the bottom of the anti-segregation mechanism. The auxiliary discharging mechanism is connected with the discharging mechanism, the anti-segregation mechanism comprises hoppers, first pipelines and blocking structures, the number of the hoppers is the same as that of the supporting mechanisms, each hopper is connected with the supporting mechanisms, the blocking structures are arranged in each hopper, every two adjacent hoppers are connected through the corresponding first pipeline, and an included angle is formed between each first pipeline and the vertical direction. The blocking structures are arranged in the hoppers, the two adjacent hoppers are connected through the inclined first pipelines, the blocking structures are matched with the inclined first pipelines, large stones in concrete are filtered, the flow speed of the concrete is reduced, the impact force of the stones is reduced, and the purposes of prolonging the service life of the humping device and preventing the concrete from being disintegrated are achieved.

The invention discloses assembly type concrete structure convenient filling equipment, and belongs to the field of concrete filling. Crawler systems are symmetrically arranged at the bottom of the transfer bin; a feeding hole is formed in the top end of the transfer bin; a mounting opening is formed in the bottom wall of the transfer bin, a supporting plate is rotationally embedded in the mounting opening, discharging openings penetrating through the supporting plate are uniformly formed in the supporting plate, the discharging openings are obliquely formed, and a driving mechanism used for driving the supporting plate to rotate is arranged in the transfer bin; due to the fact that the multiple discharging openings are evenly formed in the surface of the supporting plate, the output power of the cement pump truck can be improved, the speed of inputting concrete into the transfer bin can be increased, large-area simultaneous filling can be achieved under the action of the discharging openings, the paving efficiency is improved, the moving frequency of the transfer bin is reduced, and the filling time is shortened; and the probability of concrete disintegration is reduced, the effect of improving efficiency is achieved, and in the rotating process of the supporting plate, horizontal power can be provided for concrete discharged out of the discharging opening.

This invention relates to a flexible tremie pipe for preventing segregation in concrete pouring, comprising at least two vertically connected tremie pipe units. Each tremie pipe unit includes a pipe body and a flange. The pipe body is a funnel-shaped structure made of flexible rubber material, with a circular upper cross-section and a flattened lower section. The inner walls on opposite sides are fitted together. The top opening has an outwardly folded annular flange of a certain width. The flange includes an upper flange and a lower flange. The upper flange presses against the top surface of the flange on the pipe body, and the lower flange fits onto the pipe body and is close to the bottom surface of the flange. The upper and lower flanges are connected by bolts, clamping and fixing the flange. The flanges of the upper and lower tremie pipe units are connected by rigging or a lifting rod. This invention allows concrete to flow in a constrained state, preventing segregation.

The invention belongs to the technical field of concrete vibrating equipment, particularly relates to a vibrating device for iron tailing concrete, and aims to solve the problem that an existing vibrating device for the iron tailing concrete cannot effectively control the vibrating quality. The lower bracket is located below the upper staddle, four symmetrical supporting rods are fixedly connected to the side, opposite to the lower bracket, of the upper staddle, and a plurality of symmetrical hoisting frames are fixedly connected to the upper side of the upper staddle. According to the vibrating device for the iron tailing concrete disclosed by the invention, the uniformity of the vibration amplitude of the vibrating rod head in the concrete can be monitored when the vibrating rod head vibrates the concrete, and the vibrating rod head is pulled out from the concrete when the vibration amplitude is uniform, so that the uncertainty of manual operation is effectively avoided; concrete segregation caused by excessive vibration or concrete honeycombs and pitted surfaces caused by insufficient vibration are avoided, the forming quality of the concrete is guaranteed, and the building quality is improved.

The invention provides a steel pipe column self-compacting concrete guide pipe pouring method, and belongs to the technical field of building construction.The steel pipe column self-compacting concrete guide pipe pouring method comprises the steps that the concrete performance requirement and the mixing proportion are determined, and high fluidity needs to be achieved; casting by a guide pipe method: installing a guide pipe at the top of the steel pipe column to ensure uniform distribution of concrete; segmented pouring and vibrating are conducted, specifically, the super-long steel pipe column is segmented, and after each segment is poured, vibrating is conducted through a vibrating rod and a mallet; the method comprises the following steps of: preparing concrete, controlling and detecting the quality, monitoring the performance indexes of the concrete in real time, detecting the compactness by using a knocking method and an ultrasonic method and remedying, and solving the problems of concrete segregation, difficulty in vibrating and difficulty in guaranteeing the compactness in the prior art by reasonably designing the mix proportion, pouring a guide pipe, vibrating in sections and strictly controlling the quality. And the pouring quality and performance of the steel pipe column are improved.

The utility model belongs to the technical field of building construction, and particularly relates to a high formwork frame column limb type liftable guide pipe which comprises a first fixing frame, an electric hoist and two guide pipe bodies, and the electric hoist is fixedly installed on the top of the inner wall of the first fixing frame. The two fixing blocks are fixedly connected to the exteriors of the two catheter main bodies in a sleeving mode correspondingly; the connecting assembly is arranged outside the two catheter main bodies and is used for connecting the two catheter main bodies; and the four moving assemblies are arranged on the two sides of the two fixing blocks correspondingly and used for driving the eight connecting plates to move, through the arranged structure, spatial movement and modular splicing of the guide pipe body can be achieved, meanwhile, it is ensured that the guide pipe body is accurately centered and stabilized in the high-formwork frame column, and the guide pipe body can be conveniently assembled and disassembled. The problems of concrete segregation, impact damage and the like caused by shaking and deviation of a traditional guide pipe body are solved, and then workers can use the guide pipe conveniently.

The application provides a concrete water-retaining agent containing cycloaromatic amide and a preparation method and application thereof, raw materials are as follows: 70-80 parts of ethylene glycol monovinyl polyoxyethylene ether (EPEG), 4-6 parts of cycloaromatic amide, 400-500 parts of water, 50-60 parts of acrylic acid, 9-10 parts of acrylamide, 2-2.5 parts of oxidizing agent, 0.3-0.5 parts of chain transfer agent, 0.4-0.6 parts of reducing agent and 0.3-0.6 parts of catalyst. Compared with the prior art, the application synthesizes a polycarboxylic acid type concrete water-retaining agent containing cycloaromatic amide through an aqueous phase free radical polymerization reaction at normal temperature, the synthesis process is simple and easy to operate, the concrete segregation and bleeding problems can be solved, the workability of concrete can be improved, and the concrete slump and spread degree over time and early and late strength can be improved.

The invention discloses a parameter determination method for preventing high-speed concrete from segregation, comprising inputting slurry density, aggregate density, average density, aggregate particle size, particle ball equivalent diameter, volume concentration, slurry viscosity, and chute inner diameter in concrete, establishing a calculation relationship between relative speed, slurry chute speed, and aggregate chute speed, inputting a relative speed corresponding to a segregation judgment standard, solving the relationship, inputting the chute speed, and judging the size, if yes, outputting that the concrete chute speed will not segregate; if no, outputting that the concrete chute speed will segregate, and re-judging after correcting the chute speed; the invention can effectively avoid the phenomenon of segregation by inputting relevant parameters of concrete including but not limited to aggregate density, slurry density, concrete density, aggregate particle size, volume concentration, chute inner diameter, and obtaining an optimal chute speed by calculation.

The invention discloses a concrete conveying system for a large-gradient long inclined shaft. The concrete conveying system comprises a ground concrete transport vehicle, a discharging device, an enamel chute, a transfer storage box, horizontal spiral concrete conveying equipment, an in-hole concrete transport vehicle and a control unit. The enamel chute is of a sectional structure and is composed of a plurality of hinged sections, and locking spherical hinges are arranged between the hinged sections and used for adapting to working conditions of different gradients. The lower end of the enamel chute is connected with the transfer storage box and connected with a feeding port of the horizontal spiral concrete conveying equipment, at least two material level detectors are arranged on the top of the transfer storage box in the length direction, and after detection signals are processed by the control unit, the variable frequency of the spiral conveying equipment is adjusted in real time. And the material level in the material storage box is maintained in a preset height interval of 1-1.6 m. The inclined shaft concrete conveying device can achieve efficient and stable conveying of inclined shaft concrete and has the advantages of being high in structural adaptability, continuous and uniform in feeding and capable of preventing concrete segregation and blockage.

The application relates to the technical field of composite thermal insulation formwork construction, and discloses a concrete pouring device based on composite thermal insulation formwork construction, which comprises a pouring mechanism and a material conveying pipe mechanism. The material conveying pipe mechanism comprises a material conveying inner pipe and an outer protective pipe, the outer protective pipe is fixedly installed outside the material conveying inner pipe, a cavity for injecting air is arranged between the material conveying inner pipe and the outer protective pipe, and a rubber hose is fixedly connected to the top end of the material conveying inner pipe. When the piston rod is pushed outwards, one end of the piston rod pushes the deceleration plate to overturn upwards, so that the deceleration plate is in a horizontal state. When more air is injected, the inclination angle of the deceleration plate tends to be horizontal, the contact area of the concrete and the deceleration plate is increased, the concrete falling on the deceleration plate is difficult to slide downwards quickly, and therefore the flow rate of the concrete is reduced to the maximum extent, and the segregation of the concrete is avoided.

This invention relates to a concrete placing system for pole production, comprising a gantry crane and a mixing plant, a conveying pipe, and a casting mold for composite poles. The composite pole is composed of a fiberglass skeleton and concrete. The system also includes a fixed plate, a placing cylinder, a buffer pipe, a rotating cylinder, a first movable plate, a second movable plate, a mixing component, and an arc-shaped plate. When the motor drives the rotating rod and ultimately rotates the rotating cylinder, the first and second mixing plates, through a connecting rod and rotation shaft design, not only perform circular motion but also reciprocate at small angles, with the gap between them changing. This causes the width of the flow channel between the mixing plates to constantly change, completely breaking the fixed flow field inside the concrete, effectively preventing concrete segregation, maintaining its workability and uniformity, and ensuring that the concrete is in optimal condition before casting, thereby significantly improving the overall mechanical properties and structural homogeneity of the final pole product.