Concrete stirring device for building construction

Abstract

The invention relates to the technical field of building equipment, and discloses a concrete stirring device for building construction, the concrete stirring device comprises a storage tank, a main stirring assembly and an aggregate storage bin, the storage tank and the aggregate storage bin are respectively communicated with the main stirring assembly, the main stirring assembly comprises a main stirring frame, the main stirring frame comprises a main stirring module, and the main stirring module is connected with the aggregate storage bin. The main stirring module comprises a stirring and mixing box and a stirring mechanism, a control chamber is arranged on the side face of the main stirring frame, the main stirring module further comprises an inclined belt conveyor, and the aggregate storage bin communicates with the main stirring assembly through the inclined belt conveyor; aggregate in the aggregate storage bin is conveyed into the main stirring module through the inclined belt conveyor, powder in the storage tank is conveyed into the main stirring module, and then the powder and the aggregate are mixed and stirred through the main stirring assembly.

Description

Technical Field

[0001] The invention relates to the technical field of construction equipment, in particular to a concrete mixing device for construction. Background Art

[0002] Concrete is a commonly used building material. Concrete is formed by mixing sand, cement, gravel and water. Concrete mixing is achieved by a mixer. At a construction site, our mixing actions for concrete include material transportation, material feeding and mixer preparation. During mixing, materials need to be transported to the mixer manually and mixed by putting the materials into the mixer, which is time-consuming and labor-intensive. At the same time, the materials need to be screened and weighed. The existing screening device is prone to sieve blockage. In addition, the existing concrete mixing station has problems such as a long installation cycle for each component and a low degree of integration. The installation process of the concrete mixer of the concrete mixing station is time-consuming, high energy consumption and a greater impact on the environment. It is difficult to recultivate the land after the operation is completed. Finally, the main agitator of the existing concrete mixing station often has uneven mixing during the mixing process, causing the materials to be partially uneven in the mixer and accumulate near the inner wall of the concrete mixer, increasing the mixing energy consumption while reducing the mixing efficiency. Summary of the invention

[0003] The object of the present invention is to provide a concrete mixing device for construction that achieves continuity and accuracy in preparing nutrient solution through a pure water component, a raw material box component, a mixing reactor and a product storage tank that are interconnected, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above purpose, a concrete mixing device for construction is provided, comprising a storage tank, a main mixing assembly and an aggregate storage bin, wherein the storage tank and the aggregate storage bin are respectively connected to the main mixing assembly, and characterized in that: further, the main mixing assembly comprises a main mixing frame, the main mixing frame comprises a main mixing module, the main mixing module comprises a mixing box and a mixing mechanism, a control room is provided on the side of the main mixing frame, and also comprises an inclined belt conveyor, which connects the aggregate storage bin with the main mixing assembly.

[0005] Furthermore, the aggregate storage bin includes a material box shell, which is funnel-shaped, with a support rod at the bottom end of the material box shell, and spaced partitions inside the material box shell. It also includes a screening component, a storage hopper at the lower end of the screening component, and an aggregate weighing hopper. The aggregate weighing hopper is arranged below the storage hopper, between the support rods, and a horizontal conveying belt is provided at the top of the aggregate weighing hopper close to the end of the support rod and at the lower end of the aggregate weighing hopper.

[0006] Furthermore, the screening component includes a material baffle, the cross-section of the material baffle is trapezoidal, the material baffle is arranged at the bottom end of the material box shell, the width of the material baffle is smaller than the distance between the two partitions, and the cavity between the material baffle and the partition constitutes an aggregate outlet, and also includes an aggregate temporary storage box, which is arranged at the lower end of the aggregate outlet, and the cross-section of the aggregate temporary storage box is trapezoidal, and also includes a screening cylinder, the screening cylinder is cylindrical, a through hole connected to the screening cylinder is opened on one side of the aggregate temporary storage box, a swivel joint is provided at the through hole, the screening cylinder and the swivel joint are coaxial and rotatably matched, an annular permanent magnet array is provided on the outer side of the screening cylinder and near both ends, and also includes a driving motor and a rotating shaft, the output end of the driving motor is matched with the rotating shaft pin, the rotating shaft passes through the aggregate temporary storage box and extends to the end of the screening cylinder away from the driving motor, and spiral blades arranged at equal intervals along the spiral line are provided on the outside of the rotating shaft, so that the spiral blades, the rotating shaft and the screening cylinder are combined to form a screw conveyor.

[0007] Furthermore, the screening component also includes an aggregate splash guard plate, which is U-shaped, and a weighing box is provided at the lower end of the aggregate splash guard plate, the weighing box includes two symmetrically arranged weighing side plates, the weighing side plates are arranged at the lower end of the aggregate splash guard plate, and also includes a weighing end plate, the weighing end plates are arranged at both ends of the weighing side plates, and also includes a weighing base plate, there are two weighing base plates and they are hinged to the weighing side plates; it also includes load-bearing wheels, there are two groups of load-bearing wheels and they are symmetrically arranged, each group of load-bearing wheels is connected by a connecting rod, the connecting rod is connected to the support rod, an electromagnet that cooperates with the permanent magnet array is provided on the outer side of the load-bearing wheel, and also includes support legs, the support legs extend downward to the weighing side plates, the support legs are symmetrically arranged along the load-bearing wheels, an electric telescopic rod is provided between the support legs, one end of the electric telescopic rod is connected to the weighing base plate, a distance sensor is provided on the outer side of the support leg, and a constant pressure telescopic support rod is provided on the lower side of the weighing side plate.

[0008] Furthermore, the screening component also includes a main gas pipeline, which is arranged in the wall of the screening cylinder along the central axis. There are multiple main gas pipelines and they are arranged at equal intervals along the circumferential direction of the inner wall of the screening cylinder. The main gas pipeline is connected to the rotary joint and also includes a jet pipeline. The jet pipeline connects the main gas pipeline with the outside world. A high-pressure and high-speed jet nozzle is provided at the air outlet of the jet pipeline. The center line of the jet pipeline is perpendicular to the center line of the screening cylinder, and the angle between the jet pipeline and the inner wall of the screening cylinder is 30-60 degrees; it also includes a cleaning blade, which is hinged to the spiral blade through a torsion spring, one side of the cleaning blade is in the shape of a spiral curved surface and matches the shape of the spiral blade, and the cleaning blade cooperates with the high-pressure and high-speed jet nozzle provided at the jet pipeline.

[0009] Furthermore, the main mixing frame includes a lower support rod, a lower bearing plate is provided at the top of the lower support rod, a middle support rod extending upward is provided at the four corners of the top of the lower bearing plate, a middle bearing plate is provided at the top of the middle support rod, an upper support rod extending upward is provided at the four corners of the top of the middle bearing plate, an upper top cover is provided at the top of the upper support rod, a fence connected to the upper top cover is provided at the top of the middle bearing plate, a cement hopper connected to the storage tank is provided at the top of the middle bearing plate, an aggregate hopper connected to the inclined belt conveyor is provided, and a water pump is also provided; the mixing box and mixing mechanism of the main mixing module are arranged at the top of the lower bearing plate, a concrete premixing box is provided at the top of the mixing box, the upper end of the concrete premixing box is connected to the water pump, the aggregate hopper and the cement hopper, and the lower end of the concrete premixing box is connected to the mixing mechanism.

[0010] Furthermore, the concrete premixing box includes a premixing box shell, which is cylindrical, and the upper end of the premixing box shell is connected to the aggregate feeding hopper and the cement feeding hopper, and also includes a water adding pipe, one end of the water adding pipe is connected to the water adding pump, and also includes a rotating pipe, the rotating pipe is connected to the water adding pipe, the rotating pipe includes an upper rotating pipe and a lower rotating pipe, and the rotating pipe is coaxially arranged with the premixing box shell; it also includes an upper rotating hub, the upper rotating hub is conical, the upper rotating hub is coaxial with the upper rotating pipe, a plurality of spiral mixing blades are arranged on the outer side of the upper rotating hub, and also includes a lower rotating hub, the lower rotating hub is connected to the upper rotating hub The hubs are arranged symmetrically along the contact surface, a plurality of spiral stirring blades are provided on the outer side surface of the lower rotating hub, a plurality of water spray pipes are opened on the side end of the spiral stirring blades away from the rotating tube, the water spray pipes are connected to the rotating tube, and the spiral stirring blades on the outer side surface of the upper rotating hub are in opposite spiral directions to the spiral stirring blades on the outer side surface of the lower rotating hub; it also includes a premixing motor, a motor cover is provided on the outer side of the premixing motor, a coaxial inverter is provided at the output end of the premixing motor, the first output end of the coaxial inverter is engaged with the upper rotating tube, and the second output end of the coaxial inverter is engaged with the lower rotating tube.

[0011] Furthermore, the stirring and mixing box includes a mixing box shell, which is cylindrical, and a driven gear is provided on the outside of the mixing box shell, and an upper sliding jacket and a lower sliding jacket are provided at the upper and lower ends of the mixing box shell respectively, and also includes an upper cover and a lower cover, the upper cover is arranged at the top of the upper sliding jacket, and the lower cover is arranged at the bottom of the lower sliding jacket, and a through hole connecting the inside and the outside is opened at the top of the upper cover, and a mixing box feed pipe connected to the concrete premix box is provided at the through hole; it also includes a scraper, the interior of the scraper is hollow, the scraper is arranged between the upper sliding jacket and the lower sliding jacket and is tightly fitted with the inner wall of the mixing box shell, and also includes a fixed plate, the interior of the fixed plate is hollow and connected to the scraper.

[0012] Furthermore, the scraper includes an outer side surface, the curvature radius of the mixing box shell is smaller than the curvature radius of the outer side surface, and also includes a front side curved surface, the front side curved surface is in the shape of an arc surface, and also includes a rear side curved surface, a plurality of cleaning nozzles are provided on the rear side curved surface, and also includes an outward turning surface; the stirring mechanism includes a mixing and stirring motor, a differential is provided at the output end of the mixing and stirring motor, the upper output shaft and the lower output shaft of the differential are coaxial, a driving gear is provided on the outer side of the lower output shaft away from the upper output shaft end, the driving gear is meshed with the driven gear, and also includes a mixing and stirring shaft, the mixing and stirring shaft is connected to the upper output shaft through a set transmission belt, a plurality of mixing and stirring blades are provided on the outer side of the mixing and stirring shaft, the mixing and stirring blades are arranged along a spiral line around the mixing and stirring shaft, holes are provided on the mixing and stirring blades, and also includes a gas-liquid feed pipe, and the fixed plate is connected to the gas-liquid feed pipe through a rotary joint.

[0013] Furthermore, the scraper includes a plurality of auxiliary scrapers, the auxiliary scrapers are plow-shaped, and the auxiliary scrapers are arranged in multiples and at equal intervals along the axis of the mixing box shell; the stirring mechanism also includes a spiral conveying blade, which is arranged between the scraper and the mixing and stirring blade.

[0014] The present invention has the following beneficial effects over the prior art: 1. The present invention cooperates with the main gas pipeline and the jet pipeline arranged in the cylinder wall of the screening cylinder, so that the high-pressure and high-speed jet nozzle installed at the jet pipeline sprays high-speed gas to impact the cleaning blades, which pushes the screening cylinder to rotate in the opposite direction under the action of the spring, and at the same time makes the cleaning blades rotate around the hinge shaft. The cleaning blades rebound under the action of the torsion spring. Since the high-pressure and high-speed jet nozzle adopts a pulsed jet mode, and the rotation direction of the rotating shaft and the screening cylinder is opposite, when the cleaning blades rebound back to the drying mesh holes of the screening cylinder, the screening cylinder has rotated a certain angle, so that the cleaning blades can slap and clean the aggregate stuck in the adjacent drying mesh holes.

[0015] 2. The mixing motor drives the differential to work, and then drives the upper output shaft and the lower output shaft to work, thereby driving the mixing box shell and the mixing shaft to rotate. Since the scraper is fixed between the upper sliding jacket and the lower sliding jacket and fits tightly with the mixing box shell, the mixing shaft drives the installed mixing blades to rotate, so that the concrete on the inner wall of the mixing box shell is scraped to the vicinity of the mixing blades by the scraper, and then the concrete on the inner wall of the mixing box shell is fully mixed with the concrete at the center position by the mixing blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a concrete mixing device of the present invention; Figure 2 This is a schematic diagram of the overall structure of the aggregate storage bin of the present invention; Figure 3 It is an axonometric view of the aggregate storage bin of the present invention; Figure 4 A top view of the aggregate storage bin of the present invention; Figure 5 For the present invention Figure 4 AA schematic diagram; Figure 6 Axonometric view of the screening cylinder of the present invention; Figure 7 This is a front view of the screening tube of the present invention; Figure 8 For the present invention Figure 7 BB schematic diagram; Fig. 9 For the present invention Figure 8 A local enlarged schematic diagram of point A; Fig.10 A schematic diagram of a cleaning blade of the present invention; Fig.11 This is a schematic diagram of the main stirring assembly of the present invention; Fig.12 It is a schematic diagram of the aggregate feeding hopper of the present invention; Fig.13 This is a schematic diagram of a concrete premix box of the present invention; Fig.14 This is a schematic diagram of the spiral stirring blade of the present invention; Fig.15 For the present invention Fig.14 sectional view of Fig.16 This is an axonometric diagram of the stirring and mixing box of the present invention; Fig.17 A top view of the stirring and mixing box of the present invention; Fig.18 For the present invention Fig.17 Schematic diagram of CC; Fig.19 This is a schematic diagram of the frame structure of the stirring and mixing box of the present invention; Fig. 20 It is a schematic diagram of the scraper of the present invention; Fig.21 The figure is a schematic diagram of a scraper structure according to another embodiment of the present invention.

[0017] In the figure: 1. Aggregate storage bin; 101. Material box shell; 102. Partition; 103. Screening assembly; 104. Storage hopper; 105. Support rod; 106. Aggregate weighing hopper; 107. Driving motor; 108. Aggregate temporary storage box; 109. Aggregate splash plate; 110. Weighing box; 111. Support leg; 112. Loading wheel; 113. Screening cylinder; 114. Rotating shaft; 115. Material baffle; 116. Spiral blade; 117. Aggregate outlet; 118. Permanent magnet array; 119. Electric telescopic rod; 120. Weighing bottom plate; 121. Electromagnet; 122. Jet pipe; 123. Main gas pipeline; 124, cleaning blade; 3, inclined belt conveyor; 4, main mixing assembly; 401, main mixing frame; 402, main mixing module; 403, mixing and mixing box; 404, mixing mechanism; 405, concrete premixing box; 406, water pump; 407, aggregate hopper; 408, cement hopper; 409, water pipe; 410, spiral mixing blade; 411, premixing box shell; 412, premixing motor; 413, lower rotating hub; 414, upper rotating hub; 415, rotating tube; 416, mixing and mixing motor; 417, differential; 418, driving gear; 419 , driven gear; 420, mixing box housing; 421, upper cover; 422, upper output shaft; 423, lower output shaft; 424, mixing shaft; 425, transmission belt; 426, mixing box feed pipe; 427, mixing blades; 428, gas-liquid feed pipe; 429, scraper; 430, fixed plate; 431, lower cover; 432, discharge port; 433, upper sliding jacket; 434, lower sliding jacket; 435, outer side surface; 436, front side curved surface; 437, outward turning surface; 438, rear side curved surface; 439, auxiliary scraper; 5, control room; 6, storage tank. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] In one embodiment, if Figure 1 As shown, a concrete mixing device for construction includes a storage tank 6, a main mixing component 4 and an aggregate storage bin 1, the storage tank 6 and the aggregate storage bin 1 are respectively connected to the main mixing component 4, the main mixing component 4 includes a main mixing frame 401, the main mixing frame 401 includes a main mixing module 402, the main mixing module 402 includes a mixing box 403 and a mixing mechanism 404, a control room 5 is provided on the side of the main mixing frame 401, and also includes an inclined belt conveyor 3, which connects the aggregate storage bin 1 with the main mixing component 4.

[0020] In this embodiment, the powder and ingredients are respectively sent from different storage tanks 6 into the main mixing assembly 4 by a screw conveyor, and then the aggregate in the aggregate storage bin 1 is sent into the main mixing assembly 4 by the horizontal conveying belt 2 and the inclined belt conveyor 3, so that the aggregate, powder and ingredients are mixed in the main mixing assembly 4, and then water is added to the main mixing assembly 4 by a water pump and the aggregate and powder are stirred and mixed, thereby achieving the purpose of concrete mixing. At the same time, the aggregate storage bin 1, the horizontal conveying belt 2, the inclined belt conveyor 3, the main mixing assembly 4 and the control room 5 are all modularly designed, that is, the aggregate storage bin 1, the horizontal conveying belt 2, the inclined belt conveyor 3, the main mixing assembly 4 and the control room 5 can all work independently, so that the aggregate storage bin 1, the horizontal conveying belt 2, the inclined belt conveyor 3, the main mixing assembly 4 and the control room 5 are easy to move and combine, and can be combined according to the actual environment, reducing the floor space, reducing the investment cost, and facilitating land reclamation.

[0021] In one embodiment, if Figure 2-11 As shown, Figure 2 As shown, the aggregate storage bin 1 includes a material box shell 101, which is funnel-shaped, and a support rod 105 is provided at the bottom end of the material box shell 101, and spaced partitions 102 are provided inside the material box shell 101. It also includes a screening component 103, and a storage hopper 104 is provided at the lower end of the screening component 103. It also includes an aggregate weighing hopper 106, which is arranged below the storage hopper 104, between the support rods 105, and at the top of the aggregate weighing hopper 106 close to the end of the support rod 105.

[0022] In this embodiment, the hopper is composed of a material box shell 101 and a partition 102, that is, each hopper is composed of a group of symmetrically arranged material box shells 101 and partitions 102, and a plurality of hoppers are provided with support rods 105 at their lower ends, that is, a plurality of hoppers are arranged in a row and fixedly connected by the support rods 105, and the aggregate passes through the screening component 103 and falls into the aggregate weighing hopper 106 for weighing, thereby completing the aggregate screening and weighing operations.

[0023] During operation, the aggregates in the aggregate storage bin 1 are screened by the screening component 103 and the aggregates that meet the standards are sent to the aggregate weighing bucket 106 for weighing. After the weighing operation is completed, the aggregates are sent to the horizontal conveyor belt 2 set at its lower end, and then sent to the inclined belt conveyor 3 by the horizontal conveyor belt 2. Finally, the weighed aggregates are sent to the main mixing component 4 through the inclined belt conveyor 3 for mixing.

[0024] Specifically, Figure 3-5As shown, the screening assembly 103 includes a material baffle 115, the cross section of which is trapezoidal, and the material baffle 115 is arranged at the bottom end of the material box shell 101. The width of the material baffle 115 is less than the distance between the two partitions 102. The cavity between the material baffle 115 and the partition 102 constitutes an aggregate outlet 117. It also includes an aggregate temporary storage box 108, which is arranged at the lower end of the aggregate outlet 117. The cross section of the aggregate temporary storage box 108 is trapezoidal, and it also includes a screening cylinder 113. The screening cylinder 113 is cylindrical, and a through hole communicating with the screening cylinder 113 is opened on one side of the aggregate temporary storage box 108. A swivel joint is provided at the through hole, the screening drum 113 is coaxial with the swivel joint and rotates in cooperation, an annular permanent magnet array 118 is provided on the outer side of the screening drum 113 and near both ends, and also includes a drive motor 107 and a rotating shaft 114, the output end of the drive motor 107 is pin-matched with the rotating shaft 114, the rotating shaft 114 passes through the aggregate temporary storage box 108 and extends to the end of the screening drum 113 away from the drive motor 107, and spiral blades 116 are arranged at equal intervals along the spiral line on the outside of the rotating shaft 114, so that the spiral blades 116, the rotating shaft 114 and the screening drum 113 are combined to form a screw conveyor.

[0025] In this embodiment, the aggregate temporary storage box 108 is installed at the lower end of the hopper formed by the material box shell 101 and the partition 102, so that the aggregate is buffered when entering the screening assembly 103 from the hopper, and then the rotating shaft 114 is driven to rotate by the driving motor 107, and then the spiral blade 116 is driven to rotate by the rotating shaft 114. The spiral blade 116 pushes the aggregate in the aggregate temporary storage box 108 into the screening drum 113 of the screening assembly 103 during the rotation process. Since a swivel joint is provided at the end of the aggregate temporary storage box 108 away from the driving motor 107, and the screening drum 113 is coaxial and connected with the swivel joint, The screening drum 113 can rotate around the central axis of the swivel joint, so that the aggregates obtain centrifugal force in the screening drum 113, so that the aggregates that can pass through the screening drum 113 fall into the aggregate weighing hopper 106 below, and the aggregates that cannot pass through the screening drum 113 are sent out of the screening drum 113 under the action of the spiral blade 116, recycled, crushed again, and sent back to the hopper, so that the spiral blade 116, the rotating shaft 114 and the screening drum 113 are combined to form a screw conveyor and also serve as the core component of the screening assembly 103, so that the screening assembly 103 can also send the aggregates out of the screening drum 113 when screening the aggregates; During operation, since the cross-section of the material baffle 115 is trapezoidal, the aggregates enter the aggregate temporary storage box 108 along the aggregate outlet 117 under the action of gravity for temporary storage. Then the driving motor 107 is started and drives the spiral blade 116 to rotate, thereby moving the aggregates from the aggregate temporary storage box 108 into the screening cylinder 113. The screening cylinder 113 rotates around the center line of the swivel joint, so that the aggregates that meet the standards are thrown out of the screening cylinder 113 and fall into the aggregate weighing bucket 106, and the aggregates that do not meet the standards are sent out of the screening cylinder 113 through the spiral blade 116.

[0026] Further, such as Figure 3-5 As shown, the screening assembly 103 also includes an aggregate splash plate 109, which is U-shaped. A weighing box 110 is provided at the lower end of the aggregate splash plate 109. The weighing box 110 includes two symmetrically arranged weighing side plates, which are arranged at the lower end of the aggregate splash plate 109, and also includes weighing end plates, which are arranged at both ends of the weighing side plates, and also includes weighing bottom plates 120, which have two weighing bottom plates 120 and are hinged to the weighing side plates; and also includes load-bearing wheels 112, which have two groups and are symmetrically arranged, and each group of load-bearing wheels 112 is connected by a connecting rod. The connecting rod is connected to the support rod 105, and an electromagnet 121 cooperating with the permanent magnet array 118 is provided on the outer side of the load-bearing wheel 112. It also includes a support leg 111, which extends downward to the weighing side plate. The support legs 111 are symmetrically arranged along the load-bearing wheel 112, and an electric telescopic rod 119 is provided between the support legs 111. One end of the electric telescopic rod 119 is connected to the weighing bottom plate 120. A distance sensor is provided on the outer side of the support leg 111 for measuring the distance between the load-bearing wheel 112 and the screening drum 113. A constant pressure telescopic support rod is provided on the lower side of the weighing side plate.

[0027] In this embodiment, in order to support the screening drum 113, an annular permanent magnet array 118 is provided on the outer side of the screening drum 113 and near both ends, two sets of bearing wheels 112 are symmetrically arranged below the screening drum 113, and an electromagnet 121 cooperating with the permanent magnet array 118 is provided on the outer side of the bearing wheel 112, that is, the electromagnetic field generated by the electromagnet 121 of the bearing wheel 112 interacts with the magnetic field generated by the permanent magnet array 118 outside the screening drum 113, so that the screening drum 113 is kept magnetically suspended. The floating state reduces the friction loss and facilitates the rotation of the screening drum 113 around its own axis under a smaller torque. At the same time, each set of load-bearing wheels 112 is connected by a connecting rod, and the connecting rod is connected to the support rod 105. A constant pressure telescopic support rod is provided on the lower side of the weighing side plate, so that the load-bearing wheels 112 do not move up and down with the weighing box 110. At the same time, the support legs 111 adopt a telescopic structure and a weighing sensor is installed inside, so that the aggregate weighing bucket 106 is composed of the weighing box 110, the support legs 111 and the load-bearing wheels 112.

[0028] During operation, in the initial state, that is, when there is no aggregate in the weighing box 110 and the screening drum 113 is full of aggregate, the constant pressure telescopic support rod lifts the weighing box 110 to the highest point. At this time, the weighing side plate of the weighing box 110 is in pressure-free contact with the aggregate splash plate 109. At this time, the electromagnet 121 of the load-bearing wheel 112 is energized, and the magnetic field generated by the electromagnet 121 repels the magnetic field of the permanent magnet array 118 on the outside of the screening drum 113. The repulsion of the magnetic field provides a support force for the screening drum 113 to maintain its horizontal state. Preferably, the load-bearing wheel 112 can be a power wheel; Aggregates fall into the weighing box 110 through the sieve holes of the screening cylinder 113, and are prevented from being thrown out of the weighing box 110 by the aggregate splash plate 109. As the amount of aggregate in the weighing box 110 increases, the weight of the weighing box 110 increases, causing the weighing box 110 to move downward. When the weighing box 110 moves downward, the constant-pressure telescopic support rod is compressed. The supporting force provided by the constant-pressure telescopic support rod during the shortening process is always the same as that in the initial state. Since the load-bearing wheel 112 is fixedly connected to the support rod 105 through a connecting rod, the support leg 111 is extended, and the weight of the aggregate in the weighing box 110 is measured by a weighing sensor, so that the support leg 111 provides limited fixed support for the load-bearing wheel 112 while weighing the aggregate in the weighing box 110; when the aggregate in the weighing box 110 reaches the set weight, the electric telescopic rod 119 is extended, and the weighing base plate 120 is unfolded so that the aggregate in the weighing box 110 falls into the upper end of the horizontal conveyor belt 2.

[0029] Further, such as Figure 6-10 As shown, the screening component 103 also includes a main gas pipeline 123, which is arranged in the wall of the screening cylinder 113 and along the central axis direction. There are multiple main gas pipelines 123 and they are arranged at equal intervals along the circumferential direction of the inner wall surface of the screening cylinder 113. The main gas pipeline 123 is connected to the rotary joint, and also includes a jet pipeline 122, which connects the main gas pipeline 123 with the outside. A high-pressure and high-speed jet nozzle is provided at the gas outlet of the jet pipeline 122. The center line of the jet pipeline 122 is perpendicular to the center line of the screening cylinder 113, and the angle between the jet pipeline 122 and the inner wall surface of the screening cylinder 113 is 30-60 degrees; and also includes a cleaning blade 124, which is hinged to the spiral blade 116 through a torsion spring, and one side of the cleaning blade 124 is in the shape of a spiral curved surface and matches the shape of the spiral blade 116, and the cleaning blade 124 cooperates with the high-pressure and high-speed jet nozzle provided at the jet pipeline 122.

[0030] In the present embodiment, in order to prevent aggregate from clogging the screening cylinder 113, a cleaning blade 124 is hinged on the outer side of the spiral blade 116. At the same time, the cleaning blade 124 is hinged to the spiral blade 116 through a torsion spring. In order to deflect the cleaning blade 124, a plurality of main gas pipelines 123 are provided in the wall of the screening cylinder 113 and along the central axis direction. A jet pipeline 122 is also provided. One end of the jet pipeline 122 is connected to the main gas pipeline 123, and the other end of the jet pipeline 122 is provided on the wall of the drying mesh hole. At the same time, the included angle between the jet pipeline 122 and the inner wall surface of the screening cylinder 113 is 30-60 degrees. Preferably, the included angle between the jet pipeline 122 and the inner wall surface of the screening cylinder 113 is 45 or 50 degrees, that is, the opening of the jet pipeline 122 faces the spiral blade 116. At the same time, a high-pressure and high-speed jet nozzle is provided at the air outlet of the jet pipeline 122, and the high-pressure and high-speed jet nozzle adopts a pulse jet mode.

[0031] During operation, the external high-pressure air pump is connected to the rotary joint, and the external high-pressure air pump is connected to the main air pipeline 123 through the rotary joint. There are multiple main air pipelines 123, and only the multiple main air pipelines 123 far away from the load-bearing wheel 112 are connected to the external high-pressure air pump. The number of main air pipelines 123 connected to the external high-pressure air pump does not exceed 5. At this time, the high-pressure and high-speed air nozzle on the side wall of the drying mesh hole far away from the load-bearing wheel 112 blows air toward the cleaning blade 124 of the spiral blade 116. The cleaning blade 124 rotates around the hinge shaft after being affected by the strong wind. At the same time, because the high-pressure and high-speed air nozzle adopts a pulsed jet mode, after the cleaning blade 124 rotates a certain angle The high-pressure and high-speed air nozzle stops working. At the same time, the reaction force of the high-pressure and high-speed air nozzle during the air jet can provide a torque for the screening drum 113 to rotate around the central axis, so that the screening drum 113 can rotate at a certain speed and the rotation direction is opposite to the rotation direction of the rotating shaft 114, so that the aggregate in the screening drum 113 is subjected to centrifugal force when the screening drum 113 rotates, so that the aggregate is easily separated from the screening drum 113. At the same time, the rotating shaft 114 and the screening drum 113 continue to rotate in the opposite direction at a certain angle, so that the cleaning blade 124 rebounds and resets under the action of the torsion spring and slaps the adjacent aggregate stuck in the screen mesh hole, forcing the aggregate to be discharged from the drying mesh hole; Finally, if the aggregate is large and blocks the sieve holes so that the high-pressure and high-speed air nozzle cannot impact the cleaning blades 124, in actual operation, the aggregate can only fill the lower half of the screening cylinder 113, and the upper half is a cavity. When the spiral blade 116 enters the aggregate from the cavity, the cleaning blade 124 will be deflected until it is rotated out of the aggregate pile and then restored to its original state under the action of the torsion spring. When the cleaning blade 124 is rotated out of the aggregate, it rebounds to the sieve holes of the screening cylinder 113. If there is stuck aggregate, it will be pushed out of the sieve holes or rotated under the action of the cleaning blade 124. The above actions are repeated many times until the aggregate in the drying mesh holes is pushed out. The blocked aggregate can also be impacted multiple times by the high-pressure and high-speed air nozzle, so that the aggregate is flipped in the drying mesh holes until the aggregate in the drying mesh holes is pushed out.

[0032] In one embodiment, if Figure 11-12 As shown, the main mixing frame 401 includes a lower support rod, a lower bearing plate is provided at the top of the lower support rod, a middle support rod extending upward is provided at the four corners of the top of the lower bearing plate, a middle bearing plate is provided at the top of the middle support rod, an upper support rod extending upward is provided at the four corners of the top of the middle bearing plate, an upper top cover is provided at the top of the upper support rod, a fence connected to the upper top cover is provided at the top of the middle bearing plate, a cement feeding hopper 408 connected to the storage tank 6 is provided at the top of the middle bearing plate, an aggregate feeding hopper 407 connected to the inclined belt conveyor 3 is provided, and also includes a water pump 406; the mixing box 403 and the mixing mechanism 404 of the main mixing module 402 are arranged at the top of the lower bearing plate, and a concrete premixing box 405 is provided at the top of the mixing box 403, the upper end of the concrete premixing box 405 is connected to the water pump 406, the aggregate feeding hopper 407 and the cement feeding hopper 408, and the lower end of the concrete premixing box 405 is connected to the mixing mechanism 404.

[0033] In this embodiment, the aggregate is transported from the aggregate storage bin 1 to the aggregate feeding hopper 407 by the inclined belt conveyor 3, and then the powder in the storage tank 6 is sent to the cement feeding hopper 408 by the screw conveyor, and then the water is pumped to the main mixing module 402 by the water pump 406, and finally the aggregate, powder and water are sent to the concrete premixing box 405 for premixing.

[0034] Further, such as Figure 13-15As shown, the concrete premixing box 405 includes a premixing box shell 411, which is cylindrical, and the upper end of the premixing box shell 411 is connected to the aggregate feeding hopper 407 and the cement feeding hopper 408, and also includes a water adding pipe 409, one end of the water adding pipe 409 is connected to the water adding pump 406, and also includes a rotating pipe 415, the rotating pipe 415 is connected to the water adding pipe 409, and the rotating pipe 415 includes an upper rotating pipe and a lower rotating pipe, and the rotating pipe 415 is coaxially arranged with the premixing box shell 411; it also includes an upper rotating hub 414, the upper rotating hub 414 is conical, the upper rotating hub 414 is coaxial with the upper rotating pipe, and a plurality of spiral mixing blades 410 are provided on the outer side of the upper rotating hub 414, and also includes a lower rotating hub 415. Hub 413, the lower hub 413 and the upper hub 414 are symmetrically arranged along the contact surface, a plurality of spiral stirring blades 410 are arranged on the outer side of the lower hub 413, a plurality of water spray pipes are opened on the side end of the spiral stirring blades 410 away from the rotating tube 415, the water spray pipes are connected to the rotating tube 415, the spiral stirring blades 410 on the outer side of the upper hub 414 are opposite to the spiral stirring blades 410 on the outer side of the lower hub 413; it also includes a premixing motor 412, a motor cover is arranged on the outer side of the premixing motor 412, and a coaxial inverter is arranged at the output end of the premixing motor 412, the first output end of the coaxial inverter is engaged with the upper rotating tube, and the second output end of the coaxial inverter is engaged with the lower rotating tube.

[0035] In this embodiment, the upper hub 414 and the lower hub 413 are rotated in opposite directions by a coaxial inverter, so that the concrete is fully mixed. At the same time, the rotating tube 415 is hollow and connected to the water adding tube 409. At the same time, the water spraying pipe opened on the outer side of the spiral stirring blade 410 is connected to the rotating tube 415, so that the spiral stirring blade 410 can add water to the concrete through the water spraying pipe while stirring the concrete. Finally, since the direction of the water spraying pipe is tangent to the spiral stirring blade 410, the water spraying pipe pushes the spiral stirring blade 410 to rotate while adding water to the concrete, thereby reducing the output power of the premixing motor 412 and saving energy.

[0036] During operation, raw materials are fed into the premixing box shell 411 through the aggregate feeding hopper 407 and the cement feeding hopper 408, and then water is passed through the water pump 406, and then fed into the rotating tube 415 through the water feeding pipe 409, and then the coaxial inverter is driven to work by the premixing motor 412, and the coaxial inverter drives the upper rotating tube and the lower rotating tube of the rotating tube 415 to rotate in the clockwise or counterclockwise direction respectively, so that the upper rotating hub 414 and the lower rotating hub 413 rotate in opposite directions to achieve full mixing of the concrete, and then water is fed into the rotating tube 415 through the water feeding pipe 409 and sprayed out through the water spraying pipe arranged on the outer side of the spiral stirring blade 410. The spiral stirring blade 410 sprays water to the concrete during the mixing process. At the same time, the direction of the water spraying pipe is tangent to the direction of the spiral stirring blade 410, so that the spiral stirring blade 410 is pushed to rotate while spraying water to the concrete, thereby reducing the output power of the premixing motor 412 and reducing energy consumption.

[0037] In one embodiment, if Figure 16-20 As shown, the mixing box 403 includes a mixing box shell 420, which is cylindrical, and a driven gear 419 is provided on the outside of the mixing box shell 420, and an upper sliding jacket 433 and a lower sliding jacket 434 are provided at the upper and lower ends of the mixing box shell 420, respectively, and also includes an upper cover 421 and a lower cover 431, the upper cover 421 is provided at the top end of the upper sliding jacket 433, and the lower cover 431 is provided at the bottom end of the lower sliding jacket 434, A discharge port 432 is provided at the top of the upper cover 421, and a through hole communicating with the inside and outside is opened, and a mixing box feed pipe 426 communicating with the concrete premixing box 405 is provided at the through hole; it also includes a scraper 429, the scraper 429 is hollow inside, the scraper 429 is arranged between the upper sliding jacket 433 and the lower sliding jacket 434 and is tightly fitted with the inner wall of the mixing box shell 420, and also includes a fixing plate 430, the fixing plate 430 is hollow inside and is communicated with the scraper 429.

[0038] The scraper 429 includes an outer side surface 435, the curvature radius of the mixing box shell 420 is smaller than the curvature radius of the outer side surface 435, and also includes a front side curved surface 436, the front side curved surface 436 is an arc surface, and also includes a rear side curved surface 438, a plurality of cleaning nozzles are provided on the side of the rear side curved surface 438, and also includes an outer turning surface 437; the stirring mechanism 404 includes a mixing and stirring motor 416, and a differential 417 is provided at the output end of the mixing and stirring motor 416, and the upper output shaft 422 and the lower output shaft 423 of the differential 417 are coaxial, and the outer side of the lower output shaft 423 is provided with a plurality of cleaning nozzles. A driving gear 418 is provided on the side away from the end of the upper output shaft 422, and the driving gear 418 is meshed with a driven gear 419. It also includes a mixing shaft 424, which is connected to the upper output shaft 422 through a transmission belt 425. A plurality of mixing blades 427 are provided on the outer side of the mixing shaft 424. The mixing blades 427 are arranged along a spiral line around the mixing shaft 424, and holes are provided on the mixing blades 427. It also includes a gas-liquid feed pipe 428, and the fixed plate 430 is connected to the gas-liquid feed pipe 428 through a rotary joint.

[0039] In this embodiment, the concrete premixed by the concrete premixing box 405 enters the mixing box housing 420 through the mixing box feeding pipe 426, and then the mixing motor 416 works and drives the lower output shaft 423 to work through the differential 417, and the lower output shaft 423 drives the driving gear 418 to work. Since the driving gear 418 is meshed with the driven gear 419, the driven gear 419 rotates under the action of the driving gear 418, and since the driven gear 419 is fixed to the mixing box housing 420, the mixing box housing 420 rotates following the driven gear 419. At the same time, the scraper 429 is arranged between the upper sliding jacket 433 and the lower sliding jacket 434 and is closely fitted with the inner wall surface of the mixing box shell 420, so that when the mixing box shell 420 rotates, the scraper 429 rotates relative to the mixing box shell 420, so as to achieve the purpose of cleaning the concrete attached to the inner wall surface of the mixing box shell 420 through the scraper 429. Since the scraper 429 includes an outer side surface 435, the curvature radius of the mixing box shell 420 is smaller than the curvature radius of the outer side surface 435. The front curved surface 436 is in the shape of an arc, the rear curved surface 438 is also included, and the outer turning surface 437 is also included. The outer turning surface 437 connects the front curved surface 436 and the rear curved surface 438. Since the scraper 429 is fixedly connected with the upper sliding jacket 433 and the lower sliding jacket 434, the purpose of turning the concrete on the inner wall of the mixing box shell 420 toward the mixing and stirring shaft 424 is achieved to prevent the concrete from accumulating on the inner wall of the mixing box shell 420. At the same time, the scraper 429 is hollow inside, and a plurality of cleaning nozzles are provided on the side of the rear curved surface 438. The mixing and stirring shaft 424 also includes a gas-liquid feed pipe 428 and a fixed plate 430. The fixed plate 430 is hollow inside and communicates with the scraper 429. The fixed plate 430 is communicated with the gas-liquid feed pipe 428 through a rotary joint. The fixed plate 430 is provided at the lower end of the upper cover 421, so that the gas-liquid mixture enters the fixed plate 430 from the gas-liquid feed pipe 428, and then enters the scraper 429 along the fixed plate 430. The concrete on the inner wall of the mixing box shell 420 is scraped by the scraper 429 to the vicinity of the mixing and stirring shaft 424, and at the same time, a plurality of cleaning nozzles are provided on the rear curved surface 438 of the scraper 429 to clean the inner wall of the mixing box shell 420. While the cleaning nozzle is cleaning the inner wall of the mixing box shell 420, part of the torque generated by the reaction force is used to offset the torque generated on the scraper 429 when the mixing box shell 420 rotates, thereby extending the service life of the equipment.

[0040] During operation, the mixing motor 416 works and drives the upper output shaft 422 and the lower output shaft 423 to work through the differential 417. The lower output shaft 423 drives the driven gear 419 to rotate through the driving gear 418, thereby driving the mixing box shell 420 to rotate. The upper output shaft 422 drives the mixing shaft 424 to rotate through the transmission belt 425. The mixing shaft drives the mixing blade 427 installed on its outer side to rotate, so that the concrete on the inner wall of the mixing box shell 420 is scraped to the vicinity of the mixing blade 427 by the scraper 429, and then the concrete on the inner wall of the mixing box shell 420 is fully mixed with the concrete at the center position by the mixing blade 427.

[0041] In one embodiment, if Fig.21 As shown, the scraper 429 includes a plurality of auxiliary scrapers 439, which are plow-shaped and are arranged at equal intervals along the axis of the mixing box shell 420; the stirring mechanism 404 also includes a spiral conveying blade, which is arranged between the scraper 429 and the mixing and stirring blade 427.

[0042] In this embodiment, since the scraper 429 includes multiple auxiliary scrapers 439, the auxiliary scrapers 439 are plow-shaped, and the auxiliary scrapers 439 are arranged at equal intervals along the axis of the mixing box shell 420, so that when the mixing box shell 420 rotates, the concrete on the inner wall of the mixing box shell 420 is moved to the vicinity of the mixing and stirring shaft 424 by the scraper 429, and at the same time, the concrete of the mixing box shell 420 close to the lower cover 431 is moved toward the upper cover 421, and then the concrete moving from the lower cover 431 toward the upper cover 421 continues to move toward the upper cover 421 until the bottom of the upper cover 421 under the action of the spiral conveying sheet, and then the concrete accumulated at the bottom of the upper cover 421 moves downward along the mixing and stirring shaft 424 under the action of the mixing and stirring blades 427, thereby forming a circulation of concrete in the mixing box shell 420, achieving sufficient mixing of the concrete, and avoiding the problem of partial unevenness of the material in the agitator.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A concrete mixing device for construction, comprising a storage tank, a main mixing assembly and an aggregate storage bin, wherein the storage tank and the aggregate storage bin are respectively connected to the main mixing assembly, characterized in that: The main stirring assembly includes a main stirring frame, which includes a main stirring module, which includes a stirring mixing box and a stirring mechanism. A control room is provided on the side of the main stirring frame, and the main stirring assembly also includes an inclined belt conveyor, which connects the aggregate storage bin with the main stirring assembly.

2. The concrete mixing device for construction according to claim 1, characterized in that: The aggregate storage bin includes a material box shell, which is funnel-shaped, with a support rod at the bottom end of the material box shell, and spaced partitions inside the material box shell. It also includes a screening component, a storage hopper at the lower end of the screening component, and an aggregate weighing hopper. The aggregate weighing hopper is arranged below the storage hopper, between the support rods, and a horizontal conveying belt is provided at the top of the aggregate weighing hopper close to the end of the support rod and at the lower end of the aggregate weighing hopper.

3. The concrete mixing device for construction according to claim 2, characterized in that: The screening component includes a material baffle, the cross-section of the material baffle is trapezoidal, the material baffle is arranged at the bottom end of the material box shell, the width of the material baffle is smaller than the distance between the two partitions, and the cavity between the material baffle and the partition constitutes an aggregate outlet, and also includes an aggregate temporary storage box, which is arranged at the lower end of the aggregate outlet, and the cross-section of the aggregate temporary storage box is trapezoidal, and also includes a screening cylinder, the screening cylinder is cylindrical, a through hole connected to the screening cylinder is opened on one side of the aggregate temporary storage box, a swivel joint is provided at the through hole, the screening cylinder and the swivel joint are coaxial and rotatably matched, an annular permanent magnet array is provided on the outer side of the screening cylinder and near both ends, and also includes a driving motor and a rotating shaft, the output end of the driving motor is matched with the rotating shaft pin, the rotating shaft passes through the aggregate temporary storage box and extends to the end of the screening cylinder away from the driving motor, and spiral blades arranged at equal intervals along the spiral line are provided on the outer side of the rotating shaft, so that the spiral blades, the rotating shaft and the screening cylinder are combined to form a screw conveyor.

4. The concrete mixing device for construction according to claim 3, characterized in that: The screening assembly also includes an aggregate splash plate, which is U-shaped. A weighing box is provided at the lower end of the aggregate splash plate. The weighing box includes two symmetrically arranged weighing side plates, which are arranged at the lower end of the aggregate splash plate. The weighing end plates are also provided at both ends of the weighing side plates. The weighing bottom plates are also provided. There are two weighing bottom plates, which are hinged to the weighing side plates. The screening assembly also includes load-bearing wheels, which are provided in two groups and are symmetrically arranged. Each group of load-bearing wheels is connected by a connecting rod, which is connected to a support rod. An electromagnet that cooperates with a permanent magnet array is provided on the outer side of the load-bearing wheel. The support legs also include support legs, which extend downward to the weighing side plates. The support legs are symmetrically arranged along the load-bearing wheels. An electric telescopic rod is provided between the support legs, one end of the electric telescopic rod is connected to the weighing bottom plate, a distance sensor is provided on the outer side of the support leg, and a constant pressure telescopic support rod is provided on the lower side of the weighing side plate.

5. The concrete mixing device for construction according to claim 4, characterized in that: The screening component also includes a main gas pipeline, which is arranged in the wall of the screening cylinder and along the central axis. There are multiple main gas pipelines and they are arranged at equal intervals along the circumferential direction of the inner wall of the screening cylinder. The main gas pipeline is connected with the rotary joint. It also includes a jet pipeline, which connects the main gas pipeline with the outside. A high-pressure and high-speed jet nozzle is provided at the air outlet of the jet pipeline. The center line of the jet pipeline is perpendicular to the center line of the screening cylinder, and the angle between the jet pipeline and the inner wall of the screening cylinder is 30-60 degrees; it also includes a cleaning blade, which is hinged to the spiral blade through a torsion spring, one side of the cleaning blade is in the shape of a spiral curved surface and matches the shape of the spiral blade, and the cleaning blade cooperates with the high-pressure and high-speed jet nozzle provided at the jet pipeline.

6. The concrete mixing device for construction according to claim 1, characterized in that: The main mixing frame includes a lower support rod, a lower bearing plate is provided at the top of the lower support rod, a middle support rod extending upward is provided at the four corners of the top of the lower bearing plate, a middle bearing plate is provided at the top of the middle support rod, an upper support rod extending upward is provided at the four corners of the top of the middle bearing plate, an upper top cover is provided at the top of the upper support rod, a fence connected to the upper top cover is provided at the top of the middle bearing plate, a cement hopper connected to the storage tank is provided at the top of the middle bearing plate, an aggregate hopper connected to the inclined belt conveyor is provided, and a water pump is also provided; the mixing box and mixing mechanism of the main mixing module are arranged at the top of the lower bearing plate, a concrete premixing box is provided at the top of the mixing box, the upper end of the concrete premixing box is connected to the water pump, the aggregate hopper and the cement hopper, and the lower end of the concrete premixing box is connected to the mixing mechanism.

7. The concrete mixing device for construction according to claim 6, characterized in that: The concrete premixing box comprises a premixing box shell, which is cylindrical, and the upper end of the premixing box shell is connected to the aggregate feeding hopper and the cement feeding hopper, and also comprises a water adding pipe, one end of which is connected to the water adding pump, and also comprises a rotating pipe, which is connected to the water adding pipe, and the rotating pipe comprises an upper rotating pipe and a lower rotating pipe, and the rotating pipe is coaxially arranged with the premixing box shell; and also comprises an upper rotating hub, which is conical, the upper rotating hub is coaxial with the upper rotating pipe, and a plurality of spiral stirring blades are arranged on the outer side of the upper rotating hub, and also comprises a lower rotating hub, and the lower rotating hub is connected to the upper rotating hub. It is symmetrically arranged along the contact surface, with multiple spiral stirring blades on the outer side of the lower hub, and multiple water spray pipes are opened on the side ends of the spiral stirring blades away from the rotating tube, the water spray pipes are connected to the rotating tube, and the spiral stirring blades on the outer side of the upper hub are in opposite spiral directions to the spiral stirring blades on the outer side of the lower hub; it also includes a premixing motor, a motor cover is provided on the outer side of the premixing motor, and a coaxial inverter is provided at the output end of the premixing motor, the first output end of the coaxial inverter is engaged with the upper rotating tube, and the second output end of the coaxial inverter is engaged with the lower rotating tube.

8. The concrete mixing device for construction according to claim 6, characterized in that: The stirring and mixing box includes a mixing box shell, which is cylindrical, and a driven gear is provided on the outer side of the mixing box shell, and an upper sliding jacket and a lower sliding jacket are provided at the upper and lower ends of the mixing box shell respectively, and also includes an upper cover and a lower cover, the upper cover is provided at the top end of the upper sliding jacket, and the lower cover is provided at the bottom end of the lower sliding jacket, and a through hole communicating with the inside and the outside is opened at the top end of the upper cover, and a stirring box feed pipe communicating with the concrete premixing box is provided at the through hole; it also includes a scraper, the interior of the scraper is hollow, the scraper is provided between the upper sliding jacket and the lower sliding jacket and is tightly fitted with the inner wall of the mixing box shell, and also includes a fixing plate, the interior of the fixing plate is hollow and is connected with the scraper.

9. The concrete mixing device for construction according to claim 7, characterized in that: The scraper includes an outer side surface, the curvature radius of the mixing box shell is smaller than the curvature radius of the outer side surface, and also includes a front side curved surface, the front side curved surface is in the shape of an arc surface, and also includes a rear side curved surface, a plurality of cleaning nozzles are arranged on the rear side curved surface, and also includes an outward turning surface; the stirring mechanism includes a mixing and stirring motor, a differential is arranged at the output end of the mixing and stirring motor, the upper output shaft and the lower output shaft of the differential are coaxial, a driving gear is arranged on the outer side of the lower output shaft away from the upper output shaft end, the driving gear is meshed with the driven gear, and also includes a mixing and stirring shaft, the mixing and stirring shaft is connected to the upper output shaft through a set transmission belt, a plurality of mixing and stirring blades are arranged on the outer side of the mixing and stirring shaft, the mixing and stirring blades are arranged along a spiral line around the mixing and stirring shaft, holes are arranged on the mixing and stirring blades, and also includes a gas-liquid feed pipe, and the fixed plate is connected to the gas-liquid feed pipe through a rotary joint.

10. The concrete mixing device for construction according to claim 8, characterized in that: The scraper includes a plurality of auxiliary scrapers, which are plough-shaped and arranged at equal intervals along the axis of the mixing box shell; the stirring mechanism also includes a spiral conveying blade, which is arranged between the scraper and the mixing and stirring blade.

Images