A concrete mixing device for construction engineering

Abstract

The utility model relates to concrete processing technical field especially concrete mixing device for constructional engineering, including fixed setting U -shaped continuous ground frame, install the mixing container in the U -shaped cavity of U -shaped continuous ground frame, fixed mounting has swing mechanism on the middle part outside wall of mixing container, the right -hand member of swing mechanism is connected with drive assembly, install the cover in the top of mixing container, fixed mounting has stirring drive piece in the top of cover, the bottom of stirring drive piece is connected with multidirectional stirring subassembly. The utility model discloses through adopting vertical type stirring shaft and drive main / sub mixing cutter rotary stirring, the compound stirring mode of periodic swing of mixing container, cooperate the design of main / sub scraper towards the stirring chamber inner wall and the bottom scraping of lateral arc scraper, effectively eliminate the dead angle of stirring and scrape the wall surface attached material, significantly improve the mixing uniformity of each component of concrete slurry.

Description

Technical Field

[0001] This utility model relates to the field of concrete processing technology, and in particular to a concrete mixing device for construction engineering. Background Technology

[0002] As a core structural material in building construction, the homogeneity of concrete mixing directly determines its key properties such as strength and impermeability after hardening. Traditional concrete mixing often employs a single mechanical mixing mode, which easily creates fixed dead zones within the mixing drum, leading to uneven mixing of aggregates and cement paste, and resulting in localized segregation.

[0003] There are also some improvement solutions in the existing technology. For example, the patent document with patent application number CN202420923218.3 discloses a concrete mixing device for construction engineering, which removes air from the bucket by vacuum pump, releases air bubbles by ultrasonic vibrating rod, and achieves temperature control by fixing a heating jacket on the outer wall, which improves the mixing quality to a certain extent.

[0004] However, its specific structure reveals that the existing patented device still has significant shortcomings: First, there is still a large gap between the bottom cavity wall of the device and the blades, which affects the mixing effect. In addition, water in the dead corner area is prone to forming cement clumps with the insufficiently mixed cement, which requires manual cleaning later, increasing construction costs and time.

[0005] Secondly, the outer wall of the device is fixed with a heating jacket that relies on heat conduction through the barrel wall. However, the concrete in the dead corner area has poor fluidity, and heat cannot be transferred through the mixing cycle. The concrete slurry in the barrel wall area heats up quickly, while the concrete in the dead corner area heats up slowly. This can easily lead to premature hydration of the cement in the high-temperature area, affecting the workability of the concrete.

[0006] Therefore, it is necessary to design a concrete mixing device that has good mixing effect and can be stably heated. Utility Model Content

[0007] To solve one of the aforementioned technical problems, the present invention provides the following technical solution: a concrete mixing device for construction engineering, comprising a fixedly installed U-shaped ground frame, a mixing container installed inside the U-shaped cavity of the U-shaped ground frame, a swing mechanism fixedly installed on the outer wall of the middle part of the mixing container, the left and right ends of the swing mechanism respectively moving through the shaft holes at the vertical section of the corresponding side of the U-shaped ground frame and extending to their outer sides, a drive assembly connected to the right end of the swing mechanism, the drive assembly being used to drive the swing mechanism and the mixing container to complete periodic swinging, a cover installed on the top of the mixing container, a mixing drive component fixedly installed on the top of the cover, a multi-directional mixing component connected to the bottom of the mixing drive component, the lower end of the multi-directional mixing component extending into the mixing cavity of the mixing container and mixing the concrete slurry inside, a discharge component installed at the bottom of the mixing container, and a feed pipe installed on the upper outer wall of the mixing container.

[0008] Based on any of the above technical solutions, a further optimization is made as follows: the stirring container includes a vertically arranged rigid cylinder, the bottom of the rigid cylinder is hemispherical, the top of the rigid cylinder is open and the stirring chamber is provided inside it, the cap is fixedly sleeved on the upper outer wall of the rigid cylinder, the outer wall of the rigid cylinder adopts a cavity structure and an annular heating cavity is formed inside its side wall, the top of the heating cavity is sealed, the heating cavity is filled with heat transfer oil, and the feed pipe is integrally formed on the upper outer wall of the rigid cylinder, the inner cavity of the feed pipe is connected to the inside of the stirring chamber.

[0009] Based on any of the above technical solutions, a further optimization is made as follows: a hot oil outlet pipe is integrally formed on the upper outer wall of the rigid cylinder, and a hot oil inlet pipe is integrally formed on the lower hemispherical outer wall of the rigid cylinder. Both the hot oil inlet pipe and the hot oil outlet pipe are connected to an external temperature-controlled thermal oil furnace through a heat-resistant metal corrugated pipeline with a pump.

[0010] Based on any of the above technical solutions, a further optimization is made as follows: the swing mechanism includes a fixed ring fixedly installed on the middle outer wall of the rigid cylinder, and support shafts are symmetrically welded on the left and right sides of the fixed ring. The outer ends of the two support shafts respectively move through the shaft holes at the vertical section of the U-shaped ground frame on their corresponding sides and extend to their outer sides. The right end of the support shaft on the right side is connected to the drive assembly.

[0011] Based on any of the above technical solutions, a further optimization is made as follows: the drive assembly includes a first motor fixedly installed on the right outer side wall of the U-shaped ground frame, a belt drive component fixedly installed at the output end of the first motor, and the output end of the belt drive component is fixedly connected to the end of the support shaft at its corresponding position. The belt drive component includes a drive pulley fixedly mounted on the motor shaft of the first motor and a driven pulley fixedly mounted on the right end of the support shaft on the right side. The drive pulley and the driven pulley are connected by a toothed belt.

[0012] Based on any of the above technical solutions, a further optimization is made as follows: the stirring drive component includes a motor mounting bracket fixedly installed on the top of the cover, a second motor is fixedly installed inside the motor mounting bracket, and the bottom of the motor shaft of the second motor is used to connect to the top of the multi-directional stirring assembly and drive it to rotate.

[0013] Based on any of the above technical solutions, a further optimization is made as follows: the multi-directional stirring assembly includes a vertically arranged vertical stirring shaft, which is coaxially arranged with the stirring chamber. The top of the vertical stirring shaft extends movably to the top of the cover and is coaxially fixedly connected to the bottom of the motor shaft of the second motor. Several main stirring blades are arranged at intervals from top to bottom on the outer wall of the vertical stirring shaft inside the stirring chamber. A lateral stirring shaft is fixedly installed on the outer wall of the vertical stirring shaft in the hemispherical stirring chamber section. A lateral arc-shaped scraper is fixed at the outer end of the lateral stirring shaft. The outer wall of the lateral arc-shaped scraper has the same outer diameter as the spherical side wall of the stirring chamber. A secondary stirring blade is fixedly installed on the outer wall of the vertical stirring shaft on the opposite side of the lateral arc-shaped scraper. The outer ends of each main stirring blade and the outer ends of the secondary stirring blades are all located close to the inner wall of the stirring chamber.

[0014] Based on any of the above technical solutions, a further optimization is made as follows: the discharge component includes a discharge metal bellows fixedly installed at the bottom of the rigid cylinder, a control valve is installed on the discharge metal bellows, and the top of the discharge metal bellows extends to the bottom of the mixing chamber and is connected to its interior.

[0015] Based on any of the above technical solutions, a further optimization is made as follows: the main stirring blade includes a main horizontal stirring shaft, and a main scraper is fixed at the outer end of the main horizontal stirring shaft, the main scraper being disposed facing the inner wall of the stirring chamber; the auxiliary stirring blade includes a secondary horizontal stirring shaft, and a secondary scraper is fixed at the outer end of the secondary horizontal stirring shaft, the secondary scraper being disposed facing the inner wall of the stirring chamber.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model adopts a composite mixing mode that uses a vertical mixing shaft to drive the main / auxiliary mixing blades to rotate and mix, and the mixing container to oscillate periodically. Combined with the design of the main / auxiliary scrapers facing the inner wall of the mixing chamber and the bottom scraping of the side arc-shaped scraper, it effectively eliminates mixing dead corners and scrapes off the materials attached to the wall surface, significantly improving the mixing uniformity of the various components of the concrete slurry.

[0017] 2. This utility model forms a heating cavity through a rigid collet structure, combined with a heat-conducting oil circulation loop with oil inlet at the bottom and oil outlet at the top, and a heat-resistant metal corrugated pipe, to achieve stable temperature control of the material in the stirring chamber. The corrugated pipe can be adapted to the swaying of the container to avoid damage, thus improving the adaptability of the device in different temperature environments.

[0018] 3. This utility model reduces equipment vibration and wear through the stable support of the U-shaped ground frame, the symmetrical support shaft design of the swing mechanism, and the buffer and shock absorption function of the belt drive. At the same time, the main / auxiliary stirring blades have both stirring and wall scraping functions, simplifying the structure, reducing maintenance costs, and improving the stability and economy of equipment operation. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a partially enlarged structural schematic diagram of the rigid cylinder of this utility model.

[0022] Figure 3 This is a schematic diagram of the internal structure of the rigid cylinder of this utility model.

[0023] In the diagram: 1. U-shaped ground frame; 2. Cover; 3. Feed pipe; 4. Rigid cylinder; 5. Mixing chamber; 6. Heating cavity; 7. Heat transfer oil; 8. Hot oil outlet pipe; 9. Hot oil inlet pipe; 10. Fixing ring; 11. Support shaft; 12. First motor; 13. Drive pulley; 14. Driven pulley; 15. Toothed belt; 16. Motor mounting bracket; 17. Second motor; 18. Motor shaft; 19. Vertical mixing shaft; 20. Main mixing blade; 2001. Main horizontal mixing shaft; 2002. Main scraper; 21. Side mixing shaft; 22. Side arc scraper; 23. Secondary mixing blade; 2301. Secondary horizontal mixing shaft; 2302. Secondary scraper; 24. Discharge corrugated metal pipe; 25. Control valve. Detailed Implementation

[0024] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of the present utility model, and are therefore merely examples and should not be construed as limiting the scope of protection of the present utility model. The specific structure of the present utility model is as follows: Figures 1-3 As shown in the image.

[0025] Example 1: A concrete mixing device for construction engineering includes a fixedly installed U-shaped ground frame. A mixing container is installed inside the U-shaped cavity of the U-shaped ground frame. A swing mechanism is fixedly installed on the outer wall of the middle part of the mixing container. The left and right ends of the swing mechanism respectively move through the shaft holes at the vertical section of the U-shaped ground frame on their respective sides and extend to their outer sides. A drive assembly is connected to the right end of the swing mechanism. The drive assembly is used to drive the swing mechanism and the mixing container to complete periodic swinging. A cover is installed on the top of the mixing container. A mixing drive is fixedly installed on the top of the cover. A multi-directional mixing assembly is connected to the bottom of the mixing drive. The lower end of the multi-directional mixing assembly extends into the mixing cavity of the mixing container and mixes the concrete slurry inside. A discharge device is installed at the bottom of the mixing container. A feed pipe is installed on the upper outer wall of the mixing container.

[0026] This utility model of a concrete mixing device for construction engineering relies on external feeding equipment to transport concrete batching materials and water to the feed pipe, which then enters the mixing chamber. The incoming materials are rapidly mixed under the action of the mixing drive and multi-directional mixing components. During the mixing process, heat transfer oil at an appropriate temperature is supplied through an external heat transfer oil heater in conjunction with a heat-resistant corrugated metal pipeline with a pump. In addition, considering the uniformity of the mixing of various components in the concrete, activating the drive component during the mixing process enables the drive component to drive the oscillating mechanism and the entire mixing container to complete a periodic oscillation of a specified amplitude, thereby improving the mixing effect of the concrete slurry.

[0027] Specifically, the device is first fixedly installed on the ground using a U-shaped ground-connecting frame. The mixing container is then assembled into the U-shaped cavity of the frame. A swing mechanism on the outer wall of the middle section of the mixing container enables a movable connection between the container and the frame. The support structures at both ends of the swing mechanism pass through the vertical shaft holes of the U-shaped frame, allowing the mixing container to rotate around the axis of the swing mechanism. The drive assembly is connected to the right end of the swing mechanism. When powered on, the drive assembly outputs power to drive the swing mechanism to operate periodically, thereby causing the mixing container to swing periodically in sync. The top cover of the mixing container seals the mixing chamber. The mixing drive unit fixed to the top of the cover outputs rotational power when powered on, driving the multi-directional mixing assembly connected to its bottom to rotate within the mixing chamber, mixing the concrete slurry inside. During operation, concrete and water enter the mixing chamber through the feed pipe on the upper outer wall and are discharged through the bottom discharge component after mixing.

[0028] The operation process is as follows: First, the external feeding equipment is started, delivering concrete ingredients (such as cement, sand, and gravel) and water according to the mix proportions to the feed pipe. Under the action of gravity and feeding pressure, the materials flow into the mixing chamber of the mixing container through the feed pipe. Second, the mixing drive is powered on and starts, outputting rotational power to drive the multi-directional mixing components to rotate at high speed in the mixing chamber. Through the mechanical action between the mixing components and the materials, rapid shearing and mixing of the materials are achieved. Third, the external thermal oil heater is started simultaneously, heating the thermal oil to the set temperature. The heat-resistant metal corrugated pipeline with pump is started, and the pump body... Under pressure, high-temperature heat transfer oil is delivered to the heating structure of the mixing container, and the temperature of the material in the mixing chamber is regulated by heat conduction. In the fourth step, the drive component is powered on and starts, outputting periodic power according to the preset program, driving the oscillating mechanism to rotate around the support axis. The oscillating mechanism drives the entire mixing container to oscillate periodically at a specified amplitude, so that the material in the mixing chamber is superimposed and tumbled on the basis of rotation and stirring, breaking the laminar flow state of the material and realizing the uniform mixing of each component. In the whole process, rotation and stirring, temperature regulation and container oscillation are carried out simultaneously, and the mixing effect is improved in a coordinated manner.

[0029] Based on any of the above technical solutions, a further optimization is made as follows: the stirring container includes a vertically arranged rigid cylinder, the bottom of the rigid cylinder is hemispherical, the top of the rigid cylinder is open and the stirring chamber is provided inside it, the cap is fixedly sleeved on the upper outer wall of the rigid cylinder, the outer wall of the rigid cylinder adopts a cavity structure and an annular heating cavity is formed inside its side wall, the top of the heating cavity is sealed, the heating cavity is filled with heat transfer oil, and the feed pipe is integrally formed on the upper outer wall of the rigid cylinder, the inner cavity of the feed pipe is connected to the inside of the stirring chamber.

[0030] Heating with heat transfer oil can prevent materials from condensing due to low temperatures in low-temperature environments, ensuring the continuity of mixing operations. In high-temperature environments, heat dissipation can be regulated by controlling the low-temperature circulation of the heat transfer oil, thus preventing the materials from overheating.

[0031] In addition to improving the uniformity of mixing, the periodic oscillation of the mixing container can also help the material to gather towards the discharge port in the later stage of mixing, which facilitates subsequent discharge; the rapid mixing action of the multi-directional mixing component can not only mix the materials, but also break up the lumps in the materials, thereby improving the homogeneity of the concrete slurry.

[0032] The main body of the mixing container adopts a vertically arranged rigid cylinder. The structural strength of the rigid material ensures the stability of the container during mixing, avoiding deformation caused by material impact or swaying. The bottom of the rigid cylinder is designed as a hemispherical shape, forming a smooth curved surface at the bottom of the mixing chamber and reducing dead corners for material accumulation. The open structure at the top of the rigid cylinder facilitates the installation of the cover and internal maintenance, while also providing space for the insertion of the mixing components. The cover is connected to the upper outer wall of the rigid cylinder through a fixed sleeve, achieving a seal for the mixing chamber. The outer wall of the rigid cylinder adopts a cavity structure, forming an annular heating cavity. The top is sealed to ensure the airtightness of the heating cavity. The heat transfer oil filled in the heating cavity can exchange heat with the high-temperature heat transfer oil transported externally. Heat is transferred to the material in the mixing chamber through heat conduction through the side wall of the rigid cylinder, achieving material temperature regulation. The feed pipe, integrally formed on the upper outer wall, is connected to the mixing chamber, ensuring a smooth material introduction path. The integrally formed structure improves the connection strength and prevents material leakage.

[0033] Based on any of the above technical solutions, a further optimization is made as follows: a hot oil outlet pipe is integrally formed on the upper outer wall of the rigid cylinder, and a hot oil inlet pipe is integrally formed on the lower hemispherical outer wall of the rigid cylinder. Both the hot oil inlet pipe and the hot oil outlet pipe are connected to an external temperature-controlled thermal oil furnace through a heat-resistant metal corrugated pipeline with a pump.

[0034] Based on any of the above technical solutions, a further optimization is made as follows: the swing mechanism includes a fixed ring fixedly installed on the middle outer wall of the rigid cylinder, and support shafts are symmetrically welded on the left and right sides of the fixed ring. The outer ends of the two support shafts respectively move through the shaft holes at the vertical section of the U-shaped ground frame on their corresponding sides and extend to their outer sides. The right end of the support shaft on the right side is connected to the drive assembly.

[0035] The hot oil inlet pipe is integrally formed on the lower hemispherical outer wall of the rigid cylinder, and the hot oil outlet pipe is integrally formed on the upper outer wall of the rigid cylinder. Both are connected to an external temperature-controlled thermal oil furnace via heat-resistant corrugated metal pipes with pumps, forming a complete thermal oil circulation loop. During operation, the external temperature-controlled thermal oil furnace heats the thermal oil to the set temperature. The pipeline system with pumps is activated, and under the pressure of the pump, the high-temperature thermal oil flows from the hot oil inlet pipe into the heating cavity of the rigid cylinder. Since the inlet is located at the bottom and the outlet at the top, the thermal oil flows from bottom to top in the heating cavity, making full contact with the side wall of the rigid cylinder and exchanging heat to transfer heat to the material in the stirring chamber. After heat exchange, the temperature of the thermal oil decreases, and it flows out from the upper hot oil outlet pipe, returning to the thermal oil furnace for reheating, thus realizing the recycling of the thermal oil. The temperature-controlled thermal oil furnace can monitor and adjust the temperature of the thermal oil in real time to ensure the temperature stability in the heating cavity.

[0036] The hot oil inlet pipe enables the high-temperature heat transfer oil to be introduced into the heating cavity; the hot oil outlet pipe enables the heat transfer oil to be discharged after heat exchange; the heat-resistant metal corrugated pipeline with pump enables the heat transfer oil to be transported and adapts to the oscillation of the stirring container; the external temperature-controlled heat transfer oil furnace enables the heat transfer oil to be heated and the temperature to be controlled; the heating cavity enables the heat transfer oil to flow and provides space for heat exchange.

[0037] In addition to transferring heat, the heat transfer oil circulation loop can reduce the temperature of the heat transfer oil in high-temperature environments such as summer through the cooling function of the heat transfer oil furnace, thereby cooling the materials in the mixing chamber and expanding the applicable environment range of the device. The hot oil inlet pipe is located on the lower hemispherical sidewall, so that the high-temperature heat transfer oil first heats the materials at the bottom of the mixing chamber, preventing the materials at the bottom from settling and condensing due to excessively low temperature, thus improving the overall mixing effect. The flexible structure of the heat-resistant metal corrugated pipe can absorb vibrations during equipment operation, reducing the impact of vibrations on pipe interfaces and the heat transfer oil furnace, and extending the service life of the equipment. The sealed design of the circulation loop can prevent the heat transfer oil from oxidizing and deteriorating due to contact with air, extending the service life of the heat transfer oil and reducing maintenance costs.

[0038] Based on any of the above technical solutions, a further optimization is made as follows: the drive assembly includes a first motor fixedly installed on the right outer side wall of the U-shaped ground frame, a belt drive component fixedly installed at the output end of the first motor, and the output end of the belt drive component is fixedly connected to the end of the support shaft at its corresponding position. The belt drive component includes a drive pulley fixedly mounted on the motor shaft of the first motor and a driven pulley fixedly mounted on the right end of the support shaft on the right side. The drive pulley and the driven pulley are connected by a toothed belt.

[0039] The drive assembly uses a first motor as its power source. The first motor is fixedly connected to the outer right side wall of the U-shaped ground frame, utilizing the structural strength of the U-shaped ground frame to provide stable support for the motor. A belt drive component installed at the output end of the first motor serves as the power transmission medium. Its drive pulley is fixedly connected to the motor shaft of the first motor, and the driven pulley is fixedly connected to the right end of the right support shaft. The drive pulley and the driven pulley are connected by a toothed belt. During operation, the first motor is powered on and started, and the motor shaft drives the drive pulley to rotate. The drive pulley drives the driven pulley to rotate synchronously through the meshing transmission of the toothed belt. The driven pulley drives the right support shaft to rotate, which in turn drives the stirring container to oscillate periodically through the oscillation mechanism. The meshing transmission of the toothed belt ensures a stable speed ratio between the drive pulley and the driven pulley, enabling precise control of the oscillation amplitude and frequency of the stirring container.

[0040] In addition to protecting the equipment, the belt drive's buffering and shock absorption function can also prevent motor overload when the mixing container encounters significant resistance (such as material agglomeration), thus providing overload protection. The meshing transmission of the toothed belt can achieve a certain degree of noise reduction, lowering equipment operating noise and improving the working environment compared to rigid transmission methods such as gear transmission. The external installation of the first motor facilitates motor heat dissipation, preventing the motor temperature from becoming too high due to a confined environment and improving motor operating stability. The detachable nature of the belt drive components allows the belt to be removed when the device needs to be transported or stored, reducing space occupation and preventing belt aging and adhesion caused by long-term idleness.

[0041] Based on any of the above technical solutions, a further optimization is made as follows: the stirring drive component includes a motor mounting bracket fixedly installed on the top of the cover, a second motor is fixedly installed inside the motor mounting bracket, and the bottom of the motor shaft of the second motor is used to connect to the top of the multi-directional stirring assembly and drive it to rotate.

[0042] The mixing drive unit uses a motor mounting bracket as its installation base and is connected to the top of the cover via a fixed installation method. The motor mounting bracket forms an installation space to accommodate and fix the second motor. The second motor is fixed inside the motor mounting bracket with bolts or other fasteners to ensure the stability of the motor installation. The bottom of the second motor's shaft extends out of the motor mounting bracket and connects to the top of the multi-directional mixing assembly, using a rigid connection method (such as a key connection or flange connection) to ensure reliable power transmission. During operation, the second motor is powered on and starts, with its shaft rotating at high speed around its own axis. This rotation, through the bottom connection structure, drives the multi-directional mixing assembly to rotate synchronously, allowing the multi-directional mixing assembly to mix the concrete slurry within the mixing chamber. The motor mounting bracket serves to fix, protect, and position the second motor, ensuring the coaxiality of the motor shaft and the multi-directional mixing assembly, thus improving mixing stability.

[0043] Example 2: Compared with Example 1, this example also includes the following technical features: Based on any of the above technical solutions, a further optimization is made as follows: the multi-directional stirring assembly includes a vertically arranged vertical stirring shaft, which is coaxially arranged with the stirring chamber. The top of the vertical stirring shaft extends movably to the top of the cover and is coaxially fixedly connected to the bottom of the motor shaft of the second motor. Several main stirring blades are arranged at intervals from top to bottom on the outer wall of the vertical stirring shaft inside the stirring chamber. A lateral stirring shaft is fixedly installed on the outer wall of the vertical stirring shaft in the hemispherical stirring chamber section. A lateral arc-shaped scraper is fixed at the outer end of the lateral stirring shaft. The outer wall of the lateral arc-shaped scraper has the same outer diameter as the spherical side wall of the stirring chamber. A secondary stirring blade is fixedly installed on the outer wall of the vertical stirring shaft on the opposite side of the lateral arc-shaped scraper. The outer ends of each main stirring blade and the outer ends of the secondary stirring blades are all located close to the inner wall of the stirring chamber.

[0044] The multi-directional mixing assembly uses a vertical mixing shaft as its core transmission component. The vertical mixing shaft is vertically positioned and coaxial with the mixing chamber, ensuring the central symmetry of the assembly's rotation during mixing. The top of the vertical mixing shaft extends through a cover and is coaxially fixed to the bottom of the second motor shaft. This coaxial connection ensures the coaxiality of power transmission and reduces eccentric vibration during rotation. During operation, the second motor drives the vertical mixing shaft to rotate around its axis, which in turn drives the main mixing blades, side mixing shafts, and auxiliary mixing blades to rotate synchronously. Several main mixing blades, spaced apart from top to bottom, perform multi-layer shearing of the concrete slurry in the middle and upper parts of the mixing chamber during rotation. The mixing mechanism cuts and stirs to achieve large-scale material mixing. The lateral stirring shaft located in the hemispherical mixing chamber drives the lateral arc-shaped scraper at its outer end to rotate. Since the outer wall of the lateral arc-shaped scraper has the same diameter as the inner wall of the spherical side of the mixing chamber, the scraper can rotate close to the spherical side wall, scraping off the material attached to the side wall and stirring the material at the bottom at the same time. The auxiliary stirring blade on the opposite side of the lateral arc-shaped scraper complements the main stirring blade and the lateral arc-shaped scraper, supplementing the stirring of areas inside the mixing chamber that have not been fully stirred. The outer ends of the main stirring blade and the auxiliary stirring blade are close to the inner side wall of the mixing chamber, ensuring that the stirring range covers the entire mixing chamber and avoiding stirring dead corners near the side wall.

[0045] Based on any of the above technical solutions, a further optimization is made as follows: the discharge component includes a discharge metal bellows fixedly installed at the bottom of the rigid cylinder, a control valve is installed on the discharge metal bellows, and the top of the discharge metal bellows extends to the bottom of the mixing chamber and is connected to its interior.

[0046] The discharge component uses a corrugated metal discharge pipe as its core guide component. It is fixedly connected to the bottom of the rigid cylinder, with its top extending to the bottom of the mixing chamber and communicating with the interior of the mixing chamber, forming a discharge channel from the bottom of the mixing chamber to the outside. The control valve installed on the corrugated metal discharge pipe adopts a mechanical opening and closing structure, which can be manually or electrically controlled to open and close the valve. During operation, the control valve is in the closed state before the mixing is completed to ensure the airtightness of the mixing chamber and ensure the stability of the mixing and heating process. After the mixing is completed, the control valve is opened, and the concrete slurry in the mixing chamber flows into the corrugated metal discharge pipe from the bottom of the mixing chamber under the action of gravity, and is then discharged to the external receiving equipment through the corrugated pipe. Because the corrugated metal discharge pipe is flexible, it can adapt to the oscillation of the rigid cylinder when the mixing container oscillates periodically, avoiding the pulling damage of the discharge pipeline caused by the oscillation of the container and ensuring the integrity of the discharge channel.

[0047] Based on any of the above technical solutions, a further optimization is made as follows: the main stirring blade includes a main horizontal stirring shaft, and a main scraper is fixed at the outer end of the main horizontal stirring shaft, the main scraper being disposed facing the inner wall of the stirring chamber; the auxiliary stirring blade includes a secondary horizontal stirring shaft, and a secondary scraper is fixed at the outer end of the secondary horizontal stirring shaft, the secondary scraper being disposed facing the inner wall of the stirring chamber.

[0048] The main stirring blade is supported by the main horizontal stirring shaft and is assembled to the outer wall of the vertical stirring shaft through a fixed connection, so that the main horizontal stirring shaft and the vertical stirring shaft form a rigid whole. The main horizontal stirring shaft extends radially along the vertical stirring shaft, and the main scraper fixed at its outer end is set towards the inner wall of the stirring chamber. The secondary stirring blade is symmetrical to the main stirring blade, supported by the secondary horizontal stirring shaft, fixed at the corresponding position of the vertical stirring shaft and extending to near the inner wall. The secondary scraper also faces the inner wall of the stirring chamber.

[0049] During operation, the vertical mixing shaft rotates under the drive of the second motor, synchronously driving the main horizontal mixing shaft and the auxiliary horizontal mixing shaft to perform circular motion around the axis of the vertical mixing shaft. When the main scraper moves with the main horizontal mixing shaft, its blade facing the inner wall maintains a small gap with the inner wall of the mixing chamber. During the rotation, it scrapes off the concrete slurry adhering to the inner wall. At the same time, the rotation of the main horizontal mixing shaft drives the surrounding material to form radial flow, realizing the shearing and mixing of the material in the middle and upper part of the mixing chamber. The auxiliary scraper moves synchronously with the auxiliary horizontal mixing shaft, scraping and mixing the material on the other side of the inner wall and the corresponding area of ​​the mixing chamber, forming a symmetrical mixing pattern with the main mixing blades, ensuring that there is no residue of material around the inner wall and that it is fully mixed.

[0050] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. For those skilled in the art, any alternative improvements or changes made to the implementation of this utility model fall within the protection scope of this utility model.

[0051] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A concrete mixing device for construction engineering, characterized in that: The system includes a fixed U-shaped ground frame, a mixing container installed inside the U-shaped cavity of the U-shaped ground frame, a swing mechanism fixedly installed on the middle outer wall of the mixing container, the left and right ends of the swing mechanism respectively moving through the shaft holes at the vertical section of the corresponding side of the U-shaped ground frame and extending to their outer sides, a drive assembly connected to the right end of the swing mechanism, the drive assembly being used to drive the swing mechanism and the mixing container to complete periodic swinging, a cover installed on the top of the mixing container, a stirring drive component fixedly installed on the top of the cover, a multi-directional stirring component connected to the bottom of the stirring drive component, the lower end of the multi-directional stirring component extending into the mixing chamber of the mixing container to stir the concrete slurry inside, a discharge component installed at the bottom of the mixing container, and a feed pipe installed on the upper outer wall of the mixing container.

2. The concrete mixing device for construction engineering according to claim 1, characterized in that: The stirring container includes a vertically arranged rigid cylinder with a hemispherical bottom and an open top containing the stirring chamber. A cap is fixedly fitted onto the upper outer wall of the rigid cylinder. The outer wall of the rigid cylinder has a cavity structure with an annular heating cavity inside. The top of the heating cavity is sealed, and the heating cavity is filled with heat-conducting oil. A feed pipe is integrally formed on the upper outer wall of the rigid cylinder, and the inner cavity of the feed pipe is connected to the inside of the stirring chamber.

3. A concrete mixing device for construction engineering according to claim 2, characterized in that: A hot oil outlet pipe is integrally formed on the upper outer wall of the rigid cylinder, and a hot oil inlet pipe is integrally formed on the lower hemispherical outer wall of the rigid cylinder. Both the hot oil inlet pipe and the hot oil outlet pipe are connected to an external temperature-controlled thermal oil furnace through a heat-resistant metal corrugated pipeline with a pump.

4. A concrete mixing device for construction engineering according to claim 3, characterized in that: The swing mechanism includes a fixed ring fixedly installed on the middle outer wall of the rigid cylinder. Support shafts are symmetrically welded on the left and right sides of the fixed ring. The outer ends of the two support shafts respectively move through the shaft holes at the vertical section of the U-shaped ground frame on their corresponding sides and extend to their outer sides. The right end of the right support shaft is connected to the drive assembly.

5. A concrete mixing device for construction engineering according to claim 4, characterized in that: The drive assembly includes a first motor fixedly installed on the right outer side wall of the U-shaped ground frame, and a belt drive component fixedly installed at the output end of the first motor. The output end of the belt drive component is fixedly connected to the end of the support shaft at the corresponding position. The belt drive component includes a drive pulley fixedly mounted on the motor shaft of the first motor and a driven pulley fixedly mounted on the right end of the support shaft on the right side. The drive pulley and the driven pulley are connected by a toothed belt.

6. A concrete mixing device for construction engineering according to claim 5, characterized in that: The stirring drive includes a motor mounting bracket fixedly installed on the top of the cover, and a second motor fixedly installed inside the motor mounting bracket. The bottom of the motor shaft of the second motor is used to connect to the top of the multi-directional stirring assembly and drive it to rotate.

7. A concrete mixing device for construction engineering according to claim 6, characterized in that: The multi-directional stirring assembly includes a vertically arranged vertical stirring shaft, which is coaxially arranged with the stirring chamber. The top of the vertical stirring shaft extends movably to the top of the cover and is coaxially fixed to the bottom of the motor shaft of the second motor. Several main stirring blades are arranged at intervals from top to bottom on the outer wall of the vertical stirring shaft inside the stirring chamber. A lateral stirring shaft is fixedly installed on the outer wall of the vertical stirring shaft in the hemispherical stirring chamber. A lateral arc-shaped scraper is fixed at the outer end of the lateral stirring shaft. The outer wall of the lateral arc-shaped scraper has the same outer diameter as the spherical side wall of the stirring chamber. An auxiliary stirring blade is fixedly installed on the outer wall of the vertical stirring shaft on the opposite side of the lateral arc-shaped scraper. The outer ends of the main stirring blades and the outer ends of the auxiliary stirring blades are all located close to the inner wall of the stirring chamber.

8. A concrete mixing device for construction engineering according to claim 7, characterized in that: The discharge component includes a discharge metal bellows fixedly installed at the bottom of the rigid cylinder, a control valve is installed on the discharge metal bellows, and the top of the discharge metal bellows extends to the bottom of the mixing chamber and communicates with its interior.

9. A concrete mixing device for construction engineering according to claim 8, characterized in that: The main stirring blade includes a main horizontal stirring shaft, and a main scraper is fixed at the outer end of the main horizontal stirring shaft, with the main scraper facing the inner wall of the stirring chamber; the auxiliary stirring blade includes a secondary horizontal stirring shaft, and a secondary scraper is fixed at the outer end of the secondary horizontal stirring shaft, with the secondary scraper facing the inner wall of the stirring chamber.

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