Concrete mixing device

Abstract

The invention relates to a concrete mixing device which comprises a mixing tank, a cover plate is arranged at the top end of the mixing tank, a supporting frame is fixedly arranged at the top end of the cover plate, and a mixing and stirring mechanism is arranged in the supporting frame and the mixing tank in a penetrating mode. The mixing and stirring mechanism is composed of a stirring motor, a driving shaft, a middle transmission assembly, a stirring shaft, a spiral stirring blade and a plurality of horizontal stirring blades, the stirring motor is fixedly connected to the middle of the top end of the supporting frame, the driving shaft is fixedly connected to an output shaft of the stirring motor, and the stirring shaft is rotationally connected into the mixing tank; the middle transmission assembly is connected between the driving shaft and the stirring shaft, the spiral stirring blade and the horizontal stirring blade are fixedly connected to the side face of the stirring shaft, and the middle transmission assembly is composed of a positioning guide sleeve, a sliding connecting sleeve, a flat shaft and a positioning arm. The concrete stirring device has the advantage of being capable of lifting and ramming, and the problem that an existing concrete stirring device can only conduct pure stirring and cannot conduct ramming is solved.

Description

Technical Field

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

[0002] Self-compacting concrete refers to concrete that can flow and compact under its own gravity, can completely fill the formwork even in the presence of dense steel bars, and has good homogeneity and does not require additional vibration. During the production and processing of self-compacting concrete and other types of concrete, it is necessary to mix and stir the raw materials of each component to improve the quality of production and processing. At present, when the vertical mixing device used for mixing self-compacting concrete components is in use, its mixing blades can only rotate, but cannot achieve lifting and lowering movements, making it difficult to further improve the uniformity and mixing efficiency of mixing. Therefore, this application proposes a self-compacting concrete component mixing device to improve the existing mixing device; the existing mixing device cannot dehumidify the air above the mixing barrel, thereby affecting the quality of the concrete. Summary of the invention

[0003] The first object of the present invention is to provide a concrete mixing device capable of lifting and stirring, so as to solve the problem that the existing concrete mixing device can only perform pure stirring but not stirring.

[0004] The second object of the present invention is to further provide a concrete mixing device capable of dehumidifying the concrete surface, thereby solving the problem that the existing concrete mixing device cannot dehumidify the concrete surface.

[0005] The above technical problems are solved by the following technical solutions: A concrete mixing device, including a mixing tank, characterized in that: a cover plate is arranged at the top of the mixing tank, a support frame is fixedly arranged at the top of the cover plate, a mixing and stirring mechanism is interspersed in the support frame and the interior of the mixing tank, and the mixing and stirring mechanism is composed of a stirring motor, a driving shaft, an intermediate transmission component, a stirring shaft, a spiral stirring blade and a plurality of horizontal stirring blades, the stirring motor is fixedly connected to the middle position of the top of the supporting frame, the driving shaft is fixedly connected to the output shaft of the stirring motor, the stirring shaft is rotatably connected to the interior of the mixing tank, and the intermediate transmission component is connected between the driving shaft and the stirring shaft. The spiral stirring blades and the horizontal stirring blades are both fixedly connected to the side of the stirring shaft. The intermediate transmission assembly is composed of a positioning guide sleeve, a sliding connection sleeve, a flat shaft and a positioning arm. The positioning guide sleeve is inserted into the center position of the cover plate and fixedly connected thereto. An annular guide track is provided on the inner wall of the positioning guide sleeve. The sliding connection sleeve is located at the center position inside the positioning guide sleeve. The positioning arm is fixedly connected to the bottom end of one side of the sliding connection sleeve and inserted into the annular guide track. A flat groove is provided at the top end of the sliding connection sleeve. The flat shaft slides and inserts into the inside of the flat groove. The stirring shaft is inserted and connected to the bottom end of the sliding connection sleeve, and the drive shaft is inserted and connected to the top end of the flat shaft.

[0006] Preferably, one end of the outer surface of the positioning arm is rotatably provided with a limiting roller located inside the annular guide track, and the end of the positioning arm away from the sliding connection sleeve is rotatably provided with a limiting ball that is fitted and connected to the inner wall of the annular guide track.

[0007] Preferably, the driving shaft and the flat shaft, and the stirring shaft and the sliding connection sleeve are fixedly connected by a plurality of bolts.

[0008] Preferably, a plurality of supporting legs are fixedly provided at the bottom end of the side of the mixing tank, and a feed hopper is fixedly provided at the top end of the side of the mixing tank.

[0009] Preferably, a discharge port is fixedly provided at the bottom end of the mixing tank, and a valve is provided on the discharge port.

[0010] Preferably, it also includes an insulating sleeve with an insulating sleeve refrigerant delivery channel in the wall, a condensing sleeve mounted on the outside of the insulating sleeve and a rotating sleeve mounted on the outside of the condensing sleeve, a condensing sleeve refrigerant delivery channel surrounding the outside of the insulating sleeve is formed between the condensing sleeve and the insulating sleeve, the lower end of the condensing sleeve is connected to the inner circumference of the positioning guide sleeve through a bottom plate to form a condensate collecting groove, the condensate collecting groove is provided with a condensate discharge channel, the upper end of the condensing sleeve refrigerant delivery channel is connected to the upper end of the insulating sleeve refrigerant delivery channel, the lower end of the condensing sleeve refrigerant delivery channel is provided with a condensing sleeve refrigerant delivery pipe, and the insulating sleeve refrigerant The lower end of the refrigerant delivery channel is provided with an insulating sleeve refrigerant delivery pipe, the insulating sleeve is arranged on the flat shaft, the upper end of the rotating sleeve is sealed and connected with the stirring shaft, a condensation space is formed between the rotating sleeve and the condensation sleeve, the support frame is a cylindrical structure, a sealed cavity is formed between the support frame and the cover plate, the upper end of the rotating sleeve is provided with an air flow inlet connected to the sealed cavity, the lower end of the rotating sleeve is provided with an air flow outlet connected to the sealed cavity, a plurality of connecting holes connecting the mixing tank and the sealed cavity are pierced on the cover plate, a condensation space is formed between the condensation sleeve and the rotating sleeve, and a fan blade driving the air flow from the air flow inlet into the condensation space is provided on the inner circumference of the rotating sleeve. When stirring, the air flow in the mixing tank enters the condensation space of the sealed cavity, and the water vapor is condensed, and then output from the right outlet to the sealed cavity and enters the mixing tank, thereby dehumidifying the air on the surface of the concrete in the mixing tank from top to bottom. Thereby, the quality of concrete is improved. The second invention purpose is achieved.

[0011] Preferably, the condensing jacket refrigerant delivery pipe is used to input refrigerant into the condensing jacket refrigerant delivery channel, and the insulating jacket refrigerant delivery pipe is used to output refrigerant from the insulating jacket refrigerant delivery channel. This can make the temperature difference between the airflow in the up-down direction of the condensing channel and the refrigerant in the up-down direction of the condensing jacket refrigerant delivery channel substantially the same, and the refrigerant is firstly cooled and then flows out, thereby improving the condensation efficiency and the utilization rate of the cooling capacity.

[0012] Preferably, it also includes a wiper sleeve driving structure, the condensation sleeve is provided with a wiper sleeve for scraping off the condensed water on the condensation sleeve, the outer peripheral surface of the wiper sleeve is a conical surface with a small upper end and a large lower end, and the wiper sleeve driving structure is used to drive the wiper sleeve to rise and fall on the condensation sleeve, and the rising speed of the wiper sleeve is one fifteenth of the descending speed. Scraping off the condensed water on the condensation sleeve can make the heat exchange between the airflow and the condensation sleeve more complete, which plays a role in improving the condensation effect. Scraping slowly from the top and quickly from the bottom is aimed at completing the main process of scraping off the condensed water when scraping upwards. The advantage of scraping off the condensed water upwards is that the scraped condensed water will not form accumulation on the condensed water that has not been scraped off, and the accumulation will reduce the heat exchange effect.

[0013] Preferably, the wiper sleeve driving structure comprises a wiper sleeve driving rod with one end connected to the wiper sleeve and a plurality of ascending driving grooves and a plurality of descending driving grooves arranged on the inner circumferential surface of the rotating sleeve and arranged at intervals along the circumferential direction of the stirring shaft, wherein the ascending driving groove and the descending driving groove are sequentially connected end to end to form an annular driving rod driving groove of a broken line structure, and the other end of the wiper sleeve driving rod is inserted into the driving rod driving groove. The driving of the scraper sleeve to rise and fall is realized by the stirring motor.

[0014] Preferably, the mixing tank is provided with an air storage space located above the concrete in the mixing tank, and all the communicating holes are provided with exhaust pipes in some of the communicating holes and air inlet pipes in the remaining communicating holes, the upper end of the exhaust pipe is located at the upper end of the sealed cavity and the lower end is located at the upper end of the air storage space, the upper end of the air inlet pipe is located at the lower end of the sealed cavity and the lower end is located at the lower end of the air storage tank, so as to achieve the orderliness of the input and output of the airflow in the mixing tank.

[0015] The present invention has the following advantages: During operation, by setting a mixing and stirring mechanism composed of a stirring motor, a driving shaft, an intermediate transmission component, a stirring shaft, a spiral stirring blade and a plurality of horizontal stirring blades, the self-compacting concrete can be mixed and stirred. During the mixing process, the concrete can be turned over to improve the mixing uniformity. By setting an intermediate transmission component composed of a positioning guide sleeve, a sliding connection sleeve, a flat shaft and a positioning arm, the stirring shaft, the spiral stirring blade and the horizontal stirring blade can be driven to be raised and lowered during the rotation process, thereby further improving the mixing uniformity and mixing efficiency of the self-compacting concrete. By setting a limiting roller and a limiting ball, the friction between the positioning arm and the annular guide track can be reduced, the mobility can be improved, and the service life can be increased. By setting a feed hopper, the raw materials of each component can be put into the mixing tank, and by setting a discharge port and a valve, the evenly mixed self-compacting concrete can be discharged; Capable of dehumidifying concrete surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of embodiment 1; Figure 2 It is a schematic diagram of the connection structure between the mixing tank and the mixing and stirring mechanism; Figure 3 It is a schematic diagram of the structure of the mixing and stirring mechanism; Figure 4 It is a schematic diagram of the structure of the intermediate transmission component; Figure 5 for Figure 4 A partial enlarged view of Figure 6 It is a schematic diagram of the positioning guide sleeve structure; Figure 7 It is a partial schematic diagram of the second embodiment; Figure 8 for Figure 7 A local enlarged schematic diagram of point A; Fig. 9 for Figure 7 A local enlarged schematic diagram of point B; Fig.10 Schematic diagram of the expansion of the rotating sleeve.

[0017] In the figure: mixing tank 1, cover plate 2, support frame 3, mixing and stirring mechanism 4, stirring motor 5, drive shaft 6, intermediate transmission component 7, stirring shaft 8, spiral stirring blade 9, horizontal stirring blade 10, positioning guide sleeve 11, sliding connection sleeve 12, flat shaft 13, positioning arm 14, annular guide track 15, flat groove 16, limiting roller 17, limiting ball 18, bolt 19, support leg 20, feed hopper 21, discharge port 22, valve 23, insulation sleeve refrigerant delivery channel 24, insulation sleeve 25, condensation Sleeve 26, rotating sleeve 27, condensing sleeve refrigerant delivery channel 28, bottom plate 29, condensed water collecting tank 30, condensed water discharge channel 31, through hole 32, condensing sleeve refrigerant delivery pipe 33, insulating sleeve refrigerant delivery pipe 34, condensation space 35, sealing cavity 36, air flow inlet 37, air flow outlet 38, fan blade 39, wiper sleeve drive structure 40, wiper sleeve 41, wiper sleeve drive rod 42, rising drive groove 43 and, descending drive groove 44, drive rod drive groove 45, exhaust pipe 46, intake pipe 47. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1, see Figures 1 to 6A self-compacting concrete component mixing device comprises a mixing tank 1, a cover plate 2 is arranged at the top of the mixing tank 1, a support frame 3 is fixedly arranged at the top of the cover plate 2, a mixing and stirring mechanism 4 is interspersed between the support frame 3 and the mixing tank 1, and the mixing and stirring mechanism 4 is composed of a stirring motor 5, a driving shaft 6, an intermediate transmission component 7, a stirring shaft 8, a spiral stirring blade 9 and a plurality of horizontal stirring blades 10. The stirring motor 5 is fixedly connected to the middle position of the top of the support frame 3, the driving shaft 6 is fixedly connected to the output shaft of the stirring motor 5, the stirring shaft 8 is rotatably connected to the inside of the mixing tank 1, the intermediate transmission component 7 is connected between the driving shaft 6 and the stirring shaft 8, and the spiral stirring blade 9 and the horizontal stirring blade 10 are fixedly connected. Connected to the side of the stirring shaft 8, the intermediate transmission assembly 7 is composed of a positioning guide sleeve 11, a sliding connection sleeve 12, a flat shaft 13 and a positioning arm 14. The positioning guide sleeve 11 is inserted in the center position of the cover plate 2 and fixedly connected thereto. An annular guide track 15 is provided on the inner wall of the positioning guide sleeve 11. The sliding connection sleeve 12 is located at the center position inside the positioning guide sleeve 11. The positioning arm 14 is fixedly connected to the bottom end of one side of the sliding connection sleeve 12 and inserted in the annular guide track 15. A flat groove 16 is provided at the top end inside the sliding connection sleeve 12. The flat shaft 13 is slidably inserted in the flat groove 16. The stirring shaft 8 is inserted and connected to the bottom end of the sliding connection sleeve 12, and the drive shaft 6 is inserted and connected to the top end of the flat shaft 13. When in use, the stirring motor 5 drives the driving shaft 6, the intermediate transmission component 7 and the stirring shaft 8 to rotate, thereby driving the spiral stirring blade 9 and the horizontal stirring blade 10 to rotate synchronously, the horizontal stirring blade 10 realizes the main stirring work, and the spiral stirring blade 9 realizes the turning operation, thereby improving the uniformity of mixing and stirring. During the stirring process, the flat shaft 13 rotates following the driving shaft 6, and the flat shaft 13 drives the sliding connection sleeve 12 to rotate, and the positioning arm 14 moves along the annular guide track 15. Since each point of the annular guide track 15 has a different height, the positioning arm 14 can be lifted and lowered. Since the sliding connection sleeve 12 is slidably connected to the flat shaft 13, the sliding connection sleeve 12 is driven to lift and lower, thereby driving the stirring shaft 8, the spiral stirring blade 9 and the horizontal stirring blade 10 to lift and lower synchronously, and fully stirring and mixing work is achieved; Depend on Figures 4 to 6 It is given that one end of the outer surface of the positioning arm 14 is rotatably provided with a limiting roller 17 located inside the annular guide track 15, and one end of the positioning arm 14 away from the sliding connection sleeve 12 is rotatably provided with a limiting ball 18 that is closely connected to the inner wall of the annular guide track 15, and the driving shaft 6 and the flat shaft 13, and the stirring shaft 8 and the sliding connection sleeve 12 are fixedly connected by a plurality of bolts 19; The limiting roller 17 and the limiting ball 18 can improve the mobility of the connection between the positioning arm 14 and the annular guide track 15, and at the same time form a limiting effect, thereby reducing friction and improving stability and service life; Depend on Figure 1 It is shown that a plurality of supporting legs 20 are fixedly provided at the bottom end of the side of the mixing tank 1, a feed hopper 21 is fixedly provided at the top end of the side of the mixing tank 1, a discharge port 22 is fixedly provided at the bottom end of the mixing tank 1, and a valve 23 is provided on the discharge port 22; The feed hopper 21 can be used to feed raw materials, and the discharge port 22 and the valve 23 can be used to discharge the self-compacting concrete that has been produced.

[0020] During operation, by setting a mixing and stirring mechanism composed of a stirring motor, a driving shaft, an intermediate transmission component, a stirring shaft, a spiral stirring blade and a plurality of horizontal stirring blades, the self-compacting concrete can be mixed and stirred. During the mixing process, the concrete can be turned over to improve the mixing uniformity. By setting an intermediate transmission component composed of a positioning guide sleeve, a sliding connection sleeve, a flat shaft and a positioning arm, the stirring shaft, the spiral stirring blade and the horizontal stirring blade can be driven to be raised and lowered during the rotation process, thereby further improving the mixing uniformity and mixing efficiency of the self-compacting concrete. By setting a limiting roller and a limiting ball, the friction between the positioning arm and the annular guide track can be reduced, the mobility can be improved, and the service life can be increased. By setting a feed hopper, the raw materials of each component can be put into the interior of the mixing tank. By setting a discharge port and a valve, the evenly mixed self-compacting concrete can be discharged.

[0021] Embodiment 2 is different from Embodiment 1 in that: See also Figures 7 to 10, and also includes an insulating sleeve 25 with an insulating sleeve refrigerant delivery channel 24 in the wall, a condensing sleeve 26 sleeved on the outside of the insulating sleeve, and a rotating sleeve 27 sleeved on the outside of the condensing sleeve. A condensing sleeve refrigerant delivery channel 28 surrounding the outside of the insulating sleeve is formed between the condensing sleeve and the insulating sleeve. The lower end of the condensing sleeve is connected to the inner circumference of the positioning guide sleeve through a bottom plate 29 to form a condensate collecting groove 30. The condensate collecting groove is provided with a condensate discharge channel 31. The upper end of the condensing sleeve refrigerant delivery channel is connected to the upper end of the insulating sleeve refrigerant delivery channel through a through hole 32. The lower end of the condensing sleeve refrigerant delivery channel is provided with a condensing sleeve refrigerant delivery channel. The lower end of the refrigerant delivery channel of the heat-insulating sleeve is provided with a refrigerant delivery pipe 34 of the heat-insulating sleeve. The heat-insulating sleeve is arranged on the flat shaft. The upper end of the rotating sleeve is sealed and connected with the stirring shaft. A condensation space 35 is formed between the rotating sleeve and the condensation sleeve. The support frame is a cylindrical structure. A sealed cavity 36 is formed between the support frame and the cover plate. The upper end of the rotating sleeve is provided with an airflow inlet 37 connected with the sealed cavity. The lower end of the rotating sleeve is provided with an airflow outlet 38 connected with the sealed cavity. The cover plate is provided with a number of connecting holes connecting the mixing tank and the sealed cavity. The inner circumference of the rotating sleeve is provided with a fan blade 39 for driving the airflow from the airflow inlet into the condensation space. When stirring, the airflow in the mixing tank enters the condensation space of the sealed cavity and the water vapor is condensed, and then output from the right outlet to the sealed cavity and enters the mixing tank, thereby dehumidifying the air on the surface of the concrete in the mixing tank from top to bottom. Thereby, the quality of concrete is improved.

[0022] When in use, the refrigerant is fed into the refrigerant delivery channel of the condensing sleeve from the refrigerant delivery pipe of the condensing sleeve, flows through the refrigerant delivery channel of the heat insulating sleeve and then is output from the refrigerant delivery pipe of the heat insulating sleeve. It also includes a wiper sleeve driving structure 40, and a wiper sleeve 41 is provided on the condensing sleeve to scrape off the condensed water on the condensing sleeve. The outer peripheral surface of the wiper sleeve is a conical surface with a small upper end and a large lower end. The wiper sleeve driving structure is used to drive the wiper sleeve to rise and fall on the condensing sleeve, and the rising speed of the wiper sleeve is one-fifteenth of the falling speed. The wiper sleeve driving structure includes a wiper sleeve driving rod 42 connected to the wiper sleeve at one end, and a plurality of rising driving grooves 43 and a plurality of descending driving grooves 44 arranged on the inner peripheral surface of the rotating sleeve and arranged at intervals along the circumference of the stirring shaft. The rising driving groove and the descending driving groove are connected end to end in sequence to form a ring-shaped driving rod driving groove 45 of a broken line structure, and the other end of the wiper sleeve driving rod is inserted into the driving rod driving groove. The mixing tank is provided with an air storage space located above the concrete in the mixing tank. All the communicating holes include exhaust pipes 46 passed through some of the communicating holes and air inlet pipes 47 passed through the remaining communicating holes. The upper end of the exhaust pipe is located at the upper end of the sealed cavity and the lower end is located at the upper end of the air storage space. The upper end of the air inlet pipe is located at the lower end of the sealed cavity and the lower end is located at the lower end of the air storage tank.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concrete mixing device, comprising a mixing tank, characterized in that: The top of the mixing tank is provided with a cover plate, the top of the cover plate is fixedly provided with a support frame, the support frame and the mixing tank are interspersed with a mixing and stirring mechanism, the mixing and stirring mechanism is composed of a stirring motor, a driving shaft, an intermediate transmission assembly, a stirring shaft, a spiral stirring blade and a plurality of horizontal stirring blades, the stirring motor is fixedly connected to the middle position of the top of the support frame, the driving shaft is fixedly connected to the output shaft of the stirring motor, the stirring shaft is rotatably connected to the inside of the mixing tank, the intermediate transmission assembly is connected between the driving shaft and the stirring shaft, the spiral stirring blade and the horizontal stirring blade are both fixedly connected to the side of the stirring shaft, the intermediate transmission assembly is composed of a positioning guide sleeve, a sliding connection sleeve, a flat shaft and a positioning arm, the positioning guide sleeve is interspersed in the center position of the cover plate and fixedly connected thereto, an annular guide track is provided on the inner side wall of the positioning guide sleeve, the sliding connection sleeve is located at the center position inside the positioning guide sleeve, the positioning arm is fixedly connected to the bottom end of one side of the sliding connection sleeve and interspersed in the annular guide track, a flat groove is provided at the top inside the sliding connection sleeve, the flat shaft slides and intersperses in the inside of the flat groove, the stirring shaft is interspersed and connected to the bottom end of the sliding connection sleeve, and the driving shaft is interspersed and connected to the top of the flat shaft.

2. A concrete mixing device according to claim 1, characterized in that: One end of the outer surface of the positioning arm is rotatably provided with a limiting roller located inside the annular guide track, and one end of the positioning arm away from the sliding connection sleeve is rotatably provided with a limiting ball that is closely connected to the inner wall of the annular guide track.

3. A concrete mixing device according to claim 1, characterized in that: The driving shaft and the flat shaft, and the stirring shaft and the sliding connection sleeve are all fixedly connected by a plurality of bolts.

4. A concrete mixing device according to claim 1, characterized in that: A plurality of supporting legs are fixedly arranged at the bottom end of the side of the mixing tank, and a feeding hopper is fixedly arranged at the top end of the side of the mixing tank.

5. A concrete mixing device according to claim 1, characterized in that: The bottom end of the mixing tank is fixedly provided with a discharge port, and a valve is arranged on the discharge port.

6. A concrete mixing device according to claim 1, characterized in that: The condensing sleeve and the insulating sleeve are provided with a refrigerant conveying channel of the insulating sleeve in the wall, a condensing sleeve sleeved on the outside of the insulating sleeve and a rotating sleeve sleeved on the outside of the condensing sleeve, a refrigerant conveying channel of the condensing sleeve surrounding the outside of the insulating sleeve is formed between the condensing sleeve and the insulating sleeve, the lower end of the condensing sleeve is connected to the inner circumference of the positioning guide sleeve through the bottom plate to form a condensate collecting groove, the condensate collecting groove is provided with a condensate discharge channel, the upper end of the refrigerant conveying channel of the condensing sleeve is connected with the upper end of the refrigerant conveying channel of the insulating sleeve, and the lower end of the refrigerant conveying channel of the condensing sleeve is provided with a refrigerant conveying pipe of the condensing sleeve. An insulating sleeve refrigerant delivery pipe is provided at the lower end of the insulating sleeve refrigerant delivery channel, the insulating sleeve is arranged on the flat shaft, the upper end of the rotating sleeve is sealed and connected with the stirring shaft, a condensation space is formed between the rotating sleeve and the condensation sleeve, the support frame is a cylindrical structure, a sealed cavity is formed between the support frame and the cover plate, an air flow inlet connected to the sealed cavity is provided at the upper end of the rotating sleeve, an air flow outlet connected to the sealed cavity is provided at the lower end of the rotating sleeve, a plurality of connecting holes connecting the mixing tank and the sealed cavity are pierced on the cover plate, and a fan blade for driving the air flow from the air flow inlet into the condensation space is provided on the inner circumference of the rotating sleeve.

7. A concrete mixing device according to claim 6, characterized in that: The refrigerant delivery pipe of the condensing jacket is used for inputting refrigerant into the refrigerant delivery channel of the condensing jacket, and the refrigerant delivery pipe of the heat-insulating jacket is used for outputting refrigerant from the refrigerant delivery channel of the heat-insulating jacket.

8. A concrete mixing device according to claim 6, characterized in that: It also includes a wiper sleeve driving structure, wherein a wiper sleeve is provided on the condensation sleeve for scraping off condensed water on the condensation sleeve, and the outer peripheral surface of the wiper sleeve is a conical surface with a small upper end and a large lower end. The wiper sleeve driving structure is used to drive the wiper sleeve to rise and fall on the condensation sleeve, and the rising speed of the wiper sleeve is one fifteenth of the descending speed.

9. A concrete mixing device according to claim 8, characterized in that: The wiper sleeve driving structure includes a wiper sleeve driving rod with one end connected to the wiper sleeve and a plurality of ascending driving grooves and a plurality of descending driving grooves arranged on the inner circumferential surface of the rotating sleeve and spaced apart along the circumferential direction of the stirring shaft. The ascending driving groove and the descending driving groove are connected end to end in sequence to form an annular driving rod driving groove with a broken line structure, and the other end of the wiper sleeve driving rod is inserted into the driving rod driving groove.

10. A concrete mixing device according to claim 6, characterized in that: The mixing tank is provided with an air storage space located above the concrete in the mixing tank, and all the communicating holes are provided with exhaust pipes in some of the communicating holes and air inlet pipes in the remaining communicating holes, the upper end of the exhaust pipe is located at the upper end of the sealed cavity and the lower end is located at the upper end of the air storage space, the upper end of the air inlet pipe is located at the lower end of the sealed cavity and the lower end is located at the lower end of the air storage tank.

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