CN221518291U - High-efficient mixer of concrete - Google Patents

Abstract

The application provides a concrete efficient mixer, and relates to the field of concrete mixing equipment. It comprises the following steps: including frame, outer jar, inner tank and mix material subassembly, outer jar is located in the frame, the inner tank is located in the outer jar, just be equipped with in the inner tank and be used for the splendid attire hold the chamber that holds of concrete raw materials, set up on the outer jar and lead to hold feed inlet and discharge gate in the chamber the outer wall of inner tank with be formed with the heat preservation chamber that is used for holding heat preservation medium between the inner wall of outer jar, mix the material subassembly including mixing material unit and drive arrangement, mix the material unit and locate hold the intracavity, drive arrangement with mix the material unit transmission and be connected and be suitable for the drive mix the material unit stirring the concrete raw materials. The application can mix concrete at low ambient temperature.

Description

High-efficient mixer of concrete

Technical Field

The application relates to the field of concrete stirring equipment, in particular to a concrete efficient stirrer.

Background

The concrete stirring equipment is used for uniformly stirring raw materials of concrete such as stone, sand, cement and the like and water to obtain concrete for pouring.

The prior concrete stirring equipment generally comprises a support frame, a stirring cylinder and a stirring rod, wherein the stirring cylinder is arranged on the support frame, a feed inlet for throwing concrete raw materials into the stirring cylinder is formed in the top of the stirring cylinder, and a discharge outlet is formed in the bottom of the stirring cylinder; one end of the stirring rod penetrates through a mounting hole formed in the top wall of the stirring barrel to stretch into the stirring barrel, a plurality of supporting rods are further arranged at the end of the stirring rod, the other end of the stirring rod is connected with a rotating motor, and the rotating motor can drive the stirring rod to rotate so as to drive the plurality of supporting rods to rotate around the stirring rod, so that concrete raw materials in the stirring barrel can be stirred through the cooperation of the plurality of supporting rods and the stirring rod.

However, when the ambient temperature is below zero, a part of water in the mixing cylinder is frozen on the surfaces of stones and sand to form frozen materials, and the mixing time of the mixing cylinder needs to be prolonged, so that heated cement can be fully contacted with the frozen materials and can be fully dissolved, the concrete can be fully mixed, and the efficiency of mixing the concrete is low.

In view of this, it is desirable to provide a concrete mixer with high efficiency.

Disclosure of utility model

The application provides a concrete efficient mixer, which aims to solve the problem that when the ambient temperature is low, the efficiency of mixing concrete by concrete mixing equipment is low.

The application provides a concrete efficient mixer, which adopts the following technical scheme: including frame, outer jar, inner tank and mix material subassembly, outer jar is located in the frame, the inner tank is located in the outer jar, just be equipped with in the inner tank and be used for the splendid attire hold the chamber that holds of concrete raw materials, set up on the outer jar and lead to hold feed inlet and discharge gate in the chamber the outer wall of inner tank with be formed with the heat preservation chamber that is used for holding heat preservation medium between the inner wall of outer jar, mix the material subassembly including mixing material unit and drive arrangement, mix the material unit and locate hold the intracavity, drive arrangement with mix the material unit transmission and be connected and be suitable for the drive mix the material unit stirring the concrete raw materials.

Through adopting above-mentioned technical scheme, when mixing concrete, the heat that cement and water reaction produced can be absorbed by the heat preservation medium in the heat preservation chamber and store for these heat can be stored in the heat preservation medium and be difficult for continuing to outwards jar conduction, thereby make the produced most heat of cement and water reaction all can be accumulated in inner tank and holding the chamber, and can not lose in outer tank and the outside environment, with can realizing the whole intensification to holding the material in the chamber in shorter time, not only make the water that holds the chamber be difficult for freezing at the surface of stone and sand and form the material that freezes, can be quick again with holding the material that freezes that has produced in the chamber and melt and open, make the workman need not to prolong the stirring time specially and melt thaw material, thereby can improve the efficiency of concrete mixing.

Specifically, the circulating heating device also comprises a circulating heating component, wherein the heat preservation medium is a liquid medium, the circulating heating component comprises a liquid outlet pipe, a liquid inlet pipe, a liquid storage tank, a heating device and an infusion pump, a liquid outlet which leads to the outside is formed in the position, close to the top, of the inner wall of the heat preservation cavity, one end of the liquid outlet pipe is connected with the liquid outlet, the other end of the liquid outlet pipe is connected with the liquid storage tank, the liquid medium in the heat preservation cavity can enter the liquid storage tank through the liquid outlet pipe, and the heating device is connected with the liquid storage tank and is suitable for heating the liquid medium in the liquid storage tank;

The liquid inlet to the external world is offered to the position department that is close to the bottom on the inner wall in heat preservation chamber, the one end of feed liquor pipe with the feed liquor mouth is connected, the other end of feed liquor pipe with the liquid outlet end of transfer pump is connected, the feed liquor end of transfer pump with the liquid storage pot is connected, just the transfer pump can with liquid medium in the liquid storage pot is via the feed liquor pipe input extremely in the heat preservation chamber.

Through adopting above-mentioned technical scheme, heating device can heat the liquid medium in the liquid storage pot, the transfer pump can with the feed liquor pipe cooperation with the liquid medium after being heated carry into the heat preservation chamber, and the lower liquid medium of temperature in the heat preservation chamber then can leave the heat preservation chamber from the liquid outlet, and get back into the liquid storage pot along the drain pipe, thereby can realize the circulation heating of liquid medium, so that a concrete high-efficient mixer can preheat inner tank and stone and sand in the inner tank before mixing concrete, avoid the production of freeze the material, and need not to wait for the reaction heat of cement and water to come thaw material, thereby can further improve the efficiency of concrete mixing.

Further, the circulating heating assembly further comprises a temperature sensor and a controller, wherein the temperature sensor is suitable for detecting the temperature in the accommodating cavity, the temperature sensor is electrically connected with the controller and is suitable for feeding back a detection result to the controller, and the controller is electrically connected with the heating device and is suitable for controlling the switch of the heating device according to the detection result.

By adopting the technical scheme, the temperature sensor can detect the temperature in the accommodating cavity in real time and feed back the detection result to the controller, and the controller can control the switch of the heating device according to the detection result, so that the heating device can be started when the temperature in the accommodating cavity is lower than a preset value, and the temperature in the accommodating cavity is improved; and after the temperature in the accommodating cavity reaches a preset value, the heating device is turned off, so that the condition that the concrete in the accommodating cavity is quickly solidified due to the fact that the temperature in the accommodating cavity is too high is avoided.

Specifically, mix the material unit and include the pivot and mix the material piece, the one end of pivot pass outer jar with the through-hole that sets up on the inner tank stretches into hold the chamber and with mix the material piece and be connected, drive arrangement with the other end of pivot is connected and is suitable for the drive the pivot is rotatory.

Through adopting above-mentioned technical scheme, drive arrangement can drive the pivot rotation to drive through the pivot and mix the material spare rotation, thereby can mix the concrete that holds the intracavity through pivoted mix the material spare.

Further, the material stirring piece is a spiral body, and a rotating shaft of the spiral body is arranged along the axial direction of the rotating shaft.

Through adopting above-mentioned technical scheme, the screw can be when driving the rotation of concrete raw materials around the pivot of screw, drive these concrete raw materials and remove along the axial direction of the pivot of screw to can drive these concrete raw materials and roll and mix, realize the quick stirring of concrete.

Further, the material stirring piece comprises a first material stirring plate and a second material stirring plate which are arranged along the axial direction of the rotating shaft, one side plate edge of the first material stirring plate is connected with the shaft body of the rotating shaft, an intersection angle is formed between the plate surface of the first material stirring plate and the horizontal plane, and when the rotating shaft rotates, the material facing side of the plate surface of the first material stirring plate can push the concrete raw material downwards;

The side of the second material mixing plate is connected with the shaft body of the rotating shaft, an intersection angle is formed between the plate surface of the second material mixing plate and the horizontal plane, and when the rotating shaft rotates, the material facing side of the plate surface of the second material mixing plate can push the concrete raw material upwards.

Through adopting above-mentioned technical scheme, when the pivot is rotatory, first stirring flitch can drive concrete raw materials and remove downwards, and the second is mixed the flitch and can be driven concrete raw materials and upwards remove to can drive these concrete raw materials and roll from top to bottom, mix, faster mix the even concrete.

Further, the stirring unit further comprises a mud blocking box and a driven shaft, an installation space is formed in the mud blocking box, one end, far away from the driving device, of the rotating shaft penetrates through a through hole formed in the mud blocking box to extend into the installation space, and a driving bevel gear is coaxially connected to the end of the rotating shaft;

The length direction of driven shaft is perpendicular to the length direction of pivot, the one end of driven shaft with the inner wall of inner tank rotates to be connected, the other end of driven shaft passes the through-hole of seting up on the fender mud box stretches into in the installation space, and this end department coaxial coupling has driven bevel gear, driven bevel gear with initiative bevel gear intermeshing, be located on the shaft body of driven shaft the part department of fender mud box outside is connected with driven stirring piece.

By adopting the technical scheme, the driving device can drive the rotating shaft to drive the stirring piece and the driving bevel gear to rotate, and the driving bevel gear can drive the driven bevel gear to drive the driven shaft and the driven stirring piece to rotate, so that the stirring piece and the driven stirring piece can be simultaneously driven to mix concrete through one driving device, and a plurality of driving devices are not required to be arranged, so that the cost of the concrete efficient mixer can be reduced; the mud baffle box can stop concrete raw materials such as stone, sand and cement in the accommodating cavity to make the driving bevel gear and the driven bevel gear difficult to contact with the concrete raw materials, avoid these gears to be worn out by the concrete raw materials fast, perhaps appear because the concrete solidifies between driving bevel gear and driven bevel gear, and lead to these gears to block dead condition.

Further, lip-shaped sealing rings are arranged between the through holes formed in the mud baffle box and the rotating shaft and between the through holes and the driven shaft, and sealing lips of the lip-shaped sealing rings face to a direction far away from the installation space.

Through adopting above-mentioned technical scheme, lip seal circle can seal the clearance between through-hole and pivot and the driven shaft of seting up on the fender mud box to make the concrete be difficult for entering into the fender mud box from these clearances, thereby can enough guarantee that initiative bevel gear and driven bevel gear can not contact with the concrete raw materials, just can not be worn and torn by the concrete raw materials fast yet, can guarantee again that the condition that the concrete solidification leads to these gears card dead can not appear between initiative bevel gear and the driven bevel gear.

In summary, the application has the following beneficial technical effects:

The concrete mixer comprises a frame, an outer tank, an inner tank and a mixing component, wherein the outer tank is arranged on the frame, the inner tank is arranged in the outer tank, a containing cavity for containing concrete raw materials is arranged in the inner tank, a feeding port and a discharging port which are communicated with the containing cavity are formed in the outer tank, a part of the mixing component is arranged in the containing cavity and is suitable for mixing the concrete raw materials, a heat preservation cavity for containing heat preservation media is formed between the outer wall of the inner tank and the inner wall of the outer tank, heat generated by cement and water reaction can be stored in the heat preservation media and is not easy to continue to conduct to the outer tank, so that most of heat generated by cement and water reaction can be accumulated in the inner tank and the containing cavity, and cannot be dissipated to the outer tank and the external environment, the overall temperature rise of materials in the containing cavity can be realized in a short time, water in the containing cavity is not easy to be frozen on the surfaces of stones and sand to form frozen materials, the frozen materials which are generated in the containing cavity can be quickly formed, workers can specially prolong the stirring time to achieve thaw materials, and accordingly, the concrete mixing efficiency can be improved.

Drawings

FIG. 1 is a perspective view of a concrete mixer of the present application;

FIG. 2 is a schematic cross-sectional view of an embodiment of the present application taken along a central axis of an outer tank;

FIG. 3 is a schematic cross-sectional view of another embodiment of the present application taken along a central axis of the outer tank;

FIG. 4 is a schematic enlarged view of area A of FIG. 3, showing the bevel gear and driven bevel gear;

fig. 5 is a schematic cross-sectional view taken along the direction B-B in fig. 3.

Reference numerals: 1. a frame; 2. an outer tank; 21. a feed cap; 22. a discharging baffle; 3. an inner tank; 4. a material mixing component; 41. a material mixing unit; 411. a rotating shaft; 4111. a driving bevel gear; 412. a material stirring piece; 4121. a first stirring plate; 4122. a second stirring plate; 413. a mud baffle box; 4131. a lip seal; 414. a driven shaft; 4141. a driven bevel gear; 4142. a driven stirring piece; 42. a driving device; 5. a circulating heating assembly; 51. a liquid outlet pipe; 52. a liquid inlet pipe; 53. a liquid storage tank; 54. an infusion pump.

Detailed Description

Fig. 1 is a perspective view of a concrete mixer according to the present application, and fig. 2 is a schematic cross-sectional view of an embodiment of the present application taken along a central axis of an outer tank. Referring to fig. 1 and 2, the present application provides a concrete mixer with high efficiency, comprising: the concrete mixer comprises a frame 1, an outer tank 2, an inner tank 3 and a mixing component 4, wherein the outer tank 2 is arranged on the frame 1, the inner tank 3 is arranged in the outer tank 2, a containing cavity for containing concrete raw materials is arranged in the inner tank 3, a feeding port and a discharging port which lead to the containing cavity are formed in the outer tank 2, a heat preservation cavity for containing heat preservation media is formed between the outer wall of the inner tank 3 and the inner wall of the outer tank 2, and the heat preservation media can be solid media such as rock wool or liquid media such as water; the material mixing assembly 4 comprises a material mixing unit 41 and a driving device 42, the material mixing unit 41 comprises a rotating shaft 411 and a material mixing piece 412, one end of the rotating shaft 411 penetrates through holes formed in the outer tank 2 and the inner tank 3, and extends into the accommodating cavity and is connected with the material mixing piece 412, the driving device 42 is connected with the other end of the rotating shaft 411, the driving device 42 can be a rotating motor, so that the rotating shaft 411 can be driven by the rotating motor to drive the material mixing piece 412 to rotate, and then concrete in the accommodating cavity is mixed by the rotating material mixing piece 412.

Through the design, when concrete is mixed, heat generated by cement and water reaction can be absorbed and stored by heat preservation media in the heat preservation cavity, so that the heat can be stored in the heat preservation media and is not easy to continuously conduct to the outer tank 2, most of heat generated by cement and water reaction can be accumulated in the inner tank 3 and the accommodating cavity and cannot be dissipated into the outer tank 2 and the external environment, the whole temperature rise of materials in the accommodating cavity can be realized in a short time, water in the accommodating cavity is not easy to freeze on the surfaces of stones and sand to form frozen materials, and the frozen materials generated in the accommodating cavity can be quickly melted and opened, so that a worker does not need to specially prolong the stirring time to melt thaw materials, and the mixing efficiency of the concrete can be improved.

Referring to fig. 1 and 2, a concrete high-efficiency mixer further includes a circulating heating assembly 5, the heat-insulating medium is a liquid medium, the liquid medium may be water-based antifreeze solution added with 40% of ethylene glycol, the circulating heating assembly 5 includes a liquid outlet pipe 51, a liquid inlet pipe 52, a liquid storage tank 53, a heating device (not shown in the figure) and an infusion pump 54, a liquid outlet opening to the outside is formed on the inner wall of the heat-insulating cavity near the top, one end of the liquid outlet pipe 51 is connected with the liquid outlet, the other end of the liquid outlet pipe 51 is connected with the liquid storage tank 53, the heating device may be provided as an electric heating wire, so that the antifreeze solution inside the liquid storage tank 53 can be heated by the electric heating wire; a liquid inlet is formed in the inner wall of the heat preservation cavity at a position close to the bottom, one end of the liquid inlet pipe 52 is connected with the liquid inlet, the other end of the liquid inlet pipe 52 is connected with the liquid outlet end of the liquid delivery pump 54, the liquid inlet end of the liquid delivery pump 54 is connected with the liquid storage tank 53, and the liquid delivery pump 54 can input liquid medium in the liquid storage tank 53 into the heat preservation cavity through the liquid inlet pipe 52.

Through the design, heating device can heat the antifreeze in the liquid storage tank 53, the transfer pump 54 can be with the feed liquor pipe 52 cooperation with the antifreeze after being heated carry into the bottom of heat preservation chamber, and the antifreeze that the temperature near the top of heat preservation chamber is lower then can leave the heat preservation chamber from the liquid outlet, and get back to in the liquid storage tank 53 along drain pipe 51, thereby can realize the circulation heating to the antifreeze, so that a concrete high-efficient mixer can preheat inner tank 3 and stone and sand in the inner tank 3 before mixing the concrete, avoid the production of freeze, and need not to wait for the heat of reaction of cement and water to change thaw material, thereby can further improve concrete mixing's efficiency.

Referring to fig. 1 and 2, the circulating heating assembly 5 further includes a temperature sensor and a controller (both not shown), the temperature sensor is disposed in the accommodating chamber and is electrically connected to the controller, the temperature sensor may employ an infrared temperature sensor to be capable of detecting the temperature in the accommodating chamber in real time and feeding back the detection result to the controller, and the controller may control the switch of the heating device according to the detection result to be capable of turning on the heating device when the temperature in the accommodating chamber is lower than a preset value (for example, 20 ℃), so as to increase the temperature in the accommodating chamber; and after the temperature in the accommodating cavity reaches a preset value, the heating device is turned off, so that the condition that the concrete in the accommodating cavity is quickly solidified due to the fact that the temperature in the accommodating cavity is too high is avoided.

Fig. 3 is a schematic cross-sectional view of another embodiment of the present application taken along the central axis of the outer can, and fig. 4 is a schematic enlarged view of region a in fig. 3, in which a bevel gear and a driven bevel gear are shown. Referring to fig. 3 and 4, the mixing unit 41 further includes a mud guard 413 and a driven shaft 414, an installation space is formed inside the mud guard 413, one end of the rotating shaft 411, which is far away from the driving device 42, extends into the installation space through a through hole formed in the mud guard 413, and a driving bevel gear 4111 is coaxially connected to the end; one end of the driven shaft 414 is rotationally connected with the inner wall of the inner tank 3, the other end of the driven shaft 414 penetrates through a through hole formed in the mud baffle box 413 to extend into the installation space, a driven bevel gear 4141 is coaxially connected to the end, the driven bevel gear 4141 is meshed with the driving bevel gear 4111, and a driven stirring piece 4142 is connected to the part, located outside the mud baffle box 413, of the shaft body of the driven shaft 414.

Through the design, the driving device 42 can drive the rotating shaft 411 to drive the mixing piece 412 and the driving bevel gear 4111 to rotate, and the driving bevel gear 4111 can drive the driven bevel gear 4141 to drive the driven shaft 414 and the driven mixing piece 4142 to rotate, so that the mixing piece 412 and the driven mixing piece 4142 can be simultaneously driven by one driving device 42 to mix concrete, and a plurality of driving devices 42 are not required to be arranged, so that the cost of the concrete high-efficiency mixer can be reduced; the mud guard 413 can block concrete raw materials such as stones, sand and cement in the accommodating cavity, so that the driving bevel gear 4111 and the driven bevel gear 4141 are not easy to contact with the concrete raw materials, and rapid abrasion of the gears by the concrete raw materials is avoided, or the situation that the gears are blocked due to solidification of concrete between the driving bevel gear 4111 and the driven bevel gear 4141 is avoided.

Preferably, the driven shafts 414 may be provided in two, the length direction of the first driven shaft 414 is perpendicular to the length direction of the rotating shaft 411, the driven bevel gear 4141 on the first driven shaft 414 is engaged with the driving bevel gear 4111, the length direction of the second driven shaft 414 is parallel to the length direction of the rotating shaft 411, and the driven bevel gear 4141 on the second driven shaft 414 is engaged with the driven bevel gear 4141 on the first driven shaft 414, so that concrete located in the lower half of the receiving cavity can be stirred through the second driven shaft 414.

Specifically, the lip seal 4131 may be disposed between the through hole formed in the mud-guard box 413 and the rotating shaft 411 and the driven shaft 414, and the sealing lips of the lip seal 4131 face the direction away from the installation space, so that the gaps between the through hole formed in the mud-guard box 413 and the rotating shaft 411 and the driven shaft 414 can be sealed by the lip seal 4131, so that concrete is not easy to enter into the mud-guard box 413 from the gaps, and therefore, the driving bevel gear 4111 and the driven bevel gear 4141 are not contacted with concrete raw materials, and are not worn rapidly by the concrete raw materials, and the situation that the gears are blocked due to concrete solidification between the driving bevel gear 4111 and the driven bevel gear 4141 is not guaranteed.

Referring to fig. 1 and 2, in one embodiment of the present application, the material stirring member 412 is a screw, and the rotating shaft of the screw is disposed along the axial direction of the rotating shaft 411, so as to drive the concrete raw materials to move along the axial direction of the rotating shaft of the screw while driving the concrete raw materials to rotate around the rotating shaft of the screw, so as to drive the concrete raw materials to roll and mix, thereby realizing rapid stirring of the concrete.

Fig. 5 is a schematic cross-sectional view taken along the direction B-B in fig. 3. Referring to fig. 3 and 5, in another embodiment provided by the present application, the mixing member 412 includes a first mixing plate 4121 and a second mixing plate 4122, where the plate surface of the first mixing plate 4121 and the plate surface of the second mixing plate 4122 are inclined to the horizontal plane, and one side plate edge of the first mixing plate 4121 is connected to the shaft body of the rotating shaft 411, and when the rotating shaft 411 rotates, the material facing side of the plate surface of the first mixing plate 4121 can push the concrete raw material downward; one side of the second mixing plate 4122 is connected to the shaft body of the rotating shaft 411, and when the rotating shaft 411 rotates, the material facing side of the plate surface of the second mixing plate 4122 can push the concrete raw material upwards.

Referring to fig. 3 and 5, a plurality of layers of mixing pieces 412 are disposed on the rotating shaft 411 from top to bottom, a plurality of layers of mixing pieces 412 are also disposed on the driven shaft 414 along the axial direction of the driven shaft, wherein the mixing pieces 412 of the odd layers are all disposed as first mixing plates 4121, the mixing pieces 412 of the even layers are all disposed as second mixing plates 4122, the first mixing plates 4121 and the second mixing plates 4122 of the adjacent two layers are staggered in the vertical direction, so that when the rotating shaft 411 and the driven shaft 414 rotate, the first mixing plates 4121 can drive concrete raw materials to move downwards, and the second mixing plates 4122 can drive the concrete raw materials to move upwards, so that the concrete raw materials can be driven to roll and mix up and down between the mixing plates of different layers, and the concrete can be mixed more quickly.

The working principle of the concrete efficient mixer in use is as follows:

The concrete mixer comprises a frame 1, an outer tank 2, an inner tank 3 and a mixing assembly 4, wherein the outer tank 2 is arranged on the frame 1, the inner tank 3 is arranged in the outer tank 2, a containing cavity for containing concrete raw materials is arranged in the inner tank 3, a feeding port and a discharging port which are communicated with the containing cavity are formed in the outer tank 2, a part of the mixing assembly 4 is arranged in the containing cavity and is suitable for mixing the concrete raw materials, a heat preservation cavity for containing heat preservation media is formed between the outer wall of the inner tank 3 and the inner wall of the outer tank 2, heat generated by cement and water reaction can be stored in the heat preservation media and cannot be conducted to the outer tank 2 continuously, so that most of heat generated by cement and water reaction can be accumulated in the inner tank 3 and the containing cavity, and cannot be dissipated to the outer tank 2 and the external environment, the whole heating of materials in the containing cavity can be realized in a short time, water in the containing cavity is not easy to freeze on the surfaces of stones and sand to form the materials, the materials can be quickly frozen, the materials which are generated in the containing cavity can be specially used for mixing the materials can be quickly prolonged, and the mixing efficiency of a worker can be improved thaw.

It should be noted that the above embodiments are all preferred embodiments of the present application, and the scope of the present application is not limited thereby: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (8)

1. The utility model provides a high-efficient mixer of concrete for mix concrete raw materials, its characterized in that: including frame (1), outer jar (2), inner tank (3) and mix material subassembly (4), outer jar (2) are located on frame (1), inner tank (3) are located in outer jar (2), just be equipped with in inner tank (3) and be used for the splendid attire hold the chamber of holding of concrete raw materials, set up on outer jar (2) and lead to feed inlet and discharge gate in holding the chamber inner tank (3) outer wall with be formed with the heat preservation chamber that is used for holding heat preservation medium between the inner wall of outer jar (2), mix material subassembly (4) including mix material unit (41) and drive arrangement (42), mix material unit (41) are located hold the intracavity, drive arrangement (42) with mix material unit (41) transmission and be connected and be suitable for the drive mix material unit (41) stirring the concrete raw materials.

2. A concrete mixer according to claim 1, the method is characterized in that: the circulating heating device comprises a liquid storage tank (53), and is characterized by further comprising a circulating heating component (5), wherein the heat preservation medium is a liquid medium, the circulating heating component (5) comprises a liquid outlet pipe (51), a liquid inlet pipe (52), a liquid storage tank (53), a heating device and a transfusion pump (54), a liquid outlet which is communicated with the outside is formed in the position, close to the top, on the inner wall of the heat preservation cavity, one end of the liquid outlet pipe (51) is connected with the liquid outlet, the other end of the liquid outlet pipe (51) is connected with the liquid storage tank (53), the liquid medium in the heat preservation cavity can enter the liquid storage tank (53) through the liquid outlet pipe (51), and the heating device is connected with the liquid storage tank (53) and is suitable for heating the liquid medium in the liquid storage tank (53);

The liquid inlet to the external world is arranged at a position, close to the bottom, on the inner wall of the heat preservation cavity, one end of the liquid inlet pipe (52) is connected with the liquid inlet, the other end of the liquid inlet pipe (52) is connected with the liquid outlet end of the liquid delivery pump (54), the liquid inlet end of the liquid delivery pump (54) is connected with the liquid storage tank (53), and the liquid delivery pump (54) can input liquid medium in the liquid storage tank (53) into the heat preservation cavity through the liquid inlet pipe (52).

3. A concrete mixer according to claim 2, wherein: the circulating heating assembly (5) further comprises a temperature sensor and a controller, wherein the temperature sensor is suitable for detecting the temperature in the accommodating cavity, the temperature sensor is electrically connected with the controller and is suitable for feeding back a detection result to the controller, and the controller is electrically connected with the heating device and is suitable for controlling the switch of the heating device according to the detection result.

4. A concrete mixer according to claim 1, the method is characterized in that: the stirring unit (41) comprises a rotating shaft (411) and a stirring piece (412), one end of the rotating shaft (411) penetrates through the through holes formed in the outer tank (2) and the inner tank (3) to extend into the accommodating cavity and are connected with the stirring piece (412), and the driving device (42) is connected with the other end of the rotating shaft (411) and is suitable for driving the rotating shaft (411) to rotate.

5. A concrete mixer according to claim 4, the method is characterized in that: the stirring piece (412) is a spiral body, and the rotating shaft of the spiral body is arranged along the axial direction of the rotating shaft (411).

6. A concrete mixer according to claim 4, the method is characterized in that: the material stirring piece (412) comprises a first material stirring plate (4121) and a second material stirring plate (4122) which are arranged along the axial direction of the rotating shaft (411), one side plate edge of the first material stirring plate (4121) is connected with the shaft body of the rotating shaft (411), an intersection angle is formed between the plate surface of the first material stirring plate (4121) and the horizontal plane, and when the rotating shaft (411) rotates, the material facing side of the plate surface of the first material stirring plate (4121) can push the concrete raw material downwards;

One side of the second stirring plate (4122) is connected with the shaft body of the rotating shaft (411), an intersection angle is formed between the plate surface of the second stirring plate (4122) and the horizontal plane, and when the rotating shaft (411) rotates, the material facing side of the plate surface of the second stirring plate (4122) can push the concrete raw material upwards.

7. A concrete mixer according to claim 4, the method is characterized in that: the stirring unit (41) further comprises a mud blocking box (413) and a driven shaft (414), an installation space is formed in the mud blocking box (413), one end, far away from the driving device (42), of the rotating shaft (411) penetrates through a through hole formed in the mud blocking box (413) to extend into the installation space, and a driving bevel gear (4111) is coaxially connected to the end;

The length direction of driven shaft (414) is perpendicular to the length direction of pivot (411), the one end of driven shaft (414) with the inner wall rotation of inner tank (3) is connected, the other end of driven shaft (414) is passed through the through-hole of seting up on fender mud box (413) stretches into in the installation space, and in this end department coaxial coupling has driven bevel gear (4141), driven bevel gear (4141) with initiative bevel gear (4111) intermeshing, be located on the shaft body of driven shaft (414) the part department outside fender mud box (413) is connected with driven stirring piece (4142).

8. A concrete mixer according to claim 7, the method is characterized in that: lip-shaped sealing rings (4131) are arranged between the through holes formed in the mud baffle box (413) and the rotating shaft (411) and between the through holes and the driven shaft (414), and sealing lips of the lip-shaped sealing rings (4131) face away from the installation space.