Pre-carbonized concrete stirring device

Abstract

The utility model provides a pre-carbonized concrete stirring device. According to the pre-carbonized concrete stirring device disclosed by the utility model, by utilizing the split detachable design of the tank body and the cover plate and combining the lifting mechanism, compared with the conventional integrated design of the tank body and the cover plate, the pre-carbonized concrete stirring device not only is convenient for feeding and taking materials, but also is convenient for cleaning the interior of the tank body; according to the pre-carbonized concrete stirring device, the fastening piece is arranged on the cover plate, and the gap is formed between the fastening piece and the surface of the cover plate; when the cover plate covers the tank body, the rotating piece rotates, and the inclined surface of the rotating piece is clamped in the gap; the cover plate is clamped with the tank body and is screwed with the tank body, so that the combined sealing mode effectively improves the sealing efficiency; according to the utility model, the stirring paddle and the stirring shaft are connected in a clamping manner, such as a buckling manner, so that different types of stirring paddles can be conveniently replaced, disassembled and assembled through the buckling manner; according to the utility model, the aim of stirring in different CO2 pressure environments is fulfilled by utilizing a mechanical sealing rotating shaft.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of concrete carbonation maintenance, especially relates to a pre-carbonated concrete mixing device. BACKGROUND

[0002] The traditional carbonation maintenance process needs to place the formed concrete in a sealed high-pressure reaction kettle to inject CO2, which has the problems of slow carbonation reaction rate, low CO2 capture efficiency, high energy consumption and the like. In comparison, the pre-carbonated fresh concrete technology realizes the effective utilization and sequestration of CO2 by simultaneously carrying out the carbonation reaction in the concrete mixing stage, has the potential of shortening the setting time, improving the frost resistance and reducing carbon emissions. More importantly, the pre-carbonation technology modifies and improves the material performance and solidifies the pollutants, efficiently converts the solid waste into low-carbon high-value components of concrete, significantly improves the performance and environmental benefits of the solid waste material, and provides an effective way for the high-value utilization of industrial solid waste and the carbon reduction of the concrete industry.

[0003] In the prior art, the pre-carbonated fresh concrete mixing device has the problems of complicated feeding and discharging, and difficult cleaning of the inside of the tank, and it is necessary to improve the existing pre-carbonated fresh concrete mixing device. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a pre-carbonated concrete mixing device to solve or at least partially solve the technical problems in the prior art.

[0005] In a first aspect, the utility model provides a pre-carbonated concrete mixing device, which comprises:

[0006] A tank body is provided with a stirring mechanism inside;

[0007] A cover plate is provided with a CO2 inlet pipe and a vacuum pipe; the CO2 inlet pipe is in communication with a CO2 cylinder and is used for introducing CO2 into the tank body; the cover plate is screwed on the tank body, and a sealing ring is arranged at the connection between the cover plate and the tank body;

[0008] A lifting mechanism is used for lifting the cover plate to cover the tank body or taking the cover plate out of the tank body.

[0009] Preferably, an annular plate is arranged around the tank body port;

[0010] Screw holes are arranged at corresponding positions on the cover plate and the annular plate, and a screwing piece is screwed into the screw holes to cover the cover plate on the tank body port; a sealing ring is arranged at the connection between the cover plate and the tank body port.

[0011] Preferably, a rotatable piece is arranged on the annular plate, and the upper end surface of the rotatable piece is an inclined surface inclined downward;

[0012] The cover plate is provided with a fastener, and a gap is formed between the fastener and the surface of the cover plate.

[0013] When the cover plate is closed on the tank body, the rotating member is rotated, and the inclined surface of the rotating member is clamped in the gap.

[0014] Preferably, the lifting mechanism comprises:

[0015] a support;

[0016] a first lifting member provided on the cover plate;

[0017] a second lifting member provided on the support;

[0018] a cable, one end of which is connected to the first lifting member, and the other end of which passes through the second lifting member and is connected to a driving member;

[0019] The driving member is used to drive the cover plate to move up and down in the vertical direction.

[0020] Preferably, the stirring mechanism comprises:

[0021] a stirring motor located on the cover plate;

[0022] a stirring shaft located in the tank body, an upper end of which passes through the cover plate and is connected to a rotating shaft of the stirring motor;

[0023] a stirring paddle located in the tank body, the stirring paddle being connected to the stirring shaft.

[0024] Preferably, the stirring mechanism further comprises:

[0025] a speed reducer located on the cover plate, a rotating shaft of the stirring motor being connected to the speed reducer;

[0026] a mechanical seal rotating shaft, an upper end of which is connected to a rotating shaft of the speed reducer, and a lower end of which passes through the cover plate and is connected to the stirring shaft;

[0027] The stirring motor is rotated to drive the speed reducer to rotate the stirring shaft.

[0028] The stirring paddle is clamped with the stirring shaft.

[0029] Preferably, the cover plate is provided with a pressure gauge.

[0030] The cover plate is provided with a safety pressure relief pipe, and the safety pressure relief pipe is provided with a pressure relief valve.

[0031] Preferably, the stirring mechanism further comprises a base.

[0032] The support is located on the base.

[0033] The base is provided with two positioning blocks, and a positioning groove is formed between the two positioning blocks; the lower end of the tank body is provided with a positioning protrusion corresponding to the positioning groove, and the positioning protrusion is located in the positioning groove.

[0034] Preferably, the base is further provided with a tank body support plate on both sides of the tank body.

[0035] A rotating rod is rotatably arranged on the tank body support plate, one end of the rotating rod away from the tank body support plate is connected with the tank body, and the rotating rod rotates to drive the tank body to rotate.

[0036] A bolt sequentially passes through the positioning block and the positioning protrusion to fix the tank body.

[0037] Preferably, the cover plate is further provided with a transparent observation window.

[0038] The CO2 inlet pipe is provided with an inlet valve.

[0039] The vacuum pipe is provided with an exhaust valve.

[0040] The pre-carbonized concrete mixing device has the following beneficial effects compared with the prior art:

[0041] 1. The pre-carbonized concrete mixing device utilizes the detachable design of the tank body and the cover plate in combination with the lifting mechanism, compared with the conventional tank body and cover plate integrated design, not only facilitates the feeding and taking of materials, but also facilitates the cleaning of the inside of the tank body.

[0042] 2. The pre-carbonized concrete mixing device is provided with a fastener on the cover plate, and a gap is formed between the fastener and the surface of the cover plate; when the cover plate is closed on the tank body, the rotating part rotates, and the inclined surface of the rotating part is clamped in the gap; the clamping mode between the cover plate and the tank body in combination with the screwing of the cover plate and the tank body effectively improves the sealing efficiency.

[0043] 3. The pre-carbonized concrete mixing device is clamped between the stirring paddle and the stirring shaft, for example, a buckle type connection, which facilitates the replacement and disassembly of different types of stirring paddles through the buckle type quick connection.

[0044] 4. The pre-carbonized concrete mixing device is provided with a rotating rod rotatably arranged on the tank body support plate, one end of the rotating rod away from the tank body support plate is connected with the tank body, and the rotating rod rotates to drive the tank body to rotate; a bolt sequentially passes through the positioning block and the positioning protrusion to fix the tank body; during the carbonization process, the positioning protrusion is located in the positioning groove, and the bolt sequentially passes through the positioning block and the positioning protrusion to fix the tank body, so that the tank body does not shake during the stirring process; after the carbonization is completed, the screwing part is unscrewed from the screw hole, and then the cover plate is lifted by the lifting mechanism to separate the cover plate from the tank body, and then the bolt is taken out, which facilitates the rotation of the tank body to pour out the carbonized product.

[0045] 5、The pre-carbonized concrete mixing device of the utility model, the mixing shaft upper end passes through the cover plate and is connected with the rotating shaft of the speed reducer through the mechanical seal rotating shaft, utilizes the mechanical seal rotating shaft, can realize the purpose of mixing under vacuum or different CO2 gas pressure in the mixing process. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, below will be to the embodiment or prior art description needed to use the drawing a simple introduction. Obviously, the drawing in the following description is only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0047] Figure 1 It is the structure schematic view of the pre-carbonized concrete mixing device of the utility model;

[0048] Figure 2 It is the structure schematic view of another view of the pre-carbonized concrete mixing device of the utility model;

[0049] Figure 3 It is the structure schematic view of the cover plate of the utility model;

[0050] Figure 4 It is the structure schematic view of the mixing paddle of the utility model;

[0051] Figure 5 It is the structure schematic view of the tank body of the utility model;

[0052] Figure 6 It is the structure schematic view of another view of the tank body of the utility model;

[0053] Figure 7 It is the structure schematic view of the base and support of the utility model;

[0054] Figure 8 It is the structure schematic view of the base and support of the utility model; DETAILED DESCRIPTION

[0055] In order to make the purpose, technical scheme and advantage of the embodiments of the utility model more clear, below will be to the technical scheme in the embodiments of the utility model, clear, complete description is described with the drawings in the embodiments of the utility model. Obviously, the described embodiment is the part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawing here can be arranged and designed in various different configurations.

[0056] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based upon the embodiments of the application, all other embodiments obtained by persons of ordinary skill in the art without creative work are within the scope of the application.

[0057] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0058] In the description of the application, it should be understood that the orientation or position relationship indicated by such as "upper" is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly placed when the product of the application is used, or the orientation or position relationship commonly understood by those skilled in the art, and is only for the convenience of describing the application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0059] The technical solutions in the embodiments of the application will be described clearly and completely in conjunction with the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments of the application, all other embodiments obtained by persons of ordinary skill in the art without creative work are within the scope of the application.

[0060] The embodiment of the application provides a pre-carbonized concrete mixing device, as shown in the drawings, comprising: Figures 1-8

[0061] a tank body 1, which is internally provided with a stirring mechanism;

[0062] a cover plate 2, which is provided with a CO2 inlet pipe 21 and a vacuum pipe 22; the CO2 inlet pipe 21 is in communication with a CO2 cylinder and is used for introducing CO2 into the tank body 1; the cover plate 2 is screwed on the tank body 1, and a sealing ring 3 is arranged at the connection between the cover plate 2 and the tank body 1;

[0063] a lifting mechanism, which is used for lifting the cover plate 2 to cover the cover plate 2 on the tank body 1 or to take the cover plate 2 out of the tank body 1.

[0064] ​The utility model discloses a pre -carbonization concrete mixing device, including jar body 1, apron 2, jar body 1 upper end opening, apron 2 covers the upper end opening place of jar body 1, apron 2 is screwed on jar body 1, the connecting place of apron 2 and jar body 1 is equipped with sealing ring 3, and the sealed space is formed between apron 2 and jar body 1, and simultaneously, still be equipped with CO 2 inlet pipe 21 and vacuumizing pipe 22 on apron 2, CO 2 inlet pipe 21 is connected with CO 2 gas cylinder, and the CO 2 gas of a certain pressure is provided through CO 2 gas cylinder, and the CO 2 gas enters jar body 1 through CO 2 inlet pipe 21, simultaneously, before using, connect vacuumizing pipe 22 with vacuum pump, utilize vacuum pump to evacuate the air in jar body 1 to form vacuum environment, further, still include lifting mechanism, it is used to lift apron 2 to cover apron 2 on jar body 1 or take out apron 2 from jar body 1, the pre -carbonization concrete mixing device of the utility model uses lifting mechanism to make apron 2 separate with jar body 1 first, then adds concrete raw materials (water, solid waste powder, cement and the like raw materials) in jar body 1, then uses lifting mechanism to make apron 2 descend, makes apron 2 cover and screw and seal on jar body 1, then starts vacuum pump and evacuates jar body 1, again utilizes CO 2 inlet pipe 21 and imports the CO 2 gas of pre -set pressure in jar body 1, carries out stirring carbonization, after carbonization, utilizes lifting mechanism to make apron 2 ascend, makes apron 2 separate with jar body 1, takes out the product after carbonization in jar body 1, and washes jar body 1, the pre -carbonization concrete mixing device of the utility model utilizes the split detachable design of jar body 1, apron 2 and combines lifting mechanism, compared with the integrated design of conventional jar body 1, apron 2, not only is convenient for adding material, but also is convenient for the internal cleaning of jar body 1.

[0065] In some embodiments, the outer periphery of the port of the jar body 1 is sleeved with an annular plate 11;

[0066] Screw holes 10 are arranged on the apron 2 and the annular plate 11 at corresponding positions, and a screwing member is screwed into the screw holes 10 to cover the apron 2 on the port of the jar body 1. A sealing ring 3 is arranged at the connection between the apron 2 and the port of the jar body 1.

[0067] In the above embodiments, the outer periphery of the port of the jar body 1 is sleeved with an annular plate 11, that is, the upper end opening of the jar body 1 is sleeved with an annular plate 11. Screw holes 10 are arranged on the apron 2 and the annular plate 11 at corresponding positions, and a screwing member is screwed into the screw holes 10 to cover the apron 2 on the port of the jar body 1. A sealing ring 3 is arranged at the connection between the apron 2 and the port of the jar body 1. Specifically, the sealing ring can be arranged on the inner wall of the port of the jar body 1 to increase the sealing performance.

[0068] In some embodiments, the annular plate 11 is rotatably provided with a rotating member 12, and the upper end surface of the rotating member 12 is an inclined surface 13 inclined downward.

[0069] The cover plate 2 is provided with a fastener 23, and a gap 27 is formed between the fastener 23 and the surface of the cover plate 2.

[0070] When the cover plate 2 is covered on the tank body 1, the rotating member 12 is rotated, and the inclined surface 13 of the rotating member 12 is clamped in the gap 27.

[0071] In the above embodiment, the annular plate 11 is provided with a rotating shaft, and the rotating member 12 can rotate around the rotating shaft; the cover plate 2 is provided with the fastener 23, the fastener 23 is in L shape, and the fastener 23 includes a horizontal part and a vertical part, the vertical part is located on the cover plate 2, the horizontal part is connected with the vertical part, and the gap 27 is formed between the horizontal part and the surface of the cover plate 2; before use, the rotating member 12 is rotated to avoid interference between the rotating member 12 and the cover plate 2, so that the cover plate 2 is covered on the tank body 1, at this time, the cover plate 2 is located at the same position as the screw hole 10 on the annular plate 11, then the inclined surface 13 of the rotating member 12 is clamped in the gap 27, so that the cover plate 2 is clamped with the tank body 1, finally, the screw is screwed in the screw hole 10 to screw and fix the cover plate 2 and the tank body 1; the clamping mode between the cover plate 2 and the tank body 1 and the screwing of the cover plate 2 and the tank body 1 are combined to effectively improve the sealing efficiency.

[0072] In some embodiments, the lifting mechanism comprises:

[0073] The support 4;

[0074] The first hanging member 41 is arranged on the cover plate 2;

[0075] The second hanging member 42 is arranged on the support 4;

[0076] The cable 43 is connected with the first hanging member 41 at one end and passes through the second hanging member 42 and is connected with the driving member 44 at the other end;

[0077] The driving member 44 is used to drive the cover plate 2 to move up and down in the vertical direction.

[0078] In the above embodiment, the lifting mechanism comprises: a bracket 4, a first lifting piece 41, a second lifting piece 42, a cable 43, and a driving piece 44; the first lifting piece 41 is arranged on the cover plate 2, the second lifting piece 42 is arranged on the bracket 4, the cable 43 is fixed at one end to the first lifting piece 41 and connected at the other end to the driving piece 44 after passing through the second lifting piece 42; in practice, a pulley can also be arranged on the bracket 4, the cable 43 passes through the second lifting piece 42, passes around the pulley, and is connected to the driving piece 44; the driving piece drives the cover plate 2 to move up and down in the vertical direction, so that the cover plate 2 is lifted to cover the tank body 1 or is taken off the tank body 1; the driving piece 44 is an existing driving piece fixed on the base, such as a telescopic cylinder, a telescopic rod, etc., which drives the cover plate 2 to move up and down in the vertical direction through the up-and-down movement of the driving piece 44; the driving piece 44 can also adopt a motor, which drives the cover plate to move through the rotation of the motor; and a controller 45 is further included, which is used to control the up-and-down telescopic movement of the existing driving piece such as the telescopic cylinder or the telescopic rod.

[0079] In some embodiments, the stirring mechanism comprises:

[0080] a stirring motor 5 arranged on the cover plate 2;

[0081] a stirring shaft 51 arranged in the tank body 1, the upper end of which is connected to the rotating shaft of the stirring motor 5 after passing through the cover plate 2;

[0082] a stirring paddle 52 arranged in the tank body 1, the stirring paddle 52 being connected to the stirring shaft 51.

[0083] In some embodiments, further comprising:

[0084] a speed reducer 53 arranged on the cover plate 2, the rotating shaft of the stirring motor 5 being connected to the speed reducer 53;

[0085] a mechanical seal rotating shaft 54, the upper end of which is connected to the rotating shaft of the speed reducer 53 and the lower end of which is connected to the stirring shaft 51 after passing through the cover plate 2;

[0086] the stirring motor 5 drives the speed reducer 53 to rotate the stirring shaft 51;

[0087] the stirring paddle 52 is clamped between the stirring shaft 51.

[0088] In the above embodiment, the stirring paddle 52 is clamped between the stirring shaft 51, for example, in a buckle type connection, which is convenient for the replacement and disassembly of different types of stirring paddles through the buckle type quick connection; further, as Figure 4As shown, the upper end of the stirring paddle 52 is clamped between the stirring shaft 51; the stirring paddle 52 has different forms, such as anchor type, frame type, etc.; the combination of the speed reducer and the stirring motor realizes the efficiency of the torsional power transmission and the fine control of the rotating speed; the upper end of the stirring shaft 51 passes through the cover plate 2 through the mechanical seal rotating shaft 54 and is connected with the rotating shaft of the speed reducer 53, which can realize the stirring under vacuum or different CO2 gas pressure during the stirring process; the mechanical seal rotating shaft 54 is sealed between the cover plate 2.

[0089] In some embodiments, a pressure gauge 26 is arranged on the cover plate 2 for monitoring the gas pressure in the tank body 1.

[0090] A safety pressure relief pipe 24 is arranged on the cover plate 2, and a pressure relief valve is arranged on the safety pressure relief pipe 24 to avoid the tank body pressure exceeding the maximum allowable pressure; when the tank body 1 pressure reaches or exceeds the set pressure, the pressure relief valve will automatically open to release the excess pressure, thereby protecting the tank body 1.

[0091] In some embodiments, a base 6 is further included;

[0092] The support 4 is located on the base 6;

[0093] Two positioning blocks 61 are arranged on the base 6, and a positioning groove 62 is formed between the two positioning blocks 61; a positioning protrusion 14 is arranged on the lower end of the tank body 1 corresponding to the positioning groove, and the positioning protrusion 14 is located in the positioning groove 62.

[0094] In some embodiments, tank body support plates 63 are further arranged on both sides of the tank body 1 on the base 6;

[0095] A rotating rod 64 is rotatably arranged on the tank body support plate 63, and one end of the rotating rod 64 away from the tank body support plate 63 is connected with the tank body, and the rotating rod 64 rotates to drive the tank body 1 to rotate;

[0096] A bolt 65 passes through the positioning block 61 and the positioning protrusion 14 in sequence to fix the tank body 1.

[0097] In the above embodiments, the tank body support plates 63 are vertically arranged on both sides of the tank body 1 on the base 6, the rotating rod 64 is horizontally arranged, one end of the rotating rod 64 is connected with the tank body 1, and the other end is rotatable relative to the tank body support plate 63; during the carbonization process, the positioning protrusion 14 is located in the positioning groove 62, and the bolt 65 passes through the positioning block 61 and the positioning protrusion 14 in sequence to fix the tank body 1, so that the tank body 1 does not shake during stirring; after the carbonization is completed, the screw member is unscrewed from the screw hole 10, then the cover plate 2 is lifted by the lifting mechanism to separate the cover plate 2 from the tank body 1, then the bolt 65 is removed, and the tank body 1 is rotated to pour out the carbonized product.

[0098] In some embodiments, a transparent observation window 25 is further arranged on the cover plate 2, and the transparent observation window 25 is used for observing the reaction in the tank body 1.

[0099] The CO2 inlet pipe 21 is provided with an inlet valve, and by opening the inlet valve, CO2 can be introduced into the tank 1.

[0100] The vacuum pipe 22 is provided with an exhaust valve, and by opening the exhaust valve, the tank 1 can be vacuumized or the gas in the tank 1 can be discharged.

[0101] Specifically, the working process of the pre-carbonized concrete mixing device is as follows: first, the cover plate 2 is lifted by the lifting mechanism, the concrete carbonization raw materials are added into the tank 1, and then the cover plate 2 is lowered and covered on the tank 1 by the lifting mechanism, at this time, the screw holes 10 on the cover plate 2 and the annular plate 11 are aligned; then the inclined surface 13 of the rotating part 12 is clamped in the gap 27 between the fastener 23 and the surface of the cover plate 2 by rotating the rotating part 12; then the screwing part is screwed in the screw hole 10, so that the cover plate 2 and the tank 1 are sealed; then the vacuum pipe 22 is connected with the vacuum pump, the air in the tank 1 is evacuated by the vacuum pump to form a vacuum environment; then the CO2 gas bottle introduces CO2 gas into the tank 1 through the CO2 inlet pipe 21; the stirring motor 5 is started, the stirring motor 5 rotates to drive the speed reducer 53 to rotate the stirring paddle 52 to stir the raw materials, and during the stirring process, the internal stirring condition can be observed through the transparent observation window 25; after the stirring is completed, the gas in the tank 1 is discharged through the vacuum pipe 22, the rotating part 12 is then removed from the gap 27, and then the screwing part is rotated and taken out, then the cover plate 2 is lifted by the lifting mechanism, the tank 1 is rotated, and the stirring finished product is taken out; after the stirring process is completed, the cover plate 2, the tank 1, the stirring paddle 52 and the like should be cleaned immediately to avoid contaminating the next batch of stirring materials.

[0102] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pre-carbonized concrete mixing apparatus, characterized by, The application relates to a CO2 tank, which comprises the following parts: a tank body, in which a stirring mechanism is arranged; a cover plate, which is provided with a CO2 inlet pipe and a vacuum pipe; the CO2 inlet pipe is communicated with a CO2 cylinder and is used for feeding CO2 into the tank body; the cover plate is screwed on the tank body, and a sealing ring is arranged at the joint of the cover plate and the tank body; a lifting mechanism, which is used for lifting the cover plate to cover the tank body or remove the cover plate from the tank body.

2. The pre-carbonized concrete mixing apparatus of claim 1, wherein, An annular plate is arranged on the outer periphery of the tank body port; screw holes are arranged at corresponding positions on the cover plate and the annular plate, and a screwing piece is screwed into the screw holes to cover the cover plate on the tank body port; a sealing ring is arranged at the joint of the cover plate and the tank body port.

3. A pre-carbonized concrete mixing apparatus as claimed in claim 2, wherein, a rotatable piece is arranged on the annular plate, and the upper end surface of the rotatable piece is an inclined surface which inclines downward; a fastener is arranged on the cover plate, and a gap is formed between the fastener and the surface of the cover plate; when the cover plate is covered on the tank body, the rotatable piece is rotated, and the inclined surface of the rotatable piece is clamped in the gap.

4. The pre-carbonized concrete mixing apparatus of claim 1, wherein, The lifting mechanism comprises: a support; a first hanging piece arranged on the cover plate; a second hanging piece arranged on the support; a cable, one end of which is connected with the first hanging piece, and the other end of which is connected with a driving piece after passing through the second hanging piece; the driving piece is used for driving the cover plate to move up and down in the vertical direction.

5. The pre-carbonized concrete mixing apparatus of claim 1, wherein The stirring mechanism comprises: a stirring motor arranged on the cover plate; a stirring shaft arranged in the tank body, the upper end of the stirring shaft passes through the cover plate and is connected with the rotating shaft of the stirring motor; a stirring paddle arranged in the tank body, the stirring paddle is connected with the stirring shaft.

6. A pre-carbonized concrete mixing apparatus as claimed in claim 5, wherein, Further comprising: a speed reducer arranged on the cover plate, the rotating shaft of the stirring motor is connected with the speed reducer; a mechanical seal rotating shaft, the upper end of the mechanical seal rotating shaft is connected with the rotating shaft of the speed reducer, and the lower end of the mechanical seal rotating shaft passes through the cover plate and is connected with the stirring shaft; the stirring motor drives the speed reducer to rotate the stirring shaft; the stirring paddle is clamped with the stirring shaft.

7. The pre-carbonized concrete mixing apparatus of claim 1, wherein a pressure gauge is arranged on the cover plate; a safety pressure relief pipe is arranged on the cover plate, and a pressure relief valve is arranged on the safety pressure relief pipe.

8. The pre-carbonized concrete mixing apparatus of claim 4, wherein, further comprising a base; the support is arranged on the base; two positioning blocks are arranged on the base, and a positioning groove is formed between the two positioning blocks; a positioning protrusion is arranged at the lower end of the tank body corresponding to the positioning groove, and the positioning protrusion is arranged in the positioning groove.

9. A pre-carbonized concrete mixing apparatus as claimed in claim 8, wherein, tank body support plates are arranged on both sides of the base; a rotating rod is rotatably arranged on the tank body support plate, one end of the rotating rod away from the tank body support plate is connected with the tank body, and the rotating rod drives the tank body to rotate; a bolt passes through the positioning block and the positioning protrusion in sequence to fix the tank body.

10. The pre-carbonized concrete mixing apparatus of claim 1, wherein, a transparent observation window is further arranged on the cover plate; an inlet valve is arranged on the CO2 inlet pipe; an exhaust valve is arranged on the vacuum pipe.

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