Concrete mixing equipment

Abstract

The invention relates to the technical field of constructional engineering machinery, in particular to concrete mixing equipment which comprises a mixing drum, a mixing mechanism, a feeding mechanism and a discharging mechanism. The mixing drum comprises a drum body, and a top cover and a bottom cover which are respectively arranged at the top and the bottom of the drum body; the stirring mechanism comprises a speed reducer embedded in the upper surface of the top cover; by arranging the stirring mechanism, when the equipment stirs concrete, materials are put into the barrel through a feeding hopper, then a driving motor is started, rotation of the driving motor drives a connecting shaft to rotate after being decelerated through a speed reducer, rotation of the connecting shaft drives a stirring shaft to rotate, rotation of the stirring shaft drives stirring spiral blades to rotate, and the stirring spiral blades rotate; according to the technical scheme, materials in the barrel are rapidly stirred, axial and radial mixing of the materials is achieved through forward and reverse movement of the stirring spiral blades, and therefore compared with the prior art, the stirring uniformity can be improved, and the stirring efficiency is effectively improved.

Description

Technical Field

[0001] This application relates to the field of construction machinery technology, and in particular to a concrete mixing device. Background Technology

[0002] Concrete mixing equipment is one of the core pieces of equipment in construction engineering, and its performance directly affects the quality of concrete and construction efficiency. In recent years, with the increasing demands from the construction industry for concrete strength, durability, and environmental protection, traditional mixing equipment has become increasingly inadequate in terms of energy consumption, mixing uniformity, and automation.

[0003] Currently, the mainstream equipment includes forced mixers, gravity mixers, and continuous mixers, but all of them have limitations to varying degrees, including:

[0004] Forced mixers use blades to forcibly mix materials, resulting in high mixing efficiency but also high energy consumption and severe blade wear.

[0005] Gravity-fed mixers rely on gravity to mix materials. They have a simple structure but a long mixing cycle and poor uniformity.

[0006] Although continuous mixers can achieve uninterrupted production, they are large in size and have high maintenance costs.

[0007] In summary, existing equipment generally suffers from high energy consumption and short lifespan of vulnerable parts.

[0008] Therefore, this application provides a concrete mixing device. Summary of the Invention

[0009] The purpose of this application is to solve at least one technical problem raised in the background art.

[0010] This application provides a concrete mixing device, including a mixing drum, a mixing mechanism, a feeding mechanism, and a discharging mechanism;

[0011] The stirring cylinder includes a cylinder body and a top cover and a bottom cover respectively disposed at the top and bottom of the cylinder body. The bottom end of the bottom cover is provided with three supporting legs arranged in a circumferential array.

[0012] The stirring mechanism includes a reducer embedded in the upper surface of the top cover and a drive motor fixed in the upper surface of the top cover for driving the input shaft of the reducer to rotate. The output shaft of the reducer extends to the inner top of the top cover and is fixed with a connecting shaft. The bottom end of the connecting shaft is provided with a stirring shaft, and the outer surface of the stirring shaft is fixed with stirring spiral blades.

[0013] The feeding mechanism includes a feeding funnel disposed on the upper surface of the top cover, and the bottom end of the feeding funnel extends into the interior of the cylinder.

[0014] By adopting the above technical solution, the uniformity of mixing can be improved, the mixing efficiency can be effectively increased, and the overall size of the equipment is small, making it easy to carry out maintenance.

[0015] Preferably, the cylinder includes an outer layer disposed between a top cover and a bottom cover, and an inner layer disposed inside the outer layer. The outer layer is made of carbon steel, and the inner layer is made of wear-resistant alloy steel. The inner layer is also provided with an inner liner plate. The stirring spiral blade is made of high-chromium cast iron, and the inner liner plate is made of NM400 wear-resistant steel plate.

[0016] By adopting the above technical solution, the cylinder adopts a double-layer structure, which can reduce noise and heat loss. Moreover, the inner lining plate can prevent wear on the inner wall of the cylinder, thereby effectively improving the service life of the equipment.

[0017] Preferably, a first connecting ring is fixedly provided on the outer surface of both the top cover and the bottom cover, and a second connecting ring is fixedly provided on both the top and bottom ends of the cylinder. The first connecting ring and the second connecting ring are locked together by a plurality of mounting bolts.

[0018] By adopting the above technical solution, it is possible to quickly assemble and disassemble the cylinder.

[0019] Preferably, the bottom end of the connecting shaft and the top end of the stirring shaft are both provided with matching flange connecting plates, and the two flange connecting plates are connected and fixed by a number of connecting bolts.

[0020] By adopting the above technical solution, it is possible to quickly install and disassemble the stirring shaft.

[0021] Preferably, the unloading mechanism includes an unloading pipe disposed at the bottom end of the bottom cover, and an unloading valve is disposed on the surface of the unloading pipe. The unloading mechanism also includes an unloading slide fixed to the lower surface of the bottom cover by a support rod, and the unloading slide is inclinedly disposed at the bottom of the unloading pipe and corresponds to the unloading pipe.

[0022] By adopting the above technical solution, after mixing is completed, the discharge valve can be opened, allowing the material inside the cylinder to fall into the discharge chute through the discharge pipe and be guided for discharge through the discharge chute.

[0023] Preferably, the cylinder is provided with a water spraying mechanism, which includes a water storage cylinder fixed on the upper surface of the top cover and a rectangular box fixed on the inner top wall of the top cover. The inner wall of the rectangular box is rotatably provided with a reciprocating screw extending to the outer surface of the rectangular box. One end of the reciprocating screw and the surface of the connecting shaft are both fixed with meshing bevel gears.

[0024] By adopting the above technical solution, an appropriate amount of water can be accurately added through the water storage cylinder, and the reciprocating screw can be automatically rotated under the action of two bevel gears during the rotation of the connecting shaft.

[0025] Preferably, a rectangular plate and a sealing plate are slidably disposed on the inner wall of the rectangular box, a connecting rod is fixedly disposed between the sealing plate and the rectangular plate, and a threaded hole is provided on the side of the rectangular plate for threaded connection with the outer surface of the reciprocating lead screw.

[0026] By adopting the above technical solution, the rectangular plate can be automatically moved laterally during the rotation of the reciprocating screw.

[0027] Preferably, the water spraying mechanism further includes a water spraying pipe fixed to the lower surface of the rectangular box via a connecting column. The surface of the water spraying pipe is provided with a plurality of atomizing nozzles at equal intervals. The outer surface of the rectangular box is provided with a water suction pipe and a water outlet pipe. One end of the water suction pipe extends into the interior of the rectangular box, and the other end of the water suction pipe extends into the bottom of the water storage cylinder. One end of the water outlet pipe extends into the interior of the rectangular box, and the other end of the water outlet pipe extends into the interior of the water spraying pipe. The surfaces of the water suction pipe and the water outlet pipe are respectively provided with a water suction check valve and a water outlet check valve. The top of the water storage cylinder is provided with a water injection pipe, and the top of the water injection pipe is provided with a mesh vent cap.

[0028] By adopting the above technical solution, when the sealing plate moves to the right, water in the water storage cylinder can be sucked into the rectangular box through the water suction pipe, and when the sealing plate moves to the left, water in the rectangular box can be transported to the spray pipe through the water outlet pipe.

[0029] Preferably, the interior of the cylinder is further provided with a mixing mechanism, which includes a connecting plate fixed to the surface of the stirring shaft, a vertical shaft rotatably disposed on the lower surface of the connecting plate, and a mixing spiral blade fixed to the surface of the vertical shaft.

[0030] By adopting the above technical solution, the connecting plate and the vertical shaft can be driven to perform circular motion during the rotation of the stirring shaft.

[0031] Preferably, the mixing mechanism further includes an internal toothed ring fixed to the inner annular surface of the cylinder, and a toothed disc that meshes with the internal toothed ring is fixed to the top of the vertical shaft.

[0032] By adopting the above technical solution, the vertical shaft can be driven to rotate under the action of the gear plate and the internal gear ring during the circular motion of the vertical shaft.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. The concrete mixing equipment described in this application, by setting up a mixing mechanism, allows the equipment to first feed materials into the drum through a feeding funnel when mixing concrete. Then, the drive motor is started, and the rotation of the drive motor is reduced by a reducer to drive the connecting shaft to rotate. The rotation of the connecting shaft drives the mixing shaft to rotate, and the rotation of the mixing shaft drives the mixing spiral blades to rotate, thereby rapidly mixing the materials in the drum. The forward and reverse motion of the mixing spiral blades achieves axial and radial mixing of the materials. Therefore, compared with the prior art, this technical solution can improve the uniformity of mixing and effectively improve the mixing efficiency.

[0035] 2. The concrete mixing equipment described in this application, by setting a water spraying mechanism, after the material is added into the cylinder, the drive motor is started to drive the connecting shaft to rotate. The rotation of the connecting shaft can drive the reciprocating screw to rotate under the action of two bevel gears. The rotation of the reciprocating screw drives the rectangular plate to move back and forth laterally, and drives the sealing plate to move back and forth laterally through the connecting rod. When the sealing plate moves to the right, it can suck water from the water storage cylinder into the rectangular box through the water suction pipe. When the sealing plate moves to the left, it can transport the water in the rectangular box to the water spraying pipe through the water outlet pipe, and spray it into the cylinder through the atomizing nozzle, so that the water can be evenly mixed with the material in the cylinder and avoid clumping.

[0036] 3. The concrete mixing equipment described in this application, by setting a mixing mechanism, can drive the connecting plate to perform circumferential motion during the rotation of the mixing shaft. The circumferential motion of the connecting plate drives the vertical shaft to perform circumferential motion. When the vertical shaft performs circumferential motion, the toothed disc can move on the inner ring surface of the inner toothed ring and drive the toothed disc to rotate under the action of the inner toothed ring. The rotation of the toothed disc drives the vertical shaft to rotate, thereby driving the mixing spiral blade to achieve the purpose of self-rotation during the circumferential motion around the mixing shaft. This can fully mix the material at the edge of the cylinder and effectively improve the mixing efficiency. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0038] Figure 2 This is a schematic diagram of the internal structure of the cylinder in Embodiment 1 of this application;

[0039] Figure 3 This application Figure 2 A schematic diagram of the second-view structure;

[0040] Figure 4 This application Figure 3 Enlarged structural diagram at point A in the middle;

[0041] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this application;

[0042] Figure 6 This is a rear view structural diagram of Embodiment 2 of this application;

[0043] Figure 7 This is a cross-sectional structural diagram of Embodiment 2 of this application;

[0044] Figure 8 This application Figure 7 Enlarged structural diagram at point B.

[0045] Explanation of reference numerals in the attached figures:

[0046] 100. Mixing drum; 101. Drum body; 1011. Outer layer; 1012. Inner layer; 1013. Liner plate; 102. Top cover; 103. Bottom cover; 104. Support legs;

[0047] 200. Stirring mechanism; 201. Reducer; 202. Drive motor; 203. Connecting shaft; 204. Stirring shaft; 205. Stirring auger blade; 206. Flange connecting plate;

[0048] 300. Feeding mechanism; 301. Feeding funnel;

[0049] 400. Unloading mechanism; 401. Unloading pipe; 402. Unloading valve; 403. Unloading chute;

[0050] 500. Water spraying mechanism; 501. Water storage cylinder; 502. Rectangular box; 503. Reciprocating screw; 504. Bevel gear; 505. Rectangular plate; 506. Sealing plate; 507. Connecting rod; 508. Water spray pipe; 509. Atomizing nozzle; 5010. Water suction pipe; 5011. Water outlet pipe;

[0051] 600. Mixing mechanism; 601. Connecting plate; 602. Vertical shaft; 603. Mixing spiral blade; 604. Internal gear ring; 605. Gear disc. Detailed Implementation

[0052] The following combination Figures 1 to 8 This application will be described in further detail below.

[0053] Example 1

[0054] Please refer to the following carefully. Figures 1 to 4A concrete mixing device includes a mixing drum 100, a mixing mechanism 200, a feeding mechanism 300, and a discharging mechanism 400. The mixing drum 100 includes a drum body 101 and a top cover 102 and a bottom cover 103 respectively disposed at the top and bottom of the drum body 101. The bottom end of the bottom cover 103 is provided with three supporting legs 104 arranged in a circumferential array. The mixing mechanism 200 includes a reducer 201 embedded in the upper surface of the top cover 102 and a drive motor 202 fixed in the upper surface of the top cover 102 for driving the input shaft of the reducer 201 to rotate. The output shaft of the reducer 201 extends to the inner top of the top cover 102 and is fixedly provided with a connecting shaft 203. The bottom end of the connecting shaft 203 is provided with a mixing shaft 204, and the outer surface of the mixing shaft 204 is fixedly provided with a mixing spiral blade 205. The feeding mechanism 300 includes a feeding funnel 301 disposed in the upper surface of the top cover 102, and the bottom end of the feeding funnel 301 extends into the interior of the drum body 101.

[0055] Specifically, compared with the existing technology, the above technical solution can improve the uniformity of mixing, effectively improve the mixing efficiency, and the overall size of the equipment is small, making it easy to maintain.

[0056] Please refer to this carefully. Figure 3 , Figure 4 The cylinder 101 includes an outer layer 1011 disposed between the top cover 102 and the bottom cover 103, and an inner layer 1012 disposed inside the outer layer 1011. The outer layer 1011 is made of carbon steel, and the inner layer 1012 is made of wear-resistant alloy steel. The inner layer 1012 is also provided with an inner liner plate 1013. The stirring spiral blade 205 is made of high-chromium cast iron, and the inner liner plate 1013 is made of NM400 wear-resistant steel plate.

[0057] Specifically, the double-layer structure of the cylinder 101 reduces noise and heat loss, and the inner lining plate 1013 prevents wear on the inner wall of the cylinder 101, thereby effectively improving the service life of the equipment.

[0058] Please refer to this carefully. Figure 2 , Figure 3 The top cover 102 and the bottom cover 103 are both fixed with a first connecting ring on their outer surfaces, and the top and bottom ends of the cylinder 101 are both fixed with a second connecting ring. The first connecting ring and the second connecting ring are locked together by a number of mounting bolts.

[0059] Specifically, it facilitates the quick assembly and disassembly of the cylinder 101.

[0060] Please refer to this carefully. Figure 3 , Figure 4 Both the bottom end of the connecting shaft 203 and the top end of the stirring shaft 204 are provided with matching flange connecting plates 206, and the two flange connecting plates 206 are connected and fixed by several connecting bolts.

[0061] Specifically, it facilitates the quick installation and removal of the stirring shaft 204, thereby facilitating the installation and removal of the stirring spiral blade 205.

[0062] Please refer to this carefully. Figure 2 , Figure 3 The unloading mechanism 400 includes an unloading pipe 401 disposed at the bottom end of the bottom cover 103, and an unloading valve 402 disposed on the surface of the unloading pipe 401. The unloading mechanism 400 also includes an unloading slide 403 fixed to the lower surface of the bottom cover 103 by a support rod, and the unloading slide 403 is inclinedly disposed at the bottom of the unloading pipe 401 and corresponds to the unloading pipe 401.

[0063] Specifically, after mixing is complete, the discharge valve 402 can be opened, allowing the material inside the cylinder 101 to fall through the discharge pipe 401 into the discharge slide 403, and then be guided for discharge through the discharge slide 403.

[0064] In this embodiment, by setting up a mixing mechanism 200, when the equipment is mixing concrete, the material is first fed into the cylinder 101 through the feeding funnel 301. Then, the drive motor 202 is started. The rotation of the drive motor 202 is reduced by the reducer 201 and drives the connecting shaft 203 to rotate. The rotation of the connecting shaft 203 drives the mixing shaft 204 to rotate. The rotation of the mixing shaft 204 drives the mixing spiral blade 205 to rotate, which quickly mixes the material in the cylinder 101. The forward and reverse movement of the mixing spiral blade 205 realizes the axial and radial mixing of the material. Therefore, compared with the prior art, this technical solution can improve the uniformity of mixing and effectively improve the mixing efficiency.

[0065] Example 2

[0066] Based on Example 1, referring to Figures 5 to 8 And unlike Example 1, the following is true:

[0067] Please refer to this carefully. Figure 7 , Figure 8 The cylinder 101 is equipped with a water spraying mechanism 500. The water spraying mechanism 500 includes a water storage cylinder 501 fixed on the upper surface of the top cover 102 and a rectangular box 502 fixed on the inner top wall of the top cover 102. The inner wall of the rectangular box 502 is rotatably provided with a reciprocating screw 503 extending to the outer surface of the rectangular box 502. One end of the reciprocating screw 503 and the surface of the connecting shaft 203 are both fixed with meshing bevel gears 504.

[0068] Specifically, it can accurately add an appropriate amount of water through the water storage cylinder 501, and can drive the reciprocating screw 503 to rotate automatically under the action of the two bevel gears 504 during the rotation of the connecting shaft 203.

[0069] Please refer to this carefully. Figure 7 , Figure 8 A rectangular plate 505 and a sealing plate 506 are slidably arranged on the inner wall of the rectangular box 502. A connecting rod 507 is fixed between the sealing plate 506 and the rectangular plate 505. A threaded hole is opened on the side of the rectangular plate 505 to be threaded to the outer surface of the reciprocating screw 503.

[0070] Specifically, during the rotation of the reciprocating screw 503, the rectangular plate 505 can be automatically moved laterally and reciprocally under the action of the threaded hole.

[0071] Please refer to this carefully. Figure 7 , Figure 8 The water spraying mechanism 500 also includes a water spraying pipe 508 fixed to the lower surface of the rectangular box 502 by a connecting column. Several atomizing nozzles 509 are equidistantly arranged on the surface of the water spraying pipe 508. A water suction pipe 5010 and a water outlet pipe 5011 are respectively arranged on the outer surface of the rectangular box 502. One end of the water suction pipe 5010 extends into the interior of the rectangular box 502, and the other end of the water suction pipe 5010 extends into the bottom of the water storage cylinder 501. One end of the water outlet pipe 5011 extends into the interior of the rectangular box 502, and the other end of the water outlet pipe 5011 extends into the interior of the water spraying pipe 508. A water suction check valve and a water outlet check valve are respectively arranged on the surface of the water suction pipe 5010 and the water outlet pipe 5011. A water injection pipe is arranged on the top of the water storage cylinder 501, and a mesh vent cap is arranged on the top of the water injection pipe.

[0072] Specifically, when the sealing plate 506 moves to the right, water in the water storage cylinder 501 can be drawn into the rectangular box 502 through the water suction pipe 5010. When the sealing plate 506 moves to the left, water in the rectangular box 502 can be transported to the spray pipe 508 through the water outlet pipe 5011.

[0073] In this invention, by setting up a water spraying mechanism 500, after the material is added into the cylinder 101, the drive motor 202 is started to drive the connecting shaft 203 to rotate. The rotation of the connecting shaft 203 can drive the reciprocating screw 503 to rotate under the action of two bevel gears 504. The rotation of the reciprocating screw 503 drives the rectangular plate 505 to move back and forth laterally, and drives the sealing plate 506 to move back and forth laterally through the connecting rod 507. When the sealing plate 506 moves to the right, it can suck water from the water storage cylinder 501 into the rectangular box 502 through the water suction pipe 5010. When the sealing plate 506 moves to the left, it can transport the water in the rectangular box 502 to the water spraying pipe 508 through the water outlet pipe 5011, and spray it into the cylinder 101 through the atomizing nozzle 509, so that the water can be evenly mixed with the material in the cylinder 101 and avoid clumping.

[0074] Please refer to this carefully. Figure 7 , Figure 8 The cylinder 101 is also equipped with a mixing mechanism 600. The mixing mechanism 600 includes a connecting plate 601 fixed on the surface of the stirring shaft 204. A vertical shaft 602 is rotatably provided on the lower surface of the connecting plate 601, and a mixing spiral blade 603 is fixed on the surface of the vertical shaft 602.

[0075] Specifically, it can drive the connecting plate 601 and the vertical shaft 602 to perform circular motion during the rotation of the stirring shaft 204.

[0076] Please refer to this carefully. Figure 7 , Figure 8 The mixing mechanism 600 also includes an internal toothed ring 604 fixed on the inner annular surface of the cylinder 101, and a toothed disc 605 that meshes with the internal toothed ring 604 is fixed at the top end of the vertical shaft 602.

[0077] Specifically, during the circular motion of the vertical shaft 602, it can be driven to rotate by the gear disk 605 and the internal gear ring 604.

[0078] In this invention, by setting up a mixing mechanism 600, during the rotation of the stirring shaft 204, the connecting plate 601 can be driven to perform circumferential motion. The circumferential motion of the connecting plate 601 drives the vertical shaft 602 to perform circumferential motion. When the vertical shaft 602 performs circumferential motion, the toothed disc 605 can move on the inner ring surface of the inner toothed ring 604, and under the action of the inner toothed ring 604, the toothed disc 605 is driven to rotate. The rotation of the toothed disc 605 drives the vertical shaft 602 to rotate, thereby driving the mixing spiral blade 603 to achieve the purpose of self-rotation during the circumferential motion around the stirring shaft 204. This allows the material at the edge of the cylinder 101 to be fully stirred and mixed, effectively improving the mixing efficiency.

[0079] Working principle:

[0080] When mixing concrete, the material is first fed into the cylinder 101 through the feed funnel 301. Then, the drive motor 202 is started. The rotation of the drive motor 202 is reduced in speed by the reducer 201, which drives the connecting shaft 203 to rotate. The rotation of the connecting shaft 203 drives the mixing shaft 204 to rotate, which in turn drives the mixing spiral blades 205 to rotate, thus rapidly mixing the material in the cylinder 101. The forward and reverse motion of the mixing spiral blades 205 achieves axial and radial mixing of the material. After mixing is completed, the unloading is started. The material valve 402 enables automatic unloading, thus improving the uniformity of mixing and effectively increasing the mixing efficiency compared to existing technologies. Simultaneously, after the material is added into the cylinder 101, the drive motor 202 is started to rotate the connecting shaft 203. The rotation of the connecting shaft 203, under the action of two bevel gears 504, drives the reciprocating screw 503 to rotate. The rotation of the reciprocating screw 503 causes the rectangular plate 505 to move laterally back and forth, and through the connecting rod 507, it drives the sealing plate 506 to move laterally back and forth. When the sealing plate 506 moves to the right, it can draw water from the water storage cylinder 501 into the rectangular box 502 through the water suction pipe 5010. When the sealing plate 506 moves to the left, it can transport the water from the rectangular box 502 to the spray pipe 508 through the water outlet pipe 5011, and spray it into the cylinder 101 through the atomizing nozzle 509. This allows the water to mix evenly with the materials in the cylinder 101, preventing clumping. Furthermore, during the rotation of the stirring shaft 204, it can drive the connecting plate 601 to perform circular motion. The circular motion of the connecting plate 601 drives the vertical shaft 602 to perform circular motion. When the vertical shaft 602 performs circular motion, the toothed disc 605 can move on the inner ring surface of the inner toothed ring 604, and under the action of the inner toothed ring 604, it drives the toothed disc 605 to rotate. The rotation of the toothed disc 605 drives the vertical shaft 602 to rotate, thereby driving the mixing spiral blade 603 to achieve the purpose of self-rotation during the circular motion around the stirring shaft 204. This allows the material at the edge of the cylinder 101 to be fully stirred and mixed, effectively improving the mixing efficiency.

Claims

1. A concrete mixing device, characterized in that, It includes a mixing drum (100), a mixing mechanism (200), a feeding mechanism (300), and a discharging mechanism (400); The stirring drum (100) includes a drum body (101) and a top cover (102) and a bottom cover (103) respectively disposed at the top and bottom of the drum body (101). The bottom end of the bottom cover (103) is provided with three support legs (104) arranged in a circumferential array. The stirring mechanism (200) includes a reducer (201) embedded in the upper surface of the top cover (102) and a drive motor (202) fixed on the upper surface of the top cover (102) for driving the input shaft of the reducer (201) to rotate. The output shaft of the reducer (201) extends to the inner top of the top cover (102) and is fixedly provided with a connecting shaft (203). The bottom end of the connecting shaft (203) is provided with a stirring shaft (204), and the outer surface of the stirring shaft (204) is fixedly provided with stirring spiral blades (205). The feeding mechanism (300) includes a feeding funnel (301) disposed on the upper surface of the top cover (102), and the bottom end of the feeding funnel (301) extends into the interior of the cylinder (101).

2. The concrete mixing equipment according to claim 1, characterized in that, The cylinder (101) includes an outer layer (1011) disposed between the top cover (102) and the bottom cover (103), and an inner layer (1012) disposed inside the outer layer (1011). The outer layer (1011) is made of carbon steel, and the inner layer (1012) is made of wear-resistant alloy steel. The inner layer (1012) is also provided with an inner liner plate (1013). The stirring spiral blade (205) is made of high-chromium cast iron, and the inner liner plate (1013) is made of NM400 wear-resistant steel plate.

3. The concrete mixing equipment according to claim 1, characterized in that, The top cover (102) and bottom cover (103) are both fixed with a first connecting ring on their outer surfaces, and the top and bottom ends of the cylinder (101) are both fixed with a second connecting ring. The first connecting ring and the second connecting ring are locked together by a number of mounting bolts.

4. A concrete mixing device according to claim 1, characterized in that, The bottom end of the connecting shaft (203) and the top end of the stirring shaft (204) are both provided with matching flange connecting plates (206), and the two flange connecting plates (206) are connected and fixed by a number of connecting bolts.

5. A concrete mixing device according to claim 4, characterized in that, The unloading mechanism (400) includes an unloading pipe (401) disposed at the bottom end of the bottom cover (103), and an unloading valve (402) is provided on the surface of the unloading pipe (401). The unloading mechanism (400) also includes an unloading slide (403) fixed to the lower surface of the bottom cover (103) by a support rod, and the unloading slide (403) is inclinedly disposed at the bottom of the unloading pipe (401) and corresponds to the unloading pipe (401).

6. A concrete mixing device according to claim 1, characterized in that, The cylinder (101) is equipped with a water spraying mechanism (500). The water spraying mechanism (500) includes a water storage cylinder (501) fixed on the upper surface of the top cover (102) and a rectangular box (502) fixed on the inner top wall of the top cover (102). The inner wall of the rectangular box (502) is rotatably provided with a reciprocating screw (503) extending to the outer surface of the rectangular box (502). One end of the reciprocating screw (503) and the surface of the connecting shaft (203) are both fixed with meshing bevel gears (504).

7. A concrete mixing device according to claim 6, characterized in that, The inner wall of the rectangular box (502) is slidably provided with a rectangular plate (505) and a sealing plate (506). A connecting rod (507) is fixed in the middle between the sealing plate (506) and the rectangular plate (505). The side of the rectangular plate (505) is provided with a threaded hole that is threaded to the outer surface of the reciprocating screw (503).

8. A concrete mixing device according to claim 7, characterized in that, The water spraying mechanism (500) also includes a water spraying pipe (508) fixed to the lower surface of the rectangular box (502) by a connecting column. A plurality of atomizing nozzles (509) are equidistantly arranged on the surface of the water spraying pipe (508). A water suction pipe (5010) and a water outlet pipe (5011) are respectively arranged on the outer surface of the rectangular box (502). One end of the water suction pipe (5010) extends into the interior of the rectangular box (502), and the other end of the water suction pipe (5010) Extending to the inner bottom of the water storage cylinder (501), one end of the water outlet pipe (5011) extends into the interior of the rectangular box (502), and the other end of the water outlet pipe (5011) extends into the interior of the spray pipe (508). The surfaces of the water suction pipe (5010) and the water outlet pipe (5011) are respectively provided with a water suction one-way valve and a water outlet one-way valve. The top of the water storage cylinder (501) is provided with a water injection pipe, and the top of the water injection pipe is provided with a mesh vent cover.

9. A concrete mixing device according to claim 1, characterized in that, The cylinder (101) is also provided with a mixing mechanism (600). The mixing mechanism (600) includes a connecting plate (601) fixed on the surface of the stirring shaft (204). A vertical shaft (602) is rotatably provided on the lower surface of the connecting plate (601) and a mixing spiral blade (603) is fixed on the surface of the vertical shaft (602).

10. A concrete mixing device according to claim 9, characterized in that, The mixing mechanism (600) further includes an internal toothed ring (604) fixed on the inner annular surface of the cylinder (101), and a toothed disc (605) that meshes with the internal toothed ring (604) is fixed at the top end of the vertical shaft (602).

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