Cement gravel stirring device

Abstract

The invention discloses a cement macadam stirring device, and relates to the field of cement stirring, the cement macadam stirring device comprises a stirring main body, a stirring cavity is formed in the stirring main body, a plurality of stirring rods are rotatably connected in the stirring cavity, and stirring blades for stirring cement and macadam are arranged at the bottoms of the stirring rods; the stirring blades are obliquely arranged in the tangential direction of forward rotation of the stirring blades in the circumferential outward direction, the bottoms of the stirring blades are attached to the bottom of the stirring cavity, a driving assembly used for driving the multiple stirring rods to rotate is arranged on the stirring body, and a lifting assembly used for controlling the stirring blades to ascend and descend is arranged on the stirring body. The lifting assembly controls the stirring blades to abut against the bottom of the stirring cavity, the driving assembly controls the stirring blades to rotate reversely and clean concrete, a discharging opening is formed in the side wall of the stirring cavity, and an opening and closing door used for closing the discharging opening is arranged on the stirring body. According to the concrete stirring device, residues of concrete in the stirring device are reduced, the waste of the concrete is reduced, and the concrete cleaning convenience is improved.

Description

Technical Field

[0001] The present application relates to the field of cement mixing, and in particular to a cement gravel mixing device. Background Art

[0002] At present, cement-gravel mixing method refers to the method used to mix cement-gravel, which can be static mixing or vibration mixing. Cement-gravel mixing method refers to the mixing method used for cement-stabilized gravel during construction. A good mixing method can make the cement in cement-stabilized gravel less likely to clump and make the cement evenly dispersed in the coarse aggregate.

[0003] In the prior art, a concrete mixing device comprises a concrete mixing body, a mixing chamber for mixing concrete is provided on the concrete body, a plurality of mixing rods are rotatably connected in the mixing chamber, cement and gravel are fully mixed through the mixing rods, a driving device for driving the plurality of mixing rods to rotate is provided at the bottom of the concrete body; a discharge port is provided at the bottom of the concrete body, a rotating sealing plate is rotatably connected to the concrete body, the rotating sealing plate is used to block the discharge port, and sealing the discharge port can make the concrete more fully mixed in the mixing chamber.

[0004] With regard to the above-mentioned prior art, when discharging, the sealing plate is rotated to open the discharge port so that the mixed concrete can be discharged. Since the mixing chamber is usually arranged in a cylindrical shape, the concrete at the bottom is difficult to discharge, so that more concrete remains in the mixing chamber, causing a certain amount of waste. At this time, the staff needs to use tools to push out more concrete to reduce the residual concrete, which will greatly reduce the convenience of using the concrete mixing device and urgently needs to be improved. Summary of the invention

[0005] In order to reduce the concrete residue in the mixing device, reduce the waste of concrete, and improve the convenience of concrete cleaning, the present application provides a cement gravel mixing device.

[0006] The present application provides a cement gravel mixing device adopting the following technical solution: The invention comprises a stirring body, a stirring chamber is provided on the stirring body, a plurality of stirring rods are rotatably connected in the stirring chamber, a stirring blade for stirring cement and gravel is provided at the bottom of the stirring rod, the stirring blade is inclined in the tangential direction of its forward rotation along the circumference outward, the bottom of the stirring blade is fitted with the bottom of the stirring chamber, a driving component for driving the plurality of stirring rods to rotate is provided on the stirring body, a lifting component for controlling the lifting of the stirring blade is provided on the stirring body, the lifting component controls the stirring blade to abut against the bottom of the stirring chamber, the driving component controls the stirring blade to reverse and clean the concrete, a discharge port is provided on the side wall of the stirring chamber, and a switch door for closing the discharge port is provided on the stirring body.

[0007] By adopting the above technical scheme, during operation, cement, gravel and water are put into the mixing chamber in proportion, and then a plurality of stirring blades are used to stir the materials in the mixing chamber. The inclined stirring blades are used to move the concrete at the bottom toward the center. When there is a large amount of concrete at the center, the concrete will flow, so that the concrete in the mixing chamber can be fully mixed. After stirring for a certain period of time, the switch door is opened to discharge the concrete in the mixing chamber, the driving component drives the stirring blade to reverse, and the lifting component is used to make the stirring blade abut against the bottom of the mixing chamber, so that the concrete can be moved toward the side wall of the mixing chamber and discharged from the discharge port. With such a design, on the one hand, the concrete can be mixed more fully and the uniformity of concrete mixing can be improved. On the other hand, under the action of the stirring blades, the concrete in the mixing chamber can be fully discharged, the concrete residue can be reduced, and the convenience of cleaning the mixing device can be improved.

[0008] Preferably, the driving assembly includes a driving member arranged at the bottom of the stirring body, a central axis is rotatably connected in the stirring chamber, the top of the central axis is connected to the tops of multiple stirring rods, the driving member drives the central axis to rotate, the stirring rods are symmetrically arranged in the stirring chamber, and the multiple stirring rods rotate on different rotating planes.

[0009] By adopting the above technical solution, multiple symmetrically designed stirring rods can achieve a balance in the torque generated on the central axis when stirring concrete, so that the central axis can rotate more stably and smoothly, reduce the offset of the central axis, reduce the resistance to the rotation of the central axis, and increase the service life of the stirring device.

[0010] Preferably, the lifting assembly includes a lifting seat rotatably arranged on the stirring body, the driving member is used to drive the lifting seat to rotate, a center hole is provided on the lifting seat to be plugged into the center axis, a limiting wedge is provided on the side wall of the center axis, a limiting inclined groove is provided on the side wall of the center hole to be slidably matched with the limiting wedge, and the limiting inclined groove is inclined downward along the tangent direction of the positive rotation of the center axis.

[0011] By adopting the above technical solution, when the driving member rotates forward, the limiting wedge block rotates to the top of the limiting chute, pushes the center axis to rise, and drives the stirring blade to rise upward, so that the stirring blade can rotate smoothly in the stirring chamber, thereby improving the convenience of concrete mixing; when the driving member rotates reversely, the limiting wedge block rotates to the top of the limiting chute, pulls the center axis to move downward, and drives the stirring blade to move downward, so that the stirring blade abuts against the bottom of the stirring chamber, so that the concrete in the mixing chamber can be discharged more smoothly, thereby improving the convenience of concrete cleaning.

[0012] Preferably, a sliding slope is provided at the bottom of the stirring piece, and the sliding slope is inclined downward along the forward rotation tangent direction of the stirring piece. A sliding piece is slidingly arranged on the sliding slope, and a plurality of pushing sliders are provided on the side of the sliding piece close to the stirring piece. A plurality of pushing grooves that slide with the pushing sliders are provided on the sliding slope, and the pushing grooves are provided along the rotation direction of the stirring piece. A pushing compression spring that abuts against the pushing slider is provided in the pushing groove, and the pushing compression spring is used to push the sliding piece to move along the tangent direction of the stirring piece.

[0013] By adopting the above technical solution, when in use, the stirring blade moves toward the bottom of the stirring chamber. When the stirring blade reverses, the concrete in the stirring chamber pushes the sliding blade to move closer to the bottom of the stirring chamber, thereby avoiding direct contact between the stirring blade and the bottom of the stirring chamber, and making the concrete in the stirring chamber can be cleaned out more cleanly, thereby improving the concrete cleaning effect.

[0014] Preferably, a guiding cone surface is provided at the bottom of the stirring chamber, and the guiding cone surface is inclined downward from the center to the circumference.

[0015] By adopting the above technical solution, the use of the guide cone can, on the one hand, enable the concrete in the mixing chamber to flow more smoothly toward the side wall of the mixing chamber, and on the other hand, enable the concrete to flow fully in the mixing chamber, so that the cement and gravel can be more fully mixed, thereby improving the mixing effect of the concrete.

[0016] Preferably, a limited rotation seat is arranged at the bottom of the stirring chamber, the top height of the limited rotation seat is higher than the top height of the stirring body, and the central axis passes through the limited rotation seat.

[0017] By adopting the above technical solution, the use of the limit swivel seat can, on the one hand, assist in positioning the center axis, reduce the deviation of the center axis, and improve the stability of the use of the center axis; on the other hand, the limit swivel seat can improve the sealing position of the center axis and the mixing body, reduce the leakage of concrete, and improve the sealing of the mixing chamber.

[0018] Preferably, a buffer sheet is provided on the side wall of the limiting wedge block, and the buffer sheet abuts against the side wall of the limiting inclined groove.

[0019] By adopting the above technical solution, the use of a buffer sheet can reduce the rigid contact between the central shaft and the lifting seat, reduce damage to the central shaft and the lifting seat, and improve the stability of the fit between the central shaft and the lifting seat.

[0020] Preferably, the central axis passes through the lifting seat, a supporting swivel seat is provided at the bottom of the stirring body, a lever plate is rotatably connected to the supporting swivel seat, the bottom of the central axis is rotatably connected to the rotating seat, a lever slot which is plugged into and cooperates with the lever plate is provided on the side wall of the rotating seat, the switch door is lifted and connected to the stirring body, a connecting rod is plugged into the end of the lever plate away from the central axis, and the end of the connecting rod away from the lever plate is rotatably connected to the switch door.

[0021] By adopting the above technical solution, when the central shaft reverses, the limiting wedge block and the inclined groove drive the central shaft downward, and at this time the switch door is driven to rise, so that the switch door can be opened, thereby improving the convenience of using the switch door.

[0022] Preferably, the side wall of the stirring body is provided with two guide slides, the switch door is arranged between the two guide slides, and the opposite side walls of the two guide slides are provided with guide grooves that cooperate with the sliding of the switch door.

[0023] By adopting the above technical solution, the cooperation between the guide slide seat and the guide slide groove can enable the switch door to move up and down more smoothly, thereby improving the stability of the switch door.

[0024] Preferably, a sealing sheet is provided on one side of the switch door close to the stirring body, and the sealing sheet is used to seal the switch door and the stirring body. A sealing gasket is provided at the bottom of the switch door, and the sealing gasket abuts against the bottom of the discharge port.

[0025] By adopting the above technical solution, the use of sealing sheets and sealing pads can make the switch door more sealed when in use, thereby improving the sealing and stability of the stirring device.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. Put cement, gravel and water in a proportion into the mixing chamber, and then use multiple stirring blades to stir the materials in the mixing chamber. The inclined stirring blades can move the concrete at the bottom to the center. When there is a large amount of concrete at the center, the concrete will flow, so that the concrete in the mixing chamber can be fully mixed. After stirring for a certain period of time, open the switch door to discharge the concrete in the mixing chamber, drive the stirring blade to reverse, and then use the lifting component to make the stirring blade abut against the bottom of the mixing chamber, so that the concrete can move to the side wall of the mixing chamber and be discharged from the discharge port. With such a design, on the one hand, the concrete can be mixed more fully and the uniformity of concrete mixing can be improved. On the other hand, under the action of the stirring blades, the concrete in the mixing chamber can be fully discharged, reducing the residual concrete and improving the convenience of cleaning the mixing device. 2. When the driving member rotates forward, the limiting wedge rotates to the top of the limiting chute, pushing the center shaft upward and driving the stirring blade upward, so that the stirring blade can rotate smoothly in the stirring chamber, improving the convenience of concrete mixing; when the driving member rotates reversely, the limiting wedge rotates to the top of the limiting chute, pulling the center shaft downward and driving the stirring blade downward, so that the stirring blade abuts against the bottom of the stirring chamber, so that the concrete in the mixing chamber can be discharged more smoothly, improving the convenience of concrete cleaning; 3. When in use, the stirring blade moves toward the bottom of the stirring chamber. When the stirring blade reverses, the concrete in the stirring chamber pushes the sliding blade to move closer to the bottom of the stirring chamber, thereby avoiding direct contact between the stirring blade and the bottom of the stirring chamber, and allowing the concrete in the stirring chamber to be cleaned out more cleanly, thereby improving the concrete cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of a cement gravel mixing device according to an embodiment of the present application; Figure 2 This is a cross-sectional view of a cement gravel mixing device according to an embodiment of the present application; Figure 3 For the embodiment of this application Figure 2 A magnified schematic diagram of part A; Figure 4 For the embodiment of this application Figure 2 A magnified schematic diagram of part B; Figure 5 This is a schematic diagram of the expansion of the inner wall of the central hole mainly embodied in the embodiment of the present application; 1. Stirring chamber; 2. Stirring seat; 3. Switch door; 4. Guide slide; 5. Discharge port; 6. Guide seat; 7. Connecting plate; 8. Base; 9. Stirring rod; 10. Center axis; 11. Limiting swivel seat; 12. Stirring plate; 13. Commutator reducer; 14. Driving motor; 15. Guide cone; 16. Lifting seat; 17. Sealing plate; 18. Sealing pad; 19. Pushing slider; 20. Sliding plate; 21. Pushing compression spring; 22. Center hole; 23. Lever slot; 24. Connecting rod; 25. Lever plate; 26. Support swivel seat; 27. Limiting wedge block; 28. Limiting inclined groove; 29. ​​Buffer plate; 30. Sliding inclined surface; 31. Pushing slide groove. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1 - Figure 5 This application is described in further detail.

[0029] The embodiment of the present application discloses a cement gravel mixing device.

[0030] Reference Figure 1 and Figure 2 A cement gravel mixing device comprises a mixing body, the mixing body comprises a base 8 and a mixing seat 2, the base 8 is formed by welding a plurality of steel pipes, the mixing seat 2 is cylindrical, a cylindrical mixing chamber 1 is provided on the upper side of the mixing seat 2, four mixing rods 9 are rotatably connected in the mixing chamber 1, a mixing blade 12 for mixing cement and gravel is fixed at the bottom of the mixing rod 9, the mixing blade 12 is inclined in the tangential direction of its forward rotation along the circumference outward, and the bottom of the mixing blade 12 is arranged in contact with the bottom of the mixing chamber 1. A driving assembly for driving the plurality of mixing rods 9 to rotate is fixed on the mixing body, and the forward and reverse rotation of the mixing blade 12 is controlled by the driving assembly to achieve the purpose of mixing concrete. A lifting assembly for controlling the lifting and lowering of the mixing blade 12 is installed on the mixing body, the lifting assembly controls the mixing blade 12 to abut against the bottom of the mixing chamber 1, and the driving assembly controls the mixing blade 12 to reverse and clean the concrete. A discharge port 5 is provided on the side wall of the mixing chamber 1, and the discharge port 5 is rectangular, and a switch door 3 for closing the discharge port 5 is installed on the mixing body. The side wall of the mixing body is provided with a material guide seat 6, which is U-shaped, and the upper surface of the material guide seat 6 is arranged to be inclined downward and is used to guide the concrete discharged from the discharge port 5. With such a design, the concrete in the mixing chamber 1 can be mixed more fully, and the concrete can be cleaned more smoothly, reducing the residual concrete and improving the convenience of using the mixing device.

[0031] Reference Figure 1 and Figure 2The driving assembly includes a driving member fixed to the stirring body, and the driving member is composed of a driving motor 14 and a commutator reducer 13. A central shaft 10 is rotatably connected in the stirring chamber 1, and the top of the central shaft 10 is fixedly connected to four stirring rods 9; the driving member drives the central shaft 10 to rotate, and the two stirring rods 9 are symmetrically installed in the stirring chamber 1, and the multiple stirring rods 9 rotate on different rotating planes, so that the stirring blades 12 can stir the concrete more comprehensively. A limited rotation seat 11 is fixed at the bottom of the stirring chamber 1. The limited rotation seat 11 is cylindrical, and the top height of the limited rotation seat 11 is higher than the top height of the stirring body. The central shaft 10 passes through the limited rotation seat 11, which can not only achieve the purpose of sealing the central shaft 10, but also make the central shaft 10 rotate more stably, thereby improving the stability of the stirring device.

[0032] Reference Figure 3 and Figure 4 The lifting assembly includes a lifting seat 16 rotatably connected to the bottom of the stirring body, a first gear is arranged on the outer wall of the lifting seat 16, and a second gear meshing with the first gear is connected to the commutator reducer 13, and the purpose of driving the lifting seat 16 to rotate is achieved through the cooperation of the first gear and the second gear. Figure 5 A center hole 22 which is plugged into the center shaft 10 is provided on the lifting seat 16, and a limiting wedge block 27 is integrally formed on the side wall of the center shaft 10. The limiting wedge block 27 is in the shape of a parallelogram, and a limiting inclined groove 28 which is slidably matched with the limiting wedge block 27 is provided on the side wall of the center hole 22. The limiting inclined groove 28 is inclined downward along the tangential direction of the forward rotation of the center shaft 10, so that when the driving member drives the center shaft 10 to rotate forward, the limiting wedge block 27 can abut against the high part of the limiting inclined groove 28, raise the stirring blade 12, and enable the stirring blade 12 to stir the concrete more fully; when the driving member drives the center shaft 10 to reverse, the limiting wedge block 27 abuts against the low part of the limiting inclined groove 28, so that the stirring blade 12 abuts against the bottom of the stirring chamber 1, thereby achieving the purpose of cleaning the concrete. A buffer sheet 29 is fixed to the side wall of the limiting wedge block 27. The buffer sheet 29 adopts a rubber structure design. The buffer sheet 29 abuts against the side wall of the limiting inclined groove 28, so that the limiting wedge block 27 and the limiting inclined groove 28 can be softly connected, reducing the wear of the central shaft 10 and the lifting seat 16, and ensuring the service life of the connection between the central shaft 10 and the lifting seat 16.

[0033] Reference Figure 2 and Figure 3The bottom of the stirring blade 12 is provided with a sliding inclined surface 30, which is inclined downward along the positive rotation tangent direction of the stirring blade 12. The sliding inclined surface 30 is slidably connected with the sliding piece 20, which adopts a rubber structure. The sliding piece 20 is integrally formed with a plurality of push sliders 19 on the side close to the stirring blade 12. The push sliders 19 are trapezoidal in cross section. The trapezoidal push sliders 19 can make the sliding piece 20 more firmly connected to the stirring blade 12. The push sliders 19 are arranged at intervals along the length direction of the stirring blade 12. The sliding inclined surface 30 is provided with a plurality of push slides 31 that are slidably matched with the plurality of push slides 19. The push slides 31 are arranged along the rotation tangent direction of the stirring blade 12. A push compression spring 21 is installed in the push slide 31. The push compression spring 21 is used to push the sliding piece 20 to move along the reverse tangent direction of the stirring blade 12. When the stirring blade 12 is reversed, the pressure of the concrete will push the sliding blade 20 to slide downward, so that the stirring blade 12 is separated from the bottom of the stirring chamber 1 by the sliding blade 20, which can not only reduce the wear of the stirring blade 12 on the stirring chamber 1, but also enable the concrete at the bottom of the stirring chamber 1 to be more fully discharged, thereby improving the effect of cleaning the concrete. A guiding cone 15 is provided at the bottom of the stirring chamber 1, and the guiding cone 15 is inclined downward from the center to the circumference, so that the concrete can be cleaned more conveniently.

[0034] Reference Figure 3 and Figure 4 The central axis 10 passes through the lifting seat 16. A support rotating seat 26 is fixed at the bottom of the stirring body. A lever plate 25 is rotatably connected to the support rotating seat 26. The support rotating seat 26 is arranged close to the central axis 10, so that the end of the lever plate 25 away from the central axis 10 can have a larger up and down range. A rotating seat is rotatably connected to the bottom of the central axis 10. A lever slot 23 that plugs into the lever plate 25 is provided on the side wall of the rotating seat. The switch door 3 is lifted and connected to the stirring body. Two guide slides 4 are fixed on the side wall of the stirring body. The guide slides 4 are concave. A guide groove that slides with the switch door 3 is formed on the side of the two guide seats that are close to each other, so that the switch door 3 can be lifted and lowered more smoothly. A connecting plate 7 is fixed to the side wall of the switch door 3, and the connecting plate 7 is extended downward; a connecting rod 24 is inserted at the end of the lever plate 25 away from the central axis 10, and the end of the connecting rod 24 away from the lever plate 25 is rotatably connected to the connecting plate 7. The switch door 3 can be lifted and lowered when the central axis 10 moves up and down, thereby improving the convenience of opening and closing the lifting door. Refer to Figure 3 A sealing sheet 17 is fixed on one side of the switch door 3 close to the stirring body, and the sealing sheet 17 is used to seal the joint between the switch door 3 and the stirring body; a sealing gasket 18 is fixed on the bottom of the switch door 3, and the sealing gasket 18 abuts against the bottom of the discharge port 5, so that the switch door 3 can be better sealed and the effect of the use of the switch door 3 is improved.

[0035] The implementation principle of a cement gravel mixing device of the embodiment of the present application is as follows: when working, the driving member drives the lifting seat 16 to rotate, and under the action of the limiting wedge block 27 and the limiting chute 28, the central axis 10 is driven to rise, and the cement and gravel are fully mixed. After a period of mixing, the driving member drives the lifting seat 16 to reverse, and under the action of the limiting wedge block 27 and the limiting chute 28, the central axis 10 is lowered, on the one hand, the switch door 3 is driven to rise under the action of the lever plate 25 to achieve the effect of opening the switch door 3, and on the other hand, the stirring blade 12 is lowered and abutted against the bottom of the mixing chamber 1, so that the concrete in the mixing chamber 1 can be discharged smoothly, improving the convenience of concrete cleaning. With such a design, on the one hand, the concrete can be mixed more fully and the uniformity of concrete mixing can be improved, and on the other hand, under the action of the stirring blade 12, the concrete in the mixing chamber 1 can be fully discharged, reducing the residual concrete, and improving the convenience of cleaning the mixing device.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cement gravel mixing device, characterized in that: The invention comprises a stirring body, wherein a stirring chamber (1) is provided on the stirring body, a plurality of stirring rods (9) are rotatably connected in the stirring chamber (1), a stirring blade (12) for stirring cement and gravel is arranged at the bottom of the stirring rod (9), the stirring blade (12) is inclined in the outward direction of the circumference toward the tangent direction of its forward rotation, the bottom of the stirring blade (12) is arranged in contact with the bottom of the stirring chamber (1), a driving component for driving the plurality of stirring rods (9) to rotate is arranged on the stirring body, and a lifting component for controlling the lifting of the stirring blade (12) is arranged on the stirring body, and the lifting component controls the stirring blade (12) to abut against the stirring chamber (1). 1) bottom, the driving component controls the stirring blade (12) to reverse and clean the concrete, the side wall of the stirring chamber (1) is provided with a discharge port (5), and the stirring body is provided with a switch door (3) for closing the discharge port (5); the driving component comprises a driving member arranged at the bottom of the stirring body, a central shaft (10) is rotatably connected in the stirring chamber (1), the top of the central shaft (10) is connected to the top of a plurality of stirring rods (9), the driving member drives the central shaft (10) to rotate, the stirring rods (9) are symmetrically arranged in the stirring chamber (1), and the plurality of stirring rods (9) rotate on different rotation planes; the lifting group The component comprises a lifting seat (16) rotatably arranged on the stirring body, the driving component is used to drive the lifting seat (16) to rotate, the lifting seat (16) is provided with a center hole (22) plug-fitted with the center axis (10), the side wall of the center axis (10) is provided with a limiting wedge block (27), the side wall of the center hole (22) is provided with a limiting inclined groove (28) slidably matched with the limiting wedge block (27), and the limiting inclined groove (28) is inclined downwardly along the positive rotation tangent direction of the center axis (10); the bottom of the stirring blade (12) is provided with a sliding inclined surface (30), and the sliding inclined surface (30) is provided along the positive rotation tangent direction of the stirring blade (12). The sliding inclined surface (30) is inclined downward in the direction of the rotation tangent, and a sliding sheet (20) is slidably arranged on the sliding inclined surface (30). A plurality of pushing sliders (19) are arranged on the side of the sliding sheet (20) close to the stirring sheet (12). A plurality of pushing grooves (31) are opened on the sliding inclined surface (30) and are slidably matched with the pushing sliders (19). The pushing grooves (31) are opened along the tangential direction of the rotation of the stirring sheet (12). A pushing compression spring (21) is arranged in the pushing groove (31) to abut against the pushing slider (19). The pushing compression spring (21) is used to push the sliding sheet (20) to move along the reverse tangential direction of the stirring sheet (12).

2. A cement gravel mixing device according to claim 1, characterized in that: The bottom of the stirring chamber (1) is provided with a guide cone surface (15), and the guide cone surface (15) is inclined from the center of the circle toward the circumference and downward.

3. A cement gravel mixing device according to claim 2, characterized in that: A limited rotation seat (11) is arranged at the bottom of the stirring chamber (1), the top height of the limited rotation seat (11) is higher than the top height of the stirring body, and the central axis (10) passes through the limited rotation seat (11).

4. A cement gravel mixing device according to claim 1, characterized in that: The side wall of the limiting wedge block (27) is provided with a buffer sheet (29), and the buffer sheet (29) abuts against the side wall of the limiting inclined groove (28).

5. A cement gravel mixing device according to claim 4, characterized in that: The central axis (10) passes through the lifting seat (16), a supporting rotating seat (26) is arranged at the bottom of the stirring body, a lever plate (25) is rotatably connected to the supporting rotating seat (26), the bottom of the central axis (10) is rotatably connected to the rotating seat, a lever slot (23) for plugging and matching with the lever plate (25) is provided on the side wall of the rotating seat, the switch door (3) is connected to the stirring body in a lifting manner, a connecting rod (24) is plugged into one end of the lever plate (25) away from the central axis (10), and the connecting rod (24) is rotatably connected to the switch door (3) at one end away from the lever plate (25).

6. A cement gravel mixing device according to claim 5, characterized in that: The side wall of the stirring body is provided with two guide slides (4), the switch door (3) is arranged between the two guide slides (4), and the opposite side walls of the two guide slides (4) are provided with guide slide grooves that slide with the switch door (3).

7. A cement gravel mixing device according to claim 6, characterized in that: A sealing sheet (17) is provided on one side of the switch door (3) close to the stirring body, and the sealing sheet (17) is used to seal the switch door (3) and the stirring body. A sealing gasket (18) is provided at the bottom of the switch door (3), and the sealing gasket (18) abuts against the bottom of the discharge port (5).

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