A cement crushed stone mixing device

Abstract

The present application discloses a cement gravel mixing device, which relates to the field of cement mixing. It includes a mixing main body, a mixing cavity is provided on the mixing main body, a plurality of mixing rods are rotatably connected in the mixing cavity, and mixing blades for mixing cement and gravel are arranged at the bottom of the mixing rods. The mixing blades are inclined in the direction of the tangent of its forward rotation along the circumferential outward direction, and the bottom of the mixing blades is arranged close to the bottom of the mixing cavity. A driving assembly for driving the rotation of the plurality of mixing rods is arranged on the mixing main body, and a lifting assembly for controlling the lifting of the mixing blades is arranged on the mixing main body. The lifting assembly controls the mixing blades to abut against the bottom of the mixing cavity, and the driving assembly controls the mixing blades to rotate reversely and clean the concrete. A discharge port is provided on the side wall of the mixing cavity, and a switch door for closing the discharge port is arranged on the mixing main body. This application reduces the residue of concrete in the mixing device, reduces the waste of concrete, and improves the convenience of concrete cleaning.

Description

Technical Field

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

[0002] At present, the cement gravel mixing method refers to the method for mixing cement gravel, which can be divided into static mixing and vibration mixing. The cement gravel mixing method refers to the mixing method for cement stabilized gravel during the construction process. A good mixing method can prevent the cement in the cement stabilized gravel from agglomerating and make the cement evenly dispersed in the coarse aggregate.

[0003] In the prior art, a concrete mixing device includes a concrete mixing main body. A mixing cavity for mixing concrete is formed on the concrete main body. A plurality of mixing rods are rotatably connected in the mixing cavity. Through the mixing rods, cement and gravel are fully mixed. A driving device for driving a plurality of mixing rods to rotate is arranged at the bottom of the concrete main body; a discharge port is formed at the bottom of the concrete main body, and a rotating sealing plate is rotatably connected to the concrete main body. The rotating sealing plate is used to block the discharge port and seal the discharge port, so that the concrete can be more fully mixed in the mixing cavity.

[0004] In view of the above prior art, during discharging, the rotating sealing plate is rotated to open the discharge port, so that the mixed concrete can be discharged. Since the mixing cavity is usually arranged in a cylindrical shape, the concrete at the bottom is difficult to discharge, resulting in a large amount of concrete remaining in the mixing cavity, causing a certain waste. At this time, the staff needs to use tools to push out the large amount of concrete to reduce the remaining concrete, which will greatly reduce the convenience of using the concrete mixing device and needs to be improved urgently. Summary of the Invention

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

[0006] The cement gravel mixing device provided by this application adopts the following technical solutions:

[0007] It includes a mixing main body. A mixing cavity is formed on the mixing main body. A plurality of mixing rods are rotatably connected in the mixing cavity. Mixing blades for mixing cement and gravel are arranged at the bottom of the mixing rods. The mixing blades are inclined in the circumferential outward direction along the tangent direction of their forward rotation. A driving component for driving a plurality of mixing rods to rotate is arranged on the mixing main body. A lifting component for controlling the lifting of the mixing blades is arranged on the mixing main body. The lifting component controls the mixing blades to abut against the bottom of the mixing cavity. The driving component controls the mixing blades to rotate in reverse to clean the concrete. A discharge port is formed on the side wall of the mixing cavity. A switch door for closing the discharge port is arranged on the mixing main body.

[0008] By adopting the above technical solution, during operation, cement, gravel and water are proportionally placed into the mixing cavity, and then a plurality of mixing blades are used to mix the materials in the mixing cavity. The inclined mixing blades can make the concrete at the bottom move towards the center. After the amount of concrete at the center position is large, the concrete will flow, so that the concrete in the mixing cavity can be fully mixed; after mixing for a certain period of time, the switch door is opened to discharge the concrete in the mixing cavity. The driving assembly drives the mixing blades to rotate in the reverse direction, and in cooperation with the lifting assembly, the mixing blades are abutted against the bottom of the mixing cavity, so that the concrete can move towards the side wall of the mixing cavity and the concrete is discharged at the discharge port; with such a design, on the one hand, the concrete can be more fully mixed, improving the uniformity of concrete mixing, and on the other hand, under the action of the mixing blades, the concrete in the mixing cavity can be fully discharged, reducing the residue of the concrete and improving the convenience of cleaning the mixing device.

[0009] Preferably, the driving assembly includes a driving member arranged at the bottom of the mixing main body. A central shaft is rotatably connected in the mixing cavity. The top of the central shaft is connected to the tops of a plurality of mixing rods. The driving member drives the central shaft to rotate. The mixing rods are symmetrically arranged in the mixing cavity, and the plurality of mixing rods rotate on different rotating planes.

[0010] By adopting the above technical solution, the plurality of symmetrically designed mixing rods can balance the torque generated during concrete mixing at the central shaft, so that the central shaft can rotate more stably and smoothly, reduce the offset of the central shaft, reduce the resistance of the central shaft to rotate, and improve the service life of the mixing device.

[0011] Preferably, the lifting assembly includes a lifting seat rotatably arranged on the mixing main body. The driving member is used to drive the lifting seat to rotate. A central hole is formed in the lifting seat and is in plug-in fit with the central shaft. A limiting wedge block is arranged on the side wall of the central shaft. A limiting inclined groove is formed in the side wall of the central hole and is in sliding fit with the limiting wedge block. The limiting inclined groove is inclined downward along the tangent direction of the forward rotation of the central shaft.

[0012] By adopting the above technical solution, when the driving member rotates forward, the limiting wedge block rotates to the top of the limiting inclined groove, pushing the central shaft to rise and driving the mixing blades to rise, so that the mixing blades can rotate smoothly in the mixing cavity, improving the convenience of concrete mixing; when the driving member rotates in the reverse direction, the limiting wedge block rotates to the bottom of the limiting inclined groove, pulling the central shaft downward and driving the mixing blades to move downward, so that the mixing blades are abutted against the bottom of the mixing cavity, making the concrete in the mixing cavity discharge more smoothly and improving the convenience of concrete cleaning.

[0013] Preferably, a sliding inclined surface is formed at the bottom of the stirring blade. The sliding inclined surface is inclined downward along the forward rotation tangent direction of the stirring blade. A sliding piece is slidably arranged on the sliding inclined surface. A plurality of pushing sliders are arranged on the side of the sliding piece close to the stirring blade. A plurality of pushing chutes which are slidably matched with the pushing sliders are formed on the sliding inclined surface. The pushing chutes are arranged along the rotation direction of the stirring blade. A pushing compression spring which abuts against the pushing slider is arranged in the pushing chute. The pushing compression spring is used for pushing the sliding piece to move along the tangent direction of the stirring blade.

[0014] By adopting the above technical scheme, during use, the stirring blade moves towards the bottom of the stirring cavity. When the stirring blade rotates reversely, the concrete in the stirring cavity pushes the sliding piece to move towards the bottom of the stirring cavity, so that the direct contact between the stirring blade and the bottom of the stirring cavity can be avoided, and the concrete in the stirring cavity can be cleaned out more cleanly, improving the cleaning effect of the concrete.

[0015] Preferably, a guiding conical surface is formed at the bottom of the stirring cavity. The guiding conical surface is inclined downward from the center to the circumferential side.

[0016] By adopting the above technical scheme, on the one hand, the guiding conical surface can make the concrete in the stirring cavity flow more smoothly towards the side wall of the stirring cavity, and on the other hand, it can make the concrete flow fully in the stirring cavity, enabling the cement and gravel to be mixed more fully, improving the mixing effect of the concrete.

[0017] Preferably, a limiting rotating seat is arranged at the bottom of the stirring cavity. The height of the top of the limiting rotating seat is higher than the height of the top of the stirring main body. The central shaft penetrates through the limiting rotating seat.

[0018] By adopting the above technical scheme, using the limiting rotating seat can, on the one hand, assist in positioning the central shaft, reduce the deviation of the central shaft, improve the stability of the use of the central shaft, and on the other hand, the limiting rotating seat can raise the sealing position between the central shaft and the stirring main body, reduce the leakage of concrete, and improve the sealing performance of the stirring cavity.

[0019] Preferably, a buffer piece is arranged on the side wall of the limiting wedge block. The buffer piece abuts against the side wall of the limiting inclined groove.

[0020] By adopting the above technical scheme, using the buffer piece can reduce the rigid contact between the central shaft and the lifting seat, reduce the damage to the central shaft and the lifting seat, and improve the stability of the cooperation between the central shaft and the lifting seat.

[0021] Preferably, the central axis penetrates through the lifting seat, a supporting rotating seat is arranged at the bottom of the stirring main body, a lever plate is rotatably connected to the supporting rotating seat, the bottom of the central axis is rotatably connected to a rotating seat, a lever slot which is in plug-in fit with the lever plate is formed in the side wall of the rotating seat, the switch door is connected to the stirring main body in a lifting manner, a connecting rod is inserted at one end of the lever plate far away from the central axis, and the end of the connecting rod far away from the lever plate is rotatably connected to the switch door.

[0022] By adopting the above technical scheme, when the central axis rotates reversely, the limiting wedge block drives the central axis to descend under the action of the inclined plane and the inclined groove, and at this time, the switch door is driven to rise, so that the switch door can be opened, and the convenience of using the switch door is improved.

[0023] Preferably, two guiding sliding seats are arranged on the side wall of the stirring main body, the switch door is arranged between the two guiding sliding seats, and guiding sliding grooves which are in sliding fit with the switch door are formed in the opposite side walls of the two guiding sliding seats.

[0024] By adopting the above technical scheme, the cooperation between the guiding sliding seat and the guiding sliding groove can enable the switch door to move up and down more smoothly, and the stability of using the switch door is improved.

[0025] Preferably, a sealing sheet is arranged on one side of the switch door close to the stirring main body, the sealing sheet is used for sealing the switch door and the stirring main body, a sealing gasket is arranged at the bottom of the switch door, and the sealing gasket abuts against the bottom of the discharge port.

[0026] By adopting the above technical scheme, the use of the sealing sheet and the sealing gasket can make the switch door more sealed during use, and the sealing performance and stability of the stirring device are improved.

[0027] In summary, the present application includes at least the following beneficial technical effects:

[0028] 1. Cement, crushed stones and water are proportionally put into the stirring cavity, and then the materials in the stirring cavity are stirred by a plurality of stirring blades. The inclined stirring blades can make the concrete at the bottom move towards the center. After the amount of concrete at the center position is large, the concrete will flow, so that the concrete in the stirring cavity can be fully mixed; after stirring for a certain time, the switch door is opened to discharge the concrete in the stirring cavity. The driving component drives the stirring blades to rotate reversely, and then in cooperation with the lifting component, the stirring blades are abutted against the bottom of the stirring cavity, so that the concrete can move towards the side wall of the stirring cavity and the concrete is discharged from the discharge port; with such a design, on the one hand, the concrete can be more fully mixed, improving the uniformity of concrete mixing, and on the other hand, under the action of the stirring blades, the concrete in the stirring cavity can be fully discharged, reducing the residue of concrete and improving the convenience of cleaning the stirring device;

[0029] 2. When the driving part rotates forward, the limiting wedge block rotates to the top of the limiting inclined groove, pushes the central axis to rise, and drives the stirring blade to rise, enabling the stirring blade to rotate smoothly in the stirring cavity and improving the convenience of concrete mixing; when the driving part rotates reversely, the limiting wedge block rotates to the bottom of the limiting inclined groove, pulls the central axis downward, and drives the stirring blade to move downward, making the stirring blade abut against the bottom of the stirring cavity, so that the concrete in the stirring cavity can be discharged more smoothly and the convenience of concrete cleaning is improved;

[0030] 3. During use, when the stirring blade moves towards the bottom of the stirring cavity and rotates reversely, the concrete in the stirring cavity pushes the sliding piece to move towards the bottom of the stirring cavity, which can avoid the direct contact between the stirring blade and the bottom of the stirring cavity and enable the concrete in the stirring cavity to be cleaned more cleanly, improving the effect of concrete cleaning. Description of the Drawings

[0031] Figure 1 is a schematic diagram of the overall structure of a cement and gravel mixing device according to an embodiment of the present application;

[0032] Figure 2 is a cross-sectional view of a cement and gravel mixing device according to an embodiment of the present application;

[0033] Figure 3 is an enlarged schematic view of part A in an embodiment of the present application Figure 2 ;

[0034] Figure 4 is an enlarged schematic view of part B in an embodiment of the present application Figure 2 ;

[0035] Figure 5 is an unfolded schematic view mainly showing the inner wall of the central hole in an embodiment of the present application;

[0036] Reference numerals: 1, stirring cavity; 2, stirring seat; 3, switch door; 4, guiding sliding seat; 5, discharge port; 6, guiding seat; 7, connecting plate; 8, base; 9, stirring rod; 10, central axis; 11, limiting rotating seat; 12, stirring blade; 13, commutator speed reducer; 14, driving motor; 15, guiding conical surface; 16, lifting seat; 17, sealing piece; 18, sealing gasket; 19, pushing slider; 20, sliding piece; 21, pushing compression spring; 22, central hole; 23, lever slot; 24, connecting rod; 25, lever plate; 26, supporting rotating seat; 27, limiting wedge block; 28, limiting inclined groove; 29, buffer piece; 30, sliding inclined surface; 31, pushing sliding groove. Detailed Description of the Embodiment

[0037] The following further Figure 1 - Figure 5 describes the present application in detail with reference to the attached drawings.

[0038] An embodiment of the present application discloses a cement gravel mixing device.

[0039] Referring to Figure 1 and Figure 2 A cement gravel mixing device includes a mixing main body, the mixing main body includes a base 8 and a mixing seat 2. The base 8 is composed of multiple steel pipes welded together. The mixing seat 2 is cylindrical. A cylindrical mixing cavity 1 is provided on the upper side of the mixing seat 2. Four mixing rods 9 are rotatably connected in the mixing cavity 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 circumferentially outward direction towards the tangent direction of its forward rotation. The bottom of the mixing blade 12 is attached to the bottom of the mixing cavity 1. A driving component for driving multiple mixing rods 9 to rotate is fixed on the mixing main body. By controlling the forward and reverse rotation of the mixing blade 12 through the driving component, the purpose of mixing concrete is achieved. A lifting component for controlling the lifting of the mixing blade 12 is installed on the mixing main body. The lifting component controls the mixing blade 12 to abut against the bottom of the mixing cavity 1, and the driving component controls the mixing blade 12 to rotate reversely to clean the concrete. A discharge port 5 is provided on the side wall of the mixing cavity 1. The discharge port 5 is rectangular. A switch door 3 for closing the discharge port 5 is installed on the mixing main body. A material guiding seat 6 is provided on the side wall of the mixing main body. The material guiding seat 6 is U-shaped. The upper surface of the material guiding seat 6 is inclined downward and is used for guiding the concrete discharged from the discharge port 5. With such a design, the concrete in the mixing cavity 1 can be mixed more fully, and the concrete can be cleaned more smoothly, reducing the residue of the concrete and improving the convenience of using the mixing device.

[0040] Referring to Figure 1 and Figure 2 The driving component includes a driving part fixed to the mixing main body. The driving part is composed of a driving motor 14 and a commutator reducer 13. A central shaft 10 is rotatably connected in the mixing cavity 1. The top of the central shaft 10 is fixedly connected to the four mixing rods 9. The driving part drives the central shaft 10 to rotate. Two mixing rods 9 are symmetrically installed in the mixing cavity 1, and multiple mixing rods 9 rotate on different rotating surfaces, so that the mixing blade 12 can mix the concrete more comprehensively. A limiting rotating seat 11 is fixed at the bottom of the mixing cavity 1. The limiting rotating seat 11 is cylindrical. The height of the top of the limiting rotating seat 11 is higher than the height of the top of the mixing main body. The central shaft 10 passes through the limiting rotating 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, improving the stability of using the mixing device.

[0041] Referring to Figure 3 and Figure 4, the lifting assembly includes a lifting seat 16 rotatably connected to the bottom of the mixing main body. A first gear is provided on the outer wall of the lifting seat 16, and a second gear meshing with the first gear is connected to the commutator speed reducer 13. The rotation of the lifting seat 16 is driven by the cooperation of the first gear and the second gear. Refer to Figure 5 , a central hole 22 inserted and matched with the central shaft 10 is formed in the lifting seat 16. A limiting wedge 27 is integrally formed on the side wall of the central shaft 10. The limiting wedge 27 is in the shape of a parallelogram. A limiting inclined groove 28 slidably matched with the limiting wedge 27 is formed on the side wall of the central hole 22. The limiting inclined groove 28 is inclined downward along the tangent direction of the forward rotation of the central shaft 10. Therefore, when the driving member drives the central shaft 10 to rotate forward, the limiting wedge 27 can abut against the higher part of the limiting inclined groove 28, raising the mixing blade 12 and enabling the mixing blade 12 to mix the concrete more sufficiently; when the driving member drives the central shaft 10 to rotate reversely, the limiting wedge 27 abuts against the lower part of the limiting inclined groove 28, making the mixing blade 12 abut against the bottom of the mixing chamber 1, so as to achieve the purpose of cleaning the concrete. A buffer sheet 29 is fixed on the side wall of the limiting wedge 27. The buffer sheet 29 is designed with a rubber structure. The buffer sheet 29 abuts against the side wall of the limiting inclined groove 28, so that the limiting wedge 27 and the limiting inclined groove 28 can be softly connected, reducing the wear between 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.

[0042] Refer to Figure 2 and Figure 3 , a sliding inclined surface 30 is formed at the bottom of the mixing blade 12. The sliding inclined surface 30 is inclined downward along the tangent direction of the forward rotation of the mixing blade 12. A sliding sheet 20 is slidably connected to the sliding inclined surface 30. The sliding sheet 20 is made of rubber structure. A plurality of pushing sliders 19 are integrally formed on the side of the sliding sheet 20 close to the mixing blade 12. The cross section of the pushing slider 19 is trapezoidal. The trapezoidal pushing slider 19 can make the sliding sheet 20 more firmly slidably connected to the mixing blade 12. The pushing sliders 19 are arranged at intervals along the length direction of the mixing blade 12. A plurality of pushing chutes 31 slidably matched with the plurality of pushing sliders 19 are formed on the sliding inclined surface 30. The pushing chutes 31 are arranged along the rotation tangent direction of the mixing blade 12. A pushing compression spring 21 is installed in the pushing chute 31. The pushing compression spring 21 is used to push the sliding sheet 20 to move along the reverse rotation tangent direction of the mixing blade 12. When the mixing blade 12 rotates reversely, the pressure of the concrete will push the sliding sheet 20 to slide downward, separating the mixing blade 12 from the bottom of the mixing chamber 1 through the sliding sheet 20. This can not only reduce the wear of the mixing blade 12 on the mixing chamber 1, but also enable the concrete at the bottom of the mixing chamber 1 to be discharged more sufficiently, improving the effect of cleaning the concrete. A guiding conical surface 15 is formed at the bottom of the mixing chamber 1. The guiding conical surface 15 is inclined downward from the center to the periphery, so that the concrete can be cleaned more conveniently.

[0043] Refer to Figure 3 andFigure 4 , the central axis 10 penetrates through the lifting seat 16. A supporting rotating seat 26 is fixed at the bottom of the stirring main body. A lever plate 25 is rotatably connected to the supporting rotating seat 26. The supporting rotating seat 26 is arranged close to the central axis 10, which can make the amplitude of the end of the lever plate 25 far from the central axis 10 larger up and down. The bottom of the central axis 10 is rotatably connected to a rotating seat. A lever slot 23 which is inserted and matched with the lever plate 25 is arranged on the side wall of the rotating seat. The switch door 3 is connected to the stirring main body in a lifting manner. Two guiding sliding seats 4 are fixed on the side wall of the stirring main body. The guiding sliding seats 4 are concave-shaped. A guiding chute which is slidably matched with the switch door 3 is formed on one side of the two guiding seats close to each other, so that the switch door 3 can be lifted more smoothly. A connecting plate 7 is fixed on the side wall of the switch door 3, and the connecting plate 7 extends downward; one end of the lever plate 25 far from the central axis 10 is inserted with a connecting rod 24, and one end of the connecting rod 24 far from the lever plate 25 is rotatably connected to the connecting plate 7. When the central axis 10 moves up and down, the switch door 3 can be driven to lift, improving the convenience of opening and closing the lifting door. Refer to Figure 3 , a sealing piece 17 is fixed on one side of the switch door 3 close to the stirring main body. The sealing piece 17 is used to seal the joint between the switch door 3 and the stirring main body; a sealing gasket 18 is fixed at 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, improving the use effect of the switch door 3.

[0044] The implementation principle of a cement and gravel mixing device in an embodiment of this application is as follows: during operation, the driving member drives the lifting seat 16 to rotate. Under the action of the limiting wedge 27 and the limiting inclined groove 28, the central axis 10 is driven to rise, and the cement and gravel are fully stirred. After a period of stirring, the driving member drives the lifting seat 16 to rotate in the reverse direction. Under the action of the limiting wedge 27 and the limiting inclined groove 28, the central axis 10 descends. On the one hand, under the action of the lever plate 25, the switch door 3 is driven to rise, achieving the effect of opening the switch door 3. On the other hand, the mixing blades 12 descend and abut against the bottom of the mixing cavity 1, so that the concrete in the mixing cavity 1 can be smoothly discharged, improving the convenience of cleaning the concrete. With such a design, on the one hand, the concrete can be more fully mixed, improving the uniformity of concrete mixing. On the other hand, under the action of the mixing blades 12, the concrete in the mixing cavity 1 can be fully discharged, reducing the residue of the concrete and improving the convenience of cleaning the mixing device.

[0045] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this 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 tangential direction of its positive rotation along the circumference outward, a driving component for driving the plurality of stirring rods (9) to rotate is arranged on the stirring body, a lifting component for controlling the lifting of the stirring blade (12) is arranged on the stirring body, the lifting component controls the stirring blade (12) to abut against the bottom of the stirring chamber (1), and the driving component controls the stirring blade (12) to abut against the bottom of the stirring chamber (1). 2) inverting and cleaning the concrete, the side wall of the mixing chamber (1) is provided with a discharge port (5), and the mixing body is provided with a switch door (3) for closing the discharge port (5); the driving assembly comprises a driving member arranged at the bottom of the mixing body, a central shaft (10) is rotatably connected in the mixing chamber (1), the top of the central shaft (10) is connected to the tops of a plurality of mixing rods (9), the driving member drives the central shaft (10) to rotate, the mixing rods (9) are symmetrically arranged in the mixing chamber (1), and the plurality of mixing rods (9) rotate on different rotation planes; the lifting assembly comprises a driving member rotatably arranged on the mixing body The lifting seat (16) is provided on the body, the driving member is used to drive the lifting seat (16) to rotate, the lifting seat (16) is provided with a center hole (22) plugged with the center axis (10), the side wall of the center axis (10) is provided with a limit wedge block (27), the side wall of the center hole (22) is provided with a limit inclined groove (28) slidingly matched with the limit wedge block (27), the limit inclined groove (28) is inclined downward 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), the sliding inclined surface (30) is downward along the positive rotation tangent direction of the stirring blade (12) The sliding inclined surface (30) is provided with a sliding sheet (20) for sliding movement, and a plurality of pushing sliders (19) are provided on the side of the sliding inclined surface (30) close to the stirring sheet (12). A plurality of pushing grooves (31) for sliding movement with the pushing sliders (19) are provided on the sliding inclined surface (30), and the pushing grooves (31) are provided along the tangential direction of the rotation of the stirring sheet (12). A pushing compression spring (21) for contacting the pushing slider (19) is provided in the pushing grooves (31), and 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 opened from the center of the circle toward the circumference and inclined 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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