A device for preventing fine stone concrete from solidifying

By designing a device including box, mixing assembly and opening and closing assembly, the problem of initial settling of fine stone concrete in secondary structure construction is solved, the effective storage and transportation of concrete is realized, and the quality risk and vehicle stay cost are reduced.

CN113650159BInactive Publication Date: 2025-04-08SICHUAN TAILONG CONSTR GRP CO LTD +1
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Patent Information

Application Number
CN202110991597.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-08-27
Publication Date
2025-04-08
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The prior art is difficult to effectively store and transport the fine stone concrete required for secondary structures, resulting in the initial setting of concrete losing plasticity, affecting building quality, and increasing vehicle stay costs.

Method used

A device including a box, a stirring assembly and an opening and closing assembly is designed. By providing a storage tank and a discharge pipe on the top of the box, the agitating assembly is driven to stir the concrete by using the driving assembly, and blocking sunlight and impurities through the cover plate.

Benefits of technology

Effectively prevent concrete from initially setting in the storage tank, reducing quality problems and vehicle stay costs caused by the loss of plasticity of the concrete, and simplifying the cleaning process.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention provides a device for preventing fine stone concrete from solidifying, comprising: a box body, the top of which is recessed to form a receiving groove for receiving concrete, a discharge pipe for discharging the concrete in the receiving groove is arranged on the side wall of the box body, and a bracket is arranged at the bottom of the box body; a cover plate, the cover plate is rotatably arranged on the top of the box body through an installation component, and the cover plate is used to open and close the opening at the top of the receiving groove; a stirring component, which is rotatably arranged in the receiving groove; a driving component, the driving component is arranged at the bottom of the box body through a mounting bracket, and the driving component is used to drive the stirring component to stir the concrete in the receiving groove; and an opening and closing component, which is arranged on the side wall of the bracket, and the opening and closing component is used to open and close the discharge pipe, thereby solving the problem in the prior art that it is inconvenient to store concrete used in secondary structures of buildings.
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Description

Technical Field

[0001] The invention relates to the technical field of building construction equipment, in particular to a device for preventing fine stone concrete from solidifying. Background Art

[0002] With the rapid development of urbanization, there are more and more high-rise and super-high-rise buildings. With the gradual breakthrough of building height, the pressure of vertical transportation of concrete is increasing. For secondary structures, the volume of concrete required for their structural columns, door lintels, etc. is small, and the cost of using traditional pumping methods is high, and the quality of sporadic concrete pumping cannot be guaranteed. Therefore, the pouring method can only use the original bucket truck plus manual method, and use vertical transportation tools such as construction elevators for secondary transportation. Although this method solves the transportation problem, the time cost is also increased. In order to control costs, commercial concrete stations cannot guarantee that commercial concrete tank trucks will wait for a long time. In order to save vehicle costs, traditional construction sites generally use storage equipment such as hoppers to temporarily store concrete. However, because concrete is time-sensitive, if it cannot be poured within the specified time, the concrete reaches the initial setting time and begins to lose plasticity, the quality cannot be guaranteed. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a device for preventing fine stone concrete from solidifying, which solves the problem in the prior art that it is inconvenient to store concrete used for secondary structures of buildings.

[0004] According to an embodiment of the present invention, a device for preventing fine stone concrete from solidifying comprises: a box body, the top of which is recessed to form a receiving groove for receiving concrete, a discharge pipe for discharging the concrete in the receiving groove is arranged on the side wall of the box body, and a bracket is arranged at the bottom of the box body; a cover plate, the cover plate is rotatably arranged on the top of the box body through an installation assembly, and the cover plate is used to open and close the opening at the top of the receiving groove; a stirring assembly, which is rotatably arranged in the receiving groove; a driving assembly, the driving assembly is arranged at the bottom of the box body through a mounting bracket, and the driving assembly is used to drive the stirring assembly to stir the concrete in the receiving groove; and an opening and closing assembly, which is arranged on the side wall of the bracket, and the opening and closing assembly is used to open and close the discharge pipe.

[0005] Compared with the prior art, the present invention has the following beneficial effects: a storage tank is provided on the top of the box body to store concrete discharged from a concrete tank truck, and a driving assembly is used to drive a stirring assembly to stir the concrete in the storage tank, thereby effectively preventing the concrete from initially setting and losing its plasticity in the storage tank, thereby affecting the quality of the building, and at the same time reducing the cost of the tank truck staying at the construction site for a long time in order to prevent the concrete from losing its plasticity due to not being used up for a long time after being discharged from the tank truck; further, a cover plate is provided on the top of the box body to effectively block sunlight from irradiating the concrete and also prevent impurities from entering the storage tank; specifically, in order to avoid the residual concrete from condensing in the storage tank and damaging the device after multiple uses of the device, the device needs to be cleaned regularly after use, and when cleaning, the cover plate is operated to open the opening at the top of the storage tank.

[0006] Furthermore, the mounting assembly includes a mounting shaft, a mounting column and a hinge mechanism. The mounting column is fixed to the side wall of the box body. The mounting shaft is L-shaped. One end of the mounting shaft is fixed to the top of the cover plate. The other end of the mounting shaft is hinged to the top of the mounting column through the hinge mechanism. A handle is also provided at the top of one end of the cover plate.

[0007] Furthermore, the articulated mechanism includes: a mounting cylinder, a mounting rod and a mounting block, the mounting cylinder is fixed on the top of the mounting column, the mounting cylinder and the mounting shaft are staggered, the mounting rod is rotatably set on the mounting cylinder, the mounting rod and the mounting cylinder are coaxially set, the mounting shaft and the mounting rod are fixedly connected, the mounting block is fixedly set on the side wall of the mounting cylinder, and the mounting block is provided with a locking member for locking or releasing the mounting rod.

[0008] Furthermore, the locking member includes: a limit pin, a first spring and a pull rope. The side wall recesses of the mounting block and the mounting tube are tightly attached to form a first mounting groove. The limit pin is slidably arranged in the first mounting groove. The first spring is also arranged in the first mounting groove. A limit groove for inserting the limit pin is arranged on the mounting rod. When the cover plate is rotated to a vertical state, the limit pin passes through the mounting tube and is inserted into the limit groove under the elastic force of the first spring. The limit pin is slidably connected to the mounting tube. One end of the pull rope is fixed to the end of the limit pin away from the mounting rod, and the other end of the pull rope passes through the mounting block. A pull ring is fixedly arranged on the end of the pull rope passing through the mounting block.

[0009] Preferably, a hook for hanging the pull ring is also provided on the side wall of the mounting block.

[0010] Furthermore, the opening and closing assembly includes: a closing plate, a mounting seat and a limit block. A support plate is provided on the side wall of the bracket. The support plate and the discharge pipe are located on the same side of the box body. The mounting seat is fixedly arranged on the top of the support plate. One end of the closing plate vertically passes through the support plate and the box body from the bottom of the support plate and is inserted into the discharge pipe. The closing plate is used to close the discharge pipe. The closing plate is slidingly connected to the support plate and the box body. The closing plate is dynamically sealed with the discharge pipe. The limit block is fixed to the side wall of the closing plate by bolts. The limit block is used to prevent the closing plate from detaching from the discharge pipe. At least one locking hole is provided on the closing plate. A clamping mechanism for cooperating with the locking hole to lock the closing plate is provided on the mounting seat.

[0011] Furthermore, the clamping mechanism includes: a locking rod, a second spring and a push rod. The side wall of the mounting seat is recessed near the closing plate to form a second mounting groove. The top of the mounting seat is provided with a slide groove connected to the second mounting groove. The locking rod is slidably disposed in the second mounting groove. The second spring is also disposed in the second mounting groove. Under the elastic force of the second spring, the locking rod is inserted into the locking hole. The push rod is slidably disposed in the slide groove. One end of the push rod is fixedly connected to the side wall of the locking rod.

[0012] Furthermore, the stirring assembly includes: a stirring blade and a rotating shaft vertically and rotatably arranged at the bottom of the storage tank, one end of the rotating shaft passes through the bottom of the box body, the rotating shaft is rotatably and sealedly connected to the box body, the driving assembly is used to drive the rotating shaft to rotate, the stirring blade is at least one piece, and the stirring blade is evenly arranged on the side wall of the rotating shaft by bolts.

[0013] Furthermore, the driving assembly includes: a belt, a pulley and a motor. The motor is fixed on the mounting frame. There are two pulleys, which are respectively fixed to the output end of the motor and one end of the rotating shaft passing through the bottom of the box. The belt is sleeved on the two pulleys. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0015] Figure 2 for Figure 1 Enlarged view of point B in the middle.

[0016] Figure 3 Schematic diagram of the installation structure of the mounting rod.

[0017] Figure 4 It is a schematic diagram of the structure when the mounting rod is locked.

[0018] Figure 5 for Figure 1 Enlarged view of point A in the middle.

[0019] Figure 6 FIG. 4 is a top view of an embodiment of the present invention.

[0020] Figure 7 This is a top view of the embodiment of the present invention after the cover plate is removed.

[0021] In the above drawings: 1. box body; 2. storage slot; 3. cover plate; 4. discharge pipe; 5. bracket; 6. mounting frame; 7. mounting shaft; 8. mounting column; 9. handle; 10. mounting cylinder; 11. mounting rod; 12. mounting block; 13. first mounting slot; 14. limit pin; 15. limit slot; 16. first spring; 17. pull rope; 18. pull ring; 19. hook; 20. closing plate; 21. support plate; 22. mounting seat; 23. limit block; 24. locking hole; 25. belt; 26. second mounting slot; 27. slide slot; 28. locking rod; 29. ​​second spring; 30. push rod; 31. rotating shaft; 32. stirring blade; 33. motor; 34. pulley. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1 As shown, an embodiment of the present invention proposes a device for preventing fine stone concrete from solidifying, comprising: a box body 1, a top of which is recessed to form a receiving groove 2 for receiving concrete, a side wall of the box body 1 is provided with a discharge pipe 4 for discharging the concrete in the receiving groove 2, and a bracket 5 is provided at the bottom of the box body 1; a cover plate 3, the cover plate 3 is rotatably arranged on the top of the box body 1 through an installation component, and the cover plate 3 is used to open and close the opening at the top of the receiving groove 2; a stirring component, which is rotatably arranged in the receiving groove 2; a driving component, the driving component is arranged at the bottom of the box body 1 through a mounting bracket 6, and the driving component is used to drive the stirring component to stir the concrete in the receiving groove 2; and an opening and closing component, which is arranged on the side wall of the bracket 5, and the opening and closing component is used to open and close the discharge pipe 4.

[0024] By opening a storage tank 2 at the top of the box body 1 to store concrete discharged from the concrete tank truck, and driving the stirring assembly through the driving assembly to stir the concrete in the storage tank 2, the concrete can be effectively prevented from initially setting and losing plasticity in the storage tank 2, thereby affecting the quality of the building. At the same time, the cost of the tank truck staying at the construction site for a long time to prevent the concrete from losing plasticity due to not being used up for a long time after being discharged from the tank truck is reduced. Further, a cover plate 3 is provided on the top of the box body 1 to effectively block sunlight from irradiating the concrete and prevent impurities from entering the storage tank 2. Specifically, in order to avoid the residual concrete from condensing in the storage tank 2 and damaging the device after multiple uses of the device, the device needs to be cleaned regularly after use. When cleaning, the cover plate 3 is operated to open the opening at the top of the storage tank 2.

[0025] like Figure 1 and Figure 6As shown, the mounting assembly includes a mounting shaft 7, a mounting column 8 and a hinge mechanism. The mounting column 8 is fixed to the side wall of the box body 1. The mounting shaft 7 is L-shaped. One end of the mounting shaft 7 is fixed to the top of the cover plate 3. The other end of the mounting shaft 7 is hinged to the top of the mounting column 8 through the hinge mechanism. A handle 9 is also provided on the top of one end of the mounting shaft 7 located on the cover plate 3. Figure 2 As shown, the articulated mechanism includes: a mounting cylinder 10, a mounting rod 11 and a mounting block 12, the mounting cylinder 10 is fixed on the top of the mounting column 8, the mounting cylinder 10 and the mounting shaft 7 are staggered, the mounting rod 11 is rotatably arranged on the mounting cylinder 10, the mounting rod 11 and the mounting cylinder 10 are coaxially arranged, the mounting shaft 7 is fixedly connected to the mounting rod 11, the mounting block 12 is fixedly arranged on the side wall of the mounting cylinder 10, and a locking member for locking or releasing the mounting rod 11 is arranged on the mounting block 12.

[0026] Specifically, when the cover plate 3 is needed to open the opening at the top of the storage tank 2 to add concrete into the storage tank 2 or clean the inside of the storage tank 2, the cover plate 3 is pushed from the handle 9 to rotate around the top of the box body 1. When the cover plate 3 is rotated to a vertical state, one end of the cover plate 3 is tightly attached to the top of the box body 1, and at this time, the locking piece on the mounting block 12 locks the mounting rod 11, so that the cover plate 3 remains in a vertical state, which is convenient for adding concrete into the storage tank 2 or cleaning the inside of the storage tank 2.

[0027] Further, such as Figure 3 as well as Figure 4 As shown, the locking member includes: a limit pin 14, a first spring 16 and a pull rope 17. The side wall recess of the mounting block 12 and the mounting tube 10 tightly adheres to form a first mounting groove 13. The limit pin 14 is slidably arranged in the first mounting groove 13. The first spring 16 is also arranged in the first mounting groove 13. The mounting rod 11 is provided with a limit groove 15 for inserting the limit pin 14. When the cover plate 3 is rotated to a vertical state, the limit pin 14 passes through the mounting tube 10 and is inserted into the limit groove 15 under the elastic force of the first spring 16. The limit pin 14 is slidably connected to the mounting tube 10. One end of the pull rope 17 is fixed to the end of the limit pin 14 away from the mounting rod 11, and the other end of the pull rope 17 passes through the mounting block 12. A pull ring 18 is fixedly arranged on the end of the pull rope 17 passing through the mounting block 12.

[0028] The working principle of the locking member is as follows: when the handle 9 pushes the cover plate 3 to rotate to a vertical state, the limiting groove 15 on the mounting rod 11 is aligned with the limiting pin 14, and the limiting pin 14 is inserted into the limiting groove 15 under the elastic force of the first spring 16, thereby fixing the mounting rod 11, thereby preventing the cover plate 3 from rotating relative to the box body 1, and keeping the cover plate 3 in a vertical state. Preferably, by arranging a hook 19 on the side wall of the mounting block 12, the pull ring 18 is hung on the hook 19, and when the pull ring 18 is hung on the hook 19, the pull rope 17 pulls the limiting pin 14 to a position away from the mounting rod 11, so that the limiting pin 14 does not block the mounting rod 11 from rotating relative to the mounting cylinder 10, and it is convenient to drive the cover plate 3 to rotate relative to the box body 1 through the handle 9 to open the storage slot 2.

[0029] like Figure 5 As shown, the opening and closing assembly includes: a closing plate 20, a mounting seat 22 and a limit block 23. A support plate 21 is arranged on the side wall of the bracket 5. The support plate 21 and the discharge pipe 4 are located on the same side of the box body 1. The mounting seat 22 is fixedly arranged on the top of the support plate 21. One end of the closing plate 20 vertically passes through the support plate 21 and the box body 1 from the bottom of the support plate 21 and is inserted into the discharge pipe 4. The closing plate 20 is used to close the discharge pipe 4. The closing plate 20 is slidably connected to the support plate 21 and the box body 1. The closing plate 20 is dynamically sealed with the discharge pipe 4. The limit block 23 is fixed to the side wall of the closing plate 20 by bolts. The limit block 23 is used to prevent the closing plate 20 from being separated from the discharge pipe 4. At least one locking hole 24 is arranged on the closing plate 20, and a clamping mechanism for cooperating with the locking hole 24 to lock the closing plate 20 is arranged on the mounting seat 22.

[0030] like Figure 5 As shown, the clamping mechanism includes: a locking rod 28, a second spring 29 and a push rod 30. The side wall of the mounting seat 22 is recessed near the closing plate 20 to form a second mounting groove 26. The top of the mounting seat 22 is provided with a slide groove 27 connected to the second mounting groove 26. The locking rod 28 is slidably arranged in the second mounting groove 26. The second spring 29 is also arranged in the second mounting groove 26. Under the elastic force of the second spring 29, the locking rod 28 is inserted into the locking hole 24. The push rod 30 is slidably arranged in the slide groove 27. One end of the push rod 30 is fixedly connected to the side wall of the locking rod 28.

[0031] Specifically, the working principle of the opening and closing assembly for opening and closing the discharge pipe 4 is as follows: first, when the discharge pipe 4 needs to be closed, the closing plate 20 is pushed vertically upward to insert the closing plate 20 into the discharge pipe 4, and the closing plate 20 is made to fit tightly against the inner wall of the discharge channel inside the discharge pipe 4, so that the closing plate 20 completely closes the discharge pipe 4. At this time, the locking rod 28 is just aligned with the locking hole 24 on the closing plate 20, and the second spring 29 bounces the locking rod 28 into the locking hole 24. The locking rod 28 prevents the closing plate 20 from moving relative to the discharge pipe 4, thereby keeping the discharge pipe 4 in a closed state. When the discharge pipe 4 needs to be opened, the push rod 30 is pushed to push the locking rod 28 out of the locking hole 24, and the closing plate 20 can be adjusted to move relative to the discharge pipe 4 to open the discharge pipe 4. Further, by setting a plurality of locking holes 24 on the closing plate 20, each locking hole 24 corresponds to a different opening size of the discharge pipe 4, thereby facilitating the staff to adjust the opening degree of the discharge pipe 4.

[0032] like Figure 1 and Figure 7 As shown, the stirring assembly includes: a stirring blade 32 and a rotating shaft 31 vertically and rotatably arranged at the bottom of the storage tank 2, one end of the rotating shaft 31 passes through the bottom of the box body 1, and the rotating shaft 31 is rotatably and sealedly connected to the box body 1. The driving assembly is used to drive the rotating shaft 31 to rotate. The stirring blade 32 is at least one piece, and the stirring blade 32 is evenly arranged on the side wall of the rotating shaft 31 by bolts.

[0033] like Figure 1 As shown, the driving assembly includes: a belt 25, a pulley 34 and a motor 33. The motor 33 is fixed on the mounting frame 6. There are two pulleys 34. The two pulleys 34 are respectively fixed to the output end of the motor 33 and one end of the rotating shaft 31 passing through the bottom of the box body 1. The belt 25 is sleeved on the two pulleys 34.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A device for preventing fine stone concrete from solidifying, characterized in that: include: The box body (1) has a top that is concave to form a receiving groove (2) for receiving concrete, a discharge pipe (4) for discharging concrete in the receiving groove (2) is provided on the side wall of the box body (1), and a bracket (5) is provided at the bottom of the box body (1); A cover plate (3), the cover plate (3) is rotatably arranged on the top of the box body (1) through a mounting assembly, and the cover plate (3) is used to open and close the opening at the top of the storage slot (2); A stirring assembly, which is rotatably disposed in the receiving tank (2); A driving assembly, the driving assembly being arranged at the bottom of the box body (1) via a mounting frame (6), and the driving assembly being used to drive the stirring assembly to stir the concrete in the receiving tank (2); as well as An opening and closing component, which is arranged on the side wall of the bracket (5), and is used to open and close the discharge pipe (4); The mounting assembly comprises a mounting shaft (7), a mounting column (8) and a hinge mechanism, wherein the mounting column (8) is fixed to the side wall of the box body (1), the mounting shaft (7) is L-shaped, one end of the mounting shaft (7) is fixed to the top of the cover plate (3), and the other end of the mounting shaft (7) is hinged to the top of the mounting column (8) through the hinge mechanism, and a handle (9) is also provided at the top of one end of the mounting shaft (7) located on the cover plate (3); The hinge mechanism comprises: a mounting cylinder (10), a mounting rod (11) and a mounting block (12); the mounting cylinder (10) is fixed on the top of the mounting column (8); the mounting cylinder (10) and the mounting shaft (7) are arranged alternately; the mounting rod (11) is rotatably arranged on the mounting cylinder (10); the mounting rod (11) and the mounting cylinder (10) are arranged coaxially; the mounting shaft (7) and the mounting rod (11) are fixedly connected; the mounting block (12) is fixedly arranged on the side wall of the mounting cylinder (10); and a locking member for locking or releasing the mounting rod (11) is arranged on the mounting block (12); The stirring assembly comprises: a stirring blade (32) and a rotating shaft (31) vertically and rotatably arranged at the bottom of the storage tank (2); one end of the rotating shaft (31) passes through the bottom of the box body (1); the rotating shaft (31) is rotatably and sealedly connected to the box body (1); the driving assembly is used to drive the rotating shaft (31) to rotate; the stirring blade (32) is at least one piece, and the stirring blade (32) is evenly arranged on the side wall of the rotating shaft (31) by bolts.

2. A device for preventing fine stone concrete from solidifying as claimed in claim 1, characterized in that: The locking member comprises: a limit pin (14), a first spring (16) and a pull rope (17); a first mounting groove (13) is formed by a side wall depression where the mounting block (12) and the mounting tube (10) are in close contact; the limit pin (14) is slidably arranged in the first mounting groove (13); the first spring (16) is also arranged in the first mounting groove (13); a limit groove (15) for inserting the limit pin (14) is arranged on the mounting rod (11); when the cover plate (3) is rotated, the limit pin (14) is locked; When the device reaches a vertical state, the limit pin (14) passes through the mounting tube (10) and is inserted into the limit groove (15) under the elastic force of the first spring (16). The limit pin (14) is slidably connected to the mounting tube (10). One end of the pull rope (17) is fixed to the end of the limit pin (14) away from the mounting rod (11), and the other end of the pull rope (17) passes through the mounting block (12). A pull ring (18) is fixedly provided on the end of the pull rope (17) passing through the mounting block (12).

3. A device for preventing fine stone concrete from solidifying as claimed in claim 2, characterized in that: A hook (19) for hanging the pull ring (18) is also provided on the side wall of the mounting block (12).

4. A device for preventing fine stone concrete from solidifying as claimed in any one of claims 1 to 3, characterized in that: The opening and closing assembly comprises: a closing plate (20), a mounting seat (22) and a limit block (23); a support plate (21) is arranged on the side wall of the bracket (5); the support plate (21) and the discharge pipe (4) are located on the same side of the box body (1); the mounting seat (22) is fixedly arranged on the top of the support plate (21); one end of the closing plate (20) vertically passes through the support plate (21) and the box body (1) from the bottom of the support plate (21) and is inserted into the discharge pipe (4); the closing plate (20) is used to close the discharge pipe (4). The material pipe (4), the closing plate (20) and the supporting plate (21) and the box body (1) are all slidably connected, the closing plate (20) and the discharge pipe (4) are dynamically sealed, the limit block (23) is fixed to the side wall of the closing plate (20) by bolts, the limit block (23) is used to prevent the closing plate (20) from being separated from the discharge pipe (4), at least one locking hole (24) is provided on the closing plate (20), and the mounting seat (22) is provided with a clamping mechanism for cooperating with the locking hole (24) to lock the closing plate (20).

5. A device for preventing fine stone concrete from solidifying as claimed in claim 4, characterized in that: The clamping mechanism comprises: a locking rod (28), a second spring (29) and a push rod (30); the side wall of the mounting seat (22) is recessed near the closing plate (20) to form a second mounting groove (26); the top of the mounting seat (22) is provided with a slide groove (27) connected to the second mounting groove (26); the locking rod (28) is slidably arranged in the second mounting groove (26); the second spring (29) is also arranged in the second mounting groove (26); under the elastic force of the second spring (29), the locking rod (28) is inserted into the locking hole (24); the push rod (30) is slidably arranged in the slide groove (27); one end of the push rod (30) is fixedly connected to the side wall of the locking rod (28).

6. A device for preventing fine stone concrete from solidifying as claimed in claim 1, characterized in that: The driving assembly comprises: a belt (25), a pulley (34) and a motor (33); the motor (33) is fixed on a mounting frame (6); there are two pulleys (34); the two pulleys (34) are respectively fixed on an output end of the motor (33) and one end of a rotating shaft (31) passing through the bottom of the box body (1); and the belt (25) is sleeved on the two pulleys (34).

Citation Information

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