Concrete mixing and conveying equipment

Abstract

The invention belongs to the technical field of building machinery, and particularly relates to concrete mixing and conveying equipment which comprises a supporting platform, concrete mixing equipment is fixedly connected to the upper portion of the supporting platform through a connecting rod, a concrete output pipe is arranged at the bottom of the concrete mixing equipment, and the concrete output pipe is connected with a spiral conveyor. The spiral conveyor is fixed to the top of the supporting platform. The spiral conveyor is provided with a concrete input quantity control mechanism and a pressure relief conveying mechanism, the concrete quantity input into the spiral conveyor in unit time is controlled through the concrete quantity control mechanism, the pressure of the concrete in the spiral conveyor is adjusted through the pressure relief conveying mechanism, and redundant concrete is output.

Description

Technical Field

[0001] The invention belongs to the technical field of construction machinery, and in particular relates to concrete mixing and conveying equipment. Background Art

[0002] Concrete mixing and conveying equipment is a commonly used equipment in construction projects. It generally includes concrete mixing equipment and a screw conveyor connected to it. The screw conveyor conveys concrete through the spiral blades on the main shaft driven by the motor. In actual use, there is a risk of blockage. The main reasons are: 1. The amount of concrete input into the screw conveyor is not standardized. When the input speed is too fast, a large amount of concrete cannot be transported in time, resulting in blockage; 2. As time accumulates, the amount of concrete in the screw conveyor increases, the pressure increases, and blockage gradually occurs. The screw conveyor lacks a pressure relief mechanism and cannot adjust the pressure inside it. Summary of the invention

[0003] In view of the problems described in prior arts 1 and 2, the present invention discloses a concrete mixing and conveying equipment.

[0004] To achieve the above purpose, the technical solution of the present invention is:

[0005] A concrete mixing and conveying device comprises a supporting platform, wherein a concrete mixing device is fixedly connected to the top of the supporting platform via a connecting rod, a concrete output pipe is arranged at the bottom of the concrete mixing device, the concrete output pipe is connected to a screw conveyor, and the screw conveyor is fixed to the top of the supporting platform; the screw conveyor is provided with a concrete input quantity control mechanism and a pressure relief conveying mechanism, the concrete quantity input into the screw conveyor per unit time is controlled by the concrete quantity control mechanism, and the concrete pressure in the screw conveyor is adjusted by the pressure relief conveying mechanism to output the excess concrete.

[0006] Preferably, the screw conveyor comprises an outer shell, an inner tube coaxially fixedly connected to the outer shell, one end of the upper outer wall of the inner tube and one end of the upper outer wall of the outer shell are respectively provided with a first input port and a second input port opposite to each other, the bottom end of the concrete output pipe is connected to the second input port and is opposite to the first input port, the two ends of the inner tube are respectively fixedly connected to the two ends of the outer shell, a main shaft is coaxially connected to the inside of the inner tube, a first spiral blade is provided on the outer wall of the main shaft, a first output port is provided at one end of the lower part of the inner tube away from the first input port, a second output port is provided at the lower end of the outer shell opposite to the first output port, and the first output port and the second output port are both located on the outside of the support platform.

[0007] Preferably, an outer tube is coaxially sleeved outside the inner tube, the outer wall of the outer tube is rotatably connected to the inner wall of the outer shell via a bearing, a driven gear is coaxially fixedly connected to the outer wall of the outer tube, a rotating motor is fixedly provided on the top of the outer shell, the output shaft of the rotating motor is fixedly connected to a driving gear, the lower part of the driving gear passes through a preset through hole on the outer shell and is meshed with the driven gear, and the outer tube is driven to rotate at a set speed by the rotating motor.

[0008] Preferably, the concrete quantity control mechanism comprises a first annular piston and a second annular piston coaxially arranged on the outer wall surface and the inner wall surface of one end of the outer tube, the first annular piston and the second annular piston are arranged opposite to each other inside and outside, the first annular piston is sealingly and slidingly connected to the inner wall of the outer shell and used to close the second input port, the second annular piston is sealingly and slidingly connected to the outer wall of the inner tube and used to close the first input port, and a third input port is provided between the first annular piston and the second annular piston, when the first input port, the second input port and the third input port are opposite to each other, concrete enters the inner tube, and the concrete input speed is controlled through the third input port.

[0009] Preferably, the control of the concrete input speed refers to: obtaining the optimal speed of concrete delivery by the screw conveyor according to experimental data, and matching the speed of concrete input into the inner tube with the optimal speed by controlling the rotation speed of the rotating motor.

[0010] Preferably, the pressure relief and conveying mechanism includes a second spiral blade arranged on the inner surface of the outer tube, and a plurality of pressure relief holes are evenly distributed on the tube wall of the inner tube away from the first input port, the inner diameter of the pressure relief holes is larger than the outer diameter of the concrete aggregate, and the second spiral blade is used to convey the concrete gushing out of the pressure relief holes to the end of the outer tube, and the end of the outer tube is aligned with the inner edge of the second output port.

[0011] Preferably, a driving motor is provided at one end of the main shaft away from the first output port, and the output shaft of the driving motor passes through the ends of the outer shell and the inner tube and is fixedly connected to the main shaft.

[0012] The beneficial effects of the concrete mixing and conveying equipment of the present invention are:

[0013] The present invention controls the amount of concrete input into the screw conveyor per unit time through a concrete amount control mechanism to avoid blockage caused by excessive input amount, and adjusts the concrete pressure in the screw conveyor through a pressure relief conveying mechanism to output excess concrete to avoid blockage caused by high internal pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view structural schematic diagram of the present invention as a whole.

[0015] Figure 2It is a partial cross-sectional structural schematic diagram of the present invention.

[0016] Figure 3 It is a front view structural schematic diagram of the outer tube of the present invention.

[0017] Figure 4 It is a front view structural schematic diagram of the inner tube of the present invention.

[0018] The figure shows: 1-concrete mixing equipment, 101-concrete output pipe, 102-valve, 2-screw conveyor, 201-driving motor, 202-inner pipe, 203-outer pipe, 204-main shaft, 205-first spiral blade, 206-outer shell, 207-second input port, 208-first input port, 209-rotating motor, 210-driving gear, 211-second output port, 212-first output port, 213-pressure relief hole, 2031-first annular piston, 2032-second annular piston, 2033-third input port, 2034-bearing, 2035-second spiral blade, 2036-driven gear, 3-support platform. DETAILED DESCRIPTION

[0019] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0020] The following embodiments may be understood as individually expressing a part of a local structure or method of the present invention, or may be understood as a combination of the embodiments to explain the connotation of a larger structure or method of the present invention.

[0021] A concrete mixing and conveying equipment, such as Figure 1-4 As shown, it includes a support platform 3, and a concrete mixing device 1 is fixedly connected to the top of the support platform 3 through a connecting rod (not shown in the figure). A concrete output pipe 101 is provided at the bottom of the concrete mixing device 1, and the concrete output pipe 101 is connected to a screw conveyor 2, and the screw conveyor 2 is fixed on the top of the support platform 3; the screw conveyor 2 is provided with a concrete input amount control mechanism and a pressure relief conveying mechanism, and the concrete amount control mechanism controls the amount of concrete input into the screw conveyor per unit time to avoid blockage caused by excessive input amount, and the pressure relief conveying mechanism adjusts the concrete pressure in the screw conveyor and outputs excess concrete to avoid blockage caused by high internal pressure.

[0022] Further, such as Figure 1-4As shown, the screw conveyor 2 includes an outer shell 206, an inner tube 202 coaxially fixedly connected to the outer shell 206, one end of the upper outer wall of the inner tube 202 and one end of the upper outer wall of the outer shell 206 are respectively provided with a first input port 208 and a second input port 207 opposite to each other, the bottom end of the concrete output pipe 101 is connected to the second input port 207 and is opposite to the first input port 208, the two ends of the inner tube 202 are respectively fixedly connected to the two ends of the outer shell 206, the inner tube 202 is coaxially rotatably connected with a main shaft 204, the outer wall of the main shaft 204 is provided with a first spiral blade 205, the lower end of the inner tube 202 away from the first input port is provided with a first output port 212, the lower end of the outer shell 206 opposite to the first output port 212 is provided with a second output port 211, and the first output port 212 and the second output port 211 are both located on the outside of the support platform 3.

[0023] Further, such as Figure 1-4 As shown, an outer tube 203 is coaxially sleeved outside the inner tube 202, and the outer wall of the outer tube 203 is rotatably connected to the inner wall of the outer shell 206 through a bearing 2034. A driven gear 2036 is also coaxially fixedly connected to the outer wall of the outer tube 203. A rotating motor 209 is fixedly provided on the top of the outer shell 206, and a driving gear 210 is fixedly connected to the output shaft of the rotating motor 209. The lower part of the driving gear 210 passes through a preset through hole on the outer shell 206 and is meshed with the driven gear 2036. The outer tube 203 is driven to rotate at a set speed through the rotating motor 209.

[0024] Further, such as Figure 1-4 As shown, the concrete quantity control mechanism includes a first annular piston 2031 and a second annular piston 2032 coaxially arranged on the outer wall surface and the inner wall surface of one end of the outer tube 203, the first annular piston 2031 and the second annular piston 2032 are arranged opposite to each other inside and outside, the first annular piston 2031 is sealingly slidably connected to the inner wall of the outer shell 206 and used to close the second input port 207, the second annular piston 2032 is sealingly slidably connected to the outer wall of the inner tube 202 and used to close the first input port 208, and a third input port 2033 is provided between the first annular piston 2031 and the second annular piston 2032. When the first input port 2031, the second input port 2032 and the third input port 2033 are opposite to each other, concrete enters the inner tube 202, and the concrete input speed is controlled through the third input port 2033.

[0025] Further, such as Figure 1-4 As shown, the control of the concrete input speed refers to: obtaining the optimal speed of the screw conveyor for concrete delivery according to experimental data, and matching the speed of the concrete input into the inner tube 202 with the optimal speed by controlling the rotation speed of the rotating motor 209 .

[0026] Further, such as Figure 1-4 As shown, the pressure relief conveying mechanism includes a second spiral blade 2035 arranged on the inner surface of the outer tube 203, and a plurality of pressure relief holes 213 are evenly distributed on the tube wall of the inner tube 202 away from the first input port 208. The inner diameter of the pressure relief hole 213 is larger than the outer diameter of the concrete aggregate. The second spiral blade 2035 is used to convey the concrete flowing out of the pressure relief hole to the end of the outer tube 203, and the end of the outer tube 203 is aligned with the inner edge of the second output port 211. The number of pressure relief holes is set according to needs to avoid a large amount of concrete leakage when the pressure in the inner tube is not large (lower than the critical pressure when blocked), and at the same time, it is also necessary to ensure that the pressure relief effect is achieved when the pressure in the inner tube is large. This design can obtain relevant data based on experiments.

[0027] Further, such as Figure 1 As shown, a driving motor 201 is disposed at one end of the main shaft 204 away from the first output port 212 , and an output shaft of the driving motor 201 passes through the outer shell 206 and the end of the inner tube 202 and is fixedly connected to the main shaft 204 .

[0028] The working mechanism of the present invention is as follows: the amount of concrete input into the screw conveyor per unit time is controlled by a concrete amount control mechanism to avoid blockage caused by excessive input amount; the concrete pressure in the screw conveyor is adjusted by a pressure relief conveying mechanism to output excess concrete to avoid blockage caused by high internal pressure.

Claims

1. A concrete mixing and conveying equipment, characterized by: It comprises a supporting platform, a concrete mixing device is fixedly connected to the top of the supporting platform through a connecting rod, a concrete output pipe is arranged at the bottom of the concrete mixing device, the concrete output pipe is connected to a screw conveyor, and the screw conveyor is fixed on the top of the supporting platform; the screw conveyor is provided with a concrete input quantity control mechanism and a pressure relief conveying mechanism, the concrete quantity input into the screw conveyor per unit time is controlled by the concrete quantity control mechanism, the concrete pressure in the screw conveyor is adjusted by the pressure relief conveying mechanism and the excess concrete is output.

2. A concrete mixing and conveying equipment as claimed in claim 1, characterized in that: The screw conveyor comprises an outer shell, an inner tube coaxially fixedly connected to the outer shell, one end of the upper outer wall of the inner tube and one end of the upper outer wall of the outer shell are respectively provided with a first input port and a second input port opposite to each other, the bottom end of the concrete output pipe is connected to the second input port and is opposite to the first input port, the two ends of the inner tube are respectively fixedly connected to the two ends of the outer shell, a main shaft is coaxially connected to the inner tube, a first spiral blade is provided on the outer wall of the main shaft, a first output port is provided at one end of the lower part of the inner tube away from the first input port, a second output port is provided at the lower end of the outer shell opposite to the first output port, and the first output port and the second output port are both located on the outside of the supporting platform.

3. A concrete mixing and conveying equipment as claimed in claim 2, characterized in that: An outer tube is coaxially sleeved outside the inner tube, the outer wall of the outer tube is rotatably connected to the inner wall of the outer shell via a bearing, a driven gear is coaxially fixedly connected to the outer wall of the outer tube, a rotating motor is fixedly provided on the top of the outer shell, the output shaft of the rotating motor is fixedly connected to a driving gear, the lower part of the driving gear passes through a preset through hole on the outer shell and is meshed with the driven gear, and the outer tube is driven to rotate at a set speed by the rotating motor.

4. A concrete mixing and conveying equipment as claimed in claim 3, characterized in that: The concrete quantity control mechanism comprises a first annular piston and a second annular piston coaxially arranged on the outer wall surface and the inner wall surface of one end of the outer tube, the first annular piston and the second annular piston are arranged opposite to each other inside and outside, the first annular piston is sealingly and slidably connected to the inner wall of the outer shell and used to close the second input port, the second annular piston is sealingly and slidably connected to the outer wall of the inner tube and used to close the first input port, and a third input port is provided between the first annular piston and the second annular piston. When the first input port, the second input port and the third input port are opposite to each other, concrete enters the inner tube, and the control of the concrete input speed is realized through the third input port.

5. A concrete mixing and conveying equipment as claimed in claim 4, characterized in that: The control of the concrete input speed refers to: obtaining the optimal speed of the screw conveyor for concrete delivery according to experimental data, and matching the speed of the concrete input into the inner tube with the optimal speed by controlling the rotation speed of the rotating motor.

6. A concrete mixing and conveying equipment as claimed in claim 5, characterized in that: The pressure relief and conveying mechanism includes a second spiral blade arranged on the inner surface of the outer tube, and a plurality of pressure relief holes are evenly distributed on the tube wall of the inner tube away from the first input port. The inner diameter of the pressure relief holes is larger than the outer diameter of the concrete aggregate. The second spiral blade is used to convey the concrete gushing out of the pressure relief holes to the end of the outer tube, and the end of the outer tube is aligned with the inner edge of the second output port.

7. A concrete mixing and conveying equipment as claimed in claim 6, characterized in that: A driving motor is arranged at one end of the main shaft away from the first output port, and the output shaft of the driving motor passes through the ends of the outer shell and the inner tube and is fixedly connected to the main shaft.

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