Hydraulic engineering concrete conveying equipment based on hydroelectric power station construction

Abstract

The invention discloses hydraulic engineering concrete conveying equipment based on hydroelectric power plant construction, and relates to the technical field of concrete transportation, the hydraulic engineering concrete conveying equipment comprises a body arranged in an inclined tubular shape, and the body is arranged in a coaxial double-barrel shape; the spiral conveying blade is coaxially and rotatably arranged in the body so as to convey the concrete from the low end to the high end; the anti-segregation units are arranged in the direction of the central axis of the body at equal intervals, and each anti-segregation unit comprises an elastic piece which is in an arc-shaped plate shape and is evenly distributed on the inner wall of the body in the circumferential direction. According to the invention, through the arrangement of the elastic piece and the grading gas circuit unit, a composite force field of axial propulsion and radial extrusion is formed through the spiral blade to forcibly mix and compact aggregate and cement paste again on concrete at a corresponding position, so that the influence on the quality of the concrete due to separation of the aggregate and cement is effectively avoided, and the transportation effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete transportation, and specifically to a concrete conveying device for a water conservancy project based on the construction of a hydropower station. Background Technique

[0002] In water conservancy projects, the construction of a hydropower station is an important technical project. During the construction of a hydropower station, concrete pouring is required for the construction of the foundation, and during the construction process, concrete needs to be transported from a low place to a high place for pouring.

[0003] During the process of conveying concrete from a low place to a high place, it is generally conveyed through an inclined conveying pipe. By driving the rotation of the blades provided by the screw, the concrete entering the conveying pipe is transported from a low place to a high place under the pushing action of the blades. However, during the conveying process, since cement has a certain fluidity, when the blades convey the concrete, part of the cement will flow back, resulting in the separation of the aggregate and cement of the concrete. Summary of the Invention

[0004] Aiming at the deficiencies existing in the prior art, the present invention provides a concrete conveying device for a water conservancy project based on the construction of a hydropower station.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] A concrete conveying device for a water conservancy project based on the construction of a hydropower station, comprising:

[0007] A body arranged in an inclined tubular shape, and the body is arranged in a coaxial double-tube shape;

[0008] A spiral conveying blade, which is coaxially rotatably arranged in the body to transport concrete from the low end to the high end;

[0009] An anti-segregation unit, which is equidistantly arranged along the central axis direction of the body, and the anti-segregation unit comprises:

[0010] An elastic member, which is circumferentially and evenly distributed on the inner wall of the body in the shape of an arc-shaped plate;

[0011] A grading air path unit, which is circumferentially and evenly distributed in the annular gap between the double tubes of the body, and the grading air path unit comprises:

[0012] Radial sealing pipes, which are equidistantly arranged along the central axis direction of the body, and are communicated between adjacent radial sealing pipes;

[0013] A pressure relief plate, which is elastically arranged in the radial sealing pipe and is in transmission connection with the top of the arc of the elastic member;

[0014] Among them, the air flow is injected from the first-stage radial seal pipe at the high end, and the first-stage discharge pressure plate is pushed to be compressed to the limit and the air outlet is exposed to the air flow. The air flow enters the secondary radial seal pipe and is sequentially transmitted to the low end;

[0015] The discharge pressure plate synchronously pushes the elastic member to protrude radially inward, and forms a combined force field of axial propulsion and radial extrusion with the spiral blade to inhibit the segregation of aggregate and cement.

[0016] Preferably, a rotating shaft is rotatably arranged in the main body, the spiral conveying blade is fixedly connected to the rotating shaft, a diversion channel communicated with the classification air path unit is arranged in the rotating shaft, and the cross-sectional area of the diversion channel gradually decreases from the low-end air inlet to the high-end air outlet.

[0017] Preferably, negative pressure cavities are equidistantly arranged on the diversion channel.

[0018] Preferably, annular cavities are equidistantly arranged in the rotating shaft, the diversion channel is located in the inner ring of the annular cavity, and the two are coaxially arranged. The annular cavity is communicated with the negative pressure cavity.

[0019] Preferably, the annular cavity divides the rotating shaft into multiple segments, and the spiral conveying blades on the corresponding segment surfaces are hollow spiral blades and are communicated with the annular cavity.

[0020] Preferably, a plurality of negative pressure holes are arranged on the axial propulsion surface of the spiral conveying blade.

[0021] Preferably, a hydrophobic film is arranged on the negative pressure hole.

[0022] Preferably, an air inlet section is arranged on the rotating shaft, the air inlet section is a mesh pipe, and the air inlet section is communicated with the air inlet port of the diversion channel.

[0023] Preferably, the interior of the main body includes a cavity and a conveying cavity at the low end. A diversion member is arranged inside the cavity, and it is located at the air inlet section of the rotating shaft. The diversion member is funnel-shaped, and the cross-sectional area gradually decreases from the air inlet to the air outlet. One side wall of the cavity is mesh-shaped.

[0024] Preferably, centrifugal blades are axially distributed on the low-end surface of the rotating shaft, and the centrifugal blades are located at the air inlet of the diversion member.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] Through the provided elastic member and hierarchical gas path unit, air is introduced into the hierarchical gas path unit. The air enters the high-position first-stage radial seal pipe. The air inlet of the radial seal pipe is opened at a position on the inner cylinder far from the main body, while the air outlet is opened at a position close to the inner cylinder. And the initial position of the pressure relief plate is located between the air inlet and the air outlet of the radial seal pipe. When the air enters the radial seal pipe, as the air pressure inside the cavity of the radial seal pipe on the side close to the air inlet of the pressure relief plate continuously increases, the pressure relief plate is thus pushed to move along the central axis direction of the radial seal pipe towards the direction close to the inner cylinder, and the spring is compressed. Then, the elastic member is pushed by the push rod arranged between the pressure relief plate and the elastic member to deform, so that the elastic member bulges radially inwards, thereby radially extruding the concrete at the corresponding position. Thus, a composite force field of axial propulsion and radial extrusion is formed through the spiral blades to remix and compact the aggregate and cement slurry of the concrete at the corresponding position, effectively preventing the separation of the aggregate and cement from affecting the quality of the concrete, and thereby improving the transportation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The disclosure of the present invention will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0028] Figure 1 is a perspective view of the present invention;

[0029] Figure 2 is a front cross-sectional structural schematic diagram of the present invention;

[0030] Figure 3 is of the present invention Figure 2 magnified schematic diagram at A;

[0031] Figure 4 is of the present invention Figure 3 magnified schematic diagram at B;

[0032] Figure 5 is of the present invention Figure 3 schematic diagram of the change at B;

[0033] Figure 6 is of the present invention Figure 3 magnified schematic diagram at C;

[0034] Figure 7 is a transverse cross-sectional structural schematic diagram of the present invention;

[0035] Figure 8 is a transverse cross-sectional change structural schematic diagram of the present invention.

[0036] Explanations in the figure: 1. Main body; 2. Guide member; 3. Rotating shaft; 31. Air intake section; 4. Centrifugal blades; 5. Inner cylinder; 6. Spiral conveying blades; 61. Negative pressure hole; 7. Guide channel; 71. Negative pressure chamber; 8. Pressure chamber; 9. Elastic member; 10. Radial sealing tube; 11. Pressure relief plate; 12. Push rod; 13. Annular chamber. DETAILED DESCRIPTION

[0037] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0038] like Figure 1-8 As shown, a hydraulic engineering concrete conveying equipment based on the construction of a hydroelectric power station comprises:

[0039] The main body 1 is arranged in an inclined tubular shape, and the main body 1 is arranged in a coaxial double-cylinder shape;

[0040] The spiral conveying blade 6 is coaxially rotatably arranged in the body 1 to transport the concrete from the lower end to the higher end;

[0041] The anti-segregation unit is equidistantly arranged along the central axis of the body 1, and the anti-segregation unit includes:

[0042] The elastic member 9 is in the shape of an arc plate and is evenly distributed on the inner wall of the body 1 in the circumferential direction;

[0043] The graded gas path unit is evenly distributed in the annular gap between the double cylinders of the body 1 in the circumferential direction. The graded gas path unit includes:

[0044] The radial sealing tubes 10 are arranged equidistantly along the central axis of the body 1, and adjacent radial sealing tubes 10 are connected to each other;

[0045] The pressure relief plate 11 is elastically arranged in the radial sealing tube 10 and is drivingly connected to the top of the arc of the elastic member 9;

[0046] The airflow is injected from the first radial sealing tube 10 at the high end, and pushes the first pressure relief plate 11 to be compressed to the limit and the air outlet is exposed to the airflow, and the airflow enters the secondary radial sealing tube 10 and is transmitted to the low end in turn;

[0047] The pressure relief plate 11 simultaneously pushes the elastic member 9 to protrude radially inward, and forms a composite force field of axial propulsion and radial extrusion with the spiral conveying blade 6 to inhibit the segregation of aggregate and cement.

[0048] Specifically, during the process of transporting concrete from a lower place to a higher place, it is generally transported through an inclined conveying pipe. By driving the rotation of the blades provided by the driving screw, the concrete entering the conveying pipe is transported from a lower place to a higher place under the propulsion of the blades. However, during the transportation process, due to the certain fluidity of the cement, when the blades convey the concrete, part of the cement will flow back, resulting in the separation of the aggregate and cement of the concrete. Through the anti-segregation unit provided, when transporting the concrete, the concrete is introduced into the main body 1 through the feeding port provided on the low-end cylinder wall of the main body 1. The motor provided on the low-end surface of the main body 1 drives the spiral conveying blade 6 to rotate. The axial thrust of the spiral conveying blade 6 transports the concrete from the low end to the high end, and it is discharged to the designated position through the discharge port provided on the high-end cylinder wall of the main body 1.

[0049] Furthermore, during the transportation process, air flow is introduced into the grading air path unit. The air flow enters the high-end first-stage radial sealing pipe 10. As Figure 3 shown, the air inlet of the radial sealing pipe 10 is opened at a position far from the inner cylinder 5 of the main body 1, and the air outlet is opened at a position close to the inner cylinder 5. And the initial position of the pressure relief plate 11 is located between the air inlet and the air outlet of the radial sealing pipe 10. When the air flow enters the radial sealing pipe 10, as the air pressure inside the cavity of the radial sealing pipe 10 on the side close to the air inlet of the pressure relief plate 11 continuously increases, it pushes the pressure relief plate 11 to move along the central axis direction of the radial sealing pipe 10 towards the direction close to the inner cylinder 5, and compresses the spring. Thus, the push rod 12 provided between the pressure relief plate 11 and the elastic member 9 pushes the elastic member 9 to deform as Figures 4 to 5 shown, so that the elastic member 9 bulges radially inward, thereby generating a radial extrusion on the concrete at the corresponding position as Figures 7 to 8 shown. Thus, a composite force field of axial propulsion and radial extrusion is formed through the spiral conveying blade 6 to forcibly remix and compact the aggregate and cement paste of the concrete at the corresponding position, effectively avoiding the separation of the aggregate and cement from affecting the quality of the concrete, thereby improving the transportation effect.

[0050] Further, when the pressure relief plate 11 compresses the spring to the limit state, the pressure relief plate 11 crosses the air outlet, so that the air outlet communicates with the cavity of the radial seal pipe 10 on the side of the pressure relief plate 11 close to the air inlet. Thus, the air flow enters the secondary radial seal pipe 10 and is sequentially transmitted to the low end, which is consistent with the direction of the concrete gravity and is transmitted in the reverse direction along the conveying direction. The anti-segregation unit radially extrudes the concrete at the corresponding positions from the high end to the low end in turn, effectively improving the energy utilization rate. When the air flow enters the last radial seal pipe 10, the air flow is stopped. Under the action of the spring, the pressure relief plate 11 drives the elastic member 9 to restore its deformation. Then, the air flow is introduced into the grading air path unit again. By intermittently introducing the air flow into the grading air path unit, the periodic dynamic deformation of the elastic member 9 is realized, so as to dynamically extrude the concrete entering the main body 1, effectively reducing the segregation rate of the concrete and improving the transportation effect.

[0051] It should be noted that the elastic member 9 is connected to the inner wall of the inner cylinder 5 through a rubber ring to provide deformation space for the elastic member 9. The air flow introduced into the grading air path unit can be pumped in by an air pump, or introduced through a fan duct, or any technical means well-known to those skilled in the art can be used.

[0052] A rotating shaft 3 is arranged inside the main body 1 in a rotating manner. The spiral conveying blade 6 is fixedly connected to the rotating shaft 3. A diversion channel 7 communicating with the grading air path unit is arranged inside the rotating shaft 3. The cross-sectional area of the diversion channel 7 gradually decreases from the low-end air inlet to the high-end air outlet.

[0053] Specifically, since the cross-sectional area of the diversion channel 7 gradually decreases from the low-end air inlet to the high-end air outlet, following the principle that the flow velocity is small at the large cross-section and large at the small cross-section, the air flow first enters the diversion channel 7 to accelerate and then enters the grading air path unit, thereby shortening the time for the pressure relief plate 11 to compress the spring to the limit state, further shortening the period of the dynamic deformation of the elastic member 9, and being able to radially extrude the concrete entering the main body 1 in time, effectively reducing the segregation rate of the concrete during transportation.

[0054] Negative pressure cavities 71 are arranged at equal intervals on the diversion channel 7.

[0055] Specifically, through the negative pressure cavities 71 arranged at equal intervals on the diversion channel 7, the diversion channel 7 is divided into multiple acceleration sections, so as to realize the step-by-step acceleration of the air flow. Following the principle that when a high-speed fluid passes through a nozzle, due to the increase in the flow velocity, the pressure decreases, thus forming a negative pressure near the nozzle, and this negative pressure can suck in the surrounding fluid, after the air flow is accelerated through the diversion channel 7, a negative pressure is generated at the end of each acceleration section, so that a negative pressure is generated in the negative pressure cavity 71, and the negative pressure generated in the negative pressure cavity 71 gradually increases from the air inlet to the air outlet direction along with the increase in the air flow velocity.

[0056] The rotating shaft 3 is equidistantly provided with annular cavities 13 inside. The diversion channel 7 is located inside the inner ring of the annular cavity 13, and the two are coaxially arranged. The annular cavity 13 is communicated with the negative pressure cavity 71.

[0057] Specifically, through the negative pressure cavities 71 equidistantly arranged on the diversion channel 7, the diversion channel 7 is divided into multiple acceleration sections, so as to realize the step-by-step acceleration of the air flow. Following the principle that when high-speed fluid passes through a nozzle, due to the increase in flow velocity, the pressure decreases, thus forming a negative pressure near the nozzle, and this negative pressure can suck in the surrounding fluid. After the air flow is accelerated through the diversion channel 7, a negative pressure is generated at the end of each acceleration section, so as to generate a negative pressure in the negative pressure cavity 71, thereby sucking the inside of the annular cavity 13, so as to form a negative pressure in the annular cavity 13.

[0058] The annular cavity 13 divides the rotating shaft 3 into multiple sections, and the spiral conveying blades 6 on the corresponding section surfaces are hollow spiral blades and are communicated with the annular cavity 13.

[0059] Specifically, since the spiral conveying blades 6 are hollow spiral blades and are communicated with the annular cavity 13, when the air flow is accelerated through the diversion channel 7, a negative pressure is generated at the end of each acceleration section, so as to generate a negative pressure in the negative pressure cavity 71, thereby sucking the inside of the annular cavity 13, so as to form a negative pressure in the annular cavity 13, and further sucking the inside of the spiral conveying blades 6, so that the spiral conveying blades 6 generate a negative pressure.

[0060] A plurality of negative pressure holes 61 are opened on the axial propulsion surface of the spiral conveying blade 6.

[0061] Specifically, when the air flow is accelerated through the diversion channel 7, a negative pressure is generated at the end of each acceleration section, so as to generate a negative pressure in the negative pressure cavity 71, thereby sucking the inside of the annular cavity 13, so as to form a negative pressure in the annular cavity 13, and further sucking the inside of the spiral conveying blades 6, so that the spiral conveying blades 6 generate a negative pressure, and through the negative pressure holes 61, adsorb the concrete on the axial propulsion surface of the corresponding section of the spiral conveying blade 6, so as to further avoid the separation of aggregate and sediment and further reduce the segregation rate of the concrete during transportation.

[0062] Furthermore, as the airflow is accelerated through the diversion channel 7, a negative pressure is generated at the end of each acceleration section, resulting in a negative pressure in the negative pressure chamber 71. The negative pressure generated in the negative pressure chamber 71 gradually increases from the air inlet to the air outlet direction as the airflow velocity increases. Also, as the position of the concrete continuously rises, the probability of concrete segregation increases with the height. By making the negative pressure generated in the negative pressure chamber 71 gradually increase from the air inlet to the air outlet direction as the airflow velocity increases, the adsorption force of the spiral conveying blade 6 on the concrete on the axial advancing surface from the low end to the high end gradually increases, thereby realizing the adaptive adjustment of the adsorption force of the negative pressure holes 61 at the corresponding positions according to the height, further improving the adsorption effect on the concrete, and effectively reducing the segregation rate of the concrete.

[0063] A hydrophobic film is provided on the negative pressure hole 61.

[0064] Specifically, as the elastic member 9 undergoes periodic dynamic deformation to radially extrude the concrete periodically, the air inside the concrete is discharged, making the aggregate and sediment combine more tightly. Through the cooperation of the provided hydrophobic film and the elastic member 9, the elastic member 9 discharges air bubbles during periodic deformation, and the negative pressure hole 61 sucks the air bubbles, thereby further realizing the elimination of air bubbles, making the aggregate and sediment combine more tightly, and further reducing the segregation rate of the concrete.

[0065] An air inlet section 31 is provided on the rotating shaft 3. The air inlet section 31 is a mesh pipeline and is connected to the air inlet port of the diversion channel 7.

[0066] The interior of the main body 1 includes a cavity and a conveying cavity at the low end. A diversion member 2 is provided inside the cavity, which is located at the air inlet section 31 of the rotating shaft 3. The diversion member 2 is funnel-shaped, and the cross-sectional area gradually decreases from the air inlet to the air outlet. One side wall of the cavity is mesh-shaped.

[0067] Centrifugal blades 4 are axially distributed on the low-end surface of the rotating shaft 3. The centrifugal blades 4 are located at the air inlet of the diversion member 2.

[0068] Specifically, the motor drives the rotating shaft 3 to rotate, thereby driving the centrifugal blades 4 to rotate. Thus, through the mesh-shaped one side wall of the cavity at the low end of the main body 1, the air flow is introduced into the diversion member 2. After being accelerated by the diversion of the diversion member 2, it further enters the diversion channel 7 through the air inlet section 31, then enters the pressure chamber 8 through the diversion channel 7, and finally is split into the classification air path unit. By the intermittent start of the motor, the air flow is periodically introduced, eliminating the need for an additional air source, further simplifying the structure and saving the manufacturing cost.

[0069] The technical scope of the present invention is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present invention, and these deformations and modifications shall fall within the protection scope of the present invention.

Claims

1. A concrete conveying device for a water conservancy project based on the construction of a hydropower station, characterized in that, include: A main body arranged in an inclined tubular shape, wherein the main body is arranged in a coaxial double-cylinder shape; A spiral conveying blade is coaxially rotatably arranged in the body to transport concrete from the lower end to the higher end; The anti-segregation unit is arranged equidistantly along the central axis of the body, and the anti-segregation unit includes: The elastic member is in the shape of an arc plate and is evenly distributed on the inner wall of the body; The graded gas path unit is evenly distributed in the annular gap between the double cylinders of the main body in the circumferential direction, and the graded gas path unit includes: The radial sealing tubes are arranged equidistantly along the central axis of the body, and adjacent radial sealing tubes are connected to each other; A pressure relief plate, which is elastically arranged in the radial sealing tube and is drivingly connected to the top of the elastic part; Among them, the airflow is injected from the first-stage radial sealing tube at the high end, and pushes the first-stage pressure relief plate to be compressed to the limit and the air outlet is exposed to the airflow, and the airflow enters the secondary radial sealing tube and is transmitted to the low end in turn; The pressure relief plate simultaneously pushes the elastic member to protrude radially inward, and forms a composite force field of axial propulsion and radial extrusion with the spiral blades to inhibit the segregation of aggregate and cement.

2. The concrete conveying equipment for hydraulic engineering based on the construction of a hydropower station according to claim 1, characterized in that: A rotating shaft is rotatably arranged in the body, the spiral conveying blade is fixedly connected to the rotating shaft, a guide channel connected to the graded air path unit is opened in the rotating shaft, and the cross-sectional area of the guide channel gradually decreases from the low-end air inlet to the high-end air outlet.

3. The concrete conveying equipment for hydraulic engineering based on the construction of a hydropower station according to claim 2, characterized in that: Negative pressure chambers are equidistantly arranged on the flow guide channel.

4. The concrete conveying equipment for water conservancy projects based on the construction of hydropower stations according to claim 3, characterized in that: Annular cavities are equidistantly provided in the rotating shaft, the flow guide channel is located in the inner ring of the annular cavity, and the two are coaxially arranged, and the annular cavity is connected to the negative pressure cavity.

5. The concrete conveying equipment for water conservancy projects based on the construction of hydropower stations according to claim 4, characterized in that: The annular cavity divides the rotating shaft into multiple sections, and the spiral conveying blades on the surfaces of the corresponding sections are hollow spiral blades and are connected to the annular cavity.

6. The concrete conveying equipment for water conservancy projects based on the construction of hydropower stations according to claim 5, characterized in that: A plurality of negative pressure holes are provided on the axial propulsion surface of the spiral conveying blade.

7. The concrete conveying equipment for water conservancy projects based on the construction of hydropower stations according to claim 6, characterized in that: A hydrophobic membrane is arranged on the negative pressure hole.

8. The concrete conveying equipment for water conservancy projects based on the construction of hydropower stations according to claim 7, characterized in that: The rotating shaft is provided with an air intake section, which is a mesh-shaped pipeline, and the air intake section is connected to the air intake port of the guide channel.

9. The concrete conveying equipment for water conservancy projects based on the construction of hydropower stations according to claim 8, characterized in that: The interior of the main body includes a cavity located at the lower end and a conveying cavity. A flow guide is arranged inside the cavity and is located at the air inlet section of the rotating shaft. The flow guide is arranged in a funnel shape, and the cross-sectional area from the air inlet to the air outlet gradually decreases. The cavity wall on one side of the cavity is arranged in a mesh shape.

10. The concrete conveying equipment for water conservancy projects based on the construction of hydropower stations according to claim 9, characterized in that: The lower end surface of the rotating shaft is evenly distributed with centrifugal blades in the axial direction, and the centrifugal blades are located at the air inlet of the guide member.

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