CN210767881U - Prevent pneumatic concrete conveying system of enhancement mode of gas return - Google Patents
Prevent pneumatic concrete conveying system of enhancement mode of gas return Download PDFInfo
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- CN210767881U CN210767881U CN201921279330.3U CN201921279330U CN210767881U CN 210767881 U CN210767881 U CN 210767881U CN 201921279330 U CN201921279330 U CN 201921279330U CN 210767881 U CN210767881 U CN 210767881U
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Abstract
The utility model discloses a prevent pneumatic concrete conveying system of enhancement mode of gas return mainly includes concrete bunker, spiral auger, automatic turbocharging system, conveying pipeline and support. The concrete bin is divided into an upper storage bin and a lower funnel-shaped conveying bin; the lower end of the conveying bin is vertically inserted into a spiral auger, and one side of a box body of the conveying bin is provided with a driving device; the conveying pipe is a transverse pipeline with one closed end, is positioned below the spiral auger, is provided with an extending section above the pipe wall and is communicated with the spiral auger, and a first flashboard capable of covering the interface is hinged at the interface; the closed end of the transverse pipeline is communicated with an automatic pressurization system; the automatic pressurization system comprises a pressurization cylinder, and the pressurization cylinder is controlled by a crank sliding block mechanism to move.
Description
Technical Field
The utility model relates to a concrete feeding technical field mainly relates to a prevent pneumatic concrete feeding system of enhancement mode of gas return.
Background
The guniting technology has the effect of light weight in the fields of constructional engineering, mineral engineering, even decoration engineering and the like, cement, sand, stone and the like are mixed by adding water in advance, and the mixture is directly sprayed on a sprayed surface after being pumped for a certain distance, so that the strength of the sprayed material is higher and the material is uniformly distributed, the whole equipment is simple in process and easy to operate, and the current application range is extremely wide.
However, a certain problem exists, on one hand, mixed concrete is difficult to output smoothly in a high efficiency, so that a conveying pump is required to output materials, a conveying cylinder of the conventional conveying pump is usually arranged in parallel by two cylinder bodies, a piston of the conveying cylinder is connected with a rear-end driving hydraulic cylinder, a scholars have discussed and proposed a patent (Zhang Fang institute, a concrete wet spraying mechanism, publication No. CN106480886A), vibration can be generated in the piston switching of the two cylinder bodies, the resistance is large when the materials are thick, the pipes are easy to block, the materials are easy to flow back when the materials are thin, and the materials can not be discharged stably and continuously only by pumping the two conveying cylinders, namely, the stable and continuous conveying of the materials is not required.
Stable and continuous feeding is of great importance for concrete guniting operations. The characteristics of continuous and efficient spiral are utilized, the spiral auger replaces a piston, materials in the bin are pushed out of the bin, the materials are spirally output and then blown out by high-pressure gas, continuous conveying of the materials is achieved, the application field of the materials is widened, and greater economic benefits are brought. However, the implementation of the pneumatic screw feeding described above faces the following difficulties:
① problem of gas return, namely, after the material is output from the bin by the spiral auger, high-pressure gas needs to be connected after the material is carried by the conveying section, and how to realize that the high-pressure gas flows out along the conveying pipe and does not flow back to the spiral;
②, the problem of blockage is that the high-pressure gas for conveying materials can be changed under the influence of other factors, once the pressure is reduced, the materials can be blocked or even can not be conveyed continuously, and how to improve the pneumatic power can avoid the blockage of the pipeline caused by the reduction of the air pressure.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to solve the technical problems of pneumatic spiral conveying, the gas at a gas filling point is prevented from flowing back to a spiral to be lost, high-pressure gas is enhanced, material blockage is avoided, and the materials are stably and continuously output in large quantity. The utility model provides a prevent pneumatic concrete conveying system of enhancement mode of gas return adopts the spiral auger to realize the stirring and the transportation of material, is equipped with automatic turbocharging system simultaneously, and the flashboard is ventilated in the cooperation, effectively solves the anti-gas blockage problem that pneumatic defeated material faced.
In order to achieve the above object, the utility model adopts the following technical scheme:
1. the utility model provides a prevent pneumatic concrete conveying system of enhancement mode of breathing which characterized in that: mainly comprises a concrete bin, a spiral auger, an automatic pressurization system and a conveying pipe;
the concrete bin is divided into an upper part and a lower part, the upper part is a storage bin with an upper opening and a lower opening, and the lower part is a funnel-shaped conveying bin; the lower end of the conveying bin is vertically inserted into a spiral auger, and a driving device is arranged on one side of a box body of the spiral auger;
the conveying pipe is a transverse pipeline and is positioned below the spiral auger, a discharge port of the spiral auger is connected with the conveying pipe, and a first flashboard for covering the interface is hinged to the interface; the opening direction of the first flashboard faces one side of the material conveying pipe; one end of the transverse pipeline is connected with the automatic pressurization system and the compressed air inlet, and the other end of the transverse pipeline is a material conveying opening;
the automatic pressurization system comprises a pressurization cylinder; the pressurizing cylinder comprises a pressurizing cylinder body, a piston and a first connecting rod; the pressurizing cylinder body is communicated with the material conveying pipe, a second flashboard for covering the interface is hinged to the interface of the pressurizing cylinder body and the material conveying pipe, and the opening direction of the second flashboard faces one side of the material conveying pipe; the outer wall of the pressurizing cylinder body is provided with an air inlet, the edge of the air inlet is hinged with a third flashboard used for covering the air inlet, the opening direction of the third flashboard faces one side of the pressurizing cylinder body, an elastic part is connected between the third flashboard and the outer wall of the cylinder body, the elastic part is used for overcoming the dead weight of the flashboard under the normal pressure state, and the third flashboard is guaranteed to cover the air inlet.
Furthermore, the driving device further comprises a gear connected to a main shaft on the outer side of the spiral auger, the gear is matched with a disc with turning transmission teeth to drive the disc to rotate, and the piston is fixedly connected to the disc through a slider-crank mechanism.
Further, the system also comprises a plurality of brackets; the conveying pipeline is supported on the working surface through a support.
Furthermore, the open end of the material conveying pipe (40) is connected with a hose (401).
Has the advantages that: the utility model provides a prevent pneumatic concrete conveying system of enhancement mode of angry can obtain following technological effect:
(1) the system provided by the utility model simple structure is convenient for install and maintain. The traditional discharging device is mainly characterized in that a swing cylinder swings between two cylinder bodies with pistons, the pistons push materials in the cylinder bodies to pass through the swing cylinder to a material conveying pipeline, the structure is very complex, the production process requirement is high, and the installation and the maintenance are difficult. Compared with the prior art, the screw driving mode has the advantages of simple implementation method and better effect. Only need drive arrangement provide torsion make the screw axis rotate can, can take the feed bin out with the material in the helical blade rotation process, overall structure is simple, and is lower to the technological requirement during production, labour saving and time saving during the installation, and the good reliability during the operation, the later maintenance of being convenient for.
(2) And the working mode of spiral discharging is adopted, so that the working efficiency and the continuity are improved. In the traditional material output process, pistons in two cylinder bodies reciprocate alternately, so that the problems of low self movement speed of the pistons and time difference generated in the alternate process of the two cylinder bodies exist, and the swinging speed of the swing cylinder is greatly influenced by the viscosity of materials. Because the spiral rotation in-process, self resistance is very little, no matter material viscosity height can all move along ejection of compact direction in succession, can not receive the restriction basically, so equipment can high-efficient continuous defeated department material.
(3) Three flashboards are respectively arranged, and the automatic opening or closing is realized under the control of the internal and external air pressure difference, so that the back flow and the material backflow are prevented. Because the compressed air inlet is arranged, the problem of gas return in the conveying process must be solved, and high-pressure gas is subjected to loss in the direction of reverse discharging on one hand, so that the conveying capacity is reduced due to pressure loss, and the whole gas quantity is lost; on the other hand, the material can be blown back, and the output of the material is seriously hindered. By arranging the gate plate, when the pressure of the high-pressure gas is greater than the pressure at the discharging position, the gate plate is in a closed state along the direction of the high-pressure gas, and the backflow of reverse gas and materials is prevented; when the pressure of the high-pressure gas is less than the pressure at the discharge part, the flashboard is in an open state along the material flowing direction at the discharge part, and the material flows into the front end of the gas transmission pipe and is blown out under the action of the high-pressure gas. The whole process has no material reflux and gas return phenomenon.
(4) And an automatic pressure cylinder is adopted to supplement gas, so that the pneumatic conveying capacity is enhanced, and the material blockage is prevented. At present, the technical means for conveying concrete by using gas in the market needs gas with pressure of 0.4-0.6 MPa or even higher, otherwise, the concrete cannot be conveyed. In actual work, the types and the quantity of equipment depending on high-pressure gas are large, the supply quantity of the high-pressure gas is often insufficient, the pressure and the gas quantity of the gas are limited, and the pressure reduction can block a pipeline or even cannot provide conveying power. This system is equipped with automatic pressure cylinder, with the help of the crank block of simple and easy structure, adopts drive arrangement unified supply screw thread auger and pressure cylinder's work, as long as helical blade rotates will last increase high-pressure gas in to the conveying pipeline, not only prevents the material because of the jam problem that atmospheric pressure is low and produce, possesses stronger transport capacity moreover.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged view of a portion of the anti-blowback apparatus;
fig. 3 is a partial enlarged view of the automatic supercharging system.
Reference is made to the accompanying drawings in which:
10-a concrete silo; 20-a spiral auger; 201-a helical axis; 202-helical blades; 203-a drive device; 204-gear; 205-a first ram; 206-auger internal material; 30-an automatic pressurization system; 301-a second shutter; 302-a third gate; 303-an elastic member; 304-a piston; 305-a first link; 306-a first rotational joint; 307-a second link; 308-a second rotational joint; 309-disk; 310-a compressed air inlet; 40-a material conveying pipe; 401-a hose; 402-conveying pipeline internal cavity; 50-bracket.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
As shown in figure 1, the enhanced pneumatic concrete conveying system for preventing gas return mainly comprises a concrete silo 10, a spiral auger 20, an automatic pressurization system 30, a conveying pipeline 40 and a support 50.
The concrete bin 10 is divided into an upper part and a lower part, wherein the upper part is a storage bin with an upper opening and a lower opening, the lower part is a funnel-shaped conveying bin, and the lower end opening of the storage bin is fixedly connected with the upper end opening of the conveying bin. The upper part is used for containing the evenly mixed materials, and the lower part is provided with an opening which can lead the materials to fall onto the helical blade 202 of the helical auger 20 under the action of self weight.
The concrete bin 10 is vertically inserted into the spiral auger 20. A spiral shaft 201 is arranged along the axis direction of a cylinder of the spiral auger 20, and a sheet-shaped spiral blade 202 is arranged on the outer surface of the spiral shaft 201. The end part of the screw shaft 201 positioned outside the right box body of the screw auger is provided with a driving device 203. The side surface of the lower part of the spiral auger 20 is provided with a material conveying hole. The conveying pipe 40 is a transverse pipeline with one closed end, is positioned below the spiral auger 20, and is supported on the working surface through a support 50. The upper part of the pipe wall is provided with an extending section which is communicated with the material conveying hole, the interface of the pipe wall is hinged with a first gate plate 205 which can cover the interface, and the first gate plate 205 faces one side of the material conveying pipe. The closed end of the transverse conduit is connected to an automatic pressurization system 30.
The driving device 203 provides torque force to drive the spiral shaft 201 to drive the spiral blade 202 to rotate, so as to drive the material to be conveyed to the extending section of the conveying pipe 40 along the spiral auger 20 in a single direction (from right to left as shown in fig. 1), and the material is output from the inside to the outside of the concrete silo 10. The output material is acted on by high-pressure gas from a compressed air inlet 310 in the conveying pipe to realize unidirectional conveying (from right to left in the figure 1). The left end tail of the material conveying pipe 40 adopts a hose 401 so that the materials can be output to a target position at any angle.
As shown in FIG. 2, the first gate plate 205 can realize the opening and closing of the material conveying hole under the combined action of the high-pressure gas and the spiral auger. The specific working principle is as follows:
when the system normally operates, the pressure of the material 206 in the spiral auger is P1The pressure of the inner cavity 402 of the delivery pipe 40 is P2. When P is present1≥P2When the pressure on the upper part of the first gate plate 205 is higher than that on the lower part, the gate plate is opened downwards, the screw shaft 201 drives the screw blade 202 to push the material to the lower part of the first gate plate 205, and the material is conveyed to a material conveying opening from right to left under the action of input compressed air; when P is present1＜P2When the pressure on the upper part of the first gate plate 205 is smaller than that on the lower part, the gate plate is closed upwards, the material conveying hole is closed, and the compressed air flows out along the material conveying pipe 40. The whole process has no gas return and no material backflow.
As shown in FIG. 3, the automatic pressurizing system 30 comprises a compressed air inlet 310 communicating with the right end of the transverse section of the feed conveyor pipe 40, and a cylindrical pressurizing cylinder provided with a second shutter plate 301 and a third shutter plate 302. The compressed air inlet 310 and the pressurizing cylinder are both arranged along the direction of the axis of the transverse pipe. The left end of the pressure cylinder is communicated with the closed end of the material conveying pipe 40, and is hinged with a second gate plate 301 for covering the interface, and the second gate plate 301 is positioned on the inner side of the material conveying pipe 40. An air inlet hole is formed in the outer wall of the pressure cylinder, and a third gate plate 302 is hinged to the edge of the through hole. The third shutter plate 302 faces the inside of the pressurizing cylinder, covering the intake port. An elastic part 303 is connected between the third flashboard and the outer wall of the cylinder body and used for overcoming the dead weight of the flashboard under the normal pressure state and ensuring that the third flashboard covers the air inlet. The booster cylinder controls the movement of the piston 304 through a slider-crank mechanism. The crank slider mechanism comprises a second rotary joint 308 fixed on a disc 309, two ends of a second connecting rod 307 are respectively connected with a first rotary joint 306 and the second rotary joint 308, the first rotary joint 306 is respectively connected with a first connecting rod 305 and a second connecting rod 307, the first connecting rod 305 is arranged along the central axis of the pressure cylinder, and a piston 304 is fixedly connected with the first connecting rod 305. The pressurizing cylinder is driven in the following way:
the tail end of the extending end of the spiral shaft 201, which is positioned outside the box body, is provided with a gear 204, the disc 309 is provided with a direction-changing transmission gear, the piston 304 of the pressure cylinder is fixedly connected to the edge of the disc 309 through a slider-crank mechanism, and is meshed with the disc through the gear, and the rotation of the spiral shaft drives the disc 309 to rotate, so that the slider-crank mechanism is driven to realize reciprocating motion.
The working principle of the pressure cylinder is as follows:
let the atmospheric pressure be P0The internal pressure of the supercharging cylinder body is PIThe pressure of the inner cavity 402 of the delivery pipe 40 is P2. The start time, P, of the piston 304 moving leftward from the rightmost end of the cylinder to compress the gasI＝P0<<P2. Both the second shutter 301 and the third shutter 302 are in a closed state. The piston 304 continues to compress the cylinder gas until PI＞P2When the second gate plate 301 is opened, the cylinder body compressed gas is supplemented to the material conveying pipe 40, and the power for gas conveying is increased. P begins when the piston 304 makes a return stroke from the leftmost end of the cylinder to the rightI<P0<P2The second shutter 301 is closed, and the third shutter 302 is closed by being pressed by the piston 304. When the left end surface of the piston 304 moves to the right end of the third shutter plate 302 as the piston 304 continues to move to the right, due to PI<<P0Third shutter 302 is opened by atmospheric pressure and cylinder is charged to PI＝P0And then closed until the piston 304 moves to the rightmost end of the cylinder body, and one movement cycle is finished. When the next period starts, along with the continuous rotation of the driving device 203, the piston continuously and periodically moves, compressed gas is automatically supplemented, the pneumatic conveying capacity is enhanced, and material blockage is prevented.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (4)
1. The utility model provides a prevent pneumatic concrete conveying system of enhancement mode of breathing which characterized in that: mainly comprises a concrete bin (10), a spiral auger (20), an automatic pressurization system (30) and a conveying pipe (40);
the concrete bin (10) is divided into an upper part and a lower part, wherein the upper part is a storage bin with an upper opening and a lower opening, and the lower part is a funnel-shaped conveying bin; the lower end of the conveying bin is vertically inserted into a spiral auger (20), and a driving device (203) is installed on one side of a box body of the spiral auger (20);
the conveying pipe (40) is a transverse pipeline and is positioned below the spiral auger (20), a discharge port of the spiral auger (20) is connected with the conveying pipe (40), and a first flashboard (205) for covering the interface is hinged to the interface; the opening direction of the first gate plate (205) faces one side of the material conveying pipe; one end of the transverse pipeline is connected with the automatic pressurization system (30) and the compressed air inlet (310), and the other end of the transverse pipeline is provided with a material conveying port;
the automatic pressurization system (30) comprises a pressurization cylinder; the booster cylinder includes a booster cylinder body, a piston (304), and a first connecting rod (305); the pressurizing cylinder body is communicated with the conveying pipe (40), a second gate plate (301) for covering the interface is hinged to the interface of the pressurizing cylinder body and the conveying pipe, and the opening direction of the second gate plate (301) faces to one side of the conveying pipe; the outer wall of the pressurizing cylinder body is provided with an air inlet, the edge of the air inlet is hinged with a third flashboard (302) used for covering the air inlet, the opening direction of the third flashboard (302) faces one side of the pressurizing cylinder body, and an elastic part (303) is connected between the third flashboard and the outer wall of the cylinder body and used for overcoming the dead weight of the flashboard under the normal pressure state and ensuring that the third flashboard covers the air inlet.
2. An enhanced pneumatic concrete conveying system against blowback according to claim 1, characterized in that: the driving device (203) further comprises a gear (204) connected to a spindle on the outer side of the spiral auger, the gear (204) is matched with a disc (309) with a turning transmission gear to drive the disc (309) to rotate, and the piston (304) is fixedly connected to the disc (309) through a crank-slider mechanism.
3. An enhanced pneumatic concrete conveying system against blowback according to claim 1, characterized in that: also comprises a plurality of brackets (50); the conveying pipe (40) is supported on the working surface through a bracket (50).
4. An enhanced pneumatic concrete conveying system against blowback according to claim 1, characterized in that: the open end of the material conveying pipe (40) is connected with a hose (401).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921279330.3U CN210767881U (en) | 2019-08-08 | 2019-08-08 | Prevent pneumatic concrete conveying system of enhancement mode of gas return |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921279330.3U CN210767881U (en) | 2019-08-08 | 2019-08-08 | Prevent pneumatic concrete conveying system of enhancement mode of gas return |
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| CN210767881U true CN210767881U (en) | 2020-06-16 |
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| CN201921279330.3U Active CN210767881U (en) | 2019-08-08 | 2019-08-08 | Prevent pneumatic concrete conveying system of enhancement mode of gas return |
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