A cement powder long distance conveying system

Abstract

The application discloses a cement powder long-distance conveying system, and belongs to the field of cement processing, which comprises a conveying pipe, wherein the conveying pipe is provided with several sections, and the sections are arranged in steps; an inclined section is arranged on the conveying pipe, a protection device for prolonging the service life of a bend pipe between the inclined section and the conveying pipe is arranged at the bend pipe, and a driving device for conveying cement powder and preventing cement powder from depositing in the conveying pipe is arranged on the horizontal section of the conveying pipe. The cement in different sections of the pipe can be conveyed in stages through the step-shaped conveying pipe, the driving device arranged on the conveying pipe and the air conveying device between the two conveying pipes can make the cement continuously move in the pipe, reduce the blockage of the cement and facilitate dredging.

Description

Technical Field

[0001] This invention belongs to the field of cement processing technology, specifically a long-distance cement powder conveying system. Background Technology

[0002] Cement is a commonly used building material in construction projects. During the sales process, cement is often packaged in bags for convenient transportation. For some fixed delivery locations, pipelines and pneumatic conveying are often used for transportation, which can save transportation costs and greatly reduce dust generation during transportation. Compared with bagged transportation, it is more environmentally friendly.

[0003] Because of cement's high density, wind speed and force decrease as the transportation distance increases. Cement easily settles in the pipes, causing blockages and hindering normal transportation. Increasing the wind force, on the other hand, increases transportation costs. Furthermore, the transportation pipes are not straight; they have many bends. When cement powder turns within these bends, it directly impacts the pipe walls. Over time, this causes continuous damage to the bends, leading to punctures and reduced lifespan. Additionally, the reduced wind speed during transportation affects the transmission efficiency.

[0004] Therefore, a cement conveying system that can better adapt to long distances is needed. Summary of the Invention

[0005] The purpose of this invention is to address the above problems by providing a long-distance cement powder conveying system that protects the pipe at bends and guides the conveyed cement powder to reduce impact on the bends; it also accelerates the conveying of cement powder within the pipe to reduce blockages.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a long-distance cement powder conveying system, including a conveying pipe, wherein the conveying pipe is provided with several sections, and the several sections of the conveying pipe are interconnected and arranged in a stepped manner.

[0007] An inclined section is provided on the conveying pipe, and a protective device to improve the service life of the elbow is provided at the elbow joint between the inclined section and the conveying pipe.

[0008] The horizontal section of the conveying pipe is equipped with a drive device for conveying cement powder and preventing cement powder from depositing inside the conveying pipe.

[0009] As a further improvement to the above technical solution, the protection device includes a flow guide disposed on the inner wall of the elbow pipe at the junction of the conveying pipe and the inclined section.

[0010] As a further improvement to the above technical solution, the guide element is a spiral guide plate.

[0011] As a further improvement to the above technical solution, the protective device also includes a sleeve fitted onto the outer surface of the elbow at the junction of the conveying pipe and the inclined section.

[0012] As a further improvement to the above technical solution, the driving device includes an exhaust component that extends into the inside of the conveying pipe and can reciprocate within the conveying pipe.

[0013] The exhaust unit is connected to an air source that drives the movement and transmission of cement powder.

[0014] As a further improvement to the above technical solution, the exhaust component is connected to a drive mechanism that drives the exhaust component to swing and controls the staged exhaust within the exhaust component.

[0015] The driving mechanism includes a first control valve disposed at the air inlet end of the exhaust component. One end of the first control valve is fixedly connected to a sliding component. A telescopic component is slidably disposed inside the sliding component. A rotating component is hinged to the telescopic component. When the rotating component rotates, it drives the exhaust component to swing and expel air.

[0016] As a further improvement to the above technical solution, the first control valve is T-shaped, the exhaust component and the sliding component are located at opposite ends of the same straight line, and the other end is the air inlet end;

[0017] The first control valve has a first valve core that is elastically and movably inserted into the sliding member. The first valve core can contact the telescopic member, and the telescopic member can push the first valve core to close the first control valve.

[0018] As a further improvement to the above technical solution, the drive mechanism also includes a second control valve disposed on the exhaust component, wherein a normally open second valve core is elastically and movably disposed on the second control valve, and a guide plate that compresses the second valve core is fixedly disposed above the second valve core.

[0019] When the second valve core swings with the exhaust component, it can contact the guide plate and close the second control valve.

[0020] As a further improvement to the above technical solution, the air inlet end of the conveying pipe is connected to a feed pipe, and a fan is also provided on the conveying pipe to push cement powder into the conveying pipe.

[0021] As a further improvement to the above technical solution, a pneumatic conveying device is provided at the connection between several sections of the conveying pipe to accelerate the conveying of cement within the conveying pipe.

[0022] The beneficial effects of this invention are:

[0023] 1. This invention provides a long-distance cement powder conveying system. By setting a stepped conveying pipe, cement in different sections of the pipe can be conveyed in stages. The driving device set on the conveying pipe and the air conveying device between the two conveying pipes can enable the cement to move continuously in the pipe, reduce cement blockage, and facilitate unblocking.

[0024] 2. The installed drive device can blow air into the conveying pipe in stages, and the exhaust component oscillates during blowing and adjusts the air volume according to the position. This allows the cement to be blown and conveyed at different positions during the blowing process. When the oscillation reaches a position close to perpendicular to the pipe wall, the air output is reduced to prevent the air from hitting the pipe wall and forming a reverse airflow, thus avoiding the cement being conveyed in the opposite direction and reducing the loss of the original air force in the pipe.

[0025] 3. At the junction of the conveying pipe and the inclined section, the elbow is equipped with a guide and a protective sleeve. This protects the elbow and prevents cement powder from impacting the pipe wall during the bend, thus avoiding defects. The guide is a spiral-shaped guide plate that directly faces the incoming cement powder. The cement powder impacts the guide without impacting the pipe wall. The spiral guide also guides the cement in the wind, allowing it to flow gently into the inclined section or conveying pipe, reducing obstruction of wind force and minimizing energy loss at the elbow. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the protection device;

[0028] Figure 3 for Figure 2 A schematic diagram of the half-section structure in the middle;

[0029] Figure 4 for Figure 1 A schematic diagram of the drive unit at point A in the middle;

[0030] Figure 5 for Figure 4 A magnified view of the structure at point B in the middle;

[0031] Figure 6 A simplified schematic diagram of the exhaust component at the four positions m, n, o, and p;

[0032] Figure 7 This is a schematic diagram showing the working status of the exhaust component, the first control valve, and the second control valve at point m.

[0033] Figure 8 This is a schematic diagram showing the working status of the exhaust component, the first control valve, and the second control valve at position n.

[0034] Figure 9 This is a schematic diagram showing the working status of the exhaust component, the first control valve, and the second control valve at point o.

[0035] Figure 10 This is a schematic diagram showing the working status of the exhaust component, the first control valve, and the second control valve at point p.

[0036] Figure 11 The graph shows the air output of the exhaust component and the effective opening degree of the first and second control valves at different positions.

[0037] The text labels in the figure represent: 10, conveying pipe; 101, inclined section; 11, fan; 12, guide component; 13, sheath; 14, exhaust component; 15, first control valve; 151, first valve core; 16, sliding component; 17, telescopic component; 18, rotating component; 19, second control valve; 191, second valve core; 192, guide plate; 20, feed pipe; 21, connecting pipe; 22, stirring plate. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0039] As per the instruction manual Figure 1-11As shown in the figure, as a specific embodiment of the present invention, the specific structure of the present invention is as follows: a long-distance cement powder conveying system, including a conveying pipe 10, wherein the conveying pipe 10 is provided with several sections, and the several sections of the conveying pipe 10 are interconnected and arranged in a stepped manner. The air inlet end of the conveying pipe 10 is connected to a feed pipe 20. A fan 11 is also provided on the conveying pipe 10 to push the cement powder into the conveying pipe 10. During conveying, the processed cement powder is conveyed into the conveying pipe 10 through the feed pipe 20. When the fan 11 is started, it can blow the cement powder and convey the cement powder into the conveying pipe 10. The connection between the several sections of the conveying pipe 10 is provided with a drive for the cement powder to move into the conveying pipe 10. The conveying device in the conveying pipe 10 accelerates the conveying speed of cement powder. The conveying device includes a connecting pipe 21 between the two sections of the conveying pipe 10. An agitator 22 is rotatably installed in the connecting pipe to agitate the cement powder. A drive motor is connected to the agitator 22. A pipe for blowing air into the conveying pipe 10 is provided at the end of the connecting pipe 21. After the agitator 22 rotates and agitates the cement powder, air can be blown into the conveying pipe 10 through the pipe to quickly convey the rolled-up cement powder forward. After the agitator 22 rotates, it can also generate airflow in the direction of the conveying pipe 10, which plays a conveying role.

[0040] The conveying pipe 10 is provided with an inclined section 101, which is a transition from the horizontal section to the vertical section of the conveying pipe 10. This allows the wind speed and cement powder in the horizontal section of the conveying pipe 10 to smoothly transition to the vertical section, thereby reducing the reverse flow formed after direct impact with the pipe wall, thus reducing losses. In addition, the angle of contact between the wind force and the cement powder is reduced, which reduces the impact on the pipe wall and also protects the pipe wall at the bend. A protective device is provided at the bend where the inclined section 101 and the conveying pipe 10 meet. The protective device mainly protects the bend wall at the connection, reduces the impact on the pipe wall, and improves the service life of the bend.

[0041] The horizontal section of the conveying pipe 10 is equipped with a driving device to drive cement powder forward. The driving device further accelerates the conveying of cement powder that is prone to deposit in the horizontal section, preventing it from depositing and clogging the pipe.

[0042] See attached document Figure 2 , 3As shown, based on the above embodiment, further optimization is made: the protection device includes a guide element 12 disposed on the inner wall of the elbow pipe at the junction of the conveying pipe 10 and the inclined section 101. Specifically, the guide element 12 is a spiral guide plate. The spiral guide plate can guide the wind and cement during the conveying process, so that the wind and cement can transition from the horizontal section to the inclined section 101 in a gentle manner, which can reduce the obstruction of the wind force, and the wind blown in directly contacts the guide element 12 without impacting the pipe wall, which can protect the pipe wall and improve its service life.

[0043] The protective device also includes a sleeve 13 that is fitted onto the outer surface of the elbow pipe at the junction of the conveying pipe 10 and the inclined section 101. The sleeve 13 is a sleeve adapted to the shape of the elbow pipe at the junction and mainly serves to thicken and protect the outer wall of the elbow pipe at the junction.

[0044] As per the instruction manual Figure 4 , 5 As shown, based on the above embodiment, further optimization is made: the driving device includes an exhaust component 14 that extends into the inside of the conveying pipe 10 and can reciprocate within the conveying pipe 10. The exhaust component 14 is specifically an exhaust pipe, specifically an movable groove is provided on the conveying pipe 10 to facilitate the swinging of the conveying pipe 10, and a sealing rubber for sealing is provided between the conveying pipe 10 and the exhaust component 14; a sealing box is provided on the outside of the conveying pipe 10 to seal the conveying pipe 10 and the exhaust component 14 together; the exhaust component 14 and the sealing box are rotatably connected to each other; an air source for driving the movement and transmission of cement powder is connected to the exhaust component 14. During the swinging process, the exhaust component 14 blows air into the conveying pipe 10, causing the cement powder deposited in the conveying pipe 10 to be blown forward and transported.

[0045] The exhaust component 14 is connected to a drive mechanism that drives the exhaust component 14 to swing and controls the staged exhaust within the exhaust component 14. The drive mechanism includes a first control valve 15 disposed at the air inlet end of the exhaust component 14. The exhaust component 14 and the first control valve 15 are interconnected. One end of the first control valve 15 is fixedly connected to a sliding member 16, which is specifically a slide tube. A telescopic member 17 is slidably disposed within the sliding member 16, which is specifically a slide rod. A rotating member 18 is hinged to the telescopic member 17. A drive motor is fixedly disposed on the rotating member 18 and connected to the rotating member 18. When the motor drives the rotating member 18 to rotate, it causes the exhaust component 14 to swing and exhaust air.

[0046] The first control valve 15 is T-shaped, the exhaust component 14 and the sliding component 16 are located at opposite ends of the same straight line, and the other end is the air inlet end;

[0047] The first control valve 15 has a first valve core 151 that is elastically movably inserted into the sliding member 16. Specifically, a spring is provided between the first valve core 151 and the end of the first control valve 15. The spring is located inside the sliding member 16 and pushes the first valve core 151 to move, so that the first control valve 15 is normally open. The first valve core 151 can contact the telescopic member 17. When the rotating member 18 rotates and drives the telescopic member 17 to move, the telescopic member 17 can push the first valve core 151 to close the first control valve 15.

[0048] The drive mechanism also includes a second control valve 19 disposed on the exhaust component 14. A normally open second valve core 191 is elastically and movably disposed on the second control valve 19. A spring is disposed between the inner walls of the second valve core 191 and the second control valve 19. A guide plate 192 is fixedly disposed above the second valve core 191 to compress the second valve core 191. The guide plate 192 is an inner arc-shaped guide plate. A roller is also disposed at the end of the second valve core 191 to facilitate contact between the roller and the guide plate 192.

[0049] When the second valve core 191 swings with the exhaust component 14, the center point of the swing is the hinge center point of the exhaust component 14, which can contact the guide plate 192 and close the second control valve 19. The second control valve 19 and the first control valve 15 are arranged in series. Through the cooperation of the opening and closing of the first control valve 15 and the second control valve 19 in different states, the exhaust volume of the exhaust component 14 is controlled. In conjunction with the swing of the conveying pipe 10, the cement powder deposited in the conveying pipe 10 is blown away to reduce the accumulation of cement powder in the conveying pipe 10 and keep the conveying smooth.

[0050] For details on the specific operation of the drive mechanism, please refer to the instruction manual appendix. Figure 6-11 The diagram shows the working state of the exhaust duct at different locations, with points m, n, o, and p as the extreme points.

[0051] As attached Figure 7 As shown, when at point m, the telescopic member 17 has the minimum extension distance. The telescopic member 17 pushes the first valve core 151 to close the first control valve 15. At this time, there is no squeezing force between the second valve core 191 and the guide plate 192. The second control valve 19 opens. At this time, the air inside the entire exhaust component 14 is cut off and cannot be sent out.

[0052] As attached Figure 8 As shown, at position n, the telescopic component 17 extends outward, the first valve core 151 opens, the first control valve 15 is connected, and the second control valve 19 remains open. At this time, air can be normally supplied to the exhaust component 14, and the air volume is at its maximum at this time.

[0053] During the movement from point m to point n, the first control valve 15 slowly opens from the closed state, and the air volume also begins to increase slowly. In addition, the swing angle of the exhaust component 14 increases during the swing process, which can make the air volume of the exhaust component 14 increase as it gets closer to the tilted state, thereby reducing the backflow hitting the pipe wall when the air is discharged, and affecting the original wind speed in the delivery pipe 10.

[0054] As attached Figure 9 As shown, at position o, the telescopic member 17 extends outward to its maximum extent, and the first control valve 15 is connected. However, since the air output of the first control valve 15 is limited, once the maximum air output of the first control valve 15 is reached, even if the extension range of the telescopic member 17 increases, it will not affect the air output of the first control valve 15. Therefore, once the effective opening of the first control valve 15 is reached, the maximum air output of the first control valve 15 is reached. Even if the opening degree of the first control valve 15 is increased, it will not affect the air output within the first control valve 15. Similarly, once the air output of the second control valve 19 reaches its maximum, even if the opening degree of the second control valve 19 is increased, it will not affect the amount of air output. The maximum air output is the opening degree of the maximum effective opening degree. At this position, the second valve core 191 has already made some contact with the guide plate 192, the effective opening degree of the second control valve 19 decreases, and the air output begins to decrease.

[0055] During the movement from point n to point o, the extension of the telescopic component 17 gradually extends to its maximum, but the effective opening and closing of the first control valve 15 remains at its maximum value, while the effective opening and closing of the second control valve 19 has begun to decrease. Therefore, the air output of the exhaust component 14 has begun to decrease.

[0056] As attached Figure 10 As shown, at point p, the telescopic component 17 has begun to retract to contact the first valve core 151, but the first control valve 15 is still fully open. The second valve core 191 contacts the guide plate 192, causing the second control valve 19 to shut off. At this time, the second control valve 19 has the minimum opening degree. At this time, the exhaust component 14 is shut off and cannot exhaust air into the delivery pipe 10.

[0057] During the movement from point O to point P, the telescopic component 17 gradually contracts, but this does not affect the effective opening and closing degree of the first control valve 15. At point P, the telescopic component 17 and the first valve core 151 are in contact. The degree of compression between the second valve core 191 and the guide plate 192 gradually increases, reaching its maximum at point P. At this time, the effective opening and closing degree of the second control valve 19 gradually decreases to its minimum, and the air output of the exhaust component 14 is reduced to its minimum.

[0058] During the movement from point p to point m, the telescopic member 17 continues to contract, and the telescopic member 17 squeezes the first valve core 151, causing the effective opening degree of the first control valve 15 to gradually decrease, reaching its minimum at point m; while the degree of compression between the second valve core 191 and the guide plate 192 gradually decreases, causing the effective opening degree of the second control valve 19 to gradually increase. Therefore, the air output of the entire exhaust component 14 gradually increases at first, but after a certain increase, the air output gradually decreases.

[0059] According to the appendix Figure 8 As shown, point p is the position where the exhaust component 14 swings closest to the vertical direction. At point p, the greater the backflow generated by blowing air onto the pipe wall, the more it will affect the original airflow in the conveying pipe 10. Therefore, during the movement from point o to point p, the air volume needs to be gradually reduced. Conversely, during the movement from point p to point m, the air volume increases or there is no airflow, so there will not be much backflow. During the movement from point m to point n, the exhaust volume gradually increases, the backflow generated is smaller, and the acceleration effect is better. By continuously changing the position and airflow force of the exhaust, the deposited cement powder can be conveyed by blowing air, reducing accumulation.

[0060] Based on the above effects, the air output of the exhaust component 14, the effective opening and closing degree of the first control valve, and the second control valve are plotted as shown in the attached figure. Figure 11 The line graph shown can roughly reflect the different states at the four extreme points of m, n, o, and p, thereby achieving the effect of accelerating the wind in the conveying pipe 10, reducing the accumulation of cement powder, and thus effectively improving the conveying effect.

[0061] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0062] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A long-distance cement powder conveying system, comprising a conveying pipe (10), characterized in that: The conveying pipe (10) is provided with several sections, and the several sections of the conveying pipe (10) are interconnected and arranged in a stepped manner. An inclined section (101) is provided on the conveying pipe (10), and a protective device to improve the service life of the elbow is provided at the joint elbow between the inclined section (101) and the conveying pipe (10). The horizontal section of the conveying pipe (10) is provided with a drive device for conveying cement powder and preventing cement powder from depositing inside the conveying pipe (10). The drive device includes an exhaust component (14) that extends into the delivery pipe (10) and can reciprocate within the delivery pipe (10). The exhaust component (14) is connected to an air source that drives the movement and transmission of cement powder; The exhaust component (14) is connected to a drive mechanism that drives the exhaust component (14) to swing and controls the staged exhaust within the exhaust component (14); The driving mechanism includes a first control valve (15) disposed at the air inlet end of the exhaust component (14). One end of the first control valve (15) is fixedly connected to a sliding component (16). A telescopic component (17) is slidably disposed inside the sliding component (16). A rotating component (18) is hinged to the telescopic component (17). When the rotating component (18) rotates, it drives the exhaust component (14) to swing and expel air. The first control valve (15) is T-shaped, the exhaust component (14) and the sliding component (16) are located at opposite ends of the same straight line, and the other end is the air inlet end; The first control valve (15) is elastically and movably provided with a first valve core (151) extending into the sliding member (16). The first valve core (151) can contact each other with the telescopic member (17). The telescopic member (17) can push the first valve core (151) to close the first control valve (15). The drive mechanism also includes a second control valve (19) disposed on the exhaust component (14), a normally open second valve core (191) is elastically and movably disposed on the second control valve (19), and a guide plate (192) is fixedly disposed above the second valve core (191) to squeeze the second valve core (191). When the second valve core (191) swings with the exhaust component (14), it can contact the guide plate (192) and close the second control valve (19).

2. The cement powder long-distance conveying system according to claim 1, characterized in that: The protection device includes a flow guide (12) disposed on the inner wall of the elbow at the junction of the conveying pipe (10) and the inclined section (101).

3. The cement powder long-distance conveying system according to claim 2, characterized in that: The flow guide (12) is a spiral flow guide plate.

4. A long-distance cement powder conveying system according to claim 2, characterized in that: The protective device also includes a sheath (13) fitted onto the outer surface of the elbow pipe at the junction of the conveying pipe (10) and the inclined section (101).

5. A long-distance cement powder conveying system according to any one of claims 1-4, characterized in that: The air inlet end of the conveying pipe (10) is connected to the feed pipe (20), and the conveying pipe (10) is also equipped with a fan (11) to push cement powder into the conveying pipe (10).

6. A long-distance cement powder conveying system according to claim 5, characterized in that: A pneumatic conveying device is provided at the connection between several sections of the conveying pipe (10) to accelerate the conveying of cement within the conveying pipe (10).

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