Air supply nozzle for pneumatic conveying

Abstract

The utility model discloses an air supply nozzle for pneumatic conveying, which is applied to the technical field of pneumatic conveying and comprises a connecting pipeline, two ends of the connecting pipeline are communicated with a main conveying pipeline, and one side of the top of the connecting pipeline is fixedly connected with an air supply pipeline. And the elasticity of the spring can be overcome through the supplemented compressed air, so that a gap is formed between the conical sliding plate and the L-shaped pipeline to convey gas. And after gas supply is stopped, the gap can be automatically closed by utilizing resilience force of the spring, so that gas backflow is prevented, the gas supply nozzle is prevented from being blocked, and gas conveying smoothness is ensured. Compressed air spirally flows in the L-shaped pipeline, so that the compressed air can be quickly fused with original compressed air and powdery solids. And meanwhile, the stirring fan blades are driven by gas to stir the powdery solid, so that the powdery solid is prevented from being accumulated in the connecting pipeline, and the pneumatic conveying efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pneumatic conveying, in particular to an air supply nozzle for pneumatic conveying. Background Art

[0002] In pneumatic conveying systems, powdered solids need to be fully mixed with compressed air to achieve smooth conveying.

[0003] Currently, a Chinese utility model, publication number CN205820373U, discloses an air supply nozzle for pneumatic conveying. The left portion of the outer ring of steel pipe A is provided with flange A; the left portion of the outer ring of steel pipe B is provided with flange B; the right portion of the outer ring of steel pipe B is provided with a nozzle body. The left portion of the nozzle body is provided with a cylindrical barrel. A one-way valve is connected to the top of the cylindrical barrel via a pipeline. Above the one-way valve is a compressed air inlet. A base plate with a center hole is provided at the left end of the cylindrical barrel and welded to the outer ring of steel pipe B. A bell-shaped structure is connected to the right end of the cylindrical barrel. The right end of the bell-shaped structure is a small end, and the opening of the small end is connected to the left end of steel pipe A. A gap of dimension L is provided between the right end of steel pipe B and the inner wall of the bell-shaped structure. This utility model has a rational structure. When materials pass through, compressed air disturbs and propels them, preventing pipe blockage, ensuring smooth operation of the airflow conveying system, and improving the efficiency of pneumatic conveying. Its widespread application has good economic and social benefits.

[0004] Since some of the pipes in the pneumatic conveying system are relatively long, there is a phenomenon of insufficient compressed air conveying force and accumulation of powdered solids. In order to avoid this phenomenon, it is necessary to install an air supply nozzle in the middle of the longer pipe to replenish compressed air and ensure the power of the compressed air. When the existing air supply nozzle stops replenishing air, the high gas pressure inside the main pipe will drive the powdered solids to flow back into the air supply pipe. For a long time, it is easy to cause the air supply nozzle to be blocked, reducing the gas flowability. At the same time, when the air supply nozzle replenishes compressed gas, the fluidity of the compressed gas is relatively simple and cannot be quickly mixed with the compressed air and powdered solids inside the main pipe. Therefore, it is difficult to effectively drive the rapid transportation of powdered solids, and the use effect is poor. Utility Model Content

[0005] The utility model aims to provide an air supply nozzle for pneumatic conveying, which has the advantages of preventing gas backflow, avoiding clogging of the air supply nozzle and improving the mixing efficiency of the supplementary compressed air and powdered solids, thereby ensuring the conveying effect.

[0006] The above technical purpose of the present utility model is achieved through the following technical solutions: an air-supplementing nozzle for pneumatic conveying, comprising a connecting pipe, wherein both ends of the connecting pipe are connected to a main conveying pipe, one side of the top of the connecting pipe is fixedly connected to an air-supplementing pipe, the bottom of the air-supplementing pipe is fixedly connected to an L-shaped pipe connected to the inside of the connecting pipe, a conical groove is provided inside the L-shaped pipe, a bracket is fixedly connected to the inside of the L-shaped pipe, a sliding rod is slidably connected to the inside of the bracket, one end of the sliding rod in the conical groove inside the L-shaped pipe is fixedly connected to the same conical slide, and the surface of the sliding rod away from the conical slide is slidably sleeved with a spring fixedly connected to the bracket.

[0007] By adopting the above technical solution, the elastic force of the spring can be overcome by the supplementary compressed air, so that a gap is created between the conical slide and the L-shaped pipe to transport gas. When the air supply stops, the gap can be automatically closed by the rebound force of the spring, thereby preventing the backflow of gas, avoiding the blockage of the air supply nozzle, and ensuring the smooth flow of gas. The compressed air flows in a spiral shape inside the L-shaped pipe, so that it can quickly merge with the original compressed air and powdered solids. At the same time, the gas is used to drive the stirring blades to stir the powdered solids, thereby preventing the powdered solids from accumulating inside the connecting pipe and improving the efficiency of pneumatic conveying.

[0008] The utility model is further configured as follows: a fixing rod is provided at one end of the L-shaped pipe away from the air supply pipe, the surface of the fixing rod is fixedly sleeved with an auger blade fixedly connected to the inner wall of the L-shaped pipe, and the end of the fixing rod away from the air supply pipe is rotatably connected to a stirring fan blade.

[0009] The above technical solution is adopted to prevent powdered solids from accumulating inside the connecting pipe, thereby improving the pneumatic conveying efficiency.

[0010] The utility model is further configured as follows: first flanges are welded at both ends of the connecting pipe, and the two ends of the connecting pipe are bolted to the main conveying pipe through the first flanges.

[0011] By adopting the above technical solution, the connecting pipe can be installed on the main conveying pipe using the first flange, and it is also convenient for disassembly and maintenance.

[0012] The utility model is further configured as follows: a sealing ring is bonded between the connecting pipe and the main conveying pipe.

[0013] By adopting the above technical solution, the sealing performance of the connecting pipe and the main transmission pipe after installation is improved to prevent gas leakage.

[0014] The utility model is further configured as follows: one end of the sliding rod away from the conical slide is fixedly connected to an arc block which is clamped with one end of the spring away from the bracket.

[0015] The above technical solution is adopted to facilitate guiding the gas to both sides, thereby reducing the resistance of the gas to the arc block.

[0016] The utility model is further configured as follows: a sealing gasket is fixedly sleeved on the surface of the conical slide and is slidably connected to the inner wall of the L-shaped pipe.

[0017] By adopting the above technical solution, the sealing performance of the conical slide plate and the conical groove section of the arc block is improved, and the reverse flow of gas is prevented.

[0018] The utility model is further configured as follows: a second flange is fixedly connected to the top of the air supply pipeline.

[0019] The above technical solution facilitates the sealed connection between the air supply pipeline and the output end of the compressed air pump for air supply, thereby ensuring air tightness.

[0020] In summary, the present invention has the following beneficial effects:

[0021] 1. The added compressed air can overcome the elastic force of the spring, thus creating a gap between the tapered slide and the L-shaped pipe to transport gas. When the air supply stops, the spring's rebound force can automatically close the gap, thereby preventing gas backflow and clogging of the air supply nozzle, ensuring smooth gas delivery.

[0022] 2. The compressed air flows in a spiral shape inside the L-shaped pipe, allowing it to quickly merge with the original compressed air and powdered solids. At the same time, the gas drives the stirring blades to stir the powdered solids, thereby preventing the powdered solids from accumulating inside the connecting pipe and improving the pneumatic conveying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a cross-sectional view of the structure of the utility model;

[0025] Figure 3 It is a side sectional view of the local structure of the utility model.

[0026] Figure numerals: 1. connecting pipe; 2. main delivery pipe; 3. air supply pipe; 4. L-shaped pipe; 5. bracket; 6. sliding rod; 7. conical slide plate; 8. spring; 9. fixing rod; 10. auger blade; 11. stirring fan blade; 12. first flange; 13. sealing ring; 14. arc block; 15. sealing gasket; 16. second flange. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings.

[0028] Example 1:

[0029] refer to Figure 1 、 Figure 2 、 Figure 3 A gas supply nozzle for pneumatic conveying includes a connecting pipe 1, wherein both ends of the connecting pipe 1 are connected to a main conveying pipe 2, a gas supply pipe 3 is fixedly connected to one side of the top of the connecting pipe 1, and an L-shaped pipe 4 connected to the inside of the connecting pipe 1 is fixedly connected to the bottom of the gas supply pipe 3, a conical groove is provided inside the L-shaped pipe 4, a bracket 5 is fixedly connected to the inside of the L-shaped pipe 4, a sliding rod 6 is slidably connected to the inside of the bracket 5, and the sliding rod 6 is fixedly connected to the same conical slide 7 at one end of the sliding rod 6 in the conical groove inside the L-shaped pipe 4, and a spring 8 fixedly connected to the bracket 5 is slidably sleeved on the surface of the sliding rod 6 away from the end of the conical slide 7. The elastic force of the spring 8 can be overcome by the supplementary compressed air, so that a gap is generated between the conical slide 7 and the L-shaped pipe 4 for conveying gas. When the gas supply is stopped, the gap can be automatically closed by the rebound force of the spring 8, thereby preventing the gas from flowing back, avoiding the blockage of the gas supply nozzle, and ensuring the smoothness of gas delivery.

[0030] refer to Figure 1 、 Figure 2 Both ends of the connecting pipe 1 are welded with a first flange 12, and the two ends of the connecting pipe 1 are bolted to the main conveying pipe 2 through the first flange 12. The first flange 12 can be used to install the connecting pipe 1 on the main conveying pipe 2, and it is also convenient for disassembly and maintenance.

[0031] refer to Figure 2 , a sealing ring 13 is bonded between the connecting pipe 1 and the main delivery pipe 2. Improve the sealing performance of the connecting pipe 1 and the main delivery pipe 2 after installation to prevent gas leakage.

[0032] A brief description of the usage process: The connecting pipe 1 is installed at a location in the center section of the main delivery pipe 2 where pneumatic delivery is relatively weak, and then connected to the compressed air pump through the air supply pipe 3, so that the compressed air pump can supply air to the inside of the connecting pipe 1 through the air supply pipe 3 and the L-shaped pipe 4. After that, the gas pressure overcomes the elastic force of the spring 8 and pushes the conical slide 7 to slide inside the L-shaped pipe 4 toward the side away from the air supply pipe 3, so that a gap can be created between the conical slide 7 and the L-shaped pipe 4, and the supplementary compressed air can enter the connecting pipe 1 through this gap to replenish the air. At the same time, after the air supply pipe 3 stops supplying air, the conical slide 7 uses the elastic force of the spring 8 to drive the sliding rod 6 to slide back inside the bracket 5, so that the conical slide 7 is re-fitted with the inner wall of the L-shaped pipe 4, so that the inner wall of the L-shaped pipe 4 is sealed and the gas cannot flow. As a result, the compressed gas and powdered solids inside the connecting pipe 1 will not flow back into the L-shaped pipe 4.

[0033] Example 2:

[0034] refer to Figure 1 、 Figure 2 A pneumatic conveying air supply nozzle is provided. A fixed rod 9 is provided at the end of the L-shaped pipe 4 away from the air supply pipe 3. The surface of the fixed rod 9 is fixedly sleeved with an auger blade 10 fixedly connected to the inner wall of the L-shaped pipe 4. The end of the fixed rod 9 away from the air supply pipe 3 is rotatably connected to the stirring blade 11. The compressed air flows in a spiral shape inside the L-shaped pipe 4, so that it can quickly merge with the original compressed air and powdered solids. At the same time, the gas drives the stirring blade 11 to stir the powdered solids, thereby preventing the powdered solids from accumulating inside the connecting pipe 1 and improving the efficiency of pneumatic conveying.

[0035] refer to Figure 2 The end of the sliding rod 6 away from the conical slide 7 is fixedly connected to the arc block 14 which is engaged with the end of the spring 8 away from the bracket 5. It is convenient to guide the gas to both sides and reduce the resistance of the gas to the arc block 14.

[0036] refer to Figure 2 The surface of the tapered slide 7 is fixedly sleeved with a sealing pad 15 that is slidably connected to the inner wall of the L-shaped pipe 4. The sealing performance of the tapered slide 7 and the tapered groove section of the arc block 14 is improved to prevent gas from flowing back.

[0037] refer to Figure 1 、 Figure 2 The top of the air supply pipe 3 is fixedly connected with a second flange 16. It is convenient for the air supply pipe 3 to be sealed and connected with the output end of the compressed air pump for air supply to ensure air tightness.

[0038] A brief description of the usage process: After the compressed air overcomes the elastic force of the spring 8, it enters the L-shaped pipe 4 through the gap between the conical slide 7 and the L-shaped pipe 4. The compressed air is then guided by the auger blades 10, causing the compressed air to flow in a spiral shape inside the L-shaped pipe 4. After the compressed air is output from the L-shaped pipe 4, it can quickly merge with the original compressed air and powdered solids inside the connecting pipe 1 and the main conveying pipe 2, thereby improving the gas conveying force. At the same time, during the flow of gas, the stirring blades 11 are driven to rotate inside the connecting pipe 1, so that the stirring blades 11 can stir the compressed air and powdered solids, thereby stirring the powdered solids and preventing them from accumulating inside the connecting pipe 1, so that the compressed air can drive the powdered solids to be conveyed quickly.

[0039] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An air supply nozzle for pneumatic conveying, comprising a connecting pipe (1), characterized in that: The two ends of the connecting pipe (1) are connected to the main delivery pipe (2), one side of the top of the connecting pipe (1) is fixedly connected to the air supply pipe (3), the bottom of the air supply pipe (3) is fixedly connected to the L-shaped pipe (4) connected to the inside of the connecting pipe (1), a conical groove is provided inside the L-shaped pipe (4), a bracket (5) is fixedly connected to the inside of the L-shaped pipe (4), a sliding rod (6) is slidably connected to the inside of the bracket (5), one end of the sliding rod (6) in the conical groove inside the L-shaped pipe (4) is fixedly connected to the same conical slide (7), and the surface of the sliding rod (6) away from the conical slide (7) is slidably sleeved with a spring (8) fixedly connected to the bracket (5).

2. The air supply nozzle for pneumatic conveying according to claim 1, characterized in that: A fixing rod (9) is provided at one end of the L-shaped pipe (4) away from the air supply pipe (3), and an auger blade (10) fixedly connected to the inner wall of the L-shaped pipe (4) is fixedly sleeved on the surface of the fixing rod (9). An agitating blade (11) is rotatably connected to the other end of the fixing rod (9) away from the air supply pipe (3).

3. The air supply nozzle for pneumatic conveying according to claim 1, characterized in that: Both ends of the connecting pipe (1) are welded with first flanges (12), and the two ends of the connecting pipe (1) are bolted to the main delivery pipe (2) via the first flanges (12).

4. The air supply nozzle for pneumatic conveying according to claim 1, characterized in that: A sealing ring (13) is bonded between the connecting pipe (1) and the main delivery pipe (2).

5. The air supply nozzle for pneumatic conveying according to claim 1, characterized in that: The end of the sliding rod (6) away from the conical slide plate (7) is fixedly connected to an arc block (14) which is clamped with the end of the spring (8) away from the bracket (5).

6. The air supply nozzle for pneumatic conveying according to claim 1, characterized in that: A sealing gasket (15) is fixedly sleeved on the surface of the conical slide plate (7) and is slidably connected to the inner wall of the L-shaped pipe (4).

7. The air supply nozzle for pneumatic conveying according to claim 1, characterized in that: A second flange (16) is fixedly connected to the top of the air supply pipeline (3).

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