An expanded perlite particle low-damage pneumatic conveying device

Abstract

The utility model provides a kind of low breakage pneumatic conveying equipment of expanded perlite particle, which is conveyed by gas, without mechanical equipment conveying, reducing the breakage of material by mechanical equipment operation. It comprises: a receiving hopper connected to the material outlet at the bottom of the starting silo; a conveying pipeline, the feeding interface of the conveying pipeline is connected to the discharge port of the receiving hopper by sealing; a negative pressure buffer bin is installed at the top of the terminal silo, and a negative pressure combination bin is installed at the top of the negative pressure buffer bin; the inner of the downcomer has a material channel and a downcomer opening at the lower end connected to the material channel, and the material channel of the downcomer is connected to the output end of the conveying pipeline; a first pneumatic valve and a second pneumatic valve, the first pneumatic valve is installed on the discharge channel at the bottom of the negative pressure combination bin, and the second pneumatic valve is installed on the discharge channel at the bottom of the negative pressure buffer bin; a negative pressure generating device is connected to the top of the negative pressure combination bin through a gas pipeline to provide negative pressure in the negative pressure combination bin.

Description

Technical Field

[0001] This utility model relates to the technical field of perlite expansion equipment, and in particular to a pneumatic conveying equipment for expanding perlite particles with low breakage. Background Technology

[0002] The perlite expansion furnace is a specialized piece of equipment for producing expanded perlite. Vitrified microspheres are a type of white granular material with an internal honeycomb structure, made from perlite ore sand that has been preheated and then instantaneously calcined at high temperatures to expand.

[0003] During the production and processing of expanded perlite, it is usually necessary to transfer it between silos, such as lifting expanded perlite from the starting silo to the terminal silo at a higher level. In the existing technology, elevators are usually used for this purpose. Elevators are generally divided into spiral blade elevators and bucket elevators. With this kind of elevator structure, such as a bucket elevator, physical collision is required every time material is dug up. This will undoubtedly cause wear and tear on some of the expanded perlite, resulting in a decrease in the performance of expanded perlite. Therefore, it is an urgent problem to solve to invent a device that minimizes wear on perlite particles during the lifting and transfer process. Utility Model Content

[0004] To address the above technical problems, this utility model provides a low-damage pneumatic conveying device for expanded perlite particles, which uses pneumatics for conveying without mechanical equipment, thus reducing the damage to the material caused by mechanical equipment operation.

[0005] A low-breakage pneumatic conveying device for expanded perlite particles includes:

[0006] The receiving hopper is connected to the material outlet at the bottom of the starting silo;

[0007] The conveying pipeline has a feed port on its input end side wall, and the feed port is connected to the discharge port of the receiving hopper through a sealing connector.

[0008] The negative pressure combination silo and the negative pressure buffer silo are provided, wherein the negative pressure buffer silo is installed on top of the terminal silo and the negative pressure combination silo is installed on top of the negative pressure buffer silo.

[0009] The feeding pipe has a material channel and a feeding opening at the lower end that is connected to the material channel. The material channel of the feeding pipe is connected to the output end of the conveying pipe.

[0010] A first pneumatic valve and a second pneumatic valve, wherein the first pneumatic valve is installed on the discharge channel at the bottom of the negative pressure combined chamber, and the second pneumatic valve is installed on the discharge channel at the bottom of the negative pressure buffer chamber;

[0011] A negative pressure generating device is connected to the top of the negative pressure combination chamber via a gas pipeline to provide negative pressure inside the negative pressure combination chamber.

[0012] Furthermore, an air supply valve is installed at the input end of the delivery pipeline.

[0013] Furthermore, level gauges are installed in the starting silo, negative pressure combination silo, negative pressure buffer silo, and terminal silo.

[0014] Furthermore, the negative pressure combination chamber is equipped with a filter screen that divides it into upper and lower parts, the feed pipe is placed below the filter screen, and the negative pressure generator is connected to the negative pressure combination chamber above the filter screen.

[0015] Furthermore, a flow regulating valve is installed on the conveying pipe between the receiving hopper and the input end of the conveying pipe.

[0016] Furthermore, a filter is installed on the gas pipeline to filter out solid impurities in the gas.

[0017] The beneficial effects of this utility model are:

[0018] This invention drives the material entirely through negative pressure airflow, completely avoiding the squeezing, friction, and collision of brittle perlite particles by rotating parts in mechanical conveying equipment (such as screw conveyors and bucket elevators).

[0019] Materials fall by gravity between the combined bin and the buffer bin, further avoiding secondary mechanical damage.

[0020] The filter screen divides the combined chamber into a purification chamber and a collection chamber, ensuring efficient separation of materials and airflow and preventing dust from entering the negative pressure device. A filter installed on the gas pipeline further filters solid impurities from the gas, extending the lifespan of the negative pressure device and reducing maintenance.

[0021] The two-stage valves operate alternately (separation chamber → buffer chamber → terminal chamber), creating an airlock effect to maintain the stability of the negative pressure system and prevent air pressure fluctuations from affecting the conveying efficiency.

[0022] The flow regulating valve at the feed end can precisely control the rate at which material enters the pipeline, matching the negative pressure suction capacity to prevent pipeline blockage or material accumulation.

[0023] The air replenishment valve balances the air pressure in the pipeline, maintains a stable air-to-material mixing ratio, and reduces particle suspension or deposition.

[0024] The material level detection devices in each silo provide real-time feedback on the inventory status, which in turn controls the opening and closing of valve groups and the operation of the negative pressure system, thus achieving automated management. Attached Figure Description

[0025] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is the main structural view of the present invention;

[0027] Figure 2 This is a structural diagram of the feed tube of this utility model;

[0028] Explanation of reference numerals in the attached drawings: 1. Receiving hopper; 2. Starting material bin; 3. Conveying pipe; 4. Negative pressure combination bin; 5. Negative pressure buffer bin; 6. Terminal material bin; 7. Discharge pipe; 701. Material channel; 702. Discharge opening; 703. Feed inlet; 8. First pneumatic valve; 9. Second pneumatic valve; 10. Negative pressure generating device; 11. Gas pipeline; 12. Air replenishment valve; 13. Level gauge; 14. Filter screen; 15. Flow regulating valve; 16. Filter; 17. Vibration motor. Detailed Implementation

[0029] The following will refer to the appendix in the embodiments of this utility model. Figure 1-2 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] This utility model's negative pressure generating device 10 draws the negative pressure combination chamber 4 into a negative pressure state. The flow regulating valve 15 is adjusted to regulate the conveying volume. Material enters the negative pressure conveying pipeline 3 and then into the negative pressure combination chamber 4. Once the material in the combination chamber reaches a certain amount, the first pneumatic valve 8 is opened, and the material enters the negative pressure buffer chamber 5 by gravity. Then, the first pneumatic valve 8 is closed, and the second pneumatic valve 9 is opened, allowing the material to fall into the terminal hopper 6 by gravity. The conveying process is continuous, and the material does not pass through rotating parts, reducing the material breakage rate.

[0031] The negative pressure generating device 10 described in this utility model is a Roots blower (negative pressure type).

[0032] The negative pressure generating device 10 of this invention generates negative pressure in the upper space of the negative pressure combination chamber 4. At this time, the first pneumatic valve 8 at the bottom of the negative pressure combination chamber 4 is closed, connecting the negative pressure combination chamber 4, the conveying pipe 3, and the bottom outlet of the starting material hopper 2. During the negative pressure process, air enters from the input end of the conveying pipe 3. An air replenishment valve 12 is installed at the input end of the conveying pipe 3 to balance the air pressure inside the pipe. A flow regulating valve 15 is installed on the conveying pipe 3 between the receiving hopper 1 and the air replenishment valve 12. The flow regulating valve 15 can be used to adjust the flow rate of the pneumatic push to match the negative pressure of the negative pressure generating device 10, thereby preventing pipe blockage or material accumulation. During the negative pressure generation process, the valve at the bottom of the starting material hopper 2 is opened, and the material outlet at the bottom of the starting material hopper 2 is connected to the receiving hopper 1. Under the action of its own gravity and negative pressure suction, the material falls from the receiving hopper 1 into the conveying pipe 3. Under the action of negative pressure suction, the material is conveyed in the conveying pipe 3 towards the discharge pipe 7. Material enters the material channel 701 of the discharge pipe 7, and then falls from the discharge opening 702 at the lower end of the discharge pipe 7 into the negative pressure combination chamber 4. When the material in the negative pressure combination chamber 4 accumulates to a certain height, the first pneumatic valve 8 is opened, and the material falls into the negative pressure buffer chamber 5 under the action of gravity. At this time, the negative pressure generating device 10 can continue to operate without stopping the material conveying, forming continuous operation. Since the second pneumatic valve 9 is closed at this time, the stability of the negative pressure operation can still be guaranteed. After the material enters the negative pressure buffer chamber, the first pneumatic valve 8 is closed and the second pneumatic valve 9 is opened, unloading the material in the negative pressure buffer chamber into the lower terminal hopper 6. Since the first pneumatic valve 8 remains closed at this time, the stability of the negative pressure is still not affected. Thus, one stage of material discharge is completed, and the above process continues until the entire operation is completed. In this invention, by combining the negative pressure combined chamber 4, the negative pressure buffer chamber, the first pneumatic valve 8, and the second pneumatic valve 9, the material can be unloaded into the terminal hopper 6 without stopping the negative pressure conveying process, and the stability of the negative pressure conveying process can be guaranteed.

[0033] The conveying pipe 3 consists of a first horizontal section, a vertical section, and a second horizontal section connected thereto. The free end of the first horizontal section serves as the input end and is equipped with an air supply valve 12. A feed inlet is located at the upper end of the first horizontal section, which is connected to the lower discharge port of the receiving hopper 1. The free end of the second horizontal section is connected to the discharge pipe 7. The horizontal and vertical sections are connected by elbows. The conveying elbows use large radius elbows to reduce eddies generated in the material during conveying and lower the material breakage rate. The inner wall of the conveying pipe 3 is internally polished to minimize pipe joint gaps and ensure smoother material flow within the pipe.

[0034] As an embodiment, the feeding pipe 7 in this utility model is a circular pipe with a feeding port 703 at one end and an outwardly protruding umbrella-shaped part at the other end. The lower end near the umbrella-shaped part has a feeding opening 702, and the internal cavity of the circular pipe forms a material channel 701. The feeding port 703 is connected to the conveying pipe 3, and the material falls from the feeding opening 702.

[0035] In this invention, a horizontal filter screen 14 is provided on the upper part of the negative pressure combination chamber 4. After the material flows into the combination chamber from the conveying pipe 3 through the discharge pipe 7, the material descends and the air rises. The air flows through the filter screen 14 to filter out the solid shells in it, and then enters the gas pipe 11. After the air passes through the filter 16, it is further filtered to remove solid impurities in the gas, thus extending the life of the negative pressure device and reducing maintenance.

[0036] A vibration motor 17 is installed on the top of the negative pressure combination chamber 4. The vibration motor 17 causes the negative pressure combination chamber 4 to vibrate, which prevents the filter screen 14 and the feed pipe 7 from getting clogged, and facilitates the material to fall from the negative pressure combination chamber 4 into the negative pressure buffer chamber 5.

Claims

1. An apparatus for pneumatic conveying of expanded perlite particles with low breakage, characterized in that, include: The receiving hopper (1) is connected to the material outlet at the bottom of the starting material silo (2); The conveying pipe (3) has a feeding interface on the side wall of its input end, and the feeding interface is connected to the discharge port of the receiving hopper (1) through a sealing connector; The negative pressure combination chamber (4) and the negative pressure buffer chamber (5) are installed on top of the terminal silo (6), and the negative pressure combination chamber (4) is installed on top of the negative pressure buffer chamber (5). The feeding pipe (7) has a material channel (701) and a feeding opening (702) at the lower end connected to the material channel (701). The material channel (701) of the feeding pipe (7) is connected to the output end of the conveying pipe (3). The first pneumatic valve (8) and the second pneumatic valve (9) are installed on the discharge channel at the bottom of the negative pressure combination chamber (4) and the second pneumatic valve (9) is installed on the discharge channel at the bottom of the negative pressure buffer chamber (5). A negative pressure generating device (10) is connected to the top of the negative pressure combination chamber (4) via a gas pipe (11) to provide negative pressure to the negative pressure combination chamber (4).

2. The low breakage pneumatic conveying apparatus for expanded perlite particles according to claim 1, characterized in that, An air supply valve (12) is installed at the inlet end of the conveying pipe (3).

3. The low breakage pneumatic conveying system for expanded perlite particles according to claim 1, wherein Level gauges (13) are installed in the starting silo (2), negative pressure combination silo (4), negative pressure buffer silo (5) and terminal silo (6).

4. The pneumatic conveying equipment for expanded perlite particles with low breakage according to claim 1, characterized in that, The negative pressure combination chamber (4) is equipped with a filter screen (14) that divides it into upper and lower parts. The feed pipe (7) is placed below the filter screen (14), and the negative pressure generator is connected to the negative pressure combination chamber (4) above the filter screen (14).

5. The low breakage pneumatic conveying system for expanded perlite particles according to claim 1, wherein A flow regulating valve (15) is installed on the conveying pipe (3) between the receiving hopper (1) and the input end of the conveying pipe (3).

6. The low breakage pneumatic conveying system for expanded perlite particles according to claim 1, wherein A filter (16) is installed on the gas pipeline (11) to filter solid impurities in the gas.

7. The low breakage pneumatic conveying system for expanded perlite particles according to claim 1, wherein A vibration motor (17) is installed on the top of the negative pressure combined chamber (4).

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