Dense-phase positive-pressure pneumatic conveyor device

Abstract

The utility model relates to a dense-phase positive-pressure pneumatic conveyor device which comprises a buffer stock bin, a manual gate valve, a pneumatic gate valve, a particle storage tank, an electromagnetic valve A, a pressure reducing valve, an electromagnetic valve B, an electric contact pressure gauge, a pneumatic ball valve, a PLC (Programmable Logic Controller) control system and a finished product stock bin, a manual gate valve and a pneumatic gate valve which are used for discharging nylon particles are arranged between the buffer bin and the particle storage tank; the electromagnetic valve A, the pressure reducing valve and the electromagnetic valve B are arranged on the particle storage tank in series, and the particle storage tank is connected with the finished product bin through the pneumatic ball valve. The nylon 66 particle conveying device is reasonable in structure and ingenious in design, solves the problems that a conveying pipeline is blocked, nylon 66 particles cannot be normally conveyed to a finished product bin and normal production is affected due to the fact that a silica gel pad is prone to being damaged and leaking air in the nylon 66 particle conveying process, can achieve remote automatic control of starting and stopping, is convenient to use, and improves production efficiency compared with the prior art. Good market prospects and development space are realized.

Description

Technical Field

[0001] This utility model relates to the field of continuous polymerization production and conveying technology of nylon 66, and specifically to a dense phase positive pressure pneumatic conveyor device. Background Technology

[0002] Dense-phase positive pressure pneumatic conveyors are devices that use low-pressure airflow to transport powdery or granular materials in pipelines. They are widely used in industries such as chemical, food, pharmaceutical, and building materials. Currently, they are widely used in the field of continuous polymerization production and conveying technology for nylon 66.

[0003] The continuous polymerization production unit for nylon 66 uses a 50% nylon 66 salt solution, which undergoes processes such as concentration, pressurization, depressurization, atmospheric pressure, and negative pressure to polymerize into nylon 66 melt. The melt is then cast into uniform strips by a casting head, and subsequently pelletized by a pelletizer to produce nylon 66 granules. These granules are conveyed to different silos by conveyors, and finally sent to the finished product silo. From there, they are packaged into various sizes for downstream customers. Previously, the conveyors used a rotary cup valve structure sealed with silicone gaskets. However, this method frequently encountered problems; the silicone gaskets were prone to breakage and leakage, causing blockages in the conveying pipelines and preventing the nylon 66 granules from being properly conveyed to the finished product silo, thus disrupting normal production.

[0004] The current problem to be solved is how to design a dense phase positive pressure pneumatic conveyor device that is structurally sound, ingeniously designed, can safely and reliably transport nylon 66 granules, reduce the failure rate during use, and ensure normal product delivery. Utility Model Content

[0005] To address the technical problems existing in the continuous polymerization production and conveying process of nylon 66, such as easy breakage and air leakage of silicone pads causing blockage of conveying pipelines and preventing particles from being properly conveyed to the finished product silo, thus affecting normal production, this utility model provides a dense phase positive pressure pneumatic conveyor device. This device achieves a reasonable structure and ingenious design, enabling safe and reliable conveying of nylon 66 particles, while reducing the failure rate during use and ensuring normal product conveying.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a dense phase positive pressure pneumatic conveyor device, including a buffer silo, a manual slide gate valve, a pneumatic slide gate valve, a granule storage tank, a solenoid valve A, a pressure reducing valve, a solenoid valve B, an electrical contact pressure gauge, a pneumatic ball valve, a PLC control system, and a finished product silo. The buffer silo is located above the granule storage tank. A manual slide gate valve and a pneumatic slide gate valve for discharging nylon granules are provided between the buffer silo and the granule storage tank. Solenoid valve A, the pressure reducing valve, and solenoid valve B are connected in series on the granule storage tank. The granule storage tank is connected to the finished product silo through the pneumatic ball valve.

[0007] The above is the basic implementation of this utility model. Further improvements, refinements and limitations can be made on the basis of the above: as described, the PLC control system controls the on / off of solenoid valve A, pressure reducing valve, solenoid valve B, electric contact pressure gauge and pneumatic ball valve respectively.

[0008] The above is the basic implementation of this utility model. Further improvements, refinements and limitations can be made on the basis of the above: For example, the electric contact pressure gauge includes a setting needle and a moving needle, wherein the setting needle is in a stationary state, and the moving needle changes with the change of pressure.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] This utility model includes a buffer silo, a manual slide gate valve, a pneumatic slide gate valve, a granule storage tank, a solenoid valve A, a pressure reducing valve, a solenoid valve B, an electrical contact pressure gauge, a pneumatic ball valve, a PLC control system, and a finished product silo. This utility model replaces the previous silicone gasket-sealed rotary cup valve structure with a pneumatic slide gate valve to achieve continuous and stable system operation. It solves the technical problems of system leakage causing pipe blockage, easy breakage of the silicone gasket seal leading to contamination of nylon 66 products and causing quality accidents, and increased manual unblocking costs and nylon 66 granule waste due to leakage causing pipe blockage.

[0011] The pneumatic slide gate valve operates smoothly and has a good sealing effect, ensuring the system's airtightness. Long-term use will not cause foreign matter to mix into the product, eliminating pipeline blockage and reducing maintenance and dredging costs and scrap rate.

[0012] This utility model has a reasonable structure and ingenious design. It not only solves the problem of easy breakage and air leakage of silicone pads in the conveying of nylon 66 granules, which causes blockage of the conveying pipeline and prevents nylon 66 granules from being properly conveyed to the finished product silo, thus affecting normal production, but also realizes remote automatic control for start and stop. It is easy to use and has a good market prospect and development space compared with the existing technology. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] The markings in the diagram are: 1. Buffer silo, 2. Manual slide gate valve, 3. Pneumatic slide gate valve, 4. Particle storage tank, 5. Solenoid valve A, 6. Pressure reducing valve, 7. Solenoid valve B, 8. Electrical contact pressure gauge, 9. Pneumatic ball valve, 10. PLC control system, 11. Finished product silo. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0016] As shown in the figure, a dense phase positive pressure pneumatic conveyor device includes a buffer silo 1, a manual slide gate valve 2, a pneumatic slide gate valve 3, a granule storage tank 4, a solenoid valve A5, a pressure reducing valve 6, a solenoid valve B7, an electrical contact pressure gauge 8, a pneumatic ball valve 9, a PLC control system 10, and a finished product silo 11. The buffer silo 1 is located above the granule storage tank 4. The manual slide gate valve 2 and the pneumatic slide gate valve 3 for discharging nylon granules are installed between the buffer silo 1 and the granule storage tank 4. The solenoid valve A5, the pressure reducing valve 6, and the solenoid valve B7 are connected in series on the granule storage tank 4. The granule storage tank 4 is connected to the finished product silo 11 through the pneumatic ball valve 9.

[0017] The above is the basic implementation of this utility model. Further improvements, refinements and limitations can be made on the basis of the above: as described, the PLC control system 10 controls the on / off of solenoid valve A5, pressure reducing valve 6, solenoid valve B7, electric contact pressure gauge 8, and pneumatic ball valve 9 respectively.

[0018] The above is the basic implementation of this utility model. Further improvements, refinements and limitations can be made on the basis of the above: For example, the electric contact pressure gauge 8 includes a setting needle and a moving needle, wherein the setting needle is in a stationary state, and the moving needle changes with the change of pressure.

[0019] As shown in the figure, the actual use process of this utility model is as follows:

[0020] During normal operation, the nylon 66 granules to be conveyed are first stored in the buffer silo 1. The worker opens the manual slide gate valve 2 in advance, and opens the pneumatic slide gate valve 3 according to the internal setting of the PLC control system 10 (at this time, solenoid valves A5, B7, and 9 are all closed). The nylon 66 granules fall naturally into the granule storage tank 4 by gravity. The closing time of the pneumatic slide gate valve 3 is controlled by the set time, thereby controlling the feeding amount. After the set time, the pneumatic slide gate valve 3 automatically closes. Solenoid valves A5, B7, and 9 open simultaneously to supply air at low pressure (2-3 kg / m³). 2 Gas propels the nylon 66 granules inside the granule storage tank 4 through the pipeline to the finished product silo 11. The conveying stop time is controlled by the two needles of the electric contact pressure gauge 8. One needle is set and does not move. During conveying, the other needle will rise as the pressure increases. When the nylon 66 granules inside the granule storage tank 4 and the pipeline are emptied, the moving pressure needle will drop below the set needle. At this time, the solenoid valves A5 and B7 and the pneumatic ball valve 9 will close simultaneously, and one feeding and conveying cycle will end. The next cycle will start according to the internal program setting of the PLC control system 10. In this way, the nylon 66 granules will be continuously delivered to the finished product silo 11.

[0021] The conveying system can be remotely started and stopped, making it easy for personnel to operate.

[0022] In practical applications, to prevent equipment damage caused by excessive system pressure, a small safety valve can be added to the pellet storage tank 4 for system pressure relief and equipment protection.

[0023] This utility model has a reasonable structure and ingenious design, which can solve the air leakage problem of existing nylon 66 particle conveying systems. Currently, the system operates smoothly, has a good sealing effect, ensures the airtightness of the conveying system, and will not produce foreign matter mixed into the product during long-term use. It eliminates pipeline blockage, reduces maintenance and dredging costs and scrap rate, and provides technical support for cost reduction and efficiency improvement of production equipment and green and environmentally friendly production. Compared with existing technologies, it has a good market prospect and development space.

[0024] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the concept of the present invention.

Claims

1. A dense-phase positive pressure pneumatic conveyor device, characterized in that: The system includes a buffer silo (1), a manual slide gate valve (2), a pneumatic slide gate valve (3), a pellet storage tank (4), a solenoid valve A (5), a pressure reducing valve (6), a solenoid valve B (7), an electric contact pressure gauge (8), a pneumatic ball valve (9), a PLC control system (10), and a finished product silo (11). The buffer silo (1) is located above the pellet storage tank (4). A manual slide gate valve (2) and a pneumatic slide gate valve (3) for discharging nylon pellets are installed between the buffer silo (1) and the pellet storage tank (4). The solenoid valve A (5), the pressure reducing valve (6), and the solenoid valve B (7) are connected in series on the pellet storage tank (4). The pellet storage tank (4) is connected to the finished product silo (11) through the pneumatic ball valve (9).

2. The dense-phase positive pressure pneumatic conveyor device as described in claim 1, characterized in that: The PLC control system (10) controls the on / off states of solenoid valve A (5), pressure reducing valve (6), solenoid valve B (7), electric contact pressure gauge (8), and pneumatic ball valve (9), respectively.

3. The dense-phase positive pressure pneumatic conveyor device as described in claim 1, characterized in that: The electrical contact pressure gauge (8) includes a setting needle and a moving needle, wherein the setting needle is stationary and the moving needle changes with the pressure.

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