CN218173908U

CN218173908U - Plastic particle concentrated phase delivery pump

Info

Publication number: CN218173908U
Application number: CN202221128950.9U
Authority: CN
Inventors: 张新年; 兰中平; 赵海葛
Original assignee: Beijing Betterclyde Engineering Technology Co ltd
Current assignee: Beijing Betterclyde Engineering Technology Co ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-12-30
Anticipated expiration: 2032-05-11

Abstract

The utility model discloses a plastic pellet dense phase delivery pump, which comprises a pump body, pipeline and gas transmission pipeline, the feed inlet department of this pump body installs the feed line, pneumatic striker valve and pneumatic feed valve are installed to this feed line top-down, the top installation charge level indicator of this pump body, this gas transmission pipeline includes the air supply pipeline, pressurization pipeline and fluidization pipeline, install pressure transmitter in the entrance of air supply pipeline, the air inlet intercommunication of this pressurization pipeline is on the air supply pipeline, the gas outlet of this pressurization pipeline and the top intercommunication of the pump body, the air inlet and the pressurization pipeline switch-on of this fluidization pipeline, the gas outlet of this fluidization pipeline and the bottom intercommunication of the pump body, the entry of the export intercommunication air supply pipeline of this air supply pipeline, the export of this air supply pipeline with pipeline intercommunication is close to pipeline's entry, the pneumatic bleeder valve of installation on this pipeline, the exit end of this pump body with connect the elbow between the entry end of pipeline.

Description

Plastic particle concentrated phase delivery pump

Technical Field

The utility model relates to a plastic particle concentrated phase delivery pump.

Background

In the production or processing process of plastic particles, the plastic particles are used as products or raw materials and need to be conveyed in a pneumatic conveying mode in many cases. Because the plastic particles collide with the inner wall of the pipeline or among the particles when moving at high speed in the pipeline, a large amount of fine powder is generated, and the fine powder not only influences the processability of the plastic particles, but also brings a plurality of problems and treatment cost to the downstream production process. In order to reduce the generation amount of fine powder, a rotary valve concentrated phase pneumatic conveying mode is mostly adopted at present. However, the rotary valve dense phase conveying mode has the following problems: 1) The conveying distance is short, and is generally not more than 200 meters; 2) Due to the structural characteristics of the rotary valve, conveying gas inevitably leaks to an upstream system, and the larger the conveying pressure is, the larger the gas leakage is, so that the loss of compressed gas is increased, the operation cost is increased, and the material blanking is prevented from reducing the filling rate of the rotary valve; in some production processes, the system pressure of upstream equipment can be disturbed, so that the normal operation of the upstream equipment is influenced; 3) The air leakage is likely to increase due to abrasion caused by long-time operation of the rotary valve and change of conveying pressure, so that stable operation of a conveying system is affected, and even pipe blockage occurs; 4) The structural characteristics of the rotary valve determine that plastic particles are necessarily cut to a certain degree and damaged; 5) The rotary valve is a rotating device, so that the failure rate is high; 6) The manufacturing technical requirements of the rotary valve are high, and the rotary valve needs to be provided by a professional supplier and maintained; 7) Rotary valves are expensive as core equipment, and not only are large early investment and high later maintenance cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve above-mentioned technical problem and provide a plastic pellet dense phase delivery pump, it is stable, carry the plastic pellet reliably.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a plastic pellet dense phase delivery pump, which comprises a pump body, conveying line and gas transmission pipeline, the feed inlet department of this pump body installs the feed line, pneumatic material stop valve and pneumatic feed valve are installed to this feed line top-down, the top installation charge level indicator of this pump body, this gas transmission pipeline includes the air supply pipeline, the air supplement pipeline, pressurization pipeline and fluidization pipeline, install pressure transmitter at the entrance of air supply pipeline, the air inlet intercommunication of this pressurization pipeline is on the air supply pipeline, the gas outlet of this pressurization pipeline and the top intercommunication of the pump body, the air inlet and the pressurization pipeline switch-on of this fluidization pipeline, the gas outlet of this fluidization pipeline and the bottom intercommunication of the pump body, the export intercommunication air supplement pipeline's of this air supply pipeline entry, the export of this air supplement pipeline with conveying line intercommunication is close to conveying line's entry, the pneumatic bleeder valve of installation on this conveying line, the exit end of this pump body with connect the elbow between the entry end of conveying line.

And a pneumatic air supplementing valve is arranged near the outlet of the air supplementing pipeline, a pneumatic pressurizing valve is arranged on the pressurizing pipeline, and a fluidizing component is arranged on the fluidizing pipeline.

And a flexible joint is arranged between the pneumatic material blocking valve and the pneumatic feeding valve of the feeding pipeline.

The utility model has the advantages that: the utility model provides a dense phase of rotary valve transport cost height, unstability, transport distance a series of not enough such as short, realized plastic pellet's dense phase and carried, because the conveying speed that dense phase carried is low, avoided because of particle and pipe wall between, particle and particle between high-speed collision cause the production of farine, the transportation process is high-efficient simultaneously, stable, reliable, greatly reduced earlier stage investment cost, later maintenance cost, economic environmental protection, energy saving and emission reduction.

Drawings

In order to more clearly illustrate the embodiments of the present invention, the embodiments will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The following description is given by way of example only, and not by way of limitation, of the scope of the invention.

As shown in fig. 1, the utility model discloses a plastic particle dense phase delivery pump, which comprises a pump body 1, a delivery pipeline and a gas delivery pipeline 3. A feeding pipeline is arranged at a feeding port of the pump body 1, a pneumatic material stop valve 11 and a pneumatic feeding valve 12 are arranged on the feeding pipeline from top to bottom, and a flexible joint 13 is arranged between the pneumatic material stop valve and the pneumatic feeding valve; a level gauge 14 is mounted on the top of the pump body 1. The gas transmission pipeline comprises a gas source pipeline 21, a pressurizing pipeline 22, a fluidizing pipeline 23 and a gas supplementing pipeline 24, wherein the inlet of the gas source pipeline is connected with a Roots blower, and the gas quantity of the Roots blower is fixed; a pressure transmitter 211 is installed near the inlet of the gas source pipeline 21 and used for monitoring the conveying pressure during conveying; the air inlet of the pressurization pipeline 22 is communicated with the air source pipeline 21, the air outlet of the pressurization pipeline 22 is communicated with the top of the pump body 1, a pneumatic pressurization valve 221 is arranged on the pressurization pipeline 22 and used for controlling the on-off of the pressurization pipeline 22, and the purpose of pressurization is to enable materials in the pump body to smoothly come out; the air inlet of the fluidization pipeline 23 is communicated with the pressurization pipeline 22, the air outlet of the fluidization pipeline 23 is communicated with the bottom of the pump body 1, the fluidization component 231 is arranged on the fluidization pipeline, and fluidization is realized by preventing materials from being stuck or bridged, so that the auxiliary discharging effect is realized; the outlet of the air source pipeline 21 is communicated with the inlet of the air supplement pipeline 24, and a pneumatic air supplement valve 241 is arranged near the outlet of the air supplement pipeline 24 and used for controlling the on-off of the air supplement pipeline 24; the air supplement function is to adjust the solid-gas ratio, the solid-gas ratio is the mass ratio of solid to gas in pneumatic transmission, and the solid-gas ratio is large, so that the pipeline is easy to block and the transmission is not carried away when the solid-gas ratio is large; if the solid-gas ratio is low, the gas is excessive, the gas is wasted, and the plastic particles are abraded due to too high conveying speed. Therefore, the solid-gas ratio is preferably controlled to be between 15 and 30; the outlet of the air supplement pipeline is communicated with the conveying pipeline and is close to the inlet of the conveying pipeline, and a pneumatic discharge valve 31 is arranged on the conveying pipeline 3; a lower elbow 15 is connected between the outlet end of the pump body 1 and the inlet end of the conveying pipeline 3.

The larger the proportion of pressurization and fluidization is, the smaller the proportion of air supplement is, the larger the solid-gas ratio can be, the smaller the gas quantity to be conveyed is, the smaller the conveying speed is, the smaller the wear to the equipment pipeline is, and the pressurization quantity is: air supplement amount: the ratio of the fluidization amounts is approximately 15. The utility model discloses in through the proportion of selecting for use the pipeline of not using thickness in order to reach the control tolerance.

The pneumatic material stop valve 11 is used for protecting the pneumatic feeding valve 12 installed below, so that abrasion of the valve core caused by material carrying operation of the pneumatic feeding valve 12 is avoided, and meanwhile, the pneumatic feeding valve 12 is prevented from being closed untight due to the fact that the valve core clamps material particles. The pneumatic feeding valve 12 is used for sealing the feeding port of the conveying pump in the conveying process, and compressed gas in the pump is prevented from leaking. The sequence of operation should be: when the conveying pump starts to charge, the pneumatic feed valve 12 is firstly opened, then the pneumatic stop valve 11 is opened, and after the conveying pump is full, the pneumatic stop valve 11 is firstly closed, and then the pneumatic feed valve 12 is closed. The flexible joint 2 is used for facilitating the disassembly and assembly of the pneumatic material stop valve 11 and the pneumatic feeding valve 12 during maintenance.

The pump body 1, the pneumatic discharge valve 31 and the level gauge 14 are common components in the art and will not be described in detail. The fluidizing assembly 231 is mainly composed of a check valve, etc., which are common components in the art and will not be described in detail herein.

The utility model discloses a working process does:

the operator starts through electrically controlled device the utility model discloses pneumatic conveyor, then pneumatic feed valve, pneumatic material stopping valve are controlled by electrically controlled device and are opened in proper order, and plastic pellet discharges from the upstream equipment and lean on self gravity to get into in the pump body.

After a level indicator installed on the pump body detects that plastic particles in the pump body are full, the pneumatic stop valve is closed, after several seconds, the plastic particles in a pipeline between the pneumatic stop valve and the pneumatic feed valve all fall into the pump body, the pneumatic feed valve is closed, and the pneumatic discharge valve is opened. Then, the pneumatic pressure valve and the pneumatic air compensating valve are opened in sequence, so that air enters the pump body and the conveying pipeline to realize the functions of pressurization, fluidization and air compensation, and then plastic particles start to be discharged from the pump body under the pushing of air flow and are conveyed out through the conveying pipeline. At which time the pressure transmitter indicates that the delivery pressure will rise and remain substantially at a certain value.

When the conveying pressure is detected to be reduced to a set value through the pressure transmitter, which indicates that the conveying of the plastic particles in the pump body 1 is finished, the pneumatic pressurizing valve and the pneumatic gas supplementing valve are closed, the conveying of the gas is stopped, and the conveying cycle is ended. The above process is repeated for the next delivery cycle.

Claims

1. The utility model provides a plastic pellet dense phase delivery pump, a serial communication port, including the pump body, conveying line and gas transmission pipeline, the feed inlet department of this pump body installs feed line, pneumatic material stop valve and pneumatic feed valve are installed to this feed line top-down, the top installation charge level indicator of this pump body, this gas transmission pipeline includes the air supply pipeline, the air supplement pipeline, pressurization pipeline and fluidization pipeline, install pressure transmitter at the entrance of air supply pipeline, the air inlet intercommunication of this pressurization pipeline is on the air supply pipeline, the gas outlet of this pressurization pipeline and the top intercommunication of the pump body, the air inlet and the pressurization pipeline switch-on of this fluidization pipeline, the gas outlet of this fluidization pipeline and the bottom intercommunication of the pump body, the entry of this air supply pipeline, the export of this air supplement pipeline with conveying line intercommunication is close to conveying line's entry, the pneumatic bleeder valve of installation on this conveying line, the exit end of this pump body with connect the elbow between the entry end of conveying line.

2. The plastic particle concentrated phase delivery pump of claim 1, characterized in that: and a pneumatic air supply valve is arranged near the outlet of the air supply pipeline, a pneumatic pressurizing valve is arranged on the pressurizing pipeline, and a fluidizing component is arranged on the fluidizing pipeline.

3. The plastic particle concentrated phase delivery pump of claim 1, characterized in that: and a flexible joint is arranged between the pneumatic material blocking valve and the pneumatic feeding valve of the feeding pipeline.