CN217996033U

CN217996033U - Pneumatic conveying sending section and pneumatic conveying device

Info

Publication number: CN217996033U
Application number: CN202221415887.7U
Authority: CN
Inventors: 甄叶; 王欢; 郎鹏德; 郎秀荣; 许洪臣; 赵英; 刘德勇; 宋任宇
Original assignee: Anhui Lantian Yingfeng Environmental Protection Technology Co ltd
Current assignee: Anhui Lantian Yingfeng Environmental Protection Technology Co ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-12-09
Anticipated expiration: 2032-06-08

Abstract

The utility model belongs to the technical field of material conveying devices, and relates to a pneumatic conveying sending section and a pneumatic conveying device; the sending section comprises a cavity, and a feeding hole is formed in the top of the cavity; one side of the cavity is connected with a conveying gas source through a gas inlet pipe, the other side of the cavity is connected with a discharging pipe, and the gas inlet pipe and the discharging pipe are located on the same plane; a bell mouth is arranged at the joint of the discharge pipe and the cavity; the bell mouth is gradually reduced from the cavity side to the discharge pipe side; a sealing bottom plate is arranged at the bottom of the cavity; the sealing bottom plate is positioned below the lower edges of the air inlet pipe and the discharge pipe; the utility model discloses send the fluidization space increase of festival, pass through the horn mouth enlarged cross-section in the exit, make the velocity of flow reduce, solved the problem of the wearing and tearing of sending festival discharge gate department.

Description

Pneumatic conveying sending section and pneumatic conveying device

Technical Field

The utility model belongs to the technical field of material conveying device, concretely relates to pneumatic conveying sends festival and pneumatic conveying device.

Background

The pneumatic conveying is an important link of clean production, replaces the traditional mechanical material conveying process with a sealed conveying pipeline, and is a modern logistics system suitable for conveying bulk materials (fly ash, grain and cement). Will replace the traditional various mechanical transports with great advantage. The dense-phase pneumatic conveying is to use compressed air as power, utilize an air source to convey materials, and convey the materials to a specified place through a transmitter, a valve and a sealed pipeline. The system mainly comprises the following parts: the system comprises an air source system (an air compressor), a transmitter system, a conveying pipeline, a storage system and a control system (an electromagnetic valve control box, a PLC control box, a touch screen and a remote control system).

The pneumatic conveying is realized by transferring the pressure of compressed air to the material in the conveying process and converting the pressure of the compressed air into the kinetic energy of the material. The working principle of the pressure feed type material conveying system is as follows (as shown in figure 1): (1) The material enters the transmitter 1 through the upper feed port, and when the material in the transmitter 1 reaches the material height detected by the material level gauge, the feed valve is closed, and the feeding is stopped; (2) Opening a valve for controlling a fluidizing gas source, and closing the valve when the valve is pressurized all the time to enable the pressure to reach a set pressure (determined according to the characteristics of the materials), wherein the set pressure is needed to enable the materials in the transmitter to reach a fluidizing state; (3) At this time, the discharge valve 5 on the pipeline is opened, and simultaneously, the valve for controlling the conveying air source is opened, so that the materials are conveyed to the equipment at the appointed place. And the whole system also needs a pressure transmitter 2 and an air supplement device 4 to measure pressure and deliver air supplement.

In the whole material conveying process, the design and the type selection of the lower sending section 3 of the sender 1 are very important, and the fluidization state and the conveying effect of the materials are directly related. The structure of the existing sending joint 3 is shown in fig. 2, namely, a feed inlet 31 of the sending joint 3 is connected with a flange of a sender, a conveying gas source enters the sending joint 3 from an inlet of a gas inlet pipe 32, materials are sent out from a pipe orifice of a material outlet pipe 33, a circular sealing middle partition plate 6 is connected to the bottoms of the gas inlet pipe 32 and the material outlet pipe 33, a sealed cavity is formed by the circular sealing middle partition plate 6, and fluidizing gas enters the sender through a fluidizing gas inlet to fluidize the materials. However, in this process, because the discharge port connected to the discharge pipe 33 and the sending node 3 has a small cross section, the speed is rapidly increased under the action of the conveying gas source, and abrasion occurs to different degrees at the corner of the discharge port (e.g. at the position of the point e in the figure), thereby affecting the material conveying.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes prior art's is not enough, provides a pneumatic conveying sends festival and pneumatic conveyor, solves the problem that wearing and tearing easily appear in the material exit of sending festival.

In order to achieve the above purpose, the present invention is achieved by the following technical solutions.

A pneumatic transmission sending section comprises a cavity, wherein a feeding hole is formed in the top of the cavity; one side of the cavity is connected with a conveying air source through an air inlet pipe, the other side of the cavity is connected with a discharging pipe, and the air inlet pipe and the discharging pipe are located on the same plane; a bell mouth is arranged at the joint of the discharge pipe and the cavity; the bell mouth is gradually reduced from the cavity side to the discharge pipe side; a sealing bottom plate is arranged at the bottom of the cavity; the sealing bottom plate is positioned below the lower edges of the air inlet pipe and the discharge pipe.

Further, a liquefied gas source inlet is formed in the side wall of the cavity; the liquefied gas source inlet is connected with a fluidizing gas connecting pipe, and the included angle between the fluidizing gas connecting pipe and the central axis of the gas inlet pipe is beta; beta is more than 30 degrees and less than 60 degrees.

Further, the sealing bottom plate is of a circular structure.

Furthermore, the feed inlet is connected to the bottom of the transmitter through a flange.

The pneumatic conveying device is provided with the pneumatic conveying sending section, and the air inlet pipe is connected with a conveying air source through a flange; and a pressure transmitter is arranged between the air inlet pipe and the conveying air source.

Further, the discharging pipe is connected with a material storage device, and the discharging pipe is provided with an air supply device and a discharging valve.

The utility model discloses produced beneficial effect for prior art does:

1. the fluidization space of the sending section of the utility model is increased, and the section is enlarged through the bell mouth at the outlet, so that the flow velocity is reduced, and the abrasion problem at the outlet of the sending section is effectively solved;

2. the utility model discloses improved the current inside structure of festival that sends, removed current circular seal median septum, will send the volume increase of sending the chamber in the festival, in the twinkling of an eye of opening bleeder valve and conveying air supply, make the material can carry along the discharge gate in order.

Drawings

Fig. 1 is a schematic structural diagram of a conventional pressure-feed material conveying system.

Fig. 2 is a sectional view of a sending node in a conventional pressure feed material conveying system.

Fig. 3 is a cross-sectional view of the delivery segment of the present invention.

Fig. 4 is a top view of fig. 3.

In the figure, 1-a transmitter, 2-a pressure transmitter, 3-a transmitting section, 4-an air supply device, 5-a discharge valve and 6-a circular sealing middle clapboard;

31-a feed inlet, 32-an air inlet pipe, 33-a discharge pipe, 34-an air connecting pipe for fluidization, 35-a cavity, 36-a bell mouth and 37-a sealing bottom plate.

Detailed Description

In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

As shown in fig. 3 and 4, the embodiment provides a pneumatic transmission sending node, the sending node 3 includes a cavity 35, and the top of the cavity 35 is provided with a feeding hole 31; one side of the cavity 35 is connected with a conveying gas source through a gas inlet pipe 32, the other side of the cavity is connected with a discharge pipe 33, and the gas inlet pipe 32 and the discharge pipe 33 are located on the same plane; a bell mouth 36 is arranged at the joint of the discharge pipe 33 and the cavity 35; the bell mouth 36 is gradually reduced from the cavity 35 side to the discharge pipe 33 side; a circular sealing bottom plate 37 is arranged at the bottom of the cavity 35; the sealing bottom plate 37 is located below the lower edges of the inlet pipe 32 and the outlet pipe 33.

A liquefied gas source inlet is formed in the side wall of the cavity 35; the inlet of the liquefied gas source is connected with a fluidizing gas connecting pipe 34, and the included angle between the fluidizing gas connecting pipe 34 and the central axis of the gas inlet pipe 32 is 45 degrees.

As shown in fig. 1, the feed port 31 is flanged to the bottom of the transmitter 1. The pneumatic conveying device is provided with the sending joint 3, and the air inlet pipe 32 is connected with a conveying air source through a flange; a pressure transmitter 2 is arranged between the inlet pipe 32 and the conveying gas source. The discharging pipe 33 is connected with a material storage device, and the discharging pipe 33 is provided with an air supplementing device 4 and a discharging valve 5.

The design principle of the transmitting node 3 in this embodiment is as follows:

1. according to the following formula

v=Q/A A=πd ² /4

Wherein v is the material flow velocity, Q is the pipeline volume flow, A is the cross-sectional area, and d is the radius of the conveying pipeline;

through this structure of installation horn mouth 36 at material exit for the cross-section increases, and under the certain circumstances of unit interval delivery capacity, the velocity of flow that the material was located through this cross-section reduces, thereby makes the disturbance of material to the horn mouth reduce, has alleviateed the wearing and tearing of material to the discharge gate.

Through removing current circular sealed median septum 6 in figure 2 for send the whole cavity volume increase of festival 3, and make conveying air supply entry and material export be in send a festival cavity middle part, through fluidization pressurized material, when opening the pipeline bleeder valve and carry the gas, the orderly entering horn mouth of material reachs the conveying line, makes the material reduce near the disturbance of sending festival discharge gate.

Through the structural design optimization of the sending section in the two aspects, the abrasion near the discharge hole of the sending section is reduced, and the material conveying is carried out in order.

The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.

Claims

1. A pneumatic transmission sending section comprises a cavity (35), wherein a feeding hole (31) is formed in the top of the cavity (35); one side of the cavity (35) is connected with a conveying gas source through an air inlet pipe (32), the other side of the cavity is connected with a discharge pipe (33), and the air inlet pipe (32) and the discharge pipe (33) are located on the same plane; the device is characterized in that a bell mouth (36) is arranged at the joint of the discharge pipe (33) and the cavity (35); the bell mouth (36) is gradually reduced from the cavity (35) side to the discharge pipe (33) side; a sealing bottom plate (37) is arranged at the bottom of the cavity (35); the sealing bottom plate (37) is positioned below the lower edges of the inlet pipe (32) and the outlet pipe (33).

2. A pneumatic conveying sending section according to claim 1, characterized in that the chamber (35) is provided with a liquefied gas inlet on its side wall; the inlet of the liquefied gas source is connected with a fluidizing gas connecting pipe (34), and an included angle between the fluidizing gas connecting pipe (34) and the central axis of the gas inlet pipe (32) is beta; beta is more than 30 degrees and less than 60 degrees.

3. Pneumatic transport transmission section according to claim 1, characterised in that the sealing bottom plate (37) is of circular configuration.

4. Pneumatic conveying sending section according to claim 1, characterised in that the inlet (31) is flanged to the bottom of the sender (1).

5. Pneumatic conveying device with pneumatic conveying sending section according to any of claims 1-4, characterised in that the air inlet pipe (32) is connected to the conveying air source via a flange; and a pressure transmitter (2) is arranged between the air inlet pipe (32) and the conveying air source.

6. Pneumatic conveying device with pneumatic conveying sending section according to claim 5, characterised in that the tapping pipe (33) is connected to a storage device, the tapping pipe (33) being provided with an air supply device (4) and a tapping valve (5).