CN2589420Y - Current stabilization cone pump for conveying powdery material - Google Patents

Abstract

The utility model belongs to a pneumatic conveying device, which is a steady-flow chamber pump for conveying powdery materials. It has three top warehouses, middle warehouses and bottom warehouses which are connected in series in sequence. There are feeding valves between the three warehouses. The compressed air source passes through the main gas pipeline and the first and second branch pipelines on the main pipeline. They are respectively connected with the middle warehouse and the bottom warehouse, and a three-way reversing valve is arranged between the main gas pipeline and the first branch pipeline of the middle warehouse, and the third port of the reversing valve is connected with the top warehouse. The top bin is used to store materials, the bottom bin is always connected with the compressed air source for outputting materials, and the middle bin is used for discharging materials. Through the three-way reversing valve, the connection or isolation between the three chambers can be realized, so as to realize the continuous conveying of materials.

Description

Steady flow chamber pump for conveying powdery materials

technical field

The utility model relates to a pneumatic conveying device, in particular to a steady-flow chamber pump for conveying powdery materials.

Background technique

At present, medium and long-distance powder materials are often conveyed by pressure, and the warehouse-type pneumatic conveying equipment mainly includes single-chamber pumps and double-chamber pumps. The Fowler pump of the U.S., the warehouse type pump conveying device disclosed in Chinese patent CN2317217 is exactly a kind of single warehouse pump, and it is to carry out feeding, pressurization, discharge and pressure relief successively in a warehouse, so it is intermittent feeding. Although the multi-compartment dense-phase pneumatic conveying device disclosed in Chinese patent CN2490130 has multiple compartments, it only uses multiple single-compartment pumps in parallel. Chinese patent CN2331629 discloses a double-compartment conveying device. The conveying device has two warehouses. After the first warehouse is filled with materials, it takes a few seconds to open the second warehouse and feed materials to the second warehouse. After the material is full, close the feed valve of the second warehouse, and then pressurize the material. This type of double-chamber pump can realize semi-continuous transportation, but according to statistics, the downtime of the cement mill due to the failure of the double-chamber pump accounts for 50-70% of the total downtime. And because there are many factors that lead to the failure, it is more difficult to judge and eliminate the failure of the double chamber pump during the transportation process than other transportation equipment.

Contents of the invention

The technical problem to be solved by the utility model is to provide a steady-flow chamber pump capable of continuously conveying powdery materials.

The technical solution to solve the above problems is that the provided steady-flow bin pump for conveying powdery materials includes a compressed air source, a bin and an electrical control device. The special feature of the utility model is that the said warehouse is a top warehouse, a middle warehouse and a bottom warehouse which are sequentially connected in series, wherein a first feed valve is arranged between the top warehouse and the middle warehouse, and a first feed valve is arranged between the middle warehouse and the bottom warehouse. There is a second feed valve, the top warehouse is equipped with a material inlet, the bottom warehouse is equipped with a material outlet, the middle warehouse and the bottom warehouse are equipped with material level gauges, and the compressed air source passes through a main gas pipeline and the outlet on the main pipeline. The first branch pipeline and the second branch pipeline are respectively connected to the upper part of the middle warehouse and the bottom warehouse, and a three-way reversing valve is arranged between the main gas pipeline and the first branch pipeline of the middle warehouse. The interface is connected with the top compartment. The top bin is an atmospheric bin, which is used for storage and buffering. The bottom chamber is a pressure chamber, which is always connected with the compressed air source and used to transport materials outward. The middle warehouse is a transitional warehouse. Through the three-way reversing valve, the middle warehouse can be connected with the top warehouse and isolated from the bottom warehouse; and the middle warehouse can be connected with the bottom warehouse and isolated from the top warehouse, so that the materials are sent from the top warehouse to The middle warehouse, and then in the process of being sent from the middle warehouse to the bottom warehouse, the bottom warehouse always maintains a certain pressure to achieve continuous and stable output of materials.

In order to keep the materials in each chamber in a better fluidized state and facilitate the unloading in the chambers, air with a lower pressure can be introduced from the lower part of each chamber to loosen the materials. For this reason, a third branch pipeline can be set on the above-mentioned gas main pipeline, and the third branch pipeline is connected to the bottom of the top storehouse, the middle storehouse and the bottom storehouse respectively through a decompression device and a reversing valve.

The above-mentioned first feed valve and the second feed valve are preferably feed bell valves.

Compared with the prior art, the utility model is provided with an intermediate transition link, so that the bottom bin always maintains a stable delivery pressure, not only can realize the continuous delivery of materials, but also reduces the start and end links of delivery, and improves the average solid-gas ratio And system stability, reduce gas consumption. Due to the continuous conveying, the output of the conveying pipeline with the same diameter can be increased, the standby time of the air compressor can be reduced, the working efficiency of the air compressor can be improved, and the power consumption per ton of conveying powder can be reduced. The utility model can be used not only in the dilute-phase pneumatic conveying system, but also in the dense-phase pneumatic conveying system, and can replace and transform existing single-chamber pumps, double-chamber pumps and jet pumps. The utility model can be used for conveying kiln tail raw materials, kiln dust, coal powder, cement and other powdery materials in the cement industry.

Description of drawings

Accompanying drawing is the structural principle diagram of an embodiment of the utility model.

Detailed ways

As shown in the figure: the air compression source 1 is composed of an air compressor 11, a pneumatic triple unit 12 and an air bag 13, and the top chamber 2, the middle chamber 3 and the bottom chamber 4 are connected in series up and down. The air compression source 1 communicates with the middle warehouse 3 and the bottom warehouse 4 respectively through the shut-off valve 14, the main gas pipeline 15, the first branch pipeline 34, and the second branch pipeline 44. A three-way switch is provided between the main pipeline 15 and the branch pipeline 34. To the ball valve 6, the third interface of the three-way reversing ball valve 6 communicates with the top storehouse 2 through the branch pipeline 23 again. The upper part of the top bin 2 is provided with a feed inlet 21 and an exhaust filter bag 22 , the middle bin 3 is provided with a material level gauge 33 , and the bottom bin 4 is provided with an upper material level gauge 43 , a lower material level gauge 45 and a discharge port 46 . A first feed bell valve 31 is provided between the top storehouse 2 and the middle storehouse 3, a second feed bell valve 41 is provided between the middle storehouse 3 and the bottom storehouse 4, and the two bell valves are driven by cylinders 32, 42 respectively. In addition, the main pipeline 15 is also provided with a third branch pipeline 5, which is divided into three paths through a shunt air bag 51 and leads to the bottom of the three chambers respectively. 53 and solenoid valve 54 lead to top storehouse 2, and other two roads are identical with the first road, and wherein the second routing solenoid valve 55 controls, and the third routing solenoid valve 56 controls. The pressure of the wind sent from these three paths to the three chambers is relatively small, and its function is to make the materials in the chambers in a fluidized state, so it is also called fluidized wind.

The working process of the device is as follows: when the bottom bin 4 is filled with materials (at this time, the position of the ball valve 6 isolates the bottom bin from the other two bins), close the feed bell valve 41 between the two bins, and pressurize the bottom bin 4 , and send fluidizing air to the bottom storehouse 4 through the electromagnetic valve 56. When the bottom chamber pressure reaches the set value, the discharge ball valve 47 is opened, and the conveying starts. During the conveying process, when the material in the bottom bin 4 reaches the discharge level, start the three-way ball valve 6, so that the middle bin 3 communicates with the bottom bin 4 and isolates it from the top bin 2. When the pressure in the middle bin and the bottom bin is balanced, the feed bell valve 41 of the bottom bin 4 is opened, the solenoid valve 55 is opened, and the fluidizing air is sent to the middle bin 3 to discharge the middle bin to the bottom bin. When the material in the bottom bin 4 reaches the loading level, stop sending the fluidizing air to the middle bin, start the three-way ball valve 6, disconnect the middle bin 3 from the bottom bin 4, and communicate with the top bin 2, then the middle bin 3 rows gas. After the gas in the middle bin 3 is emptied (at the same normal pressure as the top bin), the feed bell valve 31 of the middle bin 3 is opened, and the solenoid valve 54 is opened to send fluidizing air to the top bin 2, and the middle bin 3 feeds. After the middle warehouse is full, wait for the signal of the material level gauge 45 in the bottom warehouse to start the next cycle, and the sequential actions of the above valves can be controlled by the PLC programmable controller. During the process of discharging materials from the middle bin, the conveying of the bottom bin does not stop, thereby realizing continuous feeding. The device is suitable for pneumatic conveying in any mode (that is, dilute phase or dense phase).

Claims (3)

1, a kind of current stabilization cone pump of conveying powder material, comprise a compressed air source and electrical control gear, it is characterized in that being provided with the storehouse, top of serial connection connection successively, storehouse, middle part and storehouse, bottom, wherein be provided with first inlet valve between storehouse, top and the storehouse, middle part, be provided with second inlet valve between storehouse, middle part and the storehouse, bottom, the storehouse, top is provided with inlet point, the storehouse, bottom is provided with discharging opening, storehouse, middle part and storehouse, bottom are provided with level-sensing device, compressed air source is by first branch pipe(tube) on a gas circuit total pipeline and this total pipeline, second branch pipe(tube) links to each other with the top of storehouse, middle part with the storehouse, bottom respectively, be provided with a three-way diverter valve between first branch pipe(tube) in gas circuit total pipeline and storehouse, middle part, the 3rd interface of this change-over valve links to each other with the storehouse, top.

2, current stabilization cone pump as claimed in claim 1 is characterized in that also being provided with the 3rd branch pipe(tube) on the gas circuit total pipeline, the 3rd branch pipe(tube) links to each other with storehouse, top, storehouse, middle part and the bottom in storehouse, bottom respectively with change-over valve by pressure purger.

3, current stabilization cone pump as claimed in claim 1 or 2 is characterized in that said first inlet valve and second inlet valve are charging clock valve.