CN102295167A - Fluidized suction nozzle device for negative-pressure pneumatic ship unloading device - Google Patents

Abstract

The invention discloses a fluidized suction nozzle device used on a negative pressure pneumatic ship unloading device. Butterfly valves are respectively installed at the air inlets of the air inlet pipe, and brackets are provided on the periphery of the ring wall of the housing. The upper connection of the upper connection is connected with the air inlet hose, the lower connection of the four-way connection and the three-way connection is respectively connected with a steel pipe, and the bottom of the steel pipe is respectively connected with a horizontal fluidization pipe, and the adjacent fluidization pipes are connected with each other from the end to form An annular pipe, the annular pipe surrounds the mouth of the suction nozzle at the lower part of the casing, and several air outlet holes are respectively arranged on the fluidizing pipe. The structure of the invention is relatively simple, its weight is lighter than that of a mechanical fluidization device, its service life is long, and its maintenance is convenient.

Description

A fluidized suction nozzle device used on a negative pressure pneumatic ship unloading device

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Technical field:

The present invention mainly relates to the field of negative pressure pneumatic ship unloading device, in particular to a fluidized suction nozzle device used on negative pressure pneumatic ship unloading device.

Background technique:

    Negative pressure pneumatic ship unloading device is a kind of pneumatic conveying equipment. Pneumatic conveying method has good material adaptability, long conveying distance; no secondary pollution; flexible conveying pipeline layout, less floor space, materials can be conveyed to different areas, and can also be concentrated in one place from several different places; There are few mechanical transmission parts, simple structure, convenient operation and management, few wearing parts, and low maintenance costs; the whole system is easy to realize automatic control, and can continuously monitor system operation conditions (such as pressure, bulk material delivery, etc.) and other advantages. At the same time, due to the improvement of national environmental protection requirements, the market for pneumatic conveying methods will become larger and larger.

The negative pressure pneumatic ship unloading device is mainly used to transport some powdery and granular materials, such as cement, fly ash, coal powder, wheat, corn, etc. However, in many unit operations of powder engineering, failures such as material arching and blockage often occur, especially in cement plants, various powder silos often have blockage and arching, and even interfere with normal production in severe cases. Due to the characteristics of powder and granular materials, it is difficult to completely solve the above problems in the process and equipment design. Therefore, people have conducted a lot of research over the years in order to find out good methods, such as automatic knocking, vibration and air cannon, etc. . But no matter which method can not completely solve the phenomenon of abnormal material flow. After on-site observation and analysis, the key to solving this problem lies in the fluidization of materials. Fluidization refers to the full contact and mixing of solid powder and granular materials with gas so as to have a flow performance similar to a fluid state. Usually, because most of the materials conveyed by pneumatic force are fine powder particles, the materials are densely accumulated in the silo, so the suction nozzle of the negative pressure pneumatic ship unloading device must use a loose fluidization device when sucking materials. The powder material is loosened and fluidized, so that the powder material is efficiently sucked by the suction nozzle, then passed through the conveying pipeline, and finally sucked to the destination. Traditional loose fluidization devices basically adopt mechanical loosening, using mechanical stirring to loosen materials. If a sprocket is installed on the suction nozzle, a number of rotating blades are fixed in one circle of the sprocket. The sprocket is driven by the electric transmission device installed on the suction nozzle, and the blade is driven by the sprocket to loosen the material. At present, most of the foreign equipment has a cylinder that can be rotated outside the suction nozzle, and there are some protruding blades on the cylinder. In addition, a hydraulic motor is also used to rotate the cylinder through gear transmission, and the blades on the cylinder then stir the thick powder.

Through the inspection of the existing equipment, it is found that there are many disadvantages of using this method, because the working environment of the suction nozzle is generally relatively harsh, and dust particles are inevitably mixed into the transmission connection, and the final result is that the mechanical device part is very It is easy to be worn and even damaged, which seriously affects the production efficiency of the ship unloading device; in addition, it is necessary to provide a special power device for the mechanical device, such as an electric motor, which increases the self-weight of the suction nozzle and the complexity of its structure. The most important thing is increased energy consumption.

Invention content:

The object of the present invention is to make up for the defects of the prior art, and provide a fluidized suction nozzle device used on a negative pressure pneumatic ship unloading device, which reduces energy consumption and reduces the weight of the suction nozzle.

The present invention is achieved through the following technical solutions:

A fluidized suction nozzle device used on a negative pressure pneumatic ship unloading device, including a cylindrical shell, the side wall of the shell is provided with an air inlet pipe that communicates with each other, and the air inlet pipe Butterfly valves are respectively installed at the air inlets, and it is characterized in that: a bracket is provided on the periphery of the ring wall of the housing, and a four-way and several three-way communication with each other and surrounding the upper periphery of the housing are arranged on the bracket. The upper interface of the four-way is connected with an air inlet hose, the lower interfaces of the four-way and the three-way are respectively connected with steel pipes, and the bottoms of the steel pipes are respectively connected with horizontal fluidization pipes, and the adjacent fluidization pipes are connected from the beginning to the end. An annular pipe is formed, and the annular pipe surrounds the mouth of the suction nozzle at the lower part of the housing, and several air outlet holes are respectively arranged on the fluidizing pipe.

The fluidized suction nozzle device used on the negative pressure pneumatic ship unloading device is characterized in that it includes a Roots vacuum pump, and an exhaust pipe is connected outside the exhaust port of the Roots vacuum pump, and the exhaust pipe There is a muffler and a flow regulating valve on it; the air inlet hose is connected to the part between the exhaust port and the muffler on the exhaust pipe.

The fluidized suction nozzle device used on the negative pressure pneumatic ship unloading device is characterized in that: the three-way includes five.

The fluidized suction nozzle device used on the negative pressure pneumatic ship unloading device is characterized in that: the fluidized pipe is formed by winding steel pipes, steel wires and steel wire nets with several air outlet holes.

The fluidized suction nozzle device used on the negative pressure pneumatic ship unloading device is characterized in that: the steel pipe is connected to the fluidized pipe through a conical joint.

In the present invention, the depth of the suction nozzle inserted into the material is relatively shallow, so the amount of air intake can be appropriately adjusted according to the thickness of the powder accumulation, and the powder material can be fluidized reasonably. Therefore, the pressure required for the air source is very low, and the amount of air used is very small. The air source used can be directly from the exhaust port of the Roots vacuum pump or compressor equipped with the pneumatic conveying system itself, so as to achieve the purpose of energy saving and emission reduction. The main part of the present invention is the porous fluidization rod distributed around the mouth of the suction nozzle, i.e. the fluidization tube.

On the exhaust pipe, a slender air inlet hose with a trumpet shape is connected between the Roots vacuum exhaust port and the muffler, which is used to receive the exhaust gas discharged from the Roots vacuum pump. The other end of the air inlet hose is directly connected to the four connected to the common up interface. In order to make the exhaust gas enter the air inlet hose smoothly, a flow regulating valve is installed on the exhaust pipe of the Roots vacuum pump, and the flow regulation of the fluidizing gas can be smoothly realized by adjusting the opening size of the valve.

Because the working position of the present invention usually needs to be changed so that the suction nozzle can suck the materials in different orientations, the trachea at the joint of the suction nozzle must be a flexible pipe so that it can adapt to the movement of the suction nozzle, but considering The wear resistance of the flexible hose is insufficient, and the mouth of the suction nozzle must frequently contact and rub with the material and move the position, which will inevitably cause the wear of the hose, cause the gas in the pipe to leak, and affect the working efficiency of the present invention. Therefore, the present invention The invention converts the hose into six steel pipes through the four-way joint and the three-way joint, and the six steel pipes are evenly distributed around the mouth of the suction nozzle. Through these conversions, the original air flow is divided into six equally. At the bottom of the suction nozzle (this part is usually inserted into the powder material during work), the six air inlet pipes around the suction nozzle are integrated into an annular ring. The annular ring here is composed of six sections of porous fluidization rods, and the six sections of porous fluidization rods are connected with six steel pipes, and the lower part of each steel pipe is also a small section of mesh porous fluidization rods In this way, the purpose of evenly distributing the fed gas around the suction nozzle is achieved.

Porous fluidized rods are drilled and made of steel pipes, steel wires, and wire meshes with a certain number of small holes. Before the suction nozzle starts to work, open the flow regulating valve, let the invention work under no-load condition for a period of time, then slowly insert the lower part of the invention into the material, and adjust the flow reasonably according to the dust level of the material on site The opening of the valve is so that the suction nozzle can suck the material as fast as possible without generating dust. After the powder material is damp and blocked, it is only necessary to lift the present invention, let it exhaust for a period of time under no-load, and the porous fluidized rod can be blown through.

When sucking abrasive powder materials, in order to improve the service life of the suction nozzle, the inner sleeve seamless steel pipe with the suction nozzle of the fluidization device adopts the wear-resistant seamless steel pipe lined with corundum, and the nozzle mouth is surfacing welded for durability. Grind the welding rod.

The discharge port on the upper part of the shell is connected with the material conveying pipe through the flange. The butterfly valve is a manual rubber-lined butterfly valve. The manual rubber-lined butterfly valve is connected to the air inlet of the air inlet pipe on the shell through a flange, and is mainly used to adjust the air intake volume to adapt to the conveying speed of the material; The gas is evenly distributed around the nozzle mouth of the lower part of the present invention through the cooperation of six small rubber tubes and tees. Since the porous fluidized tube is a consumable part, a conical joint is used here to facilitate maintenance, disassembly and installation. When the present invention is working, the part close to the feed port is easy to wear and tear when it is in contact with the powder material for a long time, so welded steel pipes are used here to transmit the fluidizing gas.

Description of drawings:

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

Fig. 2 is a schematic diagram of the system layout of the present invention.

Detailed ways:

See attached picture.

A fluidized suction nozzle device used on a negative pressure pneumatic ship unloading device, including a cylindrical shell 1, the side wall of the shell 1 is provided with an air inlet pipe 2 communicating with each other, the inlet Butterfly valves 3 are respectively installed at the air inlets of the air duct 2, and brackets 4 are provided on the periphery of the ring wall of the housing 1. The brackets 4 are provided with a four-way 5 and five valves that communicate with each other and surround the upper periphery of the housing 1. Tee 6, the upper interface of the four-way 5 is connected with the air inlet hose 7, the lower interface of the four-way 5 and the three-way 6 is respectively connected with a steel pipe 8, and the bottom of the steel pipe 8 is respectively passed through a tapered joint 9 communicates with a horizontal fluidizing pipe 10, and the adjacent fluidizing pipes 10 communicate with each other from end to end to form an annular pipe. There are several air outlets. The fluidizing pipe 10 is formed by winding steel pipes, steel wires and steel wire nets provided with several outlet holes.

It includes a Roots vacuum pump 11, the exhaust port of the Roots vacuum pump 11 is connected with an exhaust pipe 12, and the exhaust pipe 12 is provided with a muffler 13 and a flow regulating valve 14; the air inlet hose 7 is connected to the exhaust pipe The air pipe 12 is located between the exhaust port and the muffler 13 .

Claims (5)

1. fluidization nozzle unit that is used on the negative pressure strength cargo unloader, include the housing of tubular, the sidewall of described housing is provided with the blast pipe that is interconnected, the ventilation inlet position of described blast pipe is separately installed with butterfly valve, it is characterized in that: the ring wall periphery of described housing is provided with support, described support is provided with a four-way and the some threeways that is interconnected and is looped around periphery, housing top, the last interface of described four-way is communicated with the air intake flexible pipe, the lower interface of described four-way and threeway is communicated with steel pipe respectively, the bottom of described steel pipe is communicated with horizontal fluidisation pipe respectively, adjacent fluidisation pipe is interconnected from beginning to end and forms ring pipe, described ring pipe is looped around the suction nozzle oral area position of lower housing portion, is respectively equipped with some exhaust vents on the described fluidisation pipe.

2. a kind of fluidization nozzle unit that is used on the negative pressure strength cargo unloader according to claim 1, it is characterized in that: include Roots vaccum pump, the exhausr port of described Roots vaccum pump is communicated with freeing pipe outward, and freeing pipe is provided with silencer and flow control valve; Described air intake flexible pipe inserts the position between exhausr port and silencer on the freeing pipe.

3. a kind of fluidization nozzle unit that is used on the negative pressure strength cargo unloader according to claim 1, it is characterized in that: described threeway includes five.

4. a kind of fluidization nozzle unit that is used on the negative pressure strength cargo unloader according to claim 1, it is characterized in that: described fluidisation pipe is to be entwined by the steel pipe that is provided with some exhaust vents, steel wire and wire net.

5. a kind of fluidization nozzle unit that is used on the negative pressure strength cargo unloader according to claim 1, it is characterized in that: described steel pipe is connected by the taper movable joint with the fluidisation pipe.

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