With the depletion of fossil energy, the development and utilization of alternative energy and renewable energy has become the focus of research in various countries. However, the per capita energy resources in China are very low, and the distribution is extremely uneven.
High Pressure Carbon Steel Pipe Fittings or Forged Carbon Steel Fittings including Socket-Welding Pipe Fittings , Threaded Pipe Fittings, Olet, Flange, EN Standard Pipe Fittings and Instrumentation Fittings. These kind of Pipe fittings are forged carbon steel with high pressure, they are special use for the high pressure pipelines, equipment, and so on.The connection including Threads or Socket-welding. Normally the surface are original colour.
Products: High Pressure Carbon Steel Pipe Fittings or Forged Pipe Fittings
Material: Carbon Steel A105
Pressure: 3000Psi,6000Psi,9000Psi
Standard:GB/T 14383,ASME B16.11,EN Standard
Connection: Socket-Welding and Threaded(NPT, BSP,DIN,EN or as requirements)
Item: Elbow,Street Elbow,Tee,Socket,Nipple,Union,Bushing,Plug,Cap,Olet,Flanges,etc
Size: 1/8" to 4"
Inspection: Every Piece and can issue Quality Report
Packing:Carton/Pallet/Wooden Case
Application:Oil,Steam,Gas and so on Fluids.
0 Preface
With the depletion of fossil energy, the development and utilization of alternative energy sources and renewable energy sources has become the focus of research in various countries, and for developing countries with low per capita energy resources and uneven distribution. It is especially important. At present, biomass as energy mainly refers to agriculture, forestry and other wastes, such as various crop straws, oil crops and wood processing waste, urban industrial organic waste and animal waste. According to statistics, China's annual straw output is about 700 million tons, and some of it is used as feed and other raw materials, and it is used as energy utilization of 376 million tons.
The raw material of the plant straw is loose, large in volume, low in calorific value, inconvenient to transport and store, and the straw briquetting machine is used to densely form the straw, which can become a high-grade fuel. The straw forming fuel has the advantages of high density, convenient transportation and storage, uniform shape and property, good combustion performance, high calorific value, strong adaptability, convenient fuel operation control, etc. It can be used in boilers and gas generators, and also in industrial and household industries. It is heated in the greenhouses of agriculture and gardens. As a large agricultural country, China has abundant plant straw resources. Therefore, straw energy will become a very important alternative energy source for development.
At present, the straw briquetting machine is mainly divided into three types: spiral extrusion molding machine, piston stamping molding machine and ring mode forming machine. This paper mainly analyzes the structure of the ring model straw briquetting machine.
1. The overall structure and working principle of the ring mode briquetting machine
The straw briquetting machine is mainly composed of a motor, a feeding mechanism, a feeding hopper, a pulley, a belt, a protective cover, a ring die compression chamber and a base, and the overall structure is shown in FIG.
Granulator straw briquetting machine
The extrusion mode of the ring-type straw briquetting machine is open compression, and the short-stage bulk material is formed by the friction extrusion between the ring mold, the pressure roller and the material. The motor 1 drives the pulley 4 to rotate through the belt 5, thereby driving the spindle to rotate. Since the main shaft is connected to the pressure roller mechanism and the feeding mechanism, the pressure roller mechanism and the feeding mechanism 2 are driven to operate. The bulk material enters the body cavity of the screw feeding mechanism with unequal pitch through the feeding hopper 3, and the material is continuously and evenly fed into the ring die compression chamber 7 through the spiral blade. The relative movement of the ring die and the pressure roller gradually presses the material into the forming hole of the ring die, and the material is formed layer by layer under the pressure of the pressure roller and the wall of the hole. Due to the difference in the number of modules and the power of the motor, the output of the ring mode briquetting machine is generally 500 to 2 000 kg/h, and the suitable spindle speed is 130 r/min.
2. Transmission and feeding mechanism analysis
The driving method of the briquetting machine is belt driven. The belt drive has the ability to overload protection and buffer absorption. Since the feed is sometimes uneven, the load of the briquetting machine changes greatly and frequently, and an overload situation may occur during the working process. The belt drive can reduce the influence of the overload and protect the briquetting machine. The core components of the briquetting machine are the feed mechanism and the ring die compression chamber. At present, the common feeding mechanism and the transmission mechanism of the ring-shaped compression chamber are separate, commonly known as "two shafts", that is, the pressure roller transmission is driven by the main shaft of the connecting pulley, and the screw feeding mechanism is driven by the other shaft. Therefore, the machine mechanism is complicated, bulky, and consumes a lot of energy.
In order to simplify the mechanism and improve the efficiency, the transmission mechanism and the feeding mechanism of the present invention adopt the form of "one shaft", as shown in Fig. 2. Under the driving of the pulley, the main shaft 1 rotates simultaneously with the pressure roller 2 via the tailgate 6, and then drives the feeding shaft 4 and the screw feeding cylinder 3 through the front baffle 5 to rotate, so that a group of motors can drive the pressure roller mechanism. Work at the same time as the feed cylinder.
Granulator straw briquetting machine
3. Analysis of compression chamber structure
The compression chamber structure is shown in Figure 3. The compression of the straw material is achieved by the relative movement between the ring die 1 and the pressure roller 3. The ring die is fixed on the body by bolts. The two pressure rollers are fixedly connected by the front baffle 4 and the tailgate 5. The rear baffle 5 and the main shaft are connected and rotated by the motor, and the friction wheel of the material rotates while revolving. .
Granulator straw briquetting machine
The compression chamber adopts a double pressure roller mechanism, and the two pressure rollers are symmetrically arranged with the main shaft as the center line, so that the pressure roller is evenly distributed, and the material can enter the ring groove uniformly and timely, which not only increases the output, but also ensures the spindle and the advance. The concentricity of the shaft. Each time the pressure roller completes the revolution cycle, the material in the groove of the ring die is pressed into the die hole, thereby forming a laminate of the material block. As the material continues to feed, under the pressure of the pressure roller, the material is continuously squeezed into the die hole, and the material compact is formed through the die hole.
The gap between the ring die and the pressure roller has an important influence on the yield and performance of the briquet machine. When the gap between the ring die and the pressure roller is small, since the material is easily cut during the pressing process of the pressure roller and the module, the wire is not broken and the power is consumed. However, if the gap is too small, the friction between the metals will be caused, and the wear of the ring mold and the pressure roller surface will be accelerated, especially during the idle operation when the briquetting machine is started and stopped, the wear effect is more intense. When the gap between the ring die and the pressure roller is large, the frictional effect is reduced, but it has a great influence on the output of the briquetting machine. By adjusting the tooth sleeve and rotating the eccentric shaft, the distance between the pressure roller and the ring mold can be changed, and the purpose of adjusting the distance between the pressure roller and the module is achieved.
4, ring model structure analysis
The ring die is one of the most important components of the briquetting machine, and its performance directly affects the performance of the briquetting machine. Due to the friction between the ring die, the pressure roller and the material 3. In particular, the high-pressure friction of the material in the ring die hole and the material itself are deformed by force, and the energy consumed is released as heat energy. Increasing the temperature of the ring mold and the material leads to accelerated wear of the ring mold and shortened service life.
The ring die has two forms of integral forging and combination. The integral forged ring mold adopts an alloy steel integral forged ring blank, and then uses a drill to machine a plurality of round holes, and then mills four corners with a milling cutter to make the round hole a square hole. Milling requires multiple times of tooling, resulting in knife marks on the machined surface. It is difficult to meet the design requirements on the inner surface of the hole, which greatly increases the resistance of the material during movement in the hole, resulting in faster wear of the die hole and blockage during work. . In addition, due to the thick wall of the ring mold body, the processing time of the die hole is long, and the heat treatment process is difficult to achieve the desired effect, and the surface hardness is low, which causes the wear of the ring die to be accelerated during work, and can only be scrapped as a whole when it is serious, so that the maintenance cost is high. .
Granulator straw briquetting machine
The combined ring die is assembled by a plurality of individual small modules. The ring die is composed of a plurality of single-piece "work"-shaped modules, and the die holes are rectangular square holes, as shown in FIG. The module is bolted to the body so that it can be repaired and replaced. The structure is superior in processing technology, material consumption and installation precision, and the processing precision is easy to ensure, and the surface quality in the hole is obviously higher than that of the integral ring mold. The service life of a high-quality ring die is 800-1000h, which refers to the life of the ring die which is fatigue-damaged by the normal use of the pressed material. Since the heat treatment effect of the combined module is obviously better than that of the integral ring mold, the hardness of the working surface is easily ensured, and the service life of the ring mold is prolonged. In addition, only severely worn modules can be replaced. Maintenance costs are greatly reduced compared to the overall ring mode structure.
5 Conclusion
The ring mode straw briquetting machine transmission mechanism adopts “one shaft†design, which simplifies the structure of the whole equipment. The compression chamber adopts double pressure roller mechanism, which improves the productivity of the briquetting machine and the stability of the machine. Repair and replacement, the cost is lower. Through the analysis of the overall structure, transmission mechanism, compression chamber and ring mold structure of the ring model straw briquetting machine, it provides an important theoretical basis for the optimization design of the briquetting machine.
Sanmenxia Futong New Energy sells biomass fuel feed molding machinery such as pellet machine, straw briquetting machine and feed pellet machine, and we also have a large amount of biomass pellet fuel for sale.
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Submission:
High Pressure Steel Fittings,Carbon Steel Pipe Fittings,Forged Carbon Steel Pipe Fittings,Forged Pipe Fittings
HEBEI ZIFENG NEW ENERGY TECHNOLOGY CO.,LTD. , http://www.zifengpipeline.com