Product Description
    In the pneumatic conveying equipment, regular use of the discharge rotation schedule for unloading of materials and dust, and in the process of unloading scheduled stop outside air into the pneumatic conveying system. At present, the main valve discharge rotating impeller-type valves, and so on several.  
First, discharge impeller-type device 
     1. The basic characteristics of the discharge impeller is pneumatic conveying system most commonly used as a nesting, it has to send in low-pressure system was used as a feeder. Powder in the process, it's a very wide range of applications, with the exception can be used to feed and discharge, can also be used to measure and ingredients. 
     Discharge impeller-type structure is reasonable, reliable, smaller and manufacturing science. It is with the rotary Impeller cell room and fixed the case of the two departments for dumping row mobility is better, less grinding powder and granular materials in small block. 
     When the impeller driven by the drive mechanism inside the shell in the rotation, from the upper part of the separator (or hopper) of powder fell by granular materials will feed into the grid impeller room, and with the rotation of the impeller and discharging to the discharge port. Throughout the course of their work, this device has been able to discharge in a row for the quantitative material and unloading. As the impeller and the shell of the co-ordination among relatively close, a certain degree of air tightness, which in the process of unloading at the same time reducing leakage from the role, in the pneumatic conveying system, also called Fan Kuan, lock Valve and so on. 
     2. In the form of structural characteristics of the material disposed of according to schedule and use of different impeller-discharge machine has a different structure. 
     1) according to the transmission shaft layout can be divided into horizontal axis and vertical axis discharge discharging two types of devices. The former is widely used in powder conveying system and gas project, which is used to discharge from the silo with fine-grained materials for ingredients, manufacturing and management costs are Tabuse axis. 
     2) the basic structure of the impeller, the impeller can be divided into the side with no guard and two types of side tailgate. The former platoon dumping powder and granular materials, in principle, direct contact with the shell cover, but dust might leak into the side of the tailgate and shell cavity between the cover and sometimes affect the rotating impeller; the latter structure is relatively simple, but Grinding time delivery of materials cover vulnerable to wear and tear. 
     3) from the requirement to consider the use of better sealing, discharge impeller-type devices have different characteristics. In the operation to ensure that the leaves can be close to the shell wall in order to reduce the amount of leakage. 
     4) In order to discharge in operation when the impeller to prevent the debris was stuck, in a special discharge structure to take some measures to prevent card, when the foreign body was stuck impeller, the mobile part of the shell to automatically move out so that A channel so that foreign bodies can be ruled out. The structure is characterized by: Wear-resistant and sealed in accordance with requirements of the end of the blade with adjustable wear rubber article; accordance with the requirements of anti-card, I used to feed the direction of rotation and tilt the structure of the card with a flexible anti-tailgate in the rotation Axis with the spring Jaw clutch insurance and electric control system composed of anti-shun reverse card safety devices. In addition, at shells there are two pressure pipe joints, with some clutch connection in order to reduce leakage of feed.
3. Impeller-discharge capacity of the device through the ability to determine the type press: 
 Sino-G - through capacity-discharge (t / h); 
      L - Geocell impeller effective length (cm); 
      n - impeller speed, general admission 15 ~ 50r/min; 
      φ - filling factor for bulk granular material and fine φ = 0.7 ~ 0.8; granular materials φ = 0.5 ~ 0.6; light of the powder and foam sheet materials, φ = 0.1 ~ 0.2; 
      R - radius of the outer edge of the impeller (cm); 
      r - Georgian Room at the bottom of the impeller radius (cm); 
      δ - leaf thickness (cm); 
      z - a few leaves (000); 
      ρs - the density of materials (kg/m3). 
     Taking into account the instantaneous system, productivity is likely greater than the productivity of design techniques, in order to be able to guarantee security in a row,'s discharge capacity should be more than pneumatic conveying system design productivity by 0.2 to 1.0 times as large. 
     4. Influence discharge impeller-type performance factors 
    (1) of the leak: As the unloading of the feed-side and pressure side of the nesting poor gap through the impeller and the cell leak into the room of the increase in high-pressure air flow, particle materials will hinder the smooth discharge into the cell-rooms, leading to Discharge of fill-factor and the reduction in capacity, as well as to speed up discharging internal components wear. Reverse-discharge by a large number of air leakage, but also through the transmission lines so that the reduction in gas flow, lower wind speed transmission, which is likely to cause deterioration in the terms of delivery and lower productivity. When a serious leak, even causing the pipes from the plug. To enable the system to normal and stable transmission, the choice of fans when it is necessary to consider the wind to have more production capacity, which means that the system should then increase energy. As a result, leakage is conveying gas-discharge system must be given to the first performance, the design should be seriously considered. Unloading-usual amount of leakage of up to the total air volume fan of 5% to 15%. 
    (2) the number of leaves: the right to determine the number of impeller blades to reduce leakage, improve the performance of the work of unloading device is also critical, in general, 6 of the impeller blades in the operation of the process, to ensure that feed and nesting population Between each side at least a blade can effectively play the role of the labyrinth seal; 8 impeller blades are at least 2 blades, 10 blade of the impeller blade at least 3 to play the role of the labyrinth seal. Pressure from the start to consider limiting the leakage, 10 of the impeller blades apply pressure for 50 ~ 100kPa (gauge), 8 leaves apply pressure to 50kPa, 6 months leaves are applied pressure to 20kPa. 
 For high-suction vacuum delivery systems, in the discharge impeller-operation should guarantee from the mouth to feed nesting population of at least two on each side of the blade to maintain contact with the shell. 
 Leaves too little, of course, the number of insufficient proof, the number of leaves is too much the angle between the smaller, so that leaves room to form a narrow cell, which may be more difficult to make the material from the impeller down in the landing and prevent more Bulk materials and discharged into. For better mobility of powder materials and sealed when the higher, more may be a few leaves, but not up to more than 10. 
    (3) feed the width of the mouth: the provisions of the impeller speed, discharge into the material's volume, with the rate of feed and feed the relevant section. When the rate of feed and feed the mouth of the length (usually equal to the effective length of the impeller) given after the discharge of the device through the impeller and the ability to frame the room filling factor, and only feed about the width of the mouth. In line with the requirements of airtight structure, with the width increased its capacity through the filling factor and there will be increased and enhanced. Unloading-mouth feed off the smallest size, should ensure that materials are free to land normally be expected to lose control over large areas off 2 to 4 times. 
    (4) Speed: The speed of the device through the discharge capacity of about a great impact. In low-speed, the impeller of time Geocell sufficient material from the mouth feed, at this time, with the ability to increase in direct proportion to speed, in theory, the largest of its capacity can only be achieved through the feed from the mouth to limit the cross-section of the largest Money for the material. In fact due to the rotating impeller, the pressure difference and the role of air leakage, the impact of the feed rate, the effective maximum capacity is always lower than the theoretical maximum for the charge. When adopted as the ability to increase the maximum speed, such as the impeller speed continues to increase, due to the impact of particles on the leaves of a rebound effect of increasing the feed material so that the lower speed, through its ability to decrease it. From the nesting population to consider the case, the particles in the internal rotating impeller and the angular velocity was, in the discharge of their mouth is not completely vertical fall. When a lower speed, the particles have sufficient time to drop in the cell interior materials can be emptied completely. However, high-speed, some of the particles emitted too late and they have now been brought back, and thus through the ability to drop. Of light materials because of its small free fall speed, the impact is even more apparent. 
     Unloading-speed is usually in the 15 ~ 50r/min selected. Should be based on material properties, discharge structure, and other forms of consideration. 
    (5) properties of materials: the impact of work-discharge performance characteristics of the materials are: mobility, density, bulk density, plot angle, size distribution, viscosity, grinding, corrosion resistance, hardness, flow resistance, and so on. These physical properties of the discharge decision-making structure in the form and materials. Discharge of fill-factor, as well as the relevant parameters, has real meaning, generally speaking, the surface smooth, uniform size, good mobility, the density of the particles, because of its greater speed to land in the process of loading and discharge Subject to a variety of less resistance and therefore into a smooth, nesting, filling and discharging's coefficient and increased capacity. 
    (6) the shape of leaves: in discharging material into the device, the shape of the leaf cells on the status of filling the room have a greater impact. By discharging into the particle-trajectory analysis of the current most widely used at the center of the feed, radial-shaped leaves in a straight line of feed-discharge condition is not very favorable, since the inflow of materials will be part of the blade rebound . The Center for feed, such as the use of particle trajectories and adapted to bend toward the direction of rotation of the blades, the better-feed, the particles into the cell room at the time of the collision is less friction, will be higher and the filling factor Capacity.
    (7) point of view feed: feed-discharge point of view is important to the structure of one of the parameters. Feed means the angle at the center of the mouth and feed impeller point on the outer circle of radial vector particles of gravity and center of the impeller vertical central angle of the folder. It identified the discharge shell circle on the location of the feed, feed that is the eccentricity. In the case of eccentric feed can be selected through appropriate coordination between the impeller outer radius, angular velocity, feed, as well as the speed of the feed point of view, access to the impeller in the shortest possible radial feed particle trajectories in order to Radial blades can be installed on the high filling factor. Test shows that the feed to shift the direction of rotation of the eccentric feed (feed angle> 15 °) of the radial impeller blade shape in a straight line through the ability to feed the center than before the turn of the impeller blade through a greater capacity. And I feed Nizhe spin move the eccentric feed at the time of filling factor, the feeding centers than the time difference, which is due to the shape of leaves and particle trajectory is not in line to enter the impeller blades by particle collision, interfering with the rebound Because the process of filling. 
    (8) nesting population: its location by the general structure and distribution process demands to determine, in the center of the majority. Nesting population of the length of the section, and normally feed the mouth, are equal to the length of the effective value of the impeller. In order to discharge device can be achieved through higher capacity, in addition to the requirements as far as possible, rooms full of cell, be it as far as possible, all empty. As a result, I discharge under the section width of the grid should be disposed of room air conditions, that is, the nesting angle (at the moment to start nesting cell gravity Granule room at the bottom of the radial vector particle motion to this Excircle impeller at the time of discharge from the impeller gravity The angle between the radial vector) to determine the size, should be at least equal to or greater than nesting angle corresponding to the chord. 
     Unloading-impact performance in addition to the above-mentioned factors, there are temperature. Unloading-body structural strength, stiffness, precision manufacturing and assembly quality.

Technical indicators

Technical characteristics

• Feeding the shell from top to bottom flange valve has two types, the circular flange with a square flange, user-friendly match.
•  Transmission in the form of direct-and-sprocket, sprocket-and even sub-side and bottom-side-even more compact.
•  Cover around the main axis between the impeller and seal-the-art technology for our company to ensure a reliable sealed, leak-free.
•  According to the cavity could be from top to bottom (shell) with the pressure to balance the pressure on the device.
•  Yi arch camber, sticky materials can be easily broken arch devices and anti-stick device clean-up.
•  With impeller "" "V" "U" type, and other means, according to the specific requirements for specific choices.
•  Divided according to type of standard, high-pressure type, wear-and-lining, anti-card-type materials, cleaning type.
•  Can be selected according to different requirements of different materials such as cast iron, cast steel, cast aluminum, carbon steel, 304,316,316 L, and so on.
•  Can be equipped with speed reducer or explosion-proof motor type, in order to meet the requirements of proof of the use of occasions.
•  Bearing Room (both sides) can be equipped with air cover of Sealing, bearing in-house to ensure that there is sufficient high-pressure air, making the material can not enter.
•  Leaves can be equipped with side-wear seal, used to further enhance the effectiveness of air lock.