The apron feeder for sale was developed in the 1950s, which was introduced from Soviet Union and German technology at the end of 80, which was widely used in the building materials, coal, gold, mining and chemical industry in our country, mainly used in hopper to supply material to crusher and other equipment. Its advantages are: (1) large feeding capacity, foreign has reached 12000 pieces of domestic has reached 5000 left (2) large feeding size, generally used in the raw material warehouse, particle size up to 2m; (3) can withstand a large pressure warehouse and bear the impact of large materials; ④ Can transport hot materials, even can transport up to 500~1000℃ baked caking ore; (5) can be inclined layout, especially can be inclined up 25 transportation, to adapt to a variety of complex technology; ⑥ Low noise. Disadvantages are: (1) bulky, high cost of initial investment; ② Sometimes there is the problem of leakage. 1. The early plate feeder chain plate shape is simple, there is no complex shape lap, so there is a common phenomenon of leakage at the joint of the chain plate. For this reason, the early heavy plate has been eliminated or is in the process of elimination, which will not be analyzed here. The new chain plate structure mainly has two kinds, the leakage problem has been greatly improved. However, compared with other models, the problem of sprinkling still exists, the main reason is that the details of the chain plate structure are not properly handled and the chain plate sticky material, which is mainly related to the chain plate structure. 1.1 Double arc plate lap structure The double arc plate lap structure is shown in Figure 1, and its advantages are as follows. Due to the characteristics of the material Angle of rest, so that the chain plate in the straight direction of the length of the lapping can not leak material. 0 Because of the double arc plate lap more, and in the drive or return sprocket bend there is still part of the lap, so there is no leakage at the turning.) Because each chain plate is pressed into two solitary shape, so in the case of material increase is not a lot of color steel plate effect, that is, the modulus of bending section is greatly improved. ④ Because the shape of the sealing effect is above the bottom plate, the chain can be installed in any position of the length of the chain plate. In the same trough width, active and passive sprocket and chain support wheel spacing can be greatly reduced, the overall equipment width can be reduced, reduce the mass, transportation installation difficulty.
The disadvantages of this structure are as follows. (1) The pressed arc should occupy most of the dimension of the width direction of the chain plate, and the flat section of the installation is small. Early plate feeder especially plate) mostly use plate chain, which is characterized by a very long pitch, but left to chain plate installation bolt spacing is very short, easy to install. At present, most of our medium plate feeder plate load is relatively low, chain plate adopts 10~16 mm thick processing steel plate, for heavy plate, commonly known as tank chain), because of the advantages of high pitch precision, high surface hardness, deep hardening layer and high material standards, it is widely used. During the design and manufacture, the relationship between the die forging chain pitch and the mounting size of the chain plate should be controlled to ensure the flexible rotation of the chain plate. The load of 0 heavy plate is large, and the bottom plate of the chain plate is generally required to be 1625mm thick, in order to increase the wear resistance and smash resistance, and improve its service life. Because the structure of the chain plate requires the circular radius of the two sections to be R60R100mm, it is necessary to adopt the investment casting process to ensure the size error of the chain plate and the rationality of the connection, which increases the manufacturing cost. 1.2 Single arc plate lap structure is shown in Figure 2. This structure moves the sealing structure from above the bottom plate of the chain plate to below the chain plate, turning two arcs into one arc. Its advantages are as follows. Manufacturing is relatively easy, because the arc plate is below the bottom plate, the arc plate strength requirements are low, generally choose 10mm thick steel plate and the bottom plate welding, the manufacturing cost is low. ② The sealing effect is also good, between the bottom plate and the bottom plate is generally 0~4mm gap, arc plate and bottom plate is 5mm gap in theory, but after a short period of trial run, the two gaps are almost all sealed by viscous materials, forming a seamless state, reducing the leakage of material. The disadvantages of this structure are as follows. 0 Adopts multi-tooth and multi-pitch chain plate mode, non-uniform operation, the new type of heavy plate is generally adopted multi-tooth and double-pitch transmission mode. Its impact on the system is already several times less than the old heavy plate. As shown in Figure 3, the running speed v=Rwc0p, since the double chain drive Angle p changes into the number of sprocket teeth within the range of ±1802), the acceleration a=dvd1 RwC0, i.e. In addition, when the chain pin shaft enters the sprocket tooth slot, there is a certain impact and noise, causing the material to fall down on the gap between the chain plate, forming a spill; O In the transport of extremely dry fine powder materials, materials will be trace down from the arc plate gap. This situation is more obvious when the heavy plate is transported up the Angle, because the Angle of the gap is closer to the vertical.
1.3 Unreasonable design of the end structure of the chain plate In the single arc plate structure, if the end structure design is shown in Figure 4, when a little material flows from the protective cover baffle, the material will leak out on both sides of the chain plate wing plate, and the material will fall on the return chain plate. When it runs to the return sprocket, it will cause spilling.
As shown in FIG. 5, if the position of the shield is above the chain plate reinforcement, the bottom surface of the side plate of the shield is too high from the bottom plate of the chain plate, and the material will flow into the core layer of the chain plate wing plate in the direction of the Angle of repose, resulting in wine.
1.5 No storage device is set for materials that normally overflow the side plate of the protective cover, as shown in Figure 6. Due to the fluidity of materials, a small part of materials will overflow between the side plate of the protective cover and the bottom plate of the chain plate. When the material runs to the highest point of the head drive sprocket, it will be thrown out of the protective cover along with the running speed of the chain plate and cause spilling. 1.6 In addition to structural reasons, due to excessive material viscosity, the material stuck on the chain plate will fall off due to its own weight in the return journey.
2. The solution of plate feeding machine sprinkling
2.1 Optimization of Single circular arc plate lap structure In the single circular arc plate lap structure, the chamfering is designed as 3mm× 25mm, the effective lap size of the straight section of the arc plate and the bottom plate is 10mm, and the inner circle radius of the arc plate is 4mm smaller than the hinge point of the chain. In order to meet the design requirements, special fixture is used to fix the welding, and then 200 press is used to adjust the shape.
2.2 Treatment of the end structure of the chain plate Figure 7® is the optimization of the end structure of the double-circular plate chain plate to ensure that the overlapping part of the end of the material does not spill. Figure 76 shows the structure of the end of the chain plate of the single circular plate. Through the special shape treatment of the chain plate and the connecting parts of the chain plate, the apron feeder for sale bottom of the flank plate of the chain plate extends downward and is directly welded to the lowest point of the circular plate, so that a small amount of materials spilled by the protective cover are not easy to spill.
2.3 The treatment of the connection structure of the protective cover baffle and chain plate is shown in Figure 8. Disconnect the reinforcing rib of the chain plate near the wing plate, reduce the protective cover baffle to the position of 10mm of the bottom plate, and then extend the protective cover baffle inward for a small horizontal section. The purpose is to control the material in the inner side of the protective cover baffle along the horizontal overflow line of the space at the height of 10mm. When the material rotates to the head position, it can fall into the hopper as far as possible.
2.4 Structure treatment of protective cover head near the center line of sprocket In order to avoid spilling and leaking materials between protective cover and chain plate wing plate at the head, sprinkling storage device should be set up at the head of protective cover to make it return to the main hopper.
2.5 To deal with the structure of materials with too much viscosity too much material stick to the return chain plate due to the treatment principle is as follows:) For the transport Angle level or Angle less than 10 heavy plate, on the bearing surface of the chain plate to remove a variety of rib plate, groove, bolt anti-wear protection plate, so that the bearing surface as smooth as possible; An elastic cleaner is set at the appropriate position near the head of the chain plate to the return journey. The installation position should be moved back as far as possible so that the materials swept away by the cleaner can be returned to the main hopper.
3. We study and analyze the structure design of heavy plate body to avoid material spill and leakage as far as possible, so as to improve the reliability of operation. Can change the structure of the chain plate shape, size, etc., improve the coordination between each part, design cleaning device, etc., to reduce the spill leakage. The above method has achieved good effect in practice and has reference to similar problems of apron feeder for sale. mouth
