CN105521855A - Raymond mill device with convenient-to-disassemble fan - Google Patents

Abstract

The invention discloses a Raymond mill device which is easy to disassemble with a fan. The fan, the Raymond mill, a cyclone separation discharger and a return air duct constitute an airflow circulation mill powder discharge system; an equal pressure exhaust branch pipe is connected to the upper end of the cyclone pipe , a plurality of cyclones are arranged in the cyclone pipe, the lower end of the cyclone pipe is connected to the cyclone separator tangentially, the cyclone separator discharges the purified air and is immersed under the liquid level of the circulating water pool, and the circulating water pool is connected to the upper end of the cyclone pipe; the blades of the induced draft fan impeller are arranged as The impeller shaft is radially and center-symmetrically radial, which can use centrifugal force to clean up dust in time to avoid safety accidents. The invention is not easy to cause mineral dust leakage, and it greatly improves the disassembly and assembly technology of the induced draft fan, so that it can simply eliminate the pressure on the end surface of the screw shaft shoulder by similar nut parts during disassembly, and effectively solve the problem of the thread assembly of the induced draft fan. The problem of continuous automatic locking and difficult disassembly under load is especially suitable for the convenient disassembly of large fans after the thread is locked, and the effect is particularly remarkable.

Description

The fan is easy to disassemble the Raymond mill device

technical field

The invention relates to a Raymond mill device, specifically referring to a Raymond mill device in which the fan does not accumulate dust and is easy to disassemble and overhaul.

Background technique

Raymond mill is a kind of equipment widely used in ore crushing and grinding. Due to its strong adaptability and high cost performance, it has become the first choice for ore crushing and grinding. Raymond mill is an air flow internal circulation type powder output, due to the expansion of heated gas during the crushing process, if the ore has a high water content or water enters, not only will the output of the powder be reduced, but also a large amount of gas will be caused by the vaporization of the water. swell. Therefore, all Raymond mills are equipped with pressure equalizing exhaust branch pipes to input excess gas into the bag filter for purification and discharge, so as to avoid dust leakage caused by positive pressure in the crushing system, but when the humidity of the bag is high, dust is easy to adhere to the inner surface , resulting in increased ventilation resistance, will also cause system positive pressure, leakage of gas containing a large amount of dust, and worsen the working environment. Therefore, it is of great significance to improve the working environment and realize the recovery of ore dust by keeping the equal pressure exhaust branch pipe of Raymond mill unblocked and realizing dust removal and purification and ore powder recovery at the same time.

The fan is the key equipment of the Raymond mill. The induced draft fan is generally a centrifugal fan. The continuous, stable and reliable operation of the induced draft fan is very important for the Raymond mill. Because most of the places where the Raymond mill is used contain a certain amount of dust, the induced When the fan is working, when the airflow passes through the high-speed rotating fan impeller, due to the centrifugal separation, the dust particles will separate from the airflow phase and deposit on the fan impeller.

The impeller speed of the induced draft fan is generally high. As long as there is a small amount of dust in the airflow, more dust will accumulate after a long time of work, thereby changing the balance of the impeller rotation of the induced draft fan. If the impeller of the induced draft fan has no self-cleaning effect on the dust and is not cleaned in time, It will accumulate more and gradually change the static and dynamic balance of the induced draft fan impeller, resulting in vibration. Once the partly hardened dust is shaken off, it will immediately leave the dynamic rotation balance of the induced draft fan, and then generate strong vibration, which may cause serious personnel and equipment safety accidents.

On the other hand, the structure of ordinary fans is generally that one end of the fan shaft is the fan impeller, and the other end is the power input end of the motor, often a coupling. Since fans generally operate continuously for a long time, the bearings are easily damaged. To replace the bearings, it is generally necessary to disassemble the fan impeller and the coupling at the other end, but the assembly of the existing fan shaft, fan impeller, and coupling is a typical shaft , Hole interference fit, and carry out load transmission through keys. Interference fit usually requires high machining accuracy, and the combination of key connection to realize the torque bearing function, assembly generally requires a large extrusion force, if there is no professional equipment and tools, disassembly and assembly are very inconvenient.

Threaded connection is easy to process, convenient to assemble, and also has the function of one-way bearing torque. Therefore, if threaded connection can be used in the connection between the fan shaft and the hole to realize transmission, making it easier to assemble and disassemble, it will be more convenient. High practical value and market application prospect. In the actual assembly of shafts and holes with transmission threads, in order to achieve large load-bearing functions, the size of the threaded shafts and matching nut-like components are relatively large, and it is often easy and convenient to screw in during assembly, and It can realize automatic and continuous locking of bearing capacity during use, so it is very reliable. However, when disassembling, the assembly is often very tight and disassembly is very difficult. It is particularly important to realize simple and easy disassembly under such conditions.

Therefore, if a Raymond mill device can be designed so that the fan can not only automatically clean the dust, but also be disassembled and overhauled very conveniently, it will be of great significance for promoting the technological progress of the Raymond mill device and preventing safety accidents.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a fan that can not only automatically clean up dust, but is not easy to cause mineral powder dust leakage, but also is very convenient for disassembly and maintenance.

In order to overcome the deficiencies in the prior art, the present invention takes the following technical solutions:

A Raymond mill device that is easy to disassemble with a fan, including a Raymond mill, a cyclone separator discharger, a fan and a pressure-equalizing exhaust branch pipe, characterized in that: the fan, Raymond mill, cyclone separator discharger and return air The pipe constitutes the airflow circulation milling and discharging system; the equal pressure exhaust branch pipe is connected to the upper end of the cyclone pipe, and a plurality of cyclones are arranged in the cyclone pipe, and the lower end of the cyclone pipe is connected to the cyclone separator tangentially, and the exhaust port on the cyclone separator discharges the purified air. The lower nozzle is immersed in the liquid surface of the circulating water pool to realize liquid seal discharge, and the circulating water pool is connected to the upper end of the cyclone pipe through the circulating pump and the circulating water pipe; the induced draft fan includes the fan impeller, bearing, fan shaft and coupling, and the coupling and the fan The shaft and the fan impeller and the fan shaft are assembled with threads, and the thread rotation is the direction of automatic locking with the work and load; the fan impeller is connected with the fan shaft by a similar nut and the impeller flat washer, copper-lead torsion composite pad is pressed tightly, The fan impeller and one end of the fan shaft form a threaded rigid connection; the clamp part is inserted into the other end of the fan shaft, and then the flat washer of the coupling is inserted into the fan shaft, and then screwed into the coupling similar to a nut, and then locked properly. The clamp part and the coupling similar to the nut form a rigid connection with the other end of the fan shaft; the copper-lead torsion composite pad is a copper pad processed by stamping, with fins on its periphery, and then composited easily on both sides of the copper pad. Molten lead alloy washer; the clamp parts are composed of clamps, clamp ears, clamp pads and bolts. The cross section of the clamp is wedge-shaped, and the clamp body is composed of two semi-circular rings. The holes are used to enhance the axial elasticity, and the two ends of the clamp pad are plane structures, which are convenient for matching with the shaft shoulder.

The impeller of the induced draft fan includes an impeller back plate, an impeller panel, main blades and auxiliary blades. The main blades are in the shape of a flat plate and are arranged in a radial and centrally symmetrical radial shape of the impeller shaft; the main blades are connected to the impeller panel and welded to the impeller back plate. The main body of the impeller; the impeller panel is provided with an air inlet; the back plate of the impeller and the inner edge of the main blade are connected firmly with the fan shaft seat through welding, and the fan shaft seat is connected with the fan shaft through the shaft hole; Both the plate and the main blade form a triangular structure.

An isolated temporary storage barrel is provided at the inlet where the return air duct is connected to the fan, and the isolated temporary storage barrel is provided with a gravity material door.

A powder material temporary storage barrel is provided under the gravity material door, and a powder material temporary storage barrel is provided with a valve and a discharge gate.

When the equipment is working, the fan, Raymond mill, cyclone separator discharger and return air duct constitute an airflow circulation milling discharge system. In practical applications, the return air duct is particularly easy to deposit ore powder. Once a large amount of hardened ore powder falls off and falls It is easy to rush into the fan and damage the equipment, so the isolation temporary storage bucket is designed to temporarily store the hardened and fallen mineral powder at the fan inlet, and at the same time realize the gas pressure isolation. After the isolated temporary storage barrel has a lot of material, the gravity material door will automatically open and close, and the ore powder will be discharged into the powder material temporary storage barrel. According to the situation, the discharge gate can be operated to discharge the ore powder for use, completely eliminating the hidden danger of abnormal damage to the fan.

Both the pressure equalizing exhaust branch pipe and the circulating water pipe are connected to the upper end of the cyclone pipe. A cyclone is installed in the cyclone pipe in an appropriate amount. The water vapor is mixed in the cyclone pipe and rotates down, so that the dust is captured into the cyclone separator, and the exhaust port on the cyclone separator discharges the purified air. The lower nozzle is immersed under the liquid surface of the circulating water pool to realize liquid seal discharge, the mineral powder is deposited in the circulating water pool, and the surface clarified water is transported to the upper end of the cyclone tube for spraying through the circulating water pump. The airflow resistance of the cyclone is much smaller than that of the bag filter, which will not cause positive pressure in the system; at the same time, the multi-stage cyclone separation can capture the dust more thoroughly, and the cleanliness of the exhaust airflow is high, which greatly improves the working environment of ore crushing and grinding.

When the induced draft fan impeller of the present invention is used, since the main and auxiliary blades of the fan are radially and center-symmetrical, when the blades rotate at high speed, the surface of the blades has a strong centrifugal surface self-cleaning effect under the action of strong centrifugal force, dust cannot adhere and rapid centrifugal separation can be realized , will not affect the dynamic and static balance of the impeller, suitable for large flow, high power, dust-proof airflow delivery. The impeller face plate, back plate, main blades and auxiliary blades all form a triangular axial radial center symmetrical structure, which makes the fan back plate and the face plate connected to it resist relative torsion and strong extrusion rigidity, which can completely eliminate the connection of the main blade of the fan to the back. The fatigue fracture caused by the load-bearing bending moment at the root of the plate can obtain higher strength even if it is made of thinner plate, ensuring stable and reliable use. The impeller design of this structure is especially suitable for thin plate production, which is convenient for saving materials and is beneficial Lightweight equipment.

When the induced draft fan needs to be disassembled and overhauled, using the innovatively designed copper-lead torsion composite pad and clamp parts, through convenient operation, the pressure on the end face of the screw shaft shoulder by similar nut parts can be easily eliminated. At this time, the nut and screw parts are in the Unloading the suspended state, the disassembly becomes as simple and convenient as the threaded assembly. It is used to solve the technical problem that the threaded assembly is continuously and automatically locked under the load and is not easy to disassemble. In the field of threaded locking of large fan shaft components, such a function appears Particularly important.

When the impeller of the induced draft fan needs to be disassembled but it is very difficult, use an oxyacetylene flame to heat the copper pad in the middle of the copper-lead torsion composite gasket. Due to the excellent heat transfer of copper, the melting point of lead alloy is low. , After heating, the lead alloy is heated and melted, and the compression tension between the fan impeller and the shaft shoulder step is completely eliminated, so that the fan impeller is in a completely suspended state, which is especially easy to disassemble.

When the coupling parts like nuts need to be disassembled but it is very difficult, use a wrench to remove the bolts. Because the two semi-circular hoop bodies have a quick split structure and the cross section of the hoop body is wedge-shaped, you can use a flat end The tool is easily pried open from the joint of the two clamp ears, the clamp is easily disassembled, and the clamp pad returns to the loose state, so that the tension force after locking the coupling part and the shaft shoulder end surface is completely eliminated, so that similar The coupling part of the nut is in a completely suspended state and is particularly easy to disassemble.

Compared with the prior art, the beneficial effect of the present invention is that the disassembly and assembly technology of the induced draft fan has been greatly improved, which can effectively solve the problem that the thread assembly of the induced draft fan is continuously and automatically locked under load and is not easy to disassemble, and is especially suitable for large-scale fan threads. The effect of convenient disassembly after locking is particularly remarkable, mainly reflected in the following points:

1. Do not change the characteristics of thread assembly, only need to add copper-lead alloy composite pad, clamp pad and clamp, low cost and easy to realize; 2. Copper-lead alloy composite pad, clamp pad can play a good role in stress decomposition, Effectively enhance the load-carrying capacity of the structure, and the oval hole of the clamp pad can effectively enhance the axial elasticity of the clamp pad; 3. It is very clever to use the hot-melt design of the copper-lead alloy composite pad and the assembly and disassembly of the clamp to realize the axial fittings. The tension and relaxation function can effectively and quickly eliminate the tension force similar to nut locking, and realize the fast and convenient disassembly of particularly tight nut-like parts threaded assembly components; 4. The wedge-shaped assembly structure of the clamp pad and the clamp is easy to repeat and quickly Assembly and disassembly use.

Description of drawings

Fig. 1 is the plane structure schematic diagram of the present invention

Fig. 2 is a three-dimensional structural schematic diagram of the shaft system of the induced draft fan.

Figure 3 is a schematic plan view of the shaft system of the induced draft fan.

Fig. 4 is a schematic perspective view of the three-dimensional structure of the impeller of the induced draft fan.

Fig. 5 is a schematic cross-sectional structure diagram of an induced draft fan impeller.

Fig. 6 is a schematic structural diagram of a copper-lead torsion composite pad.

Fig. 7 is a schematic diagram of the assembly structure of the clamp parts.

Fig. 8 is a schematic diagram of the disassembled structure of the clamp parts.

Fig. 9 is a schematic structural view of the clamp pad.

Fig. 10 is a schematic diagram of a three-dimensional structure of a cyclone.

Each label in the figure means:

A. Fan; C. Cyclone; 1. Raymond mill; 2. Cyclone separation discharger; 3. Return air duct; 4. Pressure equalization exhaust branch pipe interface; 5. Isolation temporary storage barrel; 6. Gravity material Door; 7. Valve; 8. Temporary powder storage barrel; 9. Discharge gate; 10. Cyclone pipe; 11. Cyclone separator; 12. Circulating pump; 13. Circulating water pipe; 14. Equalizing exhaust branch pipe; 31 , main blade; 32, auxiliary blade; 33, impeller air inlet; 34, fan shaft seat; 36, shaft hole; 37, impeller back plate; 38, impeller panel; 41, induced draft fan impeller; 42, impeller flat washer; 43 , copper-lead torsion compound pad; 44, bearing; 45, fan shaft; 46, clamp parts; 47, coupling flat washer; 48, coupling; 51, copper pad and fin; 52, fusible lead alloy Washer; 61, clamp; 62, clamp ear; 63, clamp pad; 64, oval hole; 65, bolt.

detailed description

Now in conjunction with accompanying drawing, the present invention is described in further detail.

As shown in Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, Figure 8, Figure 9 and Figure 10, the fan is easy to disassemble the Raymond mill device, including Raymond mill 1, cyclone separation Discharge device 2, fan A and equal pressure exhaust branch pipe 14, fan A, Raymond mill 1, cyclone separation discharge device 2 and return air duct 3 constitute an airflow circulation mill powder discharge system; equal pressure exhaust branch pipe 14 Connect the upper end of the cyclone tube 10, a plurality of cyclones C are arranged in the cyclone tube 10, the lower end of the cyclone tube 10 is tangentially connected to the cyclone separator 11, the upper exhaust port of the cyclone separator 11 discharges the purified air, and the lower nozzle is immersed in the liquid surface of the circulating pool Realize the discharge of liquid seal, the circulating pool is connected to the upper end of the cyclone pipe 10 through the circulating pump 12 and the circulating water pipe 13; Fan shaft 45 and fan impeller 41 and fan shaft 45 all adopt threaded assembly, and the screw thread direction is the direction that automatically locks with work and bearing; The lead torsion composite pad 43 is pressed tightly, and the fan impeller 41 forms a threaded rigid connection with one end of the fan shaft 45; the clamp part 46 is inserted into the other end of the fan shaft 45, and then the coupling flat washer 47 is inserted into the fan shaft 45, and then screwed into The coupling 48 similar to a nut is properly locked, so that the clamp part 46 and the coupling 48 similar to a nut form a rigid connection with the other end of the fan shaft 45; the copper-lead torsion composite pad 43 is stamped There are fins 51 on the periphery of the copper pad, and fusible lead alloy washers 52 are compounded on both sides of the copper pad; the clamp part 46 is composed of a clamp 61, a clamp ear 62, a clamp pad 63 and a bolt 65 , the cross-section of the clamp 61 is wedge-shaped, and consists of two semi-circular clamp bodies to form a split structure. The clamp pad 63 has an oval hole 64 to enhance axial elasticity. Planar fit, the clamp uses the bolt 65 to pass through the hole on the clamp ear 62, and is assembled on the clamp pad 63 to become one.

The induced draft fan impeller 41 includes an impeller back plate 37, an impeller panel 38, a main blade 31 and an auxiliary blade 32. The main blade 31 is a flat plate shape and is arranged in a radial and centrally symmetrical radial shape of the impeller shaft; the main blade 31 is connected to the impeller panel 38 and welded with the impeller back plate 37 to form the main body of the impeller; the impeller face plate 38 is provided with an air inlet 33, the impeller back plate 37 and the inner edge of the main blade 31 are connected to the fan shaft 45 by welding to form a solid body, and the fan shaft seat 34 passes through the shaft hole 36 is matched with the fan shaft 45; the fan auxiliary blade 32, the impeller panel 38, the back plate 37, and the main blade 31 all form a triangular structure.

An isolated temporary storage barrel 5 is provided at the entrance where the return air duct 3 is connected to the fan A, and the isolated temporary storage barrel 5 is provided with a gravity material door 6 .

A powder temporary storage barrel 8 is provided below the gravity material door 6, and the powder temporary storage barrel 8 is provided with a valve 7 and a discharge gate 9.

When the equipment is working, fan A, Raymond mill 1, cyclone separator discharger 2 and return air duct 3 constitute an airflow circulation mill powder discharge system. In practical applications, return air duct 3 is particularly easy to deposit ore powder. If a large amount of powder falls away and falls, it is easy to rush into the fan A and damage the equipment. Therefore, an isolation temporary storage bucket 5 is designed to temporarily store the hardened and fallen mineral powder at the inlet of the fan, and at the same time realize gas pressure isolation. After the isolation temporary storage barrel 5 has a lot of material, the gravity material door 6 will automatically open and close, and the ore powder will be discharged into the powder temporary storage barrel 8. According to the situation, the discharge gate 9 can be operated to discharge the ore powder for use, completely eliminating the abnormal damage of the fan hidden dangers.

Both the pressure equalizing exhaust branch pipe 14 and the circulating water pipe 13 are connected to the upper end of the cyclone pipe 10, and an appropriate amount of cyclone C is installed in the cyclone pipe 10, and the water vapor is mixed in the cyclone pipe 10 and rotates down, so that the dust is captured into the cyclone separator 11, and the cyclone separator 11 The upper exhaust port discharges purified air, and the lower nozzle is immersed in the liquid surface of the circulating water pool to realize liquid sealing and discharging. The mineral powder is deposited in the circulating water pool, and the surface clarified water is transported to the upper end of the cyclone tube 10 by the circulating water pump 12 for spraying. The airflow resistance of the cyclone C is much smaller than that of the bag filter, which will not cause positive pressure in the system; at the same time, the multi-stage cyclone separation can capture the dust more thoroughly, and the cleanliness of the exhaust airflow is high, which greatly improves the working environment of ore crushing and grinding.

When the induced draft fan impeller of the present invention is used, since the main and auxiliary blades of the fan are radially and center-symmetrical, when the blades rotate at high speed, the surface of the blades has a strong centrifugal surface self-cleaning effect under the action of strong centrifugal force, dust cannot adhere and rapid centrifugal separation can be realized , will not affect the dynamic and static balance of the impeller, suitable for large flow, high power, dust-proof airflow delivery. The impeller face plate 38, back plate 37, main blade 31, and auxiliary blade 32 all form a triangular axial radial center symmetrical structure, so that the fan back plate and the face plate connected to it can resist relative torsion and strong extrusion rigidity, which can completely eliminate the fan The fatigue fracture of the root of the main blade connected to the back plate caused by the load-bearing bending moment can obtain higher strength even if it is made of a thinner plate, ensuring stable and reliable use. The impeller design of this structure is especially suitable for thin plate production, which is easy to save material, which is conducive to the lightness of the equipment.

When the induced draft fan A needs to be disassembled and overhauled, the innovatively designed copper-lead torsion composite pad 43 and the clamp part 46 can be used to easily eliminate the pressure on the screw shaft shoulder end surface of the similar nut parts through convenient operation. At this time, the nut and The screw part is in an unloaded and suspended state, and disassembly becomes as simple and convenient as threaded assembly. It is used to solve the technical problem that the threaded assembly is continuously and automatically locked under load and is not easy to disassemble. In the field of threaded locking of large fan shafting components, this function is particularly important.

When the induced draft fan impeller 41 needs to be disassembled but it is very difficult, use oxyacetylene flame to heat the copper pad in the middle of the copper-lead torsion composite gasket with oxyacetylene flame, because the heat transfer property of copper is excellent, and the melting point of lead alloy is relatively high. Low, after heating, the lead alloy is heated and melted, and the compressive tension between the fan impeller 41 and the shaft shoulder step is completely eliminated, so that the fan impeller is in a complete suspended state, which is particularly easy to disassemble.

When the coupling parts like nuts need to be disassembled but it is very difficult, use a wrench to remove the bolts. Because the two semi-circular hoop bodies have a quick split structure and the cross section of the hoop body is wedge-shaped, you can use a flat end The tool is easily pried open from the joint of the two clamp ears, the clamp is easily disassembled, and the clamp pad returns to the loose state, so that the tension force after locking the coupling part and the shaft shoulder end surface is completely eliminated, so that similar The coupling part of the nut is in a completely suspended state and is particularly easy to disassemble.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims (4)

1. A kind of Raymond mill device that blower fan is easy to dismantle, comprises Raymond mill, cyclone separation discharger, blower fan and equal pressure exhaust branch pipe, is characterized in that; Fan, Raymond mill, cyclone separation discharger and return The air duct constitutes the air circulation grinding powder discharge system; the equal pressure exhaust branch pipe is connected to the upper end of the cyclone pipe, and a plurality of cyclones are arranged in the cyclone pipe, and the lower end of the cyclone pipe is connected to the cyclone separator tangentially, and the exhaust port on the cyclone separator discharges the purified Air, the lower nozzle is immersed in the liquid surface of the circulating water pool to realize liquid seal discharge, and the circulating water pool is connected to the upper end of the cyclone pipe through the circulating pump and the circulating water pipe; the induced draft fan includes the fan impeller, bearing, fan shaft and coupling, and the coupling The fan shaft and the fan impeller and the fan shaft are assembled with threads, and the thread rotation is the direction of automatic locking with the work and load; the similar nut of the fan impeller is threaded with the fan shaft and presses the flat washer of the impeller and the copper-lead torsion composite pad Tight, the fan impeller and one end of the fan shaft form a threaded rigid connection; the clamp part is inserted into the other end of the fan shaft, and then the coupling flat washer is inserted into the fan shaft, and then screwed into the coupling similar to the nut, and then lock all Tighten, so that the clamp parts and the coupling similar to the nut form a rigid connection with the other end of the fan shaft; the copper-lead torsion composite pad is a copper pad processed by stamping, with fins on its periphery, and on both sides of the copper pad Composite fusible lead alloy gasket; the clamp parts are composed of clamps, clamp ears, clamp pads and bolts. The elliptical hole is opened to enhance the axial elasticity. The two ends of the clamp pad are plane structures, which are convenient for matching with the shaft shoulder. 2. The Raymond mill device according to claim 1, wherein the fan is easy to be disassembled, wherein the induced draft fan impeller comprises an impeller back plate, an impeller panel, a main blade and an auxiliary blade, and the main blade has a flat shape and Arranged in a radial and center-symmetrical radial shape of the impeller shaft; the main blade is connected to the impeller panel and welded to the impeller back plate to form the main body of the impeller; the impeller panel is provided with an air inlet, and the impeller back plate and the inner edge of the main blade are connected to the fan shaft seat by welding The fan shaft seat is connected with the fan shaft through the shaft hole; the fan auxiliary blade and the impeller panel, back plate, and main blade all form a triangular structure. 3. The Raymond mill device according to claim 1 or 2, wherein the blower is easy to disassemble, and it is characterized in that: the inlet of the connection between the return air duct and the blower is provided with an isolated temporary storage barrel, and the isolated temporary storage barrel is provided with a gravity Materials door. 4. The Raymond mill device according to claim 1 or 2, which is convenient for dismantling of the blower, characterized in that: a powder material temporary storage barrel is provided under the gravity material door, and the powder material temporary storage barrel is provided with a valve and a discharge valve. gate.