Ultrafine grinding equipment including cleaning system

Abstract

In order to solve the technical problems of complicated internal cleaning operation, pollution and incomplete cleaning of ultrafine pulverizing equipment in the prior art, the present invention discloses an ultrafine pulverizing equipment including a cleaning system, including a feeder, a pulverizer, a material separator, a dust collector, an induced draft fan, a conveying pipeline, and also including a dust collector, an air separator, a compressor, a solenoid valve, a cleaning nozzle, a ventilation hose, and a cleaning control device; the equipment disclosed in the present invention can use a pulse purge function after production or during production, and the purge of the main engine cavity and pipelines inside the system can be completed in just a few minutes after production. The unique cavity tangent and axial multi-point air inlet mode allows the airflow to form a turbulent flow inside the equipment, forcing the material to be suspended and then discharged with the wind. The structure is simple and the design is reasonable. On the basis of the existing pulverizing equipment, the automatic cleaning of the dust inside the equipment can be achieved through modification and installation, and the cleaning is thorough and efficient.

Description

Technical Field

[0001] The invention relates to the technical field of equipment cleaning, and more particularly to an ultrafine grinding device comprising a cleaning system. Background Art

[0002] Ultrafine grinding equipment for materials will generate a large amount of dust during the production process. Since the grinding equipment is sealed and has a complex structure, dust will remain inside the equipment, especially in the dead corners and inner walls of the equipment's conveying pipelines, where fine materials are likely to remain and form lumps. If it is not cleaned thoroughly for a long time, it will affect the quality of the next batch of products.

[0003] At present, domestic and foreign manufacturers of ultrafine grinding products mostly clean up after production is completed. They need to completely open the main machine crushing chamber and dismantle the pipeline for cleaning. In addition, due to the complex structure of the main machine cavity and many dead corners, there are no suitable tools for thorough cleaning, which makes the operation extremely inconvenient and easily causes dust pollution to the production site.

[0004] In summary, a new type of cleaning device is needed that can clean the residual micropowder inside the equipment without opening the equipment, effectively solving the problem of inconvenient cleaning inside the ultrafine grinding equipment. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an ultrafine grinding equipment including a cleaning system in view of the shortcomings of the prior art. The ultrafine grinding equipment has a simple structure and a reasonable design. On the basis of the existing grinding equipment, it can realize automatic cleaning of the dust inside the equipment through modification and addition, thereby avoiding incomplete cleaning, improving the cleaning efficiency and ensuring the cleanliness of the equipment when the next batch of products is produced.

[0006] At present, the disadvantages of the existing technology for cleaning ultrafine grinding equipment are: 1) the cleaning interval is long. In order to meet production needs, general manufacturers only clean the equipment once a day after completing production; 2) the cleaning process is complicated and polluting. The equipment needs to be opened and the inside of the equipment needs to be purged and cleaned. The operation process is cumbersome and the dust during cleaning will pollute the production workshop environment; 3) the cleaning is not thorough. Since only the main part of the equipment can be opened, the conveying pipeline and dead corners can only be simply purged, resulting in incomplete cleaning; 4) it brings inconvenience to the production of frequent changes in varieties.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] An ultrafine grinding device including a cleaning system includes a feeder, a grinder, a material separator, a dust collector, an induced draft fan, a conveying pipeline, a dust collector, an air separator, a compressor, a solenoid valve, a cleaning nozzle, a ventilation hose, and a cleaning control device, wherein:

[0009] The feeder, pulverizer, material separator, dust collector and induced draft fan are connected through a conveying pipeline. The induced draft fan is connected to the tail end of the equipment to generate a wind source to drive the material to be transported.

[0010] The compressor is connected to the air separation bag and provides gas and generates pressure in the air separation bag; the compressor and the air separation bag are fixedly installed on the top edge of the dust collector;

[0011] The dust collector is also provided with a plurality of filter bags, which are connected to the air distribution bag and control the air intake through the solenoid valve;

[0012] The cleaning nozzles are arranged parallel to the central axial direction of the grinder; and are arranged perpendicular to the central axial direction of the grinder. When entering the grinder cavity in the perpendicular direction, the cleaning nozzles are inserted obliquely into the cavity at a tangent to the side wall of the outer cavity.

[0013] The cleaning nozzles are arranged parallel to the central axial direction of the material separator; and are arranged perpendicular to the central axial direction of the material separator. When entering the cavity of the material separator perpendicularly, the cleaning nozzles are inserted obliquely into the cavity at a tangent to the side wall of the outer cavity.

[0014] The cleaning nozzles are arranged perpendicular to the central axial direction of the conveying pipeline and enter the conveying pipeline along the diameter direction of the conveying pipeline; and are arranged along the opposite direction of the material flow and enter the conveying pipeline at an angle of 45° to the central axis of the conveying pipeline.

[0015] One end of the ventilation hose is connected to the air distribution bag, and the other end is connected to each cleaning nozzle. The cleaning control device controls the opening and closing of the air distribution bag and the ventilation hose;

[0016] Preferably, in the above-mentioned ultrafine grinding equipment including a cleaning system, the wind source provided by the induced draft fan and the compressor is an inert gas such as nitrogen after the air is purified;

[0017] Preferably, in the above-mentioned ultrafine grinding equipment including a cleaning system, the material separator includes a primary separator and a secondary cyclone separator;

[0018] Preferably, in the above-mentioned ultrafine grinding device including a cleaning system, the compressor can be replaced by a gas cylinder;

[0019] Preferably, in the above-mentioned ultrafine grinding equipment including a cleaning system, the induced draft fan is connected to a muffler.

[0020] In the above-mentioned ultrafine grinding equipment including a cleaning system, the material inside the equipment is transported with the airflow of the induced draft fan. After being crushed by the grinder, it is screened for coarseness and fineness through the material separator. In order to ensure sufficient screening of the material, a primary separator and a secondary cyclone separator are selected. The finer material is initially screened through the primary separator and then enters the secondary cyclone separator for secondary coarse and fine screening. In the process of conveying the material from the primary separator to the secondary cyclone separator, it will remain in the dead corner of the right-angle conveying bend at the other end of the separation blade of the primary separator, and it will also remain on the inner wall of the conveying pipeline. If the equipment is idle for a long time after production, fine materials will remain on the inner wall of the main cavity and the inner wall of the conveying pipeline and form lumps, which will affect the quality of the next batch of products.

[0021] The dust collector of the pulverizer is equipped with dust filter bags to prevent dust from being discharged to the outside with the induced draft fan during production and causing pollution. An air separator is installed on the external side wall of the dust collector, which mainly controls the pulse backblowing of the filter bag through the solenoid valve. After the production is completed, when the cleaning program is started, the filter bag is cleaned, so that the dust attached to the filter bag falls into the dust collector, and finally the dust is collected and processed by the dust collector.

[0022] One end of the ventilation hose in the cleaning system is connected to the air outlet of the air distribution bag, and the other end is divided into several branch pipelines and connected to the outer wall of the crusher, material separator, and conveying pipeline through cleaning nozzles. There are two ways to connect the cleaning nozzle to the main cavity (i.e., crusher and material separator): one is to set several nozzles parallel to the central axial direction of the main cavity; the other is to set several nozzles perpendicular to the central axial direction of the main cavity, wherein when entering in the vertical direction, the nozzles are inserted obliquely into the cavity tangent to the side wall of the outer cavity of the main cavity. There are two ways to connect the cleaning nozzle to the conveying pipeline: one is to set several nozzles perpendicular to the central axial direction of the conveying pipeline and enter the interior of the conveying pipeline along the diameter direction of the conveying pipeline; the other is to set several nozzles along the opposite direction of the material and enter the interior of the conveying pipeline at a 45° angle with the central axis of the conveying pipeline. The advantage of the above design is that the incoming cleaning wind makes a spiral motion along the inner wall of the internal cavity of the equipment, forming a turbulent flow with the conveying wind direction inside the system, producing a stirring effect, and can thoroughly clean the fine particles attached to the inner wall of the equipment.

[0023] The compressor is responsible for supplying air to the air distribution bag. The function of the air distribution bag is to temporarily store gas. The solenoid valve mainly controls the air distribution bag to supply air to the filter bag in the dust collector. The solenoid valve is opened instantly in a pulsating manner. The air in the air distribution bag will quickly enter the filter bag due to pressure. The compressor can be replaced by a gas cylinder.

[0024] The cleaning control device mainly controls the switch between the gas distribution bag and the ventilation hose. When the control is turned on, the gas enters the cleaning ventilation hose from the gas distribution bag. The cleaning time interval can be set manually or automatically.

[0025] If it is necessary to protect the product, purified air or inert gas such as nitrogen can be used as the wind source for purging.

[0026] It can be seen from the above technical scheme that, compared with the prior art, the present invention discloses an ultrafine grinding equipment including a cleaning system, which can use a pulsed purge function after production or during production. It only takes a few minutes after production to complete the purge of the main engine cavity and the classifier cavity inside the system; the unique cavity tangent and axial multi-point air intake methods cause the airflow to form turbulence inside the equipment, forcing the material to be suspended and then transported out with the air, with a cleaning coverage rate of 100%. Therefore, the present invention can solve the technical problems in the prior art that the equipment has a long cleaning interval, a complex cleaning process, pollution, and incomplete cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0029] Figure 2 It is a top cross-sectional view of a dust collector and an air separation bag in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the air intake mode of the delivery pipeline in the embodiment of the invention;

[0031] Figure 4 This is a schematic diagram of the air intake mode of the main engine cavity in an embodiment of the invention;

[0032] in:

[0033] 1 is a feeder, 2 is a crusher, 3 is a material separator, 4 is an induced draft fan, 5 is a conveying pipeline, 6 is a dust collector, 7 is an air distribution bag, 8 is a compressor, 9 is a solenoid valve, 10 is a cleaning nozzle, 11 is a ventilation hose, 12 is a cleaning control device, 13 is a filter bag, 31 is a primary separator, 32 is a secondary cyclone separator, and 41 is a silencer. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] Example:

[0040] Please see attached Figure 1-4 The embodiment of the present invention discloses an ultrafine grinding device including a cleaning system, including a feeder 1, a grinder 2, a material separator 3, an induced draft fan 4, a conveying pipeline 5, a dust collector 6, an air separator 7, a compressor 8, a solenoid valve 9, a cleaning nozzle 10, a ventilation hose 11, and a cleaning control device 12, wherein:

[0041] The feeder 1, the crusher 2, the material separator 3, the dust collector 6, and the induced draft fan 4 are connected through a conveying pipeline 5. The induced draft fan 4 is connected to the tail end of the equipment to generate a wind source to drive the material to be transported;

[0042] The compressor 8 is connected to the gas separation bag 7 and provides gas and generates pressure in the gas separation bag 7; the compressor 8 and the gas separation bag 7 are fixedly mounted on the top edge of the dust collector 6;

[0043] The dust collector 6 is also provided with a plurality of filter bags 13, which are connected to the air distribution bag 7 and control the air intake through the solenoid valve 9;

[0044] The cleaning nozzles 10 are arranged parallel to the central axial direction of the grinder 2; and are arranged perpendicular to the central axial direction of the grinder 2. When entering the cavity of the grinder 2 in the perpendicular direction, the cleaning nozzles 10 are inserted obliquely into the cavity at a tangent to the side wall of the outer cavity;

[0045] The cleaning nozzles 10 are arranged parallel to the central axial direction of the material separator 3; and are arranged perpendicular to the central axial direction of the material separator 3. When entering the cavity of the material separator 3 in the perpendicular direction, the cleaning nozzles 10 are inserted obliquely into the cavity tangent to the side wall of the outer cavity;

[0046] The cleaning nozzles 10 are arranged perpendicular to the central axial direction of the conveying pipeline 5 and enter the conveying pipeline 5 along the diameter direction of the conveying pipeline 5 in a plurality of places; and are arranged along the opposite direction of the material flow and enter the conveying pipeline 5 at an angle of 45° to the central axis of the conveying pipeline 5 in a plurality of places;

[0047] One end of the ventilation hose 11 is connected to the air distribution bag 7 , and the other end is connected to each cleaning nozzle 10 . The cleaning control device 12 controls the opening and closing of the air distribution bag 7 and the ventilation hose 11 .

[0048] Among them, the feeder 1, the pulverizer 2, the material separator 3, the induced draft fan 4, and the conveying pipeline 5 constitute the pulverizing system of the ultrafine pulverizing equipment. The material enters the pulverizer 2 through the feeder 1. After being pulverized, the material is attracted by the induced draft fan 4 and enters the material separator 3 through the conveying pipeline 5 for separation processing.

[0049] In addition, the dust collector 6, the air separator 7, the compressor 8, the solenoid valve 9, the cleaning nozzle 10, the ventilation hose 11, and the cleaning control device 12 constitute the cleaning system of the ultrafine grinding equipment. The main dust is processed by the dust collector 6. In order to prevent the dust in the dust collector 6 from entering the induced draft fan 4 and causing pollution, a plurality of filter bags 13 are arranged inside the dust collector 6. The filter bag 13 is preferably a columnar structure. During the dust removal process, the dust will adhere to the outer surface of the filter bag 13; the air separator 7 provides an air source through the compressor 8 or the gas cylinder. When the solenoid valve 9 is pulsed open and closed, pulse blowing is performed to the filter bag at an extremely fast blowing speed, so that the dust attached to the filter bag around the filter bag re-enters the dust collector 6 and then falls into the dust collection device below.

[0050] In addition to the dust collector 6 that cleans most of the dust, a number of cleaning nozzles 10 are arranged along the axial direction on the cavities of the crusher 2, the material separator 3 and the conveying pipeline 5. The cleaning nozzles 10 enter the cavity in two blowing modes, and the air in the air separator 7 is controlled by the cleaning control device 12 to perform intermittent blowing and cleaning on the inside of the cavity.

[0051] In order to further optimize the above technical solution, there are two ways to connect the cleaning nozzle 10 to the main cavity (i.e., the crusher 2 and the material separator 3): one is to set several nozzles parallel to the central axial direction of the main cavity; the other is to set several nozzles perpendicular to the central axial direction of the main cavity, wherein when entering in the vertical direction, the nozzles are inserted obliquely into the cavity tangent to the side wall of the outer cavity of the main cavity. There are two ways to connect the cleaning nozzle 10 to the conveying pipeline 5: one is to set several nozzles perpendicular to the central axial direction of the conveying pipeline 5 and enter the conveying pipeline 5 along the diameter direction of the conveying pipeline 5; the other is to set several nozzles in the opposite direction of the material flow and enter the conveying pipeline 5 at a 45° angle to the central axis of the conveying pipeline 5. The advantage is that the incoming cleaning wind makes a spiral motion along the inner wall of the internal cavity of the equipment, forms a turbulent flow with the conveying wind direction inside the system, produces a stirring effect, and can thoroughly clean the fine particles attached to the inner wall of the equipment.

[0052] In order to further optimize the above technical solution, the air source provided by the induced draft fan 4 and the compressor 8 is purified air. The air source itself may contaminate the material. When high cleanliness is required, the air source is purified air or inert gas such as nitrogen to meet the requirements of different cleanliness of the material.

[0053] In order to further optimize the above technical solution, the material separator 3 includes a primary separator 31 and a secondary cyclone separator 32. The material separator 3 is used to screen the crushed material, and two-stage separation or multi-stage separation is selected to achieve the subdivision of materials of different coarseness and fineness.

[0054] In order to further optimize the above technical solution, the compressor 8 can be replaced by a gas cylinder. The compressor 8 and other gas source providing devices such as gas cylinders can provide gas sources for the gas distribution bag.

[0055] In order to further optimize the above technical solution, the induced draft fan 4 is connected to a silencer 41. The induced draft fan 4 generates a lot of noise when in operation, and one or more silencers 41 are added to achieve the purpose of reducing the noise.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An ultrafine grinding device including a cleaning system, comprising a feeder (1), a grinder (2), a material separator (3), an induced draft fan (4), and a conveying pipeline (5), characterized in that: It also includes a dust collector (6), an air distribution bag (7), a compressor (8), a solenoid valve (9), a cleaning nozzle (10), a ventilation hose (11), and a cleaning control device (12), wherein: The feeder (1), the pulverizer (2), the material separator (3), the dust collector (6), and the induced draft fan (4) are connected via a conveying pipeline (5); the induced draft fan (4) is connected to the rear end of the equipment to generate a wind source to drive the material to be conveyed; The compressor (8) is connected to the gas separation bag (7) and provides gas to the gas separation bag (7) and generates pressure; the compressor (8) and the gas separation bag (7) are fixedly installed on the top edge of the dust collector (6); The dust collector (6) is also provided with a plurality of filter bags (13), which are connected to the air separation bag (7) and control the air intake through the solenoid valve (9); A plurality of cleaning nozzles (10) are arranged parallel to the central axial direction of the pulverizer (2); a plurality of cleaning nozzles (10) are arranged perpendicular to the central axial direction of the pulverizer (2), and when entering the cavity of the pulverizer (2) in the perpendicular direction, the cleaning nozzles (10) are inserted obliquely into the cavity at a tangent to the side wall of the outer cavity; A plurality of cleaning nozzles (10) are arranged parallel to the central axial direction of the material separator (3); a plurality of cleaning nozzles (10) are arranged perpendicular to the central axial direction of the material separator (3), and when entering the cavity of the material separator (3) in the perpendicular direction, they are inserted obliquely into the cavity at a tangent to the side wall of the outer cavity; A plurality of cleaning nozzles (10) are arranged perpendicular to the central axial direction of the conveying pipeline (5) and enter the conveying pipeline (5) along the diameter direction of the conveying pipeline (5); a plurality of cleaning nozzles (10) are arranged along the opposite direction of the material flow and enter the conveying pipeline (5) at an angle of 45° with the central axis of the conveying pipeline (5); One end of the ventilation hose (11) is connected to the air distribution bag (7), and the other end is connected to each cleaning nozzle (10). The cleaning control device (12) controls the opening and closing of the air distribution bag (7) and the ventilation hose (11).

2. The ultrafine grinding device comprising a cleaning system according to claim 1, characterized in that: The wind source provided by the induced draft fan (4) and the compressor (8) is nitrogen.

3. The ultrafine grinding device comprising a cleaning system according to claim 1, characterized in that: The material separator (3) comprises a primary separator (31) and a secondary cyclone separator (32).

4. An ultrafine grinding device comprising a cleaning system according to any one of claims 1 to 3, characterized in that: The induced draft fan (4) is connected to a muffler (41).

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