Dustproof explosion-proof superfine bamboo powder grinder

Abstract

The utility model belongs to bamboo material deep processing and superfine powder preparation technical field discloses a kind of dust explosion prevention superfine bamboo powder grinding machine, including grinding cylinder and its driving mechanism, grinding cylinder is installed on equipment base by hollow cylinder support, hollow shaft screw feeder is supported and installed in the hollow cylinder support of grinding cylinder by bearing, its feed hopper is installed in hollow cylinder support outside, high-pressure air inlet pipe is connected with high-pressure air knife by hollow cylinder support;The end of grinding cylinder away from hollow shaft screw feeder is equipped with discharge air pipe, discharge air pipe is supported and installed in hollow cylinder support by bearing, the outlet of discharge air pipe is transported to powder collecting bin collection by discharge fan outlet. Grinding machine grinding whole process is closed and inert gas is introduced, cooperate with air supply / leakage explosion valve and multistage cyclone-bag filter separation, effectively inhibit and slow-release dust explosion risk;No dead angle structure and wear-resistant sealing design, reduce accumulation and wear, easy to maintain, reliable operation.

Description

Technical Field

[0001] This utility model belongs to the field of bamboo deep processing and ultrafine powder preparation technology, specifically relating to an ultrafine bamboo powder grinding machine for grinding bamboo fibers to a fineness of over 400 mesh and having dust explosion safety protection function. Background Technology

[0002] As the application fields related to the bamboo industry continue to expand, new products based on high-fineness bamboo powder (such as biodegradable tableware, bamboo-based biomass artificial leather, and high-transmittance biodegradable agricultural film) are developing rapidly, and the market demand for high-fineness bamboo powder (such as 400 mesh or above, corresponding to a particle size of about tens of micrometers) continues to grow.

[0003] Most existing equipment for bamboo powder preparation is derived from mineral grinding or feed processing equipment. Its structure and process pathways are primarily designed for brittle particulate matter, lacking specific adaptation to the physical structural characteristics of bamboo fiber: high toughness, long fiber length, strong anisotropy, and the presence of gum and siliceous components. In practical applications, the following problems commonly exist: (1) Poor adaptability: Fiber entanglement and elastic rebound make it difficult to effectively crush / cut, resulting in high cyclic load and difficulty in achieving a fineness of more than 400 mesh. (2) Low production efficiency and high energy consumption: repeated grinding, over-grinding and agglomeration coexist, the processing unit consumption is high, and the heat accumulation is obvious, which deviates from the carbon reduction goal of "replacing plastic with bamboo"; (3) Prominent safety risks: As the particle size decreases and the uniformity of dust concentration and air mixing increases, the risk of dust explosion increases significantly. However, commonly used equipment generally lacks systematic prevention and control measures such as explosion-proof electrical equipment, static electricity discharge, closed negative pressure, online monitoring, inerting / explosion relief / explosion isolation, which makes it difficult to meet the inherent safety requirements of ultra-fine continuous production. Utility Model Content

[0004] This invention aims to address the problems of low grinding capacity, high energy consumption, and high risk of dust explosion in existing bamboo fiber ultrafine processing, and to provide an ultrafine bamboo powder grinding machine that can achieve continuous and stable production, adjustable grinding fineness (up to and better than 400 mesh), low energy consumption, and dust explosion prevention safety function.

[0005] The technical solution adopted by this utility model is: A dust explosion-proof ultrafine bamboo powder grinder includes a base, a grinding cylinder, and a drive mechanism. The grinding cylinder is mounted on the equipment base via a hollow cylinder support. The hollow shaft screw feeder is installed inside the hollow cylinder support of the grinding cylinder by bearing support. The feed hopper of the hollow shaft screw feeder is installed outside the hollow cylinder support. A baffle is connected to one end of the hollow shaft screw feeder that extends into the grinding cylinder. The baffle is tightly attached to the side wall of one end of the grinding cylinder under the action of the elastic element. The high-pressure air inlet pipe is connected to the high-pressure air knife through a hollow cylindrical support; A discharge duct is provided at the end of the grinding cylinder away from the hollow shaft screw feeder. The discharge duct is installed in the hollow cylinder support by bearing support. The outlet of the discharge duct is transported to the powder collection bin by the discharge fan.

[0006] In some instances, the high-pressure air inlet pipe is supported by bearings within the hollow shaft of the hollow shaft screw feeder and then connected to the high-pressure air knife.

[0007] In some instances, the inlet of the discharge duct is located above the high-pressure air knife.

[0008] In some instances, a supplementary air vent valve is installed at the bottom of the feed hopper.

[0009] In some instances, the powder collection bin includes a gyratory discharge bin, with a fan positioned below the gyratory discharge bin; The airlock is connected to the material collection bin, which is equipped with an exhaust port.

[0010] In some instances, the gyratory hopper is connected in series with a dust collector.

[0011] In some instances, the dust collector is equipped with a shut-off valve, which is connected to the collection bin.

[0012] In some instances, the inlet of the discharge duct is equipped with a discharge valve.

[0013] In some instances, the grinding cylinder is provided with a feed inlet.

[0014] In some instances, the grinding cylinder is provided with a waste outlet.

[0015] In some instances, there are multiple grinding cylinders.

[0016] The above features can be combined arbitrarily as long as they do not conflict.

[0017] The beneficial effects of this utility model are: The grinding mills of some examples of this utility model are fully enclosed during the grinding process and introduce inert gas. Combined with the air supply / explosion relief valve and multi-stage cyclone-bag filter separation, they effectively suppress and mitigate the risk of dust explosion.

[0018] The grinding machine of some examples of this utility model has a dead-angle-free structure and wear-resistant sealing design, which reduces material accumulation and wear, facilitates maintenance, and ensures reliable operation.

[0019] The grinding machines of some examples of this utility model are symmetrically arranged and have interlaced processes, which enable the supporting systems to share resources, save space and investment, and improve system utilization. Attached Figure Description

[0020] Figure 1 The diagram shows the present invention. 1 is a left-hand grinding machine, 2 is a right-hand grinding machine, 3 is an automatic adjustment controller for the equipment, and 4 is a multi-stage rotary feeding and dust removal integrated machine.

[0021] Figure 2 This is a schematic diagram of a grinding machine. 1-1 Grinding cylinder, 1-2 Hollow cylinder support, 1-3 Equipment base, 1-4 Grinding balls, 1-5 Gear drive, 1-6 Hollow shaft screw feeder, 1-7 Feed hopper, 1-8 Air supply and exhaust valve, 1-9 High-pressure air inlet pipe, 1-10 Baffle, 1-11 Clamping spring, 1-12 Lubricating plate, 1-13 High-pressure air knife, 1-14 Discharge valve, 1-15 Discharge air pipe, 1-16 Discharge fan.

[0022] Figure 3 This is a control diagram of the automatic adjustment controller for the equipment. 3-1 Gear drive intermediate relay, 3-2 Hollow shaft screw feeder intermediate relay, 3-3 Valve plate intermediate relay for valve plate sealing the feed hopper, 3-4 Make-up air and explosion relief valve intermediate relay, 3-5 Valve intermediate relay on the inert gas high-pressure air inlet pipe, 3-6 Flexible shaft control discharge valve intermediate relay, 3-7 Discharge fan intermediate relay.

[0023] Figure 4 This is a schematic diagram of a multi-stage rotary feeding and dust removal integrated machine. 4-1 Three rotary feeding bins, 4-2 Dust collector, 4-3 Airlock, 4-4 Collection bin, 4-5 Screw discharger, 4-4-1 Bag exhaust port. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationships based on the directional or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more features.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection or a connection that can communicate with each other; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements, an indirect connection, or an interaction between two elements.

[0029] The following disclosure provides many different implementation methods or examples for different solutions to implement this utility model.

[0030] Reference Figures 1-4 A dust explosion-proof ultrafine bamboo powder grinder includes a base 1-3, a grinding cylinder 1-1, and a drive mechanism. The grinding cylinder 1-1 is mounted on the equipment base 1-3 via a hollow cylinder support 1-2. The hollow shaft screw feeder 1-6 is installed inside the hollow cylinder support 1-2 of the grinding cylinder 1-1 by bearing support. The feed hopper 1-7 of the hollow shaft screw feeder 1-6 is installed outside the hollow cylinder support 1-2. One end of the hollow shaft screw feeder 1-6 extending into the grinding cylinder 1-1 is connected to a baffle 1-10. The baffle 1-10 is tightly attached to the side wall of one end of the grinding cylinder 1-1 under the action of the elastic element 1-11. The high-pressure air inlet pipe 1-9 is connected to the high-pressure air knife 1-13 through the hollow cylinder support 1-2; The grinding cylinder 1-1 is provided with a discharge air pipe 1-15 at the end away from the hollow shaft screw feeder 1-6. The discharge air pipe 1-15 is installed in the hollow cylinder support 1-2 by bearing support. The outlet of the discharge air pipe 1-15 is transported to the powder collection bin by a blower.

[0031] The function of baffle 1-10 is to prevent the grinding media from causing unnecessary damage to the high-pressure air knife 1-13 during grinding, and at the same time to guide the grinding media and the material to mix fully. Under the action of elastic element 1-11, baffle 1-10 is in close contact with the side wall of one end of grinding cylinder 1-1, which can reduce the gap between the two and achieve more thorough grinding.

[0032] In some examples, the high-pressure air inlet pipe 1-9 is supported by bearings within the hollow shaft of the hollow shaft screw feeder 1-6, and then connected to the high-pressure air knife 1-13. This facilitates the use of high-pressure air to blow the remaining material in the feeder 1-6 into the grinding cylinder 1-1 after feeding is completed. Alternatively, the high-pressure air inlet pipe 1-9 can also be installed within the hollow cylinder support 1-2 on the opposite side of the hollow shaft screw feeder 1-6.

[0033] In some instances, the inlet of the discharge duct 1-15 is located above the high-pressure air knife 1-13. Utilizing the difference in the height at which different particle sizes are blown up, powders meeting the particle size requirements are extracted. Specifically, the position of the inlet of the discharge duct 1-15 is adjustable, facilitating the extraction of powders of the desired particle size as needed.

[0034] In some instances, the lower part of the feed hopper 1-7 is equipped with a supplementary air vent valve 1-8.

[0035] In some instances, the powder collection bin includes a gyratory discharge bin 4-1, with a control fan 4-3 located below the gyratory discharge bin 4-1; The airlock 4-3 is connected to the collection bin 4-4, and the collection bin 4-4 is provided with an exhaust port.

[0036] In some instances, the gyratory hopper 4-1 is connected in series with a dust collector 4-2.

[0037] In some instances, the dust collector is equipped with a shut-off valve 4-3, which is connected to the collection bin 4-4.

[0038] In some instances, the inlet of the discharge duct 1-15 is equipped with a discharge valve 1-14. This valve can effectively close during operation; preferably, the discharge valve is unidirectional.

[0039] In some instances, the grinding cylinder 1-1 is provided with a feed inlet for easy replenishment of grinding media, etc.

[0040] In some instances, the grinding cylinder 1-1 is provided with a waste outlet for easy waste discharge.

[0041] The feed inlet and waste outlet can be the same, used for both feeding and discharging waste.

[0042] In some examples, there are multiple grinding cylinders 1-1. This helps to reduce the floor space required.

[0043] The above features can be combined arbitrarily as long as they do not conflict.

[0044] Specific examples: Please see the appendix Figure 1 As shown, an ultrafine bamboo powder grinder includes two grinders with the same function, which are symmetrically installed: a left-hand grinder 1 and a right-hand grinder 2, and an automatic adjustment controller 3.

[0045] Please see the appendix Figure 2As shown, the grinding machine with the same function includes a grinding cylinder 1-1, a hollow cylinder support 1-2, an equipment base 1-3, grinding balls 1-4, a gear drive motor 1-5, a hollow shaft screw feeder 1-6, a valve plate closed feed hopper 1-7, a supplementary air and explosion relief valve 1-8, an inert gas high-pressure air inlet pipe 1-9, a dead-angle-free baffle 1-10, a retaining spring 1-11, an organic lubricating plate 1-12, a high-pressure air knife 1-13, and a flexible shaft controlled discharge valve 1-14. 14. Discharge duct 1-15, discharge fan 1-16, grinding cylinder 1-1 is mounted on equipment base 1-3 via hollow cylinder support 1-2, grinding cylinder 1-1 contains grinding balls 1-4, grinding cylinder 1-1 is rotated by gear drive motor 1-5, hollow shaft screw feeder 1-6 is supported by bearings in the hollow cylinder support 1-2 on the left side of grinding cylinder 1-1, valve plate closed feed hopper 1-7 is mounted on hollow shaft screw feeder 1-6, supplementary... The air vent valve 1-8 is installed below the valve plate of the valve plate-sealed feed hopper 1-7. The inert gas high-pressure air inlet pipe 1-9 is supported by bearings inside the hollow shaft of the hollow shaft screw feeder 1-6. The high-pressure air inlet pipe 1-9 is connected to the high-pressure air knife 1-13. The hollow shaft screw feeder 1-6 is connected to the dead-angle-free baffle 1-10. The dead-angle-free baffle 1-10 is tightly attached to the inner left side of the grinding cylinder 1-1 through the organic lubricating plate 1-12 and the clamping spring 1-11. The material air duct 1-15 is supported by bearings and installed inside the hollow cylindrical support 1-2 on the right side. The flexible shaft controls the discharge valve 1-14, which is installed on the upper part of the dead-angle-free baffle 1-10. The discharge air duct 1-15 is connected to the dead-angle-free baffle 1-10 and is tightly attached to the inner wall of the right side of the grinding cylinder 1-1 through the organic lubricating plate 1-12 and the clamping spring 1-11. During discharge, the ultrafine bamboo powder blown by the high-pressure air knife 1-13 is drawn away by the discharge blower 1-16 through the discharge air duct 1-15. Specifically, the dead-angle-free baffle 1-10 is obtained by welding a semi-circular steel cylinder to a circular plate and is installed vertically on both sides of the grinding cylinder. When the grinding balls and materials tumble, they can slide across the surface of the semi-circular cylinder without forming dead angles or causing impact.

[0046] Please see the appendix Figure 3 As shown, the automatic adjustment controller of the equipment controls the intermediate relays 3-1 of the gear drive machine, 3-2 of the hollow shaft screw feeder, 3-3 of the valve plate sealing feed hopper, 3-4 of the air supply and explosion relief valve, 3-5 of the valve in the inert gas high-pressure air inlet pipe, 3-6 of the flexible shaft controlling the discharge valve, and 3-7 of the discharge fan through the compilation and adjustment program.

[0047] Please see the appendix Figure 4As shown, the multi-stage rotary feeding and dust collection integrated machine has three rotary feeding bins 4-1 and a bag filter 4-2, each equipped with a shut-off valve 4-3 at its lower outlet. The shut-off valve 4-3 is connected to a cylindrical collection bin 4-4. A screw conveyor 4-5 is installed at the lower part of the cylindrical collection bin 4-4, and a bag filter exhaust port 4-4-1 is installed at the upper part of the cylindrical collection bin 4-4. The powder drawn away by the discharge fan 1-16 enters the multi-stage rotary feeding and dust collection integrated machine to achieve gas-solid separation.

[0048] The above is a further detailed description of this utility model and should not be considered as a limitation on the specific implementation of this utility model. For those skilled in the art, simple deductions or substitutions without departing from the concept of this utility model are all within the protection scope of this utility model.

Claims

1. A dust explosion-proof ultrafine bamboo powder grinder, comprising a base, a grinding cylinder and its driving mechanism, characterized in that, The grinding cylinder is mounted on the equipment base via a hollow cylinder support. The hollow shaft screw feeder is installed inside the hollow cylinder support of the grinding cylinder by bearing support. The feed hopper of the hollow shaft screw feeder is installed outside the hollow cylinder support. A baffle is connected to one end of the hollow shaft screw feeder that extends into the grinding cylinder. The baffle is tightly attached to the side wall of one end of the grinding cylinder under the action of the elastic element. The high-pressure air inlet pipe is connected to the high-pressure air knife through a hollow cylindrical support; A discharge duct is provided at the end of the grinding cylinder away from the hollow shaft screw feeder. The discharge duct is installed in the hollow cylinder support by bearing support. The outlet of the discharge duct is transported to the powder collection bin by the discharge fan.

2. The dust explosion-proof ultrafine bamboo powder grinder according to claim 1, characterized in that, The inlet of the discharge air duct is located above the high-pressure air knife.

3. The dust explosion-proof ultrafine bamboo powder grinder according to claim 1, characterized in that, The lower part of the feed hopper is equipped with a supplementary air and explosion relief valve.

4. The dust explosion-proof ultrafine bamboo powder grinder according to claim 1, characterized in that, The powder collection bin includes a rotary discharge bin, and a blower is installed below the rotary discharge bin; The airlock is connected to the material collection bin, which is equipped with an exhaust port.

5. The dust explosion-proof ultrafine bamboo powder grinder according to claim 4, characterized in that, The rotary feeding hopper is connected in series with a dust collector.

6. The dust explosion-proof ultrafine bamboo powder grinder according to claim 5, characterized in that, The dust collector is equipped with a shut-off valve, which is connected to the collection bin.

7. The dust explosion-proof ultrafine bamboo powder grinder according to claim 1, characterized in that, The high-pressure air inlet pipe is supported by bearings inside the hollow shaft of the hollow shaft screw feeder, and then connected to the high-pressure air knife.

8. The dust-proof and explosion-proof ultrafine bamboo powder grinding machine according to claim 1 or 2, characterized in that, The inlet of the discharge duct is equipped with a discharge valve.

9. The dust explosion-proof ultrafine bamboo powder grinder according to claim 1, characterized in that, The grinding cylinder is equipped with a feed inlet and a waste outlet.

10. The dust explosion-proof ultrafine bamboo powder grinding machine according to claim 1, characterized in that, It has multiple grinding cylinders.

Images