Composite conductive particle emitting device for wood fiber micro-nano crushing

Abstract

The invention provides a wood fiber micro-nano fragmentation combined type conductive particle emission device, which comprises an air supply system, an emission control device, a recovery control device, an emission valve and a recovery valve, and is characterized in that the air supply system comprises an air storage device, a secondary pressure reducing valve and a two-position five-way single control solenoid valve; the pressure needed by opening and closing of the launching valve and the recovery valve is adjusted and controlled through the second-stage pressure reducing valve, it is guaranteed that the pressure provided by the gas storage device is kept at a constant value, meanwhile, a valve opening of the launching valve and the launching cavity are located at the coaxial position during launching every time, and therefore the stability of the launching speed every time is guaranteed. The emission and recovery control device is realized in an energy conversion manner, and the energy relationship in the emission and recovery device is changed through different power-on states of an emission magnet, so that the particles are emitted into the crushing cavity, or the particles are recovered from the crushing cavity through attraction generated by the emission magnet; the size of the energizing current is changed to adapt to the conditions of conductive particles with different particle sizes and emission cavities with different lengths.

Description

Technical Field

[0001] The invention belongs to the field of wood fiber processing devices, and in particular relates to a composite conductive particle emission device for micro-nano crushing of wood fibers. Background Art

[0002] Wood fiber is widely present in nature, mainly from plant materials such as wood, bamboo, hemp, bagasse, etc. Agricultural waste and forestry by-products are also common sources of wood fiber. By extracting fibers from these natural materials, a large amount of cheap and environmentally friendly raw materials can be obtained, which provides a basis for the development of sustainable materials. Functionalized wood fiber can be chemically modified or physically treated to increase its special physical and chemical properties. For example, the surface of wood fiber can be carboxylated or grafted to enhance its hydrophilicity, hydrophobicity or antibacterial properties. Currently, functionalized fibers are widely used in environmentally friendly materials, composite materials, pharmaceutical carriers and high-performance filtration materials.

[0003] The micronization of wood fibers can significantly improve their application properties, such as strength, toughness and adsorption capacity. This type of micro-nanostructured material has broad application prospects in the fields of flexible electronics, medical materials and composite materials. However, in the process of micronization, wood fibers often have problems such as poor uniformity, difficult size control and high processing energy consumption, which is also a major challenge for industrialization.

[0004] In the patent application with the publication number of CN 118181442 B, a magnetic crushing device, a production tower and a system for dry processing of wood fiber micronization are disclosed. The patent belongs to a method for dry processing of wood fiber. The crushing method used in this patent is to accelerate conductive particles by magnetic force, convert electromagnetic energy into kinetic energy of the conductive particle movement, thereby crushing the wood fiber in the cavity, and is characterized in that no toxic organic solvent is used in the crushing process; however, since it is necessary to artificially give the conductive particles an initial velocity before accelerating the circular motion to start the subsequent process, in actual production, the conductive particles have a small particle size, and it is difficult to obtain the initial velocity of the start, and due to the different positions of the initial velocity, the initial velocity of the start given each time has great differences and instability; similarly, the launch device is lowered into the cavity to launch the conductive particles when in use, and rises and leaves the cavity after the launch, that is, a lifting device needs to be set, resulting in unnecessary consumption of energy; at the same time, after the crushing work is completed, the conductive particles are adsorbed on the inner wall of the cavity by the gravitational device, resulting in the inability to recover the conductive particles, and the inability to verify their loss rate, which is not convenient for timely replenishment of the conductive particles, resulting in a decrease in the continuous micronization efficiency. Summary of the invention

[0005] The present invention aims at the problems existing in the starting process of conductive particles in the magnetic crushing device, production tower and processing system of wood fiber micro-nano dry processing, innovates the existing starting method, and overcomes the difficulty in providing the initial velocity before acceleration of the existing professional equipment and the problem that some conductive particles cannot obtain the initial velocity. The present invention discloses a composite conductive particle launching device for wood fiber micro-nano crushing, which uses electromagnetic energy and mechanical energy as launching energy, realizes the directional launching and recovery of conductive particles through the mutual conversion of electromagnetic energy and mechanical energy in the launching cavity, so that the launched conductive particles have a uniform initial velocity, and the electromagnetic driving device can fully accelerate the conductive particles.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, the present invention discloses a composite conductive particle launch device for micro-nano crushing of wood fibers, comprising an air supply system, a launch control device, a recovery control device, a launch valve and a recovery valve;

[0008] The launch valve is connected to the launch control device, the recovery valve is connected to the recovery control device, and the launch valve and the recovery valve are symmetrically arranged relative to the center of the closed annular crushing cavity;

[0009] The launch valve and the recovery valve have the same structure, and each includes a valve core, a launch recovery port, a valve body, a first air inlet pipe, and a second air inlet pipe; a valve core is arranged inside the valve body, and the valve core moves in an arc in the valve body; a launch recovery port is arranged on the side wall of the valve body, and the axis of the launch recovery port is tangent to the axis of the closed annular crushing cavity; and a first air inlet pipe and a second air inlet pipe are arranged on the side wall of the valve body, and the first air inlet pipe and the second air inlet pipe are connected to the air supply system to control the movement of the valve core;

[0010] The launch control device and the recovery control device have the same structure, each including a warehouse body, at least one group of control components are arranged in the warehouse body, each group of control components includes a magnetic induction coil, a front electromagnet, a rear electromagnet, and a spring; the warehouse body is connected to the launch recovery port through a launch recovery pipeline, the front electromagnet is installed at the front end of the warehouse body, and the rear electromagnet is installed at the rear end of the warehouse body, and a magnetic induction coil is wound around the front electromagnet and the rear electromagnet. The front electromagnet and the rear electromagnet are connected by a spring, and the rear electromagnet is fixed, and the front electromagnet can move under the action of the spring; the gravitational force generated between the electromagnet and the magnetic induction coil assembly is used to store energy for the spring as the launch energy of the conductive particles, and the conductive particles are recovered by the gravitational force generated by the front electromagnet, thereby realizing the launch and recovery of the conductive particles.

[0011] As a further technical solution, when multiple groups of control components are provided, the multiple groups of control components are controlled independently or uniformly.

[0012] As a further technical solution, when multiple groups of control components are provided, the multiple groups of control components are evenly arranged along the circumferential direction of the bin body.

[0013] As a further technical solution, when a group of control components is provided, the group of control components is provided on the center line of the warehouse body and is coaxially provided with the launch and recovery pipe.

[0014] As a further technical solution, a speed measuring device is provided at the end of the launch recovery pipeline, close to the launch valve and the recovery valve.

[0015] As a further technical solution, a speed measuring device is installed at the end of the launch recovery pipeline, close to the launch valve and the recovery valve. If the launch speed of the conductive particles changes significantly, the information is fed back to the control system to terminate the subsequent magnetic acceleration process and repair the problem with the launch device.

[0016] As a further technical solution, the air supply system consists of an air storage device, a connecting pipe, a two-stage pressure reducing valve, and a two-position five-way single-control solenoid valve; the internal pressure of the air storage device is controlled by the two-stage pressure reducing valve, and the air storage device is connected to the first air intake pipe and the second air intake pipe through a connecting pipe, and a two-position five-way single-control solenoid valve is also provided on the connecting pipe.

[0017] As a further technical solution, the launching valve comprises multiple launching valves, and the multiple launching valves are arranged along the circumferential direction of the closed annular crushing cavity. The axis of the launching recovery port of each launching valve is tangent to the axis of the closed annular crushing cavity, and they are arranged in a clockwise or counterclockwise direction in sequence.

[0018] As a further technical solution, the receiving valve includes multiple receiving valves, which are arranged along the circumferential direction of the closed annular crushing cavity. The axis of the emission recovery port of each receiving valve is tangent to the axis of the closed annular crushing cavity, and are arranged in a clockwise or counterclockwise direction in sequence.

[0019] As a further technical solution, the launch control device can work as a recovery control device, and the recovery control device can work as a launch control device.

[0020] The air supply system of the composite conductive particle launcher for micro-nano crushing of wood fiber controls the pressure required for opening and closing the launch recovery valve, ensuring that the pressure provided by the air storage device remains constant. At the same time, the launch recovery valve port is coaxial with the launch cavity during each launch, thereby ensuring the stability of each launch speed. The launch recovery control device is realized by energy conversion, and the launch and recovery of conductive particles are realized through different working states between electromagnets. The current is changed to adapt to the conditions of conductive particles of different particle sizes and launch cavities of different lengths.

[0021] The beneficial effects of the above embodiments of the present invention are as follows:

[0022] 1. The composite conductive particle launcher for composite wood fiber micro-nano crushing proposed by the present invention uses the conversion of electromagnetic energy and mechanical energy as the launch energy to start, so that the conductive particles have an initial velocity before acceleration, avoiding the complexity and precision of the structure started by pneumatic means. The launcher can make the conductive particles have the same initial velocity each time they are launched by passing the same current, and the energy consumption rate is low, and the launch time is short, only a few to ten milliseconds are needed. The initial velocity is adjusted by changing the size of the current, and both variable speed and variable pitch launch are applicable; the air supply system is equipped with a two-stage pressure reducing valve, and the output pressure is adjustable. According to the different diameters of the crushing cavity and the different diameters of the launch cavity, the appropriate output pressure is selected, so that the valve port of the launch recovery valve is in the same axial position with the launch cavity during each launch, thereby ensuring the stability of each launch speed; the launcher is arranged on the outer ring of the annular crushing cavity and is launched along the tangent direction of the cavity pipeline. Due to the design of the large diameter and small curvature annular crushing cavity and the existence of the gravitational device, there is no need to consider the problem of conductive particles sticking to the wall, and after launch, they can quickly move along the predetermined orbit of the annular crushing cavity.

[0023] 2. The symmetrical launching and recovering device proposed in the present invention has an launching valve and a recovering valve with the same structure, and the launching valve and the recovering valve can be used interchangeably. If it is necessary to launch conductive particles from the recovering valve, it is only necessary to change the direction of the current of the electromagnetic driving device so that the micro-nano pulverization of wood fibers can proceed normally. After the pulverization work is completed, the electromagnetic driving device is powered off, and the conductive particles continue to move in the annular pulverization cavity at the speed obtained in the accelerated state, gradually slow down and are injected into the recovering valve, and then are stored. They are launched from the recovering end during the next pulverization work, and there is no need to re-introduce the conductive particles, thereby realizing the recycling of the conductive particles. The launching and recovering devices are fixed on the outer ring of the annular pulverization cavity, and there is no need to rise and fall. Only the control system is required to control the opening and closing of the launching valve and the recovering valve.

[0024] 3. The launching device of the present invention realizes launching by mutual conversion of electromagnetic energy and mechanical energy. Its working process is to generate a magnetic field by passing current in the same direction into two electromagnets in the conductive particle bin, and using the theory of opposites attract, a gravitational force is generated between the two electromagnets, so that the spring between the electromagnets is in a compressed state, and the electromagnetic energy is converted into the mechanical energy of the spring. During the launching process, the two electromagnets stop being energized, the gravitational force disappears, the spring releases the stored potential energy, and the conductive particles are launched into the crushing cavity; during the recovery process, the two electromagnets attract each other to restore the spring to a compressed state, and the magnetic force generated by the front electromagnet adsorbs the conductive particles in the recovery bin; the electromagnet only needs to be energized during the launching and recovery processes, and not during the crushing process, so there will be no influence of magnetic force on the trajectory of the conductive particles during the crushing process; the device has a simple structure, is easy to implement and control, has a short working time, does not overheat, has a low equipment loss rate, does not require an additional cooling device, and has a high energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 It is a schematic diagram of the overall structure of the composite conductive particle launch device for micro-nano crushing of wood fibers proposed by the present invention;

[0027] Figure 2 This is a front view of a composite conductive particle launcher for micro-nano crushing of wood fibers;

[0028] Figure 3 It is a side view of a composite conductive particle launcher for micro-nano-fragmentation of wood fibers;

[0029] Figure 4 It is a schematic diagram of the overall structure of the launch recovery port valve of the composite conductive particle launch device for micro-nano crushing of wood fibers;

[0030] Figure 5 It is a cross-sectional view of a launch recovery port valve of a composite conductive particle launch device for micro-nano crushing of wood fibers;

[0031] Figure 6 It is a cross-sectional view of a single-chamber and single-magnetic-plate launching chamber of a composite conductive particle launching device for micro-nano crushing of wood fibers;

[0032] Figure 7 It is a schematic diagram of the internal structure of a multi-chamber and multi-magnetic plate launch chamber of a composite conductive particle launch device for micro-nano crushing of wood fibers;

[0033] Figure 8It is a ring photoelectric gate of a composite conductive particle emission device for micro-nano crushing of wood fibers.

[0034] In the figure: 1, launch chamber support seat, 2, launch control device, 3, launch valve, 4, two-position five-way single-control solenoid valve, 5, solenoid valve connecting pipe, 6, secondary pressure reducing valve, 7, gas storage device connecting pipe, 8, gas storage device, 9, gas storage device support frame, 10, recovery chamber support seat, 11, recovery control device, 12, annular crushing cavity, 13, recovery valve, 14, two-position five-way single-control solenoid valve, 15, first launch air intake pipe, 16, second launch air intake pipe, 17 , first recovery air intake pipe, 18, second recovery air intake pipe, 19, valve core, 20, launch recovery port, 21, valve body, 22, spring, 23, front end magnetic induction coil, 24, front end electromagnet, 25, rear end electromagnet, 26, rear end magnetic induction coil, 27, launch chamber port, 28, front end magnetic induction coil, 29, front end electromagnet, 30, spring, 31, rear end magnetic induction coil, 32, rear end electromagnet, 33, pipeline in the launch chamber, 34, launch recovery pipeline. DETAILED DESCRIPTION

[0035] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0037] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0038] As introduced in the background technology, in the prior art, due to the dense hydrogen bond structure between wood fiber molecules and the high hardness of wood fiber powder caused by the presence of lignin, huge energy needs to be consumed in the process of wood fiber micronization. When preparing micronized wood fiber powder by mechanical method, a mechanical grinder with higher rotation speed is required. A large amount of heat is generated in the mechanical crushing process, resulting in gelatinization of wood fiber. Considering the heat dissipation problem, a large amount of solvent needs to be added in the crushing process, resulting in irreversible consumption of energy. This embodiment aims at the problems existing in the starting process of conductive particles in the magnetic crushing device, production tower and processing system of wood fiber micronization dry processing, innovates the existing starting method, breaks through the difficulty of providing the initial velocity before acceleration of existing professional equipment, and the problem that some conductive particles cannot obtain the initial velocity. The present invention discloses a composite conductive particle launching device for wood fiber micronization crushing, which uses electromagnetic energy and mechanical energy as launching energy, and drives the conductive particles to realize directional launch along the cavity through the conversion of electromagnetic energy and mechanical energy in the launching cavity, so that the conductive particles have a uniform initial velocity, and the electromagnetic driving device can fully accelerate the conductive particles.

[0039] This embodiment specifically discloses a composite conductive particle launcher for micro-nano crushing of wood fibers, which is suitable for launching conductive particles of different particle sizes, solves the problem that it is difficult for conductive particles to obtain an initial velocity before the crushing work begins, and makes the conductive particles have a uniform initial velocity, which has good practical utility and engineering application value; wherein, the conductive particle launcher for micro-nano dry processing of wood fibers is as follows Figure 1 As shown, the electromagnetic drive device is able to fully accelerate the conductive particles.

[0040] The composite conductive particle launcher for micron-nano dry processing of wood fiber is composed of an air supply system, a launch control device, a recovery control device, a launch valve, and a recovery valve to realize the launch of conductive particles. The composite conductive particle launcher for micron-nano dry processing of wood fiber proposed in this patent is based on the theory that like charges repel and opposite charges attract each other. Under the condition that the electromagnet is energized, the two ends of the two electromagnets with different magnetic properties attract each other, so that the spring is in a compressed state, and the electromagnetic energy is converted into the mechanical potential energy of the spring. During the launch process, the electromagnet stops energizing, the spring is in an extended state, and the mechanical potential energy of the spring is converted into the kinetic energy of the conductive particles, thereby realizing the launch of conductive particles. During the recovery process, the two electromagnets attract each other to restore the spring to a compressed state, and the magnetic force generated by the front electromagnet adsorbs the conductive particles in the recovery bin; the electromagnet only needs to be energized during the emission and recovery process, and is not energized during the crushing process, so there will be no influence of the magnetic force on the trajectory of the conductive particles during the crushing process; the presence of the emission valve and the recovery valve ensures that the annular crushing cavity remains well closed during the crushing state, and at the same time, the emission and recovery of conductive particles can be achieved without lifting the emission device, thereby realizing the automation and continuity of the micro-nano crushing process of wood fibers.

[0041] The above-mentioned composite conductive particle launching device for micro-nano dry processing of wood fiber has overcome the difficulty of existing professional equipment in providing the initial velocity before acceleration and the problem that some conductive particles cannot obtain the initial velocity. It makes the conductive particles have a uniform initial velocity, and the launching and recovery process is more automated, so that the electromagnetic drive device can fully accelerate the conductive particles.

[0042] The launching device of the uniformly distributed large-diameter magnetic crushing equipment for micro-nano dry processing of wood fibers proposed by the present invention is described in detail below in conjunction with the accompanying drawings:

[0043] Example 1

[0044] First, the launching device of the uniformly distributed large-diameter magnetic crushing device for micro-nano dry processing of wood fiber disclosed in this embodiment is as follows: Figure 1 As shown, it mainly includes a closed annular crushing cavity, an air supply system, a launch control device, a recovery control device, a launch valve and a recovery valve; the launch valve is connected to the launch control device, and the recovery valve is connected to the recovery control device, and the launch valve and the recovery valve are symmetrically arranged relative to the center of the closed annular crushing cavity; and the launch valve and the recovery valve have the same structure, and the difference lies in that they have different functions, one valve is used for launching conductive particles, and the other valve is used for recovering conductive particles, so the launch valve and the recovery valve can be used interchangeably; the launch control device and the recovery control device have the same structure, and the difference mainly lies in that the directions of the current passed are different, so the launch control device and the recovery control device can also be used interchangeably.

[0045] In this embodiment, the launch valve and the recovery valve are symmetrically arranged in pairs; at least one launch valve and one recovery valve are provided respectively, and two or three valves can also be provided respectively; the specific number is set according to the size of the closed annular crushing cavity; this embodiment is described by taking one launch valve and one recovery valve as an example;

[0046] In this embodiment, a launching valve and a recovery valve are symmetrically arranged in the circumferential direction of the closed annular pulverizing cavity and along the direction tangent to the axis of the closed annular pulverizing cavity. Specifically, the axis of the valve openings of the launching valve and the recovery valve are tangent to the axis of the closed annular pulverizing cavity. The launching valve and the recovery valve are pneumatically controlled and are connected to the same air supply system. A launching control device is arranged at the launching valve, and a recovery control device is arranged at the recovery valve. Specifically, the launching and recovery pipelines 34 of the launching and recovery control devices are in a coaxial position with the valve openings of the launching and recovery valves, and are connected to the outer walls of the launching and recovery valves. Specifically, the launching and recovery control devices are fixed in position, the launching device support seat and the gas storage device support frame are in the same horizontal plane, the launching and recovery control devices have the same structure, and therefore can be converted to each other, and can both be used as launching chambers and recovery chambers.

[0047] Specifically, the air supply system is composed of an air storage device support frame 9, an air storage device 8, an air storage device connecting pipe 7, a two-level pressure reducing valve 6, an electromagnetic valve connecting pipe 5, a two-position five-way single-control electromagnetic valve 4, and a two-position five-way single-control electromagnetic valve 14; specifically, the two-level pressure reducing valve 6 controls the internal pressure of the air storage device 8 to ensure the normal and stable operation of the launch valve and the recovery valve and the controllable speed of opening and closing of each launch valve and the recovery valve; taking one of the launch and recovery control devices as an example, the two-position five-way single-control electromagnetic valve 4 controls the ventilation state of the four air intake pipes to realize the opening and closing of the launch valve and the recovery valve and the launch and recovery work.

[0048] Specifically, the launch valve 3 and the recovery valve 13 have the same structure, and the launch valve is taken as an example for explanation below; the launch valve 3 includes a valve core 19, a launch recovery port 20, a valve body 21, a first launch air intake pipe 15 and a second launch air intake pipe 16; specifically, the valve body 21 is an arc-shaped cavity structure, which is sleeved on the outer ring of the annular crushing cavity 12, and the valve core 19 is also an arc-shaped cavity structure, which is sleeved in the annular gap formed by the annular crushing cavity 12 and the valve core 19, a launch recovery port is arranged on the side wall of the annular crushing cavity 12, and a launch recovery port 20 is also arranged on the valve body 21. By controlling the movement of the valve core 19, it is possible to control whether the two launch recovery ports are connected. When it is necessary to launch conductive particles, the two launch recovery ports are connected, and when it is not necessary to launch conductive particles, the two launch recovery ports are not connected; and the valve core 19 moves in an arc in the valve body 21, and the axis of the launch recovery port 20 is tangent to the axis of the closed annular crushing cavity 12; Figure 5The figure shows the position state of the launch valve 3 when the conductive particles are launched. At this time, the launch recovery port 20 on the launch valve is connected to the launch chamber pipeline, and the conductive particles are launched by the launch recovery control device through the above-mentioned channel along the tangential direction of the closed annular crushing cavity; when the launch is completed, the two-position five-way single-control solenoid valve 4 of the air supply system controls the first launch air inlet pipe to discharge gas, and the second launch air inlet pipe to introduce gas, pushing the valve core 19 to move to the left along the valve body 21, so that the launch recovery port 20 is closed. During the crushing process, the annular crushing cavity 12 still maintains good sealing, and there will be no overflow of conductive particles or wood fibers; similarly, when it is necessary to launch conductive particles, the two-position five-way single-control solenoid valve 4 of the air supply system controls the second launch air inlet pipe to introduce gas, and the first launch exhausts gas, pushing the valve core 19 to move to the right along the valve body 21, so that the launch recovery port 20 is opened, and the subsequent launch process is completed.

[0049] Furthermore, when the crushing work is completed, the recovery valve opens the emission recovery port 20 in the above manner. At this time, the recovery control device plays a recycling role, recovers and stores the used conductive particles, and conducts a quality assessment on them to detect whether the recovered quality meets the standard for the next continuous processing. If the quality is insufficient, it will be supplemented.

[0050] Specifically, the launch control device and the recovery control device have the same structure, and the launch control device is taken as an example for explanation below:

[0051] The invention comprises a launch chamber support seat 1, a launch chamber 2, a spring 22, a front end magnetic induction coil 23, a front end electromagnet 24, a rear end electromagnet 25, a rear end magnetic induction coil 26, a launch chamber internal pipe 33, and a launch recovery pipe 34; specifically, the front end electromagnet 24 and the rear end electromagnet 25 are dumbbell-shaped and are arranged at the front end and the rear end of the launch chamber 2, the front end electromagnet 23 is in an active state, and the rear end electromagnet is in a fixed state, the two electromagnets are connected by a spring 22, and the spring 22, the front end electromagnet 24, and the rear end electromagnet 25 are located in the launch chamber internal pipe 33, the launch recovery pipe 34 is coaxially installed with the launch chamber internal pipe 33, and the conductive particles are located in the launch recovery pipe 34; the front end magnetic induction coil 23 is wound around the front end electromagnet 24, and the rear end electromagnet 25 is wound around There is a rear end magnetic induction coil 26; the assembly formed by the front end electromagnet 24 and the front end magnetic induction coil 23, the rear end electromagnet 25 and the rear end magnetic induction coil 26 generates attraction when the same direction of current is passed, so that the spring is in a compressed state, and the electromagnetic energy is converted into mechanical potential energy of the spring, storing energy for the emission of conductive particles. When the two electromagnet assemblies stop being energized, the attraction disappears, the spring is in an extended state, and the mechanical potential energy is converted into kinetic energy of the conductive particles, thereby realizing the emission of the conductive particles; during the recovery process, the two electromagnet assemblies are energized, the spring returns to the compressed state, and the attraction generated by the front end electromagnet 24 adsorbs the conductive particles, thereby realizing the recovery of the conductive particles; the launch chamber 2 is fixed by the launch chamber support seat 1, and the bottom surface of the support seat 1 is in the same plane as the bottom surface of the gas storage device support frame 9.

[0052] Specifically, the magnetic induction coils 23 and 26 are supplied with current in the same direction, and a magnetic field is given to the front electromagnet 24 and the rear electromagnet 25. Since the magnetic fields of the two electromagnets are in the same direction, the opposite poles are in a relative state, and since opposite poles attract each other, the electromagnet compresses the spring. During the recovery operation, the front electromagnet 24 adsorbs the conductive particles thereon. During the launch operation, the two electromagnets stop being energized, and the spring releases potential energy, pushing the front electromagnet 24 to move forward along the launch recovery pipe 34. The energy is converted into the kinetic energy of the conductive particles adsorbed by the front electromagnet 24, thereby launching the conductive particles. At this time, the launch recovery port 20 on the launch valve is closed. It is connected to the launch recovery pipeline and is closed immediately after the launch is completed to ensure the good sealing of the annular crushing cavity. During the recovery work, the recovery device with the same function arranged on the symmetrical side energizes the front electromagnet 24 and the rear electromagnet 25 in the recovery device, giving the front electromagnet 24 and the rear electromagnet 25 a magnetic field. The two electromagnets attract each other, and the spring returns to the compressed state to store energy for the next launch. At the same time, the magnetic field generated by the front electromagnet 24 absorbs the conductive particles in the annular crushing cavity into the recovery bin. At this time, the launch recovery port 20 on the recovery valve is connected to the launch recovery pipeline, and the valve is closed immediately after the recovery is completed.

[0053] Furthermore, a speed measuring device is provided at the end of the launch recovery pipe, close to the launch valve and the recovery valve. The speed measuring device uses a ring photoelectric gate, such as Figure 8 As shown, it is used to measure the instantaneous speed of the conductive particles and transmit it to the control system. If the launch speed of the conductive particles changes significantly, the information is fed back to the control system to terminate the subsequent magnetic acceleration process and repair the problems in the launch device.

[0054] Furthermore, the conductive particles in this embodiment are ferroferric oxide or ferrous oxide, but are not limited to ferroferric oxide and ferrous oxide. The conductive particles required are selected independently according to the wood fiber raw materials of different sources, different particle sizes, and different hardnesses as well as the production requirements. When the particle size of the wood fiber is large, the launch device selects conductive particles with larger particle size and higher hardness; when the micro-nano crushing is derived from hardwood wood fiber (for example: mahogany, oak, etc.), its hardness is large, and the launch device selects conductive particles with larger particle size and higher hardness; when the micro-nano crushing is derived from softwood wood fiber (for example: fir, white pine, etc.), the launch device selects conductive particles with smaller particle size to achieve adaptive micro-nano crushing of different types of wood fibers.

[0055] Furthermore, the closed annular crushing cavity 12 is made of high-quality carbon steel, such as No. 45 carbon steel, 40Cr carbon steel, No. 60 carbon steel, etc., but not limited to the above three types of carbon steel.

[0056] Furthermore, the electromagnets 24 and 25 are made of soft iron with very low carbon content, have good magnetic conductivity and low residual magnetism, can be quickly magnetized and demagnetized, and are suitable for the dynamic working conditions of this patent.

[0057] Furthermore, the magnetic induction coils 23 and 26 are wound with copper wires and connected to the current control element; they provide excellent conductivity and low resistance, and can reduce the energy loss generated by the current.

[0058] Furthermore, the solenoid valve connecting pipe 5, the gas storage device connecting pipe 7, the first launch air intake pipe 15, the first launch air intake pipe 16, the first recovery air intake pipe 7, and the second recovery air intake pipe 18 are made of Q235 carbon steel with good plasticity, and the pipe wall thickness is 5-10mm.

[0059] Furthermore, the above-mentioned two-position five-way single-control solenoid valve 11 and two-stage pressure reducing valve 21 are selected according to specific specifications in accordance with national standards or industry standards.

[0060] Furthermore, the gas storage device 8 is made of No. 20 carbon steel with high strength, strong pressure resistance and low manufacturing cost, and the anti-corrosion coating is selected independently according to whether the use environment is corrosive.

[0061] Furthermore, the launch chamber support seat 1 and the gas storage device support frame 9 are made of cast iron to reduce manufacturing costs.

[0062] Furthermore, the above-mentioned components are made of high-quality carbon steel, such as No. 20 carbon steel, but not limited to No. 20 carbon steel.

[0063] Example 2

[0064] Based on Example 1, the internal structure of the multi-bin multi-magnetic plate launch chamber of the conductive particle launch device for micro-nano pulverization of wood fibers disclosed in this embodiment is as follows Figure 7 As shown, it includes a launch bay 27, a front electromagnet 29, a front magnetic induction coil 28, a spring 30, a rear magnetic induction coil 31, a rear electromagnet 32, and a launch bay pipe 33; the launch device proposed in this embodiment has multiple independent launch bays 27, and each independent launch bay 27 is equipped with a group of front electromagnets 29, front magnetic induction coils 28, springs 30, rear magnetic induction coils 31, rear electromagnets 32 and launch bay pipes 33; multiple independent launch bays 27 are connected to the same launch recovery pipe 34, that is, multiple groups of launch drive devices in Example 1 are installed in parallel;

[0065] The axis of the launch chamber pipe 33 and the launch recovery pipe 34 are in parallel positions; in a launch chamber pipe 33 connected to each launch chamber port 27, a front end electromagnet 29 and a rear end electromagnet 32 ​​are arranged along the axial direction of the launch chamber pipe 33, and the two electromagnets are both dumbbell-shaped and coaxial with the chamber; a front end magnetic induction coil 28 is wound around each front end electromagnet 29; a rear end magnetic induction coil 31 is wound around the rear end electromagnet 32; the front end electromagnet 29 and the front end magnetic induction coil 28, the rear end electromagnet 32 ​​and the rear end magnetic induction lines The assembly formed by the ring 31 generates an attractive force when the current in the same direction is passed through it, so that the spring 30 is in a compressed state, and the electromagnetic energy is converted into the mechanical potential energy of the spring, so as to store energy for the emission of the conductive particles. When the two electromagnet assemblies stop being energized, the attractive force disappears, and the spring 30 is in an extended state, so that the mechanical potential energy is converted into the kinetic energy of the conductive particles, so as to realize the emission of the conductive particles. During the recovery process, the two electromagnet assemblies are energized, the spring 30 returns to the compressed state, and the attractive force generated by the front electromagnet 29 adsorbs the conductive particles, so as to realize the recovery of the conductive particles. This is the same as the emission principle in Example 1.

[0066] It should be noted that each of the emission recovery pipes 34 mentioned above can be controlled independently or simultaneously.

[0067] Specifically, during the conductive particle emission process, the control system only needs to activate the electromagnet corresponding to the chamber where the conductive particles to be emitted are located, so that the conductive particles in the corresponding chamber can be emitted into the closed annular crushing cavity; similarly, during the conductive particle recovery process, the conductive particles can be recovered by activating the electromagnet in the corresponding chamber.

[0068] Furthermore, the multi-bin multi-magnetic plate launch bin described in Example 2 and the single-bin single-magnetic plate launch bin described in Example 1 can be independently coordinated and selected according to actual production requirements. It can be a single-bin single-magnetic plate launch device and a multi-bin multi-magnetic plate recovery device, or a multi-bin multi-magnetic plate launch device and a single-bin single-magnetic plate recovery device.

[0069] Furthermore, the working states of the multiple electromagnets in the multi-bin and multi-magnetic plate launching bin of the conductive particle launching device for micro-nano crushing of wood fibers are independent of each other and do not affect each other; the existence of the multi-bin and multi-magnetic plate launching bin avoids the need to refill the conductive particles after each crushing, thereby greatly improving the efficiency of micro-nano crushing of wood fibers.

[0070] It should be noted that this launching device is not limited to systems for crushing wood fibers. Using the same launching principle, it can also be used for crushing and launching other substances, which is also within the scope of protection of this patent.

Claims

1. A composite conductive particle emission device for micro-nano crushing of wood fibers, characterized in that: It includes an air supply system, a launch control device, a recovery control device, a launch valve and a recovery valve; The launch valve is connected to the launch control device, and the recovery valve is connected to the recovery control device; The launch valve and the recovery valve have the same structure, and each includes a valve core, a launch recovery port, a valve body, a first air inlet pipe and a second air inlet pipe; a valve core is arranged inside the valve body, and the valve core moves in an arc in the valve body; a launch recovery port is arranged on the side wall of the valve body, and the axis of the launch recovery port is tangent to the axis of the closed annular crushing cavity; and a first air inlet pipe and a second air inlet pipe are arranged on the side wall of the valve body, and the first air inlet pipe and the second air inlet pipe are connected to the air supply system, and the movement of the valve core is controlled, thereby controlling the opening and closing of the launch recovery port; The launch control device and the recovery control device have the same structure, each including a warehouse body, at least one group of control components are arranged in the warehouse body, each group of control components includes a magnetic induction coil, a front electromagnet, a rear electromagnet, and a spring; the warehouse body is connected to the launch recovery port through a launch recovery pipeline, the front electromagnet is installed at the front end of the warehouse body, and the rear electromagnet is installed at the rear end of the warehouse body, and a magnetic induction coil is wound around the front electromagnet and the rear electromagnet. The front electromagnet and the rear electromagnet are connected by a spring, and the rear electromagnet is fixed, and the front electromagnet can move under the action of the spring; the gravitational force generated between the electromagnet and the magnetic induction coil assembly is used to store energy for the spring as the launch energy of the conductive particles, and the conductive particles are recovered by the gravitational force generated by the front electromagnet, thereby realizing the launch and recovery of the conductive particles.

2. The composite conductive particle emission device for micro-nano crushing of wood fibers as claimed in claim 1, characterized in that: When multiple groups of control components are set, the multiple groups of control components are controlled independently or uniformly.

3. The composite conductive particle emission device for micro-nano crushing of wood fibers as claimed in claim 1, characterized in that: When multiple groups of control components are provided, the multiple groups of control components are evenly arranged along the circumferential direction of the bin body.

4. The composite conductive particle emission device for micro-nano crushing of wood fibers as claimed in claim 2, characterized in that: When the control components are arranged in a group, the group of control components is arranged on the center line of the warehouse body and is coaxially arranged with the launch and recovery pipeline.

5. The composite conductive particle emission device for micro-nano crushing of wood fibers as claimed in claim 1, characterized in that: A speed measuring device is provided at the end of the launch recovery pipeline, close to the launch valve and the recovery valve.

6. The composite conductive particle emission device for micro-nano crushing of wood fibers as claimed in claim 1, characterized in that: The air supply system is composed of an air storage device, a connecting pipe, a two-stage pressure reducing valve, and a two-position five-way single-control solenoid valve; the air storage device provides energy for the opening and closing of the launch valve and the recovery valve, and its internal pressure is controlled at a constant value by the two-stage pressure reducing valve. The air storage device is connected to the first air intake pipe and the second air intake pipe through a connecting pipe, and the first air intake pipe and the second air intake pipe are connected to the side wall of the valve body, so that the opening and closing of the valve port is controlled by the air pressure provided by the air storage device. A two-position five-way single-control solenoid valve is also provided on the connecting pipe to control the working state of the first air intake pipe and the second air intake pipe.

7. The composite conductive particle emission device for micro-nano crushing of wood fibers as claimed in claim 6, characterized in that: An air pressure sensor is arranged in the air storage device to monitor the pressure state of the air storage device in real time.

8. The composite conductive particle emission device for micro-nano crushing of wood fibers as claimed in claim 1, characterized in that: The launching valves include multiple launching valves, which are arranged along the circumferential direction of the closed annular crushing cavity. The axis of the launching recovery port of each launching valve is tangent to the axis of the closed annular crushing cavity, and are arranged in a clockwise or counterclockwise direction.

9. The composite conductive particle emission device for micro-nano crushing of wood fibers as claimed in claim 1, characterized in that: The receiving valves include multiple receiving valves, which are arranged along the circumferential direction of the closed annular crushing cavity. The axis of the launch recovery port of each receiving valve is tangent to the axis of the closed annular crushing cavity, and are arranged in a clockwise or counterclockwise direction.

10. The composite conductive particle emission device for micro-nano crushing of wood fibers according to claim 1, characterized in that: The launch control device can work as a recovery control device, and the recovery control device can work as a launch control device.

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