A composite conductive particle emission device for micro-nano crushing of wood fibers

Abstract

The present invention provides a composite conductive particle launch device for micro-nano crushing of wood fibers, comprising an air supply system, an emission control device, a recovery control device, an emission valve and a recovery valve. The air supply system comprises an air storage device, a two-stage pressure reducing valve and a two-position five-way single-control solenoid valve. The pressure required for opening and closing the emission valve and the recovery valve is regulated and controlled by the two-stage pressure reducing valve to ensure that the pressure provided by the air storage device remains constant. At the same time, the valve port of the emission valve is in a coaxial position with the emission cavity during each emission, thereby ensuring the stability of each emission speed. The emission recovery control device is implemented by energy conversion, and the energy relationship in the emission recovery device is changed by different power-on states of the emission magnet, thereby launching the particles into the crushing cavity, or recovering the particles from the crushing cavity by the gravity generated by the emission magnet. The current is changed to adapt to the conditions of conductive particles of different particle sizes and emission cavities of 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 derived from plant materials such as wood, bamboo, hemp, and sugarcane bagasse. 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 filter materials.

[0003] The micronization and nanostructuring of wood fibers can significantly improve their performance properties, such as strength, toughness, and adsorption capacity. These micro- and nanostructured materials hold broad application prospects in flexible electronics, medical materials, and composite materials. However, during the micronization and nanostructuring process, wood fibers often suffer from poor uniformity, difficulty in dimensional control, and high processing energy consumption, which poses a major challenge to industrialization.

[0004] Patent application publication number CN 118181442 B discloses a magnetic pulverization device, production tower, and system for dry micro-nanoprocessing of wood fibers. This patent pertains to a method for dry processing of wood fibers. The pulverization method employed in this patent utilizes magnetic force to accelerate conductive particles, converting electromagnetic energy into kinetic energy for the movement of the conductive particles, thereby pulverizing the wood fibers in a cavity. The patent is characterized in that no toxic organic solvents are used in the pulverization process. However, because an initial velocity must be artificially imparted to the conductive particles before accelerating their circular motion to initiate the subsequent process, in actual production, the conductive particles are relatively small in size, making it difficult to obtain the initial velocity. Furthermore, due to differences in the initial velocity position, the initial velocity imparted each time varies significantly and is unstable. Similarly, the launcher, when in use, descends into the cavity to launch the conductive particles and then rises and leaves the cavity after launch, requiring a lifting device, resulting in unnecessary energy consumption. Furthermore, after the pulverization process is completed, the conductive particles are adsorbed on the inner wall of the cavity by a gravitational device, making it impossible to recover the conductive particles and verify their loss rate. This makes it difficult to replenish the conductive particles in a timely manner, resulting in reduced efficiency in continuous micro-nanoprocessing. Summary of the Invention

[0005] The present invention addresses the problems existing in the starting process of conductive particles in a magnetic crushing device, a production tower and a processing system for micro-nano dry processing of wood fibers, innovates the existing starting method, and overcomes the problems that existing professional equipment has difficulty in providing the initial velocity before acceleration and that some conductive particles cannot obtain the initial velocity. The present invention discloses a composite conductive particle launch device for micro-nano crushing of wood fibers, which uses electromagnetic energy and mechanical energy as launch energy, and realizes the directional launch and recovery of conductive particles through the mutual conversion of electromagnetic energy and mechanical energy in the launch cavity, so that the launched conductive particles have a uniform initial velocity, and the electromagnetic drive 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, each comprising 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 disposed inside the valve body, and the valve core moves in an arc within the valve body; a launch recovery port is disposed 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 disposed 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, in which at least one group of control components is arranged, and 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 and recovery port through a launch and recovery pipe, 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 attraction generated between the electromagnet and the magnetic induction coil assembly is used to store energy for the spring, which is used as the launch energy of the conductive particles, and the conductive particles are recovered by the attraction 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 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 coaxial 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 and recovery pipeline, close to the launch valve and 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 includes 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 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 aforementioned composite conductive particle launcher for micro- and nano-crushed wood fibers controls the pressure required to open and close the launch and recovery valve, ensuring that the pressure provided by the air storage device remains constant. Furthermore, the launch and recovery valve opening is coaxial with the launch chamber during each launch, thereby ensuring the stability of each launch speed. The launch and recovery control device utilizes energy conversion, achieving the launch and recovery of conductive particles through different operating states of the electromagnets. The current is varied to accommodate conductive particles of varying diameters and launch chamber 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 in the present invention utilizes the conversion of electromagnetic and mechanical energy as launch energy for activation, imparting an initial velocity to the conductive particles before acceleration. This avoids the complexity and precision of pneumatic activation. By supplying a constant current, the launcher maintains the same initial velocity for each launch of the conductive particles. Energy consumption is low, and launch time is short, taking only a few to ten milliseconds. The initial velocity can be adjusted by varying the current, making it suitable for both variable-speed and variable-pitch launches. The air supply system is equipped with a two-stage pressure-reducing valve with adjustable output pressure. By selecting the appropriate output pressure based on the diameters of the pulverizing cavity and the launch cavity, the launch recovery valve port is consistently coaxial with the launch cavity during each launch, ensuring consistent launch speed. The launcher is positioned on the outer ring of the annular pulverizing cavity and launches along a tangential direction of the cavity pipe. Due to the large-diameter, low-curvature annular pulverizing cavity and the presence of a gravity device, the conductive particles do not need to adhere to the wall. After launch, they rapidly move along the predetermined trajectory of the annular pulverizing cavity.

[0023] 2. The symmetrical launching and recovering device proposed in the present invention has the same structure as the launching valve and the recovering valve, 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 to enable the micro-nano pulverization of wood fibers to 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 decelerate 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 to the outer ring of the annular pulverization cavity and do not need to rise and fall. Only the control system needs to control the opening and closing of the launching valve and the recovering valve.

[0024] 3. The launching device of the present invention uses the mutual conversion of electromagnetic energy and mechanical energy to achieve launching. Its working process is to generate a magnetic field by passing current in the same direction into the two electromagnets in the conductive particle bin. Using the theory of opposites attract, an attractive 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 attractive 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, 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 This is a schematic diagram of the overall structure of the composite conductive particle emission device for micro-nano crushing of wood fibers proposed in the present invention;

[0027] Figure 2 This is the main view of the composite conductive particle emission device for micro-nano crushing of wood fibers;

[0028] Figure 3 This is a side view of a composite conductive particle emission device for micro- and nano-fragmentation of wood fibers;

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

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

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

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

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

[0034] 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, two-stage 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 inlet pipe, 16, second launch air inlet 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 inside the launch chamber, 34, launch recovery pipeline. DETAILED DESCRIPTION

[0035] It should be noted that the following detailed description is illustrative and is 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 meaning as 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 clearly indicated 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 "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations;

[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, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0038] As described in the background art, 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 is consumed in the process of wood fiber micronization. When preparing micronized wood fiber powder by mechanical methods, a mechanical grinder with a higher rotation speed is required. A large amount of heat is generated during the mechanical crushing process, causing the wood fiber to gelatinize. Considering the heat dissipation problem, a large amount of solvent needs to be added during the crushing process, resulting in irreversible energy consumption. This embodiment addresses the problems existing in the magnetic crushing device, production tower and processing system for dry processing of wood fiber micronization during the starting process of conductive particles. It innovates the existing starting method and overcomes the difficulty of providing the initial velocity before acceleration in existing professional equipment, and the problem that some conductive particles cannot obtain the initial velocity. The present invention discloses a composite conductive particle launcher for wood fiber micronization and crushing. It uses electromagnetic energy and mechanical energy as the launch energy. The conversion of electromagnetic energy and mechanical energy in the launch cavity drives the conductive particles to achieve directionally launched along the cavity, so that the conductive particles have a uniform initial velocity, and the electromagnetic drive 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. It solves the problem that the conductive particles are difficult to obtain the initial velocity before the crushing work begins, so that the conductive particles have a uniform initial velocity, which has good practical utility and engineering application value. Among them, the conductive particle launcher for micro-nano dry processing of wood fibers is as follows: Figure 1 As shown, the electromagnetic driving device is able to fully accelerate the conductive particles.

[0040] The composite conductive particle launcher for dry micro-nano processing of wood fibers is composed of an air supply system, a launch control device, a recovery control device, a launch valve, and a recovery valve to achieve the launch of conductive particles. The composite conductive particle launcher for dry micro-nano processing of wood fibers proposed in this patent is based on the theory that like charges repel and opposite charges attract. When the electromagnet is energized, the two ends of the electromagnet with different magnetic properties attract each other, causing the spring to be in a compressed state, converting the electromagnetic energy 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 achieving the launch of the 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 into 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 wood fiber micro-nano crushing process.

[0041] The above-mentioned composite conductive particle launch device for micro-nano dry processing of wood fibers 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 launch and recovery process is more automated, allowing the electromagnetic drive device to 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 with reference to the accompanying drawings:

[0043] Example 1

[0044] First, the launching device of the uniformly distributed large-diameter magnetic crushing equipment 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, and two or three valves can 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 launch valve and a recovery valve are symmetrically arranged in the circumferential direction of the closed annular crushing cavity and along the direction tangent to the axis of the closed annular crushing cavity. Specifically, the axis of the valve openings of the launch valve and the recovery valve are tangent to the axis of the closed annular crushing cavity. The launch valve and the recovery valve are pneumatically controlled and are connected to the same air supply system. A launch control device is arranged at the launch valve, and a recovery control device is arranged at the recovery valve. Specifically, the launch recovery pipeline 34 of the launch control device and the recovery control device is in a coaxial position with the valve openings of the launch valve and the recovery valve, and is connected to the outer wall of the launch valve and the recovery valve. Specifically, the launch control device and the recovery control device are fixed in position, the launch device support seat and the gas storage device support frame are in the same horizontal plane, the launch control device and the recovery control device have the same structure, and therefore can be converted into each other, and can both be used as a launch chamber and a recovery chamber.

[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. 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 inlet pipe 15 and a second launch air inlet 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 provided on the side wall of the annular crushing cavity 12, and a launch recovery port 20 is also provided on the valve body 21. By controlling the movement of the valve core 19, whether the two launch recovery ports are connected can be controlled. 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; as 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, completing the subsequent launch process.

[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 quality of the recovered particles meets the standards for the next continuous processing. If the quality is insufficient, they are supplemented.

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

[0051] It includes 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 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 and rear ends 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 pipe 33, the launch recovery pipe 34 is coaxially installed with the launch chamber 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 components formed by the front end electromagnet 24 and the front end magnetic induction coil 23, and the rear end electromagnet 25 and the rear end magnetic induction coil 26 generate attraction when the same direction of current is passed through, 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 components stop being energized, the attraction disappears, and the spring is in an extended state, converting the mechanical potential energy into kinetic energy of the conductive particles, thereby realizing the emission of conductive particles; during the recovery process, the two electromagnet components 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 conductive particles; the launch chamber 2 is fixed by the launch chamber support seat 1, and the bottom surface of the support seat 1 and the bottom surface of the gas storage device support frame 9 are in the same plane.

[0052] Specifically, the magnetic induction coils 23 and 26 are supplied with current in the same direction, giving a magnetic field 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, the electromagnet compresses the spring. During the recovery operation, the front electromagnet 24 adsorbs the conductive particles thereon. During the emission operation, the two electromagnets are de-energized, and the spring releases potential energy, pushing the front electromagnet 24 forward along the emission recovery pipe 34. The energy is converted into kinetic energy of the conductive particles adsorbed by the front electromagnet 24, thereby launching the conductive particles. At this time, the emission recovery port 20 on the emission valve is closed. It is connected to the launch recovery pipeline and is closed immediately after the launch is completed to ensure that the annular crushing cavity is well sealed. 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 adsorbs 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 feedback information is sent to the control system to terminate the subsequent magnetic acceleration process and repair the problem with 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 hardness 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 pulverization is derived from hardwood wood fibers (for example: redwood, oak, etc.), the hardness is large, and the launch device selects conductive particles with larger particle size and higher hardness; when the micro-nano pulverization is derived from softwood wood fibers (for example: fir, white pine, etc.), the launch device selects conductive particles with smaller particle size to achieve adaptive micro-nano pulverization 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 is 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, which has good magnetic conductivity and low residual magnetism, can be magnetized and demagnetized quickly, 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 components not mentioned above 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-chamber and multi-magnetic plate launch chamber of the conductive particle launch device for micro-nano pulverization of wood fiber 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, each of which is equipped with a set of front electromagnets 29, front magnetic induction coils 28, springs 30, rear magnetic induction coils 31, rear electromagnets 32, and a launch bay pipe 33. The multiple independent launch bays 27 are connected to the same launch recovery pipe 34, that is, multiple groups of the 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 electromagnet 29 and a rear electromagnet 32 ​​are arranged along the axial direction of the launch chamber pipe 33. The two electromagnets are both dumbbell-shaped and coaxial with the chamber; a front magnetic induction coil 28 is wound around each front electromagnet 29; a rear magnetic induction coil 31 is wound around the rear electromagnet 32; the front electromagnet 29 and the front magnetic induction coil 28, the rear electromagnet 32 ​​and the rear magnetic induction lines When the same direction of current is passed through the assembly formed by the loop 31, an attractive force is generated to compress the spring 30, converting the electromagnetic energy into the mechanical potential energy of the spring, storing 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, converting the mechanical potential energy into the 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 30 returns to the compressed state, and the attractive force generated by the front electromagnet 29 adsorbs the conductive particles, thereby realizing 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 and recovery pipes 34 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 corresponding to the 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 selected and coordinated 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 launch chamber of the conductive particle launch device for micro-nano pulverization of wood fibers are independent of each other and do not affect each other; the existence of the multi-bin and multi-magnetic plate launch chamber avoids the need to refill the conductive particles after each pulverization, greatly improving the efficiency of micro-nano pulverization of wood fibers.

[0070] It should be noted that this launch device is not limited to systems for crushing wood fibers. Using the same launch 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: Includes air supply system, launch control device, recovery control device, launch valve and 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 recovery valve have the same structure, each comprising 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 disposed inside the valve body, and the valve core moves in an arc within the valve body; a launch recovery port is disposed 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 disposed on the side wall of the valve body, and the first air inlet pipe and the second air inlet pipe are connected to an 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, in which at least one group of control components is arranged, and 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 and recovery port through a launch and recovery pipe, 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 attraction generated between the electromagnet and the magnetic induction coil assembly is used to store energy for the spring, which is used as the launch energy of the conductive particles, and the conductive particles are recovered by the attraction 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 according to 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 according to 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 according to 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 coaxial with the launch and recovery pipe.

5. The composite conductive particle emission device for micro-nano crushing of wood fibers according to claim 1, characterized in that: A speed measuring device is installed 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 according to claim 1, characterized in that: 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 air storage device provides energy for the opening and closing of the emission 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 according to claim 6, characterized in that: An air pressure sensor is installed in the air storage device to monitor the pressure status of the air storage device in real time.

8. The composite conductive particle emission device for micro-nano crushing of wood fibers according to 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 according to claim 1, characterized in that: The recovery valve includes multiple recovery valves, which are arranged along the circumferential direction of the closed annular crushing cavity. The axis of the emission recovery port of each recovery 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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