CN114344783A - Electromagnetic coil multi-load parallel throwing device based on pulse excitation - Google Patents
Electromagnetic coil multi-load parallel throwing device based on pulse excitation Download PDFInfo
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- CN114344783A CN114344783A CN202210036116.5A CN202210036116A CN114344783A CN 114344783 A CN114344783 A CN 114344783A CN 202210036116 A CN202210036116 A CN 202210036116A CN 114344783 A CN114344783 A CN 114344783A
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- 230000005284 excitation Effects 0.000 title claims abstract description 30
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000004146 energy storage Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 10
- 239000000969 carrier Substances 0.000 abstract description 6
- 239000003721 gunpowder Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000000819 phase cycle Methods 0.000 description 2
- 230000002051 biphasic effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
The invention discloses a pulse excitation-based electromagnetic coil multi-load parallel throwing device. The method comprises the following steps: the device comprises a plurality of throwing channels, and a driving structure, an electromagnetic coil and a carrier which are arranged in each throwing channel; the driving structures in all throwing channels are connected to a power supply module; the driving structure receives pulse excitation and sends the pulse excitation to the electromagnetic coil, and the electromagnetic coil generates ampere force to push the carrier to accelerate by utilizing the pulse excitation. The invention can put more loads at the same time, has larger coverage area and higher fire extinguishing efficiency; the electromagnetic throwing mode uses electric energy as primary energy, is safe and controllable, has controllable outlet speed of thrown load, is convenient for adjusting throwing distance, and can be flexibly adjusted according to the fire scene condition; the fire extinguishing agent carrier has great advantages in scenes such as forest fire extinguishing, grassland fire extinguishing and the like which need to be put in fire extinguishing agent carriers in a large area or at fixed points, and solves the problems of low single-channel putting efficiency and potential safety hazards caused by high-pressure gas and gunpowder.
Description
Technical Field
The invention relates to the technical field of fire fighting, in particular to a pulse excitation-based electromagnetic coil multi-load parallel throwing device.
Background
In recent years, research on the putting mode of fire extinguishing agent carriers has been greatly advanced, the range and the weight of the fire extinguishing agent carriers are continuously increased, but problems still exist in practical application, such as: the fire extinguishing efficiency of single-shot putting is not high, the fire extinguishing coverage area of single-shot putting is not enough, and the putting distance is inconvenient to adjust.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the electromagnetic coil multi-load parallel throwing device based on pulse excitation, a large amount of fire extinguishing agent loads are thrown by utilizing a plurality of throwing channels simultaneously, and the device has great advantages in scenes such as forest fire extinguishing, grassland fire extinguishing and the like needing to throw fire extinguishing agent carriers in a large area or at fixed points.
In order to achieve the purpose, the invention provides the following scheme:
a pulse excitation-based electromagnetic coil multi-load parallel throwing device comprises a plurality of throwing channels, and a driving structure, an electromagnetic coil and a carrier which are arranged in each throwing channel; the driving structures in all the throwing channels are connected to a power supply module;
the driving structure is used for receiving the electromagnetic coil sent by the pulse excitation, and the electromagnetic coil is used for generating ampere force to push the carrier to accelerate by utilizing the pulse excitation.
Optionally, the expansion mode of the launching channel is linear expansion or expansion along the circumferential direction.
Optionally, the driven structure is in single phase, biphasic, triphasic form, or multiphasic form.
Optionally, the power module adopts a pulse capacitor, a pulse generator or a flywheel energy storage pulse power supply.
Optionally, the driving structures in all the throwing channels are connected to one power module in a serial, parallel or series-parallel mixed mode.
Optionally, the driving structure is coaxially and parallel arranged with the housing corresponding to the throwing channel.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the electromagnetic coil multi-load parallel throwing device based on pulse excitation can throw more loads at the same time, the coverage area is larger, and the fire extinguishing efficiency is higher; the electromagnetic throwing mode uses electric energy as primary energy, is safe and controllable, has controllable outlet speed of thrown load, is convenient for adjusting throwing distance, and can be flexibly adjusted according to the fire scene condition; the fire extinguishing agent carrier has great advantages in scenes such as forest fire extinguishing, grassland fire extinguishing and the like which need to be put in fire extinguishing agent carriers in a large area or at fixed points, and solves the problems of low single-channel putting efficiency and potential safety hazards caused by high-pressure gas and gunpowder.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic cross-sectional view of a pulse excitation-based electromagnetic coil multi-load parallel delivery device according to an embodiment of the invention;
FIG. 2 is a schematic diagram of an arrangement of rectangular load launching channels;
fig. 3 is a schematic diagram of an arrangement of hexagonal load launching channels;
FIG. 4 is a schematic diagram of hexagonal load launching channels arranged along the circumferential direction;
FIG. 5 is a schematic diagram of a series current path of the drop channel;
FIG. 6 is a schematic diagram of parallel current paths of the drop channels;
fig. 7 is a schematic view of a driving side current topology series structure of a drop channel;
fig. 8 is a schematic view of a current topology parallel structure of a driving side of a drop channel;
FIG. 9 is a schematic diagram of a driving side current topology series-parallel hybrid structure of a launch channel;
fig. 10 is a load speed curve in the case of the series circuit configuration.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a pulse excitation-based electromagnetic coil multi-load parallel throwing device, which has great advantages in scenes such as forest fire extinguishing, grassland fire extinguishing and the like needing large-area or fixed-point throwing of fire extinguishing agent carriers by utilizing a plurality of throwing channels to throw a large amount of fire extinguishing agent loads simultaneously.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the multi-load parallel throwing device based on pulse excitation provided by the invention comprises a plurality of throwing channels 1, and a driving structure 2, an electromagnetic coil 3 and a carrier 4 which are arranged in each throwing channel; the drive structure 2 in all the launched channels 1 is connected to a power module.
The driving structure 2 sends the electromagnetic coil 3 receiving pulse excitation, and the electromagnetic coil 3 uses the pulse excitation to generate ampere force to push the carrier 4 to accelerate.
The expansion mode of the launching channel 1 can be linear expansion or circumferential expansion. The arrangement mode is matched with the side line of the shell, namely the shell with the quadrangular section can expand along the normal directions of four edges, the shell with the pentagonal section can expand along the normal directions of five edges, and the shell with the circular section can be arranged along the external tangent line, as shown in figures 2-4.
The drive structure 2 in each launch channel 1 may be in single phase, two phase, three phase, multi phase form. For three phases, the coil phases are arranged in A1B1C1 … A2B2C2 …. When the drive structure 2 is in a three-phase drive form; the drive coils 3 were axially aligned in phase sequence A1\ B1\ C1\ A2\ B2\ C2. The flow path of the inter-phase current is from the positive pole of the power supply to A1+ to A1-to A2+ to A2-to the negative pole of the power supply; "Power Positive to B1+ to B1-to B2+ to B2-to Power negative"; "Power Positive to C1+ to C1-to C2+ to C2-to Power negative".
The driving structures 2 in all the throwing channels 1 are connected to a power supply module, and can be connected in series, in parallel or in a series-parallel mixed mode.
The driving structure 2 is connected to a set of power supply modules, the electromagnetic coils of all channels receive pulse excitation simultaneously, and the circuit structure can be a series connection, a parallel connection or a series-parallel connection mixed structure.
As shown in fig. 5 and 7, in the series connection, the current flow path is "from the positive power supply to the drive coil a1+ of the first feeding channel 1#, to the drive coil a1+ of the second feeding channel 2#, to the drive coil a1+ of the third feeding channel 3#, to the drive coil a1+ to … … of the fourth feeding channel 4#, to the negative power supply". The load velocity profile for the series circuit configuration is shown in fig. 10.
As shown in fig. 6 and 8, in the case of parallel connection, taking two layers of channels each having three feeding channels connected in parallel as an example, the current flow path is "a driving coil a1 from the positive electrode of the power supply to the first feeding channel (1#, 7#) of the first layer and the second layer"; a power supply anode to a driving coil A1+ of a second throwing channel (2#, 8#) of the first layer and the second layer; a driving coil A1+ from the positive pole of the power supply to the third throwing channels (3#, 9#) of the first layer and the second layer; all negative pole flows are commonly returned to the power supply negative pole ".
As shown in fig. 9, in the case of the series-parallel hybrid structure, taking two layers of channels each having three feeding channels as an example, the current flow path is "a driving coil a1 from the positive electrode of the power supply to the first feeding channel (1#, 7#) of the first layer and the second layer"; the drive coils A1+ of the first throwing channel (1#, 7#) to the drive coils A1+ of the second throwing channel (2#, 8#) to the drive coils A1+ of the third throwing channel (3#, 9#) to the negative pole of the power supply, namely, the layers are connected in parallel and the layers are connected in series.
The power module adopts a pulse capacitor, a pulse generator, a flywheel energy storage pulse power supply and the like to directly provide electric energy.
The invention provides a pulse excitation-based electromagnetic coil multi-load parallel throwing device, which has the working principle that:
a plurality of coils in every input passageway are a set of, and the different coils of same group carry out the impulse current excitation according to different chronogenesis to produce the travelling wave magnetic field in the space, input load shell can produce the induction vortex in the travelling wave magnetic field of change, according to ampere's theorem, the electrically conductive object through the electric current can receive the electromagnetic force in the magnetic field, the atress direction complies with the right-hand rule, consequently according to above theorem and principle, the object can receive axial direction's propulsive force, input load accelerates under the effect of axial thrust, reach the purpose of input load.
When an object passes through a space magnetic field, the stress of a certain point on the surface of the object is as follows:
wherein,
is a radial magnetic field at a certain current element on the object,
is a tangential current element somewhere on the object,
is the axial force that the current element receives in the magnetic field.
The specific embodiment is as follows:
the driving structure adopts an asynchronous type propulsion mode, each driving structure comprises six driving coils which respectively correspond to A1B1C1A2B2C2 in the three-phase coils, and the electromagnetic coils are axially arranged according to the phase sequence. The shell of the throwing channel adopts a shell with a regular hexagon section, one throwing channel is taken as a center, 6 throwing channels are outwards expanded along the circumferential direction of the channel, the driving structures are fixed in the throwing channels, the glass fibers and the epoxy resin are used for impregnation and fixation, and the coaxial parallel arrangement of each driving structure and the shell of the throwing channel is ensured. The drive structures in all launched channels are connected in series as described above to a power module. And placing the carrier to be thrown in a driving coil in a throwing channel, wherein the initial position is fixed. The power module adopts a pulse capacitor to supply power, and the pulse capacitor is charged by a charger. The high-voltage switch is used for controlling the discharge time sequence of the pulse capacitor, one high-voltage switch is used for each phase of coil circuit, and three high-voltage switches are used for controlling the switching of the circuit. And after the pulse capacitor is charged and reaches the set voltage amplitude, triggering the high-voltage switch to discharge. Pulse excitation is applied to all driving coils of the six throwing channels according to time sequence, the projectile load mass of the six channels is set to be 2kg, the power supply module comprises a 600uF capacitor, and the voltage amplitude is set to be 10 kV. The calculation results show that the outlet speed of the projectile load can be about 58 m/s.
The invention can expand the throwing channels, change the topological structure of the circuit, simultaneously apply pulse excitation to the driving coils in different throwing channels, simultaneously throw a plurality of loads, autonomously control the outlet speed of load throwing by adjusting the primary energy scale, capacitance, voltage amplitude and other parameters in the circuit, enable the load quality to be adjustable and the load outlet speed to be adjustable, and control the throwing distance of the load to carry out fixed-point throwing according to actual needs.
Compared with the prior art, the invention has the advantages that:
(1) the invention adopts electric energy as primary energy, and has higher safety compared with pneumatic feeding and gunpowder feeding.
(2) The invention can realize the infinite expansion of the throwing channel and can throw a large amount of loads at the same time.
(3) Compared with gunpowder or pneumatic feeding, the electromagnetic feeding mode has higher effective load quality.
(4) The invention can more accurately control the shooting and outlet speeds of the armature.
(5) The method can control the load throwing distance more accurately, and has higher throwing precision compared with the traditional mode.
(6) Compared with a single-channel electromagnetic throwing mode, the electromagnetic throwing type power supply system has the advantages that the number of the power supply modules is reduced under the condition that the same load number is thrown, the system operation is simpler and more convenient, the system scale is reduced, the transportation is convenient, and the flexibility is increased.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. A solenoid coil multi-load parallel throwing device based on pulse excitation is characterized by comprising: the device comprises a plurality of throwing channels, and a driving structure, an electromagnetic coil and a carrier which are arranged in each throwing channel; the driving structures in all the throwing channels are connected to a power supply module;
the driving structure is used for receiving the electromagnetic coil sent by the pulse excitation, and the electromagnetic coil is used for generating ampere force to push the carrier to accelerate by utilizing the pulse excitation.
2. The electromagnetic coil multi-load parallel delivery device based on pulse excitation according to claim 1, wherein the delivery channel is expanded in a linear or circumferential manner.
3. The multi-load parallel delivery device for electromagnetic coils based on pulse excitation according to claim 1, wherein the driven structure is in a single phase, a two-phase, a three-phase form or a multi-phase form.
4. The electromagnetic coil multi-load parallel throwing device based on pulse excitation according to claim 1, wherein the power module adopts a pulse capacitor, a pulse generator or a flywheel energy storage pulse power supply.
5. The multi-load parallel delivery device for electromagnetic coils based on pulse excitation according to claim 1, wherein the driving structures in all the delivery channels are connected to one power module in a serial, parallel or a combination thereof.
6. The multi-load parallel delivery device for electromagnetic coils based on pulse excitation according to claim 1, wherein the driving structure is arranged coaxially and in parallel with the housing corresponding to the delivery passage.
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| CN202210036116.5A CN114344783B (en) | 2022-01-12 | 2022-01-12 | Electromagnetic coil multi-load parallel throwing device based on pulse excitation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115465466A (en) * | 2022-09-27 | 2022-12-13 | 武汉大学 | Electromagnetic transmitting method and system for unmanned aerial vehicle group |
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| US4967639A (en) * | 1982-07-15 | 1990-11-06 | Westinghouse Electric Corp. | Rapid burst firing electromagnetic launcher |
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2022
- 2022-01-12 CN CN202210036116.5A patent/CN114344783B/en active Active
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| US4967639A (en) * | 1982-07-15 | 1990-11-06 | Westinghouse Electric Corp. | Rapid burst firing electromagnetic launcher |
| US4986160A (en) * | 1982-11-22 | 1991-01-22 | Westinghouse Electric Corp. | Burst firing electromagnetic launcher utilizing variable inductance coils |
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| CN110917538A (en) * | 2019-11-04 | 2020-03-27 | 武汉大学 | Intelligent unmanned electromagnetic ejection fire extinguishing bomb fire-fighting system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115465466A (en) * | 2022-09-27 | 2022-12-13 | 武汉大学 | Electromagnetic transmitting method and system for unmanned aerial vehicle group |
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