Portable magnetic separating and combining device

Abstract

The utility model belongs to the field of lifting, pulling and traction tools, and relates to a full-automatic device which can move freely and can be connected and separated actively. A self-suction electromagnet is used as a main component, a handle, a traction wire, a convex suction ball and the like are used as auxiliary accessories, and the tool is used in different application scenes after being assembled. One or more self-attraction electromagnets, a battery and a boosting module are electrically connected to form a small device. The self-attraction electromagnet has the characteristic of attracting iron materials, and can attract iron objects to achieve the purpose of connection on the premise that the self-attraction electromagnet is not powered on. When the battery is boosted to supply power to the coil in the self-attraction electromagnet, the self-attraction electromagnet is demagnetized and does not attract an iron object, so that the self-attraction electromagnet is separated from the iron object. The device not only can be moved at will and is convenient to carry, but also can be used for automatically connecting or separating lifted, pulled and pulled objects in a mechanical mode, and meanwhile, products of different models of 5-500 kilograms and above can be selected for use according to application requirements.

Description

Technical Field

[0001] The utility model relates to a portable device in the field of lifting, pulling, traction and fastening tools, in particular to a fully automatic tool which can be moved at will and actively connected and separated. Technical Background

[0002] At present, the lifting, pulling, traction and fastening tools used for objects and animals that are not fixed in position and below a certain weight and pulling force value all require manual connection and physical connection methods to achieve the connection and separation of the traction tool and the connected object. Especially when the application scenario requires frequent connection and separation of the connected object, people have to manually operate the above two actions, which is inconvenient and inefficient. Summary of the invention

[0003] In order to overcome the shortcomings of the background technology of low efficiency and inconvenience in manually connecting and disconnecting objects to be lifted, pulled or towed, the utility model provides an automatic device that can not only be moved at will and easy to carry but also can automatically connect and disconnect objects to be lifted, pulled or towed in a mechanical manner.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a small device is formed by one or more self-priming electromagnets, a power supply battery and a boost module. The self-priming electromagnet has the characteristic of attracting iron materials, and can attract iron objects without power to achieve the purpose of connection. When the coil inside the self-priming electromagnet is powered by a battery boost, the self-priming electromagnet is demagnetized, and the iron object is not attracted, so that it is separated.

[0005] The beneficial effects of the utility model are: 1. Wide application range, 2. Suction force value can be designed according to functional requirements, 3. Low energy consumption and long endurance time, 4. High safety performance, 5. Reliable performance and long service life, 6. The appearance can be designed according to requirements.

[0006] The various beneficial effects are described in detail below.

[0007] 1. Wide range of applications:

[0008] The small device made by the utility model using different combinations of appearance and suction force value can be used in different application scenarios. The following lists 9 typical devices of this type and their applicable application scenarios.

[0009] ①. Animal tractor: A self-priming electromagnet is connected to a handle with a traction rope with an internal wire (a battery, a boost module and a switch are installed inside the handle). These parts are assembled into an active connection end (hereinafter referred to as the active end). An iron object is used as a passive connection end (hereinafter referred to as the passive end) and is hung on the animal collar-type chest harness. When connecting the animal, when the self-priming electromagnet at the active end is placed close to a certain distance from the passive end, the active and passive ends are automatically connected. When the animal needs to be released, press the switch on the surface of the active end handle, and use the battery to power the self-priming electromagnet to demagnetize it, so that it does not attract iron objects (passive end), thereby automatically separating the active and passive ends.

[0010] ②. Child lifting and pulling device: When a child is learning to walk, wear a chest harness on his body, and install an iron passive end on the back of the chest harness. After the active and passive ends are attracted, an adult holds the lifting and pulling device to help the child learn to walk and prevent him from falling and getting injured. When it is necessary to release and separate, just press the handle switch.

[0011] When an adult takes a child out for a walk in a crowded place, the adult can hold the traction device which can automatically extend and shorten the traction rope, and can control the distance with the child at will and prevent the child from getting lost.

[0012] ③. Patient anti-fall puller: At present, when patients recover their walking ability during the rehabilitation period, they are all supported by people or use four-legged support equipment to recover their walking training. If the patient wears a waist and chest harness with a passive end, and closes the active end on the upper hanging slide, the patient can complete the walking exercise by himself, and can operate the connection or separation of the anti-fall hanging rope by himself, so as to prevent falling during walking training.

[0013] ④. Manhole cover puller: At present, the manhole covers on municipal roads are all made of cast iron. When workers need to open and close the manhole covers when inspecting underground lines or checking the conditions in the well, they all use iron hooks to pull them up. Before pulling up the manhole cover with an iron hook, the hook head needs to be inserted into the small hole of the manhole cover and then the manhole cover is pulled open. When closing the manhole cover, a set of reverse actions are required when opening the manhole cover, which is very inconvenient to operate. If a puller is used, it is only necessary to suck the active end to the surface of the manhole cover to complete a series of operations of sucking, pulling to open the cover, and closing the cover. Greatly improve work efficiency and convenience.

[0014] ⑤. Steel and iron object carrier: At present, when manpower is used to carry steel and iron objects of a certain weight, both hands are required to grasp, hold, and support them. This method of force not only limits the weight of the objects to be carried, but also has the risk of slipping and causing accidents. If the self-priming electromagnet, battery, boost module and handle are made into an integral device (without a traction rope) to attract steel and iron objects (the steel and iron objects are the attracted ends), this device uses the lifting force to carry steel and iron objects, which improves the lifting power of the human body while eliminating the hidden danger of accidents caused by the heavy objects slipping when carrying them by hand.

[0015] The carrier with a flat design and self-priming electromagnet suction end face can be used to transport flat steel and iron plates. The carrier with a self-priming electromagnet with an adjustable arc suction end face design can be used to transport round tubes and cylindrical steel and iron objects of different diameters.

[0016] This type of carrier is only suitable for transporting iron objects and martensitic steel, because austenitic steel has only weak magnetic conductivity and is not easily attracted by the carrier to generate a strong suction force.

[0017] ⑥. Poultry and livestock hanger: When slaughterhouses process poultry and livestock meat, whether it is manual processing or assembly line processing, poultry and livestock need to be frequently hung and removed. If the passive end equipped with a meat hook is hung on the body of poultry and livestock, and the active end hanging above is adsorbed, frequent hanging and removing operations can be easily achieved.

[0018] ⑦. Electromagnetic handcuffs: A pair of electromagnetic handcuffs consists of two independent wrist ring cuffs, one of which is equipped with a battery, a boost module, a remote control switch and a self-priming electromagnet. The other cuff is equipped with a passive end. The user's hands can be handcuffed without power. When the remote control switch is pressed, the two cuffs can be demagnetized and separated. This type of electromagnetic handcuffs can be used in daily police work. It can also be used when transferring the user to a different location. The location to be transferred can be pre-installed with the main and passive connection ends that match the electromagnetic handcuffs to fix the user at this location. This solves the efficiency and convenient operation problems of frequently locking and opening ordinary handcuffs.

[0019] ⑧. Tower Crawler: Currently, when workers go up and down high towers (such as tower cranes or high-voltage power towers, etc.), the hooks on the safety harness need to be manually removed and re-hung every few floors. If a safety lanyard with an active end is used to perform a cyclic layer-shifting operation to attract and detach the tower (the tower is the passive end), the climbing speed and convenience of going up and down high towers will be greatly improved.

[0020] ⑨. Crawling suction cup: If a person needs to climb up and down a high steel or iron wall, the utility model can be used as a crawling tool by simply designing the utility model into a circular plane suction cup.

[0021] In summary: the products designed and manufactured with different shapes and suction force values ​​based on the principle of opening and closing of the utility model can meet the use requirements of various application scenarios. The above only cites some typical application scenarios to illustrate that the utility model has a wide range of applications.

[0022] 2. The suction force value can be designed according to functional requirements:

[0023] The various lifting, pulling, traction and fastening devices listed in the above application scope can meet the design requirements of different suction force values ​​of various devices.

[0024] Various devices in different application scenarios can be designed and manufactured with an independent or multiple combined self-priming electromagnets according to their respective suction force requirements, and can achieve suction force standards of 5kg-500kg and above.

[0025] 3. Low energy consumption and long battery life:

[0026] If the utility model uses an ordinary electromagnet as the attraction end of the active end, it needs to be powered on for a long time during the entire use process after the passive end is attracted (the ordinary electromagnet is magnetic when powered on and has no magnetism when powered off), which not only consumes a lot of electric energy, but also the small battery cannot meet its power consumption, and normal use cannot be achieved.

[0027] The utility model uses a self-priming electromagnet as the suction end, which does not require electric energy to maintain when not in use or in normal use. Electric energy is only used briefly when operating to separate the active and passive ends, and the power-on time required for each separation operation is ≤1 second.

[0028] The utility model adopts a lithium battery to boost the voltage and then supply power to the self-priming electromagnet. According to calculation and experiment, a 18650 lithium battery with a normal capacity can be used as a power source to meet the power demand for several months.

[0029] In summary: the utility model consumes less electricity, has obvious energy-saving effect, and has a long battery life. The small-volume lithium battery meets the power supply demand while occupying a small space of the device, which can make the overall device miniaturized and easy to carry.

[0030] 4. High safety performance:

[0031] ① The self-priming electromagnet at the active end of the utility model is made of a metal shell and is potted with resin glue inside, so it has strong waterproof, fireproof and anti-destruction capabilities.

[0032] ②. The utility model uses a voltage below 24 volts as the working voltage and control voltage, and is a weak current product, so it will not cause electric shock hazards to the human body.

[0033] ③. When the utility model is applied in different scenarios, products that meet the suction force requirements are selected, and there is no risk of the active and passive ends being forced to disconnect.

[0034] 5. Reliable performance and long service life.

[0035] According to data, the Sanhuan Research Institute spent 4441 days (more than 12 years) measuring and recording the sintered NdFeB magnets without coating protection installed inside the self-priming electromagnet. According to the experimental conclusions, the flux loss in 30 years is less than 1%, the flux loss in 50 years is 1.3%, and the flux loss in 2% corresponds to about 150 years. The above data show that sintered NdFeB has a long service life, which is sufficient to meet the use of the utility model. In addition, the neodymium magnet installed inside the electromagnet is protected by a coating, sealing resin glue and the electromagnet shell and is not exposed to the atmosphere, so there is no risk of corrosion and oxidation, and it will not be broken or smashed.

[0036] In order to prevent the demagnetization of the NdFeB magnet installed in the self-priming electromagnet of the utility model, two points can be done to ensure its long-term use:

[0037] First, NdFeB magnets have a demagnetization temperature: the NdFeB magnets installed in the sample are H series brands, and their demagnetization temperature is above 120°C. As long as the self-priming electromagnet is not maliciously heated and damaged when using the utility model, and the overload voltage and current do not cause the temperature rise to exceed 120°C, it will not be demagnetized and the suction force will be reduced. For controlling the temperature rise, installing a boost module with over-temperature and over-current protection in the circuit can solve this hidden danger.

[0038] Application scenario If the utility model needs to be used in a high temperature environment, it can be solved by replacing other brands of neodymium iron boron magnets and upgrading the self-priming electromagnet. The maximum operating temperature of the AH series of neodymium magnets of various brands can reach 220℃.

[0039] Second, when the internal coil of the self-priming electromagnet is energized, the iron core generates a reverse magnetic field strength. As long as it does not exceed the intrinsic coercive force of the NdFeB magnet inside the self-priming electromagnet, it will not demagnetize. The H series NdFeB magnet installed in the sample has an intrinsic coercive force value of 17KOe (kilo-Oersted). If the application scenario requires a NdFeB magnet with a higher intrinsic coercive force value, it can be replaced with an appropriate brand. The AH series NdFeB magnet can reach up to 35KOe (kilo-Oersted). This problem can be controlled by using a boost module with a fixed output voltage in the circuit.

[0040] The boost module with a fixed output voltage value installed in the circuit has overcurrent and overtemperature protection functions, and can also effectively protect the copper enameled wire wound inside the self-priming electromagnet from melting and damage, causing the utility model to fail.

[0041] In summary: the utility model can be used for a long time as long as it is in the specified environment and conditions.

[0042] 6. The appearance can be designed according to requirements:

[0043] According to the various lifting, pulling and traction devices listed in the application scope, the utility model can be designed and manufactured in various applicable forms and colors according to their respective application scenarios and the functions they play.

[0044] In summary, the utility model has obvious beneficial effects.

[0045] The present invention lists nine kinds of lifting, pulling, traction and fastening devices in the above description, but the working principle of each device is relatively abstract and difficult to understand. The following uses an animal traction device as an example to further explain its application scope, innovative design, energy consumption, suction force value and working principle.

[0046] ①. Scope of application of animal traction device:

[0047] Animal traction devices are suitable for all kinds of livestock and wild animals, as well as various domestic pets and working animals. Taking domestic dogs as an example (working dogs and pet dogs are collectively referred to as domestic dogs), the passive end of the animal traction device is permanently installed on the collar or chest harness of the domestic dog. When the domestic dog needs to be traction, the self-priming electromagnet is automatically attracted and connected when the active end is held close to the passive end. When it needs to be released, the switch on the handle of the active end is pressed to power the self-priming electromagnet to demagnetize the passive end, thereby separating the active and passive ends. This eliminates the need for manual connection and release of domestic dogs. Especially when frequent or urgent connection and release are required, the connection and release efficiency and convenience are greatly improved.

[0048] The animal traction device made based on the principle of the utility model is particularly suitable for blind people. When the blind people lead the guide dog, they do not need to bend down and touch the hanging ring on the guide dog with one hand, and use the other hand to hold the traction rope hook to connect or untie the guide dog. The guide dog can be connected and tied by just bringing the self-priming electromagnet on the active end close to the passive end. When the guide dog needs to be released, there is no need to bend down to operate the above action, and it can be separated and released by pressing the handle switch.

[0049] When police dogs and military dogs need to be released quickly during attack missions, if the handler releases them manually, the release time will be extended, affecting the duration of the attack. Currently, when handlers encounter such situations, in order to quickly release the attacking dog, they generally release the leash and let the attacking dog run and attack with the leash. The interference of the leash may affect the running speed of the attacking dog at the least, and in serious cases, the leash may be entangled by debris on the way, causing the attacking dog to stop or be injured. If an animal leash is used to release the attacking dog, the above problems and hidden dangers can be solved.

[0050] Elderly people and patients who have difficulty bending over or bending their legs find it very laborious and uncomfortable to connect and release small pet dogs because they are close to the ground. Since the person pulling the dog can see the specific position of the passive end, they only need to hold the handle of the active end or the traction rope to suspend the self-priming electromagnet hanging at the top close to the passive end to complete the action of connecting the pet dog. Pressing the handle switch to release the pet dog also eliminates the need for manual operation of bending over or bending the legs.

[0051] Animal traction devices are also suitable for pet owners who are in good health but need convenient traction for their pet dogs.

[0052] ②Innovative design:

[0053] In the early design of animal traction devices, the self-priming electromagnet at the active end and the passive end used circular plane and concave-convex cone shapes as the mutual suction surfaces. These two designs caused the suction of different circular axes (i.e. misaligned suction), resulting in the suction force not meeting the standard. If it was manually corrected to the coaxial position, it would not achieve the design purpose of fully automatic suction. After many failures and adjustments to the experimental products, the innovative concave-convex spherical design was finally adopted to solve the above problems.

[0054] The self-priming electromagnet's suction surface at the active end is designed with a concave spherical surface of a certain curvature, and the suction surface at the passive end is designed with a convex spherical surface of the same curvature. When the self-priming electromagnet is attracted to the suction end, the two suction surfaces are completely fitted to reach the designed suction force value.

[0055] ③. Low energy consumption and long battery life:

[0056] The animal traction device sample made based on the principle of the utility model uses a 18650 lithium battery with a capacity of 3200mAh as a power source (rated voltage is 3.7V). The boost module and the self-priming electromagnet in the circuit other than the battery need a total of 12W of energy to operate normally (the conversion efficiency of the boost module is 88%). The lithium battery stores about 12Wh of electric energy (3.7V×3.2Ah=11.84Wh), which can be used to continuously power the load for about 1 hour (11.84Wh÷12W=0.99h), which is about 3600 seconds. The animal traction device does not need to use electric energy when it is not in use and when the animal is attracted and pulled. It is only powered on when the animal is released, and the power-on time for each time is ≤1 second. If the power consumption time is calculated as 1 second, the 3200mAh lithium battery can be used for 3600 times for the animal traction device. Assuming that the animal traction device is frequently used 10 times a day, it can be used for 360 days. Of course, the lithium battery consumes about 1-2% of its own power every day. If the battery is fully charged and not used, it will be exhausted within 50-100 days. Assuming that 50 days is the shortest period for using the animal tractor, the animal can be released about 70 times a day. This means that the battery's self-consumption is much greater than the normal power consumption of the animal tractor. Therefore, a full charge of the above lithium battery can ensure the normal use of the animal tractor for several months.

[0057] Based on the above data, it can be seen that the animal traction device has low power consumption and long battery life.

[0058] ④. The suction force value can be designed according to the requirements:

[0059] The suction force of the designed and manufactured animal traction device sample is 30 kg. It requires a pulling force greater than 30 kg to force the active and passive ends to separate. Animal traction devices with different suction force values ​​can be designed according to the weight and pulling force requirements of different animals. Using self-priming electromagnets of different specifications, the suction force value can reach 5kg--500kg and above.

[0060] The greater the suction force value of the self-priming electromagnet, the greater its volume and weight. Conversely, the smaller the animal, the more an animal traction device made of a self-priming electromagnet with a small suction force value, volume and weight can be used to meet the needs.

[0061] ⑤. Working principle:

[0062] 1) Components and circuit composition:

[0063] The animal traction device made based on the utility model is composed of a handle, a traction wire and a self-priming electromagnet connected to each other as an active end, and an iron convex round sucked ball as a passive end.

[0064] The handle is equipped with a 18650 lithium battery, a boost module and a touch switch. The traction wire is made of double-layer nylon belt, and a copper wire with thin steel wire is inserted inside. The self-priming electromagnet is connected to the handle with a traction wire as the active end. The convex suction ball with a hanging ring is installed as the passive end.

[0065] The circuit part in the active end is divided into power supply, control circuit and working circuit. The 18650 lithium battery is the power supply in the circuit, the boost module, switch and traction wire belong to the control circuit, and the coil inside the self-priming electromagnet is the working circuit.

[0066] 2) Working principle and function of each component:

[0067] The function of the active end of the animal traction device is to actively attract or separate the passive end to connect and release the animal, and the function of the passive end is to be involuntarily attracted or separated by the active end.

[0068] The self-priming electromagnet is the core component of the utility model. Its working principle and function are as follows: a sintered neodymium iron boron magnet (hereinafter referred to as neodymium magnet) is installed at the rear end of the iron core inside the ordinary electromagnet, and the strong magnetic force of the neodymium magnet itself is used to transmit the magnetic induction intensity to the iron core, so that all the magnetic domains inside the iron core are arranged in axial order, so that the pole surface of the iron core is permanently magnetic. When the end face of the self-priming electromagnet contacts the passive end, it is attracted to achieve the purpose of connection. (At this time, no power is turned on, and the physical properties of the neodymium magnet are used to make the electromagnet output magnetic force to attract the ferrous body). When the coil wound inside the electromagnet is energized, the generated electromagnetism is transmitted to the iron core, causing the magnetomotive force generated inside the iron core to produce another magnetic induction intensity of opposite sign. When this magnetic induction intensity reaches the same or close value as the magnetic induction intensity value generated by the neodymium magnet transmitted to the iron core, the magnetic domains inside the iron core are all arranged in a disordered manner from the original axial order. The iron core pole surface has no magnetic field force output and is in a non-magnetic state, and does not attract the iron body, thereby separating the self-priming electromagnet from the passive end. (This manual "Pages 7 to 9" combined with "Attached Figure 2-1 of the Manual" details the working principle and various technical parameters of the self-priming electromagnet)

[0069] The functions of the handle are: first, the tractor holds the handle to pull the animal, and second, the internal lithium battery uses the boost module to increase the voltage and then supply power to the self-priming electromagnet. The touch switch installed on the surface of the handle is a self-reset type switch. When the switch is pressed, the power is turned on, and when the switch is not pressed, the power is normally turned off.

[0070] The functions of the traction wire are: first, to pull, tug and drag the animal; second, to connect the power source with the self-priming electromagnet with its internal wire to conduct electricity. BRIEF DESCRIPTION OF THE DRAWINGS The animal traction device made based on the principle of the utility model is described in detail below in conjunction with the drawings and embodiments.

[0071] Figure 1 is a schematic diagram of the circuit of an animal traction device.

[0072] FIG. 2 is a structural diagram of a passive end and a self-priming electromagnet embodiment.

[0073] FIG. 3 is a schematic diagram of the handle and internal components.

[0074] FIG. 4 is a schematic diagram of a traction wire.

[0075] FIG. 5 is a schematic diagram of the assembly of the animal traction device.

[0076] FIG. 6 is a six-sided projection diagram of a self-priming electromagnet.

[0077] FIG. 7 is a six-sided projection diagram of the passive end.

[0078] FIG8 is a schematic diagram of the self-priming electromagnet and the passive end.

[0079] Fig. 9 It is a three-dimensional rendering of a self-priming electromagnet and a convex suction ball.

[0080] As shown in the figure: (A) self-priming electromagnet, (B) traction wire, (C) handle, (D) passive end. (1) neodymium magnet, (2) iron core, (3) coil, (4) magnetic pot, (5) resin glue, (6) convex suction ball, (7) hanging ring, (8) touch switch, (9) lithium battery, (10) handle housing, (11) boost module, (12) traction rope, (13) power wire, (14) connecting threaded cap.

[0081] Note: 1) NdFeB magnets are referred to as “Nd magnets”, 2) Self-priming electromagnet cores are referred to as “cores”, 3) Electromagnet shells are referred to as “magnetic pots”,

[0082] 4) 18650 lithium battery is referred to as "lithium battery". DETAILED DESCRIPTION

[0083] Figure 1 Animal traction circuit schematic diagram:

[0084] FIG1-1 is a diagram of the power flow: the electric energy of the lithium battery (9) enters the boost module (11) through the touch switch (8) and finally transmits the electric energy to the self-priming electromagnet (A).

[0085] Figure 1-2 is a circuit diagram: the positive electrode of the lithium battery (9) inputs a voltage of 7.4V into the boost module (11) through the touch switch (8), and the boost module boosts the power to 12V and then transmits it to the self-priming electromagnet (A) for use. The negative electrode of the self-priming electromagnet is connected to the negative electrode of the lithium battery according to the negative end of the above path.

[0086] Note: The rated voltage of one 18650 lithium battery is 3.7V, and the voltage of two batteries connected in series is 7.4V.

[0087] FIG. 2 is a structural diagram of a passive end and a self-priming electromagnet embodiment:

[0088] Figure 2-1 is a cross-sectional view of the internal structure of a self-priming electromagnet in the main viewing direction.

[0089] When no electricity is supplied, the neodymium magnet (1) inside the self-priming electromagnet (A) transmits its strong magnetic field force in the S-pole direction to the concave circular pole surface of the iron core (2), and the pole surface of the iron core (2) is permanently magnetic. When the convex suction ball (6) at the passive end (D) approaches a certain distance from the pole surface of the iron core (2), it is attracted. When attracted, the pole surface of the iron core (2) and the end face of the magnetic pot (4) are completely in contact with the contact surface of the convex suction ball (6), generating a suction force of about 30 kg. (The three contact surfaces are all arcs with equal radius of 20 mm)

[0090] When the coil (3) inside the self-priming electromagnet (A) is energized, the electromagnetic field force generated by the coil (3) causes the iron core (2) to emit a magnetic field force in the N-pole direction toward the pole surface. When this force is close to or equal to the S-pole magnetic field force transmitted from the neodymium magnet (1) to the pole surface of the iron core (2), the two magnetic field forces cancel each other out, and the pole surface of the iron core (2) has no magnetic force output, and the iron convex suction ball (6) is not attracted, showing a separation state.

[0091] In order to ensure the durability of the self-priming electromagnet (A), the iron core (2), the coil (3) and the neodymium magnet (1) in the magnetic pot (4) are fully sealed with resin glue (5) to prevent damage and make the self-priming electromagnet (A) waterproof and fireproof.

[0092] Combined with the structural diagram of the self-priming electromagnet embodiment in FIG2-1, the working principle, technical parameters and calculation of the origin of important data of the self-priming electromagnet (A), the core component of the animal traction device, are described in detail.

[0093] Calculation of the working parameters of self-priming electromagnet (A):

[0094] ① The diameter of the iron core (2) is 16.77 mm, and the radius is 8.385 mm. ② The length of the iron core (2) is 15.49 mm (winding length: 14.6 mm). ③ The number of turns of the coil (3) is 573. ④ The working current is 0.884 A. ⑤ The weight of the neodymium magnet (1) is 6.7 g. ⑥ The magnetic field force generated by the neodymium magnet is 30 kg. ⑦ The electromagnetic field force required to offset the neodymium magnet is ≈30 kg. ⑧ The working air gap of the iron core pole surface is set to δ = 0.035 cm. ⑨ The magnetic permeability of the air is μ0 = 1.25×10 -8 Henry / cm.

[0095] The following uses Kirchhoff's second law and related formulas to calculate the electromagnetic field force generated by the core pole surface after the self-priming electromagnet coil is energized: (The length unit is cm and the area unit is cm in the calculation. 2 )

[0096] 1. Calculate the core pole area S, magnetic permeability μ, magnetomotive force IW and magnetic flux Φ:

[0097] 1. Core magnetic pole area: S = πr 2 =π×8.385 2 =220.9mm 2 =2.21cm 2 (square centimeters)

[0098] 2. Calculate the working magnetic permeability at a distance of 0.035cm from the core pole surface based on S:

[0099] μ=(μ0S) / δ=(μ0×2.21) / 0.035=63.1μ0H / cm (Henry per centimeter)

[0100] 3. Calculate the magnetomotive force IW1 value based on the current and number of turns:

[0101] IW1=IN=0.884×573=506IN(ampere-turns)

[0102] 4. Calculate the work magnetomotive force IW based on the physical magnetomotive force:

[0103] If the core loss and non-working air gap loss are taken into account, the physical magnetomotive force is 25%.

[0104] Work magnetomotive force IW = IW1 × (1-25%) = 506 × 75% = 379.5 IN (ampere-turns)

[0105] 5. Rough calculation of magnetic flux:

[0106] Φ=IWμ10 8 =379.5×63.1μ0×10 8

[0107] =379.5×(63.1×1.25×10 -8 )×10 8 =29933MX (Maxwell)

[0108] 2. Calculate the magnetic resistance and accurately calculate the magnetic flux based on the above data:

[0109] 1. Calculate the magnetic induction intensity B: B = Φ / S = 29933 ÷ 2.21 = 13544 GS (Gauss)

[0110] 2. According to the electrical pure iron BH comparison table, check the magnetic field intensity H corresponding to the magnetic induction intensity B:

[0111]

[0112] 3. Calculate the magnetic circuit length Le: (The magnetic circuit length is the distance from the starting point of the coil to the pole surface of the core)

[0113] The total length of the core is 15.49mm (without frame). The magnetic path length of the core column used for winding is Le = 14.6mm = 1.46cm

[0114] 4. Calculate the magnetic resistance R based on the above data M :

[0115] R M =[HLe / Φ]×10 8 =[(7.66×1.46) / 29933]×10 8 =37362H (Henry)

[0116] 5. Calculate the magnetic flux Φ after taking into account the magnetic resistance δ :

[0117] Φ δ =[IW / (R M +1 / μ)]×10 8 =[IW / (R M +1 / 63.1μ0)]×10 8

[0118] Φ δ =[379.5 / (37362+1 / <63.1×1.25×10 -8 >)]×10 8 =29076MX (Maxwell)

[0119] 3. Calculate the magnetic field force F (attractive force) on the pole surface of the core based on the data in items 1 and 2.

[0120] F=[2×(Φ δ / 5000) 2 ]×(1 / S)=2×(29076÷5000) 2 ×(1 / 2.21)=30.6kg

[0121] That is, after the coil (3) is energized, the electromagnetic field force generated by the iron core (2) is about 30 kilograms.

[0122] According to experimental data, the neodymium magnet (1) inside the self-priming electromagnet (A) has a self-weight of 6.7g and can absorb about 900 times its own weight, about 6kg. However, when it is installed at the rear of the iron core (2), the pole surface can absorb 0.6kg (kilograms) of magnetic conductive material without the magnetic pot (4). Because in both cases, part of the magnetic lines of force complete the magnetic circuit conduction in the air, there is a large amount of magnetic resistance, resulting in the failure to meet the standard of 30kg (kilograms) of the designed suction force of the self-priming electromagnet (A). The iron core (2) with the neodymium magnet (1) installed at the rear is placed in the magnetic pot (4) to complete the assembly of the self-priming electromagnet (A), and the prerequisite for forming a closed magnetic circuit in the magnetic conductive material is met. When the end surface of the self-priming electromagnet (A) (including the pole surface of the iron core (2) and the end surface of the magnetic pot (4)) is attracted by the convex suction ball (6), the magnetic lines of force form a closed loop in the magnetic conductive material. (The direction of magnetic force lines in the magnetic conductive material is: neodymium magnet → iron core → convex suction ball → magnetic pot wall → magnetic pot bottom → neodymium magnet (repeated cycle)), so the self-priming electromagnet (A) can achieve a suction force value of about 30 kg to attract the convex suction ball.

[0123] Principle of closed loop of magnetic lines of force: When the magnetic lines of force circulating in the closed loop of the above-mentioned magnetic conductive material are not attracted by the convex suction ball (6), the magnetic lines of force are disconnected between the pole surface of the iron core (2) and the end surface of the wall of the magnetic pot (4). The magnetic lines of force in this distance are conducted in the air and are in a weak attraction state. After the convex suction ball (6) is attracted, the convex suction ball (6) is used to transfer the magnetic lines of force conducted in the air between the pole surface of the iron core (2) and the end surface of the wall of the magnetic pot (4) to the convex suction ball (6), completing the closed loop of magnetic lines of force in the magnetic conductive material. From the subjective perspective of the self-priming electromagnet (A), it is the convex suction ball (6) that helps it repair the disconnected magnetic lines of force loop. But from the external objective perspective, it is the self-priming electromagnet (A) that has attracted 30 kg of magnetic conductive material.

[0124] Essentially, it is impossible to achieve a suction force of 30 kg by using the pole surface of the self-priming electromagnet (A) alone to attract magnetic materials. The maximum suction force of 30 kg can only be achieved when the area of ​​the attracted magnetic material is greater than or equal to the total area of ​​the surface end of the self-priming electromagnet (A) and reaches a certain thickness.

[0125] Based on the above reasons, it is proved through experiments that the self-priming electromagnet (A) and the convex suction ball (6) are in a connected state when they are attracted. When the coil (3) inside the self-priming electromagnet (A) is energized, the surface end of the iron core (2) generates an electromagnetic field force of about 30 kilograms of opposite sign, which basically balances the magnetic field force transmitted to the iron core (2) by the neodymium magnet, so that the magnetic domain inside the iron core (2) changes from the original axial sequence to disorder, the pole surface of the iron core (2) is in a non-magnetic state (no magnetic field line output), and the function of the convex suction ball (6) to repair the closed loop of the magnetic field line disappears at the same time, which is manifested as the end face of the self-priming electromagnet (A) and the convex suction ball (6) are not attracted, and are in a separated state.

[0126] The neodymium magnet (1) installed inside the self-priming electromagnet (A) is of H series grade, and its intrinsic coercive force value is 17 KOe (kilo-Oersted). After the internal coil (3) of the self-priming electromagnet (A) is energized, the electromagnetic magnetic induction intensity generated is 13500 GS (Gauss), and the corresponding coercive force value is 13.5 KOe (kilo-Oersted), which is 20.6% less than the intrinsic coercive force value of 17 KOe (kilo-Oersted) of the neodymium magnet (1), so the magnetic force of the neodymium magnet (1) will not be weakened or dissipated after long-term use.

[0127] The specifications and dimensions of the self-priming electromagnet (A) are as follows: ① the outer diameter is 33.8 mm, ② the inner diameter is 29.4 mm, ③ the wall thickness of the magnetic pot (4) is 2.2 mm, the bottom thickness is 4 mm, and the total height is 29.83 mm, ④ the diameter of the iron core (2) is 16.77 mm, and the length of the iron core column is 15.49 mm, ⑤ the outer diameter of the neodymium magnet (1) is 25 mm, the inner hole diameter is 7 mm, the thickness is 2 mm, and the weight is 6.7 g. ⑥ the length of the enameled copper wire used in the coil (3) is 36.8 m. ⑦ the pole face of the iron core (2) of the self-priming electromagnet (A) and the end face of the magnetic pot (4) are uniformly concave arc radius of 20 mm. ⑧ the iron core (2) and the magnetic pot (4) inside the self-priming electromagnet (A) are made of iron material.

[0128] Figure 2-2 is a cross-sectional diagram of the internal structure in the main viewing direction of the passive end.

[0129] The passive end (D) is assembled by a convex suction ball (6) with a screw hole and a hanging ring (7) with a screw. The function of the convex suction ball is to be passively attracted or separated by the self-attracting electromagnet (A). The function of the hanging ring is to connect with the animal's neck collar or shoulder strap so that the passive end (D) can be worn on the animal for a long time for the active end to connect and release.

[0130] Specifications and dimensions of the passive end (D): ① The maximum outer circumference of the convex suction ball (6) is 117.3mm, the outer arc radius is 20mm, the cutting angle is 150°, the convex suction ball (6) is 8mm thick, and the center inner screw hole is 5mm deep (thread specification: M4). ② The outer diameter of the hanging ring (7) is 18.5mm, the inner diameter is 11mm, and the length of the hanging ring screw is 5mm (thread specification: M4). ③ The passive end is made of iron material.

[0131] FIG. 3 is a schematic diagram of the handle and internal components.

[0132] In order to more clearly show the various components and layout relationships inside the handle (C), three drawings are drawn in Figure 3, Figure 3-1 is a top perspective view of the handle (C), Figure 3-2 is a main perspective view, and Figure 3-3 is a right perspective view.

[0133] The handle (C) is composed of two lithium batteries (9) installed in series inside the handle housing (10), and a power line is connected to the boost module (11) after passing through the touch switch (8).

[0134] Because the minimum energy requirement for the normal operation of the self-priming electromagnet is 9W. Due to the working parameter limitation of the boost module (11), if the boost module outputs 9W of power to the self-priming electromagnet, it must obtain a power input greater than 18W to meet the load requirements. If a single lithium battery design is used, the lithium battery needs a discharge rate of more than 2C and a voltage of more than 3.7V to enable the load to operate normally, but the lithium battery cannot always be discharged in a fully charged state. Therefore, two lithium batteries (9) are connected in series as the power source of the active end (the voltage after series connection is 7.4V, and batteries with a discharge rate of 1C and above are applicable).

[0135] Specifications and dimensions of the handle (C) and its components: ① The handle housing (10) is 158mm long, 28.6mm in outer diameter, and 0.2mm in wall thickness. ② The touch switch (8) has a touch surface diameter of 14mm, an opening diameter of 12mm, and an upper limit of 2A for current flow. ③ The lithium battery (9) is model 18650, with a capacity of 3200mAh and a rated voltage of 3.7V. ④ The boost module (11) is 33mm long, 17mm wide, and 4mm thick. It can boost the input voltage of 3 to 10V to a fixed output of 12V. ⑤ The handle housing is made of an iron round tube.

[0136] FIG. 4 is a schematic diagram of a traction wire.

[0137] The traction wire (B) is a traction rope (12) through which a power wire (13) is inserted. One end of the traction wire (B) is inserted into the handle (C) to connect to the boost module. The other end is fastened with a connecting threaded cap (14) and then the power wire (13) is connected to the outer guide wire of the self-priming electromagnet.

[0138] The traction conductor (B) is divided into a traction function part and a conductor function part according to its function.

[0139] 1. The traction function part is that one end of the traction rope (12) is inserted into the handle (C) for fastening, and the other end is inserted into the connecting thread cap (14) for fastening. The connecting thread cap (14) is screwed and connected with the convex thread base at the bottom of the self-priming electromagnet by a concave thread, so as to play the role of the traction wire (B) bearing the tension to pull the animal.

[0140] 2. The wire function part is composed of a power wire (13) with one end connected to the output end of the boost module, and the other end passing through the connecting threaded cap (14) and connected to the outer guide wire of the self-priming electromagnet coil to play a conductive role.

[0141] Specifications and dimensions of the components of the traction wire (B): ① The traction rope (12) is 1.35m long and 25mm wide, and is sewn with double-layer nylon tape. ② The power supply wire (13) is 1.3m long, and consists of two 0.2 square copper wires and a 0.3mm diameter plastic-coated steel wire, and the whole is covered with a high-temperature resistant Teflon outer skin. ③ The connecting threaded cap (14) has an outer diameter of 20mm, an inner diameter of 14mm, a height of 20mm, and an inner thread depth of 1mm.

[0142] FIG. 5 is a schematic diagram of the assembly of the animal traction device.

[0143] The active end is assembled by connecting the self-priming electromagnet (A) through the traction wire (B) and the handle (C). The function of the active end is to bear the pulling force of the animal after the passive end (D) is attracted. Second, when the switch on the handle (C) is pressed, the lithium battery and the boost module are used to supply power to the coil in the self-priming electromagnet (A) through the traction wire (B), so that the active end is separated from the passive end (D) to release the animal.

[0144] For detailed working principles and functions of each component, please refer to the relevant instructions on pages 6 to 11.

[0145] Figure 6 and Figure 7 are six-sided projections of the self-priming electromagnet and the passive end respectively.

[0146] If only Figure 2 is used to illustrate the shape of the suction surface of the self-priming electromagnet (A) and the passive end (D), it is easy to cause misunderstanding.

[0147] FIG6 shows the active suction surface composed of the core pole surface of the self-priming electromagnet (A) and the end surface of the magnetic pot, which is a concave semicircular shape of 360 degrees when viewed from above.

[0148] FIG. 7 shows the passive suction surface of the passive end (D), which is a convex semicircular shape of 360 degrees when viewed from above.

[0149] The curvature of the concave-convex circular suction surface can be adjusted according to the functional requirements of the nine devices listed in the application scope of this specification.

[0150] FIG8 is a schematic diagram of the self-priming electromagnet and the passive end.

[0151] This schematic diagram mainly shows the relationship between the self-priming electromagnet (A) and the passive end (D) after being attracted.

[0152] Because the outer contour of the end face of the self-priming electromagnet is a perfect circle, the outer contour of the passive end can only be designed within the range of a perfect circle. If the active and passive suction surfaces are designed in the shape of a circular plane and a circular cone with the same diameter, the self-priming electromagnet and the passive end cannot be suctioned on the same central axis (i.e., misaligned suction), which will cause the suction force to fail to reach the design value. The utility model adopts a design in which the convex suction surface of the passive end is larger than the concave suction surface of the self-priming electromagnet end face (as shown in the figure: when suctioned, a part of the passive end (D) has entered the end face of the self-priming electromagnet). This design allows the user to avoid accurately aligning the active and passive suction surfaces for suction (as long as suction is sufficient). The suction surface of the self-priming electromagnet and the passive end do not need to be manually adjusted when they are suctioned on different central axes. During normal use, as the pulling force increases, the two suction surfaces will slide and automatically adjust to the same central axis position, so that the suction force reaches the maximum value.

[0153] This innovative concave-convex circular suction surface design is an important factor in enabling various devices and animal traction devices made based on the principle of the utility model to achieve the purpose of use.

[0154] Fig. 9 It is a three-dimensional rendering of a self-priming electromagnet and a convex suction ball.

[0155] This figure shows the appearance of the self-priming electromagnet and the passive end, and more clearly shows the shape of the concave circular suction surface of the self-priming electromagnet and the convex circular suction surface of the passive end.

Claims

1. A portable magnetic splitter, comprising a self-priming electromagnet (A), a handle (C), a traction wire (B) and a passive end (D), wherein the self-priming electromagnet (A) is electrically connected to a boost module (11), a touch switch (8) and a lithium battery (9) in the handle (C) through the traction wire (B), and is characterized in that: The handle (C) provides electric energy to the self-priming electromagnet (A) through the traction wire (B); the self-priming electromagnet (A) comprises a neodymium magnet (1), an iron core (2) and a coil (3) arranged in a magnetic pot (4); the neodymium magnet (1) transmits its own strong magnetic field force to the concave circular pole surface of the iron core (2); the pole surface of the iron core (2) is in a permanent magnetic state; the iron core (2) is wound around the coil (3); the coil (3) is electrically connected to the handle (C) through the traction wire (B); in order to ensure the durability of the self-priming electromagnet (A), the iron core (2), the coil (3) and the coil (3) in the magnetic pot (4) are connected to the handle (C); The neodymium magnet (1) is sealed with a resin glue (5) to prevent damage and make the self-priming electromagnet (A) waterproof and fireproof. The passive end (D) is assembled by a convex suction ball (6) with a screw hole and a hanging ring (7) with screws, and is used to be passively attracted or separated by the self-priming electromagnet (A). The portable magnetic separator does not need to use electric energy when connected and used, and uses the physical properties of the self-priming electromagnet to attract and connect the passive end (D) of the iron body. When the self-priming electromagnet (A) is energized, the pole surface of the iron core (2) is in a non-magnetic state, and the passive end (D) of the iron body is not attracted and separated.

2. The portable magnetic splitter / combiner according to claim 1, characterized in that: The portable magnetic splitter / combiner uses a voltage value of 7.4V of two lithium batteries (9) connected in series, which is increased to 12V by a boost module (11), and a current value of 0.884A.

3. The portable magnetic splitter / combiner according to claim 1, characterized in that: The specifications and dimensions of the self-priming electromagnet (A) are as follows: outer diameter 33.8 mm, inner diameter 29.4 mm, magnetic pot (4) wall thickness 2.2 mm, bottom thickness 4 mm, total height 29.83 mm, iron core (2) diameter 16.77 mm, iron core column length 15.49 mm, neodymium magnet (1) outer diameter 25 mm, inner hole diameter 7 mm, thickness 2 mm, weight 6.7 g, enameled copper wire used in coil (3) length 36.8 m, pole face of the iron core (2) and end face of the magnetic pot (4) of the self-priming electromagnet (A) uniform concave arc radius of 20 mm, the iron core (2) and magnetic pot (4) inside the self-priming electromagnet (A) are made of iron material.

4. The portable magnetic splitter / combiner according to claim 1, characterized in that: Specifications and dimensions of the handle (C) and its components: the handle housing (10) is 158 mm long, 28.6 mm in outer diameter, and 0.2 mm in wall thickness; the touch surface diameter of the touch switch (8) is 14 mm, the opening diameter is 12 mm, the upper limit of the current passing is 2 A, the lithium battery (9) is 18650 type, with a capacity of 3200 mAh and a rated voltage of 3.7 V; the boost module (11) is 33 mm long, 17 mm wide, and 4 mm thick, and can boost the voltage of 3 to 10 V input to a fixed value of 12 V output; the handle housing is made of an iron round tube.

5. The portable magnetic splitter / combiner according to claim 1, characterized in that: The traction wire (B) is composed of a traction rope (12) with a power supply wire (13) inserted inside, one end of which is inserted into the handle (C) to connect to the boost module, and the other end is fastened with a connecting threaded cap (14), and then the power supply wire (13) is connected to the outer guide wire of the self-priming electromagnet; the specifications and dimensions of the various components of the traction wire (B) are as follows: the traction rope (12) is 1.35m long and 25mm wide and is sewn with a double-layer nylon belt; the power supply wire (13) is 1.3m long and consists of two 0.2 square copper wires and a 0.3mm diameter plastic-coated steel wire, and the whole is wrapped with a high-temperature resistant Teflon outer skin; the connecting threaded cap (14) has an outer diameter of 20mm, an inner diameter of 14mm, a height of 20mm, and an inner thread depth of 1mm.

6. The portable magnetic splitter / combiner according to claim 1, characterized in that: The specifications and dimensions of the passive end (D) are as follows: the maximum circumference of the outer circle of the convex suction ball (6) is 117.3 mm, the outer arc radius is 20 mm, the cutting angle is 150°, the thickness of the convex suction ball (6) is 8 mm, the center inner screw hole depth is 5 mm, and the thread specification is M4; the outer circle diameter of the hanging ring (7) is 18.5 mm, the inner circle diameter is 11 mm, the hanging ring screw length is 5 mm, and the thread specification is M4; the passive end (D) is made of iron material.

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