Electromagnetic retarding system based on pneumatic conveying pipeline and application method

Abstract

The invention relates to an electromagnetic retarding system based on a pneumatic conveying pipeline and an application method. The system comprises the pneumatic conveying pipeline, an electromagnetic retarding container, an electromagnetic slow blowing steel pipe and an electromagnetic speed reduction assembly, and the electromagnetic retarding container comprises an inner container and a conductive shell arranged on the surface of the inner container in a sleeving mode; the inlet end of the electromagnetic slow blowing steel pipe communicates with the pneumatic conveying pipeline, the electromagnetic slow speed assembly comprises a pair of baffle rings and an electromagnetic speed reduction spiral set, the electromagnetic slow blowing steel pipe is sleeved with the baffle rings at intervals, and the electromagnetic speed reduction spiral set is wound between the baffle rings in the axial direction of the electromagnetic slow blowing steel pipe. The electromagnetic speed reduction spiral group is electrified to generate a first magnetic field for decelerating the electromagnetic speed reduction container, and the speed reduction effect of the first magnetic field is controlled by changing the current of the electromagnetic speed reduction spiral group or the number of electrified spiral lines; the speed reduction efficiency and the speed reduction force of the container can be independently designed according to the weight and the abrasion degree of the container, and different speed reduction effects are shown, so that the defects of an existing reverse airflow speed reduction technology are overcome.

Description

Technical Field

[0001] The present application belongs to the technical field of container-type pneumatic pipeline conveying deceleration equipment, and in particular relates to an electromagnetic deceleration system based on a pneumatic conveying pipeline and an application method. Background Art

[0002] Pneumatic conveying system, also known as air flow conveying system, is a device that uses air flow energy to blow objects in a closed pipeline to achieve the purpose of logistics transportation. It has the advantages of high conveying efficiency and low conveying cost. The container-type pneumatic pipeline transportation system is a type of pneumatic conveying system, which is used to transport some items that need to be isolated and protected, such as ore or coal mine samples. After the items are sealed in a container suitable for pneumatic pipeline transportation, the container is compressed or sucked in the pipeline by wind to achieve the purpose of transportation, and the wind force is adjusted to achieve the purpose of accelerating or decelerating the container.

[0003] In order to make the speed of the container approach zero when it reaches the outlet of the pipeline, it is necessary to reduce the conveying wind force on the container and / or apply wind force in the opposite direction of the conveying direction to the container in the pipeline before the container reaches the outlet. However, since the effect of wind force on the container in the transport pipeline is continuous, and it is difficult for the industry to control the size of wind force to reach a level that can reduce the speed of the container at the outlet of the pipeline to zero, if the "back-blowing" force is too large or the time node of the reverse wind force is too early, it is easy to cause the container to fail to reach the outlet of the pipeline; if the "back-blowing" force is insufficient or the time node of the reverse wind force is too late, it is easy to cause the container to still have a large kinetic energy at the outlet. Designers can only determine the appropriate air pressure and the time to provide directional slow blowing to the container through a large number of experiments to prevent the container from rushing out of the pipeline and causing damage. However, adding directional slow blowing at the outlet of the pipeline is not only difficult to finely control the deceleration of the container, but also as the container wears, the reverse slow blowing method will gradually reduce the deceleration effect of the container. Summary of the invention

[0004] Based on the above-mentioned background technical needs, the present application provides an electromagnetic deceleration system based on a pneumatic conveying pipeline, which is used to cooperate with the pneumatic transportation process to implement reverse slow blowing of wind through the device to achieve the purpose of decelerating the transported containers, thereby avoiding the problem that when the container is severely worn, it is difficult to ensure the deceleration effect of the container by only relying on reverse slow blowing.

[0005] In order to achieve the above purpose, the technical solution of this application is:

[0006] An electromagnetic retarding system based on a pneumatic conveying pipeline comprises a pneumatic conveying pipeline, an electromagnetic retarding container, an electromagnetic slow-blowing steel pipe and an electromagnetic deceleration component, wherein the electromagnetic retarding container comprises an inner liner and a conductive shell sleeved on the surface of the inner liner; the inlet end of the electromagnetic slow-blowing steel pipe is connected to the pneumatic conveying pipeline, and the electromagnetic retarding component comprises a pair of baffle rings and an electromagnetic deceleration spiral group, wherein the pair of baffle rings are sleeved on the outside of the electromagnetic slow-blowing steel pipe at intervals, and the electromagnetic deceleration spiral group is wound between the pair of baffle rings along the axial direction of the electromagnetic slow-blowing steel pipe, and the electromagnetic deceleration spiral group is energized to generate a first magnetic field for decelerating the electromagnetic retarding container

[0007] Preferably, the electromagnetic deceleration spiral group includes a primary coil, several secondary coils and several tertiary coils, the radii of the primary coil, the secondary coil and the tertiary coil are not equal, and the primary coil, the secondary coil and the tertiary coil are respectively wound around the surface of the electromagnetic slow-blowing steel pipe in the order of radius from small to large along the radial direction of the electromagnetic slow-blowing steel pipe.

[0008] Preferably, the inner liner is an aluminum alloy inner liner, and the conductive shell is a copper shell.

[0009] Preferably, a polymer wear-resistant ring is sleeved on the surface of the conductive shell.

[0010] Preferably, the electromagnetic retarding system also includes a retarding receiving assembly, which is located at the outlet end of the electromagnetic slow-blowing steel pipe away from the pneumatic conveying pipeline, and includes a receiving base and a magnet, and the magnet is arranged on the receiving base; the conductive shell includes a copper tube sleeve arranged on the side of the inner tank and a copper bottom plate arranged on the bottom of the inner tank.

[0011] Preferably, the deceleration receiving assembly further comprises a buffer plate, which covers a surface of the side of the magnet opposite to the outlet end of the electromagnetic slow-blowing steel pipe, and a buffer gap is arranged between the buffer plate and the magnet.

[0012] Preferably, the electromagnetic retarding system also includes a magnetic field constraint component, which includes at least one pair of magnetic field compensation coils and a pair of mounting rings, wherein the pair of mounting rings are respectively arranged on the side of the retaining ring away from the electromagnetic deceleration spiral group, and the pair of magnetic field compensation coils are respectively arranged around the electromagnetic slow-blowing steel pipe on the side of the mounting ring away from the retaining ring, and the magnetic field compensation coils are energized to generate a second magnetic field, and the second magnetic field is used to constrain the first magnetic field.

[0013] Preferably, the magnetic field confinement assembly also includes a magnetic blocking cover, and a pair of magnetic blocking cover flanges are provided on the surface of the electromagnetic slow-blowing steel pipe, the pair of magnetic blocking cover flanges are respectively located at one end of the magnetic field compensation coil away from the electromagnetic deceleration spiral group, and the magnetic blocking cover is connected to the magnetic blocking cover flanges.

[0014] A method for applying an electromagnetic retarding system based on a pneumatic conveying pipeline, wherein the electromagnetic retarding system based on a pneumatic conveying pipeline is used to decelerate an object conveyed by the pneumatic conveying pipeline, and specifically comprises the following steps:

[0015] S1. The object to be transported is placed in the electromagnetic retarder container, and the electromagnetic retarder container is pneumatically transported using the pneumatic conveying pipeline;

[0016] S2. Get the instantaneous speed V1 of the electromagnetic slow-speed container reaching the first position of the electromagnetic slow-blowing steel pipe;

[0017] S3. Based on the first standard instantaneous speed V m Compared with V1, if V1 ≥ V m , then the electromagnetic deceleration spiral group is controlled to be energized, wherein the first standard instantaneous speed V m represents the minimum instantaneous speed reached by the electromagnetic retarder container before being decelerated by the electromagnetic deceleration spiral group, which can damage the transported object;

[0018] S4. Obtaining the energized level N of the electromagnetic deceleration spiral group and the energized current I of the electromagnetic deceleration spiral group, wherein the energized level N represents the number of coils energized simultaneously in the electromagnetic deceleration spiral group, and the energized current I represents the current flowing through the energized coil;

[0019] S5. Based on the energization level N and the energization current I, the electromagnetic deceleration spiral group is energized, so that the instantaneous speed V2 of the electromagnetic slow-speed container reaching the second position of the electromagnetic slow-blowing steel pipe is less than the second standard instantaneous speed V n , wherein the second standard instantaneous speed V n It represents the minimum instantaneous speed reached by the electromagnetic retarder container after being decelerated by the electromagnetic deceleration spiral group, which can damage the transported object.

[0020] By adopting the above technical solution, compared with the prior art, the present application has at least the following beneficial effects:

[0021] 1. Since the electromagnetic deceleration component is arranged on the surface of the electromagnetic slow-blowing steel pipe, the phenomenon of Lenz's law can be used to decelerate the electromagnetic deceleration container passing through the electromagnetic slow-blowing steel pipe. Compared with the method of decelerating by only reverse airflow in the prior art, the deceleration efficiency of the present application is higher and the unloading process is more stable;

[0022] Second, even if the above-mentioned reverse airflow is not easy to control the deceleration effect of the container, since the deceleration effect of the first magnetic field can be controlled by changing the current size of the electromagnetic deceleration spiral group or the number of energized spirals, the deceleration efficiency and deceleration force of the container can be independently designed according to the weight and degree of wear of the container and show different deceleration effects, so as to make up for the shortcomings of the existing reverse airflow deceleration technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of the electromagnetic retarding system in the embodiment.

[0024] Figure 2 It is an AA cross-sectional view of the electromagnetic retarding system in the embodiment.

[0025] Figure 3 A is a partial enlarged view of the electromagnetic retarding system in the embodiment.

[0026] Figure 4 It is the structural enlarged diagram B of the slow-speed receiving component in the embodiment.

[0027] Figure 5 It is the structural enlarged diagram C of the electromagnetic retarder in the embodiment.

[0028] Figure 6 It is a schematic diagram of the partial structure of the deceleration effect test device of the electromagnetic retarding system in the experimental example.

[0029] Figure 7 It is a partial cross-sectional view BB of the deceleration effect test device of the electromagnetic retarding system in the experimental example.

[0030] In the figure: pneumatic conveying pipeline 10, electromagnetic retarder container 20 (hereinafter referred to as "container 20"), liner 21, conductive shell 22, copper tube sleeve 221, connecting ring 2211, container cover 222, polymer wear-resistant ring 223, copper bottom plate 224, electromagnetic slow-blowing steel pipe 30, electromagnetic deceleration assembly 40, retaining ring 41, electromagnetic deceleration spiral group 42, magnetic field constraint assembly 50, mounting ring 51, magnetic field compensation coil 52, magnetic field compensation auxiliary coil 53, magnetic resistance cover 54, magnetic resistance cover flange 55, deceleration receiving assembly 60, receiving base 61, magnet 62, buffer plate 63, buffer gap 631, electromagnetic retarder system deceleration effect test device 70, electromagnetic retarder system simulation mechanism 71, experimental steel pipe 711, primary energized spiral 712, secondary energized spiral 713, tertiary energized spiral 714, fixing frame 72, experimental electronic scale 73. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The technical solution of the present application will be further described below in conjunction with the drawings of the embodiments of the present application, and the present application is not limited to the following specific implementation methods.

[0032] It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present application, it should be understood that if there are terms such as "upper", "lower", "inner", "outer", "left", "right", "front", "rear", "top", "bottom" and the like indicating directions or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the structure or component referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on the present patent, and for those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0033] The following is combined with Figure 1 To Attachment Figure 7 And specific embodiments further describe the present application in detail.

[0034] In the present application, an electromagnetic deceleration system based on a pneumatic conveying pipeline 10 is disclosed. The system is used to cooperate with the pneumatic conveying system in the prior art to achieve the purpose of decelerating the pneumatic conveying pipeline 10 during the unloading process. The electromagnetic retarder system includes a pneumatic conveying pipeline 10, an electromagnetic retarder container 20 (hereinafter referred to as "container 20"), an electromagnetic slow-blowing steel pipe 30 and an electromagnetic deceleration assembly 40, wherein the container 20 includes an inner liner 21 and a conductive shell 22 detachably arranged outside the inner liner 21, the inner liner 21 has a space for storing the transported object, and the conductive shell 22 is covered on the outside of the inner liner 21 to form a closed-loop structure to protect the inner liner 21; one end of the electromagnetic slow-blowing steel pipe 30 is sealed and connected to the end of the pneumatic conveying pipeline 10 through a flange to serve as an extension of the outlet end of the pneumatic conveying pipeline 10, and is used to unload the container 20 transported by the pneumatic conveying pipeline 10; the electromagnetic retarder assembly includes a pair of baffle rings 41 and an electromagnetic deceleration spiral group 42, the pair of baffle rings 41 are spaced apart on the outside of the electromagnetic slow-blowing steel pipe 30, and the above-mentioned electromagnetic deceleration spiral group 42 is wound between the pair of baffle rings 41 along the axial direction of the electromagnetic slow-blowing steel pipe 30.

[0035] Specifically, in one embodiment, the electromagnetic deceleration spiral group 42 is a plurality of copper wire coils wound along a fixed rotation direction and arranged in the middle section of the electromagnetic slow-blowing steel tube 30. Both ends of the copper wire are electrically connected to a power source. After the power source is energized to each copper wire coil, the electromagnetic deceleration spiral group 42 can be used as a solenoid with a plurality of energized spirals, and the electromagnetic slow-blowing steel tube 30 can be used as the magnetic core of the energized solenoid, and electromagnetic induction occurs, so that a uniform magnetic field is formed and covered in the electromagnetic slow-blowing steel tube 30, and the magnetic field serves as the first magnetic field, i.e., the deceleration magnetic field. In the container 20, at least its conductive shell 22 is made of a conductive metal with good electrical conductivity and poor magnetic conductivity. The shell is made of materials such as copper, silver, aluminum, and gold. When the shell made of the above materials reaches the upper end of the first magnetic field, an induced current will be generated due to the instantaneous change of the magnetic flux. The magnetic field of the induced current will hinder the change of the magnetic flux of the first magnetic field, causing the shell to decelerate instantly. In the process of the container 20 passing through the first magnetic field, due to the continuous electromagnetic damping force, its speed gradually decreases. By controlling the current passing through the electromagnetic deceleration spiral group 42 or controlling the length, number of turns and other parameters of the electromagnetic deceleration spiral group 42, the range of the first magnetic field, the magnetic induction intensity and the magnetic flux size can be controlled to achieve the purpose of controlling the speed of the container 20.

[0036] It should be noted that after the outlet end of the above-mentioned pneumatic conveying pipeline 10 is connected with the electromagnetic slow-blowing steel pipe 30 along the gravity direction, the container 20 can be blown by the wind in the pneumatic conveying pipeline 10 and enter the electromagnetic slow-blowing steel pipe 30 at a certain speed. In the process of the container 20 passing through the electromagnetic slow-blowing steel pipe 30, the wind used to blow the container 20 stops, and the wind used to reversely slow-blowing the container 20 starts, that is, the container 20 can be decelerated to a certain extent in the electromagnetic slow-blowing steel pipe 30 by the "reverse blowing wind force" used for "deceleration" in the pneumatic conveying system. Even if the deceleration effect of the "reverse blowing wind force" is not convenient for fine control, in this embodiment, on the basis of the deceleration effect, combined with the deceleration effect of the above-mentioned electromagnetic deceleration component 40, the deceleration efficiency and effect of the container 20 are improved. In this application, since the equipment for achieving the deceleration effect by "reverse blowing wind force" is not the focus of this case and is a prior art in the pneumatic conveying system, it is omitted in the accompanying drawings and will not be repeated hereafter.

[0037] The use of the electromagnetic retarding system has at least the following beneficial effects:

[0038] 1. Since the electromagnetic deceleration assembly 40 is arranged on the surface of the electromagnetic slow-blowing steel pipe 30, the phenomenon of Lenz's law can be used to decelerate the container 20 passing through the electromagnetic slow-blowing steel pipe 30. Compared with the method of decelerating by only reverse airflow in the prior art, the deceleration efficiency of the present application is higher and the unloading process is more stable;

[0039] Second, even if the reverse airflow is not easy to control the deceleration effect of the container 20, since the deceleration effect of the first magnetic field can be controlled by changing the current size of the electromagnetic deceleration spiral group 42 or the number of energized spirals, the deceleration efficiency and deceleration force of the container 20 can be independently designed according to the weight and degree of wear of the container 20 and different deceleration effects can be exhibited to make up for the shortcomings of the existing reverse airflow deceleration technology.

[0040] In addition, this application also provides some more specific implementation methods to improve the above-mentioned electromagnetic retarding system.

[0041] Furthermore, in a preferred embodiment, the number of the above-mentioned electromagnetic deceleration spiral group 42 is a plurality of coils for energizing, and these coils include a primary coil, a plurality of secondary coils and a plurality of tertiary coils. The radii of the primary coil, the secondary coil and the tertiary coil gradually increase, and they are respectively wound in sequence along the radial direction of the electromagnetic slow-blowing steel pipe 30 in order from small to large radius. The surface of the electromagnetic slow-blowing steel pipe 30 is arranged in sequence.

[0042] In a specific embodiment, in order to enable the above-mentioned several electromagnetic deceleration spiral groups 42 to generate a first magnetic field that matches the speed, weight or degree of wear of the container 20 to achieve a suitable deceleration effect, the above-mentioned primary coil is a long coil and has the smallest radius compared to other coils, and is wound on the innermost side of the several coil groups; there are two secondary coils, each of which is half the length of the primary coil and has a radius slightly larger than the primary coil. The two secondary coils are axially segmented and wound on the outside of the primary coil along the electromagnetic slow-blowing steel pipe 30; the number of tertiary coils is four, each of which is one-quarter the length of the above-mentioned primary coil and has a radius slightly larger than the secondary coil. The four tertiary coils are axially segmented and wound on the outside of the secondary coil along the electromagnetic slow-blowing steel pipe 30.

[0043] When using the above-mentioned electromagnetic deceleration system, since the container 20 may be worn due to contact with the inner wall of the pneumatic conveying pipe during transportation, as the degree of wear gradually increases, the weight and aerodynamic shape of the container 20 undergo uncontrollable changes, resulting in the container 20 reaching the above-mentioned deceleration magnetic field at different speeds when the pneumatic conveying pipe 10 is blown with a fixed "wind force". Affected by the power supply power of the power supply, when the above-mentioned electromagnetic deceleration spiral group 42 is inconvenient to adjust the magnetic field strength by adjusting the current size to decelerate the container 20 at different speeds, the purpose of strengthening or weakening the magnetic field can be achieved by increasing or reducing the number and level of energized coils, and thereby decelerating the container 20 at different speeds. As for the corresponding relationship between the speed of the container 20 and the number of energized coils in the electromagnetic deceleration spiral group 42, the following content of this application will be experimentally matched with specific experimental examples so that the implementation method can be implemented under relative conditions.

[0044] Furthermore, in order to relatively reduce the weight of the above-mentioned container 20, the above-mentioned inner liner 21 adopts an aluminum alloy inner liner 21. Due to its low density, aluminum alloy can not only reduce the weight, but also aluminum alloy is a conductive metal material with good electrical conductivity and poor magnetic conductivity. It can have a deceleration effect when passing through the deceleration magnetic field, and the aluminum alloy inner liner 21 has good corrosion resistance and is suitable for direct contact with the belt transporting the sample; considering that the container 20 uses the high conductivity and low magnetic permeability of the material to decelerate, under the premise of limited economic conditions, its conductive shell 22 is made of copper material, which can have a deceleration effect when passing through the deceleration magnetic field.

[0045] Furthermore, in order to improve the wear resistance of the above-mentioned container 20 in the pneumatic conveying pipeline 10 and extend its service life, a polymer wear-resistant ring 223 is provided on the surface of the above-mentioned conductive shell 22. Specifically, the polymer wear-resistant ring 223 is an annular structure made of polymer materials such as polyethylene and polyurethane, which is circumferentially nested to the surface of the above-mentioned copper tube sleeve 221 and / or the container cover 222, respectively, to protect the conductive shell 22 from collision and wear during transportation, thereby extending the service life of the container 20, and the polymer material does not affect the damping effect of the deceleration magnetic field on the conductive copper shell.

[0046] Furthermore, in one embodiment, since the electromagnetic slow-blowing steel pipe 30 is arranged along the direction of gravity, when the electromagnetic deceleration component 40 is energized to form a deceleration magnetic field to decelerate the container 20, the container 20 will output the electromagnetic slow-blowing steel pipe 30 at a lower speed. In order to further reduce the impact of the container 20 during the falling process and achieve the purpose of stable material connection, the electromagnetic deceleration system also includes a deceleration receiving component 60, which is arranged at the lower end of the electromagnetic slow-blowing steel pipe 30. The deceleration receiving component 60 includes a receiving base 61 and a magnet 62 arranged on the receiving base 61; the conductive shell 22 includes a copper tube sleeve 221 sleeved on the side of the inner liner 21 and a copper bottom plate 224 arranged at the bottom of the inner liner 21.

[0047] In a specific embodiment, the conductive shell 22 includes a copper tube sleeve 221 and a container cover 222. The copper tube sleeve 221 is sleeved on the outside of the aluminum alloy inner liner 21, and a connecting ring 2211 is provided at the upper end port of the copper tube sleeve 221. The connecting ring 2211 enables the container cover 222 to be sealed on the copper tube sleeve 221 through structures such as snaps or connecting threads, and forms a sealed shell with the copper tube sleeve 221 on the side of the aluminum alloy inner liner 21. The container cover 222 can be opened to put the transport sample into the aluminum alloy inner liner 21.

[0048] Specifically, the magnet 62 is preferably an annular permanent magnet (permanent magnets are generally neodymium magnets). There is a certain gap between the magnet 62 on the receiving base 61 and the electromagnetic slow-blowing steel pipe 30, and the gap is used to slow down the container 20 and facilitate the removal of the container 20. The deceleration principle of the slow-speed receiving component 60 on the container 20 is similar to the principle that the electromagnetic deceleration spiral group 42 forms a first magnetic field to decelerate the copper tube sleeve 221 on the side of the aluminum alloy inner liner 21, that is, the magnetic field is also generated by the magnet 62, so that the container 20 approaching and entering the magnetic field is cut by the copper bottom plate 224 located at the bottom of the aluminum alloy inner liner 21. The induced electromotive force in the conductive shell 22 changes, and the deceleration effect is produced under the influence of the Lenz force; the above-mentioned magnet 62 can also be an electromagnet 62 formed by an energized solenoid, that is, it can generate a uniform magnetic field in the above-mentioned gap for unloading to slow down the container 20 and then slowly fall. In addition to the above effects, the deceleration of the above-mentioned different stages or positions is implemented respectively by the copper tube sleeve 221 and the copper bottom plate 224 with different division of labor, instead of using a copper shell wrapped around the aluminum alloy inner liner 21 without dead angles, so as to ensure the deceleration effect while reducing the overall mass of the container 20.

[0049] Furthermore, in order to alleviate the impact of gravity on the magnet 62 during the falling process of the container 20, the above-mentioned deceleration receiving assembly 60 also includes a buffer plate 63, which covers the side surface of the magnet 62 opposite to the end of the electromagnetic slow-blowing steel pipe 30, that is, the upper surface of the magnet 62, and a buffer gap 631 is arranged between the buffer plate 63 and the magnet 62.

[0050] In a specific embodiment, the buffer plate 63 is made of a thick plate that can be elastically deformed, such as a rubber plate or a plastic plate, and can alleviate the impact of the container 20 through elastic deformation. In order to simultaneously realize the function of protecting the magnet 62, a mounting groove is downwardly arranged on the upper surface of the receiving base 61, and the magnet 62 is arranged in the mounting groove. The buffer plate 63 covers the top of the mounting groove and forms a buffer gap 631 between the magnet 62. During the unloading process, the magnet 62 decelerates the container 20, and the buffer plate 63 receives the container 20 and eliminates the impact of the container 20 through up and down deformation, so that the container 20 stops moving. The buffer plate 63 is deformed within the buffer gap 631 to avoid direct contact with the magnet 62, thereby protecting the magnet 62, extending its service life, and ensuring the stability of the magnetic field.

[0051] Furthermore, in certain implementation environments, in order to reduce the impact of magnetic field leakage of the electromagnetic deceleration assembly 40 on surrounding electronic equipment, the electromagnetic deceleration system also includes a magnetic field constraint assembly 50, and the magnetic field constraint assembly 50 includes at least one pair of magnetic field compensation coils 52 and a pair of mounting rings 51. The pair of mounting rings 51 are respectively fixed on the side of the retaining ring 41 away from the electromagnetic deceleration coil, and the pair of magnetic field compensation coils 52 are respectively fixed around the electromagnetic slow-blowing steel pipe 30 on the side of the mounting ring 51 away from the retaining ring 41.

[0052] Specifically, both ends of the magnetic field compensation coil 52 are also electrically connected to a power source. When the magnetic field compensation coil 52 is energized, a second magnetic field is generated. The second magnetic field is distributed at both ends of the electromagnetic deceleration spiral group 42, and has the effect of squeezing and absorbing the magnetic flux lines of the deceleration magnetic field. In one embodiment, the magnetic field compensation coil 52 is composed of a plurality of sub-coils arranged in a ring around the electromagnetic slow-blowing steel pipe 30 to form a suitable array. Some of the sub-coils have the same magnetic pole sequence as the deceleration magnetic field, while others have the opposite sequence. The oppositely energized electronic coils play the role of squeezing and constraining the magnetic field, while the same energized electronic coils play the role of absorbing the magnetic flux lines of the magnetic field, so that the range of the deceleration magnetic field is constrained as much as possible to the inside of the electromagnetic slow-blowing steel pipe 30 and between the two second magnetic fields used to offset the first magnetic field. The magnetic field outside the deceleration magnetic field is either squeezed into the constrained range by the offset magnetic field, or absorbed into the magnetic field compensation coil 52, so that the range of the deceleration magnetic field is controlled to avoid the deceleration magnetic field from affecting the surrounding electronic equipment.

[0053] In order to perform the same correction and constraint on the magnetic field of the magnetic field compensation coil 52, a magnetic field compensation auxiliary coil 53 is also arranged around the above-mentioned mounting ring 51. After the magnetic field compensation auxiliary coil 53 is energized, the magnetic field range of the magnetic field compensation coil 52 is constrained and corrected, thereby further reducing the influence of the magnetic field on the surrounding area.

[0054] Furthermore, the above-mentioned magnetic field confinement assembly 50 also includes a magnetic blocking cover 54, and a pair of magnetic blocking cover flanges 55 are arranged on the surface of the electromagnetic slow-blowing steel pipe 30. The pair of magnetic blocking cover flanges 55 are respectively located on the side of the magnetic field compensation coil 52 away from the electromagnetic deceleration spiral group 42, and the magnetic blocking cover flanges 55 are connected to the magnetic blocking cover 54.

[0055] Specifically, the above-mentioned magnetic blocking cover 54 is generally made of a semi-closed tube or box made of materials such as manganese-zinc ferrite, cobalt-based alloy, polymer with added magnetic particles, activated carbon fiber, etc. that can block the magnetic field or shield the magnetic field (the economy, weight, mechanical properties, etc. of the material should be considered when selecting), and it is fixed on the surface of the electromagnetic slow-blowing steel pipe 30 through the magnetic blocking cover flange 55, and the above-mentioned electromagnetic deceleration spiral group 42, magnetic field compensation coil 52, and magnetic field compensation auxiliary coil 53 are enclosed in the shielding space formed by the magnetic blocking cover 54 to prevent the residual magnetic field from leaking.

[0056] When using the above-mentioned electromagnetic deceleration system, with the mutual cooperation of the magnetic resistance cover 54, the magnetic field compensation coil 52, and the magnetic field compensation auxiliary coil 53, the range of the deceleration magnetic field can be concentrated as much as possible to a section of the electromagnetic slow-blowing steel pipe 30 used to decelerate the container 20, while blocking the leakage of the magnetic field, it also protects the above-mentioned electromagnetic deceleration spiral group 42.

[0057] The present application also discloses an application method of an electromagnetic retarding system based on a pneumatic conveying pipeline 10, the method comprising applying the electromagnetic retarding system to decelerate an object conveyed by the pneumatic conveying pipeline 10, the method specifically comprising the following steps:

[0058] In the first step, the object to be transported is placed in the container 20, and the container 20 is transported by introducing transport wind into the pneumatic transport pipe 10;

[0059] The second step is to set a photoelectric speed sensor at the first position of the electromagnetic slow-blowing steel pipe 30, which is close to the upper end of the electromagnetic deceleration spiral group 42, and detect the instantaneous speed V1 of the container 20 when it reaches the first position through the photoelectric speed sensor;

[0060] The third step is to compare the obtained V1 of the container 20 with the first standard instantaneous speed V m Compare and if it is determined that V1≥V m , then the electromagnetic deceleration spiral group 42 is energized, wherein the first standard instantaneous speed V m represents the minimum instantaneous speed reached by the container 20 before being decelerated by the electromagnetic deceleration spiral group 42, which can damage the transported object;

[0061] Step 4: based on the speed V1, obtain the energized level N of the electromagnetic deceleration spiral group 42 and / or the energized current I of the electromagnetic deceleration spiral group 42, wherein the energized level N represents the number of coils energized simultaneously in the electromagnetic deceleration spiral group, and the energized current I represents the current flowing through the energized coil;

[0062] The fifth step is to energize the electromagnetic deceleration spiral group 42 based on the above-mentioned energization level N and / or energization current I, and set another photoelectric speed sensor at the second position of the electromagnetic slow-blowing steel pipe 30, the second position is close to the lower end of the electromagnetic deceleration spiral group 42, and the instantaneous speed of the container 20 reaching the second position detected by the photoelectric speed sensor is V2. Under the action of the above-mentioned energized electromagnetic deceleration spiral group 42, the speed V2 should be less than the second standard instantaneous speed V n , wherein the second standard instantaneous speed V n It represents the minimum instantaneous speed reached by the container 20 after being decelerated by the electromagnetic deceleration spiral group 42, which can damage the transported object.

[0063] It should be noted that, in the process of the container 20 passing through the deceleration magnetic field formed by the above-mentioned electromagnetic deceleration spiral group 42, not only the deceleration magnetic field has a continuous deceleration effect on the container 20, but also the "backblowing" wind force in the prior art has a continuous deceleration effect on the container 20, and the "backblowing" deceleration effect is from a certain position before the container 20 reaches the electromagnetic deceleration spiral group 42 to the moment when the electromagnetic slow-blowing container 20 is output from the electromagnetic slow-blowing steel pipe 30. However, due to the low control accuracy and sensitivity of the "backblowing" wind force, under the premise that the "backblowing" wind force reduces most of the speed, the above-mentioned deceleration magnetic field is used to assist in deceleration. Under the ideal effect, the container 20 can be slowly output from the electromagnetic slow-blowing steel pipe 30 at a speed close to 0.

[0064] In order to implement the above method, the present application also discloses an electromagnetic retarding system deceleration effect test device 70, which is used to test the influence of the power-on level N and the power-on current I on the deceleration effect of the container 20. The device includes an electromagnetic retarding system simulation mechanism 71, a fixing frame 72 and an experimental electronic scale 73 for simulating the above electromagnetic retarding system, wherein the electromagnetic retarding simulation mechanism includes an experimental steel pipe 711, a fixing frame 72 and an experimental electronic scale 73, the fixing frame 72 is used to fix the above experimental steel pipe 711 in the height direction, the outer side of the fixed steel pipe is wound with a primary energized spiral 712 along its circumference, the outer side of the primary energized spiral 712 is wound with a secondary energized spiral 713, the outer side of the secondary energized spiral 713 is wound with a tertiary energized spiral 714, and the above The power source electrically connected to each level of the energized spiral is capable of stably providing currents of 10A, 20A, 40A, and 60A, so as to simulate the experiment of regulating the deceleration magnetic field by adjusting the number and current of the energized spirals; an experimental electronic scale 73 is placed at the lower end of the experimental steel tube 711, and the experimental electronic scale 73 is used to receive the container 20 while being able to display the force exerted by the container 20 on the experimental electronic scale 73 at the moment of contact with the experimental electronic scale 73; there is a gap of a fixed height between the experimental electronic scale 73 and the experimental steel tube 711 for removing the container 20. In the test device, the number of turns of each level of energized spiral and the length of the formed solenoid are equal, and the height range of the covered experimental steel tube 711 is also equal. A first photoelectric speed sensor is arranged in the experimental steel tube 711 at a position close to the upper end of the energized spiral, and this position is the above-mentioned first position; a second photoelectric speed sensor is arranged in the experimental steel tube 711 at a position close to the lower end of the energized spiral, and this position is the second position. The height between the second position and the electronic scale is 0.3m, and the height between the first position and the second position is 1m; the first photoelectric speed sensor is electrically connected to the power supply through the controller, and the controller can execute the speed detected by the first photoelectric speed sensor to control the power supply to output different currents and energize different numbers of energized spirals.

[0065] It should be noted that when implementing the above method to decelerate the experimental object, in order to reduce the impact of the backblowing wind force on the experimental results, the shape of the experimental object contained in the inner liner 21 has no effect on the moving trajectory, moving speed and posture of the container 20 during transportation; after the experimental object is placed in the container 20, it can appear in an intact or damaged state under the impact effect of different speeds, so as to show the degree of protection of the deceleration effect of the deceleration magnetic field on the experimental object; in order to simplify the simulation process, the test device of the above method omits the "wind backblowing" device in the pneumatic conveying system, and only demonstrates the effect of the deceleration magnetic field of the above-mentioned electromagnetic deceleration system.

[0066] Under the above conditions, the container 20 is released at different heights and allowed to enter the test steel pipe 711 in the direction of free fall, thereby simulating a scenario in which the back-blowing wind force has limited deceleration effect and the container 20 enters the test steel pipe 711 at different speeds.

[0067] Specifically, obtain the first standard instantaneous speed V m and the second standard instantaneous speed V n The process is:

[0068] Experimental objects of equal weight are placed in the container 20 for several tests. The total weight of the container 20 after placing the experimental objects is 1 kg. In each experiment, the container 20 is placed at different heights from the first position of the above-mentioned experimental steel pipe 711 for free fall (so that the speed at which the container 20 reaches the first position is different), and the container 20 passes through the first position and the second position at different speeds and falls onto the experimental electronic scale 73 (assuming that the collision time between the container 20 and the experimental electronic scale 73 is 0.1 s). The states of the experimental objects in different tests and the instantaneous reading of the experimental electronic scale 73 are observed (the display reading of the experimental electronic scale 73 is adjusted to Newton, and the instantaneous degree when the container 20 contacts the experimental electronic scale 73 is recorded by a high-speed camera as a forward reading. The instantaneous reading is recorded).

[0069] The test results are shown in Table 1 (the unit change of the test height is 0.05m. Due to the length limitation of this article, the data with no obvious change in the state results of the experimental objects between the test heights are reasonably omitted in the table below):

[0070]

[0071] Table 1

[0072] From the data in the above table, it can be seen that when the test height is ≥ (the height of the container 20 from the first position of the test steel pipe 711) 0.7m, the state of the test object is shown as damaged, and the speed of the second position corresponding to the height is taken as V in the above simulation process. n , that is, V n =5.77(m / s); the velocity at the first position is V m, that is, V m =3.70(m / s).

[0073] The instantaneous reading of the experimental electronic scale 73 also reflects that when the speed of the container 20 reaching the second position exceeds the above V n When the container 20 and the experimental object are subjected to an impact force of no less than 92.1N, the force may exceed the maximum limit of the impact force that the experimental object can withstand, resulting in damage to the experimental object.

[0074] According to the above test phenomena and conclusions, combined with the force analysis, it can be known that under the conditions of the same falling height, the same current and the same number of energized coils (the number of energized spirals in the energized state), the greater the total mass of the container 20 (that is, the greater the mass of the experimental object placed in the same container 20), the shorter the time it takes for the container 20 to pass through the experimental steel pipe 711, and the greater the instantaneous reading of the experimental electronic scale 73. Therefore, as the weight of the object increases, a higher current and / or more energized coils can be selected to make the instantaneous reading of the electronic scale less than 92.1N to ensure that the experimental object is intact.

[0075] Furthermore, the process of obtaining the energized level N of the electromagnetic deceleration spiral group 42 and the energized current I of the electromagnetic deceleration spiral group 42 in the above step S4 is as follows:

[0076] A container 20 with a total weight of 1 kg (the weight is the total mass of the container 20 plus the experimental object) is freely dropped at a height of not less than 0.7 m from the first position of the experimental steel pipe 711 (simulating that the pneumatic transport pipeline 10 transports the container before the container 20 enters the electromagnetic slow-blowing steel pipe 30) and falls onto the experimental electronic scale 73 through the experimental steel pipe 711. By controlling the level and current of the energized spiral, the instantaneous speed of the container 20 reaching the second position is less than 5.77 m / s to ensure that the experimental object is in good condition. The test results are shown in Table 2:

[0077]

[0078]

[0079] Table 2

[0080] The above test data proves that, under the condition that the total weight of the container 20 is the same, when the instantaneous speed V1 of the container 20 when it reaches the first position is ≥3.700m / s, applying a current of 10, 20, 40 or 60A to the current 1, 2, 3 level energized coils respectively or simultaneously can have different deceleration effects on the container 20; for the container 20 with a total weight of 1kg, when the speed at which it reaches the first position is not less than 4.43m / s and only the level 1 energized coil is energized, the energized current must be not less than 40A to make the instantaneous speed V2 of the object less than 5.77m / s, so as to ensure that the object is not damaged by impact; and when the level 1 and level 2 coils are energized at the same time, the object can be guaranteed not to be damaged under the condition that the current is ≥10A. Therefore, in actual use, it is recommended to set the normal power-on current value of the above-mentioned electromagnetic retarding system to 10A, set the level of the normal power-on coil to level 1 and level 2, and energize level 1 and level 2 at the same time to ensure that the object is not damaged; use the third-level coil as a magnetic field strengthening coil to improve the retarding effect.

[0081] Combined with the above test results, it can be seen that the power-on level N and the power-on current I of the electromagnetic retarding system of the present application can be matched and adjusted based on the speed when the container 20 enters the electromagnetic slow-blowing steel pipe 30, so as to ensure that the container 20 can be decelerated within a controllable range and achieve the corresponding deceleration effect, thereby improving the unloading efficiency; with the cooperation of the back-blowing gas of the pneumatic conveying system, the present application can more accurately control the falling speed of the container 20 during the unloading process, avoiding the generation of high noise and damage to the container 20, objects and equipment in the container 20.

[0082] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation methods of the present application. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An electromagnetic retarding system based on a pneumatic conveying pipeline, comprising a pneumatic conveying pipeline, characterized in that: It also includes an electromagnetic retarder container, an electromagnetic slow-blowing steel pipe and an electromagnetic deceleration assembly, wherein the electromagnetic retarder container includes an inner liner and a conductive shell sleeved on the surface of the inner liner; the inlet end of the electromagnetic slow-blowing steel pipe is connected to the pneumatic conveying pipeline, and the electromagnetic retarder assembly includes a pair of baffle rings and an electromagnetic deceleration spiral group, wherein the pair of baffle rings are sleeved on the outside of the electromagnetic slow-blowing steel pipe at intervals, and the electromagnetic deceleration spiral group is wound between the pair of baffle rings along the axial direction of the electromagnetic slow-blowing steel pipe, and the electromagnetic deceleration spiral group is energized to generate a first magnetic field for decelerating the electromagnetic retarder container.

2. The electromagnetic retarding system based on pneumatic conveying pipeline according to claim 1 is characterized in that: The electromagnetic deceleration spiral group includes a primary coil, several secondary coils and several tertiary coils. The radii of the primary coil, secondary coil and tertiary coil are not equal, and the primary coil, secondary coil and tertiary coil are respectively wound on the surface of the electromagnetic slow-blowing steel pipe in the order of radius from small to large along the radial direction of the electromagnetic slow-blowing steel pipe.

3. The electromagnetic retarding system based on pneumatic conveying pipeline according to claim 1 is characterized in that: The inner shell is an aluminum alloy inner shell, and the conductive shell is a copper shell.

4. The electromagnetic retarding system based on pneumatic conveying pipeline according to claim 1 is characterized in that: A polymer wear-resistant ring is sleeved on the surface of the conductive shell.

5. The electromagnetic retarding system based on pneumatic conveying pipeline according to claim 1 is characterized in that: It also includes a slow-speed receiving component, which is located at the outlet end of the electromagnetic slow-blowing steel pipe away from the pneumatic conveying pipeline. The slow-speed receiving component includes a receiving base and a magnet, and the magnet is arranged on the receiving base; the conductive shell includes a copper tube sleeve arranged on the side of the inner tank and a copper bottom plate arranged on the bottom of the inner tank.

6. The electromagnetic retarding system based on pneumatic conveying pipeline according to claim 5 is characterized in that: The deceleration receiving assembly further comprises a buffer plate, which covers a surface of the magnet on one side opposite to the outlet end of the electromagnetic slow-blowing steel pipe, and a buffer gap is arranged between the buffer plate and the magnet.

7. The electromagnetic retarding system based on pneumatic conveying pipeline according to claim 1 is characterized in that: It also includes a magnetic field constraint component, which includes at least one pair of magnetic field compensation coils and a pair of mounting rings. The pair of mounting rings are respectively arranged on the side of the retaining ring away from the electromagnetic deceleration spiral group, and the pair of magnetic field compensation coils are respectively arranged around the electromagnetic slow-blowing steel pipe on the side of the mounting ring away from the retaining ring. The magnetic field compensation coils are energized to generate a second magnetic field, and the second magnetic field is used to constrain the first magnetic field.

8. The electromagnetic retarding system based on pneumatic conveying pipeline according to claim 7 is characterized in that: The magnetic field confinement assembly also includes a magnetic blocking cover. A pair of magnetic blocking cover flanges are provided on the surface of the electromagnetic slow-blowing steel pipe. The pair of magnetic blocking cover flanges are respectively located at one end of the magnetic field compensation coil away from the electromagnetic deceleration spiral group, and the magnetic blocking cover is connected to the magnetic blocking cover flanges.

9. An application method of an electromagnetic retarding system based on a pneumatic conveying pipeline, characterized in that: Using the electromagnetic deceleration system based on a pneumatic conveying pipeline as described in any one of claims 1 to 8 to decelerate an object conveyed by the pneumatic conveying pipeline specifically comprises the following steps: S1. placing an object in the electromagnetic retarder container, and using the pneumatic conveying pipeline to pneumatically transport the electromagnetic retarder container; S2. Get the instantaneous speed V1 of the electromagnetic slow-speed container reaching the first position of the electromagnetic slow-blowing steel pipe; S3. Based on the first standard instantaneous speed V m Compared with V1, if V1≥V m , then the electromagnetic deceleration spiral group is controlled to be energized, wherein the first standard instantaneous speed V m represents the minimum instantaneous speed reached by the electromagnetic retarder container before being decelerated by the electromagnetic deceleration spiral group, which can damage the transported object; S4. Obtaining the energized level N of the electromagnetic deceleration spiral group and the energized current I of the electromagnetic deceleration spiral group, wherein the energized level N represents the number of coils energized simultaneously in the electromagnetic deceleration spiral group, and the energized current I represents the current flowing through the energized coil; S5. Based on the energization level N and the energization current I, the electromagnetic deceleration spiral group is energized, so that the instantaneous speed V2 of the electromagnetic slow-speed container reaching the second position of the electromagnetic slow-blowing steel pipe is less than the second standard instantaneous speed V n , wherein the second standard instantaneous speed V n It represents the minimum instantaneous speed reached by the electromagnetic retarder container after being decelerated by the electromagnetic deceleration spiral group, which can damage the transported object.

Images