Plugging device

Abstract

The utility model belongs to the technical field of pipe orifice plugging, and particularly relates to a plugging device which comprises a main body and a permanent magnet, the main body comprises a non-magnetizer, a first magnetizer and a second magnetizer, and the first magnetizer and the second magnetizer are arranged in a spaced mode in the first direction and form a gap; the non-magnetizer is connected between the first magnetizer and the second magnetizer and located in the gap, a mounting hole is defined by the first magnetizer, the non-magnetizer and the second magnetizer, and the first direction is perpendicular to the axial direction of the mounting hole; the end faces, located on the same side, of the first magnetizer and the second magnetizer form an abutting face, and the abutting face is used for abutting against a step face in a pipe opening. The permanent magnet is rotationally mounted in the mounting hole, and the rotating axis of the permanent magnet coincides with the axis of the mounting hole; an S pole and an N pole are formed at the two ends, perpendicular to the axial direction of the mounting hole, of the permanent magnet correspondingly, and the risk that the plugging device is blown off can be reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pipe orifice plugging, and particularly relates to a plugging device. BACKGROUND

[0002] Nuclear power plants usually need to be regularly maintained, so that the operation of the nuclear power plant has good safety. During the maintenance of the nuclear power plant, the equipment is disassembled from the system, and the pipe orifice (for example, a flange, a nozzle, etc.) connected with the equipment is in an open state. In order to prevent foreign matters from entering the system, a plugging device is used to plug the pipe orifice.

[0003] The plugging device is made according to the inner wall step structure at the pipe orifice, and the plugging device is usually made of stainless steel. When in use, the plugging device is directly placed in the pipe orifice, and relies on the self-weight to abut against the step surface, so as to realize the plugging of the pipe orifice and meet the demand of preventing foreign matters from entering the system. However, in some cases, compressed air needs to be used to blow the system, and the plugging device only relies on the self-weight to bear the pressure. The compressed air used for blowing is easy to blow the plugging device out of the pipe orifice, and the blown plugging device is easy to hit the sealing interface of the system and other positions, which is easy to cause damage to the system and increase the maintenance cost of the system. Meanwhile, after the plugging device is blown off, there is still a hidden danger that foreign matters enter the system.

[0004] The above statements are only used to provide background technical information related to the application, and do not necessarily constitute the prior art. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a plugging device, and aims at solving the technical problem that the plugging device in the prior art is easy to be blown off.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of a plugging device for plugging a pipe orifice. The plugging device comprises a main body and a permanent magnet. The main body comprises a non-magnetic body, a first magnetic body and a second magnetic body. The first magnetic body and the second magnetic body are arranged at intervals along a first direction and form a gap. The non-magnetic body is connected between the first magnetic body and the second magnetic body and located in the gap. The first magnetic body, the non-magnetic body and the second magnetic body surround to form a mounting hole. The first direction is perpendicular to the axial direction of the mounting hole. The end faces of the first magnetic body and the second magnetic body located on the same side form an abutting surface for abutting against the step surface in the pipe orifice. The permanent magnet is rotatably installed in the mounting hole. The rotation axis of the permanent magnet coincides with the axis of the mounting hole. The two ends of the permanent magnet perpendicular to the axial direction of the mounting hole form S poles and N poles respectively.

[0007] Optionally, the first magnetic conductor comprises a first magnetic conducting part, the second magnetic conductor comprises a second magnetic conducting part, the non-magnetic conductor comprises a first non-magnetic conducting part and a second non-magnetic conducting part, the first magnetic conducting part, the first non-magnetic conducting part, the second magnetic conducting part and the second non-magnetic conducting part are sequentially connected in a head-to-tail manner along the circumference of the mounting hole and surround the mounting hole to form the mounting hole; the first magnetic conducting part and the second magnetic conducting part are symmetrically arranged, and the first non-magnetic conducting part and the second non-magnetic conducting part are symmetrically arranged.

[0008] Optionally, a surface of the first magnetic conducting part facing the mounting hole is a first circular arc cylindrical surface, a surface of the first non-magnetic conducting part facing the mounting hole is a second circular arc cylindrical surface, a radius of the first circular arc cylindrical surface is equal to a radius of the second circular arc cylindrical surface, and a central angle corresponding to the first circular arc cylindrical surface is greater than a central angle corresponding to the second circular arc cylindrical surface.

[0009] Optionally, an end surface of the S pole facing away from the N pole is a third circular arc cylindrical surface, the radius of the first circular arc cylindrical surface is equal to a radius of the third circular arc cylindrical surface, and a central angle corresponding to the third circular arc cylindrical surface is smaller than the central angle corresponding to the first circular arc cylindrical surface; an end surface of the N pole facing away from the S pole is a fourth circular arc cylindrical surface, the radius of the first circular arc cylindrical surface is equal to a radius of the fourth circular arc cylindrical surface, and a central angle corresponding to the fourth circular arc cylindrical surface is smaller than the central angle corresponding to the first circular arc cylindrical surface.

[0010] Optionally, the first magnetic conductor comprises a third magnetic conducting part, the second magnetic conductor comprises a fourth magnetic conducting part, and in the axial direction of the mounting hole, one end of the first magnetic conducting part is connected to the third magnetic conducting part, and one end of the second magnetic conducting part is connected to the fourth magnetic conducting part; the non-magnetic conductor comprises a third non-magnetic conducting part connected between the first non-magnetic conducting part and the second non-magnetic conducting part, and the third non-magnetic conducting part is connected between the third magnetic conducting part and the fourth magnetic conducting part; the third magnetic conducting part, the fourth magnetic conducting part and the third non-magnetic conducting part are used to close one end opening of the mounting hole, and a surface of the third magnetic conducting part facing away from the mounting hole, a surface of the fourth magnetic conducting part facing away from the mounting hole and a surface of the third non-magnetic conducting part facing away from the mounting hole form an abutting surface.

[0011] Optionally, the first magnetic conducting part comprises a first soft iron layer and a first protective layer connected in sequence, and the first soft iron layer is located between the first protective layer and the mounting hole; the second magnetic conducting part comprises a second soft iron layer and a second protective layer connected in sequence, and the second soft iron layer is located between the second protective layer and the mounting hole.

[0012] Optionally, at least one of the first soft iron layer and the second soft iron layer is an electrical soft iron layer; and / or at least one of the first protective layer and the second protective layer is a cast iron layer.

[0013] Optionally, a surface of the main body facing away from the mounting hole is provided with a flange structure, the flange structure is annularly arranged outside the main body, and the flange structure is located at an end of the main body away from the abutting surface.

[0014] Optionally, the non-magnetic conductor is a brass body.

[0015] Optionally, the sealing device also includes a cover and a rotating handle. The cover covers the opening of the mounting hole facing away from the contact surface. The rotating handle is rotatably mounted on the side of the cover facing away from the mounting hole. The rotating handle is connected to the permanent magnet and is used to drive the permanent magnet to rotate.

[0016] The sealing device provided by this utility model has at least one of the following technical effects: In use, the contact surface of the sealing device is brought into contact with the stepped surface of the pipe opening. Then, by rotating the permanent magnet, the S and N poles are aligned with the first and second magnetic conductors, respectively, generating a magnetic attraction that firmly attaches the sealing device to the pipe opening. When the sealing device needs to be removed, the permanent magnet is rotated, causing the S and N poles to shift away from the first and second magnetic conductors, eliminating the magnetic attraction and allowing the sealing device to be easily removed. During this process, the sealing device achieves magnetic attraction with the stepped surface of the pipe opening through the rotation of the permanent magnet, effectively reducing the risk of the sealing device being blown away and the risk of foreign objects entering the system through the pipe opening.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the sealing device provided in some embodiments of this application in one state.

[0020] Figure 2 for Figure 1 The diagram shows the structure of the sealing device.

[0021] Figure 3 For along Figure 2 Sectional view along line AA in the middle.

[0022] Figure 4 for Figure 2 The shown is a cross-sectional view of the sealing device in another state.

[0023] Figure 5 for Figure 1 An exploded view of the sealing device shown.

[0024] Figure 6 For Figure 1 The structure diagram of the occlusion device is shown.

[0025] In the drawings, various reference signs refer to:

[0026] 100, occlusion device; 10, main body; 11, first magnet conductor; 111, first magnet conducting part; 1111, first circular arc cylindrical surface; 1112, first soft iron layer; 1113, first protective layer; 1114, first protruding part; 112, third magnet conducting part; 12, second magnet conductor; 121, second magnet conducting part; 1211, second soft iron layer; 1212, second protective layer; 1213, second protruding part; 122, fourth magnet conducting part; 13, non-magnet conductor; 131, first non-magnet conducting part; 1311, second circular arc cylindrical surface; 1312, third protruding part; 132, second non-magnet conducting part; 1321, fourth protruding part; 133, third non-magnet conducting part; 14, mounting hole; 15, abutting surface; 16, flange structure; 17, gap; 20, permanent magnet; 21, S pole; 211, third circular arc cylindrical surface; 22, N pole; 221, fourth circular arc cylindrical surface; 30, cover body; 40, rotating handle; 50, rotating shaft.

[0027] The first direction Q

[0028] The axis M of the mounting hole DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0030] In the description of the embodiments of the present application, the terms “first” and “second” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first” and “second” can explicitly or implicitly include at least one of the features.

[0031] In the description of the present application, the meaning of “a plurality of” is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0032] In the present application, unless specifically defined otherwise, the terms "mount", "connect", "connection", "fixed", and the like, should be construed broadly and can be either fixed connections or detachable connections, or integral, or direct or indirect connections through intermediaries, or internal connections or interaction between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the present application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through intermediaries. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0034] In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "inner", "outer", "side", "upper", "bottom", "front", "rear" and the like is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0035] It should be further pointed out that the same reference numerals are used to represent the same components or the same parts in the embodiments of the present application. For the same parts in the embodiments of the present application, only one part or component may be labeled with a reference numeral in the drawings, and it should be understood that the reference numerals are also applicable to other identical parts or components.

[0036] Nuclear power plants usually need regular maintenance, so that the operation of the nuclear power plant has good safety. During the maintenance of the nuclear power plant, the equipment is disassembled from the system, and the pipe opening connected with the equipment is in an open state. In order to prevent foreign matter from entering the system, a plugging device is used to plug the pipe opening.

[0037] The plugging device is made according to the step structure in the pipe opening, and the plugging device is usually made of stainless steel. When in use, the plugging device is directly placed in the pipe opening, and the plugging device is abutted on the step surface by self-weight, so that the plugging of the pipe opening is realized, and the requirement of preventing foreign matters is met. For example, in the maintenance process of the main steam safety valve, the plugging device is used to plug the nozzle opening of the system matched with the main steam safety valve, the plugging device is made according to the size of the step structure in the nozzle opening, the plugging device is made of stainless steel, and the installation method is that the plugging device is directly placed in the nozzle opening, and the plugging device is seated on the step surface by self-weight, so that the requirement of preventing foreign matters is met.

[0038] During the overhaul, the secondary side of the steam generator in the main steam system needs to be implemented dry maintenance, and the mode is to use compressed air to blow. Since the pressure is large (for example, 1 bar.g can be reached), the above-mentioned plugging device cannot bear pressure only by self-weight, and the plugging device is blown out and falls on the sealing surface of the nozzle, which causes damage to the sealing surface, and causes the repair and maintenance cost of the sealing surface to increase sharply. The plugging device is blown out, and there is a risk that a large foreign matter enters the system.

[0039] The plugging device of the embodiment of the application uses magnetic attraction force to fix the plugging device at the pipe opening, increases the pressure bearing capacity of the plugging device, reduces the risk of the plugging device being blown out, and reduces the damage risk of the sealing surface and other parts of the system and the risk of foreign matter entering the system.

[0040] The plugging device 100 of the embodiment of the application will be described below with reference to the accompanying drawings. Figures 1 to 6

[0041] Figure 1 The structure schematic diagram of the plugging device 100 provided by some embodiments of the application in one state. Figure 2 The structure schematic diagram of the plugging device 100 provided by some embodiments of the application in one state. Figure 1 The structure schematic diagram of the plugging device 100 provided by some embodiments of the application in one state. Figure 3 The cross-sectional view along the A-A line. Figure 2 The cross-sectional view along the A-A line. Figure 4 The cross-sectional view along the A-A line. Figure 2 The cross-sectional view along the A-A line.

[0042] ​In some embodiments, the plugging device 100 is used for plugging a pipe opening, and the plugging device 100 comprises a main body 10 and a permanent magnet 20; the main body 10 comprises a non-magnetic body 13, a first magnetic body 11 and a second magnetic body 12, the first magnetic body 11 and the second magnetic body 12 are arranged at intervals along a first direction Q and form a gap 17, the non-magnetic body 13 is connected between the first magnetic body 11 and the second magnetic body 12 and located in the gap 17, the first magnetic body 11, the non-magnetic body 13 and the second magnetic body 12 form a mounting hole 14, and the first direction Q is perpendicular to the axial direction of the mounting hole 14; the end faces of the first magnetic body 11 and the second magnetic body 12 located on the same side form an abutting surface 15, and the abutting surface 15 is used for abutting against a stepped surface in the pipe opening; the permanent magnet 20 is rotatably installed in the mounting hole 14, and the rotation axis of the permanent magnet 20 coincides with the axis M of the mounting hole 14; the permanent magnet 20 forms an S pole 21 and an N pole 22 at two ends perpendicular to the axial direction of the mounting hole 14.

[0043] The pipe opening can refer to the position where the flange, nozzle and other components of the system and equipment are connected.

[0044] The main body 10 can refer to the body part of the plugging device 100, and the main body 10 can cooperate with the permanent magnet 20, so that the abutting surface 15 is magnetically attracted to the stepped surface at the pipe opening, thereby realizing the plugging of the pipe opening; the main body 10 can also cooperate with the permanent magnet 20, so that the magnetic force between the abutting surface 15 and the pipe opening disappears, thereby facilitating the removal of the plugging device 100 from the pipe opening, and facilitating the subsequent assembly of the equipment.

[0045] The main body 10 comprises the first magnetic body 11, the second magnetic body 12 and the non-magnetic body 13, the first magnetic body 11 and the second magnetic body 12 are arranged at intervals along the first direction Q, and the space between the first magnetic body 11 and the second magnetic body 12 forms the gap 17, that is, the first magnetic body 11 and the second magnetic body 12 do not contact, and the non-magnetic body 13 is located in the gap 17, which on the one hand serves to connect the first magnetic body 11 and the second magnetic body 12, and on the other hand also serves to magnetically separate. The first direction Q is the arrangement direction of the first magnetic body 11 and the second magnetic body 12.

[0046] The first magnetic body 11, the second magnetic body 12 and the non-magnetic body 13 form the mounting hole 14, and the axial direction of the mounting hole 14 is perpendicular to the first direction Q, that is, the first magnetic body 11 and the second magnetic body 12 are arranged along the radial direction of the mounting hole 14.

[0047] The end faces of the first magnetic body 11 and the second magnetic body 12 located on the same side form the abutting surface 15, the main body 10 can extend into the pipe opening, and the abutting surface 15 abuts against the stepped surface at the pipe opening.

[0048] For example, along the axial direction of the mounting hole 14, the end faces of the first magnetic body 11 and the second magnetic body 12 located on the same side jointly form the abutting surface 15.

[0049] For example, the end faces of the first magnetic conductor 11 and the second magnetic conductor 12 on the same side form an abutting surface 15 in the direction perpendicular to the axial direction of the mounting hole 14.

[0050] The first magnetic conductor 11 and the second magnetic conductor 12 refer to materials that can conduct and enhance magnetic fields. The first magnetic conductor 11 and the second magnetic conductor 12 have high magnetic permeability, which can effectively guide magnetic field lines and concentrate magnetic fields in a specific area. The materials of the first magnetic conductor 11 and the second magnetic conductor 12 include soft iron, silicon steel, and electrical pure iron.

[0051] The non-magnetic conductor 13 refers to materials that do not conduct magnetic fields or have very weak magnetic field conduction ability. The non-magnetic conductor 13 has low magnetic permeability, which can isolate and limit the diffusion of magnetic fields. The materials of the non-magnetic conductor 13 include brass, aluminum, and plastic.

[0052] The permanent magnet 20 refers to materials or objects that can maintain their magnetism for a long time without external magnetic field action. The permanent magnet 20 has a spontaneous magnetization intensity, which can generate a stable magnetic field and maintain magnetism after the external magnetic field disappears. Common materials of the permanent magnet 20 include ferrite, neodymium iron boron (NdFeB), aluminum nickel cobalt (AlNiCo), and samarium cobalt (SmCo).

[0053] The rotation axis of the permanent magnet 20 coincides with the axis M of the mounting hole 14. It can be understood that the rotation axis of the permanent magnet 20 coincides with or approaches the rotation axis of the mounting hole 14.

[0054] The rotation axis of the permanent magnet 20 coincides with the axis M of the mounting hole 14, so that the permanent magnet 20 is arranged horizontally in the mounting hole 14.

[0055] The permanent magnet 20 has S poles 21 and N poles 22 at both ends perpendicular to the axial direction of the mounting hole 14. For example, the two ends of the permanent magnet 20 distributed in the length direction are S poles 21 and N poles 22, respectively.

[0056] The S poles 21 and N poles 22 respectively refer to the two polarities of the magnetic field of the permanent magnet 20, representing the South Pole (S) and the North Pole (N). This is a basic concept in magnetism, which is used to describe the magnetic field distribution and characteristics of the magnet. The S pole 21 refers to the end where the magnetic field lines enter. The N pole 22 refers to the end where the magnetic field lines exit.

[0057] The rotation axis of the permanent magnet 20 coincides with the axis M of the mounting hole 14, the permanent magnet 20 forms S poles 21 and N poles 22 at two ends perpendicular to the axis M of the mounting hole 14, the S poles 21 and the N poles 22 are located on opposite sides of the axis M of the mounting hole 14, and the S poles 21 and the N poles 22 can rotate around the axis M of the mounting hole 14 when the permanent magnet 20 rotates, so as to be opposite or staggered with the first magnetic conductor 11 and the second magnetic conductor 12, respectively.

[0058] The plugging device 100 of the embodiment of the application is used, the abutting surface 15 of the plugging device 100 is abutted with the stepped surface of the pipe opening, then the S poles 21 and the N poles 22 are opposite to the first magnetic conductor 11 and the second magnetic conductor 12 by rotating the permanent magnet 20, so as to generate magnetic attraction force, and the plugging device 100 is firmly adsorbed on the pipe opening. When it is needed to disassemble the plugging device 100, the S poles 21 and the N poles 22 are staggered with the first magnetic conductor 11 and the second magnetic conductor 12 by rotating the permanent magnet 20, the magnetic attraction force disappears, and the plugging device 100 can be easily taken out. In this process, the plugging device 100 realizes magnetic attraction with the stepped surface of the pipe opening by rotating the permanent magnet 20, which can effectively reduce the risk of the plugging device 100 being blown away and the risk of foreign matters entering the system through the pipe opening.

[0059] The principle of the plugging device 100 of the embodiment of the application is simple, the application is convenient, and the cost is low. In addition to being applicable to the main steam safety valve in the example, the plugging device 100 can also be applied to plugging of vertical pipe openings with stepped surfaces in nuclear power plants. The size of the plugging device 100 can be modified according to the size of the pipe opening.

[0060] In some embodiments, the plugging device 100 uses the principle of magnetic force to increase the pressure bearing capacity of the plugging device 100. In addition to ensuring the basic anti-foreign matter requirement, the device can also be ensured not to be blown out under the condition of system pressure charging, eliminating the risk of equipment damage and the risk of foreign matters entering the system.

[0061] In some embodiments, the first magnetic conductor 11 includes a first magnetic conducting part 111, the second magnetic conductor 12 includes a second magnetic conducting part 121, the non-magnetic conductor 13 includes a first non-magnetic conducting part 131 and a second non-magnetic conducting part 132, the first magnetic conducting part 111, the first non-magnetic conducting part 131, the second magnetic conducting part 121 and the second non-magnetic conducting part 132 are sequentially connected end to end and surround to form the mounting hole 14 along the circumference of the mounting hole 14; the first magnetic conducting part 111 and the second magnetic conducting part 121 are symmetrically arranged, and the first non-magnetic conducting part 131 and the second non-magnetic conducting part 132 are symmetrically arranged.

[0062] The first magnetic conducting part 111, the first non-magnetic conducting part 131, the second magnetic conducting part 121 and the second non-magnetic conducting part 132 are sequentially connected end to end and surround to form an annular structure, and the inner hole of the annular structure forms the mounting hole 14.

[0063] For example, the first magnetic conducting part 111 and the second magnetic conducting part 121 are in the shape of a circular arc structure, the first non-magnetic conducting part 131 and the second non-magnetic conducting part 132 are in the shape of a circular arc structure, and the first magnetic conducting part 111, the second magnetic conducting part 121, the first non-magnetic conducting part 131, and the second non-magnetic conducting part 132 together form a circular ring structure that can be matched with a circular pipe opening. Of course, in other examples, the first magnetic conducting part 111, the second magnetic conducting part 121, the first non-magnetic conducting part 131, and the second non-magnetic conducting part 132 can also be in other shapes.

[0064] The first magnetic conducting part 111 and the second magnetic conducting part 121 are symmetrically arranged about the axis M of the mounting hole 14, and the first non-magnetic conducting part 131 and the second non-magnetic conducting part 132 are symmetrically arranged about the axis M of the mounting hole 14. The structure of the first magnetic conducting part 111 and the second magnetic conducting part 121 is also the same, and the structure of the first non-magnetic conducting part 131 and the second non-magnetic conducting part 132 is also the same.

[0065] By adopting the technical scheme of this embodiment, the first magnetic conducting part 111 and the second magnetic conducting part 121 are symmetrically arranged, so that the magnetic field distribution is more uniform, thereby improving the stability and sealing effect of the plugging device 100. The first non-magnetic conducting part 131 and the second non-magnetic conducting part 132 are symmetrically arranged, further optimizing the distribution of the magnetic field.

[0066] In some embodiments, the surface of the first magnetic conducting part 111 facing the mounting hole 14 is a first circular arc cylindrical surface 1111, the surface of the first non-magnetic conducting part 131 facing the mounting hole 14 is a second circular arc cylindrical surface 1311, the radius R1 of the first circular arc cylindrical surface 1111 is equal to the radius R2 of the second circular arc cylindrical surface 1311, and the central angle a1 corresponding to the first circular arc cylindrical surface 1111 is greater than the central angle a2 corresponding to the second circular arc cylindrical surface 1311.

[0067] The mounting hole 14 is a circular hole, the inner surface of the first magnetic conducting part 111 is a first circular arc cylindrical surface 1111, the inner surface of the first non-magnetic conducting part 131 is a second circular arc cylindrical surface 1311, the radius R1 of the first circular arc cylindrical surface 1111 is equal to the radius R2 of the second circular arc cylindrical surface 1311, and the central angle a1 corresponding to the first circular arc cylindrical surface 1111 is greater than the central angle a2 corresponding to the second circular arc cylindrical surface 1311, so that the circumferential dimension of the first magnetic conducting part 111 is greater than the circumferential dimension of the first non-magnetic conducting part 131, a stronger magnetic field can be generated, which is conducive to improving the magnetic attraction force between the plugging device 100 and the step surface and reducing the risk of the plugging device 100 being blown off.

[0068] In some embodiments, the end surface of the S pole 21 facing away from the N pole 22 is a third circular cylindrical surface 211, the radius R1 of the first circular cylindrical surface 1111 is equal to the radius R3 of the third circular cylindrical surface 211, and the central angle a3 corresponding to the third circular cylindrical surface 211 is smaller than the central angle a1 corresponding to the first circular cylindrical surface 1111. The end surface of the N pole 22 facing away from the S pole 21 is a fourth circular cylindrical surface 221, the radius R1 of the first circular cylindrical surface 1111 is equal to the radius R4 of the fourth circular cylindrical surface 221, and the central angle a4 corresponding to the fourth circular cylindrical surface 221 is smaller than the central angle a1 corresponding to the first circular cylindrical surface 1111.

[0069] The two end surfaces of the permanent magnet 20 distributed in opposite directions along the axis M perpendicular to the mounting hole 14 are both circular cylindrical surfaces, wherein the end surface located at the S pole 21 is a third circular cylindrical surface 211, and the end surface located at the N pole 22 is a fourth circular cylindrical surface 221.

[0070] The radius R1 of the first circular cylindrical surface 1111 is equal to the radius R3 of the third circular cylindrical surface 211, and the radius R1 of the first circular cylindrical surface 1111 is equal to the radius R4 of the fourth circular cylindrical surface 221, so that the S pole 21 and the N pole 22 can be in contact with the first magnetic conducting part 111 and the second magnetic conducting part 121, thereby enabling the magnetic force lines of the permanent magnet 20 to better enter the first magnetic conducting part 111 and the second magnetic conducting part 121, so that the first magnetic conducting part 111 and the second magnetic conducting part 121 have greater magnetic force, which is conducive to improving the magnetic attraction force between the plugging device 100 and the step surface.

[0071] The central angle a3 corresponding to the third circular cylindrical surface 211 is smaller than the central angle a1 corresponding to the first circular cylindrical surface 1111, and the central angle a4 corresponding to the fourth circular cylindrical surface 221 is smaller than the central angle a1 corresponding to the first circular cylindrical surface 1111, so that the circumferential dimension of the first circular cylindrical surface 1111 and the circumferential dimension of the second circular cylindrical surface 1311 are greater than the circumferential dimension of the third circular cylindrical surface 211 and the circumferential dimension of the fourth circular cylindrical surface 221, and the magnetic force lines generated by the permanent magnet 20 can all or more enter the first magnetic conducting part 111 and the second magnetic conducting part 121, so that the first magnetic conducting part 111 and the second magnetic conducting part 121 have greater magnetic force, which is conducive to improving the magnetic attraction force between the plugging device 100 and the step surface.

[0072] Figure 5 For Figure 1 An exploded view of the plugging device 100 is shown.

[0073] In some embodiments, the first magnetic conductor 11 comprises a third magnetic conducting part 112, the second magnetic conductor 12 comprises a fourth magnetic conducting part 122, along the axial direction of the mounting hole 14, one end of the first magnetic conducting part 111 is connected with the third magnetic conducting part 112, one end of the second magnetic conducting part 121 is connected with the fourth magnetic conducting part 122, the third magnetic conducting part 112 and the fourth magnetic conducting part 122 are located at the same end of the main body 10; the non-magnetic conductor 13 comprises a third non-magnetic conducting part 133 connected between the first non-magnetic conducting part 131 and the second non-magnetic conducting part 132, the third non-magnetic conducting part 133 is connected between the third magnetic conducting part 112 and the fourth magnetic conducting part 122; the third magnetic conducting part 112, the fourth magnetic conducting part 122 and the third non-magnetic conducting part 133 are used to close the opening of the mounting hole 14, the surface of the third magnetic conducting part 112 away from the mounting hole 14, the surface of the fourth magnetic conducting part 122 away from the mounting hole 14 and the surface of the third non-magnetic conducting part 133 away from the mounting hole 14 form the abutting surface 15.

[0074] The third magnetic conducting part 112 can refer to the part of the first magnetic conductor 11 used to shield the opening of the mounting hole 14; the fourth magnetic conducting part 122 can refer to the part of the second magnetic conductor 12 used to shield the opening of the mounting hole 14; the third non-magnetic conducting part 133 can refer to the part of the non-magnetic conductor 13 used to shield the opening of the mounting hole 14. The third non-magnetic conducting part 133 is connected between the third magnetic conducting part 112 and the fourth magnetic conducting part 122 to play a magnetic isolation role for the third magnetic conducting part 112 and the fourth magnetic conducting part 122.

[0075] For example, the third magnetic conducting part 112 and the fourth magnetic conducting part 122 are similar to semicircular shapes, the third non-magnetic conducting part 133 is in a long strip shape, the third magnetic conducting part 112 and the fourth magnetic conducting part 122 are connected to opposite sides of the third non-magnetic conducting part 133 to form a circular structure to close the opening of the mounting hole 14. The first non-magnetic conducting part 131 and the second non-magnetic conducting part 132 are connected to both ends of the third non-magnetic conducting part 133 and form a U-shaped structure, the periphery of the third magnetic conducting part 112 is connected with one end of the first magnetic conducting part 111 and forms a semi-cylindrical structure similar to one end closed, the periphery of the fourth magnetic conducting part 122 is connected with one end of the second magnetic conducting part 121 and forms a semi-cylindrical structure similar to one end closed, the first magnetic conductor 11, the second magnetic conductor 12 and the non-magnetic conductor 13 form a barrel structure with one end open and one end closed.

[0076] The third magnetic conducting part 112, the fourth magnetic conducting part 122 and the third non-magnetic conducting part 133 are arranged on one hand to close the opening of the mounting hole 14, reducing the risk of foreign matter falling into the system from the mounting hole 14, and on the other hand, the surface of the third magnetic conducting part 112 away from the mounting hole 14, the surface of the fourth magnetic conducting part 122 away from the mounting hole 14 and the surface of the third non-magnetic conducting part 133 away from the mounting hole 14 form an abutting surface 15, which increases the area of the abutting surface 15, is conducive to improving the connection area between the plugging device 100 and the step surface, improving the connection force between the plugging device 100 and the step surface, and reducing the risk of the plugging device 100 being blown off.

[0077] In some embodiments, the first magnetic conducting part 111 includes a first soft iron layer 1112 and a first protective layer 1113 connected together, and the first soft iron layer 1112 is located between the first protective layer 1113 and the mounting hole 14; the second magnetic conducting part 121 includes a second soft iron layer 1211 and a second protective layer 1212 connected together, and the second soft iron layer 1211 is located between the second protective layer 1212 and the mounting hole 14.

[0078] The first magnetic conducting part 111 has a double-layer structure, one layer close to the mounting hole 14 is the first soft iron layer 1112, and one layer away from the mounting hole 14 is the first protective layer 1113. The first soft iron layer 1112 can be a layer structure made of soft iron material, such as electrical soft iron, industrial pure iron, silicon steel, low carbon steel, etc. The first protective layer 1113 is used to protect the layer structure of the first soft iron layer 1112, and the first protective layer 1113 can be a layer structure made of soft iron material, such as stainless steel, aluminum alloy, copper alloy. The first protective layer 1113 is connected with the third magnetic conducting part 112, and the first protective layer 1113 and the third magnetic conducting part 112 are integrally formed or separately formed and assembled together.

[0079] The first soft iron layer 1112 has good magnetic conducting performance and can effectively guide and enhance the magnetic field. At the same time, the first protective layer 1113 can protect the first soft iron layer 1112, reduce its corrosion and damage from the external environment, and improve the service life of the plugging device 100.

[0080] The second magnetic conducting part 121 is a double-layer structure, one layer close to the mounting hole 14 is a second soft iron layer 1211, and one layer away from the mounting hole 14 is a second protective layer 1212. The second soft iron layer 1211 can be a layer structure made of soft iron material, for example: electrical soft iron, industrial pure iron, silicon steel, low carbon steel, etc. The second protective layer 1212 is used to protect the layer structure of the second soft iron layer 1211. The second protective layer 1212 can be a layer structure made of soft iron material, for example: stainless steel, aluminum alloy, copper alloy. The second protective layer 1212 is connected with the fourth magnetic conducting part 122. For example, the second protective layer 1212 and the fourth magnetic conducting part 122 are an integrated structure or are separately formed and assembled together.

[0081] The second soft iron layer 1211 has good magnetic conducting performance and can effectively guide and enhance the magnetic field. At the same time, the second protective layer 1212 can protect the second soft iron layer 1211, reduce its corrosion and damage from the external environment, and improve the service life of the plugging device 100.

[0082] In some embodiments, at least one of the first soft iron layer 1112 and the second soft iron layer 1211 is an electrical soft iron layer; and / or, at least one of the first protective layer 1113 and the second protective layer 1212 is a cast iron layer.

[0083] The electrical soft iron layer is a kind of soft magnetic material with high magnetic permeability and low coercivity, which is usually used in occasions that require efficient conduction and enhancement of the magnetic field. It is a special type of soft iron that has been specially treated (such as annealing) to optimize its magnetic properties.

[0084] The cast iron layer can be a layer structure made of cast iron.

[0085] For example, the first soft iron layer 1112 is an electrical soft iron layer.

[0086] For example, the second soft iron layer 1211 is an electrical soft iron layer.

[0087] For example, the first soft iron layer 1112 and the second soft iron layer 1211 are electrical soft iron layers.

[0088] For example, the first protective layer 1113 is a cast iron layer.

[0089] For example, the second protective layer 1212 is a cast iron layer.

[0090] For example, the first protective layer 1113 and the second protective layer 1212 are cast iron layers.

[0091] The electrically soft iron layer has good magnetic conductivity, and has high permeability, which can effectively conduct the magnetic field generated by the permanent magnet 20, so that the magnetic lines of force pass through the magnetic conducting part to the abutting surface 15, and the magnetic attraction with the pipe mouth step surface is enhanced. The cast iron layer can protect the soft iron layer from damage such as collision, wear and corrosion during use, and increase the overall strength of the plugging device 100, making it more durable.

[0092] Figure 6 For Figure 1 The structure diagram of the plugging device 100 is shown.

[0093] In some embodiments, the surface of the main body 10 away from the mounting hole 14 is provided with a flange structure 16, and the flange structure 16 is annularly arranged outside the main body 10, and the flange structure 16 is located at the end of the main body 10 away from the abutting surface 15.

[0094] The flange structure 16 can refer to a protruding structure provided on the outer surface of the main body 10, which extends around the circumference of the main body 10, and the protruding structure and the abutting surface 15 are located at opposite ends of the main body 10.

[0095] The outer surface of the first magnetic conducting part 111 (for example: the surface of the first protective layer 1113 away from the first soft iron layer 1112) is provided with a first protruding part 1114, the outer surface of the second magnetic conducting part 121 (for example: the surface of the second protective layer 1212 away from the second soft iron layer 1211) is provided with a second protruding part 1213, the outer surface of the first non-magnetic conducting part 131 is provided with a third protruding part 1312, and the outer surface of the second non-magnetic conducting part 132 is provided with a fourth protruding part 1321. The first protruding part 1114, the third protruding part 1312, the second protruding part 1213 and the fourth protruding part 1321 are sequentially connected in a closed loop along the circumference of the mounting hole 14, and the first protruding part 1114, the third protruding part 1312, the second protruding part 1213 and the fourth protruding part 1321 form the flange structure 16.

[0096] After the abutting surface 15 is magnetically attracted to the step surface, the flange structure 16 can block the gap between the main body 10 and the inner wall of the pipe mouth, thereby reducing the risk of foreign matter falling into the pipe mouth and reducing the risk of system damage.

[0097] In some embodiments, the non-magnetic conductor 13 is a brass body.

[0098] The brass body is made of brass, which has good non-magnetic conductivity and can effectively isolate and limit the diffusion of the magnetic field. When the permanent magnet 20 is arranged opposite to the first magnetic conducting part 111 and the second magnetic conducting part 121, the plugging device 100 can be stably magnetically attracted to the pipe mouth.

[0099] In some embodiments, the first non-magnetic conductive portion 131, the second non-magnetic conductive portion 132 and the third non-magnetic conductive portion 133 are integrally formed or separately formed and assembled together.

[0100] In some embodiments, the plugging device 100 further comprises a cover 30, which covers the opening of the mounting hole 14 away from the abutting surface 15.

[0101] The cover 30 can be a component for closing the opening of the mounting hole 14, which can be made of plastic or other materials. The cover 30 covers the opening of the mounting hole 14 and can block foreign matter from the mounting hole 14.

[0102] In some embodiments, the plugging device 100 comprises a rotating handle 40, which is rotatably mounted on the side of the cover 30 away from the mounting hole 14. The rotating handle 40 is connected with the permanent magnet 20 and is used to drive the permanent magnet 20 to rotate.

[0103] The rotating handle 40 can be a component for a person to operate to drive the permanent magnet 20 to rotate. The rotating handle 40 is located on the side of the cover 30 away from the mounting hole 14 and is located on the outside to facilitate the rotation of the rotating handle 40.

[0104] For example, the rotating handle 40 is connected with the permanent magnet 20 through a rotating shaft 50, one end of the rotating shaft 50 is fixedly connected with the rotating handle 40, and the other end of the rotating shaft 50 is connected through the cover 30 and the permanent magnet 20.

[0105] The rotating handle 40 is used to drive the permanent magnet 20 to rotate, so that the installation and disassembly of the plugging device 100 are simple and convenient.

[0106] The above description of various embodiments tends to emphasize the differences between various embodiments, and the same or similar parts can be referred to each other, and for the sake of brevity, will not be repeated here.

[0107] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An occlusion device for occluding a tubular orifice, the device comprising: The plugging device comprises: a main body comprising a non-magnetic body, a first magnetic body and a second magnetic body, the first magnetic body and the second magnetic body are spaced apart along a first direction and form a gap, the non-magnetic body is connected between the first magnetic body and the second magnetic body and located in the gap, the first magnetic body, the non-magnetic body and the second magnetic body form an installation hole, and the first direction is perpendicular to the axial direction of the installation hole; the end faces of the first magnetic body and the second magnetic body located on the same side form an abutting surface, which is used for abutting against a stepped surface in the pipe opening; a permanent magnet is rotatably installed in the installation hole, and the rotation axis of the permanent magnet coincides with the axis of the installation hole; the two ends of the permanent magnet perpendicular to the axial direction of the installation hole form S pole and N pole respectively.

2. The occlusion device of claim 1, wherein: The first magnetic body comprises a first magnetic portion, the second magnetic body comprises a second magnetic portion, the non-magnetic body comprises a first non-magnetic portion and a second non-magnetic portion, the first magnetic portion, the first non-magnetic portion, the second magnetic portion and the second non-magnetic portion are sequentially connected in a head-to-tail manner along the circumferential direction of the installation hole and form the installation hole; the first magnetic portion and the second magnetic portion are symmetrically arranged, and the first non-magnetic portion and the second non-magnetic portion are symmetrically arranged.

3. The occlusion device of claim 2, wherein: The surface of the first magnetic portion facing the installation hole is a first circular arc cylindrical surface, the surface of the first non-magnetic portion facing the installation hole is a second circular arc cylindrical surface, the radius of the first circular arc cylindrical surface is equal to the radius of the second circular arc cylindrical surface, and the corresponding central angle of the first circular arc cylindrical surface is greater than the corresponding central angle of the second circular arc cylindrical surface.

4. The occlusion device of claim 3, wherein: The end face of the S pole away from the N pole is a third circular arc cylindrical surface, the radius of the first circular arc cylindrical surface is equal to the radius of the third circular arc cylindrical surface, and the corresponding central angle of the third circular arc cylindrical surface is smaller than the corresponding central angle of the first circular arc cylindrical surface; The end face of the N pole away from the S pole is a fourth circular arc cylindrical surface, the radius of the first circular arc cylindrical surface is equal to the radius of the fourth circular arc cylindrical surface, and the corresponding central angle of the fourth circular arc cylindrical surface is smaller than the corresponding central angle of the first circular arc cylindrical surface.

5. The occlusion device of any one of claims 2-4, wherein: The first magnetic body comprises a third magnetic portion, the second magnetic body comprises a fourth magnetic portion, and along the axial direction of the installation hole, one end of the first magnetic portion is connected with the third magnetic portion, and one end of the second magnetic portion is connected with the fourth magnetic portion; the third magnetic portion and the fourth magnetic portion are located at the same end of the main body; The non-magnetic body comprises a third non-magnetic portion connected between the first non-magnetic portion and the second non-magnetic portion, and the third non-magnetic portion is connected between the third magnetic portion and the fourth magnetic portion; the third magnetic portion, the fourth magnetic portion and the third non-magnetic portion are used for closing one end opening of the installation hole, and the surface of the third magnetic portion away from the installation hole, the surface of the fourth magnetic portion away from the installation hole and the surface of the third non-magnetic portion away from the installation hole form the abutting surface.

6. The occlusion device of any one of claims 2-4, wherein: The first magnetic-conduction part comprises a first soft iron layer and a first protection layer connected with each other, and the first soft iron layer is located between the first protection layer and the mounting hole. The second magnetic-conduction part comprises a second soft iron layer and a second protection layer connected with each other, and the second soft iron layer is located between the second protection layer and the mounting hole.

7. The occlusion device of claim 6, wherein: At least one of the first soft iron layer and the second soft iron layer is an electrical soft iron layer; and / or at least one of the first protection layer and the second protection layer is a cast iron layer.

8. The occlusion device of any of claims 1-4, wherein: A surface of the main body away from the mounting hole is provided with a flange structure, the flange structure is annularly arranged outside the main body, and the flange structure is located at an end of the main body away from the abutting surface.

9. The occlusion device of any of claims 1-4, wherein: The non-magnetic-conduction body is a brass body.

10. The occlusion device of any of claims 1-4, wherein: The plugging device further comprises a cover body and a rotating handle, the cover body covers an opening of the mounting hole away from the abutting surface; The rotating handle is rotationally arranged at a side of the cover body away from the mounting hole, the rotating handle is connected with the permanent magnet, and the rotating handle is used to drive the permanent magnet to rotate.

Images